290results about "Vibration dampers" patented technology

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 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 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 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 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 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.

A compliant mount for an aircraft, for attaching equipment (such as a latching unit, for example) to a structural member of the aircraft, the compliant mount comprising: a mounting member for attachment to the structural member of the aircraft; a receptacle for supporting the equipment, the receptacle being coupled to the mounting member along a longitudinal axis; and one or more spring elements arranged to resiliently bias the receptacle into alignment with the longitudinal axis and to allow angular movement of the receptacle away from the longitudinal axis. Also provided is an aircraft equipment assembly comprising such a compliant mount, and aircraft equipment supported by the receptacle, and an aircraft having one or more such equipment assemblies. The aircraft may be a folding wingtip aircraft and the equipment assembly may be part of a folding wingtip actuation mechanism.

A rotor lift assembly for a milling machine includes a first rotor lift arm, a second rotor lift arm, a cross tube, and one or more vibration damping members. A first end of the cross tube is connected to the first rotor lift arm. A second end of the cross tube is connected to the second rotor lift arm. One or more damping members are connected to the transverse tube. One or more damping members may be disposed within the interior of the cross-tube. A first end of the cross tube may be connected to the first rotor lift arm via a first set of one or more damping members, and a second end of the cross tube may be connected to the second rotor lift arm via a second set of one or more damping members.

The invention discloses a quasi-zero stiffness sound array vibration isolation device for an unmanned aerial vehicle. The quasi-zero stiffness sound array vibration isolation device comprises a positive stiffness component and a negative stiffness component. The positive stiffness component is a steel spring, the upper end is connected with the unmanned aerial vehicle connecting piece, and the lower end is connected with the negative stiffness component; the negative stiffness component comprises a cylindrical permanent magnet and an annular permanent magnet, the cylindrical permanent magnet is located in an annular space of the annular permanent magnet after the acoustic array is mounted, and the cylindrical permanent magnet and the annular permanent magnet are in a mutual exclusion state; the steel spring, the cylindrical permanent magnet and the annular permanent magnet jointly form a quasi-zero-stiffness structure, and the quasi-zero-stiffness structure is located at a static balance position under the gravity effect of the sound array and stores elastic potential energy. When the unmanned aerial vehicle is disturbed by vibration transmitted by the unmanned aerial vehicle, the negative stiffness component releases elastic potential energy and generates acting force opposite to the disturbance direction so as to counteract vibration transmission. The device has the advantages of simple structure, suppression of vibration of the unmanned aerial vehicle and transmission of aerodynamic noise to a sound array, and the like.

This invention belongs to the field of vibration reduction technology for nuclear power plant fans, specifically relating to a high-damping integrated vibration reduction foundation suitable for nuclear power fan fans. It consists of a steel frame connected to a height-adjustable vibration damper. The steel frame is welded from high-damping composite channel steel, which is composed of conventional channel steel and particulate dampers. The height-adjustable vibration damper uses the housing as the installation reference. An upper annular metal rubber is inserted into its inner cavity, followed by the upper end of the mandrel being inserted into the inner hole of the upper annular metal rubber. Then, a lower annular metal rubber is inserted into the inner cavity of the housing, with its upper end face against the mandrel. A base is then placed on top, and rivets are used to connect the base and housing through four mounting holes. Finally, the internal thread of the mounting block is screwed into the external thread at the upper end of the mandrel. This invention effectively reduces the vibration level of the fan, ensuring safe operation of the fan.

The invention discloses a magneto-rheological damping spring vibration isolator, which relates to the technical field of dampers and comprises an upper shell and a lower shell, vibration isolation springs are distributed between the upper shell and the lower shell, an oil cylinder is arranged in the center of the lower shell, a cavity is formed in the oil cylinder, a piston is arranged in the cavity, a gap is reserved between the oil cylinder and the piston, and the magneto-rheological damping spring vibration isolator further comprises an auxiliary opening. An auxiliary opening is formed in the piston, an iron core is fixedly arranged in the auxiliary opening, the magnet exciting coil is arranged on the outer side of the iron core, the outer portion of the magnet exciting coil is connected with a control circuit, and the magnet exciting coil is used for controlling the damping of the spring vibration isolator. The damping response speed is increased, the effective action size is reduced in the working state, energy consumption is reduced, when the piston moves to a certain degree due to external impact, the limiting rod and the coil form mechanical contact, displacement is automatically limited, and therefore the effect of protecting circuit components is achieved.

A spring return cartridge for a rotary actuated valve includes a torsion spring having a spring load intermediate portion extending between a first end and a second end, and a spring carrier covered by the torsion spring. The spring carrier includes a first portion rotatably fixed to the first end of the torsion spring and a second portion rotatably coupled to the second end of the torsion spring. The second portion of the torsion spring is rotatable relative to the spring carrier and relative to the first end of the torsion spring between a first rotational limit position and a second rotational limit position. The intermediate portion of the torsion spring biases the second end of the torsion spring to the first rotational limit position and maintains a spring loaded state at the first rotational limit position.

The damping-adjustable pull rod comprises an outer rod and an inner rod which are matched with each other, the inner rod is coaxially nested in the outer rod and can slide relatively, a fixing screw is sleeved between the outer rod and the inner rod in a matched mode, and an annular cavity is formed between the outer rod and the inner rod. A first damping spring and a second damping spring are installed at the two ends of the annular cavity respectively, a supporting ring is arranged in the middle of the annular cavity and located between the first damping spring and the second damping spring, the supporting ring is connected with the outer wall of the head of the inner rod through threads, and an elastic ring is installed on the outer surface of the supporting ring in a matched mode; the outer surface of the supporting ring is in interference fit with the inner wall of the outer rod through the elastic effect, continuous friction resistance is generated, damping can be provided in the whole telescopic movement process, particularly, effective buffering is provided at two limiting positions, stable friction damping is provided in the middle stroke, and the damping size can be adjusted according to actual needs.

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 motor hydraulic suspension device for an electric automobile, relates to the technical field of hydraulic suspension, and aims to solve the technical problem that the traditional hydraulic suspension cannot be adaptively matched with the complex vibration working condition of the electric automobile, and the motor hydraulic suspension device comprises a suspension shell, a vibration isolation assembly, a damping assembly, a bottom film and a vertical shaft assembly; the damping assembly comprises an outer ring, the outer ring is fixedly arranged in the middle of the suspension shell, a ring body is movably arranged in the outer ring, a threaded half groove A is formed in the inner surface of the outer ring, a threaded half groove B is formed in the outer surface of the ring body, and a damping flow channel is defined by the threaded half groove A and the threaded half groove B. According to the invention, by designing the structure which comprises the outer ring and the ring body which can move relatively, and the opposite surfaces of the outer ring and the ring body are provided with the thread half groove A and the thread half groove B which are matched with each other to define the damping flow channel, the geometrical shape of the damping flow channel can be adaptively changed only through the movement of the ring body along a thread path; the technical problem that the broadband vibration isolation performance of a traditional hydraulic mount cannot be adaptively optimized due to the fact that a damping channel is fixed is solved.

An anchoring device for anchoring a floating object to an anchor structure, including a first attachment for being constrained to the floating object; a second attachment for being constrained to the anchor structure; a damping member for damping the relative motion between the attachments for securing the first attachment to the second attachment and including a sliding chamber, a piston for sliding in the sliding chamber according to a relative motion between the attachments and a damper for damping the sliding of the piston in the sliding chamber; and a control unit including a measurement sensor for measuring the sliding of the piston; and a control board for varying the damping of the damper according to the sliding of the piston detected by the measurement sensor.

The application discloses a parameter intelligent adjustable inertial mass damper and a control method thereof, which are applied to efficient vibration control of super-long stay cables on large-span cable-stayed bridges in the field of civil engineering, and the damper is composed of an inertial mass element, a damping element, a self-power supply system and a heat dissipation system.The inertial mass element is combined with a conductor disc and a linear module through a ball screw, and the continuous adjustment of the equivalent inertial mass is realized by using a stepping motor to control the position of a sliding block; the damping element adopts an electric eddy current structure, a damping force is generated by cutting the magnetic field of a permanent magnet and an electromagnet by a rotating conductor disc, and the real-time regulation and control of the damping force are realized by adjusting the current of the electromagnet.The application realizes the real-time calculation and self-adaptive adjustment of optimal and suboptimal control parameters of a target mode by combining acceleration spectrum analysis and an optimization algorithm, and has the advantages of high power, high efficiency, compact structure, intelligent control, self-power supply and strong durability, and the vibration reduction effect of the stay cable is significantly improved.

The invention discloses a refrigeration compressor based on stable noise reduction, and relates to the technical field of compressors. The air compressor comprises a compressor shell, an exhaust pipe is fixedly installed at the top of the compressor shell, a liquid storage device is arranged on one side of the compressor shell, and a suction pipe and an air conveying pipe are fixedly installed at the top end and the bottom end of the liquid storage device correspondingly. By arranging the annular damping liquid bag, large vibration can be generated when the motor assembly in the compressor shell works, except for a silencer and a damping cover plate of the motor assembly, the compressor shell with high-frequency vibration can continuously extrude the inner walls of all positions of the annular damping liquid bag, and the damping effect of the motor assembly is improved. The annular damping liquid bag in which lubricating oil is stored deforms in real time, and then a flexible buffering effect is exerted on the compressor shell by means of the counter-acting force of internal hydraulic pressure, so that the damping and noise reduction effects are achieved, the stability of the compressor shell during working is improved, and the problem that energy consumption is too high due to the poor steady state is solved.

An apparatus for reducing vibration of a mixer for manufacturing an electrode slurry, the apparatus comprising: a rotating roller member between an inner container and an outer container extending around the inner container of the mixer; and a damping cylinder on the outer container and configured to absorb vibration transmitted through the rotating roller member to reduce the vibration.

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.

A self-leveling six-degree-of-freedom quasi-zero stiffness vibration isolation platform, comprising a base platform, a working platform and a plurality of leg mechanisms with quasi-zero stiffness characteristics arranged therebetween, wherein: the two ends of the leg mechanism are connected through a universal joint between the base platform and the working platform to realize spatial six-degree-of-freedom wide-band vibration isolation. The present application uses a nonlinear gradually hard positive stiffness structure to modulate a negative stiffness structure to design a passive quasi-zero stiffness structure and an active quasi-zero stiffness structure. The rated load of the active quasi-zero stiffness vibration isolation structure is proportional to the current size. The passive quasi-zero stiffness structure and the active quasi-zero stiffness structure are combined. By adjusting the rated load of the active quasi-zero stiffness structure, the self-leveling function of the vibration isolation platform under different loads is realized. The passive quasi-zero stiffness structure is beneficial to provide the carrying capacity and reliability of the vibration isolation platform. Compared with the existing six-degree-of-freedom quasi-zero stiffness vibration isolation platform, the present application has a large carrying capacity, high reliability, is not sensitive to the vibration isolation load, and can realize the self-leveling of the working platform under different loads, which not only ensures the excellent low-frequency vibration isolation performance of itself, but also ensures that the vibration isolation object can work normally.

To provide a multi-stable solenoid capable of providing stability to the solenoid when an armature is traveling between stable positions by reducing end stop impact force or intermediate position overshoot of the armature.SOLUTION: A multi-stable solenoid 100 includes a first wire coil 118, a second wire coil 120, and a third wire coil 122, and a magnetic damper 138 composed of a first damping ring 140, a second damping ring 142, and a third damping ring 144. The magnetic damper 138 forms a closed conductive path around a center axis 108. As an armature 124 and a permanent magnet 126 move between stable positions, current is induced inside the magnetic damper 138 and opposing magnetic damping force is generated. When the armature 124 is fired to a center magnetic detent position, overshooting is inhibited and prevented. When the armature 124 travels to a first end position or a second end position, impact force can be reduced.SELECTED DRAWING: Figure 5

The present application relates to the field of hydrogen fuel cell, in particular to a kind of hydrogen fuel cell assembly, including fuel cell stack body, two cross beams are fixed between the two side end plates of fuel cell stack body, two cross beams are arranged in the lower side position of end plate, and the slide plate is jointly provided below the lower portion of two cross beams, slide plate is close to end plate setting, the accommodation slot of clamping cross beam is opened in the upper surface of slide plate, and the lower surface of slide plate is slidably connected with guide rail;The cooperation of fuel cell stack body and buffer bag is set, the inflation of buffer bag is realized by the buffer movement stroke of fuel cell stack body, when buffer spring is extruded or pulled to move buffer, the soft protection wall formed by the inflation of buffer bag is used for protection, avoid rigid collision between fuel cell stack body and vehicle body, reduce the impact effect on vehicle body, to realize the protection to vehicle body and fuel cell stack body.

The invention provides an anti-torsion machine table and an anti-torsion device thereof. The anti-torsion machine table comprises a machine table body and at least one anti-torsion device. The anti-torsion devices are oppositely arranged on the two sides of the machine table body respectively, each anti-torsion device is provided with a base, a support, an elastic arm and a damper, the elastic arms are connected to one side of the base and the bottom of the support respectively, a preset included angle is formed between the base and the support, and the dampers are connected between the base and the support. The torsion resisting device can preload torque and lateral force on the machine body so as to balance torsion borne by the machine body and reduce vibration of the machine body.

The invention relates to the technical field of semiconductors, in particular to a wafer processing caching device and a processing method thereof.The wafer processing caching device comprises a caching module, manipulator mechanisms are connected to the two sides of the caching module respectively, each manipulator mechanism comprises a manipulator body assembly, and a damping anti-disengaging mechanism is connected to each manipulator body assembly and comprises a passive hydraulic assembly; the passive hydraulic assembly is connected with the manipulator body assembly, the manipulator body assembly is further connected with a hydraulic deflection assembly, and the upper end and the lower end of the hydraulic deflection assembly are both fixedly connected with limiting damping assemblies. And then the air enters the air bag from the air outlet of the airflow transition bin, the air bag is expanded, the spring is stretched at the moment, the air bag clamps the wafer, vibration can be effectively absorbed, and the risk that the wafer is damaged due to vibration is reduced.

The present application relates to the technical field of test equipment, in particular to a three-comprehensive vibration environment test box, which comprises a box body and a connecting frame, one side of the box body is provided with a test station area for placing test pieces to carry out multi-environment simulation test, a connecting frame is arranged in the test station area, a multi-directional movable connecting plate is arranged in the middle of the connecting frame, and an inflatable part is tightly connected between the connecting frame and the connecting plate. By arranging the annular inflatable part on both sides of the connecting frame for providing vibration effect, when the connecting frame moves horizontally or vertically, the inflatable part will expand and abut against one side of the connecting frame, thereby increasing the friction between the inflatable part and the connecting frame, reducing the shock feeling and providing certain noise reduction effect.