39 results about "Overall efficiency" patented technology

The invention belongs to the technical field of automation control, and particularly relates to an intelligent cutting control method and system for a PVC foam sheet, and the method comprises the following steps: collecting and preprocessing cutting working condition data, the cutting working condition data including the measurement current of a main shaft motor, the regional temperature in a saw blade protective cover and the current real-time feeding speed; performing moving average filtering on the measurement current to obtain smoothed spindle current; and a thermal viscous resistance index model is constructed, and a thermal viscous resistance index representing the saw blade adhesion risk degree is calculated according to the smoothed main shaft current, the rated working voltage of a system main shaft motor, the real-time feeding speed, the effective cutting sectional area and the area temperature. According to the invention, the phenomenon of serious tooth pasting is eliminated from the source, the smoothness and flatness of the cutting surface of the plate are ensured, the saw blade always works in a proper temperature interval, the service life of a cutter is obviously prolonged, and the overall efficiency of an automatic production line is improved.

The utility model relates to the technical field of denitration provides a kind of booster fan for denitration, including base, the top of base is provided with machine shell, the side of machine shell is provided with motor, the side of machine shell away from motor is provided with air intake, the end of air intake away from motor is provided with air intake pipe, the end of air intake pipe away from air intake is provided with clamping pipe, the side wall of clamping pipe is symmetrically provided with link component, the side wall of link component is provided with second recess, the inside of second recess is provided with clamping shaft, clamping shaft is provided with buckle;By moving the buckle designed on clamping pipe, make it and the first recess on the side wall of air intake pipe disengage tight engagement state, it can easily realize the steady and rapid separation of clamping pipe and air intake pipe, this design simplifies the disassembly process, improves the overall efficiency of maintenance work, ensures that booster fan can be completed in shorter time overhaul, quickly restore efficient operation, effectively reduce downtime, provide strong guarantee for the continuous and stable operation of equipment.

The application discloses a compressor, which comprises a cylinder, a moving blade, a variable-diameter ring and an adjusting assembly. An inner wall surface of the cylinder is provided with an annular groove. The moving blade is rotatably arranged in the cylinder. The variable-diameter ring is arranged in the annular groove. The variable-diameter ring comprises a plurality of adjusting members and an elastic sealing member. The adjusting members are arranged at intervals along the circumference of the cylinder. One end of the elastic sealing member is connected with one of the two adjacent adjusting members, and the other end of the elastic sealing member is connected with the other of the two adjacent adjusting members. The variable-diameter ring is arranged opposite to the blade tip of the moving blade and has a gap. The adjusting assembly is used for adjusting the position of the adjusting members in the radial direction of the cylinder, so as to change the gap size between the variable-diameter ring and the blade tip of the moving blade. The application guarantees the wear compensation during the operation of the compressor, avoids the defect that the traditional abradable coating cannot be recovered, and improves the overall efficiency and reliability of the gas turbine.

The application provides a winter anti-freezing device for a wet cooling tower and a control method thereof, relates to the technical field of cooling towers, and comprises a bypass pipe connected with a tower pipe on a main pipe, a bypass shutoff valve and a bypass flow adjusting valve arranged on the bypass pipe along the water flow direction, and a double-ring distribution pipe assembly connected with a water outlet end of the bypass pipe; a louver assembly is arranged in the circumferential direction at the air inlet of the cooling tower, a driving mechanism is arranged on the louver assembly, and a thermometer is arranged at the louver assembly; the control method comprises the following steps: a controller collects real-time operation parameters, determines the current operation condition according to the parameters, controls the valves, and distributes the main pipe and the bypass flow of the circulating water; and the opening degree of the louver assembly is controlled through the driving mechanism; the problems of poor anti-freezing effect of the wind shield, the lack of automatic adjusting capacity, flexible control, the reduction of unit back pressure, the reduction of cold end loss, the improvement of the overall efficiency of a thermal power generation enterprise, the adaptation to the flexibility requirement of the unit, and the technical effect of preventing the wet cooling tower from freezing are solved.

The utility model relates to the technical field of mining production, in particular to a three-way air door for non-coal mine mining, and aims to solve the problems that in the drift mining process of a non-coal mine at present, the overall dispatching efficiency of mining is greatly influenced due to the fact that the three-way air door which is generally adopted is limited in ventilation capacity, short in drift length and large in drift number. An air door on one side of the three-way air door is connected with an exhaust fan through a hard air duct, two air doors on the other side of the three-way air door are connected into two mechanical mining access paths through hard air ducts respectively, ventilation air paths of the three-way air door are switched in real time through movement of the air blocking door, alternate ventilation and dust removal of the two access paths are achieved, the length of the access paths can be increased, and the service life of the three-way air door is prolonged. And the wind blocking door is driven by external power to rotate and displace under the action of the movable screw rod, so that in the long-route mechanical mining process, the machine retreating distance during equipment transition is effectively shortened, and the overall mining efficiency and management scientificity are further improved.

The utility model discloses a ferrite steel drop hammer impact test's feeding device, including base, the upper end of base is installed hammer drop testing machine, a plurality of sample anvil are fixed with in the bottom of hammer drop testing machine, one side of base is installed two support rods, the upper end one side of support rod is rotatably connected with the cylinder, the piston rod end of two cylinders rotatably connected with the bearing plate in common, the bearing plate is fixed with the feeding frame, four stoppers are installed on the feeding frame with equal interval, and two stoppers are a group, and two groups of stoppers are staggered arrangement. Compared with traditional manual feeding mode, the automatic feeding reduces the link of manual intervention, greatly shortens the feeding time, improves the overall efficiency of test, in addition can satisfy the feeding demand of various types of sample, improves the versatility and applicability of feeding device, can also effectively avoid the damage to feeding frame due to the operation mistake, guarantees the safety of equipment and operating personnel.

The utility model relates to the technical field of water conservancy projects, and discloses a water conservancy project pipeline mounting and supporting device which is provided with an expansion mechanism and a fixing mechanism, the expansion mechanism is used for increasing the contact area with a pipeline, and the fixing mechanism is used for fixing the pipeline, so that the problem that in the current water conservancy project practice, the pipeline cannot be fixed easily is solved. In the prior art, a universal supporting device specially designed for supporting installation of pipelines with different sizes and lengths is lacked, so that in the actual construction process, when the pipelines with various specifications face, temporary building or customization solutions are often needed, the construction difficulty and cost are increased, and the construction period is shortened. In the prior art, the overall efficiency and safety of a project are affected, a traditional pipeline installation method generally can only adapt to pipelines with specific sizes, and additional time and resources are needed to adjust an existing supporting structure once the size or length of the pipelines exceeding an expected range is met.

The invention discloses a feeding mechanism in the round steel straightening production process and a positioning method of the feeding mechanism, and relates to the technical field of straightening workpiece conveying, the feeding mechanism comprises a first vertical plate, a bottom connecting rod and a second vertical plate, the two ends of the bottom connecting rod are fixedly connected with the first vertical plate and the second vertical plate respectively, and the second vertical plate is fixedly connected to a straightening machine; a collaborative feeding chain is formed through the material storage slope, the follow-up feeding assembly and the crank rocker feeding assembly, full-automatic and continuous operation of round steel can be achieved in all stages of arrangement, material taking, transferring and pushing, the follow-up feeding assembly and a crank rocker mechanism have a mechanical linkage relation, the mechanical linkage relation between the follow-up feeding assembly and the crank rocker mechanism is achieved, and therefore the round steel can be automatically and continuously conveyed. The synchronous action can be realized after the driving motor drives the reduction gear, so that the next round steel can be automatically extracted in each material pushing cycle, the stability and efficiency of the feeding rhythm are improved, pause and non-uniformity caused by manual intervention are avoided, and the overall efficiency of straightening production is obviously improved.

The utility model discloses a multi-station petroleum piece machining hydraulic clamp, which belongs to the technical field of machining and comprises a base, a motor is arranged at the bottom of one end of the base, a turntable is arranged at the output end of the motor, a first connecting disc is arranged on one side of the turntable, and an adjusting component is arranged on one side of the first connecting disc. According to the device, the driving gear can be driven to rotate by rotating the rotary knob, so that the placement table on the driven gear is driven to rotate, and the petroleum piece can be driven to rotate on the bridge plate, so that the petroleum piece on the bridge plate can be adjusted in multiple directions, three-face machining of the petroleum piece is achieved, the number of procedures is reduced, and the machining efficiency is improved. By means of the device, the tool replacement frequency is reduced, most machining of petroleum pieces can be completed on one device, the production process is simplified, the machining continuity and the overall efficiency are improved, meanwhile, the device input cost is reduced, and production tasks can be completed without multiple devices and multiple procedures.

To provide a compact, sustainable, high-speed blower that improves overall efficiency, stability, and service life. [Solution] With respect to the blower, by improving the optimized design of the air tube, the wind resistance coefficient of the guide vanes can be reduced while simultaneously ensuring a large value for the flow rate in the path, promoting the linear and uniform extraction of fluid from the air tube, allowing the fan 4 to operate stably. Support auxiliary structures such as the spring 26, bearing 22, and air guide pad further stabilize the position of the fan, preventing centrifugal vibration of the fan from reacting with the rotating shaft 21 and affecting the rotation efficiency of the rotating shaft, thereby greatly improving the operating environment of the fan.

The application relates to the field of ball mill feeding equipment, in particular to a funnel for adding steel balls to a ball mill and a use method, wherein the funnel for adding steel balls to the ball mill comprises a funnel, a cone seat, the funnel is arranged at the feeding end of a feeding pipe fixed at the feeding end of the ball mill, the cone seat is arranged at the discharging end of the funnel, a material cavity is arranged at the joint of the cone seat and the funnel, the material cavity is provided with a first discharging groove in communication with the interior of the funnel and a discharging groove in communication with the feeding pipe, the cone seat is raised along the central axis of the feeding pipe to open the first discharging groove and close the discharging groove, and the cone seat is lowered along the central axis of the feeding pipe to open the discharging groove and close the first discharging groove. The feeding mechanism capable of being opened and closed in the lifting mode is provided through the arranged material cavity, so that the feeding is completed in the mechanical feeding mode, the controllability of the feeding amount is guaranteed, and the overall efficiency is higher compared with manual operation.

The application discloses a turbine inter-stage sealing structure with honeycomb sealing and a gas turbine, and belongs to the field of gas turbines. The turbine inter-stage sealing structure with honeycomb sealing comprises a turbine moving disc and a turbine static disc, a gap is arranged between the turbine moving disc and the turbine static disc, a radial sealing structure is arranged between the turbine moving disc and the turbine static disc, the radial sealing structure comprises two honeycomb cavity structures arranged on the turbine moving disc and the turbine static disc respectively, the two honeycomb cavity structures are arranged along the circumferences of the turbine moving disc and the turbine static disc respectively, the inlets of the two honeycomb cavity structures are opposite to the directions of high-temperature gas flow, the honeycomb cavity structures are used for increasing the flow resistance of the gas flow, and the honeycomb cavity structures are used for inhibiting the gas invasion phenomenon. Meanwhile, the honeycomb structure is used for maximizing the cavity space for vortex dissipation, and the honeycomb structure has excellent geometric mechanical properties, the mass of the turbine disc is reduced, and the overall structural strength is not reduced. The application can reduce the minimum sealing flow and improve the overall efficiency of the gas turbine.

The utility model relates to the technical field of rubber strip deformation prevention, in particular to a U-shaped jacking iron putty type rubber strip deformation prevention protection structure which comprises two jacking pipes, a connecting pipe is arranged between the two jacking pipes, fixing grooves are formed in the two ends of the connecting pipe, sealing rubber strips are arranged in the fixing grooves, and the jacking pipes and the connecting pipe are connected through a connecting mechanism. A buffer mechanism is further arranged on the connecting pipe, the connecting mechanism comprises a clamping block, a third spring, a sliding plate and a clamping base, and a clamping groove matched with the clamping block is formed in the outer surface of the top pipe. According to the utility model, the extrusion force generated in the pushing process of the jacking pipe can be absorbed, and the force transmitted to the interface is reduced, so that the sealing rubber strip is prevented from being excessively extruded, the durability of the sealing rubber strip is improved, the leakage of water, gas or other substances is prevented, and the maintenance work required by sealing failure is reduced; and the later maintenance cost and shutdown time are reduced, meanwhile, the overall efficiency of pipe jacking construction is improved, and construction delay caused by the sealing problem of the connector is reduced.

The invention relates to the technical field of hydraulic driving equipment, in particular to a wheel excavator load-sensitive hydraulic system optimization control method and system.The method includes the following steps that hydraulic cylinder A and B cavity pressure and piston displacement are collected, the pressure difference and the displacement change rate are calculated, inertia response factors are analyzed, the acceleration change rate of a piston is detected, and a variable damping valve is adjusted; according to the method, the hydraulic system is accurately and dynamically controlled, energy distribution and system coordination are optimized, the pressure difference and the displacement change rate are calculated in real time, the load inertia level is recognized, and the pressure fluctuation mean square error is calculated. The through-flow section of the variable damping valve is dynamically adjusted; the damping change is optimized; the main pump flow and the throttling branch flow are accurately adjusted; the pressure fluctuation is reduced;

The utility model provides a compression mechanism, a compressor and refrigeration equipment. The compression mechanism comprises a movable disc and a movable disc, the static disc assembly and the movable disc form a compression cavity, and the static disc assembly comprises a bypass cavity; the bypass structure is arranged on the static disc assembly or the movable disc, and the compression cavity can communicate with the bypass cavity through the bypass structure; wherein the bypass structure comprises a first bypass hole, at least one part of the first bypass hole extends in the circumferential direction of the compression mechanism, and / or the bypass structure comprises a plurality of second bypass holes, and the multiple second bypass holes are distributed in the circumferential direction of the compression mechanism, that is, the circulation sectional area of the bypass structure is increased by increasing the circumferential size of the bypass structure; therefore, when the compressor operates under the bypass working condition, the fluid resistance can be reduced, the power loss is reduced, and the overall efficiency of the compressor under the bypass working condition is improved.

The invention provides a full-flow-channel pneumatic turbine, and belongs to the technical field of pneumatic turbines. The technical problems that existing coal mine roadway drainage equipment is low in efficiency, electric equipment has anti-explosion hidden dangers, and the working environment temperature rises are solved. The full-flow-channel pneumatic turbine comprises a flow guide section, an acting section and a supporting section, the flow guide section is provided with a volute and at least two stages of seat rings, the acting section comprises multiple stages of rotating wheels which are staggered with the seat rings and coaxially installed, and a volute outlet flow channel, multiple stages of seat ring nozzle flow channels, rotating wheel blade flow channels and an exhaust channel are sequentially communicated to form an axial continuous full flow channel. Compressed air enters through an inlet and pushes the rotating wheel to rotate step by step to output mechanical energy, and finally low-temperature exhaust gas is exhausted into a roadway. The device has the advantages of high overall efficiency, complete explosion prevention, capability of reducing the roadway temperature by exhausting and enhancing gas emission, convenience in maintenance and adaptation due to structure modularization and the like, and is suitable for coal mine drainage, ventilation, drilling and anchoring and other scenes.

The utility model discloses a turbine blade of gas turbine, including the cooling cavity chamber of multiple interval distribution from below to above inside turbine blade and multiple cooling channel that penetrates turbine blade from bottom to top for the cooling inside turbine blade of gas turbine, based on the design of turbine blade cooling channel and cooling cavity chamber of the utility model, cooling gas can enter from the port of turbine blade bottom cooling channel, from below to above fills different height cooling cavity in proper order, and flows out through the port of turbine blade top cooling channel, compared with the blade of traditional cooling channel, the interior heat exchange area becomes big, improves the cooling effect and gas turbine overall efficiency, can effectively promote the cooling performance, and can also give consideration to manufacturing feasibility and economy.

This utility model discloses a hydraulic actuator sealing groove repair device, relating to the field of hydraulic actuator repair technology. It includes: a platform with displacement components installed on both sides of its upper surface; multiple sets of clamping and limiting components installed above the displacement components; a frame installed at the middle position of the upper surface of the platform; the clamping ends of the clamping and limiting components extending into the frame; a repair component installed at one end of the frame; the repair component includes an assembly frame; a drive motor is installed on the outer wall of the assembly frame; the output end of the drive motor is connected to a main gear via a shaft; three sets of secondary gears are installed in a ring around the main gear; and internal gear rings are installed around the secondary gears. The main gear drives the secondary gears to rotate and displace on the internal gear rings. This solves the problem that existing repair devices can only drive one repair head for grinding, resulting in low overall efficiency, poor stability, and the easy displacement of objects due to vibration during repair.

The invention relates to a method and a device for predicting the aerodynamic performance of a supercritical carbon dioxide turbine by considering the influence of cooling gas, and the method comprises the following steps: S1, building an initialization model of a cooling shaft end, creating grid division, and inputting parameters; s2, according to the flowing heat absorption process of the cooling air at the cooling shaft end, the thermal state of the cooling air reaching an impeller inlet is calculated; s3, calculating the thermal state of the mixed working medium according to the thermal state of the mainstream working medium at the outlet of the turbine nozzle and the thermal state of the cooling gas reaching the inlet of the impeller, calculating the thermal state of the mixed working medium at the outlet of the impeller according to the thermal state of the mixed working medium and the structural parameters of the impeller, and calculating the total efficiency of the turbine; and S4, outputting a prediction result. According to the prediction method provided by the invention, the mixing effect of the cooling gas and the mainstream working medium at the impeller inlet is considered, the real aerodynamic performance of the turbine can be obtained, and unreasonable aerodynamic efficiency is avoided.

The invention provides a motor and an air blower, the motor comprises a shell structure, a stator core, a winding, a rotor, a rotating shaft, a front bearing structure and a rear radial bearing, the stator core is fixed in a cavity of the shell structure, the front bearing structure is installed between the front part of the rotating shaft and the shell structure, and the rear radial bearing is installed between the rear part of the rotating shaft and the shell structure; the motor further comprises a main channel, a middle branch channel, a front branch channel, a rear branch channel and a bearing branch channel. The circumferential surface of the shell structure is provided with a plurality of air outlet channels which are arranged in the radial direction and the axial direction. According to the scheme, cooling air can respectively carry out centralized cooling on the stator core, the rotor, the winding, the front bearing structure and the rear radial bearing through the channels, so that the heat dissipation efficiency of the motor is improved, the operation performance of the motor is favorably improved, and the service life of the motor is prolonged; and the design of the plurality of cooling channels fully covers a heating area in the motor, so that the heat dissipation performance is improved, and the overall efficiency of the motor is improved.

The utility model relates to the technical field of port oil-way pipelines, and discloses a combined port oil-way pipeline convenient to disassemble and assemble, which comprises a pipeline A and a pipeline B. The end face of the pipeline B is fixedly connected with a mounting ring, the mounting ring is provided with a disassembling and assembling assembly, the disassembling and assembling assembly comprises an extension plate, the top of the extension plate is movably connected with an insertion rod in a penetrating manner, and the insertion rod is connected with the pipeline A in a penetrating manner. The surface of the inserting rod is fixedly sleeved with a limiting plate, and the surface of the inserting rod is sleeved with a spring. According to the quick pipeline separation device, the inserting rod can be driven to be separated from the inserting groove by rotating the handle of the quick unlocking assembly, and quick pipeline separation is achieved; during installation, reverse operation is carried out, and the insertion rod abuts against the spring. Complex tools are not needed in the whole process, for the port operation scene where pipeline layout adjustment or equipment maintenance needs to be conducted frequently through the convenient disassembly and assembly mode, the working efficiency can be remarkably improved, the operation stagnation time caused by pipeline disassembly and assembly can be shortened, and then the overall oil product conveying operation efficiency of a port is improved.

A gas turbine engine is provided. The gas turbine engine includes: a turbomachine having a compressor section, a combustion section, and a turbine section arranged in serial flow order, the compressor section having a high pressure compressor defining a high pressure compressor exit area (AHPCExit) in square inches; wherein the gas turbine engine defines a redline exhaust gas temperature (EGT) in degrees Celsius, a total sea level static thrust output (FnTotal) in pounds, and a corrected specific thrust, wherein the corrected specific thrust is greater than or equal to 42 and less than or equal to 90, the corrected specific determined as follows: FnTotal×EGT / (AHPCExit2×1000). In some instances, a gas turbine engine also comprises a gearbox efficiency rating and / or an overall efficiency rating.

The utility model discloses a stable metal impeller pump capable of reducing radial runout, and belongs to the technical field of impeller pumps. A stable type metal impeller pump capable of reducing radial run-out comprises a pump body, a rotating shaft is rotationally arranged in the pump body, an impeller body is arranged at the end, located in the pump body, of the rotating shaft, the outer wall of the rotating shaft is connected with the pump body in a sealed mode through a sealing ring, and the stable type metal impeller pump further comprises a double-bearing assembly used for supporting the rotating shaft, the double-bearing assemblies are located on the two sides of the impeller body correspondingly. The double-bearing assemblies are arranged in the pump body to support the rotating shaft, the double-bearing assemblies are located on the two sides of the impeller body respectively, the rotating shaft can be changed into a simply supported beam structure from a cantilever beam structure, the rigidity, stability and reliability of the rotating shaft can be remarkably improved, bending deformation of the rotating shaft is reduced, radial run-out is reduced, and the service life of the rotating shaft is prolonged. And the dynamic balance of the impeller body can be improved, radial runout and vibration are reduced, and the overall efficiency and performance of the pump are improved.

The utility model provides an aluminum profile aging air cooling tool, belongs to the technical field of aluminum profile processing, and solves the technical problems that a fan is inconvenient to mount and dismount, and the fan is difficult to overhaul and maintain in the later period. The aluminum profile aging air cooling tool comprises a fixing frame, three mounting frames are fixedly connected to the fixing frame, square plates are fixedly connected to the top ends and the bottoms of one sides of the three mounting frames, and two first round rods are fixedly connected to the sides, close to each other, of the two square plates located at the same end; the two first round rods at the same end are sleeved with four sliding plates, the sliding plates are slidably connected with the first round rods, two square grooves are formed in the sides, close to the mounting frame, of the sliding plates, connecting plates are arranged in the square grooves, and two second round rods are fixedly connected to the sides, away from each other, of the two connecting plates. According to the utility model, the fan is convenient to mount and dismount, the time and energy required for mounting and dismounting the fan are reduced, and the overall efficiency of fan maintenance work is improved.

The invention discloses a boiler soot blowing method, system, medium and equipment, and relates to the technical field of coal-fired boiler heating surface cleaning. According to the boiler operation state data of the recent historical time period, the soot deposition change condition of the boiler in the subsequent time period is predicted, the optimal soot blowing strategy of each soot blower in the boiler is determined through the trained reinforcement learning model according to the prediction result and the boiler operation state data, traditional trigger type soot blowing control is avoided, and the soot blowing efficiency is improved. Preventive and continuous cleaning measures can be taken before the dust accumulation problem is serious, and the boiler is always kept in an efficient operation interval. Not only can consumption of soot blowing media be obviously reduced, but also unnecessary erosion corrosion to boiler pipelines can be reduced to the maximum extent, and the service life of equipment is prolonged. And meanwhile, the comprehensive influence of different soot blowing operation sequences on future long-term benefits of the system is evaluated based on state conversion of the whole system of the boiler, so that a soot blowing strategy most favorable for the overall efficiency and economical efficiency of a power plant can be found.

The invention provides a flow guide device and a gas turbine, and relates to the technical field of gas turbine equipment. The flow guide device comprises a flow guide partition plate and a cover plate; the cover plate and the bearing seat form an annular channel for cold air circulation; an annular airflow channel for adjusting the width and angle of a cold air outlet of the annular channel is arranged on the flow guide partition plate. Cold air at the air compressor end is guided to the position between the bearing seat and the rotor disc through the annular channel, the width and angle of the cold air outlet of the annular channel are adjusted through the annular air flow channel, the outflow speed and the outflow angle of the cold air are controlled, and impact cooling can be directionally formed on the surface of the rotor disc when the cold air flows out. On the premise that the cold air amount is given, the utilization efficiency of cooling air can be effectively improved, the key area on the rotor disc is efficiently cooled, the temperature field of the rotor disc is improved, the reliability of the rotor disc is improved, the service life of the rotor disc is prolonged, and then the overall efficiency of the gas turbine is guaranteed.

The utility model relates to the technical field of washing machine accessories, and discloses a support for a transmission main shaft, which comprises a shaft sleeve main body, a shaft sleeve positioning ring seat is fixedly mounted at the bottom of the shaft sleeve main body, a transmission shaft is rotatably connected to the inner wall of the shaft sleeve main body, and wedging grooves are formed in the top and the bottom of the transmission shaft. And an insertion block is movably inserted into an inner cavity of the wedging groove. Through the design of the welding piece, in the accessory production process, the inserting blocks can be welded to the output shaft of the motor or the working end of the washing machine through the welding piece, one end of the transmission shaft is inserted into one inserting block, and then the whole convenient installation mechanism is controlled to stretch; the other end of the transmission shaft is inserted into the other insertion block, so that the structure is mounted, the problem of high manpower consumption caused by insertion and fastening of a plurality of groups of bolts is avoided, and the overall assembly efficiency of the washing machine is improved.

The invention relates to the technical field of pneumatic turbines, in particular to a rotating wheel for a pneumatic turbine, and solves the problem that an existing rotating wheel of the pneumatic turbine is low in efficiency. The rotating wheel comprises a rotating wheel hub, a rotating wheel outer ring and a plurality of wing-shaped blades, and the wing-shaped blades are connected between the hub and the outer ring to form a divergent blade runner; the wing-shaped paddle is in a three-dimensional twisted wing shape, and the wing inner side and the wing outer side of the wing-shaped paddle have different relative thicknesses, relative cambers and mounting angles; sub-runners are formed between the adjacent paddles, the cross sectional areas of the sub-runners are gradually reduced from an inlet to an outlet, and the airflow directions of the inlet and the outlet are configured to be axially parallel or basically parallel to the rotating wheel. The rotating wheel can be used in multi-stage series connection, and parameters of each stage of blade are gradually changed and optimized in the airflow direction. Through the collaborative design of the divergent flow channel and the three-dimensional twisted blades, the full-flow-channel airflow organization is optimized, the energy conversion efficiency is remarkably improved, the overall efficiency up to 89.8% is achieved in a four-stage pneumatic turbine, and the structural universality is high.

The invention relates to the technical field of oil pumping units, and discloses a tooth-shaped load belt direct-drive electric control reversing oil pumping unit which comprises a permanent magnet motor device, synchronous pulleys, an auxiliary guide system and a tooth-shaped load belt, and the whole device adopts the permanent magnet motor device to directly drive the tooth-shaped load belt through the double synchronous pulleys; the permanent magnet efficient synchronous motor is adopted for direct driving, one-stage transmission is reduced compared with a conventional electric control reversing oil pumping unit, the transmission efficiency is improved by about 5%-6%, meanwhile, the synchronous belt is adopted as a load belt, the transmission precision and the transmission efficiency are improved, the transmission efficiency is improved by about 6%-7%, and the overall efficiency of the whole machine is improved by about 10%-12%; the toothed belt is adopted to replace an original flat belt for transmission, the slipping phenomenon of an original load belt is thoroughly eliminated, the phenomenon of well stopping due to slipping is reduced, crude oil production of an oil field and an oil well is more stable, a roller structure is removed, maintenance points are reduced, the weight of the whole machine is reduced by 2 tons, and equipment transportation is more convenient.