564results about "Vibration dampers" patented technology

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 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.

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 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.

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.

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.

A dual-liquid vibration damping sloshing chamber for wind turbine towers, oriented towards source-grid-load-storage synergy, belongs to the technical field of wind turbine vibration damping equipment. It is a sloshing damping structure externally mounted on the wind turbine body, including a wind vane, a sloshing chamber structure consisting of an annular sloshing chamber, liquid baffles, upper liquid, and lower liquid, and a turntable fixing structure consisting of a rotor and rotor flange. The annular sloshing chamber has a central through hole, is fitted onto the tower, contains liquid baffles, and is filled with two immiscible liquids with different densities. The wind vane is arranged outside the annular sloshing chamber. The sloshing damping structure is fixed to a fixed section of the wind turbine tower via the rotor flange. This invention improves the vibration damping effect of the sloshing damping structure by replacing a single sloshing liquid with a stable, layered, immiscible dual liquid, accurately adapting to all operating conditions. Through the linkage of the wind vane and liquid baffles, the vibration damping efficiency of the sloshing damping structure is improved, the generation of resonance effects is suppressed, and the stability of the vibration damping effect of the sloshing damping structure is enhanced.

A shaft system includes an outer shaft including an inner surface defining a conduit and an inner shaft extending within the conduit. The inner shaft includes a radially extending passage having a first end and a second end. A centrifugal force activated damper extends between the outer shaft and the inner shaft. The centrifugal force activated damper includes a first member arranged between the inner shaft and the inner surface at the first end of the radially extending passage, a second member arranged between the inner shaft and the inner surface at the second end of the radially extending passage, and a connecting member extending through the radially extending passage. Rotation of the shaft system causes the first member and the connecting member to shift away from the second member into the inner surface of the outer shaft.

The present application belongs to the field of ultra-precision vibration reduction, and discloses a precision active vibration reducer compatible with a vacuum environment, comprising: a top plate, a bottom plate, and a vibration reduction unit, wherein the vibration reduction unit comprises a passive vibration reduction unit and an active vibration reduction unit connected in parallel, the active vibration reduction unit being arranged between the top plate and the bottom plate and being located outside the air spring, and the passive vibration reduction unit comprising a coaxial and vertically arranged air spring and a magnetic negative stiffness spring; the air spring comprises a main air chamber, the bottom of the main air chamber being connected to a metal sealing bellows, the top of the main air chamber being flexibly connected to the top plate; the bottom end of the metal sealing bellows being sealed and fixed to the bottom plate, so that the main air chamber becomes a vacuum-sealed cavity; the magnetic negative stiffness spring being arranged in the air spring, and its top end being fixed to the upper wall of the cavity, and its bottom end being flexibly connected to the bottom plate. The present application has excellent vibration isolation performance and good adaptability to a vacuum environment, and can meet the vibration isolation requirements of equipment such as EUV lithography machines.

A server including a server casing, an electronic module and a damping mechanism is provided. The electronic module is detachably disposed in the server casing along a sliding direction. The damping mechanism includes a bracket and a stop assembly. The bracket is slidably disposed on the server casing along the sliding direction. The stop assembly is pivotally disposed on the bracket. In response to an impact force of the electronic module to the bracket being greater than a predetermined value, the stop assembly is positioned at the server casing.

The invention discloses a self-adaptive propeller hanging system and a damping control method, and belongs to the technical field of heavy component hoisting. The system comprises a main heavy frame, a universal hinge mechanism and a self-adaptive hydraulic damping unit, the self-adaptive hydraulic damping unit comprises a cylinder barrel, a valve element and a self-adaptive valve set, one end of the valve element is connected with a propeller assembly, and the self-adaptive valve set is used for dynamically adjusting hydraulic motion resistance acting on the valve element when the lifting posture of a propeller is changed. According to the damping control method, a target damping adjusting mode is judged through posture and pressure parameter fusion, switching among a reference damping mode, an impact suppression damping mode and a locking damping mode is achieved, and automatic resetting is achieved through a spring after the locking state is relieved. According to the scheme, swing and impact of the propeller in the hoisting process can be effectively restrained, and the hoisting stability and safety are improved.

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 high dynamic response electromagnetic damping system, and relates to the technical field of dampers. Through cooperation of the sealing driving electromagnet and the resettable tension spring, instantaneous opening and closing of the circulation path of the inner cylinder and the outer cylinder are achieved; the two working modes of gear damping and stepless damping are switched, only the electromagnet needs to be cut off or excited, a valve element does not need to be mechanically inserted and pulled, the dynamic response time can be compressed to the millisecond level, and the high-frequency vibration suppression capacity and the system reliability are greatly improved; a blade-worm gear-motor closed-loop servo structure is adopted, a force sensitive resistor senses the direction and the size of oil flow in real time, and the rotating speed of the blade can be continuously adjusted within the resistance coefficient of 0-100% through a control algorithm; compared with a magnetorheological fluid type scheme depending on magnetic induction shearing, the problems of temperature drift and ferromagnetic particle deposition are solved, and the damping linearity and repeatability are ensured.

The present application discloses a primary component, a linear motor, an electromagnetic suspension and a vehicle. The primary component comprises an iron core, a partition and a liquid discharge port, wherein the iron core has a housing cavity; the partition is arranged in the housing cavity, and the partition divides the housing cavity along its axial direction to form a first cavity; the liquid discharge port is connected to the first cavity, and the liquid discharge port is arranged away from the partition; the coolant enters the first cavity through a liquid supply port arranged near the partition and is discharged from the housing cavity through the liquid discharge port.

The invention relates to a bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper. The bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper comprises a sliding support and an inertia body. The sliding support is provided with a top side. A recess is formed on the top side of the sliding support. And the shape of the inner wall surface of the concave position corresponds to the whole or part of the spherical crown shape. The inertia body is at least partially contained in the concave position in a sliding mode, and the inertia body is provided with a bottom face. And the shape of the bottom surface of the inertia body corresponds to the whole or part of the spherical crown shape. And the bottom surface of the inertia body is opposite to the inner wall surface of the concave position. One of the sliding support and the inertia body is connected with a plurality of magnets, and the other one is connected with a plurality of electromagnetic windings. And when the sliding support and the inertia body slide relatively, the plurality of electromagnetic windings and the magnet form electromagnetic induction coupling. The electromagnetic control force generated by the electromagnetic winding on the magnet can increase the offset amplitude of the inertia body relative to the balance position, so that the inertia body has larger reset force relative to the sliding support, the bandwidth of the vibration reduction frequency is widened, and the vibration reduction device can adapt to the state of large load or shutdown.

The invention discloses an electromagnetic permanent magnet hybrid quasi-zero stiffness energy feedback vibration isolator which comprises a bearing support, positive stiffness spring mechanisms, an electromagnetic negative stiffness mechanism and a pre-pressing spring mechanism, the multiple positive stiffness spring mechanisms are arranged on the outer ring in the bearing support, and the electromagnetic negative stiffness mechanism is arranged in the bearing support. According to the quasi-zero stiffness vibration isolator, the quasi-zero stiffness characteristic is achieved through parallel connection of negative stiffness permanent magnetic force and positive stiffness spring force, dynamic adjustment of the stiffness is achieved through electromagnetic force so that the vibration isolation system can reach the quasi-zero stiffness more accurately, and therefore the vibration isolation effect of the vibration isolator is improved. And meanwhile, an energy feedback coil is additionally arranged in the vibration isolator, and energy generated in the vibration process is converted into electric energy to be recycled, stored and utilized.

The invention discloses a bidirectional damping device between flexible photovoltaic support rows, and the bidirectional damping device is installed between adjacent single-layer flexible photovoltaic supports, and comprises an adjustable damper and two springs. The two springs are arranged on the two sides of the adjustable damper respectively, and meanwhile the two springs are fixedly connected with the bearing cable steel strands of the adjacent single-layer flexible photovoltaic supports respectively. Vibration in the axial direction and the tangential direction can be controlled and reduced at the same time.

A power transmission device includes an inertia ring, a plate, a plurality of first bolts, a torque transmission member, and a plurality of second bolts. The inertia ring has an annular shape. The inertia ring includes a plurality of through holes. The plurality of through holes are disposed at intervals in a circumferential direction. The plate is disposed on a first side with respect to the inertia ring in an axial direction. The plurality of first bolts are screwed into the plurality of through holes from the first side to fasten the plate to the inertia ring. The torque transmission member is disposed on a second side with respect to the inertia ring in the axial direction. The plurality of second bolts are screwed into the plurality of through holes from the second side to fasten the torque transmission member to the inertia ring.