75results about How to "Small running vibration" patented technology

The invention discloses a vertical grinding mill, wherein a vertical grinding mill body is fixed on a concrete foundation; a grinding table is driven by a rotary power source and horizontally placed at the bottom of the vertical grinding mill; a discharging clearance exists between the grinding table and the inner wall of the vertical grinding mill; a non-grinding region in the center of the grinding table is of an upwards-raised cone; an edge grinding region is of an arc surface which is gradually raised upwards; and a grinding roller extends from the side of the vertical grinding mill to the upside of the grinding region of the grinding table and obliquely fixed downwards. The vertical grinding mill provided by the invention has the advantages of small grinding table diameter, high grinding table rotating sped, high work efficiency, low energy consumption and the like.

The invention discloses a three-dimensionally-woven composite automotive transmission shaft and a manufacturing method of the three-dimensionally-woven composite automotive transmission shaft. A three-dimensionally-woven composite transmission shaft pipe and a universal joint are designed and the sleeve connection and combination manner of the three-dimensionally-woven composite transmission shaft pipe and the universal joint is designed according to the stress characteristic of the transmission process of the automotive transmission shaft. Three-dimensional multi-axial fabric structure combination is conducted through a hybrid fiber multi-direction weaving manner, the structural performance of the specific portion of the transmission shaft is strengthened, and finally integrated weaving of the three-dimensional prefabricated body structure is achieved. After a related three-dimensional fabric prefabricated body workpiece is manufactured, the specific fiber is selected to be subjected to thickness-direction seam laying secondary strengthening treatment so that the strength and rigidity in the thickness direction can be improved; and finally, a thermosetting resin glue solution serves as a base material, resin impregnation recombination and resin curing are conducted on the three-dimensionally-woven prefabricated body fabric by the adoption of continuous forming with vacuum infusion and quick thermocuring combined, and finally a three-dimensionally-woven composite automotive transmission shaft assembly made of the hybrid fiber fabric is formed.

The invention relates to a double-equal pole double-section stator / rotor reluctance generator, comprising two sections of stators and rotors of a salient pole structure or a non-salient-pole structure formed by laminating silicon-steel plates. A stator salient pole is provided with armature concentrated windings or layer windings; the windings are connected in series or in parallel according to the N-N polarity of the armature windings to form a phase, and the windings are connected in series or in parallel according to the S-S polarity of the armature windings to form the other phase; the rotors are equipped with rotating magnetic poles with the same pole number with the stators, and the adjacent pole windings of the rotors are connected in series or in parallel to form a plurality of N and S groups; the rotors can adopt excitation magnetic poles and permanent magnetic poles in different forms and permanent magnetic and electro-magnetic mixed poles, and a rotor excitation device is arranged on a motor shaft; each rotor can be divided into an inner rotor and an outer rotor; and the armature windings can be arranged on the stators or the rotors. In the invention, by adopting an equal-pole-number stator / rotor technology and series / parallel connection dynamic combination of the windings, output voltage can be regulated conveniently, the utilization ratio of the windings is improved, and power density and efficiency of the generator are enhanced.

The invention relates to a novel duplex triangle rotor hydraulic pump which comprises a front rotor oil outlet one-way valve, a front rotor, a front rotor oil inlet one-way valve, a pump shell, a rear rotor oil outlet one-way valve, a rear pump, a rear rotor oil inlet one-way valve and an input shaft, wherein the front rotor oil outlet one-way valve is fixedly connected with the top of the surface of the pump shell; the front rotor oil inlet one-way valve is fixedly connected with the bottom end of the surface of the pump shell; the rear rotor oil outlet one-way valve is fixedly connected with the top of the surface of the pump shell; the rear rotor oil outlet one-way valve and the front rotor oil outlet one-way valve are arranged on the same axis; the rear rotor oil inlet one-way valve and the front rotor oil inlet one-way valve are positioned on the same axis. The duplex triangle rotor hydraulic pump is designed by changing the structure based on a rotor engine; the aim of reducing vibration is achieved in a way of staggering phase angles of similar straight engines; the novel duplex triangle rotor hydraulic pump has the main characteristics of high flow rate, high efficiency, small volume, simple structure and no impact, and is simple to operate.

The invention discloses a high-temperature superconducting magnetic levitation propulsion system, the system comprises a vehicle body and a track, a vehicle-mounted levitation magnet is arranged at the bottom of the vehicle body, the vehicle-mounted levitation magnet is fixedly connected with the vehicle body, the vehicle-mounted levitation magnet comprises high-temperature superconducting strips,and the multiple high-temperature superconducting strips are arranged in a stacked mode; the rail is fixedly arranged on the ground, and a permanent magnet rail is arranged on the rail, corresponds to the vehicle-mounted suspension magnet and is used for achieving suspension and guiding of the vehicle body. The high-temperature superconducting magnetic levitation propulsion system is simple in structure, the structure is ingenious, the suspension magnet is not a traditional high-temperature superconducting block but a high-temperature superconducting strip. The high-temperature superconducting strips are more uniform in trapped magnetic flux, train operation vibration is small, the fixing process of the stacked / woven high-temperature superconducting strips is simple, the high-temperaturesuperconducting strips can be stacked in different directions according to needs, great convenience is brought to design of the superconducting suspension magnet, and the specific requirements for suspension force and guide force are met.

The invention discloses a vacuum rainwater drainage system and a method. The system comprises a pump room, a water colleting tank, a water inlet pipe, a water outlet pipe and a water drainage river channel, wherein one end of the pump room is connected with the water colleting tank through the water inlet pipe, and the other end is connected with the water drainage river channel through a water outlet pipe; an electrical control unit and at least one vacuum control pump group is arranged in the pump room, and the electrical control unit controls the vacuum control pump group; and a liquid level measurement unit is arranged in the water collecting tank, and the liquid level measurement unit outputs signals to the electrical unit. The system and the method have the advantages that the starting of the pump unit requires no filling water, and the working efficiency is high; and the operation vibration of the device is low, and the failure rate is low; connecting pipes can be turned around, underground structures can be avoided, and the problem that construction is hard due to underground pipe networks are complex is solved effectively; capacity of a variable frequency regulation pump can be detected through a double-acting liquid level, and the performance of the system is reliable; and after the system control is upgraded, unmanned management of a pump station can be achieved, and management and human resource costs are saved.

The invention discloses a stereoscopic light-emitting character enclosing machine which belongs to the technical field of stereoscopic light-emitting character processing equipment. The stereoscopic light-emitting character enclosing machine comprises a board clamping device and a cutting device, which are mounted on a machine body, wherein the board clamping device is mounted above a mainboard of the machine body, and the cutting device is mounted below the mainboard of the machine body. The stereoscopic light-emitting character enclosing machine is compact in structure, reliable in performances and low in cost and can be widely applied to production and manufacturing of stereoscopic light-emitting characters.

The invention relates to a large vertical electromotor for a third-generation nuclear power plant sea water circulating pump. The largest domestic vertical asynchronous motor fills the domestic blank. The highest thrust borne by the 7700kW vertical asynchronous motor with 36 poles is 280 tons. A push-guide integral structure is adopted in an upper bearing, and a high pressure oil ejection device is arranged when the motor is started. A self-cooling mode is adopted in a lower guide bearing, and a cooling waterway is removed. An upper machine frame and a lower machine frame are respectively in a structure of extending into a machine base, the axial distance is shortened, and a cooling air path is further optimized. Meanwhile, the structure of a rotor is improved, and the influence of a hot expansion on safe operation of the rotor is effectively avoided. The large vertical electromotor for the third-generation nuclear power plant sea water circulating pump improves the import substitution rate of a third-generation pressurized water reactor nuclear power unit AP1000, and a solid foundation is laid for research and design of a major and special national project CAP1400. The large vertical electromotor for the third-generation nuclear power plant sea water circulating pump is low in rotating speed and high in power, and the thrust is high. The electromotor is particularly applied to the field of third-generation nuclear power plant sea water circulating pumps.

The embodiment of the invention discloses a high-boosting double-cylinder four-piston three-crankshaft full-linear-symmetry two-stroke engine. The high-boosting double-cylinder four-piston three-crankshaft full-linear-symmetry two-stroke engine comprises a first cylinder, a second cylinder, a first high-boosting steam inlet cylinder, a second high-boosting steam inlet cylinder, high-boosting steaminlet pistons and acting pistons. The high-boosting steam inlet pistons are connected with the acting pistons through crank arms. The crank arms are connected to corresponding synchronous belt wheelsthrough crankshafts. The synchronous belt wheels are in transmission through a belt. The two cylinders are provided with exhaust outlets, high-pressure steam inlet one-way valves and igniters. The two high-boosting steam inlet cylinders are provided with high-boosting cylinder one-way valves and carburetor oil-steam hybrid normal-pressure steam pipes. The high-boosting cylinder one-way valves communicate with the first high-pressure steam inlet one-way valves through the oil-steam hybrid normal-pressure steam pipes. According to the engine, the design that the two cylinders are fully linearlysymmetrical is adopted, so that the rotating balance of the engine is optimized, and operating vibration is small; and the four pistons in the two cylinders (two pistons in each cylinder) act at thesame time, so that the heat efficiency is improved by multiple times.

The present invention discloses a universal crusher for producing fish drugs. The universal crusher comprises a base and a crushing disk, wherein the crushing disk is fixed on the base, a material inlet funnel is arranged above the crushing disk, one side of the material inlet funnel is provided with a gas vent, and one side of the crushing disk is provided with a material outlet. According to the universal crusher, crushing is achieved with rotation of the stirring rod in the stirring tank, the structure is simple, the operating performance is good, the fish drug production requirements can be met, and characteristics of energy saving and environmental protection are provided.

The invention provides a heat exchanger which comprises a tubular shell, a shell pass inlet, a shell pass outlet, a limit inlay, a tube pass inlet and a tube pass outlet, wherein both ends of the shell are respectively provided with a tube box and a tube plate, and a heat exchange tube and a baffling plate are arranged in the shell; the shell pass inlet and the shell pass outlet are formed in the tubular shell and axially vertical to the tubular shell; the tube pass inlet and the tube pass outlet are formed in the tube box; and a spiral flow guide ring is respectively arranged at the shell pass inlet and the tube pass inlet. According to the heat exchanger, a total-shell-pass nonlinear three-dimensional multi-runner spiral runner structural design is realized, so that the heat exchanger has the characteristics of high heat exchange efficiency, compact structure, easy machining, low maintenance cost, small vibration, long service life and the like and has wide application values in the fields of petrochemical industry, smelting, electric power, ship building, food, heat supply, energy saving and environmental protection; and particularly, under the condition of two-phase mixed media, the heat exchanger has the characteristics of strong homogenizing capacity and high heat exchange efficiency.

The invention discloses a single-supply heating type screw air source heat pump. The single-supply heating type screw air source heat pump comprises a case, wherein a double-screw type compressor, a first condenser, a second condenser, an expansion valve, a gas-liquid separator, a filter, a liquid storage tank, a heat preservation water tank, a water inlet and a water outlet are arranged in the case; an evaporator is arranged outside the case; the water inlet communicates with the heat preservation water tank through the second condenser and the first condenser in sequence; the lower part of the heat preservation water tank communicates with the water outlet; the double-screw type compressor communicates with the double-screw type compressor to form a circulation loop after sequentially passing through the first condenser and the second condenser, and then communicating with the expansion valve, the evaporator, the gas-liquid separator, the filter and the liquid storage tank in sequence; and a gas outlet of the gas-liquid separator communicates with the double-screw type compressor. The air source heat pump is an all-in-one design and is good in heating effect, high in working efficiency, efficient, energy-saving, small in vibration, low in noise, not prone to icing and frosting, and long in service life.

The invention discloses a condenser steam jet vacuum system which comprises a condenser pipeline connected with a condenser, a steam ejector set formed by at least a steam ejector I and a steam ejector II, and a condenser set formed by at least a condenser I and a condenser II. Power steam inlets of the steam ejector I and the steam ejector II are connected into power steam. Steam is used as media of the steam ejector I, and supersonic jet is produced through a power nozzle, so a head cavity is vaccumized to extract steam-gas mixtures in the condensers, the steam-gas mixtures exported from the condensers are mixed with the power steam and then are ejected into the condenser I through the steam ejector I to be processed in a condensed mode and finally are sucked in by the steam ejector II to be reprocessed. The condenser steam jet vacuum system is simple in structure and low in transformation cost, and can thoroughly solve the problem of unit efficiency reduction brought by vacuum pump cavitation.

The present invention relates to an improved chemical pump. It includes pump body, blade wheel, pump cap, supporting pipe, liquid-discharging pipe, flushing pipe, driving shaft wand bearing component. It is characterized by that its guide bearing seat is mounted on the supporting pipe by adopting bolt, in the guide bearing seat interior a guide bearing is mounted, and in the guide bearing interior a shaft sleeve is cover-mounted, said shaft sleeve is connected with driving shaft by adopting key, in the described guide bearing seat interior a flushing hole is cut, the outward opening end of said flushing hole is connected with flushing pipe, and another end of flushing pipe is connected with liquid-discharging pipe.

The invention relates to an air-conditioned container which is formed by more than one set of air conditioning system installed inside a container body. More than one comprehensive interface box is arranged on one or more faces of the container body; and the comprehensive interface boxes are connected with the air conditioning systems (more than one set) through air pipes. The air conditioning systems are reasonably installed inside the container body to fit the structure of the container and to satisfy the requirements on ventilation, heat dissipation, refreshing the air and supplying air. The air-conditioned container is compact in structure, small in vibration, low in noise, high in safety performance and wide in application range, and is weather-proof and sun-proof and is stable in transportation, installation connection and use.

The invention relates to an oil-lubrication high-temperature air-cooling pile nuclear power plant main cooling fan motor. The motor is a key device in a nuclear power island of a high-temperature air-cooling pile nuclear power plant, and works like a pressurized water reactor nuclear station main pump motor. An upper guidance thrust combined bearing and a lower upper guidance thrust combined bearing of the motor are arranged upper and lower ends of a motor stator. A motor support seat is arranged under the motor. By changing the rule and a design idea that a thrust bearing of a normal vertical motor is arranged under a guidance bearing, so it is the first time to use a rare lubricating sliding bearing structure on a high speed vertical motor. It proves that rare lubricating sliding bearing can be also used in a large vertical high speed motor, so the vertical motor design technology is improved, the new design field of high speed vertical motors is opened up and it is the first time to use a rare lubricating sliding bearing structure on a high speed vertical motor. The motor is suitable for large-power vertical high speed motor, especially for the high-temperature air-cooling pile nuclear power plant main cooling fan motor.

The invention discloses a three-dimensionally-woven composite automotive transmission shaft and a manufacturing method of the three-dimensionally-woven composite automotive transmission shaft. A three-dimensionally-woven composite transmission shaft pipe and a universal joint are designed and the sleeve connection and combination manner of the three-dimensionally-woven composite transmission shaft pipe and the universal joint is designed according to the stress characteristic of the transmission process of the automotive transmission shaft. Three-dimensional multi-axial fabric structure combination is conducted through a hybrid fiber multi-direction weaving manner, the structural performance of the specific portion of the transmission shaft is strengthened, and finally integrated weaving of the three-dimensional prefabricated body structure is achieved. After a related three-dimensional fabric prefabricated body workpiece is manufactured, the specific fiber is selected to be subjected to thickness-direction seam laying secondary strengthening treatment so that the strength and rigidity in the thickness direction can be improved; and finally, a thermosetting resin glue solution serves as a base material, resin impregnation recombination and resin curing are conducted on the three-dimensionally-woven prefabricated body fabric by the adoption of continuous forming with vacuum infusion and quick thermocuring combined, and finally a three-dimensionally-woven composite automotive transmission shaft assembly made of the hybrid fiber fabric is formed.

The invention discloses a shockproof bracket for civil engineering machinery. The shockproof bracket comprises four positioning bolts, the position, close to the edge of the bottom end, of the outer surface of each positioning bolt is provided with a supporting ring in a sleeved mode; the position, located above the corresponding supporting ring, of the outer surface of each positioning bolt is provided with a first supporting spring in a sliding and sleeved mode; and the four positioning bolts are divided into two sets; and a first limiting plate is slidably arranged between the outer surfaces of each set of two positioning bolts in a sleeved mode. According to the shockproof bracket for the civil engineering machinery provided by the invention, through the positioning bolts, the whole device can be stably connected with a designated working place, the situation that the device is affected by vibration in the horizontal direction in the actual using process, and consequently the usingposition of the device deviates is effectively prevented, and through the first supporting springs, the first limiting plate can be effectively and stably supported, and meanwhile, under the stable supporting of the first limiting plate, a cushion block can be effectively driven to move through a second supporting spring and a connecting bolt by pulling a guide bar in a limiting frame.

The invention relates to a novel twin-triangular rotor hydraulic pump. The novel twin-triangular rotor hydraulic pump comprises a front rotor oil outlet check valve, a front rotor, a front rotor oil inlet check valve, a pump housing, a back rotor oil outlet check valve, a back rotor, a back rotor oil inlet check valve and an input shaft, wherein the front rotor oil outlet check valve is fixedly connected with the top end of the surface of the pump housing; the front rotor oil inlet check valve is fixedly connected with the bottom end of the surface of the pump housing; the back rotor oil outlet check valve is fixedly connected with the top end of the surface of the pump housing; the back rotor oil outlet check valve and the front rotor oil outlet check valve are positioned on the same axis; the back rotor oil inlet check valve and the front rotor oil inlet check valve are positioned on the same axis; the back rotor oil inlet check valve is fixedly connected with the bottom end of the surface of the pump housing; the input shaft runs through one side of the pump housing and is rotationally connected with the pump housing; the front rotor is rotationally connected with a front gear of the input shaft; the back rotor rotationally connected with a back gear of the input shaft. The novel twin-triangular rotor hydraulic pump has the main characteristics of high flow, high efficiency, small volume, simple structure, and smooth running without impact.

The invention relates to the technical field of oil exploitation, and discloses a drilling fluid sand pump for oil exploitation. The drilling fluid sand pump comprises a bottom frame, a sealing assembly and an external motor, wherein a movable cavity is fixedly formed in the top of the bottom frame, a low-pressure inlet is formed in the left side of the back of the movable cavity, a high-pressureoutlet is formed in the middle of the right side of the movable cavity, an impeller is movably connected to the middle of an inner cavity of the movable cavity in a sleeved mode, and a fixing frame isfixedly installed on the top surface of the movable cavity. Through the arrangement of a wear-resisting rubber ring and a extrusion block, when the rotating speed of the impeller is increased to enable the pressure inside the movable cavity to be increased, the extrusion block is extruded upwards to increase the contact force between the wear-resisting rubber ring and the extrusion block and between the wear-resisting rubber ring and a main shaft, so that the sealing performance inside the movable cavity is reinforced along with the increase of the rotating speed and the pressure, and the failure probability caused by leakage of a sand pump is reduced; and moreover, a layer of protection is provided for the sealing assembly, invasion of a drilling fluid is reduced, the service life of thesealing assembly is prolonged, and the maintenance cost is reduced.

The invention discloses a rotor assembly and a motor. The rotor assembly comprises a rotor core, a permanent magnet, a rotating shaft, a structural member, a first transmission member and a vibrationdamping member. The rotor core is provided with a magnet groove and a rotating shaft hole. The permanent magnet is arranged in the magnet groove; the rotating shaft is arranged in the rotating shaft hole and a gap is formed between the rotating shaft and the rotor core; the rotor core is arranged in the structural member; the first transmission member is matched with the rotating shaft and locatedon the outer side of the first end of the rotor core, a vibration reduction gap is formed among the first transmission member, the rotor core and the structural member, and the vibration reduction gap comprises a first end vibration reduction gap located between the peripheral surface of the first transmission member and the structural member; the vibration damping member is arranged in the vibration damping gap, the vibration damping member comprises a first end vibration damping member located in the first end vibration damping gap, and the rotor core drives the rotating shaft through the structural member, the vibration damping member and the first transmission member in sequence. According to the rotor assembly, the filling amount of the vibration reduction member can be increased, the vibration reduction performance is improved, the vibration noise is reduced, and the reliability is high.

The invention discloses a vertical grinding mill, wherein a vertical grinding mill body is fixed on a concrete foundation; a grinding table is driven by a rotary power source and horizontally placed at the bottom of the vertical grinding mill; a discharging clearance exists between the grinding table and the inner wall of the vertical grinding mill; a non-grinding region in the center of the grinding table is of an upwards-raised cone; an edge grinding region is of an arc surface which is gradually raised upwards; and a grinding roller extends from the side of the vertical grinding mill to the upside of the grinding region of the grinding table and obliquely fixed downwards. The vertical grinding mill provided by the invention has the advantages of small grinding table diameter, high grinding table rotating sped, high work efficiency, low energy consumption and the like.

The invention discloses a prefabricated track bed structure of a vibration isolation pad on a bridge and a construction method of the prefabricated track bed structure. The track bed structure comprises a prefabricated track plate laid on the bridge, the vibration isolation pad is fixedly arranged below the prefabricated track plate, an adjusting layer is arranged between the vibration isolation pad and the bridge surface, a through pouring hole and a limiting hole are formed in the prefabricated track plate, elastic buffer cushion layers are arranged on the inner walls of the pouring hole andthe limiting hole, the limiting hole is internally provided with a limiting boss, and the limiting boss and the adjusting layer are of an integrally-formed structure. The vibration isolation pad is arranged below the prefabricated track plate, the inner walls of the pouring hole and the limiting hole are provided with the elastic buffer cushion layer, and the limiting boss is arranged in the limiting hole, so that the track force produced during train operation is resisted, it can be ensured that the prefabricated track plate is not in rigid contact with the limiting boss, the vibration generated during train operation is reduced, and compared with a cast-in-place track bed structure, the construction efficiency is high, more construction manpower is saved, and the construction quality isstable and reliable.

The invention relates to a magnetic-force-driven multi-stage pump with double rotors. The magnetic-force-driven multi-stage pump with the double rotors comprises a liquid feeding pump opening cap (10), a front pump cavity barrel (12), a front flow guiding plate rack (13), a front multi-stage blade (14), a liquid outlet worm plate (3), a rear pump cavity barrel (22), a rear flow guiding plate rack (23), a rear multi-stage blade (24), a bearing block end plate (4), an inner magnetic rotor (40), a spacer sleeve (41), an outer magnetic rotor (42), a connecting rack (43), a bearing frame (44) and a pump shaft (5). The magnetic-force-driven multi-stage pump is characterized in that the pump shaft (5) consists of a driving pump shaft (5a) and a driven pump shaft (5b); and a driven outer magnetic rotor (52b) is arranged at the front end of the driving pump shaft (5a) and is matched with a driven inner magnetic rotor (50b) arranged at the rear end of the driven pump shaft (5b), so that the driven pump shaft (5b) is driven to rotate. The magnetic-force-driven multi-stage pump is simple in structure; the processing difficulty is greatly reduced; the running balance of the pump is improved; the service life of the pump is prolonged; and moreover, the magnetic-force-driven multi-stage pump which is assembled in a split manner is convenient to mount, dismount and repair.

The invention discloses a coaxiality-adjustable connecting device. The coaxiality-adjustable connecting device mainly solves the problems that an existing belt connected between a motor of a pumping unit and a speed reducer is laborious to replace and install and prone to causing safety accidents. The coaxiality-adjustable connecting device is characterized in that a shaft coupling sleeve (4) is connected to an input shaft (6) of the speed reducer through a flat key (5); a plurality of steel balls (2) are circumferentially arranged outside the shaft coupling sleeve (4); the steel balls (2) aresupported by a steel ball support (3); a coupling wheel sleeve (1) sleeves the steel balls (2); the coupling wheel sleeve (1) is connected with a sealing sleeve (7) through bolts (8); and the coupling wheel sleeve (1) and the sealing sleeve (7) are embedded inside a motor. The coaxiality-adjustable connecting device is connected with the motor and a speed reducer, a belt transmission mechanism isomitted, the size is small, the structure is simple, the maintenance, disassembly, and assembly are convenient, and the operation is safe and stable.

The invention discloses a tripod sliding type universal joint assembly, which comprises a sliding sleeve and a three-fork bearing assembly arranged in the sliding sleeve. The sliding sleeve is provided internally with an arc-shaped raceway for the sliding of the three-fork bearing assembly. The three-fork bearing assembly includes a bearing frame with an involute spline in the middle, three pin shafts uniformly arranged on the bearing frame, and bearing outer rings, needle rollers, baffle rings and elastic snap rings mounted on respective pin shafts. The outer spherical surfaces of the bearingouter rings are matched with the raceway of the sliding sleeve. A groove is formed on the outer spherical surface of each bearing outer ring or a rough surface is laser-etched on the outer sphericalsurface of each bearing outer ring. The inner surfaces of the bearing outer rings are matched with the needle rollers. The inner surfaces of the bearing outer rings and the needle rollers are respectively in a corresponding spindle shape. The tripod sliding type universal joint assembly of the invention has the characteristics of sufficient lubrication, small friction force, high overall transmission efficiency, small running vibration and large working swing angle.

The invention relates to an FPGA-based linear cutting device control device and method. The FPGA-based linear cutting device control device is provided with an upper computer, a closed loop control card, a motor driver, a motor and a lead screw, wherein the motor drives the lead screw to move, the upper computer communicates with the closed loop control card, and the closed loop control card communicates with the motor driver. The FPGA-based linear cutting device control device is characterized in that a grating ruler for collecting displacement data of the lead screw is further provided. Theclosed loop control card is provided with a closed loop control unit, the front end of the closed loop control unit is provided with a signal decoding unit for identifying and decoding the command ofthe upper computer, and the rear end of the closed loop control unit is provided with a code output unit for adapting to different types of motor drivers. A grating signal decoding unit is further provided, the input end of the grating signal decoding unit is connected to the output end of the grating ruler, and the output end of the grating signal decoding unit is connected with the closed loop control unit. The FPGA-based linear cutting device control device has the advantages of reasonable structure, high precision, high efficiency and stability.

The invention discloses an engine cycle-changeable system for automobile coasting. According to the system, under the condition that normal driving habits are not changed, when an automobile is switched to a gear-shifting coasting state, an engine can be automatically switched from a four-stroke cycle to a two-stroke cycle so that the running resistance generated by the engine which is dragged by a driving wheel to rotate can be obviously reduced, and when the automobile is switched to an accelerating or braking state from the gear-shifting coasting state, the engine can be automatically switched from the two-stroke cycle to the four-stroke cycle.

The invention relates to a d istributed fluid energy-based electric power generation device comprising an electric power generator stator, an electric power generator rotor and blades; the electric power generator rotor comprises an annular rotor body, a central flow guiding body is arranged at a center of an inner circumference of the annular rotor body in a concentric manner, a circumference of the central flow guiding body is uniformly provided with a number of blades, and outer rims of the blades are connected with an inner wall of the annular rotor body; a number of axial direction fluid passage fluid flow channels are formed via respective enclosures of the blades and the central flow guiding body and the inner wall of the annular rotor body. According to a conventional electric power generator structure, fluid kinetic energy can be transmitted to an electric power generator only via arrangement of a transmission mechanism between an impeller and the electric power generator or arrangement of a speedup device; the annular rotor body can be directly driven to rotate via the blades of the electric power generation device disclosed in the invention, intermediate transmission links are eliminated, energy conversion efficiency is greatly improved, the electric power generator rotor is arranged on tail ends of fluid energy receiving blades, relative movement between a permanent magnet and a wire coil is effectively amplified, and mechanical energy consumption caused via arrangement of a speedup mechanism can be reduced by times.