CN117739054A - Non-sealing metal viscous damper - Google Patents

Abstract

The invention discloses a sealless metal viscous damper which comprises a telescopic device, a mandrel, a connecting rod, end covers, a sleeve, connecting lugs and damping fluid, wherein the mandrel is arranged in the middle of the sealless damper, the telescopic device is fixedly arranged at two ends of the mandrel, the connecting rod penetrates through the center of the mandrel and can slide in the middle of the mandrel, the end covers are arranged at two ends of the connecting rod, and the connecting rod is connected with the telescopic device through the end covers. The damping device is applied to the damping field of buildings, bridges and industrial equipment, has simple structure, does not need sliding sealing, and does not have the problems of oil seepage and oil leakage.

Description

Non-sealing metal viscous damper

Technical Field

The invention relates to the technical field of shock absorption, in particular to a non-sealing metal viscous damper which is mainly used for solving the problems of oil seepage and oil leakage of the existing viscous damper.

Background

Viscous dampers are a common type of shock absorbing device that achieve a damping effect by utilizing the damping characteristics of viscous fluids. Viscous dampers are widely used in the fields of mechanical engineering, aerospace, automobile manufacturing, shock insulation, vibration absorption and the like. The basic structure of the viscous damper comprises a piston and a sealing sleeve, the middle of which is filled with viscous fluid. When the system moves, the piston can push the viscous fluid to flow, and the viscous resistance of the viscous fluid can generate a damping effect, so that the damping effect is achieved.

Currently, in the damping industry, a damper with a sliding sealing structure is generally used, however, due to aging of a sealing ring, the existing viscous damper often has problems of oil seepage and oil leakage. Oil leakage and oil leakage can result in a reduction of viscous fluid and air entering the damper cavity, thereby degrading the performance of the damper. Therefore, there is a constant need in the industry to reduce the likelihood of leakage by periodic inspection and maintenance operations, timely replacement of aged and damaged seals, or selection of better sealing materials and sealing structures. In a word, to viscous damper have the problem of oil seepage and oil leak, all can increase manufacturing cost and later maintenance cost, and have the potential safety hazard that causes because of damping fluid reveal.

Disclosure of Invention

In order to solve the defects and drawbacks of the prior art, the inventor provides a metal viscous damper without sliding seal through research and development, the structure solves the problems of oil seepage and oil leakage of the traditional damper, and meanwhile, the technology can reduce maintenance cost, improve reliability and stability and prolong service life. This helps to improve the working efficiency and sustainability of the system, reduce the operating costs, and meet environmental requirements. Specifically, the invention is realized as follows:

a sealless metallic viscous damper comprising the structure:

a sleeve for mounting the mandrel and accommodating a set of retractors;

the mandrel is arranged at the top of the sleeve, is used as a channel shaft for providing telescopic displacement of the connecting rod, and is provided with a damping fluid communication gap;

the connecting rod penetrates through the mandrel, one end of the connecting rod is positioned in the sleeve, and the other end of the connecting rod is positioned outside the sleeve;

the telescopic device is provided with two groups, which are respectively arranged at two sides of the mandrel, one group is arranged inside the sleeve, the other group is arranged outside the sleeve, and the telescopic device wraps the corresponding connecting rod and is fixed with the end of the connecting rod at the end part, so that a sealed inner cavity is formed between the telescopic device and the connecting rod, and the telescopic device can correspondingly stretch along with the stretch movement of the connecting rod;

the damping fluid communication gap is arranged on the mandrel or in the connecting rod and is used for communicating the two sealed inner cavities;

damping fluid is sealed in the sealed inner cavities of the two groups of retractors and circulates mutually through a damping inter-fluid communication gap at the core shaft part.

Further, the gland is installed at the both ends of connecting rod, and the gland passes through end cover and the end connection of expansion bend is fixed for the expansion bend can follow the flexible removal of connecting rod and corresponding flexible, extrudees or expands damping fluid volume.

Further, the mandrel includes: the core shaft sleeve and the annular sleeve body are provided with an upper cover plate and a lower cover plate at two ends, and the upper cover plate and the lower cover plate are sleeved outside the middle part of the connecting rod in a penetrating way, so that the annular displacement of the connecting rod can be limited; the damping fluid communication gap is arranged on the core shaft sleeve; the upper cover plate is arranged at the upper end of the core shaft sleeve and is used for being connected with the tail part of the telescopic device of the upper group, and an upper deflector hole is formed in the surface of the upper cover plate; the lower cover plate is arranged at the lower end of the core shaft sleeve and is used for being connected with the tail parts of the retractors of the lower group, and a lower deflector hole is formed in the surface of the lower cover plate; the damping screw penetrates through the core shaft sleeve and is provided with a middle diversion hole, the middle diversion hole can be communicated with the upper diversion hole and the lower diversion hole to form a damping fluid communication gap, and damping fluid can be communicated with the sealing inner cavities of the upper telescopic device and the lower telescopic device through the mandrel.

Further, the damping fluid communication gap further includes: the gap between the mandrel and the connecting rod is 0.5-3 mm in width, the guide hole is a circular small hole, and the diameter of the small hole is 0.5-5 mm.

Further, a rib plate is arranged between the upper cover plate and the lower cover plate at the outer side of the mandrel sleeve.

Another structural form is as follows: the damping fluid intercommunication clearance sets up on the connecting rod, include: the communicating pipe is arranged inside the connecting rod and is used for communicating the communicating holes at the two ends of the connecting rod; the communicating holes are formed at two ends of the connecting rod and are respectively positioned in the sealed inner cavities in the two retractors and are used for being communicated between the communicating pipe and the sealed inner cavities in the retractors; the telescopic device can correspondingly stretch along with the stretching movement of the connecting rod, and the damping liquid in the sealed inner cavity is extruded or expanded to flow through the communicating hole and the communicating pipe, so that viscous damping is generated.

Further, the expansion device is a metal corrugated pipe.

Further, the metal corrugated pipe is further provided with a plurality of armor rings, and the armor rings are sequentially arranged on the periphery of the metal corrugated pipe and used for improving the bearing capacity of the metal corrugated pipe.

Further, a connecting lug is arranged at the outer end of the gland, and a joint bearing or a ball shaft is arranged on the connecting lug.

The working principle of the invention is introduced: according to the invention, through the sealing cavity formed between the telescopic device and the connecting rod and the telescopic movement of the connecting rod and the mandrel structure, the mutual flow transfer of the internal damping liquid is realized, and the damping effect is achieved. Meanwhile, as the expansion and contraction of the connecting rod are performed in the telescopic device, a sliding sealing structure is not needed, and the whole inner cavity structure is of an integral sealing structure, so that sliding sealing is not needed, and the problems of oil seepage and oil leakage of damping fluid in the sliding sealing are avoided. The invention has smart structure: the sleeve is used as a mounting carrier of the mandrel and a base of a telescopic space, a damping fluid cavity formed by the connecting rod and the telescopic device is mounted, the structure is simple and reliable, the damping fluid is communicated with a damping fluid communication gap of the mandrel area in the inner cavity to realize the flow of the damping fluid, a sliding sealing structure is not needed, and the structure is convenient to manufacture and assemble. By squeezing or expanding the viscous liquid in the telescopic device, a viscous damping effect is produced. Because the damping fluid is communicated with the circulation of the clearance, the damping fluid can flow through the whole system, so that the damping effect is more uniform and stable. The damping force of the viscous damper can be adjusted by adjusting the size of the damping fluid communication gap so as to adapt to different engineering requirements. Through the use of the bidirectional sealing and the metal corrugated pipe in multiple environments, the structural stability and the pressure bearing capacity of the damper are improved, and the damper can work under various working conditions.

The beneficial technical effects of the invention are as follows:

(1) And the maintenance cost is reduced: conventional dampers require periodic inspection and replacement of seals, and dampers that do not require sliding seals can avoid these maintenance tasks over the life of the building, reducing maintenance costs.

(2) Increasing reliability: oil leakage and oil spills are common damper problems that result in reduced damper performance and even complete failure. After the problems of oil seepage and oil leakage are solved, the reliability of the damper is greatly improved.

(3) Enhancing performance stability: oil leakage and oil leakage can result in a reduction in viscous fluid, thereby degrading the performance of the damper. The damper without sliding seal is not affected by the reduction of viscous fluid, can always provide stable damping effect, and enhances the performance stability of the system.

(4) Service life is prolonged: the oil seepage and the oil leakage can cause the failure and damage of the damper, and the service life is reduced. Dampers that do not require sliding seals do not suffer from these problems and can have a longer service life.

Drawings

FIG. 1 is a front view showing the structure of a sealless metallic viscous damper of embodiment 1;

FIG. 2 is a schematic diagram of the structure of a mandrel of a non-sealing metal viscous damper in example 1;

FIG. 3 is a front view showing the structure of a sealless metallic viscous damper of embodiment 2;

FIG. 4 is a schematic diagram showing a compression state structure of a viscous damper without sealing metal in embodiment 2;

fig. 5 is a schematic diagram showing the structure of the viscous damper in the stretched state without sealing metal in embodiment 2.

Detailed Description

The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.

Example 1: a sealless metallic viscous damper comprising the structure:

a sleeve 1 for mounting a mandrel 2 and accommodating a set of retractors 4; the bottom of the outer side of the sleeve 1 can be a hinge seat for installing and determining the place where the sealing-free metal viscous damper needs to be installed;

the mandrel 2 is arranged at the top of the sleeve 1 and is used as a channel shaft for providing telescopic displacement of the connecting rod 3, the mandrel 2 is a core structure of the sealless metal viscous damper, namely is used as a sliding channel for telescopic movement of the connecting rod 3, the limiting connecting rod 3 prevents the sliding movement of the connecting rod 3, and simultaneously, the telescopic devices 4 at two ends are arranged;

the connecting rod 3 passes through the mandrel 2, one end of the connecting rod is positioned in the sleeve 1, and the other end of the connecting rod is positioned outside the sleeve 1; as a movable part which is displaced after being stressed, the movable part can be stretched and contracted through the mandrel 2;

the telescopic device 4 is provided with two groups, which are respectively arranged at two sides of the mandrel 2, one group is arranged inside the sleeve 1, the other group is arranged outside the sleeve 1, the corresponding connecting rod 3 is wrapped, the end part of the telescopic device is fixed with the end of the connecting rod 3, a sealed inner cavity is formed between the telescopic device 4 and the connecting rod 3, and the telescopic device 4 can correspondingly stretch along with the stretching movement of the connecting rod 3;

the damping fluid communication gap is arranged on the mandrel 2 and used for communicating the two sealed inner cavities;

the damping liquid 5 is silicone oil and is sealed in the sealed inner cavities of the two groups of retractors 4, and the damping liquid is communicated with each other through a damping liquid communication gap at the position of the mandrel 2.

The basic structure of the sealless metal viscous damper can be obtained, and the basic function is realized.

Preferably, the two ends of the connecting rod 3 are provided with the pressing covers 41, and the pressing covers 41 are fixedly connected with the end parts of the retractors 4 through end covers, so that the retractors 4 can correspondingly retract along with the telescopic movement of the connecting rod 3, and the volume of the damping liquid 5 is extruded or expanded.

Preferably, the mandrel 2 comprises: the core shaft sleeve 21 and the annular sleeve body are provided with an upper cover plate 22 and a lower cover plate 23 at two ends, and the core shaft sleeve is sleeved outside the middle part of the connecting rod 3, so that the annular displacement of the connecting rod 3 can be limited; the damping fluid communication gap is arranged on the core shaft sleeve 21; the upper cover plate 22 is arranged at the upper end of the core shaft sleeve 21 and is used for being connected with the tail part of the upper group of retractors 4, and an upper diversion hole 25 is formed in the surface of the upper cover plate; the lower cover plate 23 is arranged at the lower end of the core shaft sleeve 21 and is used for being connected with the tail part of the telescopic device 4 of the lower group, and the surface of the lower cover plate is provided with a lower diversion hole 27; the damping screw 24 penetrates through the core shaft sleeve 21 and is provided with a middle diversion hole 26, the middle diversion hole 26 can be communicated with the upper diversion hole 25 and the lower diversion hole 27 to form a damping fluid communication gap, and the damping fluid 5 can be communicated with the sealed inner cavities of the upper telescopic device 4 and the lower telescopic device 4 through the core shaft 2. The damping fluid communication gap further includes: the gap between the mandrel 2 and the connecting rod 3 is 0.5-3 mm in width, the guide hole is a circular small hole, and the diameter of the small hole is 0.5-5 mm. And rib plates 28 are arranged between the upper cover plate 22 and the lower cover plate 23 outside the core shaft sleeve 21 and used for reinforcing the strength of the mandrel 2, so that the installation and the fixation are convenient. Preferably, there is also a stopper mounted on the connecting rod 3, which can prevent the stroke of the sealless metal viscous damper from exceeding the design maximum value. The outer end of the gland 41 is provided with a connecting lug 43, and the connecting lug 43 is provided with a joint bearing or a ball shaft, namely the other end of the sealing-free metal viscous damper is fixedly arranged.

When the damper works, damping fluid 5 flows in the mandrel 2 by means of expansion and contraction of the corrugated pipe, so that damping force is generated.

Example 2: another structural form

On the basis of example 1, the difference is that: the damping fluid communication gap is arranged on the connecting rod 3, and the connecting rod 3 is provided with different: the connecting rod 3 further includes: a communicating pipe 31 which is arranged inside the connecting rod 3 and is used for communicating the communicating holes 32 at two ends of the connecting rod 3; the communication holes 32 are formed at two ends of the connecting rod 3 and are respectively positioned in the sealed inner cavities in the two retractors 4 and are used for being communicated between the communication pipe 31 and the sealed inner cavities in the retractors 4; the telescopic device 4 can correspondingly stretch along with the stretching movement of the connecting rod 3, and the damping liquid 5 in the sealed inner cavity is extruded or expanded to flow through the communication opening 32 and the communication pipe 31, so that viscous damping is generated. The structure does not need to provide a gap and a diversion hole on the mandrel 2, is easier to realize the structural stability and the easy processing of the mandrel 2, has a small and flexible overall structure, and is suitable for a small-sized damper structure. Has the characteristics of small size, reliability, stability and high strength.

In this embodiment or the embodiment 1, the expansion joint 4 is a metal bellows or other material that can expand and contract and has a seal.

Preferably, in the solution of this embodiment or embodiment 1, the armouring ring 42 is sequentially installed around the metal bellows, so as to improve the bearing capacity of the metal bellows. The armoured ring 42 mounted on the corrugated compensator acts to bear more pressure on the pipe, thereby improving the pressure resistance and service life of the corrugated compensator.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.

Claims (9)

1. A sealless metallic viscous damper comprising:

a sleeve (1) for mounting the mandrel (2) and housing a set of retractors (4);

the mandrel (2) is arranged at the top of the sleeve (1) and is used as a channel shaft for providing telescopic displacement of the connecting rod (3);

the connecting rod (3) passes through the mandrel (2), one end of the connecting rod is positioned in the sleeve (1), and the other end of the connecting rod is positioned outside the sleeve (1);

the telescopic devices (4) are provided with two groups, are respectively arranged at two sides of the mandrel (2), one group is arranged inside the sleeve (1), the other group is arranged outside the sleeve (1), and are used for wrapping the corresponding connecting rods (3) and are fixed at the end parts and the end heads of the connecting rods (3), so that a sealed inner cavity is formed between the telescopic devices (4) and the connecting rods (3), and the telescopic devices (4) can correspondingly stretch along with the stretching movement of the connecting rods (3);

the damping fluid communication gap is arranged on the mandrel (2) or in the connecting rod (3) and is used for communicating the two sealed inner cavities;

damping fluid (5) is sealed in the sealed inner cavities of the two groups of retractors (4), and the damping fluid is communicated with each other through a damping liquid communication gap at the position of the mandrel (2).

2. The sealless metal viscous damper according to claim 1, wherein the two ends of the connecting rod (3) are provided with a gland (41), and the gland (41) is fixedly connected with the end of the telescopic device (4) through the end cover, so that the telescopic device (4) can correspondingly expand and contract along with the expansion and contraction movement of the connecting rod (3), and the volume of the damping liquid (5) is extruded or expanded.

3. The sealless metallic viscous damper according to claim 1, wherein the spindle (2) comprises:

the core shaft sleeve (21), the annular sleeve body, the upper cover plate (22) and the lower cover plate (23) are arranged at two ends of the annular sleeve body, and the annular sleeve body is sleeved outside the middle part of the connecting rod (3) in a penetrating manner, so that the annular displacement of the connecting rod (3) can be limited;

the damping fluid communication gap is arranged on the mandrel sleeve (21);

an upper cover plate (22) which is arranged at the upper end of the core shaft sleeve (21) and is used for being connected with the tail part of the upper group of retractors (4), and an upper diversion hole (25) is formed on the surface of the upper cover plate;

the lower cover plate (23) is arranged at the lower end of the core shaft sleeve (21) and is used for being connected with the tail part of the telescopic device (4) of the lower group, and a lower diversion hole (27) is formed in the surface of the lower cover plate;

damping screw (24), pass core sleeve (21), be equipped with well water conservancy diversion hole (26), well water conservancy diversion hole (26) can communicate go up water conservancy diversion hole (25) and lower water conservancy diversion hole (27), constitute damping fluid intercommunication clearance, can make damping fluid (5) can pass through the sealed inner chamber of dabber (2) intercommunication upper and lower expansion bend (4).

4. A sealless metallic viscous damper as recited in claim 3, wherein the damping fluid communication gap further comprises: the gap between the mandrel (2) and the connecting rod (3) is 0.5-3 mm in width, the diversion hole is a round small hole, and the diameter of the small hole is 0.5-5 mm.

5. A sealless metallic viscous damper according to claim 3, wherein a rib (28) is provided between the upper cover plate (22) and the lower cover plate (23) outside the spindle sleeve (21).

6. The sealless metallic viscous damper of claim 1, wherein the damping fluid communication gap is provided on a connecting rod (3) comprising:

a communicating pipe (31) which is arranged inside the connecting rod (3) and is used for communicating the communicating holes (32) at the two ends of the connecting rod (3);

the communication opening (32) is arranged at two ends of the connecting rod (3) and is respectively positioned in the sealed inner cavities in the two retractors (4) and is used for being communicated between the communication pipe (31) and the sealed inner cavities in the retractors (4);

the telescopic device can enable the telescopic device (4) to correspondingly stretch along with the stretching movement of the connecting rod (3), and squeeze or expand damping liquid (5) in the sealed inner cavity to enable the damping liquid to flow through the communication opening (32) and the communication pipe (31) so as to generate viscous damping.

7. A sealless metallic viscous damper according to any of claims 1-6, characterized in that the telescopic (4) is a metallic bellows.

8. The sealless metallic viscous damper of claim 7, further comprising a plurality of armor rings (42), the armor rings (42) being sequentially mounted around the metallic bellows for increasing the pressure bearing capacity of the metallic bellows.

9. The sealless metallic viscous damper according to claim 1, wherein a connecting lug (43) is mounted on the outer end of the gland (41), the connecting lug (43) being mounted with a knuckle bearing or ball spindle.