781results about "Rotating vibration suppression" patented technology

A mass damper device includes a tubular housing having a first and a second longitudinal end; at least one damping mass which is received in the tubular housing with a circumferential clearance; a first resilient element and a second resilient element. At least one end closure is arranged at the first or second longitudinal end. The housing and the end closure have cooperating mounting surfaces which define a longitudinal mounting position of the first and second end closures. The mounting surfaces are arranged such that the first and second resilient elements are compressed between the damping mass and the end closure, when the first and second end closures have been mounted, at the longitudinal mounting position, to the housing.

A tubular drive arrangement (20) for a screening arrangement (10) for a window, in which a drive part (24) coupled to drive shaft and a motor of the drive arrangement comprise engagement means (24.1, 24.2) configured to be connected to counterpart engagement means (12.1, 12.2) of a roller tube (12) of the screening arrangement in an assembled condition. At least one resilient damper (31, 32) is connected to or connectable to the engagement means (24.1, 24.2, 24.3) of the drive part (24).

A vibration damper, comprising a spoke spring buffer (10), wherein the spoke spring buffer (10) comprises a center portion (11), a plurality of spoke springs (12) and an outer ring portion (13), the outer ring portion (13) coaxially surrounds the radial outer side of the center portion (11), the plurality of spoke springs (12) are respectively radially connected between the outer ring portion (13) and the center portion (11) and are circumferentially arranged at intervals, and the plurality of spoke springs (12) can elastically deform to allow the outer ring portion (13) to rotate relative to the center portion (11); and further comprising a cover plate (20), wherein the cover plate (20) is fixed on an axial side of the center portion (11), and can directly or indirectly abut against the outer ring portion (13) in a relative rotation manner, such that when the outer ring portion (13) rotates relative to the center portion (11), the cover plate (20) can be in direct or indirect frictional contact with the outer ring portion (13), thereby reducing the risk of deformation of the spoke spring buffer (10) toward an axial side.

A drive mechanism for use with an electric motor and a clutch mechanism includes a rotor shaft, a disconnect shaft, a disconnect mechanism, at least one damper element, and a part of a clutch. The rotor shaft and disconnect shaft have a longitudinal axis A. The disconnect shaft transmits torque between the rotor shaft and the clutch mechanism. The disconnect shaft comprises the part of the clutch and a shaft element. The disconnect mechanism is configured to move the disconnect shaft between an engaged position in which the part of the clutch is engaged with the clutch mechanism and a disengaged position in which the part of the clutch is not engaged with the clutch mechanism. The at least one damper element is configured to absorb at least part of any kinetic energy introduced into the disconnect shaft due to movement of the disconnect shaft.

A pendular rocker damper for a hybrid powertrain of a motor vehicle includes a primary component, a stop attached to the primary component, a secondary component rotatable relative to the primary component, a counter stop attached to the secondary component, a rocker element used for torque transmission, first and second roller bodies arranged to roll in respective guide tracks, and a compression spring. The rocker element is suspended on the primary component and the secondary component in a pendular manner. The first roller body couples the rocker element to the primary component and the second roller body couples the rocker element to the secondary component. The compression spring resiliently supports the rocker element. The stop interacts with the counter stop to support the primary component relative to the secondary component in a circumferential direction once the compression spring is displaced by a specified elastic spring deflection.

The invention discloses a low-frequency vibration isolation rotating shaft supporting structure and a construction method, and the supporting structure comprises a main body frame which comprises an inner ring, an outer ring and a partition plate, the inner ring and the outer ring are respectively used for connecting an excitation end and a response end, the partition plate is arranged between the inner ring and the outer ring, and the partition plate, the inner ring and the outer ring are connected to form a plurality of spaces; and a cell disposed in each space, the cell including a cantilever beam and a mass block. The supporting structure is based on a local resonance mechanism, the cantilever beam-mass block honeycomb cells are used, the obvious vibration isolation characteristic is achieved within the target frequency range, the structure is relatively simple, a complex manufacturing process and high material cost are not needed, and the machining difficulty and cost are reduced.

The invention relates to an intelligent tile supporting device of a radial tilting-pad sliding bearing and an online gap regulation and control method, and relates to the technical field of sliding bearing rotor dynamics. Comprising a stepping motor, a horizontal vibration displacement sensor, a vertical vibration displacement sensor, a control processor and two intelligent fulcrum devices which are symmetrically installed in the vertical direction and are of the same structure. The horizontal vibration displacement sensor and the vertical vibration displacement sensor are installed in the horizontal direction and the vertical direction of the rotor respectively and connected with the input end of the control processor, the output end of the control processor is connected with the input end of the stepping motor, and an output shaft of the stepping motor is connected with the intelligent fulcrum device. According to the invention, working parameters such as the bearing clearance and the preload can be timely adjusted on line according to the operation working conditions of the bearing and the rotor under the condition of no shutdown or disassembly, so that the rotor system has better vibration resistance and stability, and meanwhile, the sliding bearing keeps a reliable lubrication characteristic.

The invention relates to a shock absorber and an internal combustion engine. The shock absorber includes a spoke spring buffer and a friction disk. The spoke spring buffer piece comprises an outer ring part, a plurality of spoke springs and a central part; the multiple spoke springs are connected between the outer ring part and the center part in the radial direction and distributed in the circumferential direction at intervals. The plurality of spoke springs are elastically deformable in a circumferential direction to allow the outer ring portion to rotate relative to the central portion. The friction disc and the spoke spring buffering piece are coaxially arranged, and the friction disc abuts against the multiple spoke springs in the axial direction. When the outer ring part rotates relative to the center part, the friction disc makes friction contact with the multiple spoke springs. The shock absorber is low in cost, the mounting space is saved, and the friction force is easily adjusted according to requirements.

The embodiment of the invention provides a torque generation device and method and electronic equipment, and the device comprises a double-shaft torque generator which is used for alternately outputting two kinds of torque which are opposite in the same axis direction; the double-shaft torque generator comprises a plurality of gyro motors and a cam connecting rod transmission device; the plurality of gyro motors comprise at least one pair of paired gyro motors; the torque acting structure is used for receiving and transmitting torque, and the torque acting structure is located between the double-shaft torque generator and the single-shaft torque compensation device and connected with the double-shaft torque generator and the single-shaft torque compensation device through ratchet wheel structures; and the single-shaft torque compensation device is used for performing compensation according to the torque which is alternately output by the double-shaft torque generator and is opposite in direction, so that the torque received and transmitted by the torque acting structure is continuous torque in the same direction. The torque generation device provided by the embodiment of the invention can generate continuous torque without reactive force.

The invention discloses a damping-adjustable inerter shock absorber which comprises an inerter and a magneto-rheological shock absorber, the lower end of the inerter is connected with the upper end of the magneto-rheological shock absorber, the inerter comprises a ball screw (1) and a ball nut (2), and the magneto-rheological shock absorber comprises a base, an outer cylinder barrel (4), a piston (5) and a rotating barrel (6). The upper end of the rotating cylinder (6) is fixedly connected with the ball nut (2), the piston (5) and the outer cylinder barrel (4) are both fixedly arranged on the base, the lower end of the rotating cylinder (6) is connected with the outer cylinder barrel (4) in an inserted mode, the piston (5) is located in the rotating cylinder (6), and magnetorheological gel is filled among the outer cylinder barrel (4), the piston (5) and the rotating cylinder (6). The damper has the advantages of attenuating the vibration amplitude and accelerating the attenuation rate at the same time, and has a wide damping adjustable range.

The invention discloses a vibration reduction assembly, a suspension device and a vehicle. The vibration reduction assembly comprises a vibration reduction part, a fluid pump and a motor, the vibration reduction part comprises a cavity and a piston piece, an inner cavity is formed in the cavity, at least part of the piston piece is movably attached to the inner side wall of the inner cavity and divides the inner cavity into a first cavity and a second cavity, the fluid pump communicates with the first cavity and the second cavity, and the motor is in transmission connection with the fluid pump. The fluid pump can drive the motor through fluid flowing through the fluid pump, and / or the motor can drive the fluid pump to drive the fluid in the fluid pump to flow. According to the vibration reduction assembly, the piston piece can do piston motion in the inner cavity, so that fluid is pressed to react on the piston piece, and damping vibration reduction is achieved. The fluid can drive the motor to rotate when flowing through the fluid pump, the motor can convert kinetic energy of the fluid into electric energy, and energy recovery is achieved. Damping vibration attenuation and energy recovery can be independently controlled and decoupled and can also be mutually coordinated and matched, and the applicability can be improved.

A composite damping device for vibration reduction of a tower drum and blades of an offshore wind turbine belongs to the technical field of vibration reduction of wind driven generators, and is characterized by comprising a blade integration unit and a tower drum tuning unit, the blade integration unit adopts a cylindrical particle damping cavity, the center of the cylinder is connected with a mass ball through a spring, and the cavity is filled with damping particles; the steel wire rope is fixed in the blade to restrain vibration displacement; the tower tube tuning unit is connected with the mass block through a steel wire rope, the mass block is circumferentially provided with the springs and connected with the tower tube wall, the lower portion of the mass block is connected with the mass ball, and the upper periphery and the lower periphery of the mass block are connected with the tower wall through the hydraulic inerter dampers. And the working space is obviously reduced, the multi-direction vibration control capability is improved, and the method is suitable for vibration control of offshore wind turbine towers and blades.

The invention discloses a self-adaptive parameter-adjusting semi-active wind turbine blade damping system and a control method, belongs to the technical field of wind power generation, and solves the problem of how to reduce the vibration amplitude of an existing wind turbine blade. The device comprises a data processing module and a modal control module, the data processing module comprises a blade aeroelastic response monitoring unit and a data integration calculation unit, the modal control module comprises a control shell, a sliding rail is arranged at the bottom in the control shell, and a magnet and a constant mass block are arranged on the sliding rail through sliding blocks; frequency adjusting mechanisms acting on the magnet and the constant mass block are arranged at the two ends of the sliding rail; a damping adjusting mechanism acting on the magnet and the constant mass block is arranged above the magnet and the constant mass block. The data integration calculation unit is electrically connected with the frequency adjusting mechanism and the damping adjusting mechanism. By reconstructing the structural dynamic characteristics of the blade system, the vibration amplitude of an existing wind turbine blade is reduced, and the requirement for long-term stable operation of the wind turbine blade is met.

The invention discloses a master-slave shaft suppression coupling buffer damping method, and relates to the technical field of servo driver damping. The method comprises the following steps: realizing real-time communication and motion parameter exchange between a main shaft servo driver and a slave shaft servo driver through a special interface communication cable, calculating the torque upper limit of the slave shaft driver according to the torque of the main shaft driver and a preset damping parameter, and enabling the slave shaft driver to reversely move to offset the impact momentum of the main shaft; meanwhile, the speed and acceleration of the main shaft are obtained, the slave shaft driver moves reversely at the matched speed and acceleration, and it is ensured that the slave shaft driver can bear the impact of the main shaft by considering the load ratio. The method can effectively reduce the coupling effect and vibration, improve the stability and precision of the system, adapt to different working conditions, simplify the design and control process, and prolong the service life of the system.

A centrifugal force pendulum includes two pendulum flanges, a pendulum mass, a stop damper and roller bodies. The two pendulum flanges are rotationally fixed together, include respective flange cutouts, and define a pendulum mass receiving space therebetween. The pendulum mass is arranged in the pendulum mass receiving space and includes a mass cutout and a radial inner face. The stop damper is arranged on the radial inner face and includes two through-openings. The roller bodies extend through the flange cutouts and the mass cutout. The flange cutouts and the mass cutout define a movement path, the pendulum mass is movable relative to the two pendulum flanges along the movement path, and fastening elements extend through the two through-openings to connect the stop damper to the pendulum mass. A torsional vibration damper including the centrifugal force pendulum is also disclosed.

To provide a power transmission device that can be made low-cost. [Solution] The power transmission device comprises a drive plate and a torque limiter. The torque limiter comprises a first side plate, an inertia member, a friction plate, and a biasing member. The first side plate is configured to be positioned on a first axial side relative to the drive plate. The first side plate is configured to rotate integrally with the drive plate. The inertia member is positioned on a first axial side relative to the first side plate. The inertia member is configured to rotate integrally with the first side plate. The friction plate is positioned to rotate relative to the first side plate. The pressure plate clamps the friction plate in cooperation with the first side plate. The biasing member biases the pressure plate axially toward the first side plate.

A solar bracket with a damping mechanism is provided and includes: a bracket structure including a fixed component and a rotating component; a solar panel installed on the rotating component; and a damping mechanism including a rotating assembly and a damping component. The rotating assembly includes a first rotating part and a second rotating part, the first rotating part is fixedly installed on the rotating component, the second rotating part is connected to the damping component, the first rotating part is transmitted and connected to the second rotating part, and a rotation radius of the first rotating part is greater than that of the second rotating part, when the rotating component drives the first rotating part to rotate, the first rotating part drives the second rotating part to rotate, and the second rotating part drives the damping component to move to limit a rotation speed of the rotating component.

The invention relates to a torque transmission device (1), notably for a motor vehicle, comprising: – a torque input element (2), able to be rotationally coupled to a crankshaft of an internal combustion engine, – a torque output element (3), able to be rotationally coupled to at least one gearbox input shaft and / or to a rotary electric machine, the torque input element being able to pivot with respect to the torque output element about an axis of rotation, – at least one elastic return member (4) acting against the rotation of the output element with respect to the input element, – a clutch (5) selectively and through friction coupling the input and output elements, – an intermediate element (6) arranged between the elastic return member and the clutch so as to transmit the torque, and – a clutch actuation member (7), characterized in that the elastic return member, the clutch and the actuation member succeed one another radially.

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.

Torsion damper (1) for a torque transmission device comprising: a torque input element (2) and a torque output element (3) rotatable about an axis of rotation (X); elastic members (4) elastically coupling the torque input element to the torque output element in rotation; and a web (5) configured to cooperate with the elastic members, the web comprising a plurality of axially stacked layers (51, 52), each layer comprising at least two radially extending drive arms (521, 521) to be positioned circumferentially between two elastic members, the layers being connected together by their drive arms by a connecting means (6). (Abstract Figure: 1)

The utility model provides a tensioning wheel with bidirectional damping, which comprises a fixed base and a swing arm which is matched with the base and can swing around an axis, an elastic piece which is used for pressing the swing arm in a bias mode is arranged between the base and the swing arm so that the swing arm tends to deflect towards a transmission piece, and a belt wheel which rotates around the axis of the belt wheel is arranged at one end, away from the axis, of the swing arm. And the damping assembly comprises a damping ring and an abutting piece. In the loading direction and the unloading direction, damping can be generated in the two directions through the action of the damping ring and the abutting and pushing piece, and the damping magnitude in different directions can be adjusted by adjusting the sizes and angles of the abutting and pushing face and the stopping face.

A pendulum weight for a centrifugal pendulum absorber for a flywheel of a vehicle (3), comprising: - at least one bearing surface configured to, when the pendulum weight is mounted radially outside of a central axis of the pendulum absorber, cooperate with at least one corresponding bearing surface provided on a separate part of the pendulum absorber, with respect to which separate part the pendulum weight is thereby configured to be movable along a predetermined pendulum path, - at least one pocket formed in connection with the bearing surface, the pocket being configured to receive at least a portion of the separate part when the pendulum weight moves along the pendulum path, wherein the pendulum weight comprises an outward portion and a separate inward portion which are assemblage to form the pendulum weight, the outward portion being configured to be located radially outside of the inward portion with respect to the central axis when mounted, wherein the bearing surface and the pocket are both provided on one of said portions.

The invention discloses a liquid damping shock absorber which comprises an outer shell (6) and a middle shaft (2) and is characterized in that the outer shell (6) is in a barrel shape, the middle shaft (2) is installed at the bottom of the barrel through an axial supporting mechanism (14), a damping barrel is arranged in the outer shell (6) and installed on the middle shaft (2), and the damping barrel is of a cavity structure with an elastic gap in the lower bottom face. The upper end of the middle shaft (2) penetrates out of the center of an upper end cover (3) of the outer shell (6), damping liquid is contained in the outer shell (6), and the liquid level of the damping liquid is higher than the lower bottom face of the damping cylinder. According to the shock absorber, the damping liquid and the damping cylinder are organically combined, the damping cylinder extrudes the damping liquid when the shock absorber is subjected to an external load, vibration energy is counteracted through viscous dissipation and dynamic pressure generated by liquid shaking, gaps can be changed when pressure is received by the porous structure characteristics of the bottom of the damping cylinder, and the flow of the damping liquid penetrating through the gaps is influenced; therefore, the damping of the shock absorber is variable.

The invention discloses a sample collection device for geographical remote sensing surveying and mapping, the structure of the sample collection device comprises a mobile vehicle, a lifting support plate, a control box, a lifting seat and a support seat, the bottom of the mobile vehicle is provided with four moving wheels, and the upper surface of the front end of the mobile vehicle is provided with a guide column for vertically guiding the lifting support plate on the mobile vehicle. A threaded rod is rotated to drive an attaching plate to move and push in a positioning ring, so that the positioning ring is attached to the surface of the drill cylinder, an auxiliary rotating ball arranged on the surface of the attaching plate is attached to the surface of the drill cylinder for auxiliary rotation, and vibration generated in the rotating process of the drill cylinder is reduced; therefore, the stability of the drill barrel drilling into the soil downwards to collect the soil is improved, and the integrality of the drill barrel for collecting the soil is improved; cold liquid is discharged from the six auxiliary rotating balls on the surface of the attaching plate to act on the surface of the drilling barrel under the through diversion of the circulating groove and the lower discharging pipe, so that the high temperature generated when the drilling barrel rotates to drill a soil sample is reduced, and the integrity of the collected soil is prevented from being damaged by the high temperature.

The present invention discloses a variable-section arch nonlinear vibration damping device for a rotor system, comprising a disk, a rotating shaft, a variable-section arch, a rigid ring, and a limiting pin. The rotating shaft is mounted at the center of the disk, and an annular groove coaxial with the disk is provided on the side of the disk. A plurality of variable-section arches are evenly distributed circumferentially and assembled on the inner side of the annular groove. The rigid ring is separated from the variable-section arch by a predetermined distance and is located in the annular groove and on the outer side of the variable-section arch. The rigid ring is connected to the arch top of the variable-section arch by a limiting pin to limit the relative position of the arch top of the variable-section arch and the rigid ring, thereby preventing the contact position of the variable-section arch with the rigid ring from changing when the variable-section arch is deformed too much, and ensuring that the force application point of the variable-section arch is consistent under different deformations. The present invention can effectively suppress the vibration amplitude of the rotor system within a wide speed range, occupies less space than traditional nonlinear spring vibration damping devices, and is suitable for installation in rotor systems with limited space.

The application discloses a low-frequency vibration isolation rotating shaft support structure and a construction method. The support structure comprises a main frame, an inner ring, an outer ring and a partition plate. The inner ring and the outer ring are used for connecting an excitation end and a response end, respectively. The partition plate is arranged between the inner ring and the outer ring. The partition plate, the inner ring and the outer ring are connected to form a plurality of spaces. A cell is arranged in each space. The cell comprises a cantilever beam and a mass block. The support structure is based on a local resonance mechanism. The use of the cantilever beam-mass block honeycomb cell not only has obvious vibration isolation characteristics in a target frequency range, but also has a relatively simple structure, does not need complex manufacturing processes and high material costs, and reduces processing difficulty and cost.

The present application belongs to the technical field of low-frequency vibration control, aiming at the problems of high damping ratio, instability, low vibration control efficiency and unsuitable for large-scale engineering of existing inertial damper, a low-damping tuned inertial damper device is provided, which provides the possibility for the whole system to realize the required optimal damping ratio, and further efficiently controls low-frequency resonance. Unlike traditional rigid support and transmission mode, the device adopts economical, reliable and convenient flexible suspension support and transmission mode to realize low frequency and stable low damping of the system. The flexible support part and the rigid inertial device are in contact transmission around, which eliminates the high damping caused by high energy consumption due to instability caused by friction and collision in traditional inertial tuned mass damper, so as to ensure that the large inertial system realizes stable low damping ratio, meets the needs of realizing optimal control effect, and is directly applied to large engineering structure resonance control.

Torsional vibration damping device (1) with a primary mass (4) and a secondary mass (5) which is rotatable relative to the primary mass (4) against the action of at least one torsional vibration damping element (7) and by means of a bearing device (10) comprising an axial thrust washer (18), an axial friction ring (16) and a radial sliding bearing sleeve (14), wherein the axial thrust washer (18) is non-rotatably connected to the primary mass (4), wherein the axial thrust washer (18) has at least one radial projection (41-43) which is non-rotatably connected to the primary mass (4) and projects radially outwards, wherein the radial projection (41-43) engages with a drive element extending from a retaining element (25) which is attached to the primary mass (4).