872results about "Vibration dampers" patented technology

The invention discloses a high-temperature superconducting electric maglev vehicle multi-mode damping device based on an electromagnetic shunting technology. The high-temperature superconducting electric maglev vehicle multi-mode damping device comprises a coil system and a vehicle suspension frame. Wherein the coil system comprises a vehicle-mounted superconducting magnet, an 8-shaped suspension guide coil and a propulsion coil; the vehicle suspension frame carries a vehicle-mounted superconducting magnet, a low-temperature container, a damping coil and an external circuit module. Accurate design of electromagnetic parameters is achieved through a plurality of branch parallel circuits, dynamic responses of different frequencies can be effectively matched, and multi-mode vibration reduction is achieved in a passive mode. An optimized damping effect can be provided for various vibration modes in a rail system without depending on an active control system, and the vibration reduction performance of the system is remarkably improved. Aiming at different vibration frequencies, adjustment can be carried out by replacing components such as capacitors and inductors in the branches, the structure is simple, and the cost is low.

Systems and methods are disclosed for robotic picking assemblies with highly damped suction cups. In one embodiment, an example suction cup for a picking assembly may include a shell formed of an elastomeric material, where the shell forms a first bellow. The suction cup may include a first fluid chamber disposed on an outer portion of the suction cup, a first opening, where fluid from the first fluid chamber passes through the first opening, and an optional second fluid chamber disposed on an inner portion of the suction cup. The suction cup may include an optional second opening formed in the shell, where fluid from the second fluid chamber passes through the second opening. The first fluid chamber and the second fluid chamber may be configured to dampen movement of the suction cup.

Vibration in a drill string is damped with a damping system coupled to the drill string. The damping system includes a chamber, a gas and piston in the chamber, and a mass connected to the piston. The gas defines a spring having a spring coefficient that is dependent on a volume or temperature of the chamber. The damping system is tunable in real-time by varying the volume or temperature of the chamber. In alternatives with multiple chambers interconnected to one another via ports, chamber volume at the existing pressure can be varied by selective actuation of valves between the chambers or the pressure of the gas can be varied by compressing or expanding a connected bellows or by heating or cooling the temperature of the gas. The damping system can selectively damp both radial and torsional vibrations.

A vibration absorber for securely fixing to the housing of a gearbox includes an absorber mass having a first group of segments that are rotationally symmetrical to one another with respect to a rotational axis and / or central axis of the gearbox. The segments can be rigidly connected to one another. The vibration absorber can further include connectors that are rigidly connected to two segments each.

The present invention discloses a double-annular strong magnetic array nonlinear dynamic vibration absorber and design method for suspension vibration reduction, which belongs to the field of structural vibration control. The installation position and quantity are designed according to the vibration reduction requirements, and one is usually installed at the midpoint of the suspension. The vibration absorber comprises inner and outer magnetic ring arrays, counterweights, universal wheels and a base. It feeds back the control force in the opposite direction of the suspension vibration during movement, so that the suspension vibration energy is transferred to the vibration absorber and then less returned to the suspension, and the energy is dissipated through friction between the universal wheel and the base, the installation of air dampers and other measures. It introduces nonlinear stiffness, so that the optimal parameter domain range is expanded from the line domain to the surface domain, and thus has the outstanding advantages of easy parameter tuning and high vibration reduction robustness, and is easy to install, durable, and requires no or less maintenance. It is applicable to single, double and four-cable suspensions, and is expected to achieve the goal of good vibration reduction effect throughout the life cycle of the suspension, which has positive significance for ensuring driving and bridge safety and extending the service life of the suspension.

The three-degree-of-freedom parallel vibration isolation platform with the quasi-zero stiffness characteristic comprises a static platform, a movable platform and a plurality of sets of branch chains, and each branch chain comprises a supporting column, a vertical spring, an L-shaped supporting frame, an upper connecting rod, a lower connecting rod and a horizontal spring; the lower end of the supporting column is fixed to the static platform, and the upper end of the supporting column is connected with the lower end of the vertical spring through a first adjusting mechanism. The upper end of the vertical spring is fixed below the movable platform; the lower end of the L-shaped supporting frame is fixed to the static platform, the horizontal spring is installed on the L-shaped supporting frame through the spring seat, and the spring seat, the lower connecting rod, the upper connecting rod and the movable platform form a first rotating pair, a second rotating pair and a third rotating pair which are parallel to one another. The three-degree-of-freedom vibration isolator has the flexible motion characteristic, the space three-translation-degree-of-freedom vibration isolation requirement is met, and by adjusting the pre-compression amount of the springs, the approximate zero-rigidity characteristic can be achieved in the X direction and the Y direction, and the zero-rigidity characteristic can be achieved in the Z direction.

A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and disposed inside the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway includes a fluid channel jointly defined by the motor and the enclosure and having the cooling fluid therein. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

The present disclosure introduces a shock absorption mechanism, regulating method, and control method, particularly applicable to shock absorption technology for devices like in-vehicle filming equipment. The system comprises connectors, shock absorption components, and supporting components. The connectors exhibit movable connections with the shock absorption components, while the supporting components establish drivable connections with the shock absorption components. Additionally, the connectors are also movably linked to the supporting components. A notable feature of this invention, distinct from existing technologies, is the shock absorption components' capacity to induce front-back or left-right oscillations in the supporting components through their inherent rotation when detecting a tendency for swinging. This proactive response effectively mitigates the centrifugal force resulting from camera swinging, preventing detachment between the camera and the shock absorption arm and averting camera jitter. Consequently, the stability of the recorded footage is assured.

A gyroscopic roll stabilizer includes a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling one or more bearings supporting the flywheel. The bearing cooling system enables heat generated by the bearings to be transferred through the flywheel shaft to a heat sink disposed within a cavity in the end of the flywheel shaft, and then external to the enclosure.

A double-liquid vibration-damping liquid-shaking tank for a wind turbine tower drum oriented to source network load storage coordination belongs to the technical field of wind turbine vibration-damping equipment, is a liquid-shaking damping structure externally arranged on a wind turbine main body, and comprises a wind direction plate and a liquid-shaking tank structure consisting of an annular liquid-shaking tank, a liquid partition plate, upper-layer liquid and lower-layer liquid, and the turntable fixing structure consists of a rotor and a rotor flange plate. The annular liquid shaking cabin is provided with a central through hole, is sleeved on the tower drum, is internally provided with a liquid partition plate, and is filled with two-phase liquid which has density difference and is immiscible with each other; the wind direction plate is arranged on the outer side of the annular liquid shaking cabin; the liquid shaking damping structure is fixed to the wind turbine tower fixing section through the rotor flange plate. Single shaking liquid is replaced by stably layered immiscible double liquid, the vibration reduction effect of the shaking liquid damping structure is improved, and the shaking liquid damping structure is accurately adaptive to all working conditions; and through linkage of the wind direction plate and the liquid partition plate, the vibration reduction effect of the shaking liquid damping structure is improved, the resonance effect is restrained, and the stability of the vibration reduction effect of the shaking liquid damping structure is enhanced.

The invention relates to an electromagnet nonlinear variable stiffness unit cell and metamaterial vibration isolation support which comprises an electromagnet-spring-electromagnet variable stiffness unit, an auxiliary stiffness adjusting component and a stiffness adjusting and eddy current damping energy dissipation component, and the electromagnet-spring-electromagnet variable stiffness unit comprises a first electromagnet, a second electromagnet and a pre-pressing spring. The first electromagnet and the second electromagnet are connected through a pre-pressing spring, the auxiliary rigidity adjusting component comprises a magnetic support and a hollow sleeve, the electromagnets are connected with the magnetic support through springs, the rigidity adjusting and eddy current damping energy dissipation component comprises an electrified guide plate and a magnetic guide plate, and the electrified guide plate and the magnetic guide plate are arranged on the hollow sleeve at intervals. The electromagnet-spring-electromagnet variable stiffness unit penetrates through the hollow sleeve in a suspended mode. Compared with the prior art, the time-varying controllable and adjustable rigidity in the local resonance unit in the metamaterial unit cell is realized, and the self-adaptive band gap adjustment and vibration reduction enhancement effect based on the displacement amplitude is realized.

An elastomeric bushing comprises an inner sleeve including a first end face and an opposite second end face. An elastomeric bumper is disposed around and directly engages the inner sleeve. The elastomeric bumper includes an annular void. An outer sleeve is disposed around the inner sleeve and the elastomeric bumper, spaced apart from the inner sleeve, and directly engages the elastomeric bumper. A one-piece monolithic ferrule includes a cylindrical sidewall surrounding a portion of the inner sleeve, an end wall, and a collar. The end wall radially inwardly extends from the side wall and overlaps the first end face of the inner sleeve. The collar has an outer surface positioned within the outer sleeve and within the annular void to limit the radial extent of relative movement between the inner and outer sleeves.

The invention provides an intelligent tracking and damping system for a photovoltaic support, and belongs to the technical field of intelligent light tracking and damping, and the system comprises an illumination collection module which is used for installing a preset sensor group on the photovoltaic support and collecting real-time illumination information; the light following adjustment module is used for determining a bracket angle coefficient based on the real-time illumination information and converting the bracket angle coefficient into a specific control motion parameter, and a control device adjusts the position of the photovoltaic panel according to the received control motion parameter and judges whether light following is completed or not through a preset light following algorithm; the vibration acquisition module is used for deploying a preset sensor at a key node of the bracket and acquiring vibration data of the bracket in real time; and the damping implementation module is used for analyzing the real-time vibration data and reducing vibration of the bracket based on an analysis result and a preset method. The stability and the power generation efficiency of a photovoltaic system in a complex environment are remarkably improved, and the system has relatively high intelligence and adaptability.

The present disclosure relates to a mechanical energy storage for a fluid dispensing device (10), the mechanical energy storage comprising:—a first drive spring (51) extending along a longitudinal direction (z),—the drive spring (51) comprising a first longitudinal end (53) to engage with a housing (10) of the fluid dispensing device (1) and a second longitudinal end (54) opposite to the first longitudinal end (53) to engage with a driver (30) movable relative to the housing (10) along the longitudinal direction (z),—wherein the mechanical energy storage (50) is reversibly transferable into a pre-loaded state by resiliently compressing the first drive spring (51) in the longitudinal direction (z) to thereby induce a resilient deformation of the first drive spring (51) in a first direction (y) transverse to the longitudinal direction (z), and-wherein the mechanical energy storage (50) is transferable from the pre-loaded state into an unloaded state by allowing the first drive spring (51) to relax into or towards an undeformed configuration with regard to the first direction (y) accompanied by a longitudinal expansion of the first drive spring (51).

The present invention relates to a vibration damper. The vibration damper comprises a spoke spring damper, wherein the spoke spring damper includes a central part, several spoke springs, and an outer ring part, the outer ring part radially surrounding the central part coaxially, the several spoke springs being arranged radially between the outer ring part and the central part and spaced apart from one another in the circumferential direction, the several spoke springs being elastically deformable and thereby allowing rotation of the outer ring part relative to the central part. The vibration damper further comprises a cover plate, the cover plate being fixed to the axial side of the central part and being rotatably in contact with the outer ring part, either directly or indirectly, so that when the outer ring part rotates relative to the central part, the cover plate can come into direct or indirect frictional contact with the outer ring part.The vibration damper of the present invention exhibits an improved damping effect.

The invention provides an electromagnetic quasi-zero stiffness vibration isolator and a control method, and belongs to the technical field of vibration isolation. The vibration isolator comprises a base, a positive stiffness mechanism, a negative stiffness mechanism, a positive and negative stiffness connecting mechanism and a dynamic control module. The positive stiffness mechanism adopts a hydraulic spring to provide basic positive stiffness; the negative stiffness mechanism comprises a plurality of stator units distributed on the base in an annular array and a rotor suspended in the center of a magnetic field of the stator units, and is used for generating nonlinear negative stiffness; the top end of the hydraulic spring supports a load through the bearing table and keeps a preset gap with the inner wall of the rotor; the positive and negative stiffness connecting mechanism realizes displacement transmission and cooperative adjustment; the dynamic control module comprises a displacement sensor and a controller, the sensor collects displacement signals, and the controller adjusts excitation currents of the stator units according to the signals and dynamically adjusts electromagnetic force, so that the vibration isolator is kept in a quasi-zero stiffness state. The quasi-zero stiffness state can be still kept when the load changes, load self-adaption low-frequency vibration isolation is achieved, and the system stability and the vibration isolation performance are improved.

The invention discloses a TLD damping platform for take-off and landing of a large unmanned aerial vehicle. The TLD damping platform comprises a take-off and landing platform, a water tank, a lower supporting device, a connecting device and an upper supporting device. The lifting platform is located at the top end of the water tank. The lower supporting device is located below the water tank, and an upper supporting device is arranged between the bottom end of the water tank and the lower supporting device; the side face of the water tank is connected with the lower supporting device through an obliquely-arranged connecting device. The connecting device and the upper supporting device are arranged between the water tank and the lower supporting device, so that vertical impact force generated by taking off and landing of the unmanned aerial vehicle can be effectively absorbed and dispersed, and vertical vibration of the take-off and landing platform is weakened; when the water tank deviates in the horizontal direction, horizontal vibration energy can be further dissipated through the obliquely-arranged self-resetting compression rod, and resetting of the water tank and the lifting platform is promoted.

The invention discloses an intelligent adjustable high static and low dynamic stiffness integrated active vibration isolator which comprises a base frame and an active electromagnetic unit arranged on the base frame and is used for outputting adjustable electromagnetic negative stiffness and controllable electromagnetic force and providing stable thrust for vibration isolation through the controllable electromagnetic force. The device is applied to the technical field of precise vibration isolation, the active electromagnetic unit is used for outputting large-stroke linear adjustable electromagnetic negative stiffness and controllable electromagnetic force, and the adjustable electromagnetic negative stiffness and positive stiffness mechanical springs are combined to reduce the dynamic stiffness, so that the vibration isolation bandwidth is expanded, the inherent frequency of the system is reduced to isolate the vibration of the base, and the vibration isolation efficiency is improved. The stable controllable electromagnetic thrust is used for achieving flexible active vibration control, the integrated design of high-static low-dynamic-stiffness vibration isolation and active intelligent vibration isolation is achieved, and therefore the multi-source vibration suppression problem of the high-static low-dynamic-stiffness vibration isolator is solved.

A pressure relief valve 855 comprising a cap 805 with an opening therein, a plunger 810 configured to fill the opening in the cap 805 and a spring 815 configured to hold the plunger against the cap. T

The invention provides an electromagnetic quasi-zero stiffness vibration isolation device and method based on a composite nested structure, and belongs to the technical field of vibration isolation. The device comprises a supporting base, two linear induction motor assemblies symmetrically arranged on the base and provided with a preset gap, and a suspension supporting frame composed of a vertical conductive supporting plate and a horizontal magnetic conductive supporting plate. The vertical conductive supporting plate can float up and down in the gap and forms a positive stiffness module for providing main supporting force and positive stiffness with the motor assembly, and the two eddy current stator pairs are symmetrically distributed on the left side and the right side of the horizontal magnetic conductive supporting plate and form a negative stiffness module for providing negative stiffness with the horizontal magnetic conductive supporting plate; each eddy current stator pair comprises an upper eddy current stator assembly and a lower eddy current stator assembly which are mutually exclusive up and down and float on the upper side and the lower side of the horizontal magnetic conductive supporting plate; the positive and negative stiffness modules are coaxially arranged and cooperate in parallel through a composite nested structure to realize the quasi-zero stiffness characteristic; the rigidity can be dynamically adjusted, and the vibration isolation effect and reliability are improved.

An actuator for a head-up display, includes a link attached to one end of an aspheric mirror, a driving force transmission including a lead screw to move the link, a driver to allow the lead screw to rotate along the axis of rotation of a motor as the motor is driven, a motor bracket disposed on top of the motor and attached to the driver to support the driver, a top motor mount disposed on the top of the motor, a bottom motor mount disposed on the bottom of the motor, a vibration damping part disposed between the top motor mount and the motor bracket, to absorb vibration from the motor, and a cantilever type dynamic vibration absorber disposed on both ends of the bottom motor mount, to absorb vibration from the motor.

The invention discloses a control device and a control system for a stay cable of a long-span bridge. The control device comprises an eddy current damping element, a ball screw transmission system, a first connecting piece and a second connecting piece. The ball screw transmission system converts relative axial movement generated at the two ends of the eddy current damping element into high-speed rotating movement of the conductor disc, the eddy current damping element generates a damping effect according to input current, the high-speed rotating movement of the conductor disc is hindered, the device can adapt to the working conditions that various vibration modes occur in the actual operation process of the long stay cable, and the service life of the long stay cable is prolonged. And the vibration response of the long stay cable is effectively inhibited. The invention further discloses a control system of the large-span bridge stay cable, the input current of the eddy current damping element can be adjusted in real time according to the order of the vibration mode generated by the stay cable, so that for each order of vibration mode of the stay cable, the damping coefficient of the eddy current damping element can be close to the optimal damping coefficient of the vibration mode, and the damping coefficient of the eddy current damping element is close to the optimal damping coefficient of the vibration mode. And real-time optimal control is realized.

A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and mounted in a boss that is integrally formed in the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway extends through the boss so that the cooling fluid circulates through the boss around the motor. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

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.

The invention relates to the technical field of gas bearings, and provides a high-damping foil gas dynamic pressure bearing which comprises a bearing sleeve, a supporting ring, a supporting foil, a top foil, a pin shaft, a magnet, a steel ball, a spring and a screw. A plurality of supporting rings are arranged in annular grooves axially distributed in the bearing sleeve, each supporting ring is supported by an assembly composed of steel balls, springs and screws which are distributed in the circumferential direction, the outer diameter and the width of each supporting ring are smaller than the outer diameter and the width of each annular groove in the bearing sleeve, and the supporting rings do not make contact with the bearing sleeve. The magnets distributed in the circumferential direction and the axial direction are fixed in the axial groove of the bearing sleeve, gaps are formed between the magnets and the supporting ring, magnetic force acts on the supporting ring, the supporting ring cuts magnetic induction lines generated by the magnets when moving, eddy current is generated to consume energy, and damping is provided for the bearing. The supporting foil pieces and the top foil are fixed to the bearing sleeve and supported by the supporting rings, the supporting foil pieces are used for reducing radial deformation of the top foil between the adjacent supporting rings, and the top foil provides a supporting surface for the dynamic pressure gas film. The assembly composed of the steel balls, the springs and the screws is adopted as a support, damping is provided for the relative movement of the supporting ring and the magnet, good rigidity and damping characteristics are achieved, plastic deformation is not prone to occurring, the air film gap is kept relatively stable, and the bearing capacity and stability of a rotor system are improved.

A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. For smaller units, the bearing cooling system is effective to enable a flywheel with a moment of inertia less than 40,000 lb in2 to be accelerated at a rate of 5 rpm / s or greater. For larger units, the bearing cooling system is effective to enable a flywheel with a moment of inertia greater than 40,000 lb in2 to be accelerated at a rate of 2.5 rpm / s or greater.

The invention relates to the technical field of projector equipment, and discloses a projector vibration absorption component and a using method thereof.The projector vibration absorption component comprises a tooth type kinetic energy conversion mechanism, a longitudinal rack capable of longitudinally moving along with an upper mounting base is arranged in the tooth type kinetic energy conversion mechanism, and the tooth type kinetic energy conversion mechanism is matched with the longitudinal rack; the gear generates rotation; the rotating wheel rotates along with the gear; an arc-shaped friction plate which abuts against the bottom of the rotating wheel and generates a friction heat generation phenomenon when the rotating wheel rotates and a first spiral spring which generates upward elastic pressure on the arc-shaped friction plate are arranged in each buffer type friction mechanism. According to the projector vibration absorption component and the using method thereof, the projector vibration absorption component is installed between a supporting frame and a projection electronic element, once external vibration is transmitted to the projection electronic element through the supporting frame, kinetic energy can be converted into heat energy between the components, and therefore the function of absorbing the kinetic energy on the external vibration is achieved, and negative influences caused by the vibration are reduced.

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.