Positive-displacement machines for liquids and pumps for liquids or elastic fluids (F04)

F04            Positive-displacement machines for liquids; pumps for liquids or elastic fluids(23483)

Jet steam-water heating device // 2629104
FIELD: heating.SUBSTANCE: device includes a jet apparatus 1, an electric pump 2, a vacuum pump 3 comprising an inlet chamber 4 with tangential supply 5 of the heat-carrying medium and an inlet nozzle 6 located in its central portion 7, and an outlet chamber 8 with an outlet nozzle 9to discharge the heat-carrying medium to the consumer, a ring gap 10 formed by an expanding cone 11 and a hydraulic throttle 12 in the form of a truncated cone, wherein the construction of the jet apparatus 1 is similar to the vacuum pump 3 construction, its inlet chamber 13 is provided with an outlet nozzle 14 to discharge the heat-carrying medium from its central part 15, and its outlet chamber 16 is provided with discharge nozzle 17 for the heat-carrying medium discharge. Jet apparatus 1 is mounted axially with respect to the vacuum pump 3 and oppositely to its inlet chambers 13 and 4, connected by a pump line 18 with a shut-off valve 19. Inlet pump line 20 and outlet pump line 21 of the vacuum pump 3 heat-carrying medium and a pump line 22 of the heat-carrying medium discharge from the jet apparatus 1 are provided with electric pumps 23, 24, 25, and the said pump lines and a pump line 34 of the heat-carrying medium inlet are provided with temperature sensors 26, 27, 28 and 29 respectively. In addition, hydraulic throttles 33 and 12 of the jet apparatus and the vacuum pump are made in the form of a truncated cone, and the jet apparatus includes a ring gap 31 formed by an expanding cone 32 and a hydraulic trottle 33.EFFECT: increased heat output of heat-carrying medium.2 cl, 1 dwg

Scroll compressor and method of its operation // 2629049
FIELD: machine engineering.SUBSTANCE: scroll compressor includes a housing 1, a suction cavity 2, a discharge cavity, which is also an oil sump 3, a driving and driven spiral elements 6, 7 engaged with each other, having fixed eccentric axes of rotation. Each of the elements 6, 7 consists of a base and a spiral blade 34, 35 disposed thereon. In the housing 1, oil supply channels 22, 23 are provided, communicating with the oil cavities 16, 24. Between the bases of the elements 6, 7 and the housing 1, cylindrical channels 17, 25 and annular sealing bands are made, and in the element bases there are paired holes for feeding lubricant therethrough into the space between the elements 6, 7 under the action of centrifugal forces in order to form hydrodynamic lubrication wedges in working condition between them. The oil sump 3 is configured to recycle the lubricant.EFFECT: increased reliability of the compressor operation and increased service life, improved technological design of the working node by eliminating the synchronizing device.8 cl, 4 dwg
Prefabricated rotor balancing method // 2628850
FIELD: machine engineering.SUBSTANCE: determine the initial overbalances and the maximum radial runout of the shaft surface, adjust and balance the prefabricated rotor, providing the direction of the shaft sections residual overbalances and the prefabricated rotor mounted elements in the direction opposite to the maximum radial runout of the shaft surface. In this case, the mounted elements are divided into pairs, the measurement of the initial overbalances is carried out in the correction planes of the prefabricated rotor mounted elements each pair. The maximum radial runout of the shaft surface is determined at the middle section of the shaft, the entire rotor is adjusted by the temporary loads installation. The balancing of the prefabricated rotor is carried out consequently for each pair of the mounted elements: the first temporary loads are removed from the pair of the mounted elements, then the prefabricated rotor is balanced, and then the prefabricated rotor is completely adjusted by the installation of the removable loads, the masses of which are determined by the balancer read-outs, in the same pair correction planes of the mounted elements.EFFECT: balancing accuracy improvement.3 dwg

ethod for manufacturing combined hollow blade of turbomachine of aluminium alloy // 2628843
FIELD: metallurgy.SUBSTANCE: method for producing a hollow blade of a turbomachine of aluminium alloy comprises forming blade back and trough elements by imparting with aluminium alloy a predetermined profile and dimensions to the plates, fixing them and providing predetermined profile and dimensions of the blade and their subsequent integral connection between each other. The blade back and trough elements of aluminium alloy are connected to each other through additional metal element made of titanium or titanium alloy or alloyed steel, forming an inlet and oulet blade edges which correspond to profile and sizes of inlet and outlet blade edges and having cavities providing conjugated connection to the blade back and trough elements.EFFECT: increase of strength properties and erosion resistance.8 cl, 2 dwg

Hydraulic borehole pump unit // 2628840
FIELD: engine devices and pumps.SUBSTANCE: hydraulic borehole pump unit contains a power gear pump driven by an immersion motor with a compensator, a hydraulic motor with a cylinder and a piston, a working pump connected to the piston of the hydraulic motor by a rod. The cavities of the cylinder of the hydraulic motor are connected through a distributor with an inlet and through a safety valve - with the output of a power gear pump. The unit is equipped with an oil tank with a compensator for its volume, in one of the sections of which an overflow valve with a filter is installed. The distributor is made self-reversing. At the output of the power gear pump after the safety valve, a high-pressure cut-off valve is installed. The power gear pump is sectional, and the working pump is a commercially available long-stroke deep-well high-pressure pump, the shank of which is sealed with a packer.EFFECT: increased reliability, by improving the design.1 dwg

Centrifugal pump impeller // 2628684
FIELD: engine devices and pumps.SUBSTANCE: impeller contains the main disk (1) with a hub (2), a cover disc (3) and nonlinear recurved blades (7) between them. In the disk (1), through holes (5) are made between the input sections of the blades, and on the outer side of the disk (1), there is an annular coaxial hub (2) of the shoulder (6). The impeller is cast with a deflection in the pitch of the blades in their inlet portion of no more than 2 mm and at the outlet portion - of no more than 3 mm. The outer surface of the disc (1) between the hub (2) and the collar (6) is conical, smoothly mated with the hub (2) and the surface of the shoulder (6). The generator of the conical surface is inclined to the wheel axis at an angle of 65°±5°. The internal diameter of the shoulder (6) is from 0.4 to 0.44 of the diameter of the wheel. The holes (5) are located closer to the concave side of the blade in a circle, the diameter of which is 0.28 to 0.3 of the diameter of the wheel. The diameter of the holes (5) is from 0.034 to 0.037 of the diameter of the wheel. The peripheral outer portions of the discs (1, 3) are formed by conical surfaces, tapering to the periphery of the impeller and the generators of which are inclined to the impeller axis at an angle of 75°±5°. The diameter of the wheel is from 203 mm before 201 mm.EFFECT: reduces the amount of axial force on the impeller that occurs when the pump is running.3 dwg

Centrifugal pump impeller // 2628683
FIELD: engine devices and pumps.SUBSTANCE: impeller contains the main disk (1) with a hub (2), a cover disc (3) and nonlinear recurved blades (7) between them. In the disk (1), through holes (5) are made between the input sections of the blades, and on the outer side of the disk (1), there is an annular coaxial hub (2) of the shoulder (6). The impeller is cast with a deflection in the pitch of the blades in their inlet portion of no more than 2 mm and at the outlet portion - of no more than 3 mm. The outer surface of the disc (1) between the hub (2) and the collar (6) is conical, smoothly mated with the hub (2) and the surface of the shoulder (6). The generator of the conical surface is inclined to the wheel axis at an angle of 65°±5°. The internal diameter of the shoulder (6) is from 0.4 to 0.45 of the diameter of the wheel. The holes (5) are arranged in a circle, the diameter of which is 0.3 to 0.32 of the diameter of the wheel. The peripheral outer areas of the discs (1, 3) are formed by conical surfaces tapering toward the periphery of the wheel, which are inclined to the wheel axis at an angle of 75°±5°. The diameter of the wheel is from 120 mm before 123 mm.EFFECT: reduces the amount of axial force on the impeller that occurs when the pump is running.3 dwg

Centrifugal pump impeller // 2628681
FIELD: engine devices and pumps.SUBSTANCE: centrifugal pump impeller contains a main disk (1) with a hub (2), a cover plate (3) and nonlinear recurved blades (4). In the disk (1), through holes (5) are formed between the inlet portions of the blades (4), and on the outer side of the impeller on the disk (1) there is an annular shoulder (6), coaxially surrounding the hub (2) portion. The impeller is cast with a deflection in the pitch of the blades (4) in their inlet portion of no more than 2 mm and at the outlet portion - of no more than 3 mm. The outer surface of the disc (1), located between the hub portion (2), protruding from it, and the shoulder (6), is nonlinear to form a portion of the torus surface, smoothly conjugated from the smaller diameter side to the hub (2) and from the larger diameter side to the cylindrical surface of the shoulder (6). The axis of each hole (5) is inclined to the impeller axis at an angle of 33°±5°. The inner diameter D1 of the shoulder (6) is from 0.59 to 0.61 of the diameter D2 of the disc (1). The holes (5) are arranged along the circumference, the diameter D3 of which is 0.37 to 0.38 of D2. Between the disks (1, 3) there are 7 blades (4). D2 is from 0.96 to 0.98 of the diameter D4 of the disc (3). D4 is from 233 mm to 230 mm.EFFECT: reduction of the axial force on the impeller.2 dwg

Electrically driven downhole unit (versions) // 2628679
FIELD: engines and pumps.SUBSTANCE: installation contains an immersion motor and a power station, which includes at least one drive oil pump, kinematically connected to the motor. Hydraulic actuator comprises two pistons articulated by intermediate rod. End face of every piston is furnished with rod. Hydraulic control valve is communicated with driven pump and hydraulic actuator. The working fluid compensator is installed in the discharge pipe. A pump including housing and valves are arranged outside of each rod. Two chambers between every piston and rod seals make barrier space. Each of the areas is hydraulically interconnected internally and with the compensator of the working fluid through a common channel. The compensator is made in the form of a diaphragm made of an elastomeric material, changing its shape with a pressure difference inside and outside the diaphragm by not more than 0.5 m of the water column. The diameter of the channels between each area of the barrier space and the common channel is such that the oil pressure is higher than the pressure of the pumped liquid on the rod seals by at least 5 m of water column. The intermediate rod is made without channels connecting the areas of the barrier space. In the second version, the groups of channels that perform hydraulic communication between the hydraulic distributor and the hydraulic motor are made inside the hydraulic motor housing.EFFECT: increased reliability of the plant, period of its operation, reduced cost.10 cl, 7 dwg

Centrifugal pump impeller // 2628678
FIELD: engine devices and pumps.SUBSTANCE: impeller contains the main disk (1) with a hub (2), a cover disc (3) and 7 nonlinear recurved blades (4) placed between them. In the disk (1), through holes (5) are made between the blades input sections, and on the outer side of the disk (1), an annular collar (6) is made coaxial to the hub (2). The outer surface of the disc (1) between the hub (2) and the collar (6) is made flat, perpendicular to the impeller axis and smoothly mated with the inner collar (6) cylindrical surface. The wheel is cast with a deviation in the pitch of blades in their entrance area, no more than 2 mm and at the exit section, no more than 3 mm, the internal collar diameter D1 (6) is from 0.49 to 0.50 of impeller diameter D2. The holes (5) are located near the concave side of the blade (4) along a circle, the diameter of which is 0.35 to 0.36 of impeller diameter D2. The diameter of holes (5) is from 0.041 to 0.043 of impeller diameter D2. The peripheral outer discs parts (1, 3) are formed by conical surfaces, tapering to the periphery of the impeller and the generators of which are inclined to the impeller axis at an angle of 75±5°. The diameter of impeller is from 169 to 167 mm.EFFECT: reducing the amount of axial force on the impeller that occurs when the pump is running.2 dwg

Stage of submersible multistage centrifugal pump // 2628470
FIELD: engine devices and pumps.SUBSTANCE: stage of a submersible multistage centrifugal pump contains an impeller and a guide device, which consists of a housing, a top disc, a metal bushing, a bottom disc and blades. The guide vanes are located only on the top disc, which is connected to the metal housing. The metal bushing is connected to the bottom disc. The disks and blades of the impeller and the discs and vanes of the guide device are made of a polymer material including a glass-filler and a thermoplastic material.EFFECT: increase in efficiency, maintainability, resistance to abrasive wear and precipitation of mechanical impurities, including salts, in the channels of the guide device and stage impeller, reduction in the pump supply drop with increasing viscosity of the formation fluid.6 cl, 10 dwg

Internal combustion engine with liquid cooling and operating mode of internal combustion engine with liquid cooling // 2628140
FIELD: engines and pumps.SUBSTANCE: invention relates to a internal combustion engine with liquid cooling comprising a cylinder head, a refrigerant circuit for liquid cooling providing, comprising a cooling ribs integrated in the cylinder head, a pressure line for supplying a coolant to the cooling ribs, an outlet for discharging the refrigerant and a return line that is branched off from the discharge line and is open to the pressure line, and a refrigerant pump (1) provided in the refrigerant circuit for refrigerant supply the drive of which contains a liquid frictional clutch (1a) controlling the power of the refrigerant pump (1), the liquid friction clutch (1a) comprises a storage chamber (3) for storing the frictional fluid and a shear chamber (4) which is separated from the storage chamber (3) by means of a wall and in which, by means of a frictional fluid, the torque can be transmitted from the pump input component (6b) to the pump output component (6a), which is mechanically coupled to the pump (1) supply device (8), the storage chamber (3) and the shift chamber (4) can be connected together or separated from each other by a connecting channel (12). An internal combustion engine is proposed in which the amount of refrigerant supplied by the refrigerant pump can vary to a greater or lesser extent. This is achieved by an internal combustion engine which is provided with an additional pump (9) for supplying a frictional fluid by means of which the frictional fluid can be actively supplied between the storage chamber (3) and the shear chamber (4).EFFECT: regulation of the refrigerant supply.17 cl, 1 dwg

Circulating pump unit and solar plant // 2628134
FIELD: engines and pumps.SUBSTANCE: pump unit (2) has an electric drive motor (6) and a control device (10) integrated in the unit (2). In the pump unit (2) there is at least one internal temperature sensor (16) that senses the temperature of the medium pumped by the unit (2) and supplies the corresponding temperature signal to the control device (10). The control device (10) is configured so as to approximately determine the temperature of the liquid in the fluid reservoir connected to the pump unit (2) based on the sensor temperature signal (16) through the heating circuit. The device (10) is integrated in the pump unit (2). When the engine (6) is stopped on the basis of the temperature signal supplied by the sensor (16) earlier in the operation of the engine (6), during a further change in time it approximately determines the temperature of the liquid in the tank connected to the unit (2) through the heating circuit.EFFECT: improved design of the solar plant with a pump unit due to simplified installation and reduced susceptibility to malfunctions during operation.13 cl, 4 dwg

Rotor hydro-pneumatic machine // 2627753
FIELD: machine engineering.SUBSTANCE: rotor hydro-pneumatic machine contains the housing 1, in which the driving and driven operating gears 5 and 4 are arranged, consisting of the hollow hub and the central disk with asymmetrical profiled teeth 2 and 3, located on its periphery, connected to the gears 4, 5 and the synchronizing gears 6, 7 with the symmetrical teeth profile concentrically to them on the shafts, the feed-in and out channels of the operating fluid, the sealing elements. The gears 4-7 are made conical, and each of two pairs of similar gears forms the axial gears with axes of rotation, intersecting in one point. The kinematic connection is formed between the working and synchronizing gears, containing the fixing and elastic elements 19 and 14. Two feed-in and out channels are located on the housing 1 in the maximum teeth 2, 3 overlap area of the gears 4, 5, and the other two - in the areas of the teeth 2, 3 engagement beginning. The feed-in and out channels are located on the housing 1 periphery and are provided with the locking equipment.EFFECT: reduction of the device dimensions, increase of its functional parameters and expansion of the technological possibilities.25 cl, 22 dwg

Adjustable circular pump // 2627746
FIELD: engines and pumps.SUBSTANCE: adjustable circular pump contains a housing inside which a rotor is installed in the form of a shaft with end disks with radial grooves, in which the axes of the rollers located between the discs can be reciprocated. The outer surface of the rollers interacts with the outer surface of the compensating ring, which is freely and eccentrically mounted on the rotor shaft. Inside the case with a possibility of forced reciprocating movement between the discs, the glass with an inner cylindrical surface contacting the outer surface of the rollers is installed. In the shell of the glass, the holes are provided that ensure the flow of pumped medium from the inlet to the outlet holes made in the housing. Bypasses are made in the body. Compensation valves are installed on the shell of the cup from opposite sides.EFFECT: providing the possibility of capacity control without changing the speed of rotation of the rotor and without significantly complicating the design of the pump.2 dwg

Displacement roller pump // 2627488
FIELD: engines and pumps.SUBSTANCE: pump comprises a stator housing 1 and a rotor 3 with slots 4 rotatably mounted on a shaft in the inner cavity of the stator housing 1, in which the cylindrical rollers 5 are located, and face covers 8, closing the upper and lower working chambers formed by the rotor 3 outer surface, the inner surface of the stator housing 1 and the side surface of the roller 5. The pump is multi-stage. The upper cover 8 of the previous stage is used as a bottom cover 8 for the next stage. The adjacent stages are positioned with respect to each other with an angular displacement, enabling the injection zone of the previous stage and the suction of the subsequent stage to be aligned with the channel 10 in the cover 8. The shape of the inner surface of the stator housing 1 is made with a monotonically varying curvature of the profile, described by the equation.EFFECT: providing the required pump head to lift liquid from an oil well of random depth and increase time of its trouble-free operation.3 dwg

Centrifugal pump impeller // 2627484
FIELD: engine devices and pumps.SUBSTANCE: impeller contains the main disk (1) with a hub (2), a cover disc (3) and nonlinear recurved 7 blades (4) between them. In the disk (1), through holes (5) are made between the input sections of the blades, and on the outer side of the disk (1), there is an annular coaxial hub (2) of the shoulder (6). The wheel is cast with a deviation in the pitch of the blades in their entrance area, no more than 2 mm And at the output section, no more than 3 mm the outer surface of the disc (1) between the hub (2) and the collar (6) is conical, smoothly mated with the hub (2) and the surface of the shoulder (6). The axis of each hole (5) is inclined to the impeller axis at an angle of 33°±5°. The internal diameter of the shoulder (6) is from 0.59 to 0.61 of the diameter of the wheel. The holes (5) are arranged in a circle, the diameter of which is from 0.04 to 0.05 of the diameter of the wheel. The diameter of the wheel is from 287 mm before 285 mm.EFFECT: reduces the amount of axial force on the impeller that occurs when the pump is running.3 dwg

Centrifugal pump impeller // 2627477
FIELD: engine devices and pumps.SUBSTANCE: impeller contains a main disk (1) with a hub (2), a cover disc (3) and nonlinear recurved blades (4) between them. In the disk (1), through holes (5) are formed between the inlet portions of the blades (4). The axes of the through holes are parallel to the axis of the impeller. A ring shoulder (6), coaxially surrounding the hub (2), is made on the outer side of the impeller on the disc (1). The outer surface of the disc (1) between the hub (2) and the shoulder (6) is flat, perpendicular to the axis of the impeller and smoothly mated with the inner cylindrical surface of the shoulder (6). The impeller is cast with a deflection in the pitch of the blades (4) in their inlet portion of no more than 2 mm and at the outlet portion - of no more than 3 mm. The internal diameter D1 of the shoulder (6) is from 0.44 to 0.45 of the diameter D2 of the impeller. The holes (5) are located near the concave side of the blade (4) along the circumference with a diameter D3 of 0.32 to 0.34 of D2. The diameter of the holes (5) is from 0.044 to 0.046 of D2. Between the disks (1,3) there are 8 blades (4). The peripheral outer portions of the discs (1,3) are formed by conical surfaces, tapering to the periphery of the impeller and the generators of which are inclined to the impeller axis at an angle of 75°±5°. The diameter of the impeller is from 226.0 mm to 224 mm.EFFECT: reduction of the axial force effecting the impeller.2 dwg

Centrifugal pump impeller // 2627476
FIELD: engine devices and pumps.SUBSTANCE: impeller contains the main disk (1) with a hub (2), a cover disc (3) and nonlinear recurved blades (7) between them. In the disk (1), through holes (5) are made between the input sections of the blades, and on the outer side of the disk (1), there is an annular coaxial hub (2) of the shoulder (6). The wheel is cast with a deviation in the pitch of the blades in their entrance area, no more than 2 mm And at the output section, no more than 3 mm the outer surface of the disc (1) between the hub (2) and the collar (6) is conical, smoothly mated with the hub (2) and the surface of the shoulder (6). The axis of the hole (5) is inclined to the wheel axis at an angle of 25°±5°, The internal diameter of the shoulder (6) is 0.4 to 0.45 of the diameter of the wheel. The holes (5) are arranged around the circumference and their diameter ranges from 0.038 to 0.041 of the diameter of the wheel. The peripheral outer portions of the discs (1, 3) are formed by conical surfaces, tapering to the periphery of the impeller and the generators of which are inclined to the impeller axis at an angle of 75°±5°. The diameter of the wheel is from 155 to 157 mm.EFFECT: reduces the amount of axial force on the impeller that occurs when the pump is running.3 dwg

Rod well pump beamless drive // 2627475
FIELD: oil and gas industry.SUBSTANCE: beamless drive contains the lifting module, which is designed to be mounted on the wellhead equipment and consists of three pipes connected by the brace. The traction rope passes through the upper and lower pulley, connected from one side through the rod rotor with the polished rod, and from the other hand - with one crank arm. At least one counterweight is mounted on the other crank arm. The traction rope is routed from the lifting module upto the crank through at least one thrust pipe.EFFECT: simplification of the design, reduction of metal consumption, elimination of the foundation need, simplification of installation and maintenance, reduction of the operational labor.2 cl, 5 dwg

Axial fan and method of manufacturing an axial fan // 2626911
FIELD: ventilation.SUBSTANCE: axial fan has a motor (1) on which the impeller (24) is fixed on the rotor side, from which the fan blades (24) with the front and rear edges (26, 27) extend from the hub (hub). The motor (1) is fixed to the body (3) with a suspension (2). The suspension has a strut element (4-8) of planar material that connects the motor (1) to the body (3) and is positioned approximately in the "on the rib" direction in the direction of the air flow. In order to produce an axial fan in such a way that it has a high overall efficiency, as well as only a slight resistance to flow, the strut element (4-8) is provided with at least one notch (7) on its length part. Through the cut-out pressure flow resistance element fairing, minimize. Cut-out reduces the weight of the axial fan.EFFECT: axial fans have strongly reduced noise level, since the magnitude of the vortex flow detachment zones dramatically reduced thanks to the cutouts.12 cl, 10 dwg

Turboair well bottom-hole pump drive // 2626900
FIELD: oil and gas industry.SUBSTANCE: drive contains esturial rods, a hydraulic cylinder with a float equipped with a toroidal cavity at the bottom, a control device connected to limit switches at dead points of float positions and a controlled valve. The power unit includes a centrifugal fan with an electric motor. The controlled valve is provided with flanges, one of which is connected to the air cavities of the hydraulic cylinder below the upper bottom of the cylinder and below the bulkhead of the float, forming a closed loop, and others are connected with the input and output of the centrifugal fan. The volume of the closed sealed toroidal cavity of the float is sufficient to achieve expulsive force which balances the mass of the well's line of rods, the float and half of the lifted mass of the oil column.EFFECT: high resource is provided without friction of pistons, liquid oils, a fan with low revs, reduced drive weight, simplified design.5 cl, 5 dwg

Fan of ejector type with electrostatic filter // 2626891
FIELD: ventilation.SUBSTANCE: fan contains a base and nozzles mounted on the base. The impeller and the motor for driving the impeller are installed in the base to create an air flow. The nozzle includes an air inlet, an air outlet and an annular body forming a nozzle passage through which air is sucked from outside the fan by air exiting the air outlet. An electrostatic filter is installed in the channel of the nozzle to purify the air, which is tightened through the channel of the nozzle.EFFECT: power boost.21 cl, 16 dwg

Compressor housing with cavities having optimized form upstream // 2626874
FIELD: machine engineering.SUBSTANCE: housing for a compressor of a turbomachine, which comprises not communicating with each other cavities (5) cut in the thickness of mentioned housing at its inner surface and disposed parallel to each other along the circumference of mentioned housing, herewith mentioned cavities, which have an elongated shape, extending in the warp direction orientation between the two side walls and are closed, respectively upstream and downstream of the front side and the rear side, the intersections of which with the inner surface of the housing ( 4) respectively form an inlet boundary (7) and an output boundary (6) according to the invention the front edge (7) of these cavities (5) has the shape of a wavy line, comprising at least two interlaces along its length included between said side walls.EFFECT: presence of wavy line promotes mixing of the re-injected air with the primary air stream and thus improves the efficiency and surge margin of stability of the respective compressor stage, using the shell.9 cl, 5 dwg

Device for measuring the number of machine-rocking pumps swings // 2626616
FIELD: oil and gas industry.SUBSTANCE: device includes a magnetic label on the crank and the catcher signal centered on the frame bracket. Signal separator is designed as a hollow bracket inside which position sensor is installed, working on the principle of change of EMF, fixed cover. The bracket has two nuts that allow secure it perpendicular to the major axis of machine-rocking pumps. In the center of the bracket there is a cable channel that connects the sensor to the recording unit, which processes the incoming signal and displays it on the screen, also recording data on the work of the rocking machine for the entire period of time and transmitting data to the screen or via the USB interface. The magnetic mark is fixed on the inside of the crank facing the frame of the rocking machine, at a distance from the axis of rotation of the crank so that the central axes of the signal trap and the magnetic mark when crossing the crank through the horizontal plane crossing the magnetic mark coincide. The distance between the working surface of the signal trap and the working surface of the magnetic mark must not be more than the distance of the magnetic lines of force.EFFECT: efficiency and reliability of work is increased.3 dwg

Long hollow wide chord fan blade and method of its manufacture // 2626523
FIELD: ventilation.SUBSTANCE: proposed hollow wide chord fan blade, consisting of a shell made of a sheet of a titanium alloy, and heavy-duty supporting elements rigidly connected to it: plate girder, made of a titanium alloy, and others, made of unidirectional fiber metal matrix material of high composite modulus. Wherein n+1 heavy-duty supporting elements are made in the form of "swallowtail" locks and are placed between the other n heavy-duty supporting elements and on the edges of the blade lock, n-1 heavy-duty supporting elements, made of composite material, have a locking portion formed as a "swallowtail", and disposed within the shell portion in the form of a rod with a constant or gradually narrowing towards the end of the blade quadrangular cross-section, with a side or sides being in contact with the shell and following its shape. All the supporting elements are fixed to each other and the shell through the locking portions by means of diffusion welding at the temperature and pressure, and parts, located inside the shell, are connected with the shell. The plate girder consists of a locking portion made in the form of a "swallowtail" blade lock, made in one piece with a central rod having a box-shaped quadrangular cross-section, columns with a transverse quadrangular cross-section, with sides fastened with a shell and following its shape. Between each column and the central plate girder rod there is a rectangular slot. Each slot is embedded in the locking portion of the side member; in each of these two slots there is a smooth, steel, hardened or cold worked ground tape, and on the plate girder rod there is a smooth, steel, hardened or cold worked ground tape with grooves along the arc of the circle at one side of the tape. In each slot between the smooth tape and the insert strip with the required interference along the corrugation peaks δ>Y∂, where Y∂ is the allowable deformation of the compression of the package corrugation in mm, so a multi-span package, assembled "corrugation into corrugation" from one, two or more steel, hardened or cold-worked ground corrugated tape is placed so that the corrugations of the package resting on the insert tape are placed in its And the tops of the corrugations are supported by grooves in their plane of symmetry, and ƒ≥Y∂+h, where ƒ - the arrow of the crest of the corrugation and h is the depth of the groove of the insert tape. Flanges are made on the free end of the plate girder rod. An insert tape is supported on each flange by a bent end, and a smooth tape is bent to the end of the column and the bent end rests on the bent end of the insert tape so that when the blade oscillates, mutual elastic slippage occurs of the bent ends of these tapes with dry friction. Corrugated tapes of the package, smooth tapes and insert tapes are made of heat-resistant stainless steel, which does not lose its elastic properties at 600°C, and the contacting surfaces of these tapes are covered with a wear-resistant coating that retains its protective properties at this temperature.EFFECT: high strength and static rigidity that persists or accrues during the process cycle, with a highly efficient damping device that reduces dynamic stresses in the blade during impact and vibration to a safe level in all working conditions of the aircraft engine and increases the life and reliability of the fan.11 cl, 9 dwg

Development well ejector unit (options) // 2626487
FIELD: mining engineering.SUBSTANCE: device contains a tubing string fixed in the casing string by wellhead fittings and a supporting packer. This string forms an annular coaxial flow channel with the casing string of the well. There is a jet pump. This pump, depending on the embodiment of the device, provides a direct or reverse circulation pattern. The options of intertubular coaxial flow channel and a jet pump with a branch pipe for taking the formation product are considered. The jet pump in its general form contains a cross-flow coupling with interconnected axial and peripheral longitudinal flow channels. In the axial channel of the coupling there is a nozzle or diffuser, coupled with their mating diffuser or nozzle, forming a formation product supply chamber, connected with the peripheral longitudinal flow channels of the coupling on one side, and with an inlet manifold provided with a check valve on the other side. This valve provides the communication with the producing formation of the well through the channel of the supporting packer, adjacent to the manifold, or the branch pipe of the formation product take, depending on the option of the device. The radial channels of the coupling in one or another location of the jet pump in the well are communicated with the annular or tubular spaces through coaxial flow channels. The axial channel of the coupling on the side opposite to the nozzle or diffusor is blocked by a plug below the level of the radial channels. In the upper part of the jet pump, a locking device is provided for attaching and retrieving it from the well using a catcher.EFFECT: increased level of maintainability of the device and higher reliability of development well operation.4 cl, 6 dwg

Open stage impeller of electric-centrifugal pump // 2626266
FIELD: oil and gas industry.SUBSTANCE: open stage impeller of an electric-centrifugal pump contains a hub that can freely move along the pump shaft, a drive disk with blades, installed on one of its flat surfaces and forming flow channels, and an individual support foot on both surfaces of the disk in the form of an antifriction wear-resistant washer. Along the length of the flow channels, starting from the larger diameter of the disk, cutouts are made, the boundaries of which are in line with the boundaries of the lateral surfaces of the blades in the zone of attachment of the blade to the drive disk. Heightwise, the blade is made up of two parts, at least one of which is inclined relative to the axis of rotation.EFFECT: increased reliability of the impeller when pumping liquids containing mechanical impurities.4 cl, 5 dwg

Fan assembly // 2626213
FIELD: ventilation.SUBSTANCE: water sprinkler contains: the nozzle, having the first air inlet and the first air outlet, the first internal passage for moving the air from the first air inlet to the first air outlet, the second air inlet, the second air outlet and the second internal passage for moving air from the second air inlet to the second air outlet. The nozzle defines the internal opening through which the air from the water sprinkler outside is drawn by the air, emitted from the air outlets; and the main part, on which the nozzle is mounted and which contains the base and the water tank, mounted on the base. The base includes the flow creation facilities to create the first air flow through the first internal passage and the second air flow, through the second internal passage, the tank for receiving the water from the water tank, the converter for spraying the water in the tank, the first air passage for moving the first air flow to the first air inlet and the second air passage for moving the second air flow above the tank and to the second air inlet.EFFECT: ability to achieve relatively compact dimensions, to reduce the number of components and to reduce the manufacturing costs.7 cl, 9 dwg

Flexible-hose mixing pump for pasty substances // 2626193
FIELD: engines and pumps.SUBSTANCE: mixing pump contains an annular cavity along the hose. Working chamber - channel is made of magnetoactive elastomer plastic, energised by running field generator. On the inner surface of the channel, a series of parallel counterpropagating rectilinear projections is made, which ensure a complete overlap of the section, when the pipeline is locally compressed.EFFECT: invention allows to increase the efficiency of transporting highly viscous and pasty substances due to the use of travelling deformation waves of the working chamber-channel, ensuring the movement of the transported material with low shear stress, and the internal relief allows to prevent the reverse movement of the substance.1 dwg

Rotary machine (versions) // 2626187
FIELD: machine engineering.SUBSTANCE: rotary machine of the first version comprises a stationary body 1 with a working chamber, a rotor 3 with a protrusion 8 mounted on the axis 4 and having blades 5 with protrusions 7 mounted on an additional axis 6 located eccentrically about the axis 4 of the rotor 3. The machine comprises a rotary disc 9, which allows the blade 5 to be moveably fixed to the rotor 3 by means of the protrusion 7 of the blade 5 and protrusion 8 of the rotor 3, coupled with the rotating disk 9, and the protrusion 8 of the rotor 3, as well as the window and the working fluid channel located in the housing 1.EFFECT: improved operational properties.9 cl, 15 dwg

Rotary-vane machine (versions) // 2626186
FIELD: machine engineering.SUBSTANCE: rotary-vane machine comprises a stationary housing 1 with an axis 4 connected to an eccentrically located second axis 6, a supply duct 10 and a discharge duct 11 of working medium. Around the axis 6, the vanes 5 are movably arranged. Inside the vanes 5 there is a working chamber 2 divided into two working sections by a piston 9 with a movable piston shaft 8. The shaft 8 is attached to the rotor 3 rotated about the axis 4. The duct 10 passes through the shaft 8. The duct 11 is made in the housing 1 and extends along the working section, providing an increase in the ejection velocity of the working medium.EFFECT: improved operational characteristics with reduction of pneumo-hydraulic and mechanical losses and increased efficiency of the device.7 cl, 19 dwg

Wells multistage pump // 2625607
FIELD: engines and pumps.SUBSTANCE: invention relates to multistage borehole pump. The pump includes a housing 1, a drive shaft 2, rotor 3, the elastic blade 4 and 5 metal rings rigidly connected to the housing 1. Inside the opening of each ring 5 is one of the rotors 3 and 4 blades mounted radially rigidly associated with the ring 5. Each pair of the rotor 3 and the ring 5 is provided with wheels 6, 7, rigidly connected to the rotor shaft 3 and 2 and installed at both ends of the rotor 3. Each disc 6, 7, 8, a through hole 9 located in the area of the blades 4. The openings 8, 9 in the discs 6, 7 on either side of the rotor 3 are arranged diametrically opposite. Each rotor 3 is designed as a cam or single or multi-cam. The rotors 3 are rigidly connected to the shaft 2 and set in different directions in relation to the most remote point from the rotation axis. Each rotor 3 is configured such that the closest point to the axis of the rotor 3 in contact with the blades 4, without deforming them. The distance between the rotor 3 points, most distant from the rotor axis 3 and cooperating with the blades 4 and the closest axis of the rotor 3 is equal to 1/4-1/3 the length of blade 4.EFFECT: elimination of jamming of the blades, increasing the reliability and durability of the device.3 dwg

Submersible displacement pump // 2625420
FIELD: engines and pumps.SUBSTANCE: pump comprises a submersible motor, the motor shaft, kinematically connected to the oil pump drive, protector, volume expansion compensator oil containing diaphragm, oil tank, hydraulic power system with thin oil filter, hydraulic motor, working pump, the compensation unit. Compensator volumetric expansion of the oil pump is disposed above the drive. Under the oil pump drive, there is protecting the motor protector. Compensator volumetric expansion of the oil is provided with two apertures, separated by an additional nipple. Inside the cavity of one of two additional apertures, housing is mounted to define a cavity between the inner surface and the outer surface of the diaphragm housing.EFFECT: use of the invention will improve the reliability, improve manufacturability and performance characteristics of the pump.11 cl, 1 dwg

Pump control including the cleaning or stopping procedure depending on load on engine // 2625413
FIELD: engines and pumps.SUBSTANCE: invention relates to a method of pump means control comprising a pump (2) with an electric motor (7), a motor (7) control unit (6) and means for monitoring at least one operating parameter from which an electric motor (7) load factor, which corresponds to the operating conditions of the pump means. When the pump (2) is in the active state, the electric motor (7) is driven in the first direction. The method comprises the steps of determining a real value of at least one operating parameter, determining whether the externally applied force exerts an influence on the motor (7) to such an extent that a critical operating state for the pump means is initiated, performing a state switching from the active state to the inactive state of the pump (2) if a critical operating state for the pump means is initiated. The state switching is performed by abruptly interrupting by the control unit (6) immediately after determining that the critical operating state of the motor drive (7) has been initiated in the noted first direction by setting the motor (7) nominal rotational speed equal to zero in the control unit (6).EFFECT: method of pump means control improvement by analyzing the load factor of the motor and changing the operation depending on the instant operating conditions and preventing emergency shutdowns performed by the maintenance personnel.15 cl, 7 dwg

Well sucker-rod pump // 2624939
FIELD: engines and pumps.SUBSTANCE: pump contains a cylinder with a suction valve. The plunger is mounted in the cylinder with the possibility of reciprocating motion. On the outer surface of the plunger, closed grooves are marked, the transverse section of which has the form of a truncated inclined plane of a parabola, the symmetry axis of which forms an acute angle with the plunger axis in the direction of pump discharge. The depth of the grooves is not more than 1/20 of the plunger outer diameter. The mechanical impurities filter is made in the form of concentrically mounted pipes. The internal cross-sectional area of concentrically mounted filter pipes is greater than the cross-sectional area between the outer diameter of the inner pipe and the inner diameter of the outer concentrically mounted pipe. The intake of the inner tube is provided with a circular disc mounted perpendicular to the pump axis on the bracket. The length of the outer pipe is such that the disc is inside this pipe. The mechanical impurities preliminary accumulation tank valve is equipped with a L-shaped stop.EFFECT: increased reliability of the pump and its protection against impurities, by applying a filter with a reduced rate of liquid upward flow, reduced leakage in the plunger pair.4 dwg

ethod of cascade start of electrically driven pumps in pressure booster systems with frequency converter as a regulator // 2624933
FIELD: engines and pumps.SUBSTANCE: invention can be used to start the pumps in pressure booster systems, consisting of a group of electrically driven pumps of 0.4 kW and a frequency converter (FC) as controller. The method includes selecting the first start priority pump of the totality of the installation pumps and its start-up from the FC with control according to the characteristics supply voltage - AC frequency. Then the first additional pump is selected, which is the second in start priority, its start with lowering the pressure in the pressure main below the specified using the method of direct start or a semiconductor soft starter, or using the starters with scheme "star-delta", and after start, the pump works in the constant performance mode. Then the second additional pump is selected, which is the third in start priority, it is started with lowering the pressure in the pressure main below the specified from the FC by switching the FC to it from the first start priority regulated pump. To do this, the disconnected from the FC, the first start priority pump is connected after a certain period of time to the power supply network and said time interval is determined by the pump autorotation allowable time as a function of the active power of the pump motor. The pump newly connected to the FC becomes adjustable according to the characteristics supply voltage - AC frequency. Similarly, the other pumps are started.EFFECT: hydraulic impact reduction in the consumer pressure main and the inrush current in the power supply network, eliminating static errors of the control process, caused by pumps switching by changing the controlled pump priority.1 dwg, 2 ex

Concrete pump system and method of use thereof // 2624785
FIELD: engines and pumps.SUBSTANCE: system comprises keystone cutting ring and spectacle plate in conjunction with elevated interfaces with pistons of hydraulic pump cylinders and an outlet port to ensure that the pumped concrete material does not lose pressure and does not flow back into the hopper. The keystone cutting ring is designed to fully block the keystone holes of the spectacle plate when it smoothly transits between the inlet ports of the hydraulic pump during the cycle change, creating a more uniform output stream of concrete, excluding the reverse flow into the hopper and a hydraulic hammer. The control system is designed to coordinate the operation of the pistons of the hydraulic pump cylinders and the cutting ring to maintain the pressure at the dumper outlet and the material flow at a relatively constant level during all parts of the injection cycle.EFFECT: constant flow of concrete or cement material is ensured.20 cl, 66 dwg

Gas-turbine engine vane with profile providing improved aerodynamic and mechanical properties // 2624677
FIELD: engines and pumps.SUBSTANCE: gas turbine engine vane having a plurality of vane sections packed along the radial axis (Z-Z). Each vane section is located along the longitudinal axis (X-X) between the leading edge and the trailing edge and along the tangential axis (Y-Y) between the side of the trough and the back side. The vane sections are distributed according to the rules of longitudinal Xg and tangential Yg distribution, determining the position of their respective centres of gravity with the ratio of the mentioned longitudinal (X-X) and tangential (Y-Y) axes over the vane height extending from the vane leg to the tip of the vane. Each of the mentioned rules of longitudinal Xg and tangential Yg distribution has a change in the direction of inclination between 90 and 100% of the vane height.EFFECT: increased efficiency in the upper part of the vane, improved mechanical characteristics due to reduction of static voltages, without affecting the dynamic characteristics.8 cl, 6 dwg

Self-priming device for rotodynamic pump // 2624420
FIELD: engines and pumps.SUBSTANCE: device comprises a phase-dividing vat. The vat is attached to a pump delivery pipe by virtue of a discharge circulation pipe and to a pump suction tube assembly by virtue of a suction circulation branch, an adjoined to it ejector and a process pipe. A vat cavity is fitted with a crash protection of a tapered semi-sphere form and of a linked against each other lock valve of a quill cylinder form, a rod and a water sponson that are positioned within the directional vessel of a quill cylinder form. A vessel is positioned at the holes in the vat end and at a cap on the common normal axis. A part of a vessel wallside, which is in the vat internal cavity, is porous implemented. A force main is mounted at the top of the vessel lateral face, that is closer to the vessel. The process pipe has an S-shaped formation, and its upward component has a height at which its upside is on one horizontal plane with the conveyed fluid level with which the vat is filled prior to pump actuation. The process pipe upper component is attached to the ejector nozzle cylindrical section by dint of a gas bleeding branch pipe, and its bottom component - to an ejector diffuser section butt end.EFFECT: providing with durable pumpdown in rotordynamic pump suction line.2 dwg

Liquid-packed ring vacuum pump regulating system // 2624309
FIELD: engines and pumps.SUBSTANCE: liquid-packed ring vacuum pump regulating system comprises a vacuum tube 5 with the outputs for the milking apparatuses 6 connection. The vacuum tube starting point is piped into a suction tube 7 of a liquid-packed ring vacuum pump 4. A vacuum tube 5 is accomplished by a stop end and there is an output for the vacuum gage pressure detector element 1 connection in the stop end. The vacuum gage pressure detector element is attached on the opposite end side to the frequency and voltage regulation control block 2 that is plugged into the three-phase AC network by the variable speed controller. The variable speed controller output is connected to an asynchronous motor electrical input 3 the axle of which is linked to the pump rotor axle 4.EFFECT: invention provides the obligatory vacuum gage pressure retention with the simultaneous electric energy consumption adjustment under the milking apparatuses quantity adjustment.1 dwg

ethod of starting and stopping electric motor of pump // 2624305
FIELD: electricity.SUBSTANCE: controller of smooth start comprising a series circuit of the symistor and the load connected to the terminals, driver signal soft start and stop, consisting of a RC-chain comparator amplifier, a voltage source with a form of unipolar pulses generated from the line voltage sine wave rectifier bridge and galvanic separation on optosymistor the invention RC-chain operate with a time constant of 3.2 s, and the signal from the mains supply is formed with a delay of 7.2 ms inclusion T-wave rectifier reverse polarity with each successive portion a voltage characteristic which coincides with the absolute value of the charge voltage and discharge RC-chain.EFFECT: increasing the durability of the pump by reducing the starting current and mechanical loads to nominal values, reducing the cost of creating a water supply system, increasing its durability due to the exclusion of a hydraulic shock.1 dwg

Ventilation unit // 2624158
FIELD: ventilation.SUBSTANCE: ventilation unit comprising a centrifugal rotor (2), a diffuser (4) connected to the centrifugal rotor (2) and comprising the first and the second outlets (6, 7), the outlets are located on opposite sides of the centrifugal rotor (2) and define the blowing channel (5), the centrifugal rotor (2), the first outlet (6) and the second outlet (7) are aligned with each other in accordance with the main axis (X), perpendicular to axis (R) of rotation. The diffuser (4) comprises guiding means (12, 14) to direct the air flow (F) in the blowing channel (5), each first and second flow deflecting means (12, 14) has the first surface (12a, 14a) which is bent so that its concave portion faces the rotor (2). The first surface (12a, 14a) of the first and second flow deflection means (12, 14) is formed by a portion of a cylindrical surface having the main axis that coincides with the rotation axis (R).EFFECT: prevention of vortices formation inside the diffuser.5 cl, 5 dwg
Four-valve high pressure pump // 2624093
FIELD: engines and pumps.SUBSTANCE: device is intended to apply mediums mainly in the automobile industry. Four-valve high pressure pump comprises a drive 2, as well as a pump body 3 and a cylinder 9 with a movable piston 6. Two blocks 10, 11 of the cylinder are positioned at the end faces of the cylinder, passageways 12, 13 pass through these blocks. An inlet opening 24 is provided at the inlet portion 17 of the housing. A channel 22 for mediums connected to the inlet opening 24 extends through the inlet portion 17, wherein return valve 25, 26 is positioned on both sides of the inlet opening 24 joint place and which is connected to the inner space of the cylinder 9 at its opposite ends via passageways 12, 13 of the block 10, 11. The outlet portion 18 is made in a similar manner, but it comprises an outlet opening 27 instead of the inlet opening 24. The inlet portion 17 of the housing and/or the outlet portion 18 of the housing is releasably fixed sideways to the cylinder blocks 10, 11 so that it could be removed without additional dismantling of the pump body 3.EFFECT: pump can be disassembled to smaller, lighter components for transportation.3 cl, 10 dwg

Vibration pump // 2624092
FIELD: engines and pumps.SUBSTANCE: vibration pump comprises a case that involves an elongated central portion 1 and closure heads 2 and 3 with holes 4 and 5 for the fluid medium sucking-up. These holes are equipped with ring valves 13 and 13' that are mounted on the 1 part ends. A vibration pump also comprises magnet spools 7 and 7' which are situated within the case, two swifts 6 and 6' that are mounted on the frame and that form the electric magnet, two rods 9 and 9', two pairs of electric wires 15 and 16 each of which provides the electric power supply of its swift 6 and 6', two elastic shock-absorbing mountings 10 and 10' each of which fixed to its rod 9 and 9', two elastic baffle plates 12 and 12' each of which fixedly attached to its rod 9 and 9' end and forms the suction valve together with the case, two magnetic cores 8 and 8' each of which attached to its rod 9 and 9' end opposite to its swift 6 and 6'. An outlet branch pipe 14 is threaded.EFFECT: pump operating life increase and shifts in productivity limits extension.4 cl, 2 dwg

ethod of power generation by single-stroke engine with external combustion chamber using energy of air compressor in piston compression cavities // 2624076
FIELD: engine devices and pumps.SUBSTANCE: when a single-stroke engine with an external combustion chamber is running, a portion of the air, compressed in the compressor cavities, enters it. At the same time, the engine control system opens the air inlet valve from the compressor cavities of the engine to the turbine. After the turbine, the air is released into the atmosphere. The turbine drives the electric generator. The electric generator of the engine can operate continuously or periodically for charging / recharging the battery.EFFECT: improved conversion efficiency.1 dwg

Device for gaslift transportation // 2623855
FIELD: transportation.SUBSTANCE: device contains the lifting pipe, which has been lowered into the liquid upto the hydraulic fluid intake place and brought out upper the liquid surface. The pipe consists of the lower pipeline (2), the upper pipeline (1) and the submerged container (3) into the liquid with the internal placement of the pipeline (1) lower cut in its bottom part, and the pipeline (2) upper cut - in its upper part. The device includes the gas supply pipe (5) with compressed gas. The pipe (5) is connected to the container (3), forming the gas cavity in the upper part of the pipeline (2). The container (3) can be submerged in the liquid in the depth change range: from the maximum value at which the pipeline (1) height does not exceed the comparable with lifting pipe immersion height the liquid layer height over the lower boundary of the gas cavity in the pipeline (2), upto the minimum height, estimated from the pipeline (1) height, the part determined by the ratio of the cross-sectional areas of this pipeline (1) and the container (3).EFFECT: invention makes possible to reduce the depth of the compressed gas injection by more than two times with the slight increase in the flow characteristic, which makes it possible to use low-pressure injection machines instead of high-pressure ones, to reduce the length of gas utilities and to reduce the operation costs for its maintenance.5 dwg, 2 tbl

Suspensions hydrotransportation unit // 2623673
FIELD: engine devices and pumps.SUBSTANCE: unit contains a vessel with a starting suspension, a centrifugal pump, a water jet elevator and a water jet pump. The unit also comprises a device for separating suspensions into a solid and a liquid phase, which is a series of spiral turns composed of pipes and having an inlet and an outlet. The outlet branch is made in the form of a replaceable divider head with two branches and a tongue. One branch is connected to the suction unit of the centrifugal pump, and the second one - to the central passive nozzle of the water jet pump whose active nozzle is connected to the centrifugal pump injection unit. The unit is provided with a water inlet fitting tangentially connected to one of the spiral turns.EFFECT: creation of a unit that provides high efficiency at low energy costs, reliable operation with a change in the concentration of the solid phase and high productivity, and does not contain wearing rotating parts in contact with the pumped solid phase.3 dwg

Axial force discharge method for multistage segmental pump // 2623634
FIELD: engines and pumps.SUBSTANCE: axial force of a multistage segmental pump is discharged by a discharge device, installed on the shaft after the last-stage runner which is affected by medium pressure drop before the discharge device and after it. The discharge device is designed as a face seal, the secondary seal of which is configured with a design diameter which provides for axial force balance.EFFECT: increased pump efficiency due to reduction of volume losses via discharge without losing a portion of consumed pump power on parasite operating media flow through the pump.2 dwg
Axial flow compressor stage guide vanes // 2623631
FIELD: engine devices and pumps.SUBSTANCE: axial flow compressor stage guide vanes contains a body made with a longitudinal connector, inner semirings and rotary blades, which are installed by their inner journals into half rings. Reciprocal fixation of the semirings is performed by means of a stud with a spring-loaded pin mounted on it, which can be fixed in a recessed position, and a slot with a hole for the pin.EFFECT: invention makes it possible to rigidly connect the semirings of the guide vanes of any stage of the stator of a gas turbine engine compressor having a longitudinal connector, to simplify the assembly and disassembly of the guide apparatus and to improve the processability of the compressor casing.3 cl, 5 dwg
 
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