72 results about "Mechanical efficiency" patented technology

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 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 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.

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.

The utility model discloses a high leakproofness die structure for aluminum alloy semi-solid die casting, which comprises a fixed die and a feeding assembly, the middle of the bottom of the right side of the fixed die is provided with the feeding assembly, the edge of the right side of the fixed die is fixedly connected with a first fixed block, and the middle of the right side of the first fixed block is provided with a groove. A first fixing block, a sliding block, a connecting rod and a spray head are arranged, the first fixing block is installed on the right side of a fixed mold, the sliding block is inserted into the middle of the first fixing block, the connecting rod is arranged on the outer side of the sliding block, and the spray head is arranged at the other end of the connecting rod and faces the inner side of the left side face of the fixed mold. In the reciprocating motion that the movable die moves close to and away from the fixed die, lubricating oil is evenly smeared on the piston rod, the friction resistance of moving of the movable die is reduced, the mechanical efficiency is improved, the sealing performance of the piston rod is enhanced, and oxidation and other corrosion are prevented.

The application relates to the field of oil drilling, and discloses a drill pipe centralizer. The drill pipe centralizer comprises a body, a supporting arm arranged on the outer wall surface of the body, and a contact surface arranged at the top of the supporting arm and used for contacting a well wall. The cross section of the contact surface on the vertical surface in the axial direction of the body is arc-shaped. The contact surface of the supporting arm is in contact with the well wall through the arc surface, the scraping between the contact surface and the actually uneven well wall is reduced, the accumulation of the torque on the drill pipe and the torque fluctuation impact are effectively reduced, the problem that the drill pipe centralizer causes the accumulation of the torque on the drill pipe is solved, the torque on the drill pipe is reduced, the drill bit is protected, and the mechanical efficiency of the drill pipe is improved.

An engine-assisted drive unit with a built-in 6-speed automatic transmission in a bicycle wheel hub is disclosed. A small, electronically fuel-injected 4-stroke internal combustion engine, a planetary gear automatic transmission, a starter motor and generator, and an oil lubrication, cooling, and exhaust purification system are integrated into the hub housing within the rear wheel rim of a standard bicycle. The flattened hub housing is located inside the rear fork of the bicycle frame, maintaining the original bicycle shape in its structure and appearance. The internal combustion engine auxiliary power unit employs a concentric circle intake and exhaust valve SOHC valve train, improving intake efficiency by 100%. The engine boasts high power density and is compatible with using biosynthesized renewable fuels such as methanol as a power source. The 6-speed automatic transmission module is integrated into the standard bicycle, providing smooth transmission, high mechanical efficiency, and advanced technology. Its simple appearance and flexible construction meet the lightweight requirements of riding assistance power equipment; it achieves the function and purpose of efficient and easy driving, making it suitable as a personal lightweight transportation tool for both urban and rural areas.

The utility model provides a stator frame, a motor stator, a rotating motor and a carrier, the outer surface of the stator frame is provided with a winding groove extending around the circumference of the stator frame, the side wall of at least one side of the winding groove is provided with an inclined transition part, the inclined transition part is provided with a guide surface, and the guide surface is arranged towards the bottom wall of the winding groove and the opposite side wall. And the side wall of the corresponding side of the winding groove is connected between the guide surface and the bottom wall of the winding groove. Compared with a flat bottom type winding groove, the winding groove of the stator framework provided by the utility model has more winding space, and compared with an arc bottom type winding groove, the fall between the outer end of the winding groove and the opening at the inclined transition part is smaller, so that an inductance coil is easier to approach to the corner of the winding groove during winding; and the straight side wall between the guide surface and the bottom wall of the winding groove can support the inductance coil to prevent the edge winding from collapsing, so that the fullness rate of the winding groove is improved, and the service life and the mechanical efficiency of the rotating motor are ensured.

The application provides a design method of high-efficiency submersible flow pusher, which comprises the following steps: determining the diameter D of the impeller and the axial velocity V at the disc surface according to the flow pushing distance and the flow disturbance diameter ′ ; calculating the flow at the disc surface per second and per hour and the thrust T of the impeller; preliminarily selecting the rotating speed n of the impeller; calculating the power required by the flow pushing fluid and estimating the power of the power system according to the mechanical efficiency N%; selecting a suitable power system; if the rotating speed of the power system cannot match the rotating speed n of the impeller, repeatedly modifying the rotating speed n of the impeller until the rotating speed of the impeller is the same as the rotating speed of the power system, so that the impeller and the power system can be completely matched; and finally designing and fixing the installation and fixing device. The axial velocity at the disc surface of the impeller and the thrust per unit area at the disc surface are taken as the design indexes, and the design method of the submersible flow pusher is first proposed. The submersible flow pusher designed by the method has large water flow speed and large flow pushing flow, and the power consumption is lower.

The present invention relates to a system designed to enhance the thermomechanical efficiency of internal combustion engines while reducing emissions, noise, and maintenance requirements. The system comprising a booster, soft ferrite coils, a magnetic pick-up, and a feedback mechanism increases energy density within the engine. This enables operation on lean fuel mixtures, continuous removal of carbon deposits, improved combustion, and minimized pressure drops, thereby enhancing efficiency and reducing wear. The system reduces noise, vibrations, and particulate emissions under constant or variable engine conditions. By optimizing fuel consumption and reducing back pressure, it promotes cleaner, quieter, and sustainable engine operation while improving catalytic converter lifespan and achieving overall performance gains.

This invention discloses a high-mechanical-efficiency multi-start worm gear reducer, relating to the field of multi-start worm gear reducers. It includes a protective housing, with a support frame fixedly connected to the upper end of the protective housing. A storage box is fixedly connected to the upper end of the support frame, and a connecting pipe is fixedly connected to the lower center of the storage box. Through the arrangement of the storage box and the adjusting box, when the lubricating oil between the upper worm gears is exhausted during operation, an adjusting roller is pushed. The adjusting roller slides within a sliding groove, and air from the factory enters the connecting pipe through a vent pipe. Under the conditions of height and air pressure, the lubricating oil in the storage box is squeezed out, and one end of the feed pipe drips the lubricating oil onto the first worm gear reducer shaft. The cooperation between the storage box and the adjusting box allows lubricating oil to be added between the first worm gear reducer shaft and the drive worm shaft, thereby reducing the probability of damage to the worm gears during operation.

The utility model discloses an immersed tube and vibroflotation device which comprises a vibroflotation device body and an immersed tube device, and the vibroflotation device body comprises a vibroflotation head and a vibroflotation connecting rod connected to the vibroflotation head. The vibroflotation device comprises a vibroflotation device body and a vibroflotation connecting rod, the vibroflotation device body is connected with the vibroflotation device body through a flange, the vibroflotation device body is connected with the vibroflotation device body through a flange, the vibroflotation device body is connected with the vibroflotation device body through a flange, the vibroflotation device body is connected with the vibroflotation device body through a flange, and padding can be conveyed to the end of a pile through the feeding port. Through combination of pipe sinking equipment and the vibroflot body, feeding and other work in the construction process can be effectively completed, the pipe sinking protective cylinder can move up and down along with the vibroflot body, the situation that due to the process requirement, the vibroflot body and the pipe sinking protective cylinder cannot be synchronously operated, the mechanical efficiency is reduced is avoided, the mechanical construction efficiency is overall improved, and the construction quality is guaranteed; and a certain popularization value is achieved.

The utility model discloses a marine propeller gearbox, which belongs to the technical field of marine propellers, and comprises a main box shell, a shaft pipe sleeve is fixedly mounted at the bottom end of the main box shell, a lower box shell is fixedly mounted at the bottom end of the shaft pipe sleeve, a clutch mechanism is arranged in the main box shell, and the lower box shell is fixedly mounted at the bottom end of the shaft pipe sleeve. A gear shifting mechanism is arranged in the main box shell, and a transmission mechanism is arranged in the shaft pipe sleeve and the lower box shell. The clutch mechanism and the gear shifting mechanism are arranged, the wet-type multi-plate clutch is adopted as a core component of the clutch mechanism, the clutch is composed of a plurality of metal friction plates and a pressing device, the metal friction plates are arranged alternately, the friction plates are soaked in lubricating oil, and the lubricating oil not only plays a cooling role, but also can provide a more stable friction coefficient. According to the utility model, the gear shifting mechanism and the transmission mechanism are arranged, and the horizontal shaft design is used, so that the use cost is reduced.

The embodiment of the utility model provides an alignment platform and electromechanical equipment. The alignment platform and the electromechanical equipment are used for ensuring that two parts can be accurately aligned in machining, assembling or inspection. The first platform and the second platform are driven by a first driving device to move relatively in the first direction through a first rolling guide assembly, and the first rolling guide assembly comprises two sets of first sliding guide parts in rolling fit with the first rolling fit parts. The second platform and the third platform are driven by a second driving device to move relatively in the second direction through a second rolling guide assembly, and the second rolling guide assembly comprises two sets of second sliding guide parts in rolling fit with the second rolling fit parts. Through the arrangement, on one hand, the structure of the guiding device is optimized, compared with sliding guiding, rolling guiding can reduce power consumption, improve mechanical efficiency and facilitate maintenance and starting, on the other hand, the number and layout of the sliding guiding devices are optimized, deformation and vibration in the working process are reduced, and the alignment precision and working quality of electromechanical equipment are improved.

A steel profile, comprising a protruding small narrow surface provided on an upper surface of a substrate or a boss. The present invention can reduce a contact area, reduce frictional force, and improve mechanical efficiency.

The invention provides a high-strength bamboo wood preparation method, and belongs to the technical field of bamboo wood preparation methods. Comprising a machine body, one end of the machine body is fixedly connected with a lifting assembly, the lifting assembly is used for assisting in moving bamboo canes, and the lifting assembly is connected with the machine body; and the continuous assembly is used for assisting in continuous feeding of the bamboo canes, and the continuous assembly is connected with the machine body. By arranging the lifting assembly and the continuous assembly, the continuous assembly not only can improve the continuous operation efficiency of the machine, but also can assist in feeding; the lifting assembly not only can quickly clamp one end of the bamboo strip, but also can replace manpower to automatically lift the bamboo strip to the feeding port, and compared with manual handheld feeding, the arrangement can reduce contact between workers and the bamboo strip and reduce the risk that the hands are scratched by burrs of the bamboo strip, the mechanical efficiency can be fully exerted, and the machining efficiency is improved.

A cleaning and caring appliance and a transducing apparatus thereof. A transducer includes a transducer frame and magnets attached to the transducer frame, an elastic assembly and a drive shaft, the elastic assembly includes a transmission arm and an elastic piece held by the transmission arm, and the transmission arm is fixedly connected to the drive shaft, the elastic piece has an outer edge and an inner edges, corresponding to a holding portion of the transmission arm, a recess is formed on the transmission arm, and a recess depth D of the recess is greater than a first fixed coupling width B1 from a bottom surface of the recess and a longitudinal axis. The solution avoids the suppression of a harmonic vibration rotation angle by damping during a harmonic motion, allowing a cleaning assembly such as a brush head to have a larger rotation angle and improving the mechanical efficiency.

The utility model discloses an engine assembly and a vehicle, the engine assembly comprises an engine and a supercharger, and the engine is connected with an air inlet pipeline; the supercharger is arranged on the air inlet pipeline and is an electric vortex supercharger. According to the engine assembly provided by the embodiment of the utility model, the supercharger is the vortex supercharger, so that compared with a turbocharger in the related technology, the vortex supercharger is better in sealing performance and higher in mechanical efficiency, and higher-performance supercharging can be realized; moreover, the electric vortex supercharger is driven to work through electric power, the working condition of the electric vortex supercharger can be decoupled from the rotating speed of the engine, and compared with a pneumatic supercharger in the related technology, the response speed is higher, the working range is wider, and wider calibration strategy selection can be provided.

The application discloses a kind of composite brake distribution method and device of multi-axle commercial vehicle.The method, dynamics analysis is carried out, and the whole vehicle demand brake torque and single axle demand brake torque are determined.According to driving behavior data, the required braking mode is determined.In the case of hydraulic braking, according to the single axle demand brake torque, the brake torque supplied by the hydraulic system to each axle is distributed.In the case of composite braking, according to the distribution characteristics of motor mechanical efficiency and battery charging efficiency, the maximum regenerative braking torque that the motor can provide is determined.According to the relative relationship between the maximum regenerative braking torque and the whole vehicle demand brake torque, the compensation brake torque provided by the hydraulic system and the regenerative braking torque provided by the motor are determined in the case of required braking mode being composite braking.According to the single axle demand brake torque, regenerative braking torque and compensation brake torque, the brake torque supplied by the hydraulic system and the motor to each axle is distributed.The scheme guarantees the safety of braking and improves the braking effect.

The present application provides a cleaning care appliance and a transducer device thereof. The transducer comprises a transducer frame, a magnet, an elastic assembly and a drive shaft attached to the transducer frame, and the elastic assembly comprises a transmission arm and an elastic piece held by the transmission arm, wherein the transmission arm is fixedly connected with the drive shaft, the elastic piece has an outer edge and an inner edge corresponding to the holding part of the transmission arm, the transmission arm forms a recess, and the inner recess depth D of the recess is greater than the first fixed connection width B1 between the bottom surface of the recess and the longitudinal axis. The scheme avoids the inhibition of the damping in the resonance motion on the resonance rotation angle, so that the cleaning assembly such as the brush head can have a larger rotation angle, and the mechanical efficiency is improved.

The high-efficiency impact engine is based on an impact water turbine principle machine, a fire-fighting lance nozzle with the efficiency of converting internal potential energy into jet kinetic energy being 92% or above serves as a prototype nozzle, the actually measured mechanical efficiency is 90% or above (except friction force), and countless experiment conclusions of professionals are overridged (the theory of the impact water turbine principle machine is correct, and the efficiency of the fire-fighting lance nozzle is higher than 92%). The actual mechanical efficiency is about 50%); the energy force and speed conversion efficiency of the efficient impact engine is higher than that of an impact mixed-flow impeller, the actual mechanical efficiency is higher than that of the mixed-flow impeller, the engine is the engine with the highest theoretical actual measurement mechanical efficiency in the world at present, and the calculation formula is a common teaching material formula.

A seven-star wheel is arranged at the center of a plunger shell, seven plunger assemblies are arranged between the seven-star wheel and a mounting hole in the side wall of the plunger shell, and a main shaft bearing A is arranged at the front end of the seven-star wheel on a crankshaft through a shaft end seal; a spindle bearing B is arranged at the position, between the crankshaft and the flow channel shell, of the rear end of the seven-star wheel, a flow distribution disc and a flow distribution inner end cover are sequentially arranged at the rear end of the seven-star wheel, seven flow distribution holes are formed in the position, shielded by the flow distribution disc, of the flow channel shell in a surrounding mode with the crankshaft as the circle center, and each flow distribution hole is connected with one plunger assembly through a flow distribution channel arranged in the flow channel shell. The high-water-base hydraulic motor is simple in structure, the eccentric swing type valve plate is adopted, the valve plate shields the plunger valve holes through swing and directly cuts off the valve channels of the plungers, the abrasion of the valve plate is small, the rotating speed range of the high-water-base hydraulic motor is widened, the volume efficiency, the mechanical efficiency and the working reliability of the high-water-base hydraulic motor are improved, and the service life of the high-water-base hydraulic motor is prolonged.

This invention discloses a three-degree-of-freedom joint actuator with multi-drive, graded output and spherical rotation, comprising: a motor section, a gear section, and an output shaft. The motor section includes a left motor, a middle motor, and a right motor; the gear section includes a differential bevel gear assembly and a spherical gear assembly, with the differential bevel gear assembly connected to the left and right motors, and the spherical gear assembly connected to the middle motor; one end of the output shaft is coupled to the differential bevel gear assembly and the spherical gear assembly. The input power of the left and right motors is transmitted to the output shaft through the differential bevel gear assembly, and the input power of the middle motor is transmitted to the output shaft through the spherical gear assembly, thereby achieving graded power output, and the motion trajectory surface of the output shaft is spherical. This invention achieves high energy density and high mechanical efficiency in a compact form, a spherical actuator motion trajectory, and three-degree-of-freedom rotational motion without mechanical structural compromises, thus mimicking hip joint movement.

This application discloses a mechanical efficiency testing system, method, apparatus, equipment, and medium, relating to the field of hybrid-specific transmission testing technology. The system includes a hybrid-specific transmission and a bench testing device. The bench testing device includes an engine-side dynamometer, a drive motor-side dynamometer, and a bench control module. The bench control module is configured to acquire the vehicle control logic, which controls the hybrid-specific transmission to perform bench testing in a preset mode. The hybrid-specific transmission operates based on a working mode indicated by a first control signal; the engine-side dynamometer operates based on a working mode indicated by a second control signal; and the drive motor-side dynamometer operates based on a working mode indicated by a third control signal. The bench control module collects test data and determines the mechanical efficiency of the hybrid-specific transmission corresponding to the vehicle control logic based on the test data. This system can directly test the mechanical efficiency of the hybrid-specific transmission, improving the accuracy of the test results.