A corrugated tube type composite damping vibration isolator

Abstract

The application provides a corrugated pipe type composite damping vibration isolator, a sealing element of the vibration isolator comprises a vertical corrugated pipe (2); a bearing surface for bearing external load is arranged on the top of the corrugated pipe; metal rubber wires (3) for forming a metal mesh elastic structure are filled in the inner cavity of the corrugated pipe; silicon oil (4) is injected into the metal mesh elastic structure; an air gap is arranged between the overall liquid surface of the upper part of the silicon oil and the bearing surface in the inner cavity of the corrugated pipe; when the vibration isolator bears load impact, the corrugated pipe, the metal mesh elastic structure and the silicon oil perform vibration isolation treatment on the impact force transmitted to the bearing surface; the application has a long service life, can still maintain good vibration isolation effect in severe conditions, and is simple and convenient to manufacture and install.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vibration damping and buffering technology, and particularly relates to a corrugated pipe type composite damping vibration isolator. BACKGROUND

[0002] With the development of modern industry, many vibration problems in engineering have become increasingly prominent. More and more complex engineering environments also require vibration isolators with excellent comprehensive performance to meet different use cases. Vibration control technology includes passive control technology, semi-active control technology and active control technology, and passive control technology is widely used because of its simple use, low manufacturing cost.

[0003] Common vibration isolation methods mainly include viscoelastic material vibration isolation, dry friction damping vibration isolation, fluid damping vibration isolation and the like. The viscoelastic material has a wide range of stiffness and damping, and the viscoelastic material vibration isolation is very effective when the temperature difference is not greater than 50 DEG C. According to the needs of actual engineering projects, the viscoelastic material can also form different structural forms, so the viscoelastic material damping vibration isolator is widely used. However, due to the narrow temperature range of the material, the equipment is easily affected and the function is lost under harsh conditions, so the material is not used in some cases.

[0004] The traditional dry friction damping has a wide effective vibration isolation frequency range, can bear a large load, and has stronger impact resistance, and is widely used in ships, missile transport tools and missile launchers. However, the restoring force hysteresis effect of the dry friction damping element makes the damping have non-smooth and strong nonlinear characteristics, which is the main reason restricting the application of the dry friction damping vibration isolation.

[0005] The fluid damping vibration isolation provides a wide range of damping forces that vary with the size of the vibration speed, is basically not affected by temperature and excitation frequency, has a simple structure and is easy to implement, and can produce different damping characteristics when the form of the damping hole or valve is different. Compared with the viscoelastic material and dry friction damping vibration isolation, the fluid damping vibration isolation has a broader application prospect.

[0006] In recent decades, the research on vibration isolators has been continuously deepened, and many vibration isolators such as fluid damping vibration isolators, piezoelectric damping vibration isolators, particle damping vibration isolators and magnetorheological damping vibration isolators have been used in various scenes due to their respective advantages. The vibration isolator using metal rubber has good comprehensive performance, can maintain high stability and good damping effect under extremely harsh conditions, and improves the service life of the vibration isolator, and has a good application prospect.

[0007] The most typical structure of the traditional fluid damping vibration isolator is composed of two groups of bellows, a sealed cavity is formed between the two groups of bellows, the damping liquid is in the sealed cavity, and the two groups of bellows are connected through a damping hole. When the vibration isolator is disturbed, the damping liquid will flow in or out through the middle damping hole. Due to the viscosity of the fluid, a damping force is generated to consume the vibration energy and achieve the purpose of vibration isolation. However, the traditional type of bellows vibration isolator has a relatively complex structure and is difficult to process. And only the bellows and the damping hole work, which is insufficient in life, durability and use effect. SUMMARY

[0008] The present application provides a bellows type composite damping vibration isolator, which can have a longer service life. It can still maintain good vibration isolation effect in harsh conditions. And the overall manufacturing and installation is simpler and more convenient.

[0009] The present application adopts the following technical solutions.

[0010] A bellows type composite damping vibration isolator, the seal of the vibration isolator includes a vertical bellow (2); the top of the bellow is provided with a load bearing surface for bearing external load; the inner cavity of the bellow is filled with metal rubber wire (3) for forming a metal mesh elastic structure; the metal mesh elastic structure is injected with silicone oil (4); in the inner cavity of the bellow, an air gap is provided between the overall liquid surface of the silicone oil in the upper part and the load bearing surface; when the vibration isolator bears load impact, the bellow, the metal mesh elastic structure and the silicone oil perform vibration isolation treatment on the impact force transmitted to the load bearing surface.

[0011] The bottom of the bellow is provided with a mounting surface for connecting an external mounting area.

[0012] The mounting surface includes a lower fixed flange (1) with a lower bolt hole (1a); the bellow is connected and fixed to the welding groove (1b) of the lower fixed flange in a welding manner.

[0013] The load bearing surface includes an upper fixed flange (5).

[0014] The upper fixed flange is connected to the equipment that needs to be isolated; the upper fixed flange (5) is provided with an upper bolt connection port (5a); the bellow is connected and fixed to the upper fixed flange in a welding manner.

[0015] When the vibration isolator bears load impact, the air in the air gap is compressed and the volume is reduced to avoid the silicone oil overflowing from the load bearing surface.

[0016] When the vibration isolator bears a load impact, the corrugated pipe is deformed under force, the metal rubber wires in the metal mesh elastic structure rub and extrude each other, the silicone oil in the metal mesh elastic structure is driven to flow in the mesh gap of the metal mesh elastic structure to generate damping force, which is used to consume the vibration energy of the impact force to reduce the vibration load.

[0017] The upper fixing flange is provided with an oil inlet (5b) and an exhaust port (5c) communicated with the inner cavity of the corrugated pipe, and the oil inlet (5b) and the exhaust port (5c) are provided with sealing bolts.

[0018] The assembly method of the corrugated pipe type composite damping vibration isolator comprises the following steps:

[0019] Step S1, first determine the flange and the size of the corrugated pipe according to the specific installation conditions, connect and weld the corrugated pipe with the welding groove of the lower flange first;

[0020] Step S2, according to the use condition, a certain amount of metal rubber wire is put into the corrugated pipe for filling, and then the upper fixing flange is welded with the corrugated pipe;

[0021] Step S3, inject silicone oil through the oil inlet, ensure that the exhaust port is in an open state at the same time, according to the required environment, inject a proper amount of silicone oil, and then ensure that a certain amount of air is left in it; finally, close the oil inlet and the exhaust port with the sealing bolts to complete the assembly of the vibration isolator.

[0022] The working method of the corrugated pipe type composite damping vibration isolator is as follows: the vibration isolator is installed between the equipment needing vibration isolation and the installation position, when the equipment generates vibration impact and transmits to the vibration isolator through rigid connection, the displacement and force generated by the vibration impact make the corrugated pipe deform a certain amount, and at the same time drive the mutual friction and extrusion between the internal metal rubber wires to consume the impact energy, in the process of corrugated pipe deformation, the air in the air gap is compressed, the compression air and the friction and extrusion of the metal rubber wires make the incompressible silicone oil flow in the small hole gap in the metal mesh elastic structure to generate small hole damping to further consume the impact energy, and through energy consumption, the purpose of vibration isolation is achieved.

[0023] The present application is aimed at the vibration reduction design requirement in complex conditions, and a sealed bellows is used as a vibration isolator main body in design, metal rubber is used as a main vibration reduction material, and a large amount of energy is dissipated by wire friction sliding extrusion. Meanwhile, a shear thinning fluid such as dimethyl silicone oil is used as auxiliary vibration reduction, and the viscous effect of the shear thinning fluid is used to flow in the metal rubber material gap to generate a small hole damping to consume vibration energy; a bellows type composite damping vibration isolator is developed based on the design thinking; compared with the existing technology, the bellows type metal rubber fluid damping vibration isolator designed by the present application not only utilizes the compressibility of the bellows to play a certain damping effect, but also utilizes the strong stability and high adaptability of the metal rubber, and the small hole damping of the multiple gaps in the metal rubber is used to improve the micro-vibration effect, and the high-frequency vibration isolation effect can be considered, and the energy dissipation can withstand a large load. It can have a long service life. In severe conditions, it can still maintain good vibration isolation effect. And the overall manufacturing and installation is more simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0025] The accompanying drawings are schematic diagrams of the present application; Figure 1

[0026] In the figure: 1, lower fixed flange; 1a, lower bolt hole; 1b, welding groove; 2, bellows; 3, metal rubber wire; 4, silicone oil; 5, upper fixed flange; 5a, upper bolt connection port; 5b, oil inlet; 5c, exhaust port; 5d, welding groove. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0028] As shown in the figure, a bellows type composite damping vibration isolator, the seal of the vibration isolator includes a vertical bellows 2; the top of the bellows is provided with a load bearing surface for bearing external load; the bellows cavity is filled with metal rubber wire 3 for forming a metal mesh elastic structure; the metal mesh elastic structure is filled with silicone oil 4; in the bellows cavity, an air gap is provided between the overall liquid surface of the silicone oil upper portion and the load bearing surface; when the vibration isolator bears load impact, the bellows, the metal mesh elastic structure and the silicone oil perform vibration isolation treatment on the impact force transmitted to the load bearing surface.

[0029] The bottom of the bellows is provided with a mounting surface for connecting an external mounting area.

[0030] ​The mounting surface comprises a lower fixing flange 1 with a lower bolt hole 1a; the corrugated pipe is connected and fixed to the welding groove 1b of the lower fixing flange in a welding manner.

[0031] The bearing surface comprises an upper fixing flange 5.

[0032] The upper fixing flange is connected to the equipment requiring vibration isolation; the upper fixing flange 5 is provided with an upper bolt connection port 5a; the corrugated pipe is connected and fixed to the upper fixing flange in a welding manner.

[0033] When the isolator bears a load impact, the air in the air gap is compressed and the volume is reduced to avoid the overflow of silicone oil from the bearing surface.

[0034] When the isolator bears a load impact, the corrugated pipe is deformed under force, so that the metal rubber wires in the metal mesh elastic structure rub and press each other, driving the silicone oil in the metal mesh elastic structure to flow in the mesh gap of the metal mesh elastic structure to generate damping force, which is used to consume the vibration energy of impact force to reduce the vibration load.

[0035] The upper fixing flange is provided with an oil inlet 5b and an exhaust port 5c communicating with the inner cavity of the corrugated pipe, and the oil inlet 5b and the exhaust port 5c are provided with sealing bolts.

[0036] The assembly method of the corrugated pipe type composite damping isolator comprises the following steps:

[0037] Step S1, first determine the size of the flange plate and the corrugated pipe according to the specific installation conditions, connect and weld the corrugated pipe to the welding groove of the lower flange plate first;

[0038] Step S2, according to the use condition, a certain amount of metal rubber wires are filled into the corrugated pipe, and then the upper fixing flange is welded and fixed to the corrugated pipe;

[0039] Step S3, the silicone oil is injected through the oil inlet, and the exhaust port is kept open at the same time; according to the required environment, a proper amount of silicone oil is injected, and a certain amount of air is left in it; finally, the oil inlet and the exhaust port are closed with sealing bolts, and the assembly of the isolator is completed.

[0040] The working method of the corrugated pipe type composite damping vibration isolator is specifically as follows: the vibration isolator is installed between a device requiring vibration isolation and an installation position; when the device generates vibration impact and transmits the vibration impact to the vibration isolator through rigid connection, displacement and force generated by the vibration impact cause a certain amount of deformation of the corrugated pipe, and simultaneously drive mutual friction and extrusion between the internal metal rubber wires to consume impact energy; in the deformation process of the corrugated pipe, air in the air spacing is compressed; the combined action of the compressed air and the friction and extrusion of the metal rubber wires causes the incompressible silicone oil to flow in the small hole gap in the metal mesh elastic structure to generate small hole damping to further consume impact energy, and the purpose of vibration isolation is achieved through energy consumption.

[0041] Embodiment:

[0042] In this example, a corrugated pipe type metal rubber fluid damping vibration isolator can be fixed and arranged in other structures through the lower fixing flange 1 and the lower bolt hole 1a above, and the upper fixing flange 5 and the bolt hole 5a (upper bolt connection port) thereof are connected with the device requiring vibration isolation; wherein the corrugated pipe 2 plays a sealing role to wrap the metal rubber wires 3 and the silicone oil 4 therein; wherein the corrugated pipe 2, the metal rubber wires 3 and the silicone oil 4 can all play a role in vibration isolation when bearing load impact.

[0043] When assembled and manufactured, first, the flange plate and the size of the corrugated pipe are determined according to the specific installation condition; the corrugated pipe is first connected and welded to the welding groove 1b of the lower flange plate 1, and then a certain amount of metal rubber wires 3 is put into the corrugated pipe 2 for filling according to the use condition; then the upper fixing flange 5 is welded to the corrugated pipe 2; the silicone oil 4 is injected through the oil inlet 5b, and the exhaust port 5c is also opened at the same time; after a proper amount of silicone oil is injected according to the required environmental requirements, a certain amount of air is ensured to remain therein; and the oil inlet 5b and the exhaust port 5c are closed by bolts. The assembly of the vibration isolator is completed.

[0044] When working, the vibration isolator is installed between a device requiring vibration isolation and an installation position; the device generates vibration impact and transmits the vibration impact to the vibration isolator through rigid connection; displacement and force generated by the vibration impact cause a certain amount of deformation of the corrugated pipe 2, and simultaneously drive friction and extrusion of the internal metal rubber wires 3 to consume energy; because a certain amount of air is left in the vibration isolator, the air is compressed due to the deformation; the combined action of the compressed air and the friction and extrusion of the metal rubber wires causes the incompressible silicone oil 4 to flow in the small hole gap therein to generate small hole damping to consume energy. Finally, the generated energy is consumed to achieve the purpose of vibration isolation.

[0045] The above only describes the preferred examples of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bellows type composite damper isolator characterized by: The sealing member of the vibration isolator comprises a vertical bellows (2), a load bearing surface on the top of the bellows for bearing external load, metal rubber wires (3) filled in the inner cavity of the bellows for forming a metal mesh elastic structure, silicon oil (4) injected in the metal mesh elastic structure, and an air gap between the overall liquid surface of the silicon oil on the top and the load bearing surface in the inner cavity of the bellows; when the vibration isolator bears load impact, the bellows, the metal mesh elastic structure and the silicon oil isolate the impact force transmitted to the load bearing surface; The bottom of the bellows is provided with a mounting surface for connecting the external mounting area; The mounting surface comprises a lower fixing flange (1) with a lower bolt hole (1a); the bellows is connected and fixed to the lower fixing flange at a welding groove (1b) in a welding manner; The load bearing surface comprises an upper fixing flange (5); The upper fixing flange is connected to the equipment requiring vibration isolation; the upper fixing flange (5) is provided with an upper bolt connection port (5a); the bellows is connected and fixed to the upper fixing flange in a welding manner; When the vibration isolator bears load impact, the air in the air gap is compressed and the volume is reduced to avoid the overflow of the silicon oil from the load bearing surface; When the vibration isolator bears load impact, the bellows is deformed under stress, the metal rubber wires in the metal mesh elastic structure are rubbed and pressed against each other, the silicon oil in the metal mesh elastic structure is driven to flow in the mesh gap of the metal mesh elastic structure to generate damping force for consuming the vibration energy of the impact force and reducing the vibration load; The upper fixing flange is provided with an oil inlet (5b) and an exhaust port (5c) communicating with the inner cavity of the bellows, and the oil inlet (5b) and the exhaust port (5c) are provided with a closing bolt.

2. A bellows type compound damping vibration isolator according to claim 1, characterized in that: The assembly method of the bellows type composite damping vibration isolator comprises the following steps: Step S1, first determine the flange and the size of the bellows according to the specific installation conditions, connect and weld the bellows to the welding groove of the lower flange; Step S2, according to the use condition, a certain amount of metal rubber wire is put into the bellows for filling, and then the upper fixing flange is welded and fixed to the bellows; Step S3, the silicon oil is injected through the oil inlet, the exhaust port is kept open at the same time, a certain amount of air is left in the silicon oil according to the required environment, and finally the oil inlet and the exhaust port are closed with the closing bolt to complete the assembly of the vibration isolator.

3. A bellows type compound damping vibration isolator according to claim 1, characterized in that: The working method of the bellows type composite damping vibration isolator is as follows: the vibration isolator is installed between the equipment requiring vibration isolation and the mounting position, when the equipment generates vibration impact and transmits it to the vibration isolator through rigid connection, the displacement and force generated by the vibration impact cause a certain amount of deformation of the bellows, which drives the mutual friction and pressing of the internal metal rubber wires to consume the impact energy, the air in the air gap is compressed during the deformation of the bellows, and the combined action of the compressed air and the friction and pressing of the metal rubber wires makes the incompressible silicon oil flow in the small hole gap in the metal mesh elastic structure to generate small hole damping to further consume the impact energy, thereby achieving the purpose of vibration isolation.

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