201 results about "Mechanical efficiency" patented technology

The invention discloses a self-oil-catching low-friction composite groove of an inner curve hydraulic motor valve plate and a parameterization design method of the self-oil-catching low-friction composite groove, aiming at the low-friction design of the valve plate, the low-friction composite groove with a self-oil-catching function is designed on a plane of a sealing belt of the valve plate. Structural parametric modeling is conducted on the composite grooves, structural parameters corresponding to the composite grooves are reasonably selected, the valve plate composite grooves of different structures are obtained, corresponding structural models are established, and lubricating oil film distribution, bearing capacity and friction coefficients corresponding to the different structural models of the valve plate composite grooves are obtained through calculation and testing. And performing comprehensive comparison to obtain the optimal design parameters of the composite groove of the valve plate, which meet the optimization target. The self-oil-catching low-friction composite grooves with different structural parameters are designed on the surface of the valve plate of the inner curve hydraulic motor, so that the low-friction design of the surface of the valve plate is realized, the abrasion of the surface of the valve plate is reduced, the mechanical efficiency of the inner curve hydraulic motor is improved, and the service life of the inner curve hydraulic motor is prolonged.

The invention provides an axial magnetic flux motor driven RV speed reduction driving assembly which comprises an axial magnetic flux motor unit and an RV speed reducer unit which are connected, the axial magnetic flux motor unit and the RV speed reducer unit are integrated in a shell, the axial magnetic flux motor unit comprises a plurality of stators which are distributed in an annular mode, and the stators are connected with the axial magnetic flux motor unit. A stator is arranged on the rotor, a disc type rotor is arranged on each of the two sides of the stator, a plurality of torsion bars which are uniformly distributed in the circumferential direction are arranged on the rotor facing the side where the RV speed reducer unit is located, the torsion bars are connected with a sun gear of a planetary gear train of the RV speed reducer unit, and an output disc of the RV speed reducer unit is a power output end. The RV speed reduction driving assembly driven by the axial magnetic flux motor has the advantages of being large in starting torque, high in mechanical efficiency, compact in structure, high in overload capacity and the like.

The invention relates to the technical field of thermal power generating unit monitoring, in particular to a thermal power generating unit fault diagnosis method and system based on artificial intelligence, and the method comprises the steps: obtaining coal grinding process monitoring data of a coal mill in a thermal power generating unit, and generating coal grinding contact pressure data according to the coal grinding process monitoring data and a coal grinding hydraulic mechanical efficiency model; coal milling same-pressure vibration data are generated according to the coal milling contact pressure data, and whether vibration of the coal mill is abnormal or not is judged according to the coal milling same-pressure vibration data; if not, obtaining predicted contact pressure data according to the coal grinding contact pressure data and a preset LSTM pressure prediction model; and generating a coal milling fault diagnosis report according to the predicted contact pressure data. According to the invention, a complete thermal power generating unit fault diagnosis is formed from data acquisition, fault detection to prediction diagnosis.

The invention discloses a high-pressure water pump motor remote control method based on data acquisition, and relates to the technical field of intelligent analysis, and the method comprises the following steps: calculating historical water pump output power, constructing an interference efficiency model, and calculating a predicted interference efficiency value. And according to the historical water pump mechanical efficiency distributed in the second water pump mechanical efficiency interval, a standard water pump self parameter interval and a standard water pump related parameter interval are set, and a first control signal and a second control signal are sent. By comparing and analyzing the mechanical efficiency of the first water pump and the historical water pump, the efficiency of the whole system is improved, an interference efficiency model in historical data is calculated, the reliability and the stability of equipment are improved, the automation level of the system is improved by comparing the parameters of the water pump with the standard parameter interval, and the reliability and the stability of the system are improved. According to historical data and an interference efficiency model, a standard parameter interval suitable for a specific water pump can be set, so that a personalized and accurate control strategy is realized.

The invention relates to the field of guide bearing bush control, in particular to a signal processing system and method for guide bearing bush clearance automatic adjustment, and the system comprises a clearance metering module, a model boundary module, a fault learning module, a clearance adjustment module and an oil film lubrication module, the model boundary module is used for establishing a dynamic pressure lubrication model of the guide bearing bush and solving the gap of the guide bearing bush, the fault learning module is used for determining the gap adjustment amount, the gap adjustment module is used for adjusting gap distribution, and the oil film lubrication module is used for adjusting lubricating oil injection. And fault identification and automatic fault-tolerant adjustment are carried out, so that mechanical vibration of the bearing is reduced, operation stability of equipment is guaranteed, abnormal bearing bush gaps are avoided, mechanical efficiency of the bearing is improved, invalid power loss is reduced, service life of the equipment is prolonged, thickness and pressure distribution of a lubricating oil film are improved, and performance of bearing turbine equipment is improved.

The invention relates to a steel profile. The invention is characterized in that a small convex narrow surface is arranged on the base body or the boss. Contact area can be reduced, friction force is reduced, and mechanical efficiency is improved.

The utility model provides a circulating type hammering device, and belongs to the field of mechanical engineering. The problems that at present, the number of circulating reciprocating type releasing devices which are compact in structure, low in manufacturing process requirement and large in force storage stroke is small are solved. And the problems of low mechanical efficiency, poor stability and high process requirements exist. A circulating reciprocating type hammering device comprises a guide rail, a hammer body and a hook, the hammer body is arranged on one side of the guide rail in a sliding mode, a reset spring is arranged between the hammer body and one side of the guide rail, and the hook is arranged on the guide rail in a sliding mode and can move back and forth in a reciprocating mode. When the hook gets close to the hammer body, the hook grabs the hammer body and drives the hammer body to compress the reset spring, and when the reset spring is compressed to the limit, the hook releases the hammer body, and the hammer body is popped out by the reset spring. The device has the advantages of being small in occupied space, high in stability, high in mechanical efficiency, low in process requirement and convenient to achieve circulating type'force storage-release '.

The utility model discloses a vegetable oil processing and packaging mechanism, comprising a first material discharge baffle plate, a second material discharge baffle plate, a first gear, a second gear and a stepper motor, wherein pin shaft sleeves are fixedly installed at the upper end ends of both sides of the first material discharge baffle plate, a connecting shaft is fixedly installed on the pin shaft sleeve, a surface of one end of the connecting shaft is fixedly connected with the first gear, the other end of the connecting shaft is movably installed on a bearing, the bearing is fixedly installed on the side of a silo mounting plate, and a second material discharge baffle plate is arranged on one side of the first material discharge baffle plate; the vegetable oil processing and packaging mechanism drives the first gear to rotate through the first material discharge baffle plate, the second material discharge baffle plate and the stepper motor, and the stepper motor drives the first gear to rotate under the action of each gear, and because the first gear is meshed and connected with the second gear, the size and duration of opening and closing of the first material discharge baffle plate and the second material discharge baffle plate at the bottom silo door are controlled to control the amount and speed of the material discharge, and after setting the program, the mechanical efficiency is high, it is safe and reliable, and it saves time and labor.

The utility model belongs to the technical field of refrigeration compressors, and discloses an air cylinder assembly, a compressor pump body and a compressor. An air cylinder cavity is formed in the center of the air cylinder body, and an air cylinder sliding piece groove is formed in the circumferential wall of the air cylinder cavity in the radial direction. At the notch end of the air cylinder sliding sheet groove, the joint of the groove wall of the air cylinder sliding sheet groove and the peripheral wall of the air cylinder cavity is of a fillet structure. The fillet structure is located on one side of an air suction cavity of the air cylinder cavity. According to the utility model, the local stress condition of the contact part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is improved, the friction condition of the matching part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is greatly improved, the lubrication condition between the cylinder slip sheet groove and the slip sheet is effectively improved, the friction loss and abrasion are reduced, and the service life is prolonged. Therefore, the mechanical efficiency of the cylinder assembly and the compressor pump body is improved, and the working performance of the compressor is ensured.

The utility model discloses a hollow motor-driven intelligent switch for oil and gas well layered control, which relates to the technical field of switches and comprises a support connecting unit, a transmission unit and a control communication unit, the support connecting unit mainly comprises a connector A, a fixed seat A, a connecting nut A, a valve seat, a transmission cavity shell, a connecting nut B, a connecting seat, a controller shell, a connecting pipe, a connecting nut C, a fixed seat B and a connector B; the transmission unit mainly comprises a dynamic sealing device B, a hollow torque motor, a speed reducer, an output flange plate, a bearing check ring, a transmission nut assembly, a hollow lead screw, a spacer ring, a dynamic sealing device A and a valve element. The control communication unit mainly comprises a central controller; the transmission link is reduced, the mechanical efficiency is improved, the working reliability is improved, and the continuous oil pipe is matched for dragging, so that the device can be put at any underground position at one time; and the large output torque ensures the normal opening of the intelligent switch under the condition that the internal and external pressure difference is not less than 10MPa.

The invention provides a nonlinear gear and rack type inerter damper and a using method thereof. The nonlinear gear and rack type inerter damper comprises a transmission assembly, an inerter synergistic assembly and an energy dissipation and shock absorption assembly. The transmission assembly comprises a box body, a rack and a gear mechanical group, a rack support for the rack to slide is arranged on the box body, and the rack is in meshed connection with the gear mechanical group; the inerter synergy assembly is fixed to a transmission shaft of the last stage of gear of the gear mechanical set, and the energy dissipation and shock absorption assembly is fixed to the box body and located below the inerter synergy assembly. According to the transmission assembly, external horizontal movement is converted into rotating movement of a gear and rack system of the device, the transmission ratio is increased, the mechanical efficiency is high, and energy loss can be effectively reduced; a mass block of the inerter synergistic assembly is connected with a flywheel through a spring and a threaded rod, nonlinear adjustment of the inerter can be achieved by changing the rigidity of the spring, magnets of different poles of the energy dissipation and shock absorption assembly are distributed in a staggered mode, and a closed magnetic circuit is provided for the inerter synergistic assembly.

The utility model discloses a jacking and reversing device and a three-dimensional storage robot. The jacking and reversing device comprises a rack, a jacking mechanism and a reversing mechanism, the two jacking driving mechanisms are arranged on the machine frame, and the two jacking driving mechanisms are arranged on the machine frame; the two jacking transmission mechanisms are arranged at the two opposite ends of the rack respectively, the input ends of the two jacking transmission mechanisms are connected with the jacking driving mechanisms respectively, and the jacking driving mechanisms drive the jacking transmission mechanisms to rotate; the output end of each jacking transmission mechanism is connected with the input end of the corresponding jacking reversing execution mechanism, and the jacking reversing execution mechanisms are used for converting rotation of the jacking transmission mechanisms into lifting motion; and the jacking component is connected with the output end of the jacking reversing execution mechanism, and the output end of the jacking reversing execution mechanism ascends and descends to drive the jacking component to ascend and descend. According to the utility model, the mechanical efficiency can be improved.

The utility model discloses a jacking and reversing device and a three-dimensional storage robot. The jacking and reversing device comprises a rack, a jacking mechanism and a reversing mechanism, the two jacking transmission mechanisms are arranged at the two opposite ends of the rack correspondingly; the jacking driving mechanism is arranged on the rack and located between the two jacking transmission mechanisms, the jacking driving mechanism comprises a jacking motor and a jacking speed reducer connected with the jacking motor, and the jacking speed reducer comprises two driving output ends which are oppositely arranged; the two transmission mechanisms are arranged between the jacking driving mechanism and the jacking transmission mechanisms respectively, and the two ends of each transmission mechanism are connected with the driving output end and the transmission input end respectively; the jacking reversing executing mechanism is used for converting rotation of the jacking transmission mechanism into lifting motion; and the jacking component is connected with the reversing output end, and the reversing output end ascends and descends to drive the jacking component to ascend and descend. According to the utility model, the mechanical efficiency can be improved.

The utility model relates to the technical field of mechanical equipment, and provides a drive axle and an operation machine. The drive axle comprises an axle housing, two half shafts, a first speed reducer, a second speed reducer and a brake, and the two half shafts are rotationally arranged in the axle housing; the first speed reducer is arranged between the two half shafts in a transmission manner; the second speed reducers are arranged at the ends, away from the first speed reducers, of the half shafts in a one-to-one corresponding transmission mode. Hubs are arranged outside the second speed reducers in a transmission mode. The brake is arranged on the axle housing and connected with the hub, and the brake is used for controlling rotation of the hub. According to the drive axle, the defect that the drive axle in the prior art is generally large in size due to the fact that the transmission ratio of the drive axle is low is overcome, the drive axle with the large transmission ratio is achieved, and operation mechanical efficiency and installation compactness are improved.

The invention discloses a traction machine controlled by maximum traction force, which belongs to the technical field of power grid erection, and comprises a base and a traction assembly, and the traction assembly is provided with a traction rope; the traction control end is used for adjusting the traction force of the traction assembly; the traction control end specifically comprises a data acquisition module used for acquiring cable state data; the cable analysis unit is used for generating a traction adjustment demand index according to the cable state data; the traction force adjusting unit is used for acquiring environmental data in cable erection and mechanical efficiency of a pulley and generating a traction force correction coefficient of the traction assembly; the adjustment control module is used for adjusting the current traction force of the traction assembly according to the traction force correction coefficient of the traction machine; whether the current traction force is in the optimal state or not can be accurately judged, the traction force is dynamically adjusted, cable damage or low erecting efficiency caused by improper traction force is avoided, and therefore the safety of the traction machine during cable erecting is improved.

The utility model discloses a jacking and reversing device and a three-dimensional storage robot. The jacking and reversing device comprises a rack, a jacking mechanism and a reversing mechanism, the two jacking transmission mechanisms are arranged at the two opposite ends of the rack correspondingly; the jacking driving mechanism is arranged on the rack and located between the two jacking transmission mechanisms; the two transmission mechanisms are arranged between the jacking driving mechanism and the jacking transmission mechanisms respectively, the two ends of each transmission mechanism are connected with the driving output end and the transmission input end respectively, and the jacking driving mechanism drives the jacking transmission mechanisms to rotate through the two transmission mechanisms; each transmission output end is connected with one jacking reversing execution mechanism, and the jacking reversing execution mechanisms are used for converting rotation of the jacking transmission mechanisms into lifting motion; and the jacking component is connected with the reversing output end, and the reversing output end ascends and descends to drive the jacking component to ascend and descend. According to the utility model, the mechanical efficiency can be improved.

The invention discloses a double-sided weft insertion device for a double-needle bar warp knitting machine, which comprises a front weft insertion mechanism, a rear weft insertion mechanism, a front weft insertion mechanism and a rear weft insertion mechanism, the rear weft laying mechanism is used for conveying the weft to a cloth fell of the rear needle bed, and the front weft laying mechanism and the rear weft laying mechanism are symmetrically arranged on the two sides of the rack respectively; the weft laying transmission mechanism is used for providing power for the front weft laying mechanism and the rear weft laying mechanism; the front weft yarn breaking mechanism is mounted below a cloth fell of the front needle bed; and the rear weft breaking mechanism is arranged below the cloth fell of the rear needle bed and is used for breaking the connection between the weft and the rear weft laying mechanism. According to the invention, a set of weft-laying transmission mechanism can be adopted to drive the front weft-laying mechanism and the rear weft-laying mechanism to independently lay on the two needle beds respectively, so that the three-dimensional grid surface fabric can be woven, and the produced three-dimensional grid surface fabric has the advantages of large breadth, good grid locking, stable thickness, high yield and the like; the product competitiveness is greatly improved, and the mechanical efficiency and the working efficiency can be improved.

The plunger assembly comprises a plunger, a spring pin and the needle roller bearing, the needle roller bearing comprises an outer ring and a needle roller, a shaft core is arranged in the center of the needle roller bearing, the needle roller is arranged between the shaft core and the outer ring, fixing grooves are formed in the two sides of the plunger, and the spring pin is arranged in the fixing grooves. The two sides of the shaft core are inserted into the fixing grooves, a spring pin is further arranged at one end of the shaft core, a needle bearing cavity for the needle bearing to be installed is formed in the plunger, when the needle bearing rotates at a high speed, a liquid dynamic pressure oil film is formed between the needle bearing and the needle bearing cavity, and the liquid dynamic pressure oil film provides supporting force for the needle bearing. The shaft core and the liquid dynamic pressure oil film jointly support the downward pressure of the needle bearing, and the needle bearing is characterized in that the liquid dynamic pressure oil film can provide supporting force, the liquid dynamic pressure oil film and the shaft core jointly bear the downward pressure of the needle bearing, frictional resistance is reduced, mechanical efficiency is improved, part abrasion is reduced, and meanwhile the supporting stability of the needle bearing is enhanced.

The invention discloses a refrigerant leakage detection method, an air conditioner and a storage medium, relates to the technical field of air conditioners, and discloses the refrigerant leakage detection method which comprises the steps that if the calculated system refrigerant amount of the air conditioner is out of a normal refrigerant use interval, the refrigerant amount of the air conditioner is detected; the total system power of the air conditioner is determined according to the refrigerant mass flow, the inlet and outlet enthalpy value of the compressor, the indoor and outdoor fan power, the electric control power and the mechanical efficiency of the compressor when the air conditioner runs; determining electric load information of the system according to the total power of the system; and when the system electrical load information is out of the normal load interval, it is judged that refrigerant leakage occurs. When the calculated system refrigerant amount is out of the normal use interval, it is indicated that the air conditioner has the refrigerant leakage risk, at the moment, whether refrigerant leakage exists in the air conditioner or not is further judged based on the system electrical load information of the air conditioner, such as theoretical power / current and actual power / current, the accuracy of refrigerant leakage detection is improved, and the working efficiency is improved. And misjudgment of refrigerant leakage is avoided.

An actuator comprises a sun wheel roller (104), a planet wheel roller (102), an auxiliary roller (103) and a fixed gear ring (101), the sun wheel roller (104) is located in the center, and the fixed gear ring (101) is located outside all elements. The auxiliary roller (103) is positioned between the planet wheel roller (102) and the fixed gear ring (101), and the planet wheel roller (102) is in contact with the sun wheel roller (104), the auxiliary roller (103) and the fixed gear ring (101), characterized in that the sun wheel roller (104), the planet wheel roller (102), the auxiliary roller (103) and the fixed gear ring (101) all have a truncated cone geometry or a truncated cone geometry. According to the invention, a transmission device is realized, which provides a simple method for changing the pre-tightening force on the rolling contact element, thereby providing an effective means for improving the torque density and the mechanical efficiency of the transmission device.

According to the technical scheme, the brick stacking machine is characterized by comprising a motor, an output shaft of the motor is fixedly connected with a driving wheel and rotationally connected with a driving rod, the driving wheel is provided with limiting columns on the two sides of the driving rod, the front end of the driving rod is rotationally connected with a rotating rod, and the rotating rod is rotationally connected with a fork rod. The brick stacking machine has the following beneficial effects that the driving wheel rotates to drive the connecting mechanism, so that the fork base horizontally moves on the brick discharging platform to fork horizontal bricks, then bricks are lifted, turned over and moved to the brick stacking platform to be vertically put down and continue to rotate, the fork base is separated from the bricks, the driving wheel rotates and resets, and the operation is repeated; the next brick is vertically placed and pushed to other bricks to horizontally move, the bricks can be vertically stacked on the brick stacking platform, manual operation is not needed, and the mechanical efficiency is high.

The invention provides a hybrid power gearbox and a vehicle, and belongs to the technical field of vehicles. The hybrid power gearbox comprises a shell, a first motor, a second motor, a transmission assembly and a differential mechanism. The shell is provided with a motor cavity, a transmission cavity, a first shaft hole, a second shaft hole, a first oil return hole and a second oil return hole; the height of the bottom surface of the motor cavity is gradually reduced from the first motor to the second motor; an output shaft of the first motor and an output shaft of the second motor extend into the transmission cavity through the first shaft hole and the second shaft hole correspondingly and are in transmission connection with the transmission assembly. The first oil return hole and the second oil return hole are both communicated with the motor cavity and the transmission cavity, the first oil return hole is located in the position, close to the second motor and the bottom face of the motor cavity, of the shell, and the second oil return hole is located in the position, close to the first motor and the bottom face of the motor cavity, of the shell. By the adoption of the hybrid power gearbox, the mechanical efficiency of the hybrid power gearbox is improved.

The utility model discloses a sealing installation tool special for a rotating vane type steering engine. The sealing installation tool comprises a cylinder body tool and a rotor tool. The cylinder body tool comprises a first cylinder body tool and a second cylinder body tool which are used for fixing a sealing element on the cylinder body, and a third cylinder body tool and a fourth cylinder body tool which are mounted on the upper surface of the cylinder body; the rotor tool comprises a first rotor tool installed on a rotor neck, a second rotor tool used for fixing a sealing piece on a rotor, a third rotor tool and a special tool for sealing installation of a cylinder body and the rotor, the fit clearance is reduced on the premise that installation is guaranteed, the mechanical efficiency of the rotating vane type steering engine is improved, the installation success rate is increased, and the installation cost is reduced. The loss of the sealing element in the installation process is reduced, the installation time is greatly shortened, and the sealing element is suitable for installation of various special seals for the non-rotating vane type hydraulic steering engine and good in universality.

The metal-based self-lubricating shaft sleeve comprises an outer sleeve and an inner sleeve, the outer sleeve is connected with the inner sleeve, the two ends of the outer sleeve and the inner sleeve are connected in a hasp mode after the outer sleeve and the inner sleeve are unfolded, and an oil groove set and an oil hole set are arranged on the inner wall of the inner sleeve. The oil groove group comprises a linear groove and an oblique groove, the oblique groove and the linear groove are of an integrated structure, and the angle between the oblique groove and the linear groove is an acute angle; the oil hole set comprises a plurality of oil storage holes arranged in an array mode, and the oil storage holes are the same in size and depth. The inner sleeve is provided with the oil groove group and the oil hole group, the linear grooves are circumferentially arranged, and the oil storage holes are distributed in an array manner and can be uniformly distributed on the whole working surface of the bearing, so that a stable oil supply environment and space are provided, the energy loss is reduced, and the mechanical efficiency is improved; the oil groove group comprises a linear groove and an oblique groove, can store a large amount of lubricating oil, can reduce friction and abrasion caused by poor lubrication of the bearing, reduces the operation temperature of the bearing, and prolongs the service life.

The invention relates to the technical field of compressors, in particular to a lead screw linear compressor which comprises a lead screw motor, a motor shell, a piston rod, a connecting barrel, a cooling fan, an air path pipe, an air cylinder body, a water jacket and a cylinder cover. The piston rod is directly connected with the lead screw motor, linear motion output by the lead screw motor is used for pushing the piston rod to move in a reciprocating mode to compress gas, and the piston head in the air cylinder body is used for constructing the first-stage compression chamber and the second-stage compression chamber. Gas paths are arranged in the cylinder cover and the base of the cylinder body around the first-stage compression chamber and the second-stage compression chamber and are communicated with a first-stage exhaust valve and a second-stage air inlet valve, so that second-stage gas compression under the bidirectional action of the piston rod is realized; on the basis that the mechanical structure of the piston compressor is simplified, the mechanical efficiency is improved, maintenance is convenient, meanwhile, the two-way piston rod can achieve two-stage gas compression in the one-time reciprocating process, friction loss is reduced, and stable and safe operation of the piston compressor can be guaranteed.

The utility model belongs to the technical field of down-the-hole drills, and discloses a driving device and a down-the-hole drill. The driving device comprises a hydraulic motor and a speed reducer, the speed reducer comprises a shell, a multi-stage planetary gear train structure and an output shaft, the hydraulic motor is arranged outside the shell, the multi-stage planetary gear train structure is arranged in the shell, and the multi-stage planetary gear train structure comprises a plurality of planet rows which are connected in series; a driving shaft of the hydraulic motor is in driving connection with an input piece of the multi-stage planetary gear train structure, and an output piece of the multi-stage planetary gear train structure is in transmission connection with the output shaft. Multi-stage speed reduction and torque increase of the speed reducer are realized through a multi-stage planetary gear train structure, so that the requirements of different working conditions of the down-the-hole drill can be met only by adopting a high-speed and small-displacement motor, the mechanical efficiency of a hydraulic motor is improved, the working oil consumption of the whole machine is reduced, the oil tank capacity of the whole machine is reduced, and the cost of the whole machine is reduced; in addition, the multi-stage planetary gear train structure is compact in overall structure, high in rigidity and high in impact resistance, and the service life of the driving device is prolonged.

The invention provides a powder metallurgy material and a preparation method thereof, a friction pair part and a suspension gear pump, and belongs to the technical field of powder metallurgy. According to the total mass of the powder metallurgy material being 100 wt%, the powder metallurgy material comprises the following components of 0.4 wt%-0.8 wt% of carbon, 0.8 wt%-1.2 wt% of sulfur, 15 wt%-25 wt% of copper, 1.2 wt%-1.8 wt% of molybdenum, 0.01 wt%-0.06 wt% of chromium, 0.01 wt%-0.06 wt% of nickel and the balance iron. The powder metallurgy material disclosed by the invention has the advantages of self-lubricating property, low friction coefficient, low energy consumption and high mechanical efficiency of a product assembly. Compared with a copper alloy material in the prior art, the powder metallurgy material is light in weight; the cost of raw materials is low, and the cost of the suspension gear pump can be reduced; in addition, the manufacturing process of the powder metallurgy material is simple, the production efficiency is high, and the cost of friction pair parts and the suspension gear pump can be reduced.

The invention relates to a gas compressor performance prediction method and device, equipment and a medium. The method comprises the following steps: acquiring multi-dimensional data of an internal flow field and an oil supply loop, and generating an operation state vector through time-space alignment, multi-source fusion and redundancy elimination; utilizing a convolutional neural network to extract dynamic coupling features, and combining a feature analysis rule and a long-short term memory network to obtain an airflow dynamic change trend; then airflow characteristics are extracted, a mechanical efficiency estimated value is obtained through a long short-term memory network in combination with oil supply parameters, and meanwhile a deviation correction coefficient is calculated through a support vector machine model; and finally, adjusting an estimated value by using a correction coefficient, evaluating risks by combining an oil pressure fluctuation mode and an airflow state, and optimizing model parameters to generate a performance prediction path. By adopting the method, the problem that the dynamic coupling of the flow field and the oil supply loop is difficult to capture can be solved, support is provided for fault early warning and maintenance decision, the risk of unplanned shutdown can be reduced, and the operation efficiency and safety of equipment are improved.

The present application provides a kind of swing hydraulic cylinder, including cylinder barrel, drive shaft is equipped in the cylinder barrel, drive shaft is equipped with vane between cylinder barrel, vane is connected with drive shaft, torque output block is equipped on the vane, torque output block is connected with drive shaft by passing through cylinder barrel and vane, fixed block is also equipped in the cylinder barrel, fixed block is connected with the inner wall of cylinder barrel, first oil cavity is equipped above the fixed block, second oil cavity is equipped below, first oil nozzle and second oil nozzle are equipped on the outside of cylinder barrel, first oil nozzle is communicated with first oil cavity, second oil nozzle is communicated with second oil cavity, front cover is equipped in one end of cylinder barrel, rear cover base is equipped in the other end; It can improve the output torque and mechanical efficiency of swing hydraulic cylinder greatly shortens the force arm of hydraulic cylinder output shaft, according to need, the number of vane can be selected, so that different swing angle and torque are obtained, the scope of application is wide, and it is suitable for popularization and use.

This invention discloses an intelligent variable frequency control system for a centrifugal pump operating under varying conditions, belonging to the field of marine engineering. It includes: a variable frequency controller for controlling the operation of the pump's variable frequency motor; a pump driven by the variable frequency motor; a ship draft detection sensor for detecting the water level outside the ship's hull near the pump's location; a pump outlet pressure detection sensor for detecting the pump outlet pressure; and a pump inlet pressure detection sensor for detecting the pump inlet pressure. Based on the signals collected by the sensors, the variable frequency controller calculates the actual operating head of the pump and, according to the correspondence between the actual operating head and the current operating frequency, uses a fuzzy algorithm to deduce a set frequency, controlling the pump to operate at the set frequency. This invention achieves intelligent frequency regulation and speed change through a fuzzy algorithm, resulting in smooth and stable variable frequency operation, ensuring the pump always operates along the optimal mechanical efficiency curve, saving energy, minimizing impact on the power grid, and extending equipment lifespan.