176results about How to "Smooth running" patented technology

The invention relates to a hypocycloidal pin gear speed reducer assembly, a speed reducer and application. The speed reducer comprises an input shaft system, a first output shaft system and a second output shaft system; the number ratio of rotors to stators of the input shaft system is N: (N + 1), the section contours of the rotors and the stators are equidistant lines of a pair of conjugated hypocycloids, the rotors do planetary motion in the stators, the rotors rotate around the centers of the rotors and revolve around the centers of the stators at the same time, and the speed ratio of rotation to revolution is (N + 1): N. An input shaft rotates at the revolution speed of the rotors. Output shafts in the first output shaft system and the second output shaft system are connected through splines on the shafts and rotate according to the difference between the rotation speed and the revolution speed of a rotor, the purpose of speed reduction is achieved, and the speed reduction ratio is N: 1; and the rotor and the stator are made of steel with the hardness of over HRC58. The hypocycloid pin wheel speed reducer has the advantages of being high in transmission efficiency, stable in operation and long in service life, the outer diameter of the hypocycloid pin wheel speed reducer is smaller than the allowable maximum outer diameter of an oil well shaft, the hypocycloid pin wheel speed reducer can be suitable for screw pump oil extraction, and the technical problem that a pin wheel speed reducer cannot be suitable for an oil well all the time is solved.

The invention relates to the technical field of automobile part structures, in particular to a planet row speed reducer lubricating structure for coaxial distributed driving. Comprising a shell, an input shaft, a gear ring, a plurality of planetary gears, a plurality of planetary shafts, a planetary carrier and an oil receiving disc. The gear ring is of an annular structure fixed to the shell. The planetary gears are arranged at intervals in the circumferential direction of the input shaft with the axis of the input shaft as the center, and the planetary gears are meshed with the input shaft and the gear ring; one end of the planetary shaft penetrates through the planetary gear; the planet carrier is sleeved on the input shaft in a manner of rotating around the axis of the input shaft, the planet carrier is fixedly connected with the other end of the planet shaft in the direction of rotating around the axis of the input shaft, and the oil receiving disc is fixed on one axial side of the planet carrier; and the oil liquid sprayed out of the oil liquid channel of the shell is uniformly distributed to the planet carrier, the planet gear, the planet shaft and the first bearing structure in the axial direction. The speed reducer is simple in structure, a special electronic pump does not need to be configured, the energy effect is greatly reduced, and the problem that the NVH effect is poor is solved.

The invention discloses an intelligent scheduling method for finished automobile manufacturing, and belongs to the technical field of automobile manufacturing. The method comprises the steps that after a vehicle queue enters a BDC workshop, vehicle queue information is acquired through an MES system, and the vehicle queue information comprises initial queue information and a target workshop; the MES system performs sorting adjustment on the vehicles according to the initial queue information to generate final queue information; the MES system confirms and controls the number of vehicles dispatched from the BDC workshop every time and a target workshop; the MES system updates the vehicle queue information and sends the vehicle queue information to the BDC control system, the BDC control system performs physical sorting on the vehicles and controls the vehicles to leave the BDC workshop according to the vehicle queue information, and the updated vehicle queue information comprises final queue information, the number of vehicles dispatched each time and a target workshop. According to the invention, through optimization of BDC sorting adjustment, the production efficiency is improved.

The invention relates to the technical field of motors, and discloses a reluctance-assisted permanent magnet synchronous motor and an assembly thereof. The reluctance-assisted permanent magnet synchronous motor comprises a casing, and two groups of end covers are fixedly mounted at the front end and the rear end of the casing. According to the reluctance-assisted permanent magnet synchronous motor and the assembly thereof, in order to enable the motor body to operate more stably and lower noise, the movement mechanism is arranged, a wire on each stator winding can serve as a loop of any two other input wires, each group of stator pieces can form an independent magnetic field, and the three groups of stator pieces alternately generate a magnetic field, so that the motor body is more stable in operation and lower in noise. When the motor body operates, the rotor piece synchronously rotates along with the rotation of the stator piece, a shunt magnetic conduction structure is adopted, so that the cogging torque is eliminated, and the built-in magnetic steel is adopted, so that the effects of low speed, large torque, weak magnetic field and high speed are achieved by fully utilizing the magnetic resistance torque. Therefore, the motor body is more stable in operation and lower in noise.

The invention discloses an intelligent tennis ball picking robot, and particularly relates to the technical field of robots, in the vision aspect, an OpenMV vision module is used, environment information and test information are collected, the running speed of the robot is predicted through a time sequence model, PID control is used for a chassis, the real running speed of the robot is made to be consistent with the predicted running speed, and the running speed of the robot is guaranteed. Specific parameter adjustment is carried out in the aspect of tennis ball picking, so that the tennis ball is smoothly operated in a tennis court scene; an HC-08 Bluetooth module is additionally arranged, wireless communication with other devices can be achieved, a user can have better experience, and the robot can be controlled by himself / herself to grab a tennis ball; and the predicted driving speed is determined, the maximum value and the minimum value of the angle of the steering engine correspond to the corresponding predicted driving speed, then the steering engine is controlled to rotate to grab the tennis ball, and the tennis ball grabbing is more accurate.

The invention relates to the technical field of extraction and utilization of electrolytic aluminum lithium-containing waste, in particular to a method for extracting lithium from electrolytic aluminum waste through ultrasonic strengthening. The method comprises the following steps: (1) coarsely crushing the electrolytic aluminum waste; (2) after the carbon is removed, the electrolytic aluminum waste is subjected to ultrasonic strengthening to strengthen the leaching of lithium, and the lithium is selectively leached by controlling the leaching acidity; (3) performing two-stage impurity removal on the lithium leaching solution; and (4) concentrating and denitrifying the impurity-removed liquid, precipitating lithium, carbonizing and crystallizing to prepare the battery-grade lithium carbonate. According to the method, carbon in the electrolytic aluminum waste is removed through a calcination or combustion method, leaching of lithium is strengthened through an ultrasonic strengthening method, meanwhile, the leaching condition is controlled to enable lithium in the waste aluminum slag to be dissolved out into a leaching solution, and aluminum, iron, sodium and most fluorine in the waste aluminum slag are not dissolved out and left in the leaching slag. And performing simple impurity removal, concentration and denitration on the leachate to prepare the battery-grade lithium carbonate. The method is simple in process and high in lithium extraction rate, and cryolite is mainly contained in leaching residues and can be utilized subsequently.

The invention belongs to the technical field of fluid magnetization, and particularly relates to a fluid magnetization treatment method and system.The fluid magnetization treatment system comprises a controller and a processor, the processor comprises a shell, two connectors are installed on one side of the shell, an adapter is installed on the other side of the shell, a coil bin is formed in the inner wall of the shell, and a coil is arranged in the coil bin; the coil is electrically connected with a controller through an adapter, a U-shaped oil way pipe is installed in the shell, and fuel flows in the oil way pipe. Fuel oil is magnetized through an alternating magnetic field, fuel oil molecules are attracted to vibrate along with alternating of the magnetic field, the internal energy of the fuel oil molecules is improved, the fuel oil molecules are in a quasi-excitation state, and therefore the combustion efficiency and the combustion degree of the fuel oil are improved, meanwhile, the distance between the fuel oil molecules in high-frequency vibration is increased, atomization is more sufficient during atomization, combustion is facilitated, and the fuel oil is more environmentally friendly. And the combustion efficiency of the fuel is further improved.

The invention relates to a pole-mounted vacuum circuit breaker self-adaptive noise reduction device, and relates to the technical field of pole-mounted vacuum circuit breaker noise removal, the pole-mounted vacuum circuit breaker self-adaptive noise reduction device comprises a rack, a first pedestal and a second pedestal are slidably mounted on the rack, a bearing plate is slidably matched with the side part of the rack, a cylinder is hinged to the bearing plate, and a right angle plate is arranged above the cylinder; a transmission shaft in the right-angle plate is in transmission connection with the output end of the induction motor, the outer wall of the transmission shaft is fixedly sleeved with a rotating plate and a first rotating disc, the first rotating disc is internally sleeved with a first belt strip, the outer wall of a rotating rod on the first pedestal and the second pedestal is fixedly sleeved with a second rotating disc, and the outer portion of an extension rod connected with the rotating rod is fixedly sleeved with a rubber ring; iron rings are fixedly installed on the side end faces of the rubber rings, and a plurality of wire rings are arranged on the peripheries of the iron rings in a sleeving mode. According to the invention, over-limit current generated by poor contact between the isolation knife and the isolation knife holder can be eliminated, high-frequency noise generated by abnormal current can be further eliminated, and the pole-mounted vacuum circuit breaker can be ensured to operate stably and normally.

The utility model provides a screw rod roller bracket for processing a marine cylinder sleeve, which is suitable for the technical field of marine cylinder sleeve processing, and provides a screw rod roller bracket for processing a marine cylinder sleeve and a using method thereof, and adopts the scheme that the screw rod roller bracket comprises a rack, a first bidirectional screw rod, a roller seat, an end cover, a strip-shaped groove and a connecting hole, a first bidirectional screw rod is rotatably mounted on the inner wall of the rectangular groove of the rack, roller seats are symmetrically mounted in the rectangular groove of the rack in a sliding manner, the threaded surface of the first bidirectional screw rod is in meshed connection with the inner walls of circular grooves of the roller seats, and different types of cylinder sleeves can be conveniently fixed by mounting the rack, the first bidirectional screw rod, the roller seats, end covers, strip-shaped grooves and connecting holes; according to needs, the roller seat is locked to prevent a worker from locking the roller seat, and the roller body is clamped to prevent the cylinder sleeve from sliding in the circumferential direction; the device is further suitable for the field of machining of marine cylinder sleeves.

The utility model discloses a kind of steel wire rope automatic rope winding machines, by setting torsion releasing device, release the torsion generated in the process of winding rope of steel wire rope, prevent the disorder of rope reel caused by torsion of steel wire rope, tension adjusting device, the tension of steel wire rope in the process of winding operation can be adjusted in real time, so that winding is more regular, by increasing the friction of steel wire rope to slow down its speed, reach the purpose of adjusting tension;And rope reel butt joint device realizes automatic lifting transfer of the winding reel and the storage of steel wire rope by lifting mechanism and transmission mechanism, the degree of automation of the in-place, butt joint and rotating action of steel wire rope reel is high, winding is more efficient;While the rope guiding roller, line pressing mechanism and line arranging mechanism arranged between rope reel butt joint device and tension adjusting device, so that the line arranging and winding action cooperation is more smooth, and line arranging mechanism uses positive and negative screw rod to carry out automatic reversing, can realize the orderly storage of steel wire rope, improve the operation efficiency of steel wire rope storage.

The utility model discloses a high-speed powder mixer, which relates to the technical field of mixers, and comprises a rack, a support plate is arranged outside the rack, support pieces are arranged at the top of the support plate, a turnover shaft is rotatably arranged between the two support pieces, a mixing tank body is arranged on the turnover shaft, and the mixing tank body is provided with a plurality of stirring blades. A high-speed motor and a wall scraping motor are arranged outside the mixing tank body, the high-speed motor is connected with a shear knife, cavities are formed in the two ends of the overturning shaft, a cable is arranged in the cavity in one end of the overturning shaft, a communicating pipe is arranged in the cavity in the other end of the overturning shaft, and the communicating pipe is connected with a water pipe and an oil pipe on the tank body. The supporting structures at the two ends greatly increase the structural strength of the overturning shaft, the stress condition of the overturning shaft is greatly improved, the bearing capacity of the overturning shaft is increased, the abrasion and fatigue conditions of the bearings are improved, the service life of the bearings is prolonged, and the supporting structures at the two ends guarantee the stability of the whole equipment during high-speed operation.

The invention belongs to the technical field of metal wire feeding and printing, and relates to a quick-release wire feeding structure suitable for small-diameter metal wires. The wire feeding structure comprises a main body structure frame assembly serving as an installation reference and a force bearing main body of the whole mechanism; the quick-release wire feeding seat assembly is arranged in the main body structure frame assembly, and a through wire feeding channel is formed in the quick-release wire feeding seat assembly; the wire feeding shaft driving assembly is installed in the shaft hole of the main body structure frame assembly and used for driving the metal wire to move along the wire feeding channel; the wire feeding head assembly is installed at the outlet end of the main body structure frame assembly and used for guiding the metal wires; and the quick-release wire feeding seat assembly can be integrally taken out of and loaded into the main body structure frame assembly. The problems that operation and maintenance convenience is poor, and wire feeding stability and reliability are insufficient are solved.

The utility model belongs to the technical field of rotary trash removers, and particularly relates to a novel lower guide wheel set of a rotary trash remover, which comprises two oppositely arranged guide wheels, the center of each guide wheel is connected with an end shaft through a bearing, and the two end shafts are connected with an intermediate shaft through couplings. The end, located outside the guide wheel, of the end shaft is sleeved with an adjusting ring, and the outer side of the adjusting ring is fixed through a nut. According to the novel guide wheel set, marine creatures cannot be attached, frictional resistance is reduced, and under the condition that normal operation of equipment is guaranteed, transmission is reliable, operation is stable, safety is high, and maintenance is convenient.

The invention relates to a flood-proof drainage system driven by a mining explosion-proof motor and a leakproofness detection method thereof. When running in a dry environment, the main drainage pump runs in a dry mode, and the functions of the main drainage pump are the same as those of a mine main drainage system; when the mining anti-explosion dry-type motor is submerged, the waterproof sleeve is subjected to first-layer sealing, the oil chamber is subjected to second-layer sealing, an outer-static and inner-dynamic multi-sealing structure is formed, and reliable operation of a unit in a diving state is guaranteed. Besides, both the interior of the waterproof sleeve and the interior of the oil chamber have a pressure monitoring function and a pressure adjusting function, the internal pressure of the waterproof sleeve and the internal pressure of the oil chamber are monitored in real time, liquid supplementing or air supplementing pressurization is carried out, dynamic air supplementing and air-liquid pressure self-balance of a motor cavity are achieved, the pressure difference between the two sides of a static seal or a dynamic seal is eliminated, the sealing service life is prolonged, and the sealing performance is improved. Reliable operation of the motor in a deep diving state is ensured, and normal starting of the unit during disaster relief, drainage and mine recovery is ensured. The leakproofness detection method of the flood-proof drainage system is simple and safe to operate.

The invention relates to the technical field of beam prefabricated part preparation, and discloses a beam prefabricated part preparation device for guiding steel fibers through multi-fiber cooperation and magnetic force. Comprising a feeding module, a mixing and conveying module, a non-metal fiber laying module, a steel fiber laying module, a conductive material laying module and a steel fiber guiding and maintaining module which are controlled by a central control module to work. And the uniformity of the concrete is improved by mainly utilizing the movement of the fiber adhesion rod module along a spiral curve in the concrete. In addition, after the rubber expansion pipe expands, the design that the fiber adhesion rod module is separated from the non-metal fibers is adopted in the non-metal fiber adhesion and fiber rod movement system, so that smooth operation of the non-metal fibers, the adhesion liquid and the advancing process is ensured. According to the equipment, fiber arrangement guiding, accurate control over the attachment process and conductive characteristic endowing are achieved, and the working efficiency and the product quality are further improved.

This utility model provides an external rotor housing motor for preventing shaft loosening, relating to the field of external rotor housings. It includes: an end cover one, a mounting base mounted on the top of the end cover one, an end cover two mounted on the top of the mounting base, a shaft body mounted on the inner wall of the mounting base, and a powder metallurgy insert fitted onto the surface of the shaft body, the surface of which is embedded in the inner wall of the end cover two. This utility model, by mounting the shaft body on the inner wall of the end cover two with the powder metallurgy insert, effectively prevents the shaft body from loosening. Furthermore, the protrusions mounted on the inner wall of the iron core match the grooves on the surface of the mounting base, ensuring that the protrusions are installed on the inner wall of the grooves when the iron core is mounted on the surface of the mounting base. During use, the device effectively resists radial forces, thereby preventing the iron core from shifting on the surface of the mounting base.

This application discloses an electric drive system and a vehicle, relating to the technical field of vehicles. The electric drive system includes: a motor, comprising a stator, an inner rotor, and an outer rotor; an outer rotor output shaft, comprising a first shaft segment and a second shaft segment, the first shaft segment being fixedly connected to the outer rotor; an inner rotor output shaft, fixedly connected to the inner rotor; a primary reduction mechanism, comprising a primary first drive gear and a primary second drive gear, the primary first drive gear being loosely fitted onto the inner rotor output shaft, and the primary second drive gear being fixedly connected to the second shaft segment; a first switching device, installed on the inner rotor output shaft and the primary first drive gear; under the action of the first switching device, the inner rotor output shaft and the primary first drive gear are dynamically coupled or decoupled; a second switching device, installed on the first shaft segment and the second shaft segment, under the action of the second switching device, the first shaft segment and the second shaft segment are dynamically coupled or decoupled.

The present invention discloses an independently arranged auxiliary speed change transmission system, which is arranged separately in a housing connected to an engine, and includes a power input shaft, a power output shaft, a driven gear shaft matching the power input shaft and the power output shaft, and a primary gear pair connecting the power input shaft and the driven gear shaft, and a secondary gear pair connecting the driven gear shaft and the power output shaft, wherein the primary gear pair and the secondary gear pair are connected by a wet clutch or a synchronizer or a meshing sleeve, and the shifting function is realized in three different shifting modes. The present invention can be arranged independently, and can realize different functions and adapt to different operation requirements by flexibly changing a variety of structural modes, and has a wide range of applications and meets market demand. At the same time, the bearing load condition is relatively clear, and the reliability of the bearing after selection is relatively high. The lubrication system matched with it can also be independently designed on the basis of an independent structural arrangement, and is less affected by the main speed change transmission and the auxiliary speed change transmission, and the use performance is more reliable.

The utility model discloses a novel universal shaft assembly, including bottom plate, be provided with fixed subassembly on the bottom plate, the fixed subassembly includes mounting seat, fixed base, bolt, first axle body and second axle body, the mounting seat fixed mounting is at the both ends of bottom plate's top, the fixed base can be detached and installed on the mounting seat, the bolt can be detached and installed between fixed base and mounting seat, first axle body and second axle body are placed on the mounting seat respectively, be provided with disassembly subassembly on the fixed base, the disassembly subassembly includes oil injection pipe, connecting pipe and resist the pole, oil injection pipe fixed mounting is on the fixed base, connecting pipe fixed mounting is on the oil injection pipe, resist the pole sliding connection on the connecting pipe, to solve the background art mentioned in the installation fixed time of current universal shaft, although the traditional method can ensure the firmness of universal shaft, when universal shaft needs to maintain or replace, the more complicated technical problem.

The application discloses a stator oiling device and a use method, relates to the technical field of motor accessories, and comprises a driving assembly, a conveying chain, a rack and an oil plate assembly. The conveying chain is arranged around the rack. The driving assembly drives the conveying chain to rotate around the rack. A plurality of oiling brush assemblies are arranged at intervals on the conveying chain. The oil plate assembly is installed on the rack and is arranged in parallel with the oiling brush assemblies. The outer periphery of the oiling brush assembly is used for sleeving the stator. When working, the oiling brush assembly is rolled with the oil plate assembly under the driving of the conveying chain. When working, the oiling brush assembly is first rolled on the oil plate assembly so as to be fully coated with oil. Then, the stator is sleeved on the oiling brush assembly. The oiling brush assembly is again rolled on the oil plate assembly under the driving of the conveying belt, so that the outer periphery of the stator is fully coated with oil. Since the inner wall of the stator directly contacts the oiling brush assembly, the inner wall of the stator is also fully coated with oil. Therefore, the oiling work of the inner and outer walls of the stator is completed, and manual oiling is omitted.

The utility model discloses a kind of underflow slurry pumps, it includes: motor, the motor is arranged on motor support, one end of the motor support is provided with bearing support, intermediate connecting pipe is provided on the bearing support;Slurry pump body, the slurry pump body is connected with the intermediate connecting pipe, impeller is provided in the slurry pump body, the rear cover plate of the impeller is provided with a plurality of back vanes;Shaft, the shaft is built in the intermediate connecting pipe, one end of the shaft is connected on the output shaft of the motor, the other end of the shaft is connected the impeller, sliding bearing is provided on the shaft, intermediate support is provided on the sliding bearing, the intermediate support is connected with the intermediate connecting pipe.The utility model compared with prior art by increasing sliding bearing on the shaft, increase fulcrum, reduce the flexible deformation amount in the process of shafting operation, ensure the stability of impeller operation, reduce the risk of broken shaft, good safety.

A mandrel comprises a mandrel body and a limiting block arranged on the mandrel body, the peripheral wall of the mandrel body is sleeved with a pressing piece and an expansion assembly used for being inserted into an inner hole of a worm gear, the expansion assembly is located between the limiting block and the pressing piece, the pressing piece is movably matched with the mandrel body in the axial direction, and the limiting block is arranged on the mandrel body. And the expansion assembly is extruded to expand in the radial direction when the pressing piece moves in the direction close to the limiting block, and the expansion assembly shrinks in the radial direction when the pressing piece moves in the direction away from the limiting block. During use, the worm gear is arranged on the peripheral wall of the expansion assembly in a sleeving mode, the pressing piece moves towards the limiting block, the diameter of the expansion assembly is gradually increased under extrusion of the pressing piece and the limiting block, the expansion assembly expands an inner hole of the worm gear, a gap between the expansion assembly and the inner hole is counteracted, and radial run-out of the worm gear is effectively reduced.

This utility model provides a wheat irrigation device, belonging to the field of agricultural irrigation technology. The device is characterized by comprising an irrigation main pipe and a water distribution component. The irrigation main pipe is a hollow water pipe with an inlet connected to the bottom of its side wall and the top connected to the water distribution component. The water distribution component is used to rotate and distribute the water in the irrigation main pipe. The water distribution component includes a water distribution connecting rod and a water distribution turntable. The turntable is a cylindrical structure with a hollow interior, and has outlets on its side wall and bottom. The water distribution connecting rod is located at the center of its bottom. The connecting rod is also cylindrical and its bottom is nested within the inner wall of the top of the irrigation main pipe, rotatably connected to it. The connecting rod has a water distribution structure inside, used to divide the water flow into multiple streams. This utility model requires no additional energy and can irrigate wheat through rotation, facilitating agricultural operations.

The invention relates to a motor control method and circuit, and the method comprises the steps: detecting the current of a motor in real time based on a sine wave current envelope area method, and obtaining a current scalar; and calculating a current difference value between the current scalar value and a preset current scalar threshold value, outputting a motor control signal according to the current difference value, the current scalar value and a previous current scalar value, and driving the motor to operate according to the motor control signal. According to the method, the current of the motor is detected in real time based on a sine wave current envelope area method, the problems of measurement errors and control response lag caused by current waveform distortion can be solved, and therefore accurate current value detection and higher response speed can be obtained; besides, in the motor control process, a motor control signal is obtained according to the current difference value, the current current scalar value and the previous current scalar value, and the motor can be controlled to operate stably and smoothly.

The utility model relates to the technical field of compressor assembly, in particular to a rotary vane compressor pre-assembling rear bearing tool which comprises a bottom plate, a pre-assembling measuring table and a positioning block, and the pre-assembling measuring table and the positioning block are assembled on the bottom plate. The pre-assembly testing table is vertically arranged on the bottom plate and comprises a base body, a first shaft body and a second shaft body which are connected with one another in the axial direction, the base body is provided with an assembly surface for bearing a cylinder body, the shaft diameter of the first shaft body is matched with the short shaft distance of a cylinder body assembly hole, and the rear bearing is assembled on the other end face, deviating from the assembly surface, of the cylinder body; the shaft diameter of the second shaft body is matched with the hole diameter of an assembly hole of the rear bearing; the outer axial surface of the base body is concave inwards to form a positioning groove, the positioning block is movably arranged in the horizontal direction, and one end of the positioning block is clamped in the positioning groove; the horizontal position of the positioning block is adjusted through the matching relation between the positioning block and the positioning groove in the pre-assembling testing table, the pre-assembling testing table and the cylinder body on the pre-assembling testing table are driven to deflect by a small angle, the coaxiality fine adjustment effect between the cylinder body and the rear bearing is rapidly achieved, the adjusting time is shortened, and the assembling efficiency is improved.

The invention belongs to the technical field of spinning, and relates to a drafting device for improving the dry uniformity of vortex spinning lines. The vortex spinning front drafting area comprises a front roller, a front pressing roller, a middle roller, a middle pressing roller, an upper pin, two symmetrical upper rubber rings, a lower pin, two symmetrical lower rubber rings, a small pressing roller, a transmission assembly and a lifting mechanism. The small compression roller is parallel to the middle compression roller, penetrates through the two upper rubber rings at the same time and makes contact with the upper surfaces of the working edges of the two upper rubber rings, the distance between the contact point and the jaw of the front roller is D1, the length of the spun fiber raw material is L, and the absolute value of the difference value between D1 and L does not exceed 3 mm; the transmission assembly is used for driving the small compression roller to operate along with the middle roller in the same direction and at the same speed so as to apply acting force F1 parallel to the operation advancing direction of the working edges of the upper rubber rings to the two upper rubber rings; and the lifting mechanism is used for adjusting the height of the small compression roller so as to apply a vertically downward acting force FN to the two upper rubber rings. The drafting device is simple in structure, and the air vortex spinning line evenness can be effectively improved.

The invention discloses a motor rotor structure and a motor, and relates to the technical field of motors, the motor rotor structure comprises a rotor support frame and a magnetic part; the cross section of the rotor supporting frame is circular, the rotor supporting frame is long in the axis extending direction, a shaft hole is formed in the axis of the rotor supporting frame in a penetrating mode, and a driving shaft is inserted into the shaft hole and is in driving connection with the rotor supporting frame; the magnetic part is installed and fixed along the peripheral side of the rotor support frame so as to form a magnetic induction area; and the rotor support frame is made of a non-metal material. According to the technical scheme of the invention, the magnetic part is installed and fixed along the peripheral side of the rotor support frame to form the magnetic induction area, and the rotor support frame is made of a non-metal material, so that components of the rotor structure of the motor are prevented from being magnetic metal components, the lightweight design is realized, and the cost is reduced. Therefore, the starting speed of the motor is increased, and the operation is stable. The working efficiency of the motor is improved, and the manufacturing cost is reduced.

The utility model provides a static contact assembly and an on-load tap-changer. The static contact assembly comprises a static contact and a support, the static contact comprises a static contact point, a bearing part used for bearing the static contact point and a wiring part used for leading in current, the support is provided with a fixing hole used for fixing the static contact point and the bearing part, the fixing hole penetrates through the two opposite faces of the support, and the bearing part is used for bearing the bearing part. The fixed contact and the bearing part are arranged in the fixing hole, the area of the side, connected with the bearing part, of the fixed contact is larger than that of the side, connected with the fixed contact, of the bearing part, and the size of the fixing hole is matched with the size of the fixed contact and the size of the bearing part. The working surface of the static contact is increased, the static contact can be reliably contacted with the cylindrical rolling contact, the static contact is stable in installation and operation, the service life of the on-load tap-changer can be prolonged, and the maintenance workload is reduced; the support is made into an upper and lower split structure, and is more suitable for on-load tap-changers of different specifications.

The utility model relates to the technical field of blast furnace ironmaking production, and discloses a pig casting machine head beating device and an ironmaking system. The driving shaft is rotationally connected to the support, and a plurality of shifting blocks are arranged on the circumferential surface of the driving shaft at intervals; the driving source is arranged on the support, and the output end of the driving source is coaxially connected with the driving shaft; the supporting shaft is connected to the support and is parallel to the driving shaft, and the supporting shaft is located below the driving shaft; the middle positions of the multiple pendulum bobs are rotationally connected to the supporting shaft, the multiple pendulum bobs correspond to the shifting blocks respectively, and when the driving source drives the driving shaft to rotate, the shifting blocks shift the pendulum bobs corresponding to the shifting blocks to periodically swing around the supporting shaft. The device is simple in structure and convenient to use, can meet the production requirements of the pig casting machine, reduces the amount of raw iron, and pokes the pendulum bob to move through the poking block on the driving shaft, so that a steel mold, rotating to the position of a machine head, of the pig casting machine is knocked, and an iron block on the steel mold falls into an iron bin of the machine head.