127results about How to "Large thrust" patented technology

The invention discloses a multi-channel numerical control grinding machine tool for machining an outer spherical surface structure of a ball head, and relates to a grinding system for machining an outer spherical surface of a medical thighbone ball head. The multi-channel numerical control grinding machine tool is high in machining precision and production efficiency. The multi-channel numerical control grinding machine tool comprises a composite workbench and a linear servo driving module, wherein a workpiece servo main shaft module is arranged on the composite workbench; a grinding servo main shaft module is arranged on the linear servo driving module; the composite workbench comprises a vertical servo rotating shaft, and a workpiece servo feeding sliding table is arranged on the vertical servo rotating shaft. The workpiece servo main shaft module comprises a workpiece inner positioning and clamping fixture; an automatic online detection module is arranged on one side of the workpiece servo main shaft module; a linear servo sliding table is arranged on the linear servo driving module, and power of the linear servo sliding table is provided by a linear motor; a grinding floating cutter handle is installed on the grinding servo main shaft, and a cutter assembly is installed on the grinding floating cutter handle.

The invention discloses a multifunctional electric propulsion system of a spacecraft, and relates to the technical field of space propulsion systems. The multifunctional electric propulsion system comprises a gas cylinder module, a fluid management module and a thruster module. The downstream of the gas cylinder module is connected with the fluid management module; the downstream of the fluid management module is connected with the thruster module; the thruster module comprises a Hall thruster, an electric heating type thruster and a cold air thruster. The low-cost working medium gas is utilized, the attitude control system and the orbit control system of the satellite are integrated through modular design and heat flow design, the design and manufacturing difficulty of the satellite is lowered, the launching cost of the satellite is reduced, and meanwhile the integrated control system is combined with an orbit control algorithm, so that intelligent control over the satellite can be achieved.

The invention discloses a full-static-pressure ultra-precise double-head spindle, which relates to the technical field of machine tool spindles and comprises a mandrel, a shaft sleeve is fixedly connected to the outer surface of the mandrel, a spindle equipment compartment is rotatably connected to the outer surface of the shaft sleeve, a synchronous pulley is fixedly connected to one side of the outer surface of the shaft sleeve, and a transmission assembly is in transmission connection to the synchronous pulley. The synchronous belt wheel is sleeved with a belt cover, the belt cover is fixedly connected into the main shaft equipment compartment body, and a transmission assembly looseness abnormity early warning mechanism is arranged in the belt cover and can automatically trigger an alarm to remind workers when the transmission assembly is loosened. The situation that the core shaft breaks down due to the fact that the transmission assembly falls off and is broken can be reduced, the maintenance cost of the core shaft is reduced, the service life of the core shaft is prolonged, the situation that vibration and noise are generated when the core shaft works under the abnormal condition of the transmission assembly can be avoided, the stability of the core shaft in the operation process is guaranteed, and the service life of the core shaft is prolonged. Therefore, the product grinding precision and quality of the mandrel are improved.

According to the hydrofoil sliding control method and device and the cross-medium unmanned aerial vehicle, the immersion depth of a hydrofoil is obtained through a pressure sensor and a water level gauge which are installed on the hydrofoil, the hydrofoil is kept at the given immersion depth through the designed control method, so that other parts installed on the hydrofoil can be accurately located above the water surface, resistance is reduced, and the hydrofoil sliding control method is suitable for the unmanned aerial vehicle. The propellers of the hydrofoils are kept below the water surface, and the propeller blades are completely immersed, so that the maximum thrust can be provided during sliding, and the quick sliding of the cross-medium unmanned aerial vehicle on the water surface is realized.

The invention relates to the technical field of machine tool precision control, in particular to a device for adjusting the friction torque of a ball screw, a machine tool for adjusting the friction torque of the ball screw and a method for adjusting the friction torque of the ball screw. The device comprises a ball screw, a prefabricated grinding nut and a jacking piece, the prefabricated grinding nut is used for grinding the ball screw, the shape of the prefabricated grinding nut is matched with that of the ball screw, and the prefabricated grinding nut is tightly attached to a ball screw raceway; the jacking piece is connected with the prefabricated grinding nut and drives the prefabricated grinding nut to be close to or away from the ball screw. When the nominal diameter of the ball screw changes in the working process, the ball screw is ground through the prefabricated grinding nut. The device can control the friction torque of the ball screw nut pair in real time, the stability of a machine tool in the operation process is effectively improved, and the machining quality is improved.

The utility model belongs to the technical field of drilling machine equipment, and particularly relates to a tower structure for a three-level telescopic 6.6 m to 15 m drilling machine, which comprises an outer tower, a middle tower, an inner tower, a sliding frame, a power head, a lifting mechanism and a transmission mechanism, the outer tower, the middle tower and the inner tower are all provided with sliding rails, the middle tower is slidably connected with the outer tower through the sliding rails, and the sliding frame is connected with the power head. The inner tower is slidably connected with the middle tower, the sliding frame is slidably connected with the inner tower, the power head is fixedly connected with the sliding frame, the lifting mechanism comprises a first-stage telescopic oil cylinder and a second-stage telescopic oil cylinder, the two ends of the first-stage telescopic oil cylinder are fixedly connected with the outer tower and the middle tower respectively, and the two ends of the second-stage telescopic oil cylinder are fixedly connected with the inner tower and the sliding frame respectively. The transmission mechanism comprises a first-stage pulley block, a second-stage pulley block, a third-stage pulley block, a first-stage leaf chain, a second-stage leaf chain and a third-stage leaf chain. The device has the advantages that one-time drilling lifting of a drill rod within 15 meters is achieved, and the production, manufacturing and transportation problems such as section bar length limitation and welding thermal deformation are solved.

The invention relates to a four-wing threshold valve control hydraulic system for a vertical drilling tool, which comprises a high-pressure oil way and a low-pressure oil way which are arranged in the vertical drilling tool, a first control system, at least one two-position three-way electromagnetic valve, and a hydraulic cylinder and a piston assembly which are arranged corresponding to the two-position three-way electromagnetic valve, wherein each two-position three-way electromagnetic valve comprises a first passage, a second passage and a third passage, the first passage is communicated with the high-pressure oil way, and the second passage is communicated with the low-pressure oil way; the hydraulic cylinders and the piston assemblies are communicated with third passages of the corresponding two-position three-way electromagnetic valves; and the first control system is configured to switch the communication between the hydraulic cylinder and the piston assembly and the high-pressure oil way or the low-pressure oil way by controlling the conduction of the first passage, the second passage and / or the third passage according to the well deviation condition of the vertical drilling tool so as to execute corresponding deviation correction operation. According to the system, space is saved, and deviation correction and anti-friction acceleration can be reasonably considered to the maximum extent.

The utility model relates to the technical field of vacuum gate valves, in particular to a novel vacuum gate valve which comprises a vacuum gate valve box with a feeding hole, a valve plate is arranged in the vacuum gate valve box, a sealing ring is adhered to the end face of one end of the valve plate, and the end face of the other end of the valve plate is fixedly connected with a driving connecting rod. The bottom of the driving connecting rod is connected with the driving end of the vertical air cylinder, the fixed end of the vertical air cylinder is slidably connected with the inner wall of the vacuum gate valve box, the outer surface of the driving connecting rod is connected with the connecting plate, the horizontal air bag is arranged between the connecting plate and the interior of the vacuum gate valve box, and the horizontal air bag is controlled to expand through a corresponding air pump. The connecting plate can be pushed to move forwards, the sealing ring connected with the valve plate and the vacuum gate valve box are attached together so as to achieve the sealing purpose, and the horizontal air bag is of a tire-like structure, so that compared with an air cylinder, the horizontal air bag is better in flexibility, larger in thrust, flexible in arrangement and not limited to a circle or an ellipse. And the size and the complexity of the system are reduced.

The present invention belongs to the technical field of dynamic strength testing, and specifically refers to a dynamic performance testing device for an industrial robot, including a manipulator body, a sliding adjustment type offset sensing mechanism, a swinging universal preload mechanism, and an adaptive clamping and positioning mechanism. When the manipulator body moves rapidly, the present invention can enter a position sensing state: at this time, the position of the sliding base can be automatically locked and fixed, and the positioning clamping plate will automatically move away from the positioning collar, thereby avoiding affecting the movement of the positioning collar; and when the manipulator body is stationary or slowly adjusted, it will enter a follow-up adjustment state: at this time, the position of the sliding base is automatically unlocked, and the positioning clamping plate will automatically approach and clamp the positioning collar, so that the position of the sensing collar can always be adjusted following the adjustment of the positioning collar.

The invention discloses a methane pre-cooling fuel gas generator circulation turbine enhanced combined power system which comprises a fuel turbine, a heat exchanger, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator and a gas generator, and is characterized in that the heat exchanger is used for providing heat for fuel from a fuel pump and conveying high-temperature fuel gas to the fuel turbine so as to drive the fuel turbine to rotate; the oxidant turbine is used for driving the oxidant turbine to rotate by taking the high-temperature fuel gas output by the heat exchanger and the high-temperature fuel gas flowing out of the fuel turbine as power, so that the oxidant turbine drives the oxidant pump to work; high-temperature fuel gas obtained after the fuel from the fuel pump is heated by the heat exchanger is also used for being converged with high-temperature fuel gas sequentially passing through the fuel turbine and the oxidant turbine and then entering the fuel gas generator; liquid methane is adopted for precooling incoming flow, the total temperature of incoming flow behind an air inlet channel is effectively reduced, the upper limit of the working Mach number of the turbine core machine can be expanded to be larger than Ma3.5, a stamping mode matched with the turbine core machine only needs to consider the working speed range larger than Ma3.5, and the working performance of the turbine core machine can be well released.

The utility model relates to the technical field of grouting pipelines, and discloses a backflow prevention device for a post-grouting pipeline, which comprises a pipe body, a grouting port is arranged at the upper end of the pipe body, a grout outlet is arranged at the lower end of the outer wall of the pipe body, a moving block is slidably connected to the lower end of the inner wall of the pipe body, and a circular groove is arranged at the bottom of the moving block. The top of the inner wall of the circular groove is fixedly connected with a spring, the lower end of the spring is fixedly connected with the bottom of the inner wall of the pipe body, and the top of the moving block is fixedly connected with a connecting block. According to the backflow preventing device for the post-grouting pipeline, when grouting is stopped, the moving block can move upwards under the action of the spring, the moving block drives the baffle to move upwards through the connecting block while moving upwards, and through the arrangement, the backflow preventing device has the advantages that after grouting of the grouting pipeline is stopped, the baffle can move to the position above a grout outlet under the action of the spring, and therefore the backflow preventing effect is achieved. Therefore, a good sealing effect on the grouting pipeline is achieved, the situation that cement grout flows back is effectively prevented, the backflow control efficiency is high, and the cost is low.

The invention discloses a steel coil elevator, which belongs to the technical field of steel coil transportation, and in the running process of the steel coil elevator, an oil cylinder can enable a car to stably ascend or descend without generating violent shaking or impact, which is crucial for protecting a steel coil and other equipment in the elevator. Due to the fact that the steel coil is a cargo with the high requirement for transportation stability, any excessive shaking can cause displacement, collision and even damage of the steel coil, the limiting plug pin is arranged when the steel coil is lifted to the limit position, it is guaranteed that the steel coil can be stably transferred at the lifting limit position, accurate control can be achieved, and the safety coefficient is high. The lifting speed of the oil cylinder can be accurately controlled by adjusting the flow of the hydraulic oil, and the speed of the oil cylinder can be conveniently adjusted by installing corresponding control elements such as a hydraulic valve and the like in different working scenes, for example, the stable speed is needed when a steel coil is loaded, and the high speed is possibly needed under the no-load or emergency condition.

The invention relates to the technical field of wire harness production and wire separation, and discloses a wire separation device for refrigerator sensor wire harness production, which comprises a wire separation device body, and one side of the wire separation device body is provided with a tension adjusting mechanism, a fixed conveying mechanism, an unwinding cutting mechanism and a height adjusting mechanism. The tension adjusting mechanism comprises a supporting seat, a first bearing, a threaded cylinder, a first worm gear, a threaded rod, a limiting telescopic rod, a fixing plate, a first rotating rod and a guide roller. The threaded rod drives all parts on the supporting frame to ascend and descend, so that tension adjustment can be conducted according to actual wire conveying requirements, wires can be kept at the stable position in the conveying process through appropriate tension, shaking and deviation caused by looseness or over-tightness are avoided, and therefore when the wire separating device body conducts wire separating operation in the follow-up process, the wire separating efficiency is improved. The cutter can accurately act on the specific position of the wire, the position precision of branching is ensured, and the branching deviation is reduced.

The utility model relates to the field of fireworks, and discloses a high-thrust firework which comprises a launching cylinder, sealing paper is fixedly connected to the top end of the inner wall of the launching cylinder, an ignition assembly is arranged on the upper portion of the sealing paper, and a launching assembly is arranged in the launching cylinder. The launching assembly comprises an effect inner cylinder, the effect inner cylinder is pressed at the bottom end of the inner wall of the launching cylinder, a blocking paper sheet is fixedly connected to the middle section of the inner wall of the effect inner cylinder, and a cavity is formed in the inner wall of the effect inner cylinder; the portion, located above the blocking paper piece, in the effect inner cylinder is sequentially filled with propellant powder, clay knots and acousto-optic powder from bottom to top. According to the utility model, the propellant powder is filled in the lengthened effect inner cylinder, so that the thrust transmission path is shortened, the energy loss caused by a gap between the launching cylinder and the effect inner cylinder is reduced, and under the condition of the same propellant powder amount, larger upward thrust can be generated, and the firework launching height can be increased.

This invention discloses a method for evaluating the multi-dimensional coupling aerodynamic performance of a modal selector valve and an engine, belonging to the field of aero-engines. The steps are as follows: establishing a three-dimensional model of the modal selector valve; simulating the model to obtain its flow performance; establishing a computational model of the modal selector valve and calculating the total pressure after the valve; integrating a high-fidelity characteristic calculation model of the component with a zero-dimensional model of the entire engine; inputting the engine's design point performance parameters and performing design point calculations; given the engine control law and the engine's non-design point operating conditions, performing calculations; determining the convergence of the computational model; obtaining the engine characteristic diagram and aerodynamic performance under arbitrary operating conditions, thus obtaining the aerodynamic performance results considering the overall coupling effect of the modal selector valve and the engine. This invention solves the problems in existing technologies where the calculation accuracy of the overall performance calculation code for variable cycle engines cannot meet the design requirements of variable cycle engines, and the coupling of various engine components is poor.

This utility model belongs to the field of feeding technology, specifically a feeding structure for tableware forming, including a preheating machine body, a box cover rotatably connected to the top of the preheating machine body; a fixed seat is provided on the side wall of the preheating machine body; a motor is fixedly connected to the middle of the fixed seat; a circular plate is fixedly connected to the output end of the motor; multiple switching plates are fixedly connected to the side wall of the circular plate; a processing table is provided on the side wall of the fixed seat; a pair of rotating grooves are opened on the side wall of the switching plates; a baffle is rotatably connected to the middle of the rotating groove; the baffle and the rotating groove are connected by a torsion spring; a feeding plate is fixedly connected to the side wall of the fixed seat; a guide plate is rotatably connected to the end of the feeding plate; the guide plate and the feeding plate are connected by a torsion spring; by using a motor to control multiple switching plates, feeding can be carried out when the raw material is picked up, so that the next batch is connected after one batch is picked up, thereby increasing the feeding continuity and making the feeding faster, thus speeding up the operation of the raw material.

The device is arranged in the combustion chamber, a flame tube is arranged in the combustion chamber, and the device comprises a high-pressure fuel spray pipe and a concentric-square-shaped evaporation pipe; the high-pressure fuel spray pipe penetrates through the side wall of the combustion chamber and is connected with a high-voltage power supply to serve as an anode; the concentric-square-shaped evaporation pipe penetrates through the side wall of the flame tube to serve as a cathode; an anode oil spraying opening of the high-pressure fuel oil spraying pipe and a cathode expanding type fuel oil opening of the concentric-square-shaped evaporation pipe are coaxially arranged, and the end of the anode oil spraying opening extends into the cathode expanding type fuel oil opening. Through high-voltage arc discharge, fuel oil is physically promoted to be split into tiny liquid drops, and macromolecular fuel oil is partially split into micromolecular fuel with higher chemical activity, so that the chemical reaction rate is greatly increased, and rapid and sufficient combustion of the fuel oil is realized.

The invention relates to the technical field of rigid-flex board manufacturing, and discloses a rigid-flex board pressing process, which comprises the following steps: S1, material preparation: preparing a flexible circuit layer which is usually made of a polyimide material; preparing a rigid circuit layer, which is usually made of an FR-4 material; an adhesive layer is prepared for bonding the flexible layer and the rigid layer together. According to the invention, the fixing frame and the carrier plate which can be separated are arranged, and when the rigid-flex board is pressed and the carrier part bearing the rigid-flex board drives the rigid-flex board to move towards the blanking direction, the carrier plate gradually moves to a slotting area; therefore, when the carrier plate moves to the slotting area and exceeds the position of the center line of the carrier plate, the carrier plate can rotate towards the lower portion of the fixing frame due to gravity, the pressed rigid-flex board borne by the upper surface of the carrier plate can slide to the upper surface of the material receiving plate along the inclined carrier plate gradually when the carrier plate rotates, and discharging operation is completed.

The utility model relates to the technical field of bank protection sheet piles, in particular to a channel bank protection sheet pile structure which comprises a first sheet pile which is sequentially arranged and connected, the first sheet pile comprises a top plate, two inclined side plates and two bottom plates, the two inclined side plates are symmetrically connected to the two ends of the top plate, and the two bottom plates are connected to the tail ends of the two inclined side plates respectively and are symmetrical to each other. A first groove is formed between the two inclined side plates, the two bottom plates are parallel to the top plate, a second groove is formed between every two adjacent first sheet piles, first connecting pieces are arranged on the sides, facing the second grooves, of the inclined side plates, and second connecting pieces are arranged on the two sides of each second sheet pile. The second sheet piles are connected with the second connecting pieces located on the two sides of the second grooves through the second connecting pieces so that the second sheet piles can correspondingly shield the second grooves. And the second sheet piles bear direct impact of water waves instead of the second grooves, and thrust borne by the first sheet piles is reduced, so that the relative movement trend between the first sheet piles is reduced, the connection firmness between the first sheet piles is improved, and the service life is prolonged.

The invention discloses a rotary vane type aerodynamic booster, which belongs to the technical field of fluid machinery and comprises a fixing system, a vertical rotating system, a horizontal rotating system, a synchronous transmission system, a disc system, an upper shell system and a lower shell system. The fixing system is used for overall fixing; the synchronous transmission system is meshed with the first bevel gear through the second bevel gear, and the oblique gear is meshed with the special-shaped gear of the horizontal rotating body, so that the vertical rotating system and the horizontal rotating system synchronously rotate at a fixed proportion, and the blocking effect on an inlet is small; meanwhile, the vertical rotating system and the horizontal rotating system do uniform circular motion along respective rotating shafts, and a periodic extrusion space is formed between the two systems, so that higher pressure is generated in the space between the vertical rotating system and the horizontal rotating system, and higher aerodynamic force is generated.

The utility model discloses an ambient air monitoring device. The environment air monitoring equipment comprises a vertical rod, a foundation is installed at the lower end of the vertical rod, and a display screen is installed on one side of the vertical rod; the vertical rod comprises a first rod body and a second rod body, and a connecting rod is arranged between the first rod body and the second rod body; the foundation comprises a bottom plate fixedly installed at the lower end of the vertical rod. The display screen comprises a display assembly and a frame used for fixing the display assembly. And the frame is rotationally mounted on the connecting rod. According to the environment air monitoring equipment, in strong wind weather, wind blows on the surface of the display screen to generate large thrust on the display screen, the display screen rotates under the action of wind power until the display screen is consistent with the wind direction, the stress on the two sides of the display screen is balanced and keeps consistent with the wind direction, and meanwhile, the display screen is not damaged. The possibility that abrasive paper doped in strong wind impacts on the display screen is smaller, and therefore damage to the display screen is reduced.

The invention discloses an efficient small-scale bird-imitating ornithopter, and belongs to the technical field of ornithopters. Comprising a fuselage, a flapping wing driving device and flapping wings, the flapping wing driving device comprises a flapping wing driving mechanism and a flapping wing flapping mechanism; rocker arm gear transmission structures which are meshed with each other are arranged on the inner side of a left rocker arm and the inner side of a right rocker arm of the flapping wing flapping mechanism respectively, a flapping wing is of a full-hand-wing structure, and the wing face of the flapping wing is a complete wing face which is of an integrated bilateral symmetry structure and formed by bonding a left flapping wing framework and a right flapping wing framework into a whole through skin. The wing span of the flapping wing is 0.3 m, the span-chord ratio of the flapping wing is 4, the tip-root ratio of the flapping wing is 1, the skin of the flapping wing is a polyester film, and the framework of the flapping wing is of a carbon fiber rod structure; the diameter of the main beam is 1 mm, the diameter of the oblique beam is 0.8 mm, and the diameters of the inner side wing rib beam and the outer side wing rib beam are both 0.6 mm. The unmanned aerial vehicle has the characteristics of high flight efficiency, high integration level, convenience in use and the like.

The application relates to a double-channel rotating detonation combustion chamber structure with an inlet total pressure adjusting function, which comprises a Tesla valve arranged at the inlet of the rotating detonation combustion chamber, the Tesla valve comprises a shell and a flow channel, the inlet end and the outlet end of the flow channel are respectively provided with pressure adjusting structures, the radial outer side of the flow channel is provided with an injection channel, the injection channel comprises an air outlet channel and a pressurizing channel communicated with the air outlet channel, and the side, away from the pressurizing channel, of the air outlet channel is provided with an opening and closing assembly for opening or closing the air outlet channel, the opening and closing assembly comprises a supporting plate, a plurality of opening and closing doors and a self-locking driving part, and the self-locking driving part is used for synchronously driving the plurality of opening and closing doors to be close to or away from the outlet side of the air outlet channel. The application has the effects that when the rotating detonation combustion chamber is in an air thin belt, the air intake of the air inlet channel is automatically enhanced, the rotating detonation combustion chamber preferentially intakes the air in the air inlet channel, the air supply of the combustion chamber is ensured, and the adaptability and stability of the combustion chamber in different environments are improved.

The utility model relates to the technical field of photovoltaic tiles, and discloses a photovoltaic tile structure which comprises a tile body and a photovoltaic panel, T-shaped long strips are fixedly connected to the two sides of the bottom of the photovoltaic panel, T-shaped long grooves matched with the T-shaped long strips are formed in the two sides of the top of the tile body, and the T-shaped long grooves are fixedly connected to the two sides of the top of the tile body. The ends, away from the T-shaped long strip, of the two sides of the bottom of the photovoltaic panel are fixedly connected with T-shaped check blocks. The ends, close to the outlet, of the bottoms of the inner walls of the T-shaped long grooves are provided with limiting assemblies. According to the photovoltaic tile structure, the detachable photovoltaic panels are arranged at the top of the tile body, when the photovoltaic panels are installed, only the photovoltaic panels need to be installed on the tile body, an original roof tile structure does not need to be damaged, installation is convenient, and when one photovoltaic panel is damaged, the photovoltaic panels can be installed conveniently. And a worker only needs to independently disassemble and replace the damaged photovoltaic panel, so that the maintenance of the photovoltaic tile is more convenient.

The application relates to a spline pair pushing device for a commercial vehicle transmission shaft, which comprises a cylinder, the end of the cylinder is fixed with a first pushing plate, the movable shaft end of the cylinder is fixed with a second pushing plate, the first pushing plate and the second pushing plate are both provided with circular arc clamps, the opening directions of the two circular arc clamps are the same, and the connecting line between the centers of the two circular arc clamps is parallel to the movable shaft of the cylinder. The first pushing plate and the second pushing plate are installed at the two ends of the cylinder, the third pushing plate and the fourth pushing plate are installed at the two ends of the mechanical pushing mechanism, and the arc-shaped clamps are arranged on the pushing plates, so that the pushing plates can be clamped on the transmission shaft. When the cylinder acts, the first pushing plate and the second pushing plate push to the two ends, the torsion rod can be manually pulled, the lever action and the gear transmission effect are used, the pushing force of the device is increased, and the transmission shaft and the spline pair are pushed away from each other. The device is convenient to use, time-saving and labor-saving.

The invention provides an adjusting device, method, system and equipment for adjusting states of three red lines of an engine, and relates to the field of airworthiness verification tests of the engine, the adjusting device comprises a swirler, the swirler is arranged in an air inlet channel of the engine, and the swirler is arranged perpendicular to the axis of the engine. The swirler comprises a swirl guide vane which can rotate in the radial direction of the engine, so that the pre-swirl angle of the swirler is adjustable. According to the invention, the thrust of the engine is effectively reduced by controlling the rotation of the rotational flow guide vane, adjusting the pre-rotation angle of the swirler and reducing the flow of the outer culvert airflow of the engine, so that the engine is prevented from generating excessive thrust, and the thrust of the engine does not exceed the red line state too much when the rotating speed of the rotor reaches the red line state; the strength and the service life of key components such as an engine fan, a gas compressor and a turbine are ensured.

The utility model relates to the conduction mechanism technical field of electronic lock for electric automobile, especially an electronic lock conduction mechanism with clutch function for electric automobile, including casing, upper cover, motor assembly, double gear set, clutch assembly, unlocking slider and unlocking pull rope assembly, the clutch assembly is by clutch gear, AC clutch cam, connecting rod, DC cam, clutch compression spring and reset compression spring constitutes, clutch gear and gear set engage and axial sliding suit in connecting rod, clutch compression spring normal pressure clutch gear and AC cam engage, unlocking slider is through reset compression spring and abuts against casing, its wedge surface promotes clutch gear separation, end lever drive cam rotation. Integrated double lock structure realizes AC, DC synchronous locking, and modular design is convenient for automatic assembly, clutch assembly cuts off gear set transmission when emergency unlocking, avoids the risk of jamming, cam dead point design provides self-locking function, and anti-external force impact, worm and worm gear, three-stage gear transmission provides stable big thrust.

This invention discloses a method for producing low-temperature resistant plastic granules for pipes, comprising the following steps: Step 1, cleaning the waste material, and then adding the raw material to a high-speed mixer to obtain a premix; Step 2, adding the premix to a twin-screw extruder and heating it to a molten state for plasticization. This invention relates to the field of plastic granule preparation technology. In this method for producing low-temperature resistant plastic granules for pipes, wastewater is discharged into a circulation tank, driving a turbulence impeller to rotate. While the wastewater is filtered through a grading filter plate, a scraper removes dirt from the surface of the grading filter plate, preventing clogging. Furthermore, the drainage area of ​​the drainage channel can be increased by adjusting the water flow, increasing the water pressure and the impact force on the turbulence impeller, thus increasing the thrust on the scraper and improving the cleaning effect.

The present invention discloses a motor control method for a push-out vehicle refrigerator, wherein the vehicle refrigerator comprises a box body, a cavity arranged in the box body, a drawer arranged in the cavity, a motor arranged in the box body, a motor push-out slider arranged at the output end of the motor and located in the cavity, and a temperature sensor for detecting the temperature in the cavity. A door opening switch is arranged on the surface of the box body. When the temperature in the cavity is lower, the motor adjusts the overall output voltage of the motor with a higher PWM duty cycle, thereby increasing the thrust of the motor, so that the increased sliding friction of the motor push-out slider at low temperature is offset, thereby ensuring the output performance of the motor, and the drawer can be smoothly pushed out of the cavity. Through this scheme, the motor adjusts different PWM duty cycles according to different temperatures, so that the power and speed of the motor push-out slider to drive the drawer to the outside of the cavity are the same at each temperature, the stability is stronger, and more energy is saved.