FIELD: valving systems.
SUBSTANCE: solenoid-operated valve comprises housing (1) with supplying branch pipe (3), piston type servo drive made of piston (6), hydraulic cylinder (7), spring (13), charging opening (14), and relief opening (15) mounted in guiding pipe (16). The face of pipe (16) is overlapped with sealing disk (28) mounted on the bottom of bushing (17). Bushing (17) is made in face (18) of a hollow conical electromagnetic armature. Housing (19) of the armature is located in the zone of action of magnetic space (26). The space is formed by yoke (23) and central ring member (25). The central ring member together with housing (24) define electromagnetic drive of the valve. Outlet branch pipe (3) of the valve is mounted on the face of housing (24) of the electromagnet. The valve has a manual doubler. The manual doubler is provided with axle (31) with sealing members (32) and member (33) for affecting the armature and handle (34) with spring (35). Member (33) is interposed between the faces.
EFFECT: expanded functional capabilities.
7 cl, 5 dwg
The invention relates to valves and can be used for remote and manual control fluid flow through the pipeline with diameters from 6 mm up to 125 mm when the input pressure working fluid from 0.06 to 6.3 MPa.
Known commercially available normally closed solenoid valve with manual override IEA 15/04/151/111/1 (Passport TA 5122-0221-01 PS. The manufacturer RPE "tehnoproekt", Penza) (1), comprising a housing with inlet and outlet nozzles, electromagnet with armature having sealing elements on the side surface and on the end, overlying the valve seat. The anchor is drawn in to the valve seat by a spring, and for opening analogue uses a powerful coil, able to overcome the spring force and the additional force of the preload pressure of the working fluid. Coaxially with the anchor in the casing; the manual override in the composition of the sleeve, the rod with a spring and sealing elements. Anchor analog (1) has a through hole of small cross section, through which the inner end of the anchor effect of the pressure of the working fluid, thus creating an additional force of contraction of the armature to the valve seat.
Significant disadvantages of the analogue of (1) are:
- increased energy consumption due to the lack of servo that can't manage the pressure of the working fluid Bo is its 0.3 MPa and in the pipeline with a conditional pass-section of more than 15 mm;
- large switching time (up to 3 sec) due to the drainage of liquid through the orifice of small cross section and of considerable length in the anchor;
- strong force on the manual control associated with overcoming efforts as springs electromagnet and stock and additional efforts preload anchor pressure working environment.
This substantially limits the applicability of similar (1).
The closest known technical solution is normally closed electromagnetic valve main EN 2277664 C1 (application No. 2004136474/06) (2), comprising a housing with an inlet pipe and an actuator on the end wall, coaxially connected to the valve body housing of the electromagnetic actuator with the discharge pipe on the end wall. The servo prototype comprises a cylindrical housing with a skirt, piston with sealing sleeves and retaining ring on the side surface, and the recoil of the discharge hole with an additional seat on the end surface of the cylinder servo. The end face of the piston has an inlet opening and a sealing ring to the ceiling of the main valve seat. The electromagnetic actuator has a Central ring element, a coil, and the yoke and the armature with the cone surfaces. The anchor has two groups of drainage holes and a sealing disk for which uretrite saddle servo. Between the Central annular element and a yoke formed of a magnetic gap in which create a higher gravity anchors, allowing coupled with the servo control low power in the winding of the electromagnetic actuator when the working fluid pressure up to 2.5 MPa, and when the value of conditional orifice valve to 125 mm
However, there is a need and opportunity to further improve the efficiency of force on the anchor of the magnetic gap in the prototype by changing the design of the anchor and the Central ring element. In addition, the prototype does not provide functions for manual control valve and practically unusable when the working fluid pressure of more than 2.5 MPa.
The technical result of the invention is to improve the efficiency of the forces acting on the armature of the magnetic gap by changing the design of the anchor and the Central ring element, and the empowerment of applications by providing manual control functions along with the location of the remote control valve. This result is guaranteed to perform interacting with the anchor surface of the Central annular element is cone-shaped and the introduction valve of the handwheel in the composition of a rotary axis with the sealing elements, a Cam, handle and recoil spring is different, moreover, attached to the axis of the Cam is placed between the end surfaces of the armature and the actuator, in addition conical anchor, hollow comprising a conical body with an output of the drain hole and the end wall with an inlet drainage holes in the centre of which is a blind guide sleeve with the sealing disc anchor on the bottom and side drainage holes. The sealing disk armature when it overlaps the end of the guide tube with the discharge hole of the servo role saddle servo.
The valve design is shown in figure 1 /cut centerline/, figure 2 shows the design of the hollow disk anchors /top view and bottom view/, figure 3 shows the structure of an axis of the handwheel with the Cam /side view, top view/, figure 4 shows a variant of the axis of the handwheel with the Cam in the form of a ring, figure 5 shows a variant of embodiment of the handwheel /outside view of the valve and the cut-axis/.
The valve 1 includes a housing 1, on the end wall 2 which is located the inlet pipe 3, with the main seat 4 closed annular sealing element 5 placed on the end face of the piston 6 servo. The servo cylinder 7 has a skirt 8 with holes 9 and the fastening elements 10, rigidly secured to the end wall 2. The leakage of the working fluid is between the piston 6 and the cylinder 7 exclude cuff 11, fixed retaining ring 12 on the side surface of the piston 6. The preload piston 6 with the sealing ring 5 to the seat 4 is provided with a spring 13 servo. The boot 14 and discharge 15 holes provide additional servo, proportional to the input pressure working environment, the preload piston to the valve seat 4 /at the blocked hole 15/ and overcoming the force of the spring 13 by the piston 6 when the open hole 15, which is made in the guide tube 16 attached to the end of cylinder 7. The guide tube 16 slides blind guide sleeve 17 anchors placed on the end wall 18 of the anchor. End wall 18 of the armature rigidly connected with the cone-shaped housing 19 of the anchor and has a hole 20 for free or a small pressure drop/ flow of the working fluid when you open the valve. Remote control valve provided with a supply current to the armature winding 21 22 electromagnetic valve actuator formed by the armature, the yoke 23, the housing 24 of the electromagnetic actuator and the Central annular element 25. Between the yoke 23 and the Central annular element 25 is formed of a magnetic gap 26. Due to the paired conical surfaces of the armature, the yoke 23 and the Central annular element 25, the gap between the surfaces of the armature and the yoke 23 with a Central annular element 25 minimum, and set the ü interaction of these elements is maximum, that provides a high force on the anchor when the flow in the coil 22 minimum power. Design anchors disclosed in figure 2, from which the apparent high technology of its production in batch and mass production. The elements 17, 18 and 19 of the armature can be made by stamping or molding with subsequent minimum development size by grinding.
In the absence of current in the winding 22 of the anchor is preloaded by a spring 27 to the end of the guide tube 16 of the sealing disc 28 - hole 15 is blocked and the valve normally closed. The inner cavity of the servo is under the inlet pressure of the working fluid than provided additional to the force of the spring 13, the preload force of the piston 6 to the seat 4. When the flow of current in the winding 22 of the armature overcomes the force of the spring 27 and tightened to the conical surfaces of the yoke 23 and the Central annular element 25 to the working fluid flows from the internal cavity of the servo through the hole 15 faster than flows through the opening 14 of the piston 6 moves away from the seat 4, the opening passage of working fluid through the openings 9, 20 and 29 in the outlet 30. After disconnecting the power winding 22 of the armature under the action of the spring 27 pocketsa sealing disk 28 to the free end of the guide sleeve 16, the pressure in the inner cavity of the actuator is increased to ugodnog the pressure of the working fluid and the piston 6 of the annular sealing element 5 covers the saddle 4 - the valve returns to a normally closed state.
For manual duplication introduced into the valve axis 31 with the sealing elements 32 and element 33 impact on the anchor. On the axis 31 on the outside of the fixed valve handle 34 with the return spring 35. Figure 3 shows the structure of an axis 31. The axle 31 is provided with a stop 36 and the shaft 37 for fixing it handles 34 of the handwheel. By turning the handle 34 is provided effect element 33 on the end wall of the cylinder 7 and 18, as a consequence of the anchor with the sealing disk 28 away from the end face of the guide sleeve 16 to the inner cavity of the actuator is unloaded and the piston 6 with the sealing ring 5 moves away from seat 4 - valve is opened at the time of holding the handle 34 in the new position. After removal of the external influences on the handle 34 with the axis 31 and the element 33 will return to its original state due to the spring 35 is anchored under the influence of spring 27 tightened the sealing disk 28 to the end of the guide tube 16 is the pressure in the inner cavity of the actuator is increased until the input pressure of the working fluid and the valve closes. When the diameters of the valve more than 25 mm, preferably using element 33 in the form of a fork or ellipse, as shown in Figure 4. In this case, provided the withdrawal of the anchor from the end of the sleeve 16 without distortions.
Figure 5 shows a variant of the construct of the main execution of the handwheel and its placement on the body 1 of the valve. The handle 34 has a blind hole, which houses the return spring 35 and the latch 38 /ball/, sliding along the groove with a recess 39 on the housing 1. Between the handle 34 and the sealing element 32 axis 31 posted by washer 40. In the absence of external influences on the handle 34, the ball 38 is located in the recess 39, the element 33 /see Figure 1/ does not affect the position of the end wall 18 of the armature and the valve is determined only by the flow of current in the coil 22 of the electromagnetic actuator. Forced activation /opening/ valve is secured by turning the handle 34 (30-60) angular degrees. Because the force of the spring 27 acting on the anchor is small, and the impact force manual force on the handle 34 when the transmission element 33 is amplified, the proposed variant of the handwheel allows easy opening of the valve turning effects on the handle 34 of the handwheel, which is an additional operational advantage of the proposed technical solutions.
The selection of the ratio of cross sections S29 S20 and anchors within:
S20=(0,5-0,95) S29 is possible to provide a valve open state of the valve by the fluid flow. During the flow of working fluid through the anchor creates a force Fp counter the force of the spring 27 is proportional to difference of pressure P before and after the end wall 18 of the anchor: Fp=S×P F, where S - the area of the end wall 18, F - the force of the spring 27. For example, when F=15 N, S=8 cm2enough pressure difference P>0,187 kg/cm to hold the sealing disk 28, is placed in the guide sleeve 17 of the end wall 18 of the anchor in the pulled from the end of the guide tube 16 and the cylinder 7. The specific value of the differential pressure P depends on the speed of flow of the working fluid through the anchor, and the ratio of cross sections of the holes S20and S29the anchor.
Thus, preserving all the advantages of the prototype (2), the proposed solution provides an additional function manual override opening the valve. In addition, the performance of the Central ring element of the electromagnetic actuator with a conical surface adjacent to the same surface of the anchor, can improve the effectiveness of the power of the magnetic gap to the armature of the electromagnetic valve actuator. In addition, the performance of anchors hollow of two stamped parts improves the manufacturability of the design and reduce the weight of the anchor, which is also important at any position of the valve. It should be noted also additional technological advantage of the proposed variant of the magnetic gap 26 is more simple and reliable protection of the winding 22 from exposure to the working environment as a consequence offer the aqueous versions of the magnetic gap in the electromagnetic actuator. Indeed, compared to the prototype (2) the gap between the yoke 23 and the Central annular element has considerable depth and can be sealed with a compound, capable of withstanding the pressure of the working fluid to 6.3 MPa.
Compared with the serial analog (1) the proposed valve is operable in a wide range of pressures of the working environment, when used for pipelines with diameters up to 125 mm, with switching time less than 0.5 seconds and lower (5-6) times the power consumed by the winding of the electromagnetic actuator.
The proposed solution can be used in the design and manufacture of valves for the working fluid pressure of 0.06 MPa to 6.3 MPa for pipelines with diameters from 6 to 125 mm
1. The electromagnetic valve with manual override, comprising a housing with a front wall, where the inlet pipe with the main valve seat and the actuator comprising a cylinder with a skirt and discharge, springs, piston with sealing sleeves and retaining ring on the side surface of the sealing ring and the loading opening, placed on the end face of the piston, and an electromagnetic actuator comprising a conical disk armature with two groups of holes connected coaxially with the valve body housing the electromagnetic who itogo drive, members of the electromagnetic actuator yoke and ring Central element and formed their magnetic gap, and a return spring and is placed on the armature winding, the protective layer of the winding, and the discharge hole of the servo overlaps the sealing disk on the end face of the armature, characterized in that the valve introduced the manual override, containing an axle element impacts on the anchor and the sealing elements, the handle and recoil spring, and available on the axis of the element effects on the anchor is placed between the end surfaces of the armature and servo.
2. The valve according to claim 1, characterized in that the element impacts on the anchor is made in the form of a fork.
3. The valve according to claim 1, characterized in that the element impacts on the anchor is made in the form of the Cam.
4. The valve according to claim 1, characterized in that the element impacts on the anchor is made in the form of a ring.
5. The valve according to claim 1, characterized in that adjacent to the anchor surface of the Central annular element is made conical.
6. The valve according to claim 1, characterized in that the conical disk anchor hollow part of the housing with the output of the drainage hole and the end wall with holes in the centre of which is a blind guide sleeve with the sealing disk on the bottom and lateral drainage open the s, and inside the guide sleeve anchors placed connected with the cylinder of the servo guide tube with the discharge hole, the end of which serves as a saddle servo.
7. The valve according to claim 1, characterized in that the handle of the handwheel has a blind hole, which houses a return spring and retainer, such as a ball and the valve body is made a groove for the retainer with a recess, into which falls the latch in the initial position of the handle of the handwheel.
8. The valve according to claim 1, characterized in that the gap between the yoke and the Central annular element is sealed with a compound that performs the role of a protective winding element.
FIELD: chemical and petrochemical industries.
SUBSTANCE: invention is designed for control devices of electric drives of valves, cocks, gates in transportation of oil and oil products. Proposed valve electric drive control device has optomechanical position sender and contactless voltage switch. Torque unit is made for calculating torque on shaft of induction motor as function of stator current of induction motor in electric drive, rotor speed, and current frequency, with possibility of calculating torque at output of electric drive transfer mechanism according to relationship M=Kt x Mim where M is torque at output of electric drive transfer mechanism, Kt = α x Kr, Kt is torque gain factor, α is correction factor taking into account state of electric drive and type of transmission, Kr is transfer ratio of transfer mechanism, Mim is torque on shaft of induction motor, with possibility of setting maximum torque at output of electric drive transfer mechanism. Rotor speed of induction motor for torque unit is found by readings of optomechanical position sender.
EFFECT: simplified design, reduced overall dimensions, increased reliability.
FIELD: mixing equipment.
SUBSTANCE: invention relates to equipment of medical institutions and is designed for use in household water supply appliances, in train cars, in passenger air liners and in production devices for mixing two and more liquid components. Proposed mixer has housing with two inlet and one outlet branch pipes, and shutoff members with rods. Two noncontact proximity sensors and electromagnets of number corresponding to number of inlet branch pipes are introduced into device. Cores of electromagnets are coaxially connected with rods and shutoff members. Hand drives are furnished with rod locks. Electromagnets are supplied through power switches controlled by proximity sensors introduced into device.
EFFECT: improved convenience of use of water dispensing devices, enlarged functional capabilities at provision of contactless control of device.
5 cl, 7 dwg
FIELD: electrical engineering; mechanical engineering.
SUBSTANCE: invention relates to design of controlled electric drivers, namely, controlled multirevolution electric drives with induction motors. Invention is aimed at simplifying design of power train of controlled electric drive and provision of universality of assembling, improving mass-dimension characteristics of controlled electric drive in one type-size at simultaneous increase of loading capacity and reliability of controlled electric drive and provision of high values of torque and speed output parameters at preservation of high efficiency. According to first and second design versions, electric drive contains flanged induction motor, induction motor control unit and power gear train arranged in common case and made on base of planetary transmission of one planet pinion or multiplanet pinion make. Power train includes also input shaft-carrier mechanically coupled with output shaft of rotor of electric motor, fixed sun gear secured in housing, output movable sun gear installed in housing and rigidly coupled with output shaft, one, or two, or three, or four double-rim planet pinions installed on shaft-carrier on bearings. Parameters of gear trains are provided in invention.
EFFECT: simplified design.
12 cl, 3 dwg
FIELD: pipeline engineering.
SUBSTANCE: electric drive comprises three-phase asynchronous motor with shortened rotor, transmitting mechanism, and optical-mechanical transducer for determining position of the output link of the transmitting mechanism. The electric drive has the torque unit made for permitting calculation of torque as a function of current in the stator of the asynchronous electric motor, speed of rotation of the rotor, and current frequency as well as for permitting control of limit torque. The first input of the unit is connected with the stator winding of the asynchronous electric motor through the current transducer. The second input of the unit is connected with the optical-mechanical pickup of position of the output link of the transmitting mechanism. The controller of the position of the outlet link has the first input for control of limit position, second input connected with the optical-mechanical pickup of position, and output. The electric drive is made for permitting determination of the speed of rotation of the asynchronous electric motor for torque unit from the readings of the optical-mechanical pickup of position.
EFFECT: simplified structure, reduced sizes, and enhanced reliability.
6 cl, 3 dwg
FIELD: mechanical engineering.
SUBSTANCE: device comprises electric motor, blocking unit, planet reduction gear, and manual doubling worm drive. The worm of the drive engages the teeth on the outer surface of the central wheel of the reduction gear. The unit of end switches is kinematically connected with the output shaft of the device. The device is provided with the arrester of the maximum torque which comprises two levers with microswitches pivotally mounted on the bearing plate, stops, and spring interposed between them. Two adjusting cams are mounted for permitting rotation, locking, and cooperation with the pushers of the microswitches. Two blocking cams are mounted for permitting rotation at an angle no more than 180° at complete stroke of the output shaft of the device. There are two rockers. Under the action of the spring two levers are pressed to the arms of the appropriate rockers. The arms of the rockers are mounted for permitting engagement with the worm of the manual actuator. The worm of the manual actuator is mounted for permitting axial movement along the shaft of the manual actuator and provided with springs that are arranged from its both sides on the shaft of the manual actuator and arrest the movement of the worm. The blocking unit is made of a mechanical brake that comprises clutch member, braking disk, and friction disk. The clutch member is mounted on the input shaft of the reduction gear. The braking disk is connected with the input shaft and pressed to the friction disk with a spring. The spring and input shaft are axially aligned. The face of the braking disk is provided with hollows. The hollows receive balls that provide engagement of the clutch member with the braking disk.
EFFECT: enhanced reliability and precision.
4 cl, 3 dwg
FIELD: oil-chemical industry.
SUBSTANCE: electric drive comprises external drive and gearing with intermediate rolling bodies. The gearing has input shaft and cam which is mounted on the input shaft and made of three same disks. The disks are secured to the bases so that their centers are arranged symmetrically around the axis of the input shaft. The electric drive comprises central wheel with inner teeth and separator. The grooves in the separator receive three rows of intermediate rolling bodies that kinematically connected with the cam and central wheel. The input shaft of the gearing with intermediate rolling bodies is secured to the external drive. The input shaft is mounted in two rolling bearings. One of the rolling bearings is made of intermediate rolling bodies.
EFFECT: enhanced reliability and simplified structure.
FIELD: oil producing industry.
SUBSTANCE: invention relates to control valves to be used at completing of wells, particularly, to control valve with drive to control its state and, by means of this, state of main valve used in well in which state of control valve is controlled by drive.
EFFECT: optimization of flow and control.
24 cl, 4 dwg
FIELD: pipeline armature engineering, possible use in devices with remote control over working substance flows in main transportation systems for them.
SUBSTANCE: electromagnetic valve contains body with inlet and outlet branch pipes, electromagnetic drive with control winding, lower and upper heads, main valve and pilot valve. Main valve is made in form of a piston with forcing aperture and flow channels. Pilot valve is controlled by pressure of above-piston hollow of the main valve. The main valve is made of magneto-soft material, and is an element of differential magnetic system of electromagnetic drive and contains a rod in the center of the piston. A recess is made on the rod. The recess is forced into the zone of lower head during opening of main valve. In the moment of insertion into the zone of lower head the recess ensures change of direction of magnetic flow over the pole and fixation of plunger when the valve is fully open. The pole is made on the lower head on the side of main valve. An aperture is made in the central rod of main valve in axial direction. A pusher is mounted in the aperture with organized working space. The pusher provides control over the slide of the pilot valve.
EFFECT: improved magnetic system of electromagnetic drive of valve, stable fixation of locking organ of main valve and prevention of forced oscillations.
FIELD: instrumentation engineering.
SUBSTANCE: circular passage is made in monolithic blank in form of bath where non-magnetic ring is placed; ring is preliminarily divided into equal parts which are rigidly secured and are connected by welding. Similar clearances are checked and joints are made by vacuum soldering. Non-magnetic ring magnetically divides body over perimeter of conical surface into two parts forming equal areas of surface; side walls of non-magnetic material are located orthogonally relative to this surface. Proposed method ensures enhanced reliability of connection of two parts of electromagnetic valve body by vacuum soldering through non-magnetic ring, thus providing for electromagnetic isolation for enhancing magnetic action on armature.
EFFECT: enhanced reliability; reduced usage of metal.
2 cl, 3 dwg
FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: invention relates to fuel equipment for metering and injecting fuel into internal combustion engine. Proposed electromagnetic metering valve for internal combustion engines is essentially hydraulic valve driven by quick-acting electromagnet operating at impulse mode and having two stable positions, namely, completely open and completely closed, in which metering of fuel is performed by changing time of open state of valve whose duration is directly related to duration of control electric pulse supplied to winding of nozzle electromagnet. Holes of equal diameter are made in shutoff-control plate, holes being non-uniformly arranged over plane of fitting to end face of solenoid and seat of valve.
EFFECT: increased speed of response of electromagnetic metering valve.
FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: proposed valve contains body with electromagnetic drive with housing of electromagnet and shutoff device. Shutoff device includes gate in form of plate made of ferromagnetic material, and seat. One side of gate points to stop made of form of projecting bead on end face of electromagnet housing, and other side points to seat made of paramagnet material with sealing surface in form of bead separating gas supply space from gas feed space. Seat is separated from electromagnet housing by bushing with uniformly spaced holes to pass gas. Two ring grooves are made on sealing surface of valve seat. Inner groove is constantly connected with gas supply space by channels, and through end face clearance between gate and seat, when valve is open, with gas feed space and simultaneously with outer ring groove. Outer groove is connected through end face clearance with gas supply space and simultaneously is constantly connected through channels with gas feed space. Gate in form of plate is suspended on two extension springs. Lower spring exceeds upper spring in force.
EFFECT: improved mass-dimensional characteristics of valve, reduced power consumption, improved operation reliability.
2 cl, 1 dwg
SUBSTANCE: valve comprises housing with inlet port, outlet port, seat, and movable valving member or control member. The member is connected with the pulse drive through the flexible impermeable member. The valve is provided with additional pulse drive mounted inside the housing, two devices for converting and reducing the pulse reciprocation into interrupted forward motion or rotation, or curved motion. The converting devices are connected with the valving member, control member, and pulse drives through flexible impermeable members.
EFFECT: enhanced reliability and prolonged service life.
FIELD: remote control devices, which operate pneumatic cylinders of transit vehicle doors to prevent unauthorized door opening and to provide priority of door closing with the use of electric power.
SUBSTANCE: device comprises four replaceable three-way pulse electropneumatic valves with inlet, outlet and drainage orifices arranged at base of each valve body. After connection of all electropneumatic valves the orifices create vent channel communicated with hole made in connection panel and communicating with atmosphere. The connection panel comprises two panels fastened one to another in air-tight manner and having pneumatic channels in contact surfaces.
EFFECT: increased reliability, reduced power inputs, possibility to retain functional and structural interchangeability.
6 cl, 6 dwg
SUBSTANCE: valve comprises housing with the main seat, supplying and discharging branch pipes, and housing lid with solenoid drive that is secured under the lid. The solenoid valve has winding, protecting member for the winding, armature, central rod, armature with sealing disk on the face, and return spring. The valve has servodrive made of cylinder with charging and discharging openings and control seat. The housing is made of hollow cylinder with face that is detachably connected with cylinder and provided with supplying branch pipe and main seat. The cylinder of the servodrive is secured to the face from inside. The face of the piston has charging opening and sealing ring. The armature of the solenoid drive is made of disk provided with two groups of drain openings and provided with the nonferromagnetic centering bushing. The core of the electromagnet is made of hollow rod and is rigidly connected with the face. The yoke is made of ring and arranged over the periphery of the lid and housing of the valve. The outlet branch pipe of the device is secured to the lid of the valve coaxially with the opening of the central rod of the electromagnet.
EFFECT: simplified structure.
4 cl, 1 dwg
FIELD: fluid-pressure actuators.
SUBSTANCE: flow regulator comprises housing (1), seat (7), and valve (5) made of a sleeve coaxially mounted in sleeve (4) secured in housing (1) with a guaranteed spaced relation that represents hydraulic throttle (19). Ring passage (8) is defined between the inner surface of housing (1) and outer surfaces of valve (5) and second sleeve (4). The passage is in communication with hydraulic throttle (19), and space (9) between valve (5) and second sleeve (4) is in communication with hydraulic throttle (19) and space (11) downstream of the seat through pulse passage (14) and nozzle (12) with gate (15) that moves under the action of solenoid (18) or push button (17), or with small cock (20) through branch pipe (21) and pulse passage (22).
EFFECT: improved structure.
1 cl, 1 dwg
FIELD: pipeline valves and fitting.
SUBSTANCE: proposed electric drive contains electric motor with gear wheel on its shaft and worm reduction gear with output shaft. Gearbox is made of light alloy. Steel cup with beat is installed in gearbox housing. Single-row thrust is installed in cup. Bearing is covered by steel washer pressed to cup by ring flange. Cover is fitted on ring flange. Races of thrust bearing are freely fitted with clearance on shaft of worm and in cup. Races of bearing are installed freely with clearance at end faces between cup bead and steel washer.
EFFECT: increased load carrying capacity, enlarged operating capabilities of electric drive.
2 cl, 4 dwg
SUBSTANCE: controlled valve has housing with inlet and outlet branch pipes and pipe for recirculation of fluid.
EFFECT: simplified design and enhance efficiency.