59 results about "Damping capacity" patented technology

The invention relates to the technical field of floating fans, in particular to a parameter tuning method suitable for a multi-tuned mass damper of a floating fan, which sequentially comprises the following steps of: establishing a system dynamics model; defining an optimization variable and a constraint range; constructing a comprehensive fitness function; initializing a grey wolf population and algorithm parameters; executing a grey wolf position optimization updating mechanism; setting convergence judgment conditions; and outputting the optimal TMD parameter combination. According to the method, structural dynamic characteristics and an intelligent algorithm strategy are fully fused, particularly, spatial arrangement coordinates of the TMD are brought into an optimization variable domain, collaborative design of tuning parameters and arrangement space is achieved, the method is different from a single-parameter or fixed-point optimization mode, the limitation of artificial experience layout is avoided, overall suppression of structural multi-order modal response is achieved, and the method is suitable for large-scale popularization and application. The damping capacity and the stability margin of the fan structure under wind wave flow coupling excitation are improved, cross-modal and multi-source vibration cooperative treatment is achieved on the system response coordination and control strategy level, and the method has the adaptability to offshore wind power scenes.

This invention relates to the field of damping and vibration reduction technology, and discloses a bidirectional self-resetting TMD energy dissipation device, including a connecting plate, a load mechanism, and a damping energy dissipation component disposed between the load mechanism and the connecting plate. The damping energy dissipation component includes a hinge ball, with deflection rods rotatably connected to both sides of the hinge ball. The other ends of the two sets of deflection rods are rotatably connected to an L-shaped support plate fixed to the bottom of the connecting plate. This invention overcomes the problems of limited damping and vibration reduction energy dissipation direction and low damping efficiency in traditional dampers. By employing a multi-set distributed design, it can decompose the damping deflection, improve damping capacity and recovery capacity, enhance building stability and safety, facilitate installation and maintenance, achieve damping and energy dissipation in multiple directions, and facilitate counterweight addition and removal operations, making it suitable for different building vibration reduction needs.

The application belongs to the technical field of rail transit damping fasteners, and particularly relates to an air spring damping fastener, which comprises an upper iron pad, an air spring isolator, a lower iron pad, an anchoring system and a spring strip pressing system, wherein the air spring isolator is arranged between the upper iron pad and the lower iron pad and forms a sealed air cavity in the air spring isolator, the air spring isolator provides elastic support and damping effect for the steel rail through compression of the air cavity, the air cavity is communicated with the outside through a valve to realize air pressure adjustment, so as to change the elastic properties of the fastener, and the fastener has adaptive supporting and damping capacity under different load conditions. By introducing the air spring isolator as a core elastic element, the fastener can automatically match the reasonable rigidity under different load conditions, and the damping performance and structural safety are considered at the same time, so that the fastener has good damping effect, load adaptive capacity and engineering application value.

The invention belongs to the technical field of mechanical equipment damping, and particularly relates to a damping structure for mechanical equipment, which comprises a damping table, a bottom fixing type buffer mechanism and a surface adjusting type temperature conducting mechanism, the bottom fixing type buffer mechanism comprises a fixed connection assembly, an elastic supporting assembly, an energy absorption assembly and a guide assembly, the fixed connection assembly is arranged on the bottom wall of the damping table, and the elastic supporting assembly is arranged on the bottom wall of the damping table; the elastic supporting assembly is arranged at the bottom of the fixed connection assembly, the energy absorption assembly is arranged at the end, away from the damping table, of the elastic supporting assembly, and the guide assembly is arranged on the bottom wall of the elastic supporting assembly. According to the damping structure for the mechanical equipment, the damping capacity of the damping structure can be monitored in real time, the state of the rubber ring layer in the relatively low-temperature or high-temperature environment is adjusted, and then the damping performance of the damping structure is ensured.

The application provides a bearing assembly for chemical mechanical polishing, comprising a damping module, a driving module and a bearing head; wherein the damping module comprises a spindle with a cavity inside and a first damping unit in the cavity, the first damping unit comprises a core and a plurality of damping blocks arranged on the outer wall of the core, the damping blocks extrude the inner wall of the cavity to absorb the transverse vibration of the spindle. The core is placed in the spindle, which enhances the damping and anti-vibration effect, in addition, the plurality of damping blocks arranged on the outer wall of the core can absorb the transverse excitation generated from the polishing head grinding, the compression resistance of the damping blocks is fully utilized, the original shearing and tensile working state is changed to a compression working state, the transverse damping capacity is increased, and the reset and limiting effects are also exerted.

The application discloses the technical field of optical platform, and particularly provides an optical platform with good vibration isolation effect, which comprises an optical platform body, a vibration isolation device and a load-bearing damping device, the optical platform body is supported and connected through the vibration isolation device and the load-bearing damping device, and the optical platform body can stably place optical equipment, the vibration isolation device is arranged around the bottom of the optical platform body, and the vibration isolation device can isolate vibration of the four corners of the bottom of the optical platform body, the application can isolate the vertical vibration direction of the placing platform, increase the vertical vibration isolation capacity of the placing platform, and isolate the side of the placing platform and increase the damping capacity of the side of the placing platform.

The utility model relates to a novel brick making machine vibration device, the bottom of a vibration mechanism is fixedly connected with a noise reduction protection supporting mechanism, a connecting mechanism is arranged between a vibration operation table and the noise reduction protection supporting mechanism, the noise reduction protection supporting mechanism comprises four fixing columns, four noise reduction baffles are connected among the outer surface walls of the four fixing columns in a sliding mode, and the noise reduction baffles are connected with the vibration operation table. The number of the connecting mechanisms is four, the four connecting mechanisms are connected to the four fixing columns correspondingly, the upper fixing plate is fixedly connected to the bottom wall of the vibration operation table, the upper limiting barrel is fixedly connected to the bottom wall of the upper fixing plate, the lower fixing plate is fixedly connected to the top faces of the fixing columns, and the lower limiting barrel is fixedly connected to the top wall of the lower fixing plate. Two ends of the connecting spring are respectively clamped in the upper limiting barrel and the lower limiting barrel; effective damping capacity is provided through the arranged connecting mechanism according to the elasticity of the connecting mechanism, the outer surface walls of the fixing columns are shielded and sealed through the noise reduction baffles, and the noise transmission effect is effectively reduced.

The invention belongs to the related technical field of structural vibration control, and discloses a variable damper and equipment based on variable pitch thread transmission, the variable damper comprises a magnetic metal shell, and a center driving sliding disc, a variable pitch threaded rod and a peripheral eddy current disc which are respectively arranged in the metal shell, the variable pitch threaded rod is sleeved with the center driving sliding disc, and threaded connection is formed between the center driving sliding disc and the variable pitch threaded rod. The peripheral eddy current disc is connected to the central driving sliding disc; the metal shell can provide a magnetic field; and the thread spacing of the variable-pitch threaded rod is in nonlinear distribution. Forced linear vibration is converted into nonlinear rotation through the variable-pitch threaded rod, geometric amplification of the rotating speed and electromagnetic dissipation power is achieved under limit displacement by means of the thread pitch characteristic that the thread pitch is distributed in a nonlinear mode, powerful anti-top-rushing protection is provided, and the variable-damping capacity with the stroke self-adaption function is achieved.

The utility model relates to the field of magneto-rheological dampers, and discloses a multi-coil magneto-rheological damper which comprises a dust cover, one side of the dust cover is detachably arranged on a cylinder barrel, multiple sets of coils are installed in the cylinder barrel, multiple sets of magnet vanes are arranged between the multiple sets of coils, and multiple sets of magnet vanes are arranged between the multiple sets of coils. A plurality of damping channels are installed in the cylinder barrel, a plurality of sets of damping channels are arranged on one side of the magnetism isolating plate, a left end cover is installed between the dustproof cover and the cylinder barrel, a right end cover is installed on the other side of the cylinder barrel, and a first O-shaped sealing ring is installed on the surface of the right end cover. Through the arrangement of the damping channels and the coils, the damping force during triggering can be conveniently increased through the multiple sets of damping channels arranged through the design, so that the damping effect is improved, grading adjustment is achieved through the multiple sets of coils according to requirements, the reliability of the damping capacity is further improved, and good use prospects are achieved.

The elastically-connected high-damping three-way shock absorber comprises an outer shell (6) and a middle shaft (2), the outer shell (6) is in a barrel shape, the middle shaft (2) is installed at the barrel bottom through an axial supporting mechanism (14), a cylindrical inner shell (10) is embedded in the outer shell (6), the inner shell (10) is connected with the middle shaft (2) through a horizontal connecting piece, and the upper end of the middle shaft (2) penetrates out of the center of an upper end cover (3) of the outer shell (6); the outer shell (6), the inner shell (10) and the middle shaft (2) are of a rigid structure, and the horizontal connecting piece, the upper end cover (3) and the axial supporting mechanism (14) are of an elastic structure. The three-direction vibration reduction capacity is achieved, and axial, radial and torsional vibration energy can be absorbed through the structural design of the upper-layer horizontal connecting piece, the middle-layer horizontal connecting piece and the lower-layer horizontal connecting piece.

The utility model discloses a base structure of a coaxial machine, which belongs to the technical field of coaxial machines, aims to solve the problems of poor adjusting flexibility and insufficient damping capacity, and comprises a support frame, a mounting table and a mounting seat, the mounting seat is fixedly mounted at the top of the mounting table and used for mounting and fixing the coaxial machine, and an adjusting mechanism is arranged in the support frame. The mounting table is arranged on the upper portion of the supporting frame in a lifting adjusting mode through an adjusting mechanism, trundles are fixedly connected to the four corners of the bottom of the supporting frame, an access hole is formed in the front side of the supporting frame in a hinged mode through hinges, a controller is fixedly connected to the surface of the front side of the mounting table, and a buffering mechanism is arranged between the mounting table and the adjusting mechanism. According to the utility model, through the arranged adjusting mechanism, the height of the mounting table can be adjusted, so that the use condition of the coaxial machine can be adjusted according to the use condition, the adaptability and the mounting efficiency of the coaxial machine are improved, and the use convenience of the device is further improved.

The present application relates to parking equipment support damping technical field, proposed multilayer lifting transverse parking equipment damping device, support and support piece connection, support piece has accommodating space for placing a plurality of damping unit. Damping unit includes: upper cover, lower cover and elastic piece. Upper cover, support piece, support are connected in turn, lower cover is arranged on the building and is arranged in the support piece, and a cavity is formed between the upper cover and the lower cover for placing the elastic piece. The two ends of the elastic piece act on the upper cover and the lower cover respectively. When the building with embedded shock absorber is damaged by earthquake, cracking and other major disasters, the support piece is supported first, and the damping unit starts to work when the support piece is deformed. In this way, the problem that the shock absorber loses damping capacity when the embedded building has a large damage vibration is effectively solved.

The invention discloses an aerostatic bearing for an aluminum alloy melt rotary blowing degasser, the aerostatic bearing is mounted on a shaft, an inert gas input hole is formed in the shaft, the aerostatic bearing comprises a bearing inner body and a bearing outer body, the bearing outer body is provided with an air inlet and an annular air cavity, and the air inlet is communicated with the annular air cavity. A plurality of throttling holes communicated with the annular air cavity, an air storage cavity and a plurality of damping holes are formed in the bearing inner body; the two ends of each throttling hole are communicated with the air cavity and the damping hole respectively, each damping hole is communicated with the air storage cavity, and the air storage cavity is located on the bearing working face. When the aerostatic bearing is subjected to external impact and vibrates, the extrusion film effect of air in the air storage cavity plays a role of an air spring, and the damping capacity of the aerostatic bearing is effectively improved in combination with friction damping of the multiple damping holes; the combined action of the air spring action of the air storage cavity and the friction damping action of the damping hole can increase the loading capacity, and the device can adapt to the working environment with the large load of the molten aluminum rotary injection machine.

The application provides a broadband inertia enhanced vibration isolator and a novel damping track, wherein the broadband inertia enhanced vibration isolator comprises an outer cylinder, a spring, a granular damping inertia container and an inner cylinder, the spring is arranged in the inner cylinder, and the granular damping inertia container is sleeved in the spring; the granular damping inertia container comprises a ball screw pair, a flywheel containing granular substances and a base, the flywheel is coaxially fixedly connected with the ball screw pair at a nut of the ball screw pair; a first end of the ball screw pair is fixedly connected on the outer cylinder, and a second end is connected in the base and can rotate around an axis. The broadband inertia enhanced vibration isolator provided by the application is composed of an outer cylinder, a spring, an inner cylinder and other components, the granular damping inertia container in the broadband inertia enhanced vibration isolator is both an inertia container and a granular damper, and is applied to a track, so that the comprehensive damping capacity of a spring floating slab track in a full frequency band can be effectively improved.

The invention provides a doubly-fed fan rotor side converter current loop LADRC parameter setting method and device. The method comprises the steps that control gain parameters of a doubly-fed fan rotor side converter current loop LADRC are acquired; increasing the bandwidth of the linear expansion state observer and the bandwidth of the controller in proportion until the noise causes the output fluctuation or oscillation of the system; finely adjusting the bandwidth of the linear expansion state observer and the bandwidth of the controller; finely adjusting the proportional gain parameter and the second linear parameter until the closed-loop dynamic performance of the system reaches the expected dynamic performance, and recording an undetermined parameter set under the current control gain parameter; after the control gain parameter is changed, the steps are repeated to obtain multiple sets of undetermined parameters; and LADRC parameters meeting the requirements are selected according to a preset standard. The parameter setting method is simple and easy to implement, gives full play to the immunity and damping capacity of LADRC, and is superior to an existing additional damping control strategy.

The invention provides a vibration reduction structure, a loudspeaker module and a terminal, the vibration reduction structure comprises a bushing, an elastic member and a restraint member, and the bushing is used for being fixedly connected with a mounting rack. The elastic piece is arranged on the periphery of the lining in a sleeving mode, the elastic piece is provided with a connecting groove, the connecting groove is recessed from the peripheral face of the elastic piece, and the connecting groove surrounds the periphery of the elastic piece and is used for being connected with a loudspeaker cover. The restraining piece is embedded in the elastic piece and surrounds the lining, and the strength of the restraining piece is larger than that of the elastic piece. According to the embodiment of the invention, the vibration reduction capability of the vibration reduction structure can be optimized, and the vibration of the loudspeaker can be prevented from driving the mounting structure to vibrate or resonate with other structures of the terminal.

The utility model discloses a kind of switch machine support shock-absorbing seats. It includes the support assembly as bottom support and the shock-absorbing assembly cooperation installation with support assembly, shock-absorbing assembly includes the upper top cover with the accommodating cavity, the main shaft fixedly installed with upper top cover and the lower top cover of accommodating cavity opening end in upper top cover, the lower end of main shaft is inserted into accommodating cavity and is sleeved with the elastic element pressed on the lower top cover upper end surface to make the elastic floating structure between upper top cover and lower top cover, support assembly is cooperation installation with lower top cover and as bottom support. Advantage is: ingeniously utilize the shock absorption of elastic element and the support adjustable structure of support assembly, the elasticity of shock-absorbing assembly is not changed by the change of support height, after installation is completed, shock-absorbing assembly part and support assembly are flexibly connected, reduce the influence of support vibration to support assembly, compared with traditional switch machine support shock-absorbing seat, damping capacity is more stable and reliable.

The utility model relates to the technical field of vibration reduction isolators, in particular to a metal very-low-frequency vibration reduction isolator which comprises an equipment shell, the lower surface of the equipment shell abuts against the upper surface of an upper clamping plate, a large bolt is arranged between the equipment shell and the upper clamping plate in a sleeved mode, the bottom of the large bolt is in threaded connection with a nut, and an anti-loosening assembly is arranged on the lower side of the nut. A lower clamping plate is arranged on the lower side of the upper clamping plate, the lower surface of the lower clamping plate is fixedly connected with the upper surface of the positioning steel base plate, a large steel wire rope spring is fixedly sleeved between the upper clamping plate and the lower clamping plate, and small steel wire rope springs are fixedly installed on the two sides of the large steel wire rope spring. Through the arrangement of the anti-loosening assembly, the cooperation of the steel wire rope spring and the detachable connection design of the supporting block and the small steel wire rope spring, the nut is effectively prevented from rotating, stable and reliable connection is ensured, meanwhile, the multidirectional damping capacity is enhanced, the supporting direction is optimized, the low-frequency vibration isolation performance and the overall stability of equipment are improved, and the device adapts to complex vibration working conditions.

The utility model discloses a kind of spherical shock absorbers, the spherical shock absorber includes: main body, connecting piece and reinforcing part, connecting piece is set to the both ends of main body, reinforcing part is set to the inside of main body;Main body is set to hollow spherical structure, the top and bottom ends of main body along the direction of its axis are respectively provided with connecting end face;Connecting piece is respectively set to the connecting end face at the top and bottom ends of main body;Reinforcing part is set to annular structure, based on this, reinforcing part is embedded to the inner wall surface of main body, and the top and bottom ends of reinforcing part are respectively matched with the inside of two connecting end faces;Then, connecting piece is embedded to corresponding connecting end face and is matched and connected to the corresponding end of reinforcing part.The spherical shock absorber of the utility model can effectively reduce volume under the condition of guaranteeing damping capacity, so that it is more conducive to narrow application scene, and provides excellent damping performance.

The invention provides an external reactor module supporting structure of a transformer. The external reactor module supporting structure comprises a first support and a second support, a plurality of reactor module units are arranged between the second support and the first support; the end plates are arranged on the two sides of the reactor module units, buffer grooves are formed in the end plates, and buffer gaskets are arranged in the buffer grooves; the elastic gasket comprises a supporting beam and extending edges arranged on the two sides of the supporting beam, a supporting groove is formed in the middle of the supporting beam, and the top of the supporting beam makes contact with the buffer gasket; through the arrangement of the buffer gasket and the buffer assembly, vibration stress can be effectively absorbed, the damping capacity of the reactor module unit during operation is improved, through the arrangement of the adjusting assembly, fine adjustment of the height of the reactor module unit can be achieved, and installation and follow-up maintenance operation are improved.

The invention discloses a four-steering-wheel driving type AMR chassis which comprises a low chassis body, four sets of steering wheel assemblies symmetrically arranged at the four corners and a plurality of electrical bins arranged in the length direction. The steering wheel assembly is integrated with a suspension damping device, the driving wheels are allowed to vertically move relative to the chassis body, and the chassis is endowed with good obstacle crossing and damping capacity. The chassis body is of a reinforced structure and is good in rigidity and high in bearing capacity. And the electrical bin body adopts a partition isolation and convection heat dissipation design. The AMR chassis solves the problems that an existing AMR chassis is poor in trafficability, high in structure, small in space and insufficient in bearing stability, and is particularly suitable for industrial carrying scenes with high requirements.

The application belongs to the technical field of rail vehicles, and particularly relates to a rubber damping type sequence damping bogie and a rail train. The rubber damping type sequence damping bogie comprises a frame, a damping assembly, a bolster and a wheel set group. The damping assembly comprises an upper rubber damping mechanism and a lower rubber damping mechanism. The bolster is connected with the upper part of the frame through the upper rubber damping mechanism. The wheel set group is connected with the lower part of the frame through the lower rubber damping mechanism. The upper rubber damping mechanism and the lower rubber damping mechanism form a two-stage series rubber damping path. The two-stage series rubber damping mechanism is arranged in series, so that the vibration energy experiences two independent damping dissipation processes in the transmission path. The total damping capacity is significantly higher than that of a single rubber spring scheme, and the technical defect of insufficient damping of the single rubber damping is solved.

The invention belongs to the technical field of bridge shock resistance, and particularly provides a self-resetting device for bridge shock absorption, a bridge and a mounting method, the device adopts a connecting piece to connect a first backstop and a second mounting seat to form a plane frame structure, the stress performance is better, the impact force is effectively shared, the anti-impact capability and the limiting capability of the device are improved, and the service life of the device is prolonged. The damper consumes energy in the moving process of the second backstop, the reset spring can provide reset force and can also achieve the buffering effect, the contact time of the main beam and the bridge pier is prolonged, the impact force of the main beam on the bridge pier is reduced, the requirement for the vertical height of the first installation base, the second installation base and the third backstop is small, and other components are each of an axial extending structure. According to the device, the functions of energy dissipation, limiting, resetting and buffering are well integrated, the anti-seismic and damping capacity of a bridge is effectively improved, and the device is particularly suitable for application scenes where the space between simply supported beams and other pier beams is narrow.

The utility model discloses a training protective pad with flame -retardant solid silica gel foam, including two protective pad main parts, the top of two protective pad main parts corresponds and is sleeved with two outer package flame -retardant layers of integral connection, be equipped with flame -retardant foam board between protective pad main part and outer package flame -retardant layer. The utility model, through being equipped with outer package flame -retardant layer, cooperate flame -retardant foam board, play the role of elasticity and flame -retardant protection, and the crack of support storage box body and protective pad main part is equipped with shock -absorbing protection subassembly, plays the role of elastic shock absorption and buffering damping, and the both sides of support storage box body and protective pad main part are integrally equipped with storage hanging buckle subassembly, plays the role of hanging and fixed, makes protective pad main part retractable and be stored in support storage box body, and two support storage box bodies are spliced and folded, makes the device to the fireproof protection performance of protective pad excellent, and gives consideration to structural formula shock -absorbing damping capacity and easy folding storage capacity, and the practicability and convenience are excellent.

The invention relates to a metal rubber and cantilever beam oscillator local resonance composite sandwich structure which comprises an array multi-cell structure composed of a plurality of local resonance composite sandwich unit cell structures. The local resonance composite interlayer unit cell structure comprises an upper plate, an amplitude adjusting pad, a cross-shaped cantilever beam, conical shell-shaped metal rubber and a lower plate which are sequentially arranged from top to bottom in the Z-axis direction, a local oscillator is arranged at the lower end of the cross-shaped cantilever beam, and the upper plate, the amplitude adjusting pad, the cross-shaped cantilever beam and the conical shell-shaped metal rubber are connected through positioning pieces. And the conical shell-shaped metal rubber is connected with the lower plate through a clamping ring. The vibration damper is simple in structure and reasonable in design, has the vibration damping capacity of low-frequency efficient suppression and wide-frequency-domain strong attenuation synergistic enhancement, has the extreme environment adaptability of wide temperature range, corrosion resistance and fatigue resistance, is high in reliability, has the flexible regulation and control capacity of independent and adjustable multi-performance parameters and customizable design, and is suitable for large-scale popularization and application. The method has the engineering advantages of process standardization, high assembly consistency and high expandability.

The utility model discloses a transistor storage device, which relates to the field of semiconductor storage devices, and is characterized in that the transistor storage device comprises a box body and a box cover which can be opened and closed mutually, the box body comprises a containing cavity with an opening in the top, the side wall of the containing cavity is provided with an inclined bearing part inclined from the opening to the center of the bottom, and a storage rack is arranged in the containing cavity. The peripheral side of the storage rack is provided with an inclined contact part matched with the inclined bearing part, a first elastic buffer layer is arranged between the inclined bearing part and the inclined contact part, a cavity is formed between the bottom of the storage rack and the bottom of the containing cavity, a plurality of storage grooves are formed in the storage rack, and a plurality of transistors can be stored in each storage groove side by side. The storage grooves comprise transistor body containing grooves and transistor pin containing grooves, and fixing assemblies used for fixing transistors stored side by side are arranged in the storage grooves in the storage rack. The utility model has the advantages of good buffering and damping capability and high transistor storage stability.

To provide a resonance frequency tracking circuit and a resonance frequency tracking method of a vibrator capable of stably tracking a resonance frequency by automatically correcting a damping capacity.SOLUTION: A resonance frequency tracking circuit of a vibrator includes a capacitance correction circuit of a damping capacitor (C0), and the capacitance correction circuit is configured to connect a voltage signal (Vf) of the vibrator to an input of a differentiation circuit, connect an output of the differentiation circuit to an input of a variable gain circuit, and subtract an output of the variable gain circuit from a current signal (If), and controls a correction amount of the damping capacitor (C0) by controlling a gain of the variable gain circuit to bring a selected anti-resonance frequency or the like (fa ") close to a target frequency (fCAL) and reduce an influence of the damping capacitor (C0).SELECTED DRAWING: Figure 5

The invention relates to the technical field of waterproof casing pipes, and discloses a self-tightening closed casing pipe structure and a construction method thereof.The self-tightening closed casing pipe structure comprises a water pipeline and two end casing pipes, inner rings of the end casing pipes are matched with the outer diameter of the water pipeline, the two end casing pipes are arranged on the inner side and the outer side of the pool wall of a pool, and end sleeves are arranged on the inner sides of the two end casing pipes; an adjusting sleeve is arranged between the two groups of end sleeves, and two ends of the adjusting sleeve are respectively in threaded connection with the two groups of end sleeves; according to the self-tightening closed casing pipe structure and the construction method thereof, through the casing pipe structure composed of the end casing pipe, the end sleeve, the adjusting casing pipe, the inflatable sealing ring, the heat preservation gasket, the asphalt cement filler and the like, the casing pipe can be standardized and normalized, the construction difficulty is greatly reduced, large-area digging of concrete and cutting of steel bars are not needed, and damage to an original structure is reduced; and the self-compaction performance is good, a larger displacement space can be provided for deformation of the pipeline, and the better vibration buffering capacity is achieved for the pipeline connected with vibration equipment.

The application discloses to the technical field of anti-vibration hammer, and is a kind of anti-vibration hammer with liquid damping device, including the wire clamp device being installed on optical cable, and the damping mechanism being fixed in the lower end of wire clamp device;Wire clamp device includes the upper wire clamp being connected with optical cable and the lower wire clamp being located below upper wire clamp, and the upper wire clamp is connected with lower wire clamp by buffer mechanism;Damping mechanism includes horizontal fixed on lower wire clamp crossbar, and one end of crossbar is equipped with big hammer, and the other end of crossbar is equipped with small hammer, and the lower of big hammer and small hammer is hung with metal ball.The application can effectively improve the damping capacity of anti-vibration hammer according to the actual situation of each place.

The application discloses a hydraulic and pneumatic damping hub, a wheel and an automobile, relates to the technical field of automobile parts, and solves the problems of weak damping capacity and low damping sensitivity of the existing force-damping wheel, improves the damping effect, and specifically has the following arrangement: a hub inner ring and a hub outer ring connected through a plurality of damping connecting rods, two oppositely arranged support plates fixed on the middle position of the inner side surface of the hub outer ring along the ring direction, a plurality of support rods with ball ends uniformly distributed on the outer side surface of the hub inner ring, the support rods located between the two support plates, the plurality of damping connecting rods divided into two groups, the two groups of damping connecting rods obliquely arranged on the two sides of the support plates, one end of the damping connecting rod hinged to the inner surface of the hub outer ring, the other end hinged to the outer surface of the hub inner ring, and one hydraulic and pneumatic shock absorber hinged to each damping connecting rod.