CN212360602U

CN212360602U - Vibration isolator with adjustable damping and rigidity

Info

Publication number: CN212360602U
Application number: CN202021112264.3U
Authority: CN
Inventors: 文桂林; 曾嵘; 卿启湘
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-01-15
Anticipated expiration: 2030-06-16

Abstract

The utility model discloses a vibration isolator with adjustable damping and rigidity, which comprises a damping adjusting system, a rigidity adjusting system, an upper vibration isolating plate and a lower vibration isolating plate; two ends of the damping adjusting system are respectively connected with the end parts of the upper vibration isolation plate and the lower vibration isolation plate; one end of the rigidity adjusting system is embedded into the middle of the upper vibration isolation plate, and the other end of the rigidity adjusting system is fixed in the middle of the lower vibration isolation plate; the damping characteristic of the damping adjustment system and the stiffness of the stiffness adjustment system can be adjusted between the upper vibration isolation plate and the lower vibration isolation plate. The utility model discloses a damping and adjustable isolator of rigidity have simple structure compactness, adjust advantages such as flexibility height, bearing capacity height and vibration isolation effect excellence.

Description

Vibration isolator with adjustable damping and rigidity

Technical Field

The utility model relates to a damping equipment technical field, in particular to isolator with adjustable damping and rigidity.

Background

Vibration isolation is one of the most widely used methods in vibration protection, which is to isolate the vibration source from the object to be protected by a vibration isolator. The vibration isolation functions to reduce dynamic coupling between the vibration source and the object to be isolated, thereby reducing the transmission of undesirable vibrations to or from the object to be protected. Traditional passive isolator, like spring isolator, have that bearing capacity is good, and resistant corrodes such as oil, water and solvent, do not receive temperature variation influence, can not ageing and creep characteristics such as, can reduce the transmission of vibration at the vibration isolation in-process, be applicable to noise abatement usually, improve the comfort level and prolong mechanical equipment life-span etc.. Meanwhile, the damping of the spring vibration isolator is extremely small (the damping ratio is about 0.005), so that the transmission rate is very high during resonance; vibration is easily transmitted along the steel wire at high frequency; rocking motion is easily produced and external damping and inert masses are often added.

Since the vibration isolator needs to work in various environments, the external and internal excitation of the vibration isolation system changes, and the stiffness and damping characteristics of the vibration isolator need to be adjusted to achieve the optimal vibration attenuation effect. The rigidity and damping characteristics of the traditional passive vibration isolator are determined during design, adaptability adjustment is difficult to realize after the traditional passive vibration isolator is installed, and the vibration isolation effect cannot reach the optimum when the traditional passive vibration isolator is used for dealing with variable working conditions. For example, the damper of the damping hole with the variable cross-section probe can only moderately adjust the damping characteristic to adapt to different working conditions. In general, few prior art vibration isolators are capable of being provided with a design in which both stiffness and damping are adjustable. Therefore, how the passive vibration isolator can realize the simultaneous adjustment of the damping and the rigidity has important significance for improving the adjustment flexibility of the vibration isolator, improving the vibration isolation effect and widening the application field of the vibration isolator.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in: to the technical problem that prior art exists, the utility model provides a simple structure is compact, can improve and adjust the flexibility, improve bearing capacity and can optimize the damping of vibration isolation effect and isolator with adjustable rigidity.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a vibration isolator with adjustable damping and rigidity comprises a damping adjusting system, a rigidity adjusting system, an upper vibration isolation plate and a lower vibration isolation plate, wherein one end of the damping adjusting system is connected with the end part of the upper vibration isolation plate, and the other end of the damping adjusting system is connected with the end part of the lower vibration isolation plate; one end of the rigidity adjusting system is embedded into the middle of the upper vibration isolation plate, and the other end of the rigidity adjusting system is fixed in the middle of the lower vibration isolation plate; the damping characteristic of the damping adjustment system and the stiffness of the stiffness adjustment system can be adjusted between the upper vibration isolation plate and the lower vibration isolation plate.

As a further improvement of the utility model: the damping adjusting system comprises a viscous damping sheet, an adjusting slide block and an elastic metal sheet; the size of the contact area between the viscous damping sheet and the elastic metal sheet is adjusted through the adjusting slide block so as to change the damping characteristic of the vibration isolator.

As a further improvement of the utility model: the viscous damping sheet is curled into a spiral shape and is adhered to the inner side of the elastic metal sheet; the adjusting slider is connected to the elastic metal sheet through the curled portion of the viscous damping sheet.

As a further improvement of the utility model: the adjusting slide block comprises a scraper and an adjusting column; the adjusting column is arranged on the curling part of the viscous damping sheet in a penetrating way; the scraper is fixed at the joint of the viscous damping sheet and the elastic metal sheet.

As a further improvement of the utility model: the scraper is a wedge-shaped scraper; the adjusting column is a long cylinder.

As a further improvement of the utility model: the elastic metal sheet is arc-shaped and is divided into an upper block and a lower block; one end of the upper elastic metal sheet is embedded into the upper vibration isolation plate, and the edge of the other end of the upper elastic metal sheet is bent into a circle; one end of the lower elastic metal sheet is embedded into the lower vibration isolation plate, and the edge of the other end of the lower elastic metal sheet is bent into a circle; the upper elastic metal sheet and the lower elastic metal sheet are hinged to form a Y-shaped structure.

As a further improvement of the utility model: the rigidity adjusting system comprises a top seat, a sliding cover and a conical spring; the rigidity of the conical spring is adjusted through the matching of the top seat and the sliding cover.

As a further improvement of the utility model: one end of the top seat is embedded into the upper vibration isolation plate, and the other end of the top seat is T-shaped and is connected with a sliding pair.

As a further improvement of the utility model: the sliding cover is arranged at the T-shaped end part of the top seat, and a buckle is arranged at the joint of the top seat and the sliding cover; the top seat and the sliding cover are matched to form a sliding pair.

As a further improvement of the utility model: the large end of the conical spring is fixed on the boss of the lower vibration isolation plate, and the small end of the conical spring is fixed on the upper vibration isolation plate through the top seat; the spiral line of the conical spring penetrates through the clearance of the sliding cover and is divided into an upper part and a lower part.

As a further improvement of the utility model: the cone apex angle of the conical spring is 20 degrees +/-5 degrees.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a damping and adjustable isolator of rigidity connect upper and lower vibration isolation plate's tip through setting up damping governing system, connect upper and lower vibration isolation plate's middle part through setting up rigidity governing system, have the characteristics of simple structure compactness, can carry out nimble regulation to the damping characteristic and the rigidity of isolator simultaneously between upper and lower vibration isolation plate.

2. The utility model discloses a damping and adjustable isolator of rigidity can receive and release the adjustment to viscidity damping fin through the position of removal regulation sliding closure to the area of contact size that changes viscidity damping fin and elastic metal piece adjusts the damping characteristic of adjustment isolator, realizes optimizing the purpose of vibration isolation effect.

3. The utility model discloses a damping and adjustable isolator of rigidity restrict conical spring's displacement through the sliding pair that footstock and sliding closure formed, and the number of turns of footstock is impressed in the adjustment conical spring, can adjust the rigidity characteristic of isolator, realizes optimizing the damping effect. In addition, the characteristics of gradual hardening of the stiffness and good stability of the conical spring are utilized, and the buffering performance of the vibration isolator under the impact action is improved.

4. The utility model discloses a isolator with adjustable damping and rigidity cooperates the bearing through setting up elastic metal piece and conical spring, has also improved the bearing stability of isolator when improving isolator bearing capacity.

Drawings

Fig. 1 is a schematic diagram of the structure principle of the present invention in a specific application example.

Fig. 2 is a schematic diagram of the shaft side structure of the damping adjustment system in a specific application example of the present invention.

Fig. 3 is a schematic diagram of the axial side structure of the adjusting slider in a specific application example of the present invention.

Fig. 4 is a schematic diagram of the axle side structure of the stiffness adjusting system in a specific application example of the present invention.

Illustration of the drawings:

1. a damping adjustment system; 2. a stiffness adjustment system; 3. an upper end vibration isolation plate; 4. a lower end vibration isolation plate; 101. a viscous damping fin; 102. adjusting the sliding block; 103. a resilient metal sheet; 104. adjusting the wedge-shaped scraper portion of the slide block; 105. adjusting the long cylindrical part of the slider; 201. a top seat; 202. a sliding cover; 203. a conical spring.

Detailed Description

The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.

As shown in fig. 1 to 4, the vibration isolator with adjustable damping and stiffness of the present invention comprises a damping adjustment system 1, a stiffness adjustment system 2, an upper vibration isolation plate 3 and a lower vibration isolation plate 4, wherein one end of the damping adjustment system 1 is connected with an end of the upper vibration isolation plate 3, and the other end is connected with an end of the lower vibration isolation plate 4; one end of the rigidity adjusting system 2 is embedded in the middle of the upper vibration isolation plate 3, and the other end is fixed in the middle of the lower vibration isolation plate 4. And the damping adjusting system and the rigidity adjusting system of the vibration isolator are combined through the upper vibration isolation plate and the lower vibration isolation plate. In the specific application process of the vibration isolator, the damping characteristic of the damping adjusting system 1 and the rigidity of the rigidity adjusting system 2 can be flexibly adjusted between the upper vibration isolation plate 3 and the lower vibration isolation plate 4 according to actual needs.

In a specific application example, referring to fig. 2, the damping adjustment system 1 includes a viscous damping sheet 101, an adjustment slider 102, and an elastic metal sheet 103. The size of the contact area between the viscous damping sheet 101 and the elastic metal sheet 103 is adjusted through the adjusting slide block 102 so as to change the damping characteristic of the vibration isolator.

In a specific application example, one end of the viscous damping sheet 101 is adhered to the inside of the elastic metal sheet 103, and the other end is curled in a spiral shape inside the elastic metal sheet 103. The adjustment slider 102 is attached to the elastic metal sheet 103 through the curled portion of the viscous damping sheet 101. The viscous damping sheet 101 is adhered to the inner side of the elastic metal sheet 103 and is curled into a spiral shape, and the damping characteristic of the vibration isolator can be adjusted by adjusting the retraction of the viscous damping sheet 101 through the adjusting slide block 102, so that the vibration isolator is convenient, quick, safe and reliable.

In a specific application example, the adjusting slider 102 comprises a scraper and an adjusting column. In this embodiment, referring to fig. 3, the adjustment slider 102 includes a wedge-shaped scraper 104 and an elongated cylinder 105. The long cylinder 105 is inserted through the spiral-wound portion of the viscous damping plate 101 to adjust the contact area between the viscous damping plate 101 and the elastic metal plate 103. The wedge-shaped scraper 104 is fixed at the joint of the viscous damping fin 101 and the elastic metal sheet 103, and particularly plays a role in fixing the joint of the viscous damping fin 101 and the elastic metal sheet 103. In this embodiment, the adjusting slider 102 has the characteristics of simple structure and high movement flexibility.

In a specific application example, the elastic metal sheet 103 is arc-shaped, the elastic metal sheet 103 is divided into an upper elastic metal sheet 103 and a lower elastic metal sheet 103, the upper elastic metal sheet 103 and the lower elastic metal sheet 103 are respectively positioned at the upper part and the lower part of the vibration isolator, and the joint between the two elastic metal sheets 103 is taken as a center for distinguishing. One end of the elastic metal sheet 103 positioned at the upper part of the upper vibration isolator is embedded into the upper vibration isolator 3, and the edge of the other end is bent into a circular shape; one end of the elastic metal piece 103 located at the lower portion of the vibration isolator is embedded in the lower vibration isolation plate 4, and the edge of the other end is bent in a circular shape. The upper elastic metal sheet 103 and the lower elastic metal sheet 103 are hinged to form a Y-shaped structure. Specifically, the edges of the upper and lower elastic metal sheets 103 are engaged and inserted with a latch to be fixed. It is understood that the edges of the upper and lower resilient metal sheets 103 may be fixed by other detachable means. In the embodiment, the elastic metal sheet is matched with the supporting spring, so that the bearing capacity of the vibration isolator is improved, and the bearing stability of the vibration isolator is also improved.

In a specific application example, referring to fig. 4, the stiffness adjusting system 2 includes a top seat 201, a sliding cover 202 and a conical spring 203. The stiffness of the conical spring 203 is adjusted by the cooperation of the top seat 201 and the sliding cover 202. In the embodiment, the characteristics of gradual stiffness and good stability of the conical spring are utilized, so that the buffering performance of the vibration isolator under the impact action is effectively improved.

Further, one end of the top seat 201 is embedded into the upper vibration isolation plate 3, and the other end is T-shaped and connected with a moving pair, so as to realize the stiffness adjustment of the supporting spring.

Further, the sliding cover 202 is disposed at the T-shaped end of the top seat 201, and the sliding cover 202 and the top seat 201 cooperate to form a sliding pair. The displacement of the supporting spring pressed into the top seat is adjusted through the sliding pair so as to change the rigidity of the vibration isolator.

In a specific application example, a square boss is arranged on the lower vibration isolation plate 4, the large end of the conical spring 203 is fixed on the square boss of the lower vibration isolation plate 4, the small end of the conical spring 203 is fixed on the upper vibration isolation plate 3 through the top seat 201, and the spiral line of the conical spring 203 penetrates through the gap of the sliding cover 202 to be divided into an upper part and a lower part. In order to accurately control the movement amount of the sliding cover 202 gap, a buckle is arranged at the connecting edge of the top seat 201 and the sliding cover 202, and the movement width of the sliding cover 202 gap is limited by the matching of the top seat 201 and the buckle. The number of turns of the conical spring 203 pressed into the top seat 201 is adjusted by adjusting the gap width of the sliding cover 202, and finally the rigidity adjustment of the vibration isolator is realized.

Further, in a specific embodiment, for better adjustment and fixation of the installation and working position of the conical spring 203 in the vibration isolator, the cone vertex angle of the conical spring 203 can be set to 20 °.

The utility model discloses an in the installation application process of isolator with adjustable damping characteristic and rigidity, it is fixed with the support that has the excitation source to go up vibration isolator 3 and be used for placing the carrier, arouses the deformation of elastic metal piece 103 and conical spring 203 under the excitation, and some energy of excitation is absorbed by the isolator, and another part energy transfer is to bearing the object. When the excitation or the load is changed, the contact area of the viscous damping sheet 101 and the elastic metal sheet 103 can be changed by moving the adjusting slider 102, so that the damping characteristic of the vibration isolator is changed; the rigidity of the supporting spring can be changed by adjusting the number of turns of the conical spring 203 pressed into the top seat 201, so that the rigidity of the vibration isolator can be adjusted; the damping optimization effect under different bearing masses and excitation can be realized by adjusting the damping characteristic and the rigidity of the vibration isolator.

The utility model discloses in, connect the tip of upper and lower vibration isolation board through setting up damping governing system to connect the middle part of upper and lower vibration isolation board through setting up rigidity governing system, carry out nimble regulation to the damping characteristic and the rigidity of isolator between upper and lower vibration isolation board, overcome the defect that passive isolator among the prior art is difficult to realize damping and rigidity adjustable simultaneously. Specifically, in the damping adjusting system, the viscous damping sheet is adjusted in an extending and contracting mode through the adjusting slide block, so that the size of the contact area between the viscous damping sheet and the elastic metal sheet is changed, and finally the damping characteristic of the vibration isolator is changed. In the rigidity adjusting system, the number of turns of the conical spring pressed into the top seat is adjusted through a sliding pair formed by the top seat and the sliding cover so as to change the rigidity of the supporting spring and finally change the rigidity of the vibration isolator. In addition, the upper and lower elastic metal sheets in the damping adjusting system are hinged to form a Y-shaped structure and are matched with the supporting spring, so that the stability of the vibration isolator in the bearing process is improved. The utility model discloses a damping and adjustable isolator of rigidity have simple structure compactness, adjust characteristics such as flexibility height, bearing capacity height and vibration isolation effect excellence.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous changes and modifications to the disclosed embodiments, or modify equivalent embodiments, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a isolator with adjustable damping and rigidity which characterized in that: the damping vibration isolation device comprises a damping adjusting system (1), a rigidity adjusting system (2), an upper vibration isolation plate (3) and a lower vibration isolation plate (4); one end of the damping adjusting system (1) is connected with the end part of the upper vibration isolation plate (3), and the other end of the damping adjusting system is connected with the end part of the lower vibration isolation plate (4); one end of the rigidity adjusting system (2) is embedded into the middle of the upper vibration isolation plate (3), and the other end of the rigidity adjusting system is fixed in the middle of the lower vibration isolation plate (4); the damping characteristic of the damping adjusting system (1) and the rigidity of the rigidity adjusting system (2) are adjusted between the upper vibration isolation plate (3) and the lower vibration isolation plate (4).

2. The adjustable damping and stiffness vibration isolator according to claim 1 wherein: the damping adjusting system (1) comprises a viscous damping sheet (101), an adjusting slide block (102) and an elastic metal sheet (103); the size of the contact area between the viscous damping sheet (101) and the elastic metal sheet (103) is adjusted through the adjusting slide block (102) so as to change the damping characteristic of the vibration isolator.

3. The adjustable damping and stiffness vibration isolator according to claim 2 wherein: the viscous damping sheet (101) is coiled into a spiral shape and is adhered to the inner side of the elastic metal sheet (103); the adjusting slider (102) is connected to the elastic metal sheet (103) through the curling part of the viscous damping sheet (101).

4. The adjustable damping and stiffness vibration isolator according to claim 3 wherein: the adjusting slide block (102) comprises a scraper and an adjusting column; the adjusting column is arranged on the curling part of the viscous damping sheet (101) in a penetrating way; the scraper is fixed at the joint of the viscous damping sheet (101) and the elastic metal sheet (103).

5. The adjustable damping and stiffness vibration isolator according to claim 4 wherein: the scraper is a wedge-shaped scraper (104); the adjusting column is a long cylinder (105).

6. The adjustable damping and stiffness vibration isolator according to claim 2 wherein: the elastic metal sheet (103) is arc-shaped; the elastic metal sheet (103) is divided into an upper block and a lower block; one end of the upper elastic metal sheet (103) is embedded into the upper vibration isolation plate (3), and the edge of the other end is bent into a circle; one end of the lower elastic metal sheet (103) is embedded into the lower vibration isolation plate (4), and the edge of the other end is bent into a circle; the upper elastic metal sheet (103) and the lower elastic metal sheet (103) are hinged to form a Y-shaped structure.

7. The adjustable damping and stiffness vibration isolator according to any one of claims 1 to 6, wherein: the stiffness adjusting system (2) comprises a top seat (201), a sliding cover (202) and a conical spring (203); the rigidity of the conical spring (203) is adjusted through the matching of the top seat (201) and the sliding cover (202).

8. The adjustable damping and stiffness vibration isolator according to claim 7 wherein: one end of the top seat (201) is embedded into the upper vibration isolation plate (3), and the other end of the top seat is T-shaped and is connected with a moving pair.

9. The adjustable damping and stiffness vibration isolator according to claim 8 wherein: the sliding cover (202) is arranged at the T-shaped end part of the top seat (201), and a buckle is arranged at the connection part of the top seat (201) and the sliding cover (202); the top seat (201) and the sliding cover (202) are matched to form a sliding pair.

10. The adjustable damping and stiffness vibration isolator according to claim 9 wherein: the large end of the conical spring (203) is fixed on the boss of the lower vibration isolation plate (4), and the small end of the conical spring (203) is fixed on the upper vibration isolation plate (3) through the top seat (201); the spiral line of the conical spring (203) passes through the gap of the sliding cover (202) and is divided into an upper part and a lower part.