CN210769955U - Shape memory alloy vibration isolator - Google Patents

Abstract

The utility model discloses a shape memory alloy vibration isolator, which relates to the technical field of vibration isolation, comprising an upper connecting plate, a lower connecting plate and a plurality of shape memory alloy ropes. All are arranged between the upper connecting plate and the lower connecting plate. Each shape memory alloy rope is connected with the upper connecting plate and the lower connecting plate. The lower connecting plate is used for fixing with the base. Shape memory alloy rope, the shape memory alloy rope has hysteresis characteristics, its own structure has high stiffness and high damping characteristics, and the low frequency vibration isolation is realized through the bending energy dissipation of the shape memory alloy rope. The shape memory alloy vibration isolator provided by the utility model not only meets the rigidity requirement, but also contains high damping, is not restricted by the working environment, has a simple structure, is convenient to install and has high stability.

Description

A shape memory alloy vibration isolator

technical field

The utility model relates to the technical field of vibration isolation, in particular to a shape memory alloy vibration isolator.

Background technique

倍时，不但不再起到隔振的效果，还会使振动的传递率增加。人们使用以橡胶等材料设计制作弹性、阻尼一体的隔振元件，虽然阻尼大，但是承载能力弱，对环境要求严格。Due to the development of high-tech technologies such as national defense, aerospace, information, and medical technology, the demand for precision machining, ultra-precision machining and other technologies has increased sharply, and precision instruments and equipment are extremely sensitive to the impact of vibration in the working environment. Any tiny vibration may seriously affect Measurement accuracy, machining accuracy, and long-term vibration interference damage to the precision instrument itself are immeasurable. Therefore, in order to ensure the pursuit of high quality, high reliability and high performance of products, and at the same time to protect precision instruments, effective vibration isolation measures must be taken to improve the vibration isolation effect and obtain a good working environment. The lower the natural frequency of the vibration isolation system, the better the vibration isolation effect. The industry has been pursuing low frequency or ultra-low frequency vibration isolation components. At present, low-frequency vibration isolation is mainly achieved through passive vibration isolation, active and semi-active vibration isolation technologies. Active and semi-active vibration isolation technologies require external input energy and the system structure is relatively complex. Traditional passive vibration isolators mainly use metal springs and dampers in parallel as the main vibration isolation units. Metal springs have strong bearing capacity and are designed to meet various stiffness requirements. Nei's weakness, damper's weakness is when the vibration frequency is greater than the natural frequency of the system

When it is doubled, it will not only no longer have the effect of vibration isolation, but also increase the transmission rate of vibration. People use rubber and other materials to design and manufacture vibration isolation elements that integrate elasticity and damping. Although the damping is large, the bearing capacity is weak and the environmental requirements are strict.

It can be seen that the existing low-frequency vibration isolators mainly use metal springs or rubber as elastic units. Although metal springs have high rigidity and strong bearing capacity, they are generally large in size and have almost no damping. Although rubber itself contains certain damping, it can carry Weak ability, limited by the working environment makes the space for play limited. Therefore, designing a vibration isolator that not only meets the stiffness requirements but also contains high damping has good application prospects.

Utility model content

In order to solve the above technical problems, the utility model provides a shape memory alloy vibration isolator, which not only meets the rigidity requirements, but also contains high damping, is not restricted by the working environment, has a simple structure, is convenient to install, and has high stability.

For achieving the above object, the utility model provides the following scheme:

The utility model provides a shape memory alloy vibration isolator, comprising an upper connecting plate, a lower connecting plate and a plurality of shape memory alloy ropes, wherein the upper connecting plate is arranged above the lower connecting plate, and each shape memory alloy rope All are arranged between the upper connecting plate and the lower connecting plate, each of the shape memory alloy ropes is connected with the upper connecting plate and the lower connecting plate, and the lower connecting plate is used for fixing with the base.

Preferably, both the upper connecting plate and the lower connecting plate are arranged horizontally, the upper connecting plate has a plurality of first through holes arranged horizontally, and the lower connecting plate has a plurality of second through holes arranged horizontally. The first through hole corresponds to the second through hole one-to-one, one of the shape memory alloy ropes passes through one of the first through holes, and the two ends extending from the first through hole pass through respectively. Two ends of one of the second through holes extend into the inside of the second through hole, two ends of the shape memory alloy rope are fixedly connected to the lower connecting plate, and the shape memory alloy rope is connected to the first through hole. Both the hole and the second through hole are in an interference fit.

Preferably, it also includes a plurality of fixing bolts, two countersunk holes are provided above each of the second through holes, and one fixing bolt is installed in each of the countersunk holes, and the fixing bolts are used to attach the Both ends of the shape memory alloy rope are fixedly connected with the lower connecting plate.

Preferably, a plurality of the first through holes are parallel to each other, a plurality of the second through holes are parallel to each other, and the first through holes and the second through holes are arranged in parallel.

Preferably, it also includes connecting bolts, a middle part of the lower connecting plate is provided with bolt holes, and the connecting bolts pass through the bolt holes to fix the lower connecting plate on the base.

Preferably, the shape memory alloy rope comprises a stainless steel wire bundle, a plurality of nickel-titanium alloy wire layers and a stainless steel wire layer sleeved in sequence from the inside to the outside.

Preferably, the number of the nickel-titanium alloy wire layers is two, and the stainless steel wire bundle includes seven stainless steel wires.

Preferably, both the upper connecting plate and the lower connecting plate are stainless steel plates.

The utility model has achieved the following technical effects with respect to the prior art:

The shape memory alloy vibration isolator provided by the utility model comprises an upper connecting plate, a lower connecting plate and a plurality of shape memory alloy ropes, the upper connecting plate is arranged above the lower connecting plate, and each shape memory alloy rope is arranged on the upper connecting plate and the Between the lower connecting plates, each shape memory alloy rope is connected with the upper connecting plate and the lower connecting plate, the lower connecting plate is used for fixing with the base, and the vibration control object transmits the force to the upper connecting plate and the shape memory alloy rope after the vibration, and the shape memory The alloy rope has hysteresis characteristics, and its own structure has high stiffness and high damping characteristics, and low-frequency vibration isolation is realized through the bending energy dissipation of the shape memory alloy rope. It can be seen that the shape memory alloy vibration isolator in the present utility model achieves high stiffness and high The integrated damping design is more in line with the actual engineering environment and can be put into use better. It has a simple structure, easy installation, small deformation and high stability.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural representation of the shape memory alloy vibration isolator provided by the utility model;

FIG. 2 is a cross-sectional view of the shape memory alloy rope in the utility model.

Reference numeral description: 1. Upper connecting plate; 2. Shape memory alloy rope; 21. Stainless steel wire bundle; 22. Nitinol wire layer; 23. Stainless steel wire layer; 3. Fixing bolt; 4. Bolt hole; 5. lower connecting plate.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The purpose of the utility model is to provide a shape memory alloy vibration isolator, which not only meets the rigidity requirements, but also contains high damping, is not restricted by the working environment, has a simple structure, is convenient to install and has high stability.

In order to make the above objects, features and advantages of the present utility model more clearly understood, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the present embodiment provides a shape memory alloy vibration isolator, which includes an upper connecting plate 1 , a lower connecting plate 5 and a plurality of shape memory alloy ropes 2 , and the upper connecting plate 1 is arranged above the lower connecting plate 5 . Each shape memory alloy rope 2 is arranged between the upper connecting plate 1 and the lower connecting plate 5, each shape memory alloy rope 2 is connected with the upper connecting plate 1 and the lower connecting plate 5, and the lower connecting plate 5 is used for fixing with the base and vibrating. After the control object vibrates, the force is transmitted to the upper connecting plate 1 and the shape memory alloy rope 2. The shape memory alloy rope 2 has hysteresis characteristics, and its own structure has high stiffness and high damping characteristics. The bending energy of the shape memory alloy rope 2 dissipates energy. To achieve low-frequency vibration isolation, it can be seen that the shape memory alloy vibration isolator in this embodiment achieves an integrated design of high stiffness and high damping, and at the same time absorbs the characteristics of the high bearing capacity of the spring vibration isolator and the high damping of the rubber vibration isolator, which is more in line with the The actual engineering environment is not limited by the working environment, and can be put into use better, with simple structure, convenient installation, small deformation and high stability.

Specifically, both the upper connecting plate 1 and the lower connecting plate 5 are arranged horizontally, the upper connecting plate 1 has a plurality of first through holes arranged horizontally, and the lower connecting plate 5 has a plurality of second through holes arranged horizontally. The through holes correspond to the second through holes one by one, and a shape memory alloy rope 2 passes through a first through hole, and the two ends extending from the first through hole respectively extend to the second through hole through the two ends of the second through hole. Inside the hole, both ends of the shape memory alloy rope 2 are fixedly connected with the lower connecting plate 5, and the shape memory alloy rope 2 is an interference fit with the first through hole and the second through hole, thereby ensuring the shape memory alloy rope 2 and the upper connecting plate. There is no relative movement between 1.

In this embodiment, the first through hole and the second through hole are introduced, and the structure of the vibration isolator can be adjusted according to the actual working environment by adjusting the shape memory alloy rope 2 . At the same time, different vibration isolation effects can be achieved by adjusting the quantity of the shape memory alloy ropes 2 .

This embodiment also includes a plurality of fixing bolts 3 , two countersunk holes are provided above each second through hole, and a fixing bolt 3 is installed in each countersunk hole, and the fixing bolts 3 are used to connect the shape memory alloy rope 2 Both ends are fixedly connected with the lower connecting plate 5 .

In this embodiment, the plurality of first through holes are parallel to each other, the plurality of second through holes are parallel to each other, and the first through holes and the second through holes are arranged in parallel.

In this specific embodiment, the upper connecting plate 1 and the lower connecting plate 5 are both cuboid plates, the first through holes extend along the width direction of the upper connecting plate 1 , and the second through holes extend along the width direction of the lower connecting plate 5 . . The shape memory alloy rope 2, the first through hole and the second through hole are arranged in two, the two first through holes are respectively arranged on the two side edges of the upper connecting plate 1, and the two second through holes are respectively arranged on the lower Connect the two side edges of the plate 5 . Both the upper connecting plate 1 and the lower connecting plate 5 are stainless steel plates.

This embodiment also includes connecting bolts. The middle of the lower connecting plate 5 is provided with bolt holes 4 , and the connecting bolts pass through the bolt holes 4 to fix the lower connecting plate 5 on the base.

As shown in FIG. 2 , the shape memory alloy rope 2 includes a stainless steel wire bundle 21 , a plurality of nickel-titanium alloy wire layers 22 and a stainless steel wire layer 23 which are sequentially sleeved from the inside to the outside. Specifically, the stainless steel wire bundle 21 is cylindrical, and the Nitinol wire layer 22 and the stainless steel wire layer 23 are circular sleeve shapes.

In this specific embodiment, two nickel-titanium alloy wire layers 22 are provided, and the stainless steel wire bundle 21 includes seven stainless steel wires. The shape memory alloy rope 2 is made of nickel-titanium alloy wire and stainless steel wire. There are seven stainless steel wires in the center to form a stainless steel wire bundle 21. Two layers of nickel-titanium alloy wire are wrapped around the stainless steel wire bundle 21, and the outermost layer is wrapped again. A layer of stainless steel wire, twisted together. Specifically, different vibration isolation effects can be achieved by using different numbers of nickel-titanium alloy wires and stainless steel wires for screwing.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for those of ordinary skill in the art, According to the idea of the present invention, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation on the present invention.

Claims (8)

1. A shape memory alloy vibration isolator, characterized in that it comprises an upper connecting plate, a lower connecting plate and a plurality of shape memory alloy ropes, the upper connecting plate is arranged above the lower connecting plate, and each shape memory The alloy ropes are all arranged between the upper connecting plate and the lower connecting plate, each of the shape memory alloy ropes is connected with the upper connecting plate and the lower connecting plate, and the lower connecting plate is used for fixing with the base . 2 . The shape memory alloy vibration isolator according to claim 1 , wherein the upper connecting plate and the lower connecting plate are arranged horizontally, and the upper connecting plate has a plurality of horizontally arranged first passages. 3 . There are a plurality of horizontally arranged second through holes on the lower connecting plate, the first through holes correspond to the second through holes one-to-one, and one of the shape memory alloy ropes passes through one of the first through holes. The two ends of the through hole and the two ends extending from the first through hole respectively extend to the inside of the second through hole through the two ends of the second through hole, and the two ends of the shape memory alloy rope are connected with the lower part. The connecting plate is fixedly connected, and the shape memory alloy rope is in an interference fit with the first through hole and the second through hole. 3 . The shape memory alloy vibration isolator according to claim 2 , further comprising a plurality of fixing bolts, two countersunk holes are provided above each of the second through holes, and each of the countersunk holes has two countersunk holes. 4 . One of the fixing bolts is installed, and the fixing bolts are used for fixedly connecting the two ends of the shape memory alloy rope with the lower connecting plate. 4. The shape memory alloy vibration isolator according to claim 2 or 3, wherein a plurality of the first through holes are parallel to each other, a plurality of the second through holes are parallel to each other, and the first through holes are parallel to each other. arranged in parallel with the second through hole. 5 . The shape memory alloy vibration isolator according to claim 1 , further comprising connecting bolts, bolt holes are provided in the middle of the lower connecting plate, and the connecting bolts pass through the bolt holes to connect the lower connecting plate. 6 . The connecting plate is fixed on the base. 6 . The shape memory alloy vibration isolator according to claim 1 , wherein the shape memory alloy rope comprises a stainless steel wire bundle, a plurality of nickel-titanium alloy wire layers and a stainless steel wire layer sleeved sequentially from the inside to the outside. 7 . . 7 . The shape memory alloy vibration isolator according to claim 6 , wherein the number of the nickel-titanium alloy wire layers is two, and the stainless steel wire bundle comprises seven stainless steel wires. 8 . 8 . The shape memory alloy vibration isolator according to claim 1 , wherein the upper connecting plate and the lower connecting plate are both stainless steel plates. 9 .

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