44results about How to "Stable speed" patented technology

This invention provides a cup assembly for a food processor, including a cup body, a cup lid, and a processing component disposed within the cup body. It also includes a gearbox, which comprises a movably disposed clutch output shaft. When the clutch output shaft moves to a first position, it drives the processing component to output a first rotational speed; when the clutch output shaft moves to a second position, it drives the processing component to output a second rotational speed. The cup lid is installed in place, maintaining the clutch output shaft in either the first or second position. Furthermore, a food processor with the aforementioned cup assembly is provided. In the first position, the clutch output shaft outputs a first rotational speed to adapt to multi-functional cooking; in the second position, it outputs a second rotational speed to adapt to another multi-functional cooking method requiring a different speed. By changing the position of the clutch output shaft, the processing component can be replaced and the rotational speed can be automatically switched. Moreover, the output speed range is wide and the torque is high, avoiding stalling caused by high processing resistance.

The utility model provides a modified star-shaped cinder valve. The modified star-shaped cinder valve comprises a shell, an impeller, a driving motor, a baffle assembly and a plugging assembly. The impeller is arranged in an inner cavity of the shell and comprises a rotating shaft and a plurality of blades, the driving motor is in transmission connection with the impeller, the baffle assembly comprises two baffles fixedly connected in a feeding port of the shell, an inlet is formed between the two baffles, and the plugging assembly comprises a sealing plate connected between the outer ends of every two adjacent blades. The two partition plates are connected to the outer side of each sealing plate, a material receiving groove is formed between the two partition plates, and the material receiving grooves sequentially pass through the position below the inlet along with rotation of the impeller; the baffle assembly can reduce entering of materials, the blocking assembly can reduce the conveying amount of the materials, and therefore the requirement for the small conveying amount of the materials is met, and the motor frequency does not need to be reduced.

The present application relates to the technical field of vehicles, and specifically discloses a control method and device for a hydraulic retarder system, a vehicle and a storage medium, wherein the control method for the hydraulic retarder system acquires a control instruction of the hydraulic retarder; when the control instruction is a starting instruction, a synchronizer is combined with an enablement; the rotational speed V11 of a rotor is acquired; the rotational speed V12 of a driving gear is acquired; a first rotational speed difference rate is calculated, the first rotational speed difference rate=(V12-V11) / V12; and the hydraulic retarder is started when the first rotational speed difference rate is not more than a first set value. The rotational speed of the rotor and the rotational speed of the driving gear are both stable when the hydraulic retarder is started, and normal operation can be maintained, thereby avoiding power jerk and improving the user driving experience.

This utility model relates to the field of power machinery technology and discloses a centrifugal mechanical power enhancer, including a support frame with a symmetrical support structure. One end is fixed with a reinforcing part, and the other end is rotatably connected to a second gear disk. The middle section supports a drive device. The drive device, using a motor structure, is located at the lower part of the support frame and is connected to the drive shaft via a chain to provide initial rotational power. The reinforcing part, the core power enhancement unit, includes: a first gear disk, coaxially connected to a connecting shaft, with an inner gear ring meshing with a drive gear, and circumferentially distributed mounting positions for the iron-throwing parts on the outer side; a positioning disk, coaxially arranged with the gear disk and maintaining a distance, rotatably connected to the support frame via bearings, providing a reaction force fulcrum for the iron-throwing parts; and three symmetrically arranged iron-throwing parts, each containing a 24 kg iron-throwing body. This utility model features a compact structure, efficient transmission, and enhanced power through the cooperation of the iron-throwing parts and gear disks. The electrical control cabinet allows for precise adjustment, adapting to different loads and exhibiting strong stability.

The utility model belongs to high temperature friction coefficient test technical field especially for a kind of low-speed high-temperature environment with lubricating material friction coefficient testing device, including casing, bottom plate and base, casing is set in bottom plate upper portion, base is set in bottom plate lower portion;The top surface of bottom plate is respectively provided with horizontal key and vertical key, and force measurement driving assembly is also provided on the bottom surface of bottom plate;Supporting seat is provided on the mounting hole corresponding to horizontal key;The rear end of supporting seat is provided with motor base, and coupling is provided in the middle part of motor base;The end of coupling is connected with servo motor;The front end of supporting seat is provided with bearing, and supporting shaft is provided in the lower part of bearing;The front end of supporting shaft is also provided with test shaft;The front end of test shaft is provided with test assembly.The utility model can realize the standardization measurement of finished lubricating material sliding friction coefficient under low-speed high-temperature environment, solve the problem that traditional method cannot quantize test data.

This invention discloses a fully automatic linear control busbar bonding structure and method. The structure includes: a bonding pressure roller, a take-up roll, and a release roll mounted on a substrate; multiple reversing rollers on the substrate for adjusting the direction of the material roll / strip; a release roll for holding the material roll / strip; one end of the material roll / strip connecting to the take-up roll after passing through the multiple reversing rollers and the bonding pressure roller; the bonding pressure roller for pressing the material roll / strip closer to the electronic board; and a control module connected to a tension adjustment mechanism, a take-up motor, and a release motor, capable of adjusting the speeds of the take-up motor and the release motor. This fully automatic linear control busbar bonding structure utilizes the independent rotation of the take-up roll and the release roll to uniformly wind the material roll / strip onto the take-up roll. During the conveying process, the angle and position of the material roll / strip are adjusted by the multiple reversing rollers, facilitating the bonding pressure roller to bond the material roll / strip to the electronic board, ensuring high efficiency and high quality in busbar installation on the electronic board.

The utility model discloses a control system of an electric cement tank truck, which relates to the technical field of electric engineering trucks and comprises a truck chassis, a motor, a speed reducer, a cement tank, a spline, a diesel engine, a generator, a power battery pack control box, a control system control box and a power takeoff. Traditional diesel engine driving is replaced, tail gas emission is fundamentally eliminated, a pure electric driving mode is achieved through the motor controller, pollution generated by fuel oil combustion is avoided, noise is low when the electric cement tank truck works, noise pollution of a construction site can be reduced, and the comfort of the working environment is improved; and a motor controller, a generator controller and a sensor group are coordinated through a whole vehicle controller, so that multi-module cooperative control is realized, motor output is optimized through a vector control algorithm, the rotating speed of the cement tank is ensured to be stable, and the stirring quality is improved.

The utility model relates to tablet computer quality detection technical field especially is related to a kind of side magnetic force detection device for tablet computer. Aim at the problem such as unstable tension, big data dispersion in existing manual test mode, and rigid connection cannot adapt to product size tolerance and lead to misjudgment and miss detection, the device includes controller, operation platform, control component, fixed component and test component. Controller is located in operation platform, and control component includes control panel with button and pilot lamp;Fixed component is fixed tablet computer by air cylinder drive pressure plate;In test component, motor drives sliding platform to drive push-pull dynamometer to move, and then drive flexible clamping unit and test pen to approach or away from tablet computer, and flexible clamping unit is self-adapting product size deviation. The device realizes test automation, guarantees tension stability and data consistency, can accurately detect tablet computer side magnetic force, reduces misjudgment and miss detection, improves detection efficiency and quality control level.

A turbine type flow sensor is provided with a main water pipe, the upper end and the lower end of the main water pipe are closed, so that a metering cabin is formed in the main water pipe, a turbine is arranged in the middle of the metering cabin, a magnet is arranged in the turbine, and a water inlet pipe transversely communicated with the upper portion of the metering cabin and a water outlet pipe transversely communicated with the lower portion of the metering cabin are arranged on one side of the main water pipe. The other side of the main water pipe is provided with a detection circuit matched with the magnet; a first conical groove located above the turbine and a second conical groove located below the turbine are formed in the metering cabin, and the first conical groove and the second conical groove are coaxially aligned; the upper end of a rotating shaft of the turbine forms a first conical part with the taper smaller than that of the first conical groove, and the lower end of the rotating shaft of the turbine forms a second conical part with the taper smaller than that of the second conical groove. The rotating shaft of the turbine always takes the cone top of the first cone part and the cone top of the second cone part as a supporting point, the rotating friction is greatly reduced in a point contact mode, the rotation starting of the turbine is accelerated, the stable rotating speed is achieved, and the response speed and the detection precision of flow detection are improved.

The application discloses a tension roller group control method and device of a silicon steel cold continuous rolling mill train, and is applied to the silicon steel cold continuous rolling mill train. The method comprises the following steps: according to the rotating speed of the tension roller group, the current given value of each tension roller in the tension roller group is corrected in real time, so as to balance the load of each tension roller; during a preset time period when the coiler performs slitting operation, according to the strip linear velocity at the outlet of the last stand and the rolling speed of the last stand, the rotating speed of the tension roller group is corrected; wherein the last stand is the last stand of the rolling mill train; if the roller body slip phenomenon occurs in the tension roller group, the current given value of the slip roller at the slip moment is locked, and the slip phenomenon disappears until the slip phenomenon disappears. The method cooperates from three dimensions of load balancing, slitting disturbance inhibition and slip control, comprehensively improves the running stability and load balancing of the tension roller group under various working conditions, and effectively avoids the over flow, strip breakage and product quality defects caused by the abnormal running of the tension roller.

This invention provides a method and system for dynamic correction of a hoist under speed loop control, relating to the field of data processing. The method includes: acquiring the hoist car's descent information during cargo entry into the hoist car, and performing dynamic correction of the hoist's descent based on this information; collecting the real-time motor speed of the hoist during cargo transportation, and adjusting the phase current of the hoist motor based on the real-time motor speed and a preset motor speed; and acquiring the hoist car's lifting information during cargo exit from the hoist car, and performing dynamic correction of the hoist's lifting based on this information. This method has the advantage of improving the real-time performance and accuracy of hoist correction.

The invention relates to resistance measurement, in particular to the technical field of generator detection, and discloses a generator stator winding resistance testing device which comprises a base, a three-phase motor, a megohmmeter and a rotating motor are mounted on the base, and a rocker arm output shaft of the megohmmeter is fixedly connected with an output shaft of the rotating motor. The three-phase motor is provided with a winding portion, the winding portion is provided with a switching portion, the switching portion is provided with a lead portion, the base is provided with a support, the support is provided with an adjusting portion, the support is further provided with a control portion, the support is further provided with a case, the megohmmeter is provided with a conversion portion, and the megohmmeter is provided with a control portion. A microprocessor is arranged in the case, mechanical linkage of the switching part and the conversion part and control of the microprocessor are adopted, loop switching of U-V, V-W and W-U interphase tests and U-ground, V-ground and W-ground-to-ground tests is automatically completed, manual wire dismounting and wiring are not needed, automatic switching is achieved, and the test efficiency is improved.

The utility model relates to brass solder flux production equipment technical field discloses a raw material rapid processing device for brass solder flux, including inlet, the inlet lower extreme is equipped with the feeding crushing screening module for carrying out crushing and screening to brass solder flux, the feeding crushing screening module lower extreme is equipped with the discharge module for carrying out uniform mixing to the qualified brass solder flux granule after screening, the discharge module is close to the inlet end and is equipped with the discharge valve for controlling the qualified brass solder flux discharge time after mixing, the outlet below of discharge valve is equipped with the aggregate frame for collecting the qualified brass solder flux after processing, and this device can carry out crushing, screening, mixing integrated processing to brass solder flux raw material, promotes the adaptability of device to different specifications raw materials, controls brass solder flux feed quantity, promotes processing efficiency and raw material quality, guarantees raw material quality.

This invention discloses a motor speed estimation method, apparatus, motor control method, and system based on Koopman operator error compensation. The method includes: calculating two speed test values ​​using backward differential and center differential methods respectively based on the rotor position signal acquired by the motor encoder; calculating the difference between the two speed test values ​​as the speed error value at the previous time step k-1; constructing a prediction input; predicting the speed error based on the Koopman operator K and the prediction input to obtain a predicted error value; calculating the motor speed prediction value based on the predicted error value and the speed test value; and updating the Koopman operator at the next time step. Compared with existing technologies, this invention has strong engineering adaptability, is suitable for high-dynamic motor control systems, and has high detection accuracy.

This application relates to a high-efficiency production equipment for polyetheramine-modified epoxy resin coatings, belonging to the technical field of coating production equipment, which includes a mixing tank. This application achieves bidirectional shear mixing by setting up a rotating rod, spiral stirring blades, a rotating cylinder, a C-shaped rotating frame, and a stirring rod, thereby improving the uniformity of coating mixing. During operation, a forward and reverse motor drives the main bevel gear to rotate, and the main bevel gear simultaneously meshes to drive the first and second driven bevel gears to rotate in opposite directions, thus causing the rotating rod and rotating cylinder to rotate in opposite directions: the rotating rod drives the spiral stirring blades to rotate clockwise, pushing the material upwards; the rotating cylinder drives the C-shaped rotating frame and stirring rod to rotate counterclockwise, creating reverse shear on the material. The convection and shearing effects generated by bidirectional mixing can effectively break the agglomeration of high-viscosity raw materials, solving the problem of uneven mixing in traditional unidirectional mixing, and ensuring that the polyetheramine-modified epoxy resin is fully integrated with other components.

The present application provides a kind of outside environment recognition device, which stably exports the speed of stereoscopic object.The outside environment recognition device (120) has: stereoscopic speed export part (160), which exports the speed of predetermined stereoscopic object based on the distance image exported from the luminance image of two shooting devices (110) and is extracted;Monocular speed export part (162), which exports the speed of stereoscopic object based on the luminance image of one shooting device (110) and is extracted;Predicted speed export part (164), which exports the current speed of stereoscopic object based on the past speed of stereoscopic object and is predicted;Mixing ratio export part (166), which exports the mixing ratio of stereoscopic speed, monocular speed and predicted speed;And object speed export part (168), which exports the object speed representing the speed of stereoscopic object by mixing stereoscopic speed, monocular speed and predicted speed based on mixing ratio.

The application discloses an AMT gear shifting method in an auxiliary braking condition, a storage medium and a device, relates to the fields of brake temperature estimation and auxiliary braking use evaluation, and the method comprises the following steps: when an AMT controller monitors that there is torque of a hydraulic retarder or engine braking, the AMT controller enters an auxiliary braking mode, and it is judged that: if a vehicle auxiliary braking gear has a constant speed function, then the auxiliary braking torque is automatically adjusted according to the change of the vehicle speed to keep the vehicle speed stable; if the auxiliary braking gear is used for auxiliary braking, then an AMT gear shifting interval is determined, and the AMT gear shifting interval is corrected according to braking power; and if an auxiliary braking handle is not opened, then the engine speed is controlled to be in an engine braking normal working speed range, and the engine speed is adjusted in real time according to the hydraulic retarder. According to the application, by selecting a suitable gearbox gear, the braking effect can be ensured, and the use experience of a driver can be prevented from being affected by the excessively high speed and excessively large noise.

The utility model discloses a floating cutter head shaver, including fuselage and the cutter head of being located at the top of fuselage, there is power assembly in the fuselage output rotary driving force, and the cutter head includes shell head, inner blade and knife net, and the inner blade is driven to rotate shaving by power assembly, and can float up and down, the buckle connection of shell head is connected in the knife net frame, and the knife net frame has spherical recess, and the knife net includes spherical base body and net face part, and the spherical base body is suitable for the configuration in the spherical recess, and can universal deflection, and the floating support is installed on the knife net frame, and the floating support has annular base body and a plurality of elastic sheets, and the annular base body is opened long slot hole at the corresponding elastic sheet, and one end of elastic sheet is connected long slot hole hole wall, and the other end is inclined to the upper abutment spherical base body stop ring, and through the deformation of elastic sheet, the displacement of knife net deflection is adapted and resets, and the shell head cover is outside the knife net, and has the cutter lip that exposes net face part, and restricts the knife net to the spherical recess and separates upward. The shaver is through the up and down floating of inner blade, and the knife net universal deflection adapts the facial profile curved surface, and the knife net is more close to the skin when shaving, and the shaven cleanliness is improved.

The application discloses a dynamic slip vector control method for eccentric large-inertia load of an asynchronous motor, and comprises the following steps: an operation vector equation of the asynchronous motor is as follows: a voltage steady-state equation: S1, Usd=Rs*isd-omega1*(Ls*Lr-Lm2) / Lr*isq; S2, Usq=Rs*isq+omega1*(Ls*Lr-Lm2) / Lr*isd+omega1*Lm / Lr*psi r, wherein, Usd and Usq are d-axis and q-axis voltages of a stator, isd and isq are d-axis and q-axis target currents of the stator, Rs and Ls are a stator resistance and inductance, omega1 is a synchronous frequency of the stator, psi r is a total rotor flux, Lr is a rotor inductance, and Lm is mutual inductance; and the application patent of the variable-slip vector control method for the eccentric large-inertia load of the asynchronous motor can effectively solve the problem of the coordination relationship among the gravity eccentric load acceleration / deceleration starting, constant-speed energy saving and constant-speed speed stability through the dynamic slip compensation control.

The present application provides a kind of wind turbine blade pitch angle compensation method, equipment, medium and product, method includes: according to sampling period real-time acquisition generator real-time speed data;According to real-time speed data, calculate real-time speed deviation and real-time speed deviation change rate;According to real-time speed deviation and real-time speed deviation change rate, query optimal compensation variable pitch rate table, find corresponding optimal compensation variable pitch rate;If compensation variable pitch rate is greater than set threshold, then compensation variable pitch rate is converted into compensation pitch angle, trigger wind turbine anti overspeed function, make wind turbine adjust the angle of retraction according to compensation pitch angle.The present application judges whether wind turbine faces the problem of excessive generator speed by current generator real-time speed deviation and real-time speed deviation change rate, gives optimal compensation pitch angle command wind turbine to increase the angle of retraction, which can effectively prevent wind turbine overspeed and keep generator speed stable.

The invention provides an extra-high voltage GIS breakdown point positioning method and system based on voltage wave head identification, and relates to the technical field of GIS breakdown point positioning, and the method comprises the steps: obtaining transient voltage traveling waves generated during GIS breakdown, and constructing double-end original voltage traveling wave time sequence data; traveling wave time sequence data are input into a wave head recognition model, adaptive noise reduction, multi-scale distortion contour recognition and feature fusion are carried out on a traveling wave time sequence through front-end multi-scale feature extraction and cross-layer feature splicing channels of the wave head recognition model, and an accurate fault wave head position index is output from end to end; according to the fault wave head position index, converting the time when the traveling wave actually arrives at the head end and the tail end, and resolving the absolute fault distance of the two ends by using a traveling wave distance measurement mathematical model; and the position of the fault breakdown point is obtained according to the double-end absolute fault distance, and the high-precision GIS breakdown point positioning process is realized. According to the invention, low-cost and high-precision GIS breakdown point positioning can be realized.

This invention discloses a method for controlling the motion of a rotor propulsion air-bearing platform based on a modified cascade fuzzy PID controller, relating to the field of spacecraft ground-based semi-physical testing technology. It improves the PID control scheme to enhance the adjustment accuracy of the rotor propulsion air-bearing platform's motion control. The invention includes: using a propeller-type rotor as the air-bearing platform's motion control actuator; establishing a thrust characteristic mathematical model, wherein the air-bearing platform adopts a three-axis decoupled thruster configuration; constructing an air-bearing platform motion control feedback system; and using the thrust characteristic mathematical model to establish a cascade fuzzy PID control model for the air-bearing platform's motion control feedback system; and adjusting the cascade three-axis PID parameters in real time by using correction coefficients to adjust the correction amount transmitted from the outer loop to the inner loop of the air-bearing platform's motion control feedback system.

The application discloses a pinch roll tension current limiting control method, and relates to the field of steel production, and solves the technical problem that a large deviation is caused between feedback speed and set speed of the existing pinch roll. It comprises the following steps: step one, collecting the roll diameter of the pinch roll; step two, collecting the real-time tension current of the pinch roll; step three, collecting the real-time torque of the pinch roll; step four, limiting control of the real-time tension current of the pinch roll; step five, displaying the limiting control of the real-time tension current of the pinch roll; step six, obtaining the speed difference value in the rolling process of the pinch roll; and step seven, precisely quantifying and superimposing the control of the roll gap of the pinch roll in the rolling process. The application further discloses a pinch roll tension current limiting control system. The application can reduce accident time, improve production output and the finished product rate index.

The utility model relates to a kind of axial flow variable pitch unit driving device and axial flow variable pitch unit, belong to axial flow variable pitch unit technical field, the axial flow variable pitch unit driving device includes reduction mechanism, gear set and shaft coupling, the reduction mechanism is connected through the gear set and the shaft coupling, the shaft coupling is connected with the upper end portion of the rotating shaft;The gear set includes pinion and large gear of different diameters, the pinion and the large gear are engaged arrangement;The pinion is connected with the output shaft of the reduction mechanism, and the large gear is connected with the shaft coupling.The utility model realizes the driving of the rotating shaft of axial flow variable pitch unit, realizes the adjustment of rotating shaft, avoids the interference to the operating oil pipe in rotating shaft;The utility model does not need manual adjustment rotating shaft by artificial, improves work efficiency.

The utility model relates to steel wire mesh skeleton formula outer protective tube test technical field, and disclose a kind of steel wire mesh skeleton formula outer protective tube testing device, including electric sliding table, the top of electric sliding table is provided with two sliding first electric sliding block, the upper side of two first electric sliding block is fixedly installed with chucking chuck, the inside of two chucking chucks is provided with the steel wire mesh skeleton pipe clamped by chucking chuck clamp.The utility model discloses, two groups of independent control chucking chuck fixed pipe body two ends, in combination with electric sliding table drive slider moves towards, realize axial tensile or bending test, rotating ring circumferentially distributed extruder can synchronous exert radial pressure, simulate uniform load;Single extrusion head fixed-point loading is made by telescopic device to push fixed ring transverse movement, detect local compressive resistance;The nesting design of fixed ring and rotating ring, cooperate with sliding table movement, without disassembly, just switch pressure, wear, bending three kinds of test mode, greatly improve detection efficiency and working condition coverage.

The present application relates to a kind of main hoist remaining life prediction method and device, wherein, method includes: S1, the vibration time series data and working condition parameter time series data of the main hoist to be measured are acquired, and the measured vibration signal and measured working condition parameter signal of single operation are segmented, detection data group is constructed and time information is generated;S2, using detection data group to identify working condition, input the first self-encoding model corresponding to working condition, obtain the vibration signal after reconstruction and physical constraint residual, and the model is based on physical constraint dynamics equation to build;S3, total deviation is calculated according to reconstructed signal and physical constraint residual, and deviation sequence is obtained according to time sequence;S4, failure curve is generated based on deviation sequence, and then the remaining life is obtained.The present application can effectively separate working condition influence, fusion physical priori knowledge, realize accurate and reliable life prediction under the condition of variable working condition and variable load.

The utility model belongs to the technical field of powder metallurgy bearing testing, and particularly relates to an automobile motor powder metallurgy bearing vertical friction performance testing device which comprises a bottom plate. A mounting through hole is formed in the center of the bottom plate, and a servo electric cylinder is arranged on one side of the top surface of the bottom plate; a telescopic shaft of the output end of the servo electric cylinder is connected with a push block. The other end of the push block is connected with a tension seat; a test part is arranged on the tension seat, the center of the tension seat is arranged at the mounting through hole of the bottom plate, a driving part is arranged at the lower part of the tension seat, and the driving part is used for cooperating with the test part to test the performance of the to-be-tested bearing together. According to the utility model, the testing component and the driving component are matched for use, so that different loads can be increased for testing according to testing requirements, the testing repeatability and accuracy are greatly improved, the testing is more time-saving and labor-saving, the time cost is reduced, and the product development efficiency is improved.

The utility model discloses a construction waste and nylon fiber composite reinforced water-stable aggregate preparation device, which relates to the technical field of construction material preparation equipment, and comprises a mixing tank, a stirring cavity is arranged in the mixing tank, a stirring piece is arranged in the stirring cavity, a feeding cylinder is rotatably arranged at the top of the mixing tank, and a feeding port is arranged on the top surface of the feeding cylinder. The bottom surface of the mixing tank is provided with a discharging pipe extending into the stirring cavity from an opening in the top surface of the mixing tank, the mixing tank is provided with a driving mechanism for driving the charging barrel and the stirring piece to rotate synchronously, the driving mechanism comprises a double-shaft motor mounted at the upper part of the mixing tank, one driving end of the double-shaft motor extends downwards and is connected with a driving gear, and the other driving end of the double-shaft motor is connected with the stirring piece. And a second gear ring meshed with the driving gear is mounted on the outer wall of the feeding cylinder. According to the utility model, the dispersion uniformity of nylon fibers in construction wastes is improved, the problem of non-uniform dispersion of the nylon fibers in the background technology is effectively relieved, and the mixing effect is remarkably improved.

The device comprises a bottom plate, a fixing frame of a U-shaped structure is fixedly connected to the middle of the upper surface of the bottom plate, a control switch set is fixedly connected to the front surface of the fixing frame, and a variable frequency motor is fixedly connected to the left side of the middle of the upper surface of the fixing frame. An eccentric rotating wheel is fixedly connected to the end of an output shaft of the variable frequency motor, a transmission rod is rotationally connected to an output shaft of the eccentric rotating wheel, a needling plate is hinged to the lower end of the transmission rod, needling holes corresponding to the needling plate are formed in the upper surface of the bottom plate, and supporting rods are fixedly connected to the four corners of the upper surface of the bottom plate correspondingly; according to the device, the cotton feeding and discharging speed can be adjusted, the cotton feeding and discharging speed is kept stable, the situation that needling intervals are not consistent is avoided, meanwhile, the needling frequency is convenient to adjust, and needling non-woven fabrics of different specifications can be produced.