Multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device and working method thereof

Abstract

The present application relates to a kind of multi-degree of freedom and anti-large deformation metal damping vibration isolation device, including base, the opposite side of the base is provided with support body, annular array is distributed between the support body and base several vibration isolation legs, the vibration isolation leg is all inclined to the outside along the direction of support body to base, and vibration isolation leg is all connected with support body via upper joint ball hinge bearing, all connected with base via lower joint ball hinge bearing, pre-tightening adjusting mechanism is further connected between the support body and base.Can ensure that the isolator is in the best working range, provide maximum damping effect, reduce vibration transmission and noise level.Both for some equipment that need larger vibration isolation buffer stroke, also for traditional automobile, machinery and other fields and aerospace, marine chemical industry, nuclear power and other harsh working environment equipment field.

Description

TECHNICAL FIELD

[0001] The present application relates to a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device and a working method thereof. BACKGROUND

[0002] When a ship is running, the power equipment on the ship will produce complex vibration phenomena during operation. Poor vibration will affect the normal operation of the ship, affect the service life of important internal equipment, and it is very difficult to repair and maintain the equipment at sea. Therefore, the ship vibration isolation system is very important in modern ship design, which can ensure the smooth sailing of the ship and the comfort and safety of personnel. At present, the most commonly used in the field of ships is the traditional rubber isolator, but the rubber material will appear aging, cracking and failure under the action of long-term vibration and impact, which will affect its vibration isolation effect and service life, and in the power equipment, it will be affected by temperature. In view of the above problems, in recent years, some scholars have designed pure metal vibration isolation, such as steel wire rope vibration isolator, all-metal rubber vibration isolator, metal plate vibration isolator, etc., but the marine environment is relatively complex, and the ship usually produces large floating, so the existing vibration isolator needs to meet the large deformation and multi-directional vibration isolation requirements. The existing pure metal vibration isolator is mainly for single-directional vibration isolation, and when subjected to large deformation impact, due to the limitation of the material and structural design of the vibration isolation element, the vibration isolation effect may be lost, the vibration isolation element may be damaged, and the stability of the ship may be affected.

[0003] The problems and defects of the existing vibration isolation device mainly include:

[0004] (1) The existing rubber isolator or hydraulic control system is difficult to meet the complex environment of high / low temperature, salt spray corrosion, heat and humidity, and anti-aging at the same time, which is mainly determined by the material of the vibration isolation element. Under the above complex multiple environments, with the increase of the use cycle, the reliability of the material performance will be greatly affected.

[0005] (2) The existing rubber isolator is easy to be damaged or destroyed during the resistance to three-directional large deformation, and the vibration isolation performance is difficult to recover. In addition, the existing simple inclined spring mechanism or hydraulic system has poor flexibility adjustment at the connection part of the vibration isolation device.

[0006] (3) Most of the existing multi-degree-of-freedom vibration isolators adopt the connection mode of spherical hinge or universal joint, which has poor structure stability because the size of the pre-tightening force cannot be controlled, and the vibration isolator may not provide sufficient damping effect, thereby affecting the stability and performance of the equipment or structure. SUMMARY

[0007] In view of the deficiencies of the prior art, the technical problem to be solved by the present application is to provide a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device and a working method thereof.

[0008] In order to solve the above technical problems, the technical scheme of the present application is: a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device, comprising a base, opposite faces of the base are provided with support bodies, a plurality of vibration isolation legs are arranged in an annular array between the support bodies and the base, the vibration isolation legs are all inclined outward along the direction from the support body to the base, and the vibration isolation legs are all connected with the support body through upper joint ball hinge bearings and connected with the base through lower joint ball hinge bearings, and a pre-tightening adjusting mechanism is further connected between the support body and the base.

[0009] Preferably, a threaded hole is formed in the top of the support body, which is used to connect with a vibration source, and a plurality of through holes are arranged in an annular array on the base, which are used to fixedly connect with a base.

[0010] Preferably, the base is provided with an obliquely arranged threaded seat at each corner position connected with the vibration isolation leg, and the lower joint ball hinge bearing is mounted on the corresponding threaded seat.

[0011] Preferably, the oblique angle of the threaded seat is 35.26°.

[0012] Preferably, the vibration isolation leg comprises an upper housing and a lower housing, the lower housing is fixedly connected with the lower joint ball hinge bearing through a bolt, the lower housing is fixedly connected with the upper housing through a bolt at the top, the vibration isolation leg comprises an annular metal rubber, a first rectangular spring, a guide rod and a guide block, the upper joint ball hinge bearing is fixedly connected with the top end of the guide rod through a thread, the annular metal rubber is symmetrically sleeved on the guide rod, the guide block is also symmetrically sleeved on the guide rod, wherein the two guide blocks are located on the inner side of the same end side annular metal rubber, and the first rectangular spring is sleeved on the guide rod between the two guide blocks.

[0013] Preferably, the pre-tightening adjusting mechanism comprises an upper spring seat, a second rectangular spring and a lower spring seat, the upper spring seat is connected with the support body through a screw rod, the lower spring seat is connected with the base through a screw rod, and the upper and lower ends of the second rectangular spring are respectively arranged in the cavities of the upper spring seat and the lower spring seat.

[0014] Preferably, a rotating protrusion is fixedly arranged on the outer side wall of the lower spring seat.

[0015] A working method of a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device is performed according to the following steps:

[0016] (1) When the support body moves vertically upward, the vibration isolation device is in tension, the upper joint ball hinge bearing moves, the upper joint ball hinge bearing drives the guide rod inside the vibration isolation support leg, and then the guide rod compresses the annular metal rubber, the annular metal rubber compresses the guide block, the guide block compresses the first rectangular spring, and then vibration damping and energy dissipation are realized; due to the limiting effect of the upper shell and the lower shell, the guide block can only slide along the inner wall of the shell; the guide rod can only move axially along the first rectangular spring due to the limitation of the guide block, and the first rectangular spring is always compressed by axial load; the contact surfaces of the guide block and the inner wall of the shell and the contact surfaces of the guide block and the guide rod are coated with a metal wear-resistant coating;

[0017] (2) When the support body moves vertically downward, the vibration isolation device is in compression, the upper joint ball hinge bearing moves, and then the upper joint ball hinge bearing compresses the annular metal rubber, the annular metal rubber compresses the guide block, the guide block compresses the first rectangular spring, and then vibration damping and energy dissipation are realized; in addition, due to the effect of the pre-tightening adjustment mechanism, the support body also compresses the second rectangular spring to provide certain support;

[0018] (3) When the support body moves horizontally, part of the spring of the vibration isolation device bears the compression load from the upper joint ball hinge bearing, and the other part of the spring bears the compression load from the guide rod; the spring of the support body is always compressed when it moves in any direction.

[0019] Compared with the prior art, the present application has the following beneficial effects: the present application adopts an inclined vibration isolation structure, which reduces the size and weight of the vibration isolator compared with the relative horizontal placement of the spring. A pre-tightening adjustment is provided between the support body and the base, and by adjusting the pre-tightening force at any time, the performance of the vibration isolator can be flexibly adjusted according to the actual situation, so that it can adapt to various vibration environments. Thus, the effective vibration absorption and isolation effect is maximized. In addition, the pre-tightening force adjustment can help optimize the working state of the vibration isolator, and by accurately adjusting the pre-tightening force, the vibration isolator can be ensured to be in the best working range, providing the maximum damping effect and reducing the vibration transmission and noise level. It is suitable for some equipment that requires larger vibration isolation and buffering stroke, as well as traditional automobiles, machinery and other fields, and aerospace, marine, chemical and nuclear power equipment fields with harsh working environments.

[0020] The present application will be further described in detail below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the embodiment of the present application is shown Figure 1 .

[0022] Figure 2 The structure of the embodiment of the present application is shown Figure 2 .

[0023] Figure 3 is a sectional view of the vibration isolation leg.

[0024] Figure 4 is a schematic view of the pre-tightening adjustment mechanism.

[0025] In the figure: 1. support body, 2. vibration isolation leg, 3. upper spherical hinge bearing, 4. base, 5. lower spherical hinge bearing, 6. pre-tightening adjustment mechanism, 201. upper housing, 202. lower housing, 203. annular metal rubber, 204. first rectangular spring, 205. guide rod, 206. guide block, 601. upper spring seat, 602. second rectangular spring, 603. lower spring seat, 7. threaded seat, 8. rotating block, 9. screw rod, 10. concave cavity. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with the drawings and examples.

[0027] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0028] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0029] As shown in Figures 1-4 The present embodiment provides a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device, which comprises a base, the opposite side of the base is provided with a support body, four vibration isolation legs are arranged in an annular array between the support body and the base, the vibration isolation legs are all inclined outward along the direction from the support body to the base, and the vibration isolation legs are all connected with the support body through upper spherical hinge bearings and connected with the base through lower spherical hinge bearings, and a pre-tightening adjustment mechanism is further connected between the support body and the base. In structure, the inclined vibration isolation and the metal wire mesh porous damping element (also known as metal rubber) in series and the damping structure form of threaded connection with the multi-degree-of-freedom spherical hinge bearing are adopted to solve a series of problems such as difficult realization of three-way large deformation damping stroke and inability to guarantee stable three-way damping stiffness of the isolator under the constraint condition of small external size, and difficult service in extreme environments such as high / low temperature, salt spray, and humidity.

[0030] In the embodiment of the present application, the top of the support body is provided with a threaded hole for connecting with a vibration source, and the base is provided with four through holes arranged in an annular array for fixedly connecting with a base.

[0031] In the embodiment of the present application, the base is provided with an obliquely arranged threaded seat at each of the four corners where the vibration isolation legs are connected, and the lower spherical hinge bearing is mounted on the corresponding threaded seat.

[0032] In the embodiment of the present application, the oblique angle of the threaded seat is 35.26°, which ensures the characteristic of three-way equal rigidity.

[0033] In the embodiment of the present application, the vibration isolation leg is externally provided with an upper shell and a lower shell, the lower shell is fixedly connected with the lower spherical hinge bearing through bolts, the lower shell is fixedly connected with the upper shell through bolts at the top, the vibration isolation leg is internally composed of an annular metal rubber, a first rectangular spring, a guide rod and a guide block, the upper spherical hinge bearing is fixedly connected with the top end of the guide rod through threads, the annular metal rubber is symmetrically sleeved on the guide rod, the guide block is also symmetrically sleeved on the guide rod, the two guide blocks are located on the inner side of the same end side annular metal rubber, and the first rectangular spring is sleeved on the guide rod between the two guide blocks. No matter whether the vibration isolation leg is subjected to tension or pressure, the first rectangular spring is always under compression, and an annular metal rubber is always provided to provide damping.

[0034] In the embodiment of the present application, the pre-tightening adjusting mechanism comprises an upper spring seat, a second rectangular spring and a lower spring seat, the upper spring seat is connected with the support body through a screw rod, the lower spring seat is connected with the base through a screw rod, and the upper and lower ends of the second rectangular spring are respectively arranged in recesses in the upper spring seat and the lower spring seat. The upper and lower spring seats are fixedly connected with the corresponding screw rods.

[0035] In the embodiment of the present application, a rotating lug is fixedly arranged on the outer side wall of the lower spring seat, which facilitates rotating the lower spring seat and the screw rod, changing the axial position of the screw rod, adjusting the vertical position of the lower spring seat, changing the compression amount of the second rectangular spring, and adjusting the pre-tightening force.

[0036] In the embodiment of the present application, a damping structure form of a slanted rectangular spring and a metal wire mesh porous damping element (also known as metal rubber) in series and threadedly connected with a multi-degree-of-freedom joint ball hinge bearing is adopted in structure, realizing small size of the vibration isolator, three-way equal rigidity, large damping energy dissipation, and three-way large displacement damping stroke of the vibration isolator regardless of tension or compression. A pre-tightening adjusting mechanism is designed, and the performance of the vibration isolator can be flexibly adjusted according to actual conditions by adjusting the pre-tightening force at any time, so that the vibration isolator can adapt to various vibration environments. Thus, effective vibration absorption and isolation effects are maximized. In the selection of the material of the parts of the vibration isolator, stainless steel is used for the parts except the spring. The spring is made of high manganese steel, and the surface is plated with nickel for corrosion protection. For the joint ball hinge bearing, a metal wear-resistant coating is used on the contact surface of the ball hinge, thereby increasing the dynamic wear resistance of the joint ball hinge bearing.

[0037] A working method of a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device is performed in the following steps:

[0038] First, the four through holes on the base are used for fixed connection with the base, and then the threaded holes on the support body are connected with the vibration source. Finally, according to the vibration isolation environment and rigidity requirement, the spring seat is rotated to adjust the rigidity and pre-tightening force of the vibration isolator.

[0039] (1) When the support body moves vertically upward, the vibration isolation device is in tension, the upper joint ball hinge bearing moves, the upper joint ball hinge bearing drives the guide rod inside the vibration isolation support leg to move, the ring-shaped metal rubber is compressed by the guide rod, the guide block is compressed by the ring-shaped metal rubber, the first rectangular spring is compressed by the guide block, and then damping energy dissipation is realized. Due to the limiting effect of the upper and lower housings, the guide block can only slide along the inner wall of the housing. The guide rod can only move axially along the first rectangular spring due to the limitation of the guide block, and the first rectangular spring is always compressed by the axial load. The contact surfaces of the guide block and the housing inner wall and the contact surfaces of the guide block and the guide rod are coated with a metal wear-resistant coating.

[0040] (2) When the support body moves vertically downward, the vibration isolation device is in compression, the upper joint ball hinge bearing moves, the ring-shaped metal rubber is compressed by the upper joint ball hinge bearing, the guide block is compressed by the ring-shaped metal rubber, the first rectangular spring is compressed by the guide block, and then damping energy dissipation is realized. In addition, due to the action of the pre-tightening adjusting mechanism, the support body also compresses the second rectangular spring to provide certain support.

[0041] (3) When the support body moves horizontally, part of the spring of the vibration isolation device bears the compression load from the upper joint ball hinge bearing, and the other part of the spring bears the compression load from the guide rod. The spring of the support body is always compressed regardless of the direction of movement.

[0042] The metal wire mesh porous damping element and other metal elements are made of metal material, have high durability and corrosion resistance, are suitable for long-term use and harsh environmental conditions of ships. The internal structure is simple and easy to maintain, and does not need to be replaced or maintained frequently, which can reduce the operating cost of the ship.

[0043] The inclined spring is used in the structure, compared with the horizontally placed spring, so that the size and overall weight of the vibration isolator are greatly reduced. The rectangular spring is connected in series with the metal wire mesh porous damping element, and the damping structure is connected with the multi-degree-of-freedom joint ball hinge bearing by threads, so that the vibration isolator realizes three-direction large displacement damping stroke, large damping energy consumption and equal stiffness damping under the condition of small size constraint.

[0044] The pre-tightening adjusting mechanism is arranged between the support body and the base, the pre-tightening force can be adjusted at any time, the performance of the vibration isolator can be flexibly adjusted according to the actual situation, so that it can adapt to various vibration environments. Therefore, the effective vibration absorption and isolation effect is maximized. In addition, the pre-tightening force adjustment can help to optimize the working state of the vibration isolator, by accurately adjusting the pre-tightening force, the vibration isolator can be ensured to be in the best working range, the maximum damping effect can be provided, and the vibration transmission and noise level can be reduced.

[0045] The present application is suitable for some equipment which needs large damping stroke, and is also suitable for traditional automobile, machinery and other fields, and aerospace, marine, chemical industry, nuclear power and other harsh working environment equipment fields.

[0046] The above is only the preferred embodiment of the present application, and is not limited to other forms, any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still belongs to the protection scope of the present application.

Claims

1. A multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device, characterized in that: The base is provided with a support body, and a plurality of vibration isolation legs are arranged in an annular array between the support body and the base, and are inclined outward along the direction from the support body to the base, and are connected with the support body through upper spherical hinge bearings and connected with the base through lower spherical hinge bearings, and a pre-tightening adjusting mechanism is further connected between the support body and the base; a threaded hole is formed in the top of the support body, and is used to connect with a vibration source, and a plurality of through holes are arranged in an annular array on the base, and are used to fixedly connect with a base; the pre-tightening adjusting mechanism comprises an upper spring seat, a second rectangular spring and a lower spring seat, the upper spring seat is screwed with the support body through a screw rod, the lower spring seat is screwed with the base through a screw rod, and the upper and lower ends of the second rectangular spring are respectively arranged in cavities in the upper spring seat and the lower spring seat.

2. The multi-DOF and large deformation resistant metal damper-isolator device according to claim 1, characterized in that: The base is provided with a support body, and a plurality of vibration isolation legs are arranged in an annular array between the support body and the base, and are inclined outward along the direction from the support body to the base, and are connected with the support body through upper spherical hinge bearings and connected with the base through lower spherical hinge bearings, and a pre-tightening adjusting mechanism is further connected between the support body and the base; a threaded hole is formed in the top of the support body, and is used to connect with a vibration source, and a plurality of through holes are arranged in an annular array on the base, and are used to fixedly connect with a base; the pre-tightening adjusting mechanism comprises an upper spring seat, a second rectangular spring and a lower spring seat, the upper spring seat is screwed with the support body through a screw rod, the lower spring seat is screwed with the base through a screw rod, and the upper and lower ends of the second rectangular spring are respectively arranged in cavities in the upper spring seat and the lower spring seat.

3. The multi-DOF and large deformation resistant metal damper-isolator device according to claim 2, characterized in that: The inclined angle of the threaded seat is 35.26°.

4. The multi-DOF and large deformation resistant metal damper-isolator device according to claim 3, characterized in that: The outer part of the vibration isolation leg comprises an upper housing and a lower housing, the lower housing is fixedly connected with the lower spherical hinge bearing through a bolt, the top of the lower housing is fixedly connected with the upper housing through a bolt, the inner part of the vibration isolation leg is composed of an annular metal rubber, a first rectangular spring, a guide rod and a guide block, the upper spherical hinge bearing is fixedly connected with the top end of the guide rod through a thread, the annular metal rubber is symmetrically sleeved on the guide rod, the guide block is also symmetrically sleeved on the guide rod, wherein the upper and lower guide blocks are located on the inner side of the same end side annular metal rubber, and the first rectangular spring sleeved on the guide rod is arranged between the upper and lower guide blocks.

5. The multi-DOF and large deformation resistant metal damper-isolator device according to claim 4, characterized in that: A rotating lug is fixedly arranged on the outer side wall of the lower spring seat.

6. A method of operating a multi-degree-of-freedom and large deformation resistant metal damping vibration isolation device as claimed in claim 5, wherein, The following steps are performed: (1) When the support body moves vertically upward, the vibration isolation device is in tension, the upper spherical hinge bearing moves, the guide rod in the vibration isolation leg is driven to move, the annular metal rubber is compressed, the guide block is compressed, the first rectangular spring is compressed, and vibration energy dissipation is realized; Due to the limiting effect of the upper housing and the lower housing, the guide block can only slide along the inner wall of the housing; the guide rod can only move axially along the first rectangular spring due to the limitation of the guide block, and the first rectangular spring is always compressed by axial load; the contact surfaces of the guide block and the inner wall of the housing and the contact surfaces of the guide block and the guide rod are coated with a metal wear-resistant coating; (2) When the support body moves vertically downward, the vibration isolation device is in compression, the upper spherical hinge bearing moves, the annular metal rubber is compressed, the guide block is compressed, the first rectangular spring is compressed, and vibration energy dissipation is realized; in addition, due to the effect of the pre-tightening adjusting mechanism, the support body also compresses the second rectangular spring to provide certain support; (3) When the support body moves horizontally, part of the springs of the vibration isolation device bear compression load from the upper spherical hinge bearing, and the other part of the springs bear compression load from the guide rod; The spring of the support is always under compression when the support is moved in any direction.

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