Fan for local ventilation of wells |
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IPC classes for russian patent Fan for local ventilation of wells (RU 2509894):
        
 Air bleed device, compressor stage with said device, compressor with said stage, and turbojet with said compressor / 2467209
Proposed device comprises moving wheel with moving vanes and stationary wheel with fixed vanes. It comprises also moving wheel manifold for collection of airflow sucked off moving vanes and stationary wheel manifold to collect airflow forced onto fixed vanes. Moving wheel manifold is located on compressor stage casing outer edge, opposite the moving wheel. Stationary wheel manifold is located above moving wheel manifold.
 "maxinio" standard technology of vehicle manufacturing and operation, no-run take-off and landing electric aircraft (versions), lifting device, turbo-rotary engine (versions), multistep compressor, fan cowling, turbo-rotary engine operation method and method of electric aircraft lifting force creation method / 2457153
Set of invention relates to aircraft engineering. In the first version, no-run take-off and landing electric aircraft contains fuselage (1) with pillars (3) and helical fan in cowlings (2), lifting planes and chassis. Turbo-rotary engines (4) have generator units of the first and the second screws connected by electric circuit with electric motors (12,13) of the first (23) and the second (28) screw respectively of screw fan (11) installed on the front upper pillar (10). In the second version, no-run take-off and landing electric aircraft contains fuselage with upper and lateral pillars with fork at the end. In the fork of front upper pillar (10), turbo-rotary engine (4) with generator units having rotors on shafts of screw fan screws is installed, and in forks of front lateral pillars (48), electric motors (50) driven fans (49) are installed. Invention also covers lifting device, turbo-rotary engine, multistep compressor, fan cowling, turbo-rotary engine operation method and lifting force creation method.
 Gas turbine engine birotary screw fan / 2439376
Birotary screw fan comprises structural ring of rear suspension and rear bearing housing. Note here that said structural ring is jointed with rear bearing housing flange wherein
 Impeller of axial fan / 2422681
Holes are made in the hub located at an angle of 90 degrees to its axis as per the number of blades; pin is fixed in each hole; slot for arrangement and turn of the base is made in each pin; each rotation axis is installed in the holes made in pin on opposite sides of the slot and passes through the slot; springs are made in the form of torsion springs arranged on axes of bases; at that, one free end of each spring is connected to the pin, and the other end is connected to the base, and edges of pins protruding to outer surface of hub are made in the form of cylindrical surface coaxial to hub, the diameter of which is equal to outer diameter of the hub.
 Birotary screw-type blower / 2367823
Invention relates to aircraft engine production, particularly to blowers of aircraft gas turbine engines. Proposed screw-type blower comprises 1st and 2nd turbine wheels arranged one behind the other and furnished with vanes running in disks relative to radial axes. Front edges of the 1st turbine wheel vanes feature a departure from radial rotational axis increasing from the hub to periphery to create the vane sweep forward. 2nd turbine wheel vane front edges feature a departure from radial rotational axis decreasing from the hub to periphery to create the vane sweep forward. Birotary stew-type blower can be cowled.
 Birotary srew-type blower / 2367822
Invention relates to aircraft engine production, particularly to aircraft gas turbine engine blowers. Proposed birotary blower consists of two consecutive impellers running in opposite directions. To produce required profiles of both impellers, necessary distributions of blades angles are corrected by algebraic summation of their designed angles. Birotary screw-type blower can be cowled.
 Method of increasing efficiency of axial multi-stage compressor operation / 2359160
Invention relates to compressor production and can be used in, for example, gas turbine plants incorporating axial multi-stage compressors. The proposed method comprises injecting water into, at least, two compression stages that allows maximum increase in efficiency of the axial multi-stage compressor along with minimum water flow rate. The above effect is provided for by a mathematical expression to calculate the compressor efficiency that allows for steam content and steam enthalpy in air behind the compressor, and to calculate the optimum amount of water injected into the compressor stages required for the said increase at preliminary stages of compressor operation.
 Compressor housing (versions) and compressor impeller blade / 2247867
Proposed housing of compressor includes axially convex inner surface located around row of impeller blades with radial clearance between surface and blades. Edges at tip of blades add to housing contour, thus reducing losses on ends at blade tips and blocking of flow.
 Axial multi-stage compressor of a gas turbine engine / 2243418
The invention relates to compressors of gas turbine engines ground-based and airborne applications
 Multistage compressor of gas turbine engine / 2235913
The invention relates to compressors of gas turbine engines for aircraft and ground applications
 Pipeline for end cut ventilation / 2505679
Pipeline for end cut ventilation includes air intake, suction path tubes and devices for their joints connection. To increase the reliability and simplify its maintenance the air intake is made extension-type from several sections reducing in diameter towards the suction end. Note that air intake is mounted at the face end of the suction path. The devices for connection of the suction path pipe joints between themselves and air intake are made in the form of socket-and-spigot connections and quick-releasing clamps from flexible material embracing their joints.
 Method to ventilate systems of mines / 2491424
Method includes control of aerodynamic resistances of crosscuts or drives, which is carried out by installation of draught sources of oriented action that do not prevent movement of mine transport in crosscuts or drives, apart from the first one. While providing for even air distribution in crosscuts or drives, depressions of draught forces are determined from the expression given in the description text and claims. Action of draught sources is oriented depending on the sign of their rated depressions. Finishing of air flow rates in crosscuts or drives to the specified mode is arranged depending on the calculated depression.
 Mode of operation and device for ventilation of road tunnels / 2487245
On the route of tunnels at certain distances from the input and output portals the exhaust ventilation shafts with dust cleaning units and gas turbine mini-thermal power stations are additionally located. Supply of most of fresh atmospheric air to the tunnels and removal of contaminated air from the tunnels is carried out due to exhaustion created by the air compressors of additional power gas turbine units. Gas turbines are used for electrical power generation. The heat of the exhaust combustion products is recovered in the recovery-boiler, thermal energy is generated and used for heat supply of buildings. The products of combustion after the recovery-boiler are released through the chimney into the atmosphere and harmful gas components of the combustion products are dissipated at a height of 60-80 metres. Simultaneously with the ventilation of tunnels the electric and thermal energy is generated and it is delivered to consumers. Harmful gas components of the combustion products are dispersed in the atmosphere at a height of 60-80 metres.
 Method of determining dynamic work of body displacement by variable force in air / 2486342
Body is arranged in heading entry to measure its weight. Stationary air medium is arranged in heading to make said body moving in air medium. Body motion velocity and medium velocity of displacement relative to moving body are measured. Specific density of air flow rate and body motion aerodynamic force in air are measured. Preset force and period of its action are measured to define preset force pulse and to measure preset velocity of medium. Then, maximum deviations from preset values of force pulse and medium velocity are defined. In case there deviations, their appropriate magnitudes are set at entry. Medium force pulse and velocity are varied. Force pulses and specific densities of air flow rate corresponding thereto are measured at heading entry to define force variations conditions and initial dynamic work of the body. Dynamic work of body displacement in air is defined at heading entry at variable pulse, specific density of air flow rate and various variation conditions by enclosed mathematical formulae.
 Pipe from fabric reinforced by polyvinylchloride / 2485320
Pipe from fabric reinforced with polyvinylchloride for suspension under a tunnel ceiling or similar, comprises an inner and an outer cover from polyvinylchloride. At the same time the inner cover is made from black electroconducting polyvinylchloride, and the outer cover - from white electric insulating polyvinylchloride. Besides, the pipe is equipped with an external longitudinal strip from black electroconducting polyvinylchloride, which is in contact with the inner cover. Besides, the specified strip is grounded with the help of the suspended system from the pipe to the mine ceiling.
 Optimised mine ventilation system / 2480588
Optimised mine ventilation system operates on the basis of a forecasting dynamic imitation model of a mine ventilation network together with a simulated instrumentation equipment, for instance, fans and controllers of an air flow. The model always achieves an air mass balance, where pressure and density is preferably compensated by depth and values of discharge flows of natural ventilation as a result of temperature difference. Reference points of the model are monitored for reliable connections and are sent to actual physical equipment of control via a base control system.
 Method to ventilate blind pits and coal mines / 2478791
Method includes use of control devices. At the same time a control device is installed in a blind pit neck in the form of a metal triangular pyramid with gates of louvre type with flow-guiding sections added along with development of the blind pit, which may redistribute and send at any moment of time the required portion of general mine ventilation air for ventilation of the blind pit without installation of an additional source of draught. At the same time gates are moved with a controlled pneumatic drive in a horizontal plane.
 Method of air heat supply of ventilation in underground mines of mining enterprises / 2478790
Method includes burning of fuel and removal of combustion products along a gas line via a heat exchanger and a smoke exhaust into atmosphere. A blast fan is installed at the inlet to the heat exchanger, with the help of which in the heat exchanger and at its outlet permanent higher pressure is maintained, and heated air is sent along the line to a pre-mixing chamber. Heated air arrives into the mixing chamber along the line, and atmospheric air arrives via a controlled valve, and total flow of ventilation air is sent to a ventilation shaft. Using control, instrumentation and adjusting equipment parameters of air flows are monitored, pressure is changed, as well as temperature and flow rate of air flows. In case of emergency valves 13 and 15 are opened to atmosphere, and valves 10 and 12 are closed.
 Method for mining operations in series of highly gaseous coal seams / 2477794
Method includes simultaneous coal extraction at upper and lower seams with advancing the broken working at upper seam and coal transportation to skip shaft from all longwall faces of worked-out seams of series. Penetration of vertical transportation blind pits from grouped field haul roadway to conveyor cross-cuts of all longwall faces is done at series travelling side. At series ventilation side there are vertical ventilation blind pits from grouped field ventilation roadway to ventilation cross-cuts of all longwall faces creating pyramid-shaped network of mines connected between themselves from lower to upper seam. The descending air stream from all series longwall faces is directed to ventilation bore through grouped field ventilation roadway made in the roof of upper seam. With the help of bulkheads with holes mounted in pyramid-shape network of mines there provided is a diagonal movement of air streams in the pyramid with exhaust of methane-air mixture from outgoing longwall faces and mines areas and formation of general mine ventilation air stream for extracting methane to the mine surface.
 Shaft ventilation plant / 2473808
Shaft ventilation plant comprises a working and a reserve fan, every of which has an electric motor, a rotor, supports of which are radial and radial-thrust bearings, a header, a diffuser, a doubled input box with vertical air supply in the form of coupling of individual boxes of working and reserve fans, on the common rib of which a dump door installed, which in turns closes entrances of fans, outputs of which are closed with a flag door. At the same time the common input box is made by coupling of individual boxes of fans in a horizontal plane, is installed on a separated foundation by means of elastic elements and comprises gates with drives and nozzles of dissolution-reverse.
 Ventilation pipeline / 2244130
Pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.
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FIELD: mining. SUBSTANCE: fan includes two basic modules of the first and the second stages adjacent to each other by a connection box-type insert so that each module includes a housing, an electric motor, an impeller installed immediately on the electric motor shaft. Impellers of the first and the second stages are made as per a counter-rotation scheme as all-welded impellers with non-rotational double plate blades of S-shape with a variable along the impeller radius by a geometry calculated by means of a single vortex method as jointly operating without any directing vanes based on minimum acoustic power (noise) of the fan, maximum efficiency, pressure and capacity. EFFECT: creation of a fan for local ventilation of wells, which has improved aerodynamic characteristics and provides a possibility of a reversing operating mode at change of rotation direction of impellers and reduction of mass-and-dimensional characteristic of the fan. 10 dwg
The invention relates to the mining industry, mine, mine ventilation and ventilyatorostroeniya, namely axial fans for local ventilation of mine workings. The prior art axial fans local ventilation ["product Catalog" Tomsk Electromechanical plant. CENTURIES Vakhrusheva, 2006], comprising a housing that is built into the hub, explosion-proof motor, one or more impellers mounted on the shaft of the motor, the intake manifold and the nozzle for attaching rigid or Flex. Also known fans of the longitudinal acceleration, ["product Catalog" JSC Kurgan machine-building plant "Vinprom"], comprising a housing with guides and straightening apparatus, explosion-proof motor, one or two working wheels, protivopravnoe device, and the collector COCOM and safety bars, rails. The fan has a modular design, made by high-pressure aerodynamic schemes with meridional flow acceleration. The disadvantages of fans are their low aerodynamic characteristics, including pressure produced, the performance (air supply), large weight and size characteristics and the absence of the possibility of the activity of the reverse mode of operation. In these fan impellers are installed or used on the principle of counter-rotation, so they have low feasibility and high physical specifications. The closest in technical essence to the claimed are local ventilation fans, which can operate on the principle of counter-rotation, for example, the type fans del...GF firm "Zitron" ["local ventilation Fans" NGOs "Engineering", p. 24 and 25], which includes two modules, each of which contains a motor placed on its shaft impeller with specialized blades, which is taken as a prototype. These fans have insufficient capacity, pressure and efficiency, and do not provide a reverse mode, i.e. changing the direction of air flow. Solved technical problem is the creation of a fan of local ventilation shafts with high aerodynamic characteristics (pressure, performance, and efficiency), reduced weight and size parameters, as well as providing a reverse mode of operation. This task is solved by the fact that according to the invention a fan of local ventilation shafts are made of two paired connection Cabinet box base modules of the 1st and 2nd when upena, such that each module includes a housing, a motor and impeller, respectively, 1-St and 2-nd stage mounted on the shaft of the motor, while the impellers 1-St and 2-nd stages calculated and set on the principle of counter-rotation and perform with non-welded double leaf blades S-shaped form with a variable radius of the impeller geometry, calculated by the method of discrete vortices" as working together without directing vanes from the condition of the lowest acoustic power (noise) fan, the highest efficiency, pressure and performance. Two local ventilation fan, made for the counter-rotation of the impeller shown in figure 1. Figure 2 and 3 shows the layout of the base modules, respectively, the first and second speed fan with input boxes for the supply of power to the motors and transport sled. Figs.4 and 5 show cross-sections 1-1 basic modules of the first and second stages of fan impellers and motors. Figure 6 and 7 shows the geometry and arrangement of impeller blades containing an S-shaped double leaf blades and rib connection sleeve fan with his body for the first and second stages of the fan. On Fig shown with the value of II-II of mutual arrangement of the impellers of the first and second speed fan, containing an S-shaped double leaf blades with the directions of their rotation in normal and reverse operation, and with the directions of air flow. Figure 9 shows the design of impellers with the specified directions of their rotation: ωn- normal operation, ωp- reverse mode, and air supply: Qn- normal operation, Qp- reverse mode. Figure 10 shows the calculated aerodynamic characteristics of the reversible fan counter-rotation with a diameter of 1200 mm at the frequency of rotation of the impeller from 750 to 1500 Rev/min Where: 1 - the module of the first stage fan; 2 - module of the second stage fan; 3 - impeller of the first stage fan; 4 - impeller of the second stage fan; 5 - motor shaft of the first stage fan; 6 - motor shaft of the second stage fan; 7 - body and sleeve of the first stage fan; 8 - body and sleeve of the second stage fan; 9 - flat ribs connecting the housing and the sleeve corresponding speed fan; 10 - input box corresponding speed fan; 11 - transport rails; 12 - non-dual leaf blades impeller appropriate speed fan; 13 - Cabinet insert. Two local ventilation fan, made by schemes of the counter-rotation of the impeller (figure 1, 2, 3, 4, 5)contains two basic module with impellers: the module of the first stage 1 impeller 3 and the module of the second stage 2 impeller 4, United Cabinet box 13. The impellers of the first and second speed fan placed respectively on the shafts of the electric motors 5 and 6 of the first and second speed fan installed in the sleeve 7 and 8, the first and second stages of the fan. The case and sleeve, 7 and 8, each base module are interconnected by flat ribs 9. In the layout of each base module includes an input box 10 to supply power to the motors and transport carrier 11. The impellers 3 and 4 are fully welded with non-dual leaf blades 12 (6, 7) S-shaped special geometry, calculated by the method of discrete vortices" as in a live QHand in reverse-QPmodes for increased aerodynamic performance of the fan from the condition of the lowest acoustic power (noise). Design of impellers with non-welded double leaf blades S-shaped, with variable radius of the impeller geometry, two-stage version of the fan, working on the principle of counter-rotation, allows you to increase productivity, pressure and efficiency by 15÷20%, will provide reversionist mode by changing the direction of rotation (figure 4, 5, 6, 7, 8, 9), and also to reduce the weight and characteristics of the fan. To improve aerodynamic performance and efficiency as in a live QHand in reverse-QPthe modes of operation of the fan, through the elimination of pressure losses in blade rows of a straightening apparatus of the fan is made for the counter-rotation of the impellers of the first and second stages, which significantly simplifies the design of the fan and reduces its weight and size characteristics by excluding from the device intermediate directing vanes. However, the performance of the reversing mode - QPwhile changing the direction of rotation of the impeller 1-St and 2-nd speed fan with ω in-ω reaches 90% of capacity direct mode QH, it also reduces the swirling air flow for the second impeller, which increases the efficiency of the fan reaching 0,85. To prevent contact arcing tripping all the steel blades of the impeller of the fan housing connection Cabinet box 13 on the inner side in the planes of rotation of the impeller is covered with sheets of aluminum or brass alloy, and can be equipped with a silencer. Fan of local ventilation shafts works as the way. During normal operation, the motor speed fan to rotate in the direction ω, with a frequency of, for example, impeller diameter, 1200 mm 750÷1500 rpm To regulate its performance frequency of rotation of the impeller ω can be adjusted within these limits, however, his performance will vary (Fig. 10) from 13 m3/s up to 38 m3/C. When you reverse the fan mode (see figure 10 "Reverse") by changing the direction of rotation of the impeller-speed fan on the back to ω=750÷1500 rpm fan will provide a change of direction of air flow (see Fig.7 "Reverse"), while its performance in the reverse mode reaches 85-90% of the performance of the normal mode. Figure 10 shows the aerodynamic characteristics of the reversible fan BM3-2(1)-1200SP, calculated on the basis of the results of bench tests of the fan with S-shaped blades, impeller diameter 700 mm, where indicated: ω and-ω is the rotation direction for forward and reverse operation of the fan; QH, -QP- performance fans in the normal and reverse modes; Rmax, Rmin- maximum and minimum resistance of the duct (ventilation system), which operates the fan;P Sand ηS- static pressure and static efficiency of the fan. For a range of speeds during normal forward operation of the fan within ω=750÷1500 rpm, reversible work ("reverse") within ω=-750÷-1500 rpm in direct mode (normal) work on the network from Rminto Rmaxprovides performance from 13 m3/s up to 38 m3/s in the reverse mode from -12 m3/C to -37 m3/s, and the pressure (vacuum) -50 daPa to 280 daPa, when efficiency within 073 to 0.85 that the performance and efficiency of direct work more than the prototype, 15-20%, which by design does not have a reverse mode of operation. Thus, the local ventilation fan, made for the counter-rotation of impellers with S-shaped double leaf blades special geometry enables the reversing mode, and increases to 15÷20% capacity, pressure and efficiency in comparison with analogues with the same weight and size characteristics that are very important for improving safety and productivity in mining operations. Execution of local ventilation fans in the reversible modification will allow to reduce the curing time of the deadlock faces after blasting and, consequently, to increase production is the productivity and safety in the mine. Fan of local ventilation shafts, comprising two base module 1-St and 2-nd speed fan connected between a connection Cabinet box so that each module includes a housing, a motor, an impeller mounted directly on the motor shaft, wherein the impellers of the 1st and 2nd stages is made for the counter-rotation, welded together with the non-dual leaf blades S-shaped form with a variable radius of the impeller geometry, calculated by the method of discrete vortices"as working together without directing vanes from the condition of the lowest acoustic power (noise) fan, the highest efficiency, pressure and performance.
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