79 results about "Damping torque" patented technology

The invention relates to the technical field of robot control, and discloses a robot multi-mechanical-arm cooperative anti-collision control method and system.The method comprises the steps that a three-dimensional Cartesian global reference coordinate system with a kinematics pivot point as an original point is established, inner and outer side operation domains are divided, and outer side virtual nodes are defined; a virtual safety monitoring section is constructed in an outer side driving domain, a dynamic rejection light spot is generated, and collision early warning is generated through position and trend composite judgment; mapping the virtual repulsive force into equivalent joint damping torque, and superposing the equivalent joint damping torque to a current control ring of the servo driver; by means of kinematics reverse deduction and virtual force field construction, mathematical reconstruction of the outside non-sensing blind area state is achieved on the premise that an external sensor is not needed, and external connecting rod hidden physical collision caused by'cohesion and divergence 'motion coupling of multiple mechanical arms is effectively prevented through force sense feedback of a current control ring level.

The invention provides a network construction type electromagnetic scale stabilization control method and system based on a phase compensator, and relates to the technical field of phase compensators, and the method comprises the steps: obtaining the virtual damping torque of each link of a network construction converter grid-connected system; identifying a system electromagnetic oscillation leading link based on the virtual damping torque of each link; constructing a second-order lead phase compensator, and designing a controller structure of the second-order lead phase compensator; calculating a phase lag angle and a margin of the electromagnetic oscillation dominant link, and calculating a phase compensation angle of a second-order lead phase compensator according to the phase lag angle and the margin; parameters of a second-order lead phase compensator are set according to the phase compensation angle, and net-building type electromagnetic scale stabilization control is carried out based on the second-order lead phase compensator after parameter setting and an electromagnetic oscillation leading link; the electromagnetic oscillation problem in traditional control is solved, and the electromagnetic oscillation stability of the system is improved.

The invention discloses a magnetic pole rotating type electromagnetic damping shimmy damper for a nose landing gear of an aircraft, and belongs to the technical field of vibration control of landing gears of aircrafts. The shimmy damper comprises a first stator disc and a second stator disc which are symmetrically arranged, a rotor disc, a plurality of pairs of permanent magnetic poles, a rotating shaft, a top cover, a base and a bearing. The rotor disc is in interference fit with the rotating shaft through the central square hole, the magnetic poles are circumferentially, uniformly and fixedly arranged on two sides of the rotor disc, and the magnetizing directions of the adjacent magnetic poles are opposite. An adjustable air gap is reserved between the stator disc and the magnetic pole. During working, shimmy motion of the nose landing gear is converted into rotation of the rotating shaft through the transmission mechanism, the rotor disc and the magnetic poles are driven to rotate, the stator disc cuts magnetic induction lines to generate eddy currents, damping torque is formed, kinetic energy is converted into heat energy, and efficient shimmy reduction is achieved. External power supply is not needed, the structure is compact, the weight is light, the problems of abrasion and maintenance of a traditional friction or oil damper are solved, and the damper is particularly suitable for a modern aircraft landing gear system.

The invention relates to the technical field of ship mounting equipment, and discloses a modular mechanical mounting structure for a ship deck, which comprises a wharf, and a slot is formed in one side, close to a ship body, of the top of the wharf; the ship body fixing base is connected with the lower portion of a ship side boarding opening, a springboard for personnel and micro-cargo to move up and down is arranged on the ship body fixing base, and the end, away from the ship body fixing base, of the springboard extends to the position above a wharf. The positions, close to the wharf, of the two sides of the ship body fixing base are fixedly connected with hinge connecting bases used for being connected with the hinged traction device. By adding and arranging the board body swinging stabilizing mechanism, when the ship docking personnel springboard is used, the mechanism can rapidly absorb and dissipate swinging energy through reverse damping torque generated by high-viscosity damping liquid on a universal inertia swinging ball according to the phenomena of high-frequency small-amplitude swinging, flutter and structural resonance of the springboard caused by sea waves, and the swinging energy is dissipated through the reverse damping torque generated by the high-viscosity damping liquid on the universal inertia swinging ball; swaggling superposition amplification is effectively restrained, and violent shaking of the springboard is avoided.

A motor control device is used in a battery electric vehicle provided with a motor that outputs power to a drive shaft connected to an axle via a gear mechanism, and controls the motor so as to output, to the drive shaft, a torque that is the sum of a required torque and an execution damping torque obtained by multiplying a required damping torque required for damping vibration by a gain, when the absolute value of the required torque is a first value greater than or equal to 0 and less than 0, the gain is set to a predetermined value greater than 0 and less than 1.

The utility model relates to an adjustable damping structure which comprises an output shaft, a driving motor, a damping piece and an adjusting assembly. The driving motor is connected with the output shaft and is used for driving the output shaft to rotate; the damping piece is installed on the output shaft and used for generating friction with the output shaft when the output shaft rotates. The adjusting assembly comprises a spring, a rotation stopping gasket and a locking nut which are sequentially installed on the output shaft, the damping piece is arranged on the side, away from the rotation stopping gasket, of the spring, and rotation stopping tooth-shaped parts which can be meshed with each other are arranged on the surface of the rotation stopping gasket and the surface of the locking nut. Wherein the output shaft is provided with a thread matched with the locking nut. The damping torque can be adjusted in real time, operation is easy and convenient, the anti-loosening function is achieved, it can be ensured that the damping torque is output stably, and use reliability is effectively improved.

The application discloses a single-shaft active and passive mixed driving intelligent artificial knee joint structure with energy recovery function, which comprises a joint rotating module, a gear transmission module, a hydraulic damping module, a rack and a motor. The gear transmission module comprises a primary bevel gear transmission system, a secondary gear transmission system, a synchronous belt wheel transmission assembly and a transmission rack. The motor is fixed on the transmission rack. In the active stage, the motor provides an active driving torque for the knee joint through the gear transmission module and the joint rotating module. In the passive stage, the joint rotating module transmits a passive torque of the knee joint to the motor through the gear transmission module, drives the motor to rotate, so that the motor generates electricity to recover energy, and the hydraulic damping module provides a damping torque to ensure the stability of the knee joint. In various use occasions, the required damping or driving torque can be obtained, the power consumption of the motor can be reduced by recovering the passive torque of the knee joint in the passive stage, and the working endurance of the intelligent artificial limb is improved.

This invention relates to the field of wind turbine technology, specifically to a wind turbine main shaft structure. The wind turbine main shaft structure includes a hub, a transmission frame, a main shaft, a nacelle base, a main bearing, and a rear bearing. The hub and transmission frame are respectively connected to both ends of the main shaft. The nacelle base has a main bearing seat and a rear bearing seat at both ends along the axial direction of the main shaft, with the main bearing connected to the main bearing seat and the rear bearing connected to the rear bearing seat. The main shaft is rotatably connected to the nacelle base via the main bearing, and the transmission frame is rotatably connected to the nacelle base via the rear bearing. The transmission frame is used for transmission connection with the generator. This wind turbine main shaft structure reduces the weight and load of the unit components, and the segmented design of the main shaft reduces the difficulty of main shaft machining. The structural installation design of the front and rear bearings improves the rigidity of the entire transmission chain and eliminates the requirement for vibration-damping torque arms in independent shaft transmission chains.

The application provides a torque output control method and device, an electric vehicle and a medium. The torque output control method comprises the following steps: in response to energy recovery starting, identifying a current working condition; if the current working condition is identified as a target energy recovery working condition, determining a target damping torque calibration value corresponding to the target energy recovery working condition according to a preset corresponding relationship between the energy recovery working condition and the damping torque calibration value; and adjusting an energy recovery torque value output by the motor through the target damping torque calibration value. Through the torque output control method provided by the application, the energy recovery torque value output by the motor can be quickly adjusted, the vehicle body can be timely ensured to be stable, and the occurrence of the vehicle body out of control can be reduced, so as to help improve the user's riding experience.

The application relates to the technical field of robot control, and discloses a robot multi-mechanical arm cooperative anti-collision control method and system, which comprises the following steps: a three-dimensional global reference coordinate system with a kinematic pivot point as the origin is established, an inside and outside work area is divided, and an outside virtual node is defined; a virtual safety monitoring section is constructed in the outside driving area, a dynamic repulsion spot is generated, collision early warning is generated through position and trend compound judgment; the virtual repulsion force is mapped into equivalent joint damping torque, and is superimposed into a servo driver current control loop; the application realizes mathematical reconstruction of the outside non-perception blind area state without an external sensor through kinematic reverse deduction and virtual force field construction, and effectively prevents implicit physical collision of external connecting rods caused by the 'cohesion and external dispersion' motion coupling of the multi-mechanical arms through force feedback of the current control loop level.

The invention discloses a quick clamping type clamp for aluminum alloy precision forgings, and relates to the technical field of clamps, the quick clamping type clamp comprises a positioning plate, a bottom plate and a plurality of cushion columns, the positioning plate is mounted above the bottom plate through the cushion columns, a clamping groove is formed in the positioning plate, and a plurality of clamping pins and auxiliary supporting pins are arranged in the clamping groove. A pair of hinge blocks and a pulling mechanism are arranged on the same side of the positioning plate and the bottom plate, a transmission mechanism is arranged below the positioning plate and connected between the pulling mechanism and the clamping pin, when the pressing rod is pulled, the magnetic disc rotates, induction current and damping torque are generated in the copper anvil disc, the springback speed of the pressing rod is effectively reduced, mechanical damage is avoided, and the service life of the pressing rod is prolonged. The transmission mechanism can be of a spring inhaul cable structure or a hydraulic structure, synchronous deflection of the clamping pins is achieved, the clamping force can be changed in a stepless mode by adjusting the position of a nut, and the aluminum alloy precision forge piece clamping device is rapid in clamping, safe to operate, controllable in clamping force and suitable for efficient machining of aluminum alloy precision forge pieces.

The invention provides a method and a system for analyzing electromagnetic scale dynamic damping characteristics of network construction type equipment, and relates to the technical field of network construction type converters, and the method comprises the steps: carrying out the equivalent transformation of a system energy amplitude dynamic simplified model, and building a system class damping torque model; calculating a system energy amplitude dynamic dominant oscillation mode; based on the system type damping torque model and the dynamic dominant oscillation mode, virtual damping torque contributed by each feedback loop to the system is calculated; according to the virtual damping torque, the relation between the energy amplitude dynamic state and the virtual damping characteristic is established, and therefore the energy amplitude dynamic damping characteristic of the system is judged. According to the method, the oscillation mechanism of the network construction converter under the electromagnetic scale is disclosed, a complete analysis process is provided, and theoretical support is provided for engineering application and control link optimization, so that the oscillation suppression capability and stability of the system are effectively improved.

The utility model discloses an adjustable permanent magnet damper, and belongs to the technical field of permanent magnet brakes, and the permanent magnet damper comprises a housing, main shafts which are respectively fixed at two ends of the housing, and main shafts which are rotatably connected in the housing and on two end covers and penetrate through the two end covers; the magnetic piece is arranged in the shell, corresponds to the outer side of the main shaft and is used for generating a magnetic field; the sliding sleeve axially moves in the shell; the magnetic sleeve is fixedly arranged on the inner side of the sliding sleeve and located on one side of the outer portions of the multiple magnetic parts, and the adjusting assembly is arranged on the shell and the end cover, connected with the sliding sleeve and used for driving the sliding sleeve to move and adjusting the length of the magnetic sleeve covering the outer sides of the magnetic parts. According to the adjustable permanent magnet damper, the position of the sliding sleeve is changed through the adjusting assembly, and then the length of the part, covering the outer side of the magnetic piece, of the magnetic sleeve is adjusted, so that stepless adjustment from the minimum damping torque to the maximum damping torque can be achieved, and various requirements for torque under different working conditions are met.

The invention discloses a hand-assisted control method for a side-opening door of an electric vehicle. The hand-assisted control method is suitable for an electric side-opening door or a vertical hinged door of the vehicle. The system comprises a driving motor, a high-resolution magnetic resistance sensor and a controller, and the magnetic resistance sensor is installed at the tail end of an output shaft of a motor rotor, right faces a radial magnetizing permanent magnet and outputs angle signals in real time; the vehicle door opening and closing angle d is calculated through the controller on the basis of the signal and the reduction ratio, and the angular speed W is calculated through the second-order central difference method at the sampling frequency larger than or equal to 8 kHz; when Wgt; when W0 is larger than or equal to delta t and the duration time is larger than or equal to delta t, the motion direction is judged according to a W symbol, and target torque is generated according to a segmented power-assisted curve: the middle stroke T1 is in direct proportion to W, the tail stroke (d is smaller than or equal to 0.1 dmax or d is larger than or equal to 0.9 dmax) T1 is linearly attenuated to zero, reverse damping torque in direct proportion to W is superposed to achieve buffering, and when Wlt is larger than or equal to delta t within 50-100 continuous periods, Wt is larger than or equal to delta t within 50-100 continuous periods; when Wmin is detected, static is judged and power assisting is stopped, IMU is not needed, the structure is simplified, response is sensitive, operation is stable and quiet, and the user experience is remarkably improved.

This invention provides a variable damping magnetohydrodynamic coupler for marine generator sets and its control method, comprising a housing, an input shaft, an output shaft, an excitation assembly, a control unit, a piezoelectric element assembly, and an auxiliary sensing assembly. A damping cavity is provided within the housing. The excitation assembly includes a magnetorheological fluid, an excitation coil, and a magnetic ring. The magnetorheological fluid fills the damping cavity, and the excitation coil adjusts the magnetic field of the magnetic ring through the excitation current to control the damping torque of the magnetorheological fluid. Based on the controllable viscosity of the magnetorheological fluid, the damping torque can be continuously adjusted over a wide range of 50~500 Nm by adjusting the excitation current to change the magnetic field strength, dynamically adapting to complex operating conditions such as shipboard turbulence and sudden load changes. Combined with the micro-compensation function of the piezoelectric element assembly, the coaxiality accuracy of the shaft system is improved to ±0.002 mm, and the resonance risk caused by over-compensation under high-speed conditions is avoided through a speed correction coefficient.

The embodiment of the invention provides a control method and system for steering of a storage vehicle based on a handle, and belongs to the technical field of storage vehicles. The control method comprises the steps that zero position calibration is conducted on a handle and a driving wheel of the storage vehicle; acquiring a mechanical steering angle of the handle and a rotating angle of the driving wheel; judging whether the mechanical steering angle of the handle is consistent with the rotation angle of the driving wheel or not; and when it is judged that the mechanical steering angle of the handle is inconsistent with the rotating angle of the driving wheel, it is judged that the whole vehicle enters a fault mode, and the steering damping torque of the handle is adjusted according to the current and the mechanical steering angle of the handle. Whether the whole vehicle enters the fault mode or not can be judged by comparing the mechanical steering angle of the handle with the rotating angle of the driving wheel, and it is ensured that the steering damping torque of the handle is adjusted in time when abnormity occurs, so that the fault risk is reduced, and the steering accuracy of the storage vehicle can be improved.

A rotary damper (1) suitable for use as a brake pedal damper with fail-safe function is provided. In the rotary damper (1) for automobile brake pedal that generates damping torque when the housing (11) rotates in the forward direction (N) relative to the rotor (12), the housing (11) is formed of thermoplastic resin, and the housing (11) is provided with a pair of radially outward protruding arms (19a, 19b) that clamp and rotate around the pedal rotation center (O) in conjunction with the brake pedal (4). In addition, the arm (19a) of the pair of arms (19a, 19b) located downstream in the forward direction (N) is provided with a curved portion (191) of constant width, and the plate (5) is supported by a support portion (192) located at a position closer to the end of the curved portion (191).

The present disclosure provides a network configuration type electromagnetic scale stabilizing control method and system based on a phase compensator, relates to the technical field of phase compensators, and comprises the following steps: obtaining virtual damping torques of each link of a network configuration converter grid-connected system; identifying a system electromagnetic oscillation dominant link based on the virtual damping torques of each link; constructing a second-order leading phase compensator and designing a controller structure thereof; calculating a phase lag angle and a margin of the electromagnetic oscillation dominant link, and calculating a phase compensation angle of the second-order leading phase compensator according to the phase lag angle and the margin; adjusting parameters of the second-order leading phase compensator according to the phase compensation angle, and performing network configuration type electromagnetic scale stabilizing control based on the second-order leading phase compensator with the adjusted parameters and the electromagnetic oscillation dominant link; and the present disclosure overcomes the electromagnetic oscillation problem in traditional control and improves the electromagnetic oscillation stability of the system.

The invention discloses a damping torque-based low-frequency oscillation suppression method for a grid-forming inverter. The method comprises the following steps of: firstly, establishing a small-signal model of a virtual synchronous machine; deriving a damping torque model based on the small signal model; an additional damping branch is introduced into the power control loop to enhance the damping torque of the system; and finally, the suppression effect of the additional damping branch on low-frequency oscillation is verified through simulation. According to the method, a damping torque method and a small signal model are combined, an additional damping branch is introduced into a power control loop, additional damping is provided under the condition that operation of an original system is not affected, and then the low-frequency oscillation phenomenon of the VSG is improved.

The invention discloses an FLNG-LNGC combined loading and unloading operation control method and system based on real-time working condition feedback, and the method comprises the steps: firstly constructing a system state space with time-space synchronization, and collecting the time calendar of a wave field and the motion response of a ship body; and reconstructing an instantaneous wave energy spectrum, resolving ship body modal parameters, and calculating a frequency detuning safety factor. When the resonance risk exists, the system executes asymmetric loading path planning based on frequency detuning optimization, and the rotational inertia of the ship body is changed by adjusting cabin flow distribution so as to shift the inherent frequency; and meanwhile, a gas-liquid coupling active suppression instruction containing variable stiffness pressure modulation and pulse momentum damping is generated, the recovery stiffness is changed through gas phase pressure, and damping torque is generated through fluid momentum. And finally, the instructions are synthesized to drive an execution mechanism. Active regulation and control of ship body modal frequency and instant dissipation of wave disturbance are achieved, the resonance risk is effectively reduced, and the stability of double-ship operation under the severe sea condition is improved.

Vehicle (10), comprising: an internal combustion engine (12) which is selectively coupled to an electric machine (14) by means of an upstream clutch, which is selectively coupled to a stepped transmission (24) by means of a downstream clutch (22); and at least one controller (42) programmed to control the internal combustion engine (12) and the electric machine (14) in anticipation of a wheel torque reversal in response to entry into a play zone, in order to set a gain applied to an active damping torque controller (670) for an electric motor to reduce vibrations and dead weight in the drivetrain, wherein the at least one controller (42) reduces the gain in advance of a torque zero point where there is air between engaging gear teeth of drivetrain components.

This application discloses a method and apparatus for tracing the source of power system oscillations, including converters and synchronous machines. Belonging to the field of power system transmission and distribution technology, the method involves: reducing the order of the power network and constructing its linearized admittance matrix; establishing port admittance matrices for all power supply equipment, including converters and synchronous machines, under small disturbances; establishing the port external admittance matrix of the synchronous machines, taking into account the impedance embedding of the converters, based on the port admittance models of the power supply equipment and the power network; sequentially calculating the port impedance of each synchronous machine and establishing its damping torque model; and identifying the synchronous machine providing negative damping torque based on the phase characteristics of the damping torque model, which is the low-frequency oscillation source of the system. This application does not require internal converter information, can achieve information isolation between different power sources, is applicable to converters with different control strategies, has clear physical meaning, can provide theoretical guidance for oscillation suppression in large-scale multi-machine power systems, and can be embedded in power system analysis software, making it of significant engineering importance.

A motor control device used in a battery electric vehicle including a motor outputting power to a drive shaft connected to an axle via a gear mechanism, the motor control device controlling the motor such that a torque that is a sum of a required torque and an execution vibration damping torque obtained by multiplying a required vibration damping torque required for suppressing vibration by a gain is output to the drive shaft, and the motor control device being configured to set the gain, when an absolute value of the required torque is equal to or larger than a value of 0 and less than a first value larger than the value of 0, to the value of 0 or a predetermined value larger than the value of 0 and less than a value of 1.

A rotary electric machine control device (42, 43) that controls a rotary electric machine (30) driven by an internal combustion engine (20) comprises: a vibration damping torque calculating unit (55) that calculates a vibration damping torque for reducing torque pulsation generated by the internal combustion engine being driven; an extracting unit (57) that extracts frequency components included in a fluctuation waveform of the rotational speed of the rotary electric machine; a correction torque calculating unit (58 to 60) that calculates a correction torque on the basis of an excess amount by which each frequency component extracted by the extracting unit exceeds a reference value, set in advance, corresponding to each frequency component; and a command value calculating unit (54, 56) that calculates a torque command value for the rotary electric machine, taking into account the vibration damping torque calculated by the vibration damping torque calculating unit and the correction torque calculated by the correction torque calculating unit.

This invention discloses a method and apparatus for analyzing low-frequency oscillations in a converter-synchronous machine hybrid power supply system, belonging to the field of power system transmission and distribution technology. The method includes: establishing a linearized model of the entire hybrid power supply system under small disturbances; establishing a port impedance model of the converter and an impedance model of the power network, as well as an external port impedance model of the synchronous machine considering the embedded internal impedance of the converter and a damping torque model of the synchronous machine; constructing a damping torque stability criterion based on the external port impedance matrix of the synchronous machine; analyzing the influence of the converter's dynamic characteristics on the phase shift of the main and auxiliary diagonal elements of the external port impedance model of the synchronous machine, and deriving the key factors inducing low-frequency oscillations in the converter-synchronous machine hybrid power supply system. This invention achieves a unified analysis framework independent of specific converter control strategies, effectively protecting the information privacy of both the power grid dispatching department and the converter operator, and providing guidance for suppressing low-frequency oscillations in converter-synchronous machine hybrid power supply systems.

The invention belongs to the technical field of clothes processing equipment, and discloses a distributor box and clothes processing equipment. The distributor box comprises a handle cavity, a distributor box body and a distributor box body, the cover plate is rotatably arranged at the opening, and the cover plate rotates from an opening position to a closing position for closing the opening under the action of reset torque of the reset piece; and the damping assembly is connected with the cover plate and provides damping torque opposite to the reset torque for the cover plate, and the damping torque is smaller than the reset torque. According to the handle, the damping assembly capable of providing the damping torque is arranged, and the reset torque provided by the reset piece can be partially offset, so that when a user pulls the hand out of the handle cavity, the rotating speed of resetting of the cover plate towards the closing position can be reduced, the blocking feeling caused by the fact that the cover plate makes contact with the hand all the time is avoided, and the user experience is improved.

The application relates to a hybrid brake control method of a servo hydraulic system, which comprises the following steps: acquiring a total brake demand of the servo hydraulic system; acquiring a real-time hydraulic oil temperature and a real-time electric quantity state of an energy storage device; executing a hierarchical decision algorithm based on the state, distributing the total brake demand into a regenerative brake torque and a hydraulic damping torque; converting the hydraulic damping torque into a compensated hydraulic control signal through a preset compensation model; and applying a first speed limit to a regenerative brake instruction converted from the regenerative brake torque, and synchronously sending the compensated hydraulic control signal. The application can balance the system thermal state and the electric quantity state, and through adaptive compensation and dynamic synchronous control, solves the problem of non-linear drift of a hydraulic valve and mismatch of multi-channel responses, and improves the precision and stability of brake control.

Clutch assembly for a hybrid module for dampened coupling of an internal combustion engine to a motor vehicle's drivetrain, with a torsional vibration damper (12) for damping rotational irregularities, a drive ring (26) coupled to the torsional vibration damper (12) via a detachable coupling device (28) in a torque-transmitting and axially relatively displaceable manner for forwarding the damped torque, a disconnect coupling (32) connected to the drive ring (26) for the selective transmission of the damped torque to a shaft (50) and a connecting element (70) for direct or indirect attachment of the torsional vibration damper (12) to a drive shaft of the internal combustion engine, wherein the coupling device (28) is provided radially outside to the connecting element (70) and the drive ring (26) is mounted and / or centered radially inside to the connecting element (70) on the torsional vibration damper (12) or the coupling device (28) is provided radially inside to the connecting element (70) and the drive ring (26) is mounted and / or centered radially outside to the connecting element (70) on the torsional vibration damper (12).

The embodiment of the invention discloses a stepless rotating device and display equipment, the stepless rotating device is used for driving a load part to rotate relative to a base, and the stepless rotating device comprises an electric driving assembly used for being fixed to the base, and the electric driving assembly comprises a rotatable output shaft; the linkage assembly is rotatably arranged on the output shaft in a sleeving mode, and the linkage assembly is used for being connected to a load component; the first damping assembly is arranged on the output shaft, and the first damping assembly is used for providing controllable damping torque between the output shaft and the linkage assembly; in the electric mode, the damping torque generated by the first damping assembly is larger than the maximum driving torque generated when the electric driving assembly works, and the output shaft drives the linkage assembly and the load component to rotate synchronously through the first damping assembly. In the manual mode, the operation torque of the external acting force applied to the load component is larger than the damping torque of the first damping assembly, and the linkage assembly overcomes the damping torque to rotate relative to the output shaft.

The invention discloses an eddy current damping type rotary nozzle and a metal forging material surface cleaning device. According to the eddy current damping type rotating nozzle, the damping disc made of the conductive material rotates in the magnetic field formed by the permanent magnet to generate eddy current, the eddy current generates damping torque, and when the damping torque and torque generated when the nozzle sprays are balanced, the rotating speed of the rotating shaft reaches a constant value. The speed is adjusted in an eddy current damping mode, and eddy current damping is in a non-contact mode, so that mechanical abrasion of ball centrifugal damping in related technologies is avoided, and the service life is prolonged. The magnet mounting disc moves in the axial direction by rotating the threaded twisting sleeve, the air gap between the damping disc and the permanent magnet is adjusted, flexible adjustment of the rotating speed of the spray head is achieved, and the problem that the rotating speed is fixed and difficult to adjust in the related technology is solved. In addition, the middle position of the damping disc serves as a part of the flow channel, so that fluid flowing through the flow channel takes away heat generated by the damping disc.