493results 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.

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.

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.

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 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 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).

The utility model discloses a jet milling sealing device and a jet mill, and belongs to the technical field of jet mills. The sealing device comprises an air-tight sealing piece, a bearing and a center shaft, the air-tight sealing piece comprises a shell and an installation part, the shell is installed on the jet mill and matched with the grading wheel, the installation part is arranged in the shell, the bearing is installed on the installation part, the center shaft is connected with the end, close to the air-tight sealing piece, of the grading wheel, and the center shaft is installed on the bearing. The two ends of the grading wheel can be supported, the swing amplitude of the grading wheel during working is reduced, and the problem that in the prior art, the end, close to an air sealing piece, of the grading wheel is in a cantilever state, and the gap between the grading wheel and a discharging pipe is not uniform due to the large swing amplitude of the grading wheel during working is solved.

A locking washer (10) for a torsional damper (30), wherein the locking washer (10) has a corrugated shape in the circumferential direction, which is pronounced in the axial direction to reduce axial play of components of the torsional damper (30).

The invention relates to a torsional vibration damper (1) or a torsional vibration absorber comprising a rotating system having a primary mass arranged on a rotatable shaft, for example on an engine, in particular an internal combustion engine crankshaft, preferably non-rotatably fixed, and a secondary mass movable relative to the primary mass, and a component for vibration damping and / or vibration reduction of the relative movement between the primary mass and the secondary mass. The component for vibration damping and / or vibration reduction of the relative movement between the primary mass and the secondary mass has at least one pressure accumulator (15, 15'; 22, 22') within the rotating system of the torsional vibration damper (1) or the torsional vibration absorber. The invention also provides a method for damping torsional vibrations of an internal combustion engine crankshaft (2) with a torsional vibration damper (1) or a torsional vibration absorber.

This application relates to a variable pitch controllable magnetic damping oscillating propeller clamp device, including a propeller clamp assembly, a motor assembly, and propeller blades. The propeller clamp assembly includes a propeller clamp seat assembly and an oscillating arm assembly. The oscillating arm assembly includes an inverted U-shaped oscillating arm and two propeller blade mounting seats. An axial connection assembly is provided between the propeller blade mounting seats and the two ends of the inverted U-shaped oscillating arm. A rotation limiting assembly is provided between the two ends of the inverted U-shaped oscillating arm and one end of the axial connection assembly. An electromagnet assembly is provided on the propeller clamp seat assembly, and permanent magnets adapted to the two end faces of the electromagnet assembly are provided at the two ends of the inverted U-shaped oscillating arm. This invention belongs to the field of unmanned aerial vehicle (UAV) technology. It achieves precise adjustment and locking of the propeller blade pitch angle through a gear disk and a limiting mechanism, adapting to different flight requirements and improving control performance. The damping force is directly generated by the magnetic repulsion between the electromagnet and the permanent magnet, without the need for additional mechanical parts, resulting in fast response and more direct damping effect.

A torsional vibration damper comprising a primary mass (2) to be coupled to an input element, a secondary mass (6) to be coupled to an output element, and a spring damper arrangement (10) coupled to the disk-shaped primary mass (2) and the secondary mass (6), comprising several arc springs (11) against which the primary mass (2) and the secondary mass (6) are rotatable relative to each other, wherein the secondary mass (6) has an annular spring channel (9) in which the arc springs (11) are received, and wherein at least one elastic vibration damper device (22, 26) is provided on the primary mass (2). The arrangement is characterized in that the secondary mass (6) has a disk-shaped flange section (7) which transitions into the spring channel (9) at its outer circumference and to which a hub flange (17), via which the connection to the output element is made, is attached.

The application relates to a speed-increasing torsional damper for a range-extended electric vehicle and the range-extended electric vehicle, and belongs to the technical field of automobiles. The speed-increasing torsional damper comprises a planetary gear mechanism, a torsional damping mechanism and a first limiting frame. The planetary gear mechanism comprises an outer gear ring, and a plurality of first limiting frames are fixed to the outer periphery of the outer gear ring. The torsional damping mechanism comprises a driven disc and a damping spring located in the driven disc and the first limiting frame. The damping spring is used for buffering the impact force between the driven disc and the outer gear ring. Therefore, the speed-increasing torsional damper is integrated with the speed increaser, the speed-increasing torsional damper has both the torsional damping effect and the speed-increasing effect, the engine and the generator can be matched in the high-efficiency zone in the minimum space, the efficiency of the range-extended system is improved, and the speed-increasing torsional damper has the advantages of high integration degree, small occupied space, light weight, simple manufacturing process and the like.

To reduce a radiation sound caused by the resonance of a vibration ring.SOLUTION: A torsional damper 101 comprises: a hub 111 in which a boss which is fixed to a rotating shaft such as a crankshaft of an engine, and a circular rim 114 are integrally arranged via a stay 113, and a circular vibration ring 131 is connected to an external peripheral face of the rim 114 via an elastic body 121. The vibration ring 131 comprises an end face 133 having a protrusive curved face shape RS which draws a circle in a radial direction RD defined within a range of, for example, curvature radii R1 to R20 (mm). The curved face shape RS of the end face 133 of the vibration ring 131 may be arranged over an entire length of a radial length L possessed by the end face 133, or may be arranged at only a part of the entire length, and also, may be arranged at one end face 133 (133E or 133F), or may be arranged at both the end faces 133 (133E and 133F).SELECTED DRAWING: Figure 5

This utility model discloses a vibration damping structure for an engine front cover, including an outer shell. A vibration damping turbine is installed inside the outer shell, and the turbine is connected to the outer shell via vibration damping bolts. A sealing cover is installed on one side surface of the turbine, and a sealing front cover is detachably installed on the side surface of the sealing cover. A cooling impeller is installed between the vibration damping turbine and the outer shell. This utility model provides convenient sealing and assembly of the engine front cover components, using vibration damping bolts to connect and align the various cover shells. It offers advantages such as good sealing and a tight, stable connection, effectively preventing the shell from loosening due to significant engine vibration during operation. Simultaneously, the internal and external heat dissipation design of the shell allows for rapid heat dissipation from the engine, providing excellent cooling performance. The planetary gear transmission mechanism integrated into the end cover shell, combined with an eccentric wheel structure, effectively reduces vibration at the shaft end.

According to the self-adaptive damping and bionic self-balancing integrated flywheel rotor provided by the embodiment of the invention, due to the fact that the bionic multi-cavity self-balancing module does not need external regulation and control, dynamic unbalance can be compensated in real time, the dynamic unbalance far exceeds a traditional active regulation and control scheme, and vibration aggravation and bearing abrasion caused by unbalance are effectively avoided. The magnetorheological elastomer damping layer can adjust the shear modulus in a self-adaptive mode according to the vibration state, an additional external damping device is not needed, the self-repairing protection layer can conduct in-situ self-repairing on microcracks, and a brand new technical path is provided for engineering application of a flywheel energy storage system with the high rotating speed, the long service life and the high reliability.

The invention discloses a vibration suppression and energy efficiency improvement method for a marine propulsion system, and belongs to the technical field of ship vibration control and energy efficiency optimizing.The method comprises the steps that vibration signals at a middle bearing, a propeller hub and a main engine base are collected, and three paths of filtering signals are obtained through band-pass filtering; front and rear flow velocity signals and main shaft rotating speed signals of a propeller are collected, and the ratio of the flow velocity difference to the rotating speed difference is calculated to obtain an energy efficiency coefficient; the three paths of filtering signals are multiplied by the energy efficiency coefficient to generate three paths of control signals, and the three paths of control signals are output to the three piezoelectric actuators to generate displacement amounts which act on a bearing shell, the inner wall of a propeller hub and a main engine base; when the propulsion shafting vibrates longitudinally, the metal push rod drives the coil to reciprocate between the permanent magnets to generate induced current, the induced current is stored in the storage battery after being rectified and supplied to the hydraulic controller to adjust the oil flow of the hydraulic cylinder according to a control signal, and graded suppression of multi-source vibration and recycling of vibration energy are achieved. And the vibration suppression effect and the energy efficiency level of the system are obviously improved.

A variable-stiffness mechanism may be based on compliant beams. The variable-stiffness mechanism may be a compact, compliant, variable stiffness mechanism (CCVSM). Several compliant mechanisms for integrating variable-stiffness are described. The variable-stiffness mechanisms may be based on a compliant beam configuration, a crank-slider configuration, and / or a gear-slider configuration. Relative merits of the variable-stiffness mechanisms are also compared.

The present disclosure provides a torsion spring damper having a compression limiter, a first disk, and a second disk. The first disk is disposed at a first end of the compression limiter, and the second disk is disposed at a second end of the compression limiter, wherein the second end is opposite the first end. The torsion spring damper also has a tension member. The tension member is connected to the first disk and the second disk. The tension member is comprised of a block copolymer.

The invention relates to a damping device (10) with at least one damper (1a, 1b) and at least one hub (3). The respective damper (1a, 1b) is formed from spokes (2) and a tire (3). A radial and elastic or mechanically movable connection is formed between the spokes (2) and the hub (6) and / or the tire (4).

Title of the invention: Transmission shaft coupling system The present invention relates to a transmission shaft coupling system comprising: - a driving shaft (2) including a first drive spline; - a driven shaft (3) coaxial with the driving shaft including a second drive spline; - a dog clutch sleeve (30) including at least a first connecting spline adapted to drive the driving shaft in rotation about a first axis of rotation (X) and a second connecting spline adapted to drive the driven shaft in rotation;- an actuation device (10) comprising an electric motor kinematically linked to a speed reduction device, an output shaft (40) of the speed reduction device rotating about a second axis of rotation (Y), an interface component (20) disposed at the end of the output shaft and arranged to pivot within the dog clutch sleeve, and an elastic damping means (50) acting in torsion about the second axis of rotation (Y) is disposed between the output shaft (40) and the interface component (20) of the actuation device. Abstract figure: Figure 1;