CN215444870U

CN215444870U - Shape memory alloy damping gasket

Info

Publication number: CN215444870U
Application number: CN202120307686.4U
Authority: CN
Inventors: 王红娟; 史芳杰; 沙军; 张德科; 李向林; 李兴楠; 申光; 杜志强; 聂永胜
Original assignee: Lanzhou Guojia Memory Alloy Co ltd
Current assignee: Lanzhou Guojia Memory Alloy Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-01-07
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to the technical field of damping gaskets, in particular to a shape memory alloy damping gasket, which comprises a pressing part and a supporting part, wherein the pressing part is arranged at the upper part of an inner hole of the gasket, the supporting part is arranged at the outer side of the lower part of the gasket, a height difference exists between the pressing part and the supporting part, the pressing part is arranged above the supporting part, an anti-slip groove is arranged between the pressing part and the supporting part, the anti-slip groove is arranged on the top surface of the gasket, a plurality of anti-slip grooves are arranged, and the inner hole centers of the plurality of anti-slip grooves are circumferentially and uniformly distributed by taking the shaft as the center; simple preparation, stable mechanical property, long service life, and difficult loss of elasticity and plastic deformation caused by high temperature.

Description

Shape memory alloy damping gasket

Technical Field

The utility model relates to the technical field of damping gaskets, in particular to a shape memory alloy damping gasket.

Background

The fastener is widely applied to places needing fastening connection, such as mechanical equipment, vehicles, ships, railways, bridges, buildings and the like, and is mainly used as a mechanical foundation part for fastening connection and is most widely applied. In systems such as bridges, buildings, railways, precision machines and equipment, due to the existence of external or internal power sources, the systems can generate vibration of different degrees, the stability of the systems can be influenced mostly by the vibration, or the looseness of fasteners is caused by the vibration, so that potential safety hazards and economic loss are caused.

The damping gasket is a common device for reducing vibration and noise and preventing the looseness of a fastener, but the damping gasket in the prior art has high design difficulty, difficult manufacture and environmental pollution, and general use effect, the NiTi shape memory alloy has good shape memory effect and superelasticity, and the superelasticity refers to the phenomenon that the shape memory alloy in a parent phase state generates strain far larger than the elastic limit strain amount under the action of external force, and the strain can be automatically recovered after unloading. The NiTi alloy in the super-elastic state has the characteristics of good elasticity, high damping, high specific strength, wear resistance, corrosion resistance, excellent biocompatibility and the like, and is gradually applied to buildings, bridges, marine structures, machinery, equipment and medical instruments. If the NiTi shape memory alloy is used for manufacturing the damping gasket, the superelasticity characteristic of the shape memory alloy is utilized, and when the NiTi shape memory alloy is used as a fastening connecting piece and matched with a bolt and a nut, the NiTi shape memory alloy not only has the fastening and anti-loosening effect, but also can slow down or absorb the vibration of the fastening piece caused by the influence of an external or internal power source, and plays a role in damping and absorbing, so that the instability of a system or the occurrence of safety accidents caused by the vibration are reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a shape memory alloy damping gasket, which utilizes the superelasticity characteristic of shape memory alloy to slow down and absorb the vibration of a fastener caused by the influence of an external or internal power source, prevents the fastener from loosening, plays a role in damping and shock absorption, and reduces the instability and safety accidents of a system caused by the vibration.

In order to solve the technical problem, the shape memory alloy damping gasket is provided with an inner hole, is in a butterfly gasket structure and comprises a pressing portion and a supporting portion, the pressing portion is arranged at the upper portion of the inner hole of the gasket, the supporting portion is arranged on the outer side of the lower portion of the gasket, a height difference exists between the pressing portion and the supporting portion, the pressing portion is arranged above the supporting portion, an anti-skid groove is formed between the pressing portion and the supporting portion, the anti-skid groove is formed in the top surface of the gasket, the number of the anti-skid grooves is multiple, and the anti-skid grooves are uniformly distributed around the inner hole center as an axis.

Furthermore, the anti-skidding groove be a style of calligraphy anti-skidding groove, the anti-skidding groove has the gasket center to outwards disperse.

Furthermore, the anti-skid grooves are straight anti-skid grooves which are obliquely distributed from the inner hole to the outside in a counterclockwise direction.

Furthermore, the anti-skid grooves are straight anti-skid grooves which are obliquely distributed clockwise from the inner hole to the outside.

Furthermore, the anti-skid grooves are arc-shaped grooves and are obliquely distributed from the inner hole to the outside in an anticlockwise direction.

Furthermore, the anti-skid grooves are arc-shaped grooves and are obliquely distributed clockwise from the inner hole to the outside.

Furthermore, the gasket is made of NiTi shape memory alloy.

Further, the cross-sectional shape of the gasket is circular or polygonal.

Furthermore, the diameter of the inner hole of the gasket is 5mm-20 mm; the outer diameter of the gasket is 8mm-100 mm; the thickness of the gasket is 0.5mm-5 mm; the height of the gasket is 2mm-20 mm.

The utility model has the beneficial effects that:

1. the material of the utility model is NiTi shape memory alloy, which has elasticity, after the superelastic damping gasket is matched and installed with the bolt, the nut and the flat gasket, the superelastic damping gasket is in a superelasticity state due to deformation, and when the superelastic damping gasket has high damping characteristic and vibrates outside or inside a system, the partial vibration transmitted between the connected parts can be slowed down or absorbed, so that the damping effect is achieved, and the influence of the vibration on the system is reduced; the gasket in the super-elastic state can also provide continuous positive pressure, so that the friction force between connected parts is increased, the reliability of fastening the connecting parts is improved, and the occurrence of major accidents and economic loss caused by major accidents due to the loosening of the fastening connecting parts are avoided;

2. the anti-slip groove is arranged, so that the friction force between the anti-slip groove and the connected piece is increased, and the anti-slip effect is achieved;

3. compared with the common spring washer, the spring washer has the advantages that the spring washer is good in elasticity, high in strength, wear-resistant and corrosion-resistant, and does not need surface electroplating corrosion-resistant coating treatment during production, so that the processing procedure is simplified, the cost is saved, and the environmental pollution is avoided;

4. simple preparation, stable mechanical property, long service life, and difficult loss of elasticity and plastic deformation caused by high temperature.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a third embodiment of the present invention;

FIG. 4 is a diagram illustrating a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fifth embodiment of the present invention;

FIG. 6 is a diagram illustrating the elasticity of the shape memory alloy according to the present invention;

FIG. 7 is a schematic view of the present invention in a free state during installation;

fig. 8 is a schematic structural view of the restraint state after the installation of the present invention.

In the figure: 1. a pressing part; 2. a support portion; 3. and (4) an anti-slip groove.

Detailed Description

As shown in figure 1, the shape memory alloy damping gasket is provided with an inner hole, is of a butterfly gasket structure and comprises a pressing portion 1 and a supporting portion 2, the pressing portion 1 is arranged on the upper portion of the inner hole of the gasket, the supporting portion 2 is arranged on the outer side of the lower portion of the gasket, a height difference exists between the pressing portion 1 and the supporting portion 2, the pressing portion 1 is arranged above the supporting portion 2, an anti-skid groove 3 is arranged between the pressing portion 1 and the supporting portion 2, the anti-skid groove 3 is arranged on the top surface of the gasket, the anti-skid grooves 3 are arranged in a plurality, and the anti-skid grooves 3 are uniformly distributed around the inner hole center as an axis. The anti-skidding groove 3 is a straight-line-shaped anti-skidding groove, and the anti-skidding groove 3 is provided with a gasket which is outwards dispersed in the center. The gasket is made of NiTi shape memory alloy. The cross section of the gasket is circular or polygonal, in the embodiment. The diameter of the inner hole of the gasket is 5mm-20 mm; the outer diameter of the gasket is 8mm-100 mm; the thickness of the gasket is 0.5mm-5 mm; the height of the gasket is 2mm-20 mm.

As shown in fig. 2, the second embodiment of the present invention is different from the first embodiment in that the anti-slip groove 3 is a straight-line-shaped anti-slip groove, and the anti-slip grooves 3 are obliquely distributed from the inner hole to the outside counterclockwise.

As shown in fig. 3, in the third embodiment of the present invention, the anti-slip groove 3 is a straight-line-shaped anti-slip groove, and the anti-slip groove 3 is obliquely distributed clockwise from the inner hole.

As shown in fig. 4, in the fourth embodiment of the present invention, the anti-slip groove 3 is an arc-shaped groove, and the anti-slip groove 3 is obliquely distributed from the inner hole to the outside in a counterclockwise direction.

As shown in fig. 5, in the fifth embodiment of the present invention, the anti-slip grooves 3 are arc-shaped grooves, and the anti-slip grooves 3 are obliquely distributed clockwise from the inner hole.

As shown in FIG. 2, in the loading and unloading process of NiTi shape memory alloy, the stress variation relationship with strain shows nonlinearity and hysteresis cycle effect is generated, so that the NiTi shape memory alloy has stronger energy dissipation property, i.e. high damping property due to superelasticity. By utilizing the characteristic, the superelastic damping gasket is matched with the bolt and the nut to eliminate the height difference between the pressing part and the supporting part, the deformation induces the martensite phase transformation to enable the martensite phase transformation to be in a superelasticity state, and when the connected piece vibrates, the vibration is slowed down or even eliminated by utilizing the high damping characteristic, so that the damping effect is achieved. Furthermore, the super-elastic damping gasket which is in a super-elastic state due to installation deformation can continuously output positive pressure in the height direction, so that the friction force between connected pieces is increased, the reliability of fastening the connected pieces is ensured, and the fastening and anti-loosening effects are achieved.

As shown in fig. 7 and 8, the present invention can be mounted by pressing the flat washer against the bolt, nut, and flat washer when in use.

The utility model is used for vehicle shock absorption and noise reduction. Vibrations generated during the running of the vehicle are mainly caused by excitation of the road surface, and the excitation is transmitted to the vehicle body through a suspension system, so that the running comfort is influenced, and noise is generated in the vehicle. The superelastic damping shim is mounted on the suspension system and the seat fixing bolt, and has high damping characteristic, so that part of vibration generated by road excitation can be reduced or eliminated, the noise in the vehicle caused by the vibration is reduced, and the driving comfort is improved. The super-elastic damping gasket is arranged on a fastening bolt of a vehicle body suspension system, and has super elasticity which can continuously output positive pressure, so that the fastening connection reliability of the bolt is ensured, and safety accidents are prevented.

The utility model is used for fastening connection parts of bridges, railways, buildings and the like. External vibration has great influence on the engineering, and serious safety accidents can be caused in serious conditions. The superelastic damping gasket is installed at the fastening connection part of the engineering, so that vibration transmission between connected pieces can be slowed down or absorbed, the stability of the engineering system is ensured to a certain extent, the fastening connection piece can be prevented from loosening, the reliability of fastening connection is ensured, and safety accidents are prevented.

Claims

1. A shape memory alloy damping shim is characterized in that: the gasket is equipped with the hole, the gasket form is butterfly gasket structure, including exerting pressure portion (1) and supporting part (2), the portion of exerting pressure (1) is established on gasket hole upper portion, the outside in gasket lower part is established in supporting part (2), there is the difference in height between the portion of exerting pressure (1) and supporting part (2), the portion of exerting pressure (1) is established in supporting part (2) top, be equipped with antiskid groove (3) between the portion of exerting pressure (1) and supporting part (2), antiskid groove (3) are established on the gasket top surface, antiskid groove (3) are equipped with a plurality ofly, interior hole center is axle circumference equipartition in a plurality of antiskid grooves (3).

2. The shape memory alloy damping shim of claim 1, wherein: the anti-skidding groove (3) is a straight-line-shaped anti-skidding groove, and the anti-skidding groove (3) is provided with a gasket which is outwards dispersed in the center.

3. The shape memory alloy damping shim of claim 1, wherein: the anti-skidding grooves (3) are straight anti-skidding grooves, and the anti-skidding grooves (3) are obliquely distributed from the inner hole to the outside in an anticlockwise direction.

4. The shape memory alloy damping shim of claim 1, wherein: the anti-skid grooves (3) are straight anti-skid grooves, and the anti-skid grooves (3) are obliquely distributed clockwise from the inner hole to the outside.

5. The shape memory alloy damping shim of claim 1, wherein: the anti-skidding grooves (3) are arc-shaped grooves, and the anti-skidding grooves (3) are obliquely distributed from the inner hole to the outside in an anticlockwise direction.

6. The shape memory alloy damping shim of claim 1, wherein: the anti-skid grooves (3) are arc-shaped grooves, and the anti-skid grooves (3) are obliquely distributed clockwise from the inner hole to the outside.

7. The shape memory alloy damping shim of any one of claims 1 to 6, wherein: the gasket is made of NiTi shape memory alloy.

8. The shape memory alloy damping shim of any one of claims 1 to 6, wherein: the cross section of the gasket is circular or polygonal.

9. The shape memory alloy damping shim of any one of claims 1 to 6, wherein: the diameter of the inner hole of the gasket is 5mm-20 mm; the outer diameter of the gasket is 8mm-100 mm; the thickness of the gasket is 0.5mm-5 mm; the height of the gasket is 2mm-20 mm.