121results about How to "Good vibration reduction effect" patented technology

The invention relates to the field of electromagnetic vibration damping devices for changing fluid viscosity and adjusting damping properties, in particular to a bidirectional adjustable magneto-rheological inerter damper. The bidirectional adjustable magneto-rheological inerter damper comprises a first terminal (11), a second terminal (12), a first end plate (21) and a second end plate (22), and is characterized by further comprising a screw (3), screw balls (41), channel balls (42), an input ring (51), an output ring (52), a continuously variable transmission (6) and a controllable damping system (7), and the continuously variable transmission (6) comprises a stator (61), an idle wheel (62), a shell (65), traction fluid (66) and the like. And the controllable damping system (7) comprises a fixed pipe (71), a fixed pipe rotor (72), a rotor bearing (73), a flywheel (76), an electromagnetic coil group (77), a controller (78) and a direct-current power supply (79). Space is saved, and the vibration control performance is good.

The invention discloses a gearbox vibration and noise reduction structure, and relates to the technical field of gearboxes. The problem that an existing gearbox is large in noise in the operation process is solved. The box comprises a box body, a vibration reduction layer and a noise reduction layer are sequentially arranged on the inner wall of the box body, the vibration reduction layer is located on the side close to the box body, the vibration reduction layer is attached to the inner wall of the box body, the noise reduction layer is located on the side away from the box body, the vibration reduction layer is bent along with the box body to achieve vibration reduction, and the noise reduction layer absorbs and obstructs noise to achieve noise reduction. When the vibration reduction layer bends and vibrates along with the box body, the tension and compression deformation of the vibration reduction layer converts vibration energy into macromolecular chain or chain segment movement, mechanical energy is converted into heat energy through intermolecular internal friction to be consumed, meanwhile, generated noise can be absorbed by the noise reduction layer, noise diffusion is further prevented, and the noise reduction effect is improved. Therefore, the high-frequency vibration noise of the box body is suppressed, and the noise is controlled.

The invention provides a mobile semi-active tuned mass damper based on computer vision and monitoring data, which comprises a footbridge main body structure part, a mobile semi-active control part and a computer vision and monitoring data part, and is characterized in that the footbridge main body structure part comprises a bridge deck, a box girder cavity and a guide rail; the movable semi-active control part comprises a rolling trolley, a semi-active tuned mass damper, a temperature controller and a current controller; the computer vision and monitoring data part comprises a camera, an acceleration sensor and a control center computer, the frequency, rigidity and damping force of the semi-active tuned mass damper are adjusted through the control center computer, and the positions of the rolling trolley and the semi-active tuned mass damper are controlled. According to the damper, the vertical frequency, rigidity and damping force of the tuned mass damper can be adjusted in real time, intelligent vibration control over moving random crowds with different densities is achieved, and the better vibration reduction effect is achieved.

The invention discloses an elevator guide rail shock absorber, and relates to the technical field of shock absorption, the elevator guide rail shock absorber comprises a shell and a shock absorption piece installed on the shell, the shock absorption piece is used for connecting an elevator guide rail, the shell is used for being fixed on the inner side wall of an elevator shaft, and the shock absorption piece comprises at least one first side plate and at least one second side plate; the first side plates and the second side plates are alternately arranged, the adjacent first side plates and second side plates are in butt joint at an angle, the distance between part of the second side plates and the first inner wall of the shell is larger than the distance between the part of the second side plates and the second inner wall of the shell, and the first inner wall is opposite to the second inner wall. A damping material is filled between the part of the second side plate and the first inner wall; the distance between the other part of the second side plate and the first inner wall is smaller than the distance between the part of the second side plate and the second inner wall, and the space between the part of the second side plate and the second inner wall is filled with vibration reduction materials. The damping device has the advantages of being good in damping effect and compact in structure.

The invention belongs to the field of overhead transmission lines of power systems, and relates to a vibration damping spacing device for multiple insulator strings, which comprises a horizontal vibration damping connecting component connected with the insulator strings in the horizontal direction, and the horizontal vibration damping connecting component comprises a connecting plate, a first vibration damping assembly, a second vibration damping assembly and a third vibration damping assembly. The upper portions and the lower portions of the ends, close to each other, of the two connecting plates are movably connected with one end of a first vibration reduction assembly, the other end of the first vibration reduction assembly is movably connected with small triangular plates, a second vibration reduction assembly is movably connected between the two small triangular plates, and the two sides of the second vibration reduction assembly are movably connected with one ends of two third vibration reduction assemblies. And the other end of the third vibration reduction assembly is movably connected with one side of the first vibration reduction assembly, so that a triangular structure is formed among the three vibration reduction assemblies. According to the invention, the absorption efficiency of vibration energy is high, and the vibration reduction effect is better especially for large-amplitude vibration and swing between multiple insulator strings.

The invention discloses a porous gas thrust bearing with an elastic ring type squeeze film damper, and belongs to the technical field of mechanical bearings. Comprising a bearing base internally provided with a damper mounting groove, an elastic ring, a grading ring, an oil seal and a fan-shaped transmission element which are sequentially arranged in the damper mounting groove from bottom to top, a bearing cover arranged on the outer side of the damper mounting groove and connected to the end face of the bearing base, and a tilting pad and a porous mass block which are arranged on the outer side of the bearing cover. T-shaped connecting plates are connected to the outer end faces of the fan-shaped transmission elements through flexible pivots, T-shaped grooves are formed in the inner end faces of the tilting pads, and the T-shaped connecting plates of the fan-shaped transmission elements are connected with the molded surfaces of the T-shaped grooves in a matched mode through penetrating rectangular holes formed in the outer side faces of the bearing covers in a penetrating mode. The T-shaped groove is connected with the T-shaped connecting plate in a matched mode, elastic bending deformation is generated through the flexible pivot to drive the tilting pad to swing in a self-adaptive mode, the bearing structure is simplified, the service life of the bearing is prolonged, and the reliability of the bearing is improved.

The utility model discloses a steel spring vibration isolation floating floor for a multifunctional indoor venue, which comprises a structural floor layer, a steel spring vibration isolation layer and a floor surface layer, the steel spring vibration isolation layer is laid on the structural floor layer, and the floor surface layer is laid on the steel spring vibration isolation layer. The multifunctional indoor venue steel spring vibration isolation floating building floor slab has the advantages that the multifunctional indoor venue steel spring vibration isolation floating building floor slab is supported by the steel spring vibration isolators, gaps exist between the multifunctional indoor venue steel spring vibration isolation floating building floor slab and the bottom faces of the installation grooves, a vibration isolation system is formed, and therefore the purposes of energy dissipation and vibration reduction are achieved; vertical vibration generated under the action of daily activities of people can be effectively isolated from the floor, the vibration peak value is small, the vibration reduction effect is good, the stadium can achieve the design and use effect, and the safety and vibration resistance of the stadium are remarkably improved; floating floors are adopted, manufacturing and mounting are easy, and maintenance and replacement are convenient; optimized design can be carried out according to different floor slab structures and vibration reduction requirements, and therefore the optimal vibration reduction effect is achieved.

The utility model relates to the technical field of keyboards, and discloses a spring damping buffer structure for a keyboard, which comprises a keyboard whole body, the keyboard whole body comprises keyboard keys and a buffer mechanism arranged below the keyboard keys, and the lower part of the buffer mechanism is connected with a damping mechanism; the buffering mechanism comprises a bearing seat, a buffering spring is connected to the lower portion of the bearing seat, the bottom end of the buffering spring is connected to the mounting plate, and a connecting seat is mounted below the mounting plate. When a user presses the keys of the keyboard, the buffer mechanism below the keys firstly absorbs part of impact force through the buffer spring. And through the high-elasticity design of the reset springs and the buffer springs, the keyboard keys can still keep good hand feeling and vibration reduction effect after being used for a long time.

The present invention discloses a concrete beam with a vibration regulating structure and a construction method thereof, wherein the concrete beam with a vibration regulating structure comprises: a concrete beam arranged between two concrete columns and a first steel beam arranged between the two concrete columns, the first steel beam and the concrete beam are arranged with an interval up and down, and the concrete beam and the first steel beam are connected by a symmetrically arranged second steel beam; one end of each of the second steel beams is fixedly connected to the concrete beam, and the other end thereof is inclined from the second steel beam to the first steel beam; each of the second steel beams is arranged with a gap between the first steel beam, and the second steel beams are connected to the first steel beam through a vibration reduction connection assembly. The advantages of the present invention are ingenious structure and simple construction, the first steel beam and the second steel beam are fastened to form a whole after being deformed by force, the vertical pre-tension stress between the two can withstand the vibration deformation energy generated by the production equipment, thereby reducing the vibration energy of the concrete beam, and the vibration reduction effect is good and the safety is high.

The utility model discloses a torsion-limiting shock absorber, which relates to the field of automobile transmission systems and comprises a flywheel assembly, a driven disc assembly, a bearing disc, a belleville spring and a cover, the driven disc assembly, the bearing disc, the belleville spring and the cover are sequentially placed on the flywheel assembly, the cover and the flywheel assembly are locked and fixed through bolts, and the belleville spring is tightly pressed on the bearing disc. The bearing disc is used for pressing the driven disc assembly on the flywheel assembly; the driven disc assembly has two-stage pre-vibration reduction and one-stage main vibration reduction, the rotation angle range of the first-stage pre-vibration reduction is smaller than 7 degrees, the rotation angle range of the second-stage pre-vibration reduction is 7-12 degrees, and the rotation angle range of the main vibration reduction is 12-30 degrees; a plurality of supporting blocks are evenly distributed along the outer edge of the outer disc hub, and the rotating angle of the supporting blocks relative to the outer disc hub ranges from 0 degree to 18 degrees. The damping device has the advantages of being compact in structure, reasonable in layout and convenient to assemble, and can meet the damping performance requirements of the hybrid electric vehicle in different working modes such as idling parking, flat road or slope starting, rapid acceleration or rapid deceleration and the like.

The present invention discloses a shock absorber, comprising a connector 1, a connector 2 and a plurality of shock-absorbing wires, wherein the two ends of the shock-absorbing wires are respectively connected to the connector 1 and the connector 2, and the connection of the shock-absorbing wires on the connector 1 forms a connection surface 1, and the connection of the shock-absorbing wires on the connector 2 forms a connection surface 2, and the connection surface 1 is inclined to the connection surface 2. The shock absorber of the present invention realizes multi-dimensional shock absorption of a single element, has a good shock absorption effect, can effectively simplify the vibration isolation mechanism of the aircraft, reduce the required assembly space, improve the compactness of the structure, reduce waste weight, and improve the carrying capacity of the unmanned aerial vehicle.

The present invention discloses an adjustable vibration damping rotor, comprising a rotor mechanism and a rotating shaft arranged coaxially, wherein the rotating shaft is installed in the rotor mechanism, wherein the rotor mechanism comprises an injection molded part, multiple groups of outer rotor cores, multiple groups of permanent magnets, an inner rotor core and an elastic member, wherein the multiple groups of outer rotor cores and the multiple groups of permanent magnets are spaced and arranged circumferentially, wherein the inner rotor core is sleeved between the multiple groups of outer rotor cores and the multiple groups of permanent magnets distributed circumferentially, and the multiple groups of outer rotor cores and the multiple groups of permanent magnets are embedded in the injection molded part. The present invention can rotate from the installation cavity to the installation cavity through the outer extension block, and the inner buckle part and the inner rotor core are in contact with the elastic member with the maximum area, and the elastic member can be firmly adhered to avoid separation, and since the outer extension block is blocked by the transverse bars and the longitudinal bars on all sides, and is covered by the elastic member, a good vibration damping effect is achieved and excessive shear force is avoided.

The application discloses a multi-mode magneto-rheological actuator, which comprises a magneto-rheological damper, a working cylinder and a control cylinder which are connected in parallel, a piston is arranged in the working cylinder, so that the working cylinder is divided into a first working cavity and a second working cavity by the piston; an adjusting valve core is arranged in the control cylinder, so that the control cylinder is divided into a first control cavity and a second control cavity by the adjusting valve core; the first working cavity, the second working cavity, the first control cavity and the second control cavity are filled with magneto-rheological fluid; the first working cavity is communicated with the first control cavity, and the communication flow in the two cavities is controllable; the second working cavity is communicated with the second control cavity, and the communication flow in the two cavities is controllable; the two cavities are filled with magneto-rheological fluid; the magneto-rheological actuator has two working modes, a mode switching switch of active damping and magneto-rheological semi-active damping is formed by a motor and the adjusting valve core, and model selection is actively carried out for different scenes, so that the damping requirements of different application scenes can be met.

The utility model discloses an iron core assembly, a linear motor, a suspension system and a vehicle, the iron core assembly comprises a central shaft, the peripheral wall of the central shaft is provided with a first positioning part extending along the axial direction; the central shaft is sleeved with the iron core unit, a second positioning part is arranged on the inner circumferential wall of the iron core unit, and the first positioning part and the second positioning part are matched to limit the central shaft and the iron core unit in the circumferential direction; and the first positioning part and the central shaft are integrally formed, or the second positioning part and the iron core unit are integrally formed. According to the iron core assembly designed by the utility model, the matching surface of the first positioning part and the second positioning part is the arc-shaped surface, so that the matching surface of the first positioning part and the second positioning part in the circumferential direction is larger and the transition is smoother; the shearing stress surface area between the first positioning part and the second positioning part is increased, the problem of stress concentration can be avoided, and the bearing capacity of the first positioning part and the second positioning part to shearing force is improved.

The golf swing practice rod comprises a first rod body, a second rod body, a grip and a rod head, external threads are arranged on the periphery of the upper portion of the first rod body, internal threads are arranged on the inner side of the lower portion of the second rod body, and the external threads of the first rod body are connected with the internal threads of the second rod body through a thread structure. A sliding rod is fixedly installed in the middle of the interior of the first rod body, a permanent magnet is slidably installed on the sliding rod, and an electromagnet is fixedly installed above the permanent magnet and in the first rod body. The rod body extends and retracts through threaded connection, and can be used by practicers with different heights; meanwhile, a magnetic attraction device is arranged in the rod body, potential safety hazards are avoided, the magnitude of current can be adjusted through a current regulator according to different requirements of practicers so as to adjust the magnitude of attractive force between the permanent magnet and the electromagnet, the practice difficulty level can be adjusted, the swing posture of the practicers can be corrected, and the swing strength can be exercised; therefore, a better exercise effect is achieved.

The utility model relates to the field of motors, in particular to a motor stator insulation structure, which comprises a stator framework. A plurality of winding frames are arranged on the stator framework in the circumferential direction of the stator framework, and winding grooves are formed between the adjacent winding frames; a wiring frame is constructed above the stator framework, and a wiring groove is constructed on the wiring frame; a wiring board can be fixedly connected to the wiring frame, a printed electrical circuit is preset in the wiring board, and a three-phase wire connector connected with the printed electrical circuit is constructed on the side, facing the winding frame, of the wiring board. The motor stator insulation structure can adopt the same set of winding framework to be compatible with 220V and 380V working environments.

A torsional vibration damper comprises a torsion shaft and a first damping device used for applying force opposite to the relative rotation direction of the torsion shaft, and the first damping device comprises at least one first magnet connected to the torsion shaft and at least one second magnet arranged on the movement track of the first magnet. The opposite positions of the first magnet and the second magnet have the same polarity. The characteristic that like poles repel each other is utilized, and the magnets with opposite like poles are arranged as damping devices, so that damping force opposite to the rotation direction of the torsion shaft is provided, and the damping effect is achieved. Besides, a set of electromagnetic damping device is further arranged, when the torsion shaft rotates, the electromagnetic coil and the magnet move relatively, magnetic lines are cut to generate current, a reverse magnetic field is generated at the same time, damping force for preventing relative movement is formed, and therefore the vibration reduction effect is achieved. The damping device is simple in structure, high in response speed, good in damping effect and convenient in damping force adjustment.

A steering wheel and airbag mounting structure includes a steering wheel frame and an airbag housing, at least three groups of connecting components are arranged between the steering wheel frame and the airbag housing, and the connecting components are limited by fixed clips mounted under the steering wheel frame; the connecting components include a connecting bracket, a connecting hook, a horn spring and a supporting spring, the upper end of the connecting hook is movably inserted into a T-shaped slot arranged on the bottom surface of the airbag housing, and the movable gap is greater than the upper limit of the horn contact stroke, and the lower end of the connecting hook is inserted into a jack arranged on the steering wheel frame and is clamped by a fixed clip; the horn spring, the connecting bracket and the supporting spring are sequentially sleeved on the connecting hook from top to bottom; the connecting bracket is movably clamped with the bottom of the airbag housing, and the movable gap is greater than the upper limit of the horn contact stroke; the connecting bracket is fixedly clamped with the connecting hook. The structure has a good vibration reduction effect, and can effectively prevent the automobile steering wheel system from generating abnormal noise due to contact or horn rebound, thereby improving the user's driving experience.

The utility model discloses a rubber shock absorber. The rubber shock absorber comprises a mounting seat, a rubber shock absorption body and a metal piece, the rubber damping body is fixed on the mounting seat, and a plurality of mounting holes are formed in the mounting seat; and the metal piece is partially embedded into the rubber vibration reduction body along the central axis. By improving the structural design combination between the rubber part and the metal part, the vibration reduction structure which is convenient to install and good in vibration reduction effect is formed; the rubber shock absorber can effectively prevent metal parts from being rusted, has the advantages of low inherent frequency, moderate damping ratio and high transverse rigidity, is low in dynamic coefficient, good in vibration isolation effect, small in size, stable in performance and the like, and is particularly suitable for shock absorption installation of mechanical equipment such as fans, water pumps, engines and air compressors. The shock absorber has a remarkable shock absorption effect on equipment which is shocked and vibrated.

The present invention discloses a rotor assembly and a motor having the same. The rotor assembly includes a rotor core, a permanent magnet, a rotating shaft, a transmission member and a second end vibration damping member. The rotor core has a magnet slot and a rotating shaft hole. The permanent magnet is arranged in the magnet slot. The rotating shaft is arranged in the rotating shaft hole and there is a gap between the rotating shaft and the rotor core. The first end and the second end of the rotating shaft extend out of the rotating shaft hole. The first end vibration damping member is arranged on the first end face of the rotor core and connected to the rotor core. The transmission member is arranged in the first end vibration damping member and the transmission member cooperates with the rotating shaft. The second end vibration damping member is arranged on the second end face of the rotor core and connected to the rotor core. The second end vibration damping member directly cooperates with the rotating shaft. The rotor core drives the rotating shaft through the second end vibration damping member and sequentially through the first end vibration damping member and the transmission member. The rotor assembly of the present invention increases the material amount of the vibration damping member, has good noise reduction and vibration reduction effects, and has high reliability.

The invention discloses a copper-based powder metallurgy friction material containing composite iron powder and a preparation method of the copper-based powder metallurgy friction material. The friction material is prepared from, by weight, 45%-60% of electrolytic copper powder, 10%-20% of the composite iron powder, 10%-15% of granular graphite, 1%-5% of barite, 3%-6% of tungsten oxide, 2%-4% of high-carbon ferrochrome, 2%-4% of silicon dioxide and 1%-2% of porous zirconium carbide ceramic. Compared with the prior art, the friction material has the positive effects that the iron powder prepared by two different processes is added into the friction material, and optimal granularity matching is carried out, so that the strength and the hardness of the material are improved, and meanwhile, the noise generated in the braking process is effectively reduced. According to the invention, the porous zirconium carbide ceramic is added into the friction material, so that the heat resistance of a brake pad can be improved, the stability of a friction coefficient is ensured, and vibration and noise during braking are reduced.

The invention relates to the technical field of geographical research information equipment, in particular to a geographical research information equipment installer which comprises an information equipment body and an installation seat, the installation seat is arranged below the information equipment body, a plurality of installation holes are formed in the edge of the bottom of the installation seat, and bolts are arranged in the installation holes. A mounting groove is formed in the center of the bottom of the information equipment body, a mounting block is slidably arranged in the mounting groove, a circular cavity is formed in the mounting base, a circular opening is formed in the center of the top of the circular cavity, a movable disc is slidably arranged in the circular cavity, and a transverse vibration reduction mechanism is arranged on the circumferential wall of the movable disc; the transverse vibration reduction mechanism can provide vibration reduction for the information equipment body in the horizontal direction. Buffering and vibration reduction can be provided for the information equipment body in all directions, the vibration reduction effect is excellent, the service life of the information equipment body is prolonged, the information equipment body can be conveniently disassembled and assembled during follow-up maintenance, and the labor intensity of workers is reduced.

The invention relates to the technical field of ship propulsion system equipment, in particular to an active vibration reduction thrust bearing based on an air spring. Through the low-rigidity design of the air bag vibration isolation elements, ultralow-frequency control over longitudinal vibration of the propeller shaft system can be achieved, the longitudinal vibration of the propeller shaft system is controlled to be expanded within the ultralow-frequency range of 5 Hz, and longitudinal vibration transmission of a shaft system can be effectively isolated; by means of displacement monitoring and active thrust control, effective transmission of shaft system thrust is achieved, the problem that shaft system operation displacement is too large due to low-rigidity design of vibration isolation elements can be avoided, and operation safety of a paddle shaft system is guaranteed; the active vibration reduction thrust bearing is good in vibration reduction effect, suitable for various ship propeller shaft systems, especially suitable for special deep water submersible vehicles, and has certain reference value for axial vibration reduction of rotating machinery or systems in the same axial hydrostatic load state.

The present invention relates to the field of rail transit technology, and discloses a vibration-damping prefabricated track structure with unloadable support and a construction method, wherein the structure includes a grouting layer, a vibration-damping cushion layer and a prefabricated track plate in order from bottom to top; the vibration-damping cushion layer is arranged between the prefabricated track plate and the grouting layer; the grouting layer is made of a self-compacting concrete material with good fluidity, and the grouting layer is used to support the prefabricated track structure; the vibration-damping cushion layer and the prefabricated track plate are composited into one body, and the vibration-damping cushion layer is arranged under the prefabricated track plate for vibration reduction; two prefabricated plate reserved guide grooves that can be engaged with wedge-shaped support blocks are provided on both sides of the prefabricated track plate, and before the grouting layer is formed, the wedge-shaped support block is used to support the vibration-damping cushion layer and the prefabricated track plate, and after the grouting layer is formed, the wedge-shaped support block is unloaded internally, and the support of the wedge-shaped support block to the vibration-damping cushion layer and the prefabricated track plate is cancelled, so as to achieve contact between the vibration-damping cushion layer and the grouting layer. The vibration-damping prefabricated track structure of the present invention has a good vibration reduction effect.

The present invention discloses a compressor vibration reduction mounting structure, which is applied to a compressor; it includes a chassis and a compressor foot, and also includes: an elastic foot pad assembly is located on the chassis, the upper end of the elastic foot pad assembly is connected to the compressor foot; the upper part of the elastic foot pad assembly has a second through hole; the lower part of the elastic foot pad assembly has a first through hole connected to the second through hole; the aperture of the second through hole is larger than the aperture of the first through hole; the lower end of a fastener is connected to the chassis and matched with the first through hole; the fastener passes through the first through hole and the second through hole; a fixing part is connected to the fastener to lock the elastic foot pad assembly on the chassis. The compressor vibration reduction mounting structure provided by the present invention is easy to assemble, simple in structure, good in vibration reduction effect, and realizes the maximum attenuation of the compressor vibration energy in the up and down directions and the torsional tangential direction; an air conditioning device having the compressor vibration reduction mounting structure is also provided.

The utility model discloses an energy accumulator with one-way adjustable damping, which belongs to the technical field of hydro-pneumatic suspension systems, and comprises an energy storage main body, a piston, an inflation joint and a damping adjusting component, the piston is in sliding connection with the energy storage main body and is arranged in the energy storage cavity; the inflation connector is detachably connected with the energy storage body and arranged on one side of the energy storage body. One end of the damping adjusting assembly penetrates through the energy storage body and extends into the energy storage cavity, the other end of the damping adjusting assembly is used for being communicated with the hydro-pneumatic spring, and a connecting cavity is formed in the damping adjusting assembly and communicated with or disconnected from the energy storage cavity through opening and closing of the damping valve body or the one-way valve body. The energy accumulator with the one-way adjustable damping solves the problems that in the prior art, the requirement of a user for personalized damping cannot be met, adjustment is inconvenient, the structure is complex, and disassembly, assembly and maintenance are difficult. The utility model has the advantages of simple structure and obvious effect, and is suitable for wide popularization.

The utility model discloses an explosion-proof valve with a compensation sealing structure, which comprises a valve body, a front end cover arranged on the valve body, a pilot head component arranged on the front end cover, a valve cavity arranged between the valve body and the front end cover, a spacer bush component arranged in the valve body, a valve rod movably arranged in the spacer bush component, a large piston arranged in the front cavity and a large piston arranged in the rear cavity. The valve rod abuts against the large piston, the interior of the valve rod is hollow, a gas channel is formed in the valve rod, the front end of the spacer bush assembly is provided with an annular protrusion A and an annular protrusion B, the annular protrusion A and the annular protrusion B are matched to form a mounting groove, the outer wall of the annular protrusion A is sleeved with a sealing ring A, a sealing ring B and a sealing ring C are arranged in the mounting groove, and the outer wall of the sealing ring C is sleeved with the sealing ring B in the radial direction. The sealing ring B always has the movement trend of hooping the sealing ring C, the inner wall of the sealing ring C is in sealing fit with the outer wall of the valve rod, the sealing performance is good, gas is not prone to leakage, the valve rod response speed is high, and the service life is long.

The invention provides a rear cover auxiliary material of electronic equipment and a preparation method thereof, the electronic equipment and a rear cover assembly of the electronic equipment, and the rear cover auxiliary material of the electronic equipment comprises a zeolite porous layer and a viscoelastic high polymer material barrier layer from inside to outside, the zeolite porous layer comprises a viscoelastic high polymer material matrix and zeolite particles dispersed in the viscoelastic high polymer material matrix, and the zeolite porous layer contains fiber pores. According to the auxiliary material combination for the rear cover of the electronic equipment, the viscoelastic high polymer material and the zeolite particles are used and arranged in the gap between the rear cover of the electronic equipment and the base body of the electronic equipment, a good vibration reduction effect is achieved, shell vibration of the electronic equipment is almost eliminated, and the acoustic low-frequency performance is improved to a certain extent.

The present invention discloses an assembled floating unit plate and an assembly connection construction method, including a plurality of floating plate unit blocks and a connection structure. The plurality of floating plate unit blocks are arranged in sequence along the extension direction of the track line. The connection structure is arranged between adjacent floating plate unit blocks, so as to connect the plurality of floating plate unit blocks to form a linear floating unit plate extending along a straight line, or to connect the plurality of floating plate unit blocks to form a curved floating unit plate with a curved curvature. Compared with the common prefabricated floating plate in the prior art, the floating unit plate of the present invention is not limited by the construction space and transportation and hoisting, and can be transported and hoisted more conveniently and labor-savingly; it can be connected to form a floating unit plate of any length according to the actual length of the track line, and has a very high flexibility in use, a stable and firm floating unit plate structure, no connection gap between adjacent floating plate unit blocks, very high driving safety, and a very good vibration reduction effect.