CN211574129U - Internal pressure self-adjusting viscous damper - Google Patents
Internal pressure self-adjusting viscous damper Download PDFInfo
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- CN211574129U CN211574129U CN201921964900.2U CN201921964900U CN211574129U CN 211574129 U CN211574129 U CN 211574129U CN 201921964900 U CN201921964900 U CN 201921964900U CN 211574129 U CN211574129 U CN 211574129U
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- viscous damper
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Abstract
The utility model discloses an internal pressure self-adjusting viscous damper, which comprises a cylinder body, a piston and a piston rod; the piston divides the cylinder into a first medium space and a second medium space; the piston is provided with a damping channel which is communicated with the first medium space and the second medium space; two ends of the cylinder body are provided with guide sealing mechanisms; a pressure adjusting structure is arranged in the guide sealing mechanism; the pressure regulating structure comprises an oil storage chamber, a pressure valve and an elastic body; when the pressure in the cylinder body is overlarge, the damping medium flows to the oil storage chamber from the cylinder body; when the damping medium in the cylinder body is vacant, the damping medium flows to the cylinder body from the oil storage chamber; the automatic adjustment function for different internal pressures is realized, the safety of the viscous damper in the operation process can be greatly improved, and the product performance of the viscous damper at different external temperatures can be ensured.
Description
Technical Field
The utility model belongs to the technical field of the attenuator and specifically relates to an interior pressure self-interacting viscous damper.
Background
Viscous dampers are used as a good energy-consuming and shock-absorbing (vibration) structural member and are initially applied to mechanical, vehicular, aerospace and military engineering. The composite material is widely applied to the fields of seismic fortification such as buildings, bridges and the like in the 70 s to resist the vibration caused by earthquake, wind vibration or other external loads, and achieves good effect.
In the working process of the viscous damper, external input energy is converted into heat energy, a large amount of heat is generated, and the temperature of the damper is greatly increased. The damping medium is usually high-viscosity dimethyl silicone oil, and the specific heat capacity and the thermal expansion coefficient of the silicone oil are small. The volume expansion of the silicon oil is generated due to the temperature rise, and the silicon oil is sealed in the cylinder body, so that the internal pressure of the cylinder barrel is increased rapidly, the cylinder barrel is deformed and expanded, and the performance of the damper is affected.
In addition, the volume of the damping medium in the viscous damper changes along with the change of the external temperature. When the outside temperature is reduced, the volume of the damping medium is reduced, the damping medium which is originally filled in the cylinder body is vacant, the viscous damper cannot generate damping force when the displacement is small, and the damper loses effect.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problem that prior art exists, the utility model provides an interior pressure self-interacting viscous damper can carry out automatically regulated when internal pressure is too big, improves the security of viscous damper operation in-process greatly, can guarantee its stable product performance under different ambient temperature again.
The technical scheme is as follows: in order to achieve the above purpose, the utility model can adopt the following technical proposal:
an internal pressure self-adjusting viscous damper comprises a cylinder body, a piston and a piston rod; the piston is arranged in the cylinder body and positioned in the middle of the piston rod, the cylinder body is divided into a first medium space and a second medium space by the piston, and a damping channel communicated with the first medium space and the second medium space is arranged on the piston; the piston rod drives the piston to reciprocate in the cylinder body, and damping media in the first medium space and the second medium space are compressed to flow through the damping channel to generate damping force;
two ends of the cylinder body are provided with guide sealing mechanisms; a pressure adjusting structure is arranged in the guide sealing mechanism; the pressure adjusting structure comprises an oil storage chamber and a pressure valve which are arranged in the guide sealing mechanism, and the pressure valve is arranged at the front end of the oil storage chamber; an elastic body is arranged in the oil storage chamber.
The front end and the rear end in the cylinder body are respectively and fixedly provided with a front guide sleeve and a rear guide sleeve; sealing elements are arranged on the inner walls of the front guide sleeve and the rear guide sleeve; the sealing element realizes the sealing between the front guide sleeve and the cylinder body or between the rear guide sleeve and the piston rod, and a guide sealing mechanism is formed. The cylinder body, the front guide sleeve, the rear guide sleeve and the piston rod form a closed space which is filled with damping medium; the cylinder body and the guide sleeve, and the guide sleeve and the piston rod are sealed by sealing elements, so that the damping medium is limited in the closed space without leakage in the motion process of the viscous damper.
Furthermore, the front end of the front guide sleeve is abutted with a front end cover, and the front end cover is fixed on the inner wall of the cylinder body and fixes the front guide sleeve at the front end of the cylinder body.
Furthermore, an auxiliary cylinder is abutted to the rear end of the rear guide sleeve and fixed to the inner wall of the cylinder body, and the rear guide sleeve is fixed to the rear end of the cylinder body.
More preferably, the two damping channels are parallel to the piston rod and are respectively arranged on the upper side and the lower side of the piston rod.
Furthermore, the front end of the piston rod is provided with a front ear ring; the rear end of the auxiliary cylinder is provided with a rear earring.
The elastomer is a polyurethane material; has high elasticity and compressibility.
The pressure valve is a one-way overflow valve, the flow direction of the damping medium in the cylinder body to the oil storage chamber needs to exceed the set pressure, and on the contrary, the flow direction of the damping medium in the oil storage chamber to the cylinder body does not need the pressure.
The pressure valve sets a pressure limit value according to the use requirement of the viscous damper; when the viscous damper works normally, the pressure valve is closed, and the damping medium can only flow in the closed space at the two sides of the piston; when the temperature of the damping medium rises, the volume expansion product has extra expansion pressure, or the viscous damper meets the limit working state such as super-large vibration, the internal pressure of the viscous damper exceeds the pressure limit, the pressure valve is opened, the damping medium flows to the oil storage chamber, and the pressure is released; when the viscous damper returns to normal, the damping medium in the oil storage chamber flows into the cylinder again. The oil storage chamber is filled with a certain amount of damping medium in advance, and the elastic body has a certain compression amount initially. When the external temperature is reduced, the volume of the damping medium is reduced, the cylinder body cannot be filled with the damping medium, and the damping medium filled in the oil storage chamber in advance flows to the cylinder body, so that the cylinder body is always filled with the damping medium, and the performance of the damper under small displacement is ensured.
Has the advantages that: the utility model has the advantages of it is following: when the pressure in the cylinder body is overlarge, the damping medium flows to the oil storage chamber from the cylinder body; when the damping medium in the cylinder body is vacant, the damping medium flows to the cylinder body from the oil storage chamber; the automatic adjustment function for different internal pressures is realized, the safety of the viscous damper in the operation process can be greatly improved, and the product performance of the viscous damper at different external temperatures can be ensured.
Drawings
Fig. 1 is a schematic structural view of the internal pressure self-adjusting viscous damper of the present invention.
Detailed Description
Referring to fig. 1, the utility model discloses an internal pressure self-adjusting viscous damper, which comprises a cylinder 1, a piston 2 and a piston rod 3; the piston 2 is arranged in the cylinder body 1 and positioned in the middle of the piston rod 3, the cylinder body 1 is divided into a first medium space 11 and a second medium space 12 by the piston 2, and a damping channel 21 communicated with the first medium space 11 and the second medium space 12 is arranged on the piston 2; the two damping channels 21 are parallel to the piston rod 3 and are respectively arranged on the upper side and the lower side of the piston rod 3. The piston rod 3 drives the piston 2 to reciprocate in the cylinder body 1, and damping media in the first medium space 11 and the second medium space 12 are compressed to flow through the damping channel 21 to generate damping force;
two ends of the cylinder body 1 are provided with guide sealing mechanisms; the front end and the rear end in the cylinder body 1 are respectively and fixedly provided with a front guide sleeve 41 and a rear guide sleeve 42; the inner walls of the two guide sleeves are provided with sealing pieces 43; the sealing piece 43 realizes the sealing between the front guide sleeve 41 and the rear guide sleeve 42 and the cylinder body 1 or between the piston rods 3 to form a guide sealing mechanism 4; the cylinder body 1, the front guide sleeve, the rear guide sleeve and the piston rod 3 form a closed space, and the closed space is filled with damping media; the cylinder body 1 and the guide sleeve, and the guide sleeve and the piston rod 3 are sealed by the sealing element 43, so that the damping medium is limited in the closed space and cannot leak in the motion process of the viscous damper.
The front end of the front guide sleeve 41 is abutted with a front end cover 6, and the front end cover 6 is fixed on the inner wall of the cylinder body 1 and fixes the front guide sleeve 41 at the front end of the cylinder body 1. The rear end of the rear guide sleeve 42 is abutted with an auxiliary cylinder 7, and the auxiliary cylinder 7 is fixed on the inner wall of the cylinder body 1 and fixes the rear guide sleeve 42 at the rear end of the cylinder body 1. The front end of the piston rod 3 is provided with a front ear ring 8; the rear end of the auxiliary cylinder 7 is provided with a rear earring 9.
A pressure adjusting structure is arranged in the guide sealing mechanism; the pressure regulating structure comprises an oil storage chamber 51 and a pressure valve 52 which are arranged in the guide sealing mechanism, and the pressure valve 52 is arranged at the front end of the oil storage chamber 51; an elastic body 53 is provided in the oil reservoir chamber 51. The elastomer 53 is a polyurethane material; the material has high elasticity and compressibility; the pressure valve 52 is a one-way relief valve, and the flow of the damping medium in the cylinder to the oil storage chamber needs to exceed a set pressure, whereas the flow of the damping medium in the oil storage chamber to the cylinder does not need a pressure.
The working principle is as follows:
the pressure valve sets a pressure limit value according to the use requirement of the viscous damper; when the viscous damper works normally, the pressure valve is closed, and the damping medium can only flow in the closed space at the two sides of the piston; when the temperature of the damping medium rises, the volume expansion product has extra expansion pressure, or the viscous damper meets the limit working state such as super-large vibration, the internal pressure of the viscous damper exceeds the pressure limit, the pressure valve is opened, the damping medium flows to the oil storage chamber, and the pressure is released; when the viscous damper returns to normal, the damping medium in the oil storage chamber flows into the cylinder again.
The oil storage chamber is filled with a certain amount of damping medium in advance, and the elastic body has a certain compression amount initially. When the external temperature is reduced, the volume of the damping medium is reduced, the cylinder body cannot be filled with the damping medium, and the damping medium filled in the oil storage chamber in advance flows to the cylinder body, so that the cylinder body is always filled with the damping medium, and the performance of the damper under small displacement is ensured. When the external temperature is reduced, the volume of the damping medium is reduced, the cylinder body cannot be filled with the damping medium, and the damping medium filled in the oil storage chamber in advance flows to the cylinder body, so that the cylinder body is always filled with the damping medium, and the performance of the damper under small displacement is ensured.
Claims (8)
1. An internal pressure self-adjusting viscous damper comprises a cylinder body (1), a piston (2) and a piston rod (3); piston (2) are located cylinder body (1) and are located the middle part of piston rod (3), and piston (2) divide into first medium space (11) and second medium space (12), its characterized in that with cylinder body (1): a damping channel (21) which is communicated with the first medium space (11) and the second medium space (12) is arranged on the piston (2); the piston rod (3) drives the piston (2) to reciprocate in the cylinder body (1) to compress damping media in the first medium space (11) and the second medium space (12) to flow through the damping channel (21) to generate damping force;
two ends of the cylinder body (1) are provided with guide sealing mechanisms; a pressure adjusting structure is arranged in the guide sealing mechanism; the pressure adjusting structure comprises an oil storage chamber (51) and a pressure valve (52) which are arranged in the guide sealing mechanism, and the pressure valve (52) is arranged at the front end of the oil storage chamber (51) and communicated with the cylinder body (1); an elastic body (53) is provided in the oil reservoir (51).
2. The internal pressure self-adjusting viscous damper of claim 1, wherein: the front end and the rear end in the cylinder body (1) are respectively and fixedly provided with a front guide sleeve (41) and a rear guide sleeve (42); sealing elements (43) are arranged on the inner walls of the front guide sleeve (41) and the rear guide sleeve (42); the sealing piece (43) realizes the sealing between the front guide sleeve (41) and the rear guide sleeve (42) and the cylinder body (1) or between the piston rods (3) to form a guide sealing mechanism (4).
3. The internal pressure self-adjusting viscous damper of claim 2, wherein: the front end of the front guide sleeve (41) is abutted with a front end cover (6), and the front end cover (6) is fixed on the inner wall of the cylinder body (1) and fixes the front guide sleeve (41) at the front end of the cylinder body (1).
4. The internal pressure self-adjusting viscous damper of claim 2, wherein: the rear end of the rear guide sleeve (42) is abutted with an auxiliary cylinder (7), and the auxiliary cylinder (7) is fixed on the inner wall of the cylinder body (1) and fixes the rear guide sleeve (42) at the rear end of the cylinder body (1).
5. The internal pressure self-adjusting viscous damper of claim 1, wherein: the two damping channels (21) are parallel to the piston rod (3) and are respectively arranged on the upper side and the lower side of the piston rod (3).
6. The internal pressure self-adjusting viscous damper of claim 4, wherein: the front end of the piston rod (3) is provided with a front ear ring (8); the rear end of the auxiliary cylinder (7) is provided with a rear earring (9).
7. The internal pressure self-adjusting viscous damper of claim 1, wherein: the elastomer (53) is a polyurethane material.
8. The internal pressure self-adjusting viscous damper of claim 1, wherein: the pressure valve (52) is a one-way overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921964900.2U CN211574129U (en) | 2019-11-14 | 2019-11-14 | Internal pressure self-adjusting viscous damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921964900.2U CN211574129U (en) | 2019-11-14 | 2019-11-14 | Internal pressure self-adjusting viscous damper |
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| CN211574129U true CN211574129U (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921964900.2U Active CN211574129U (en) | 2019-11-14 | 2019-11-14 | Internal pressure self-adjusting viscous damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922931A (en) * | 2022-06-30 | 2022-08-19 | 上海蓝科建筑减震科技股份有限公司 | Damping coefficient adjustable double-order viscous damper |
-
2019
- 2019-11-14 CN CN201921964900.2U patent/CN211574129U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922931A (en) * | 2022-06-30 | 2022-08-19 | 上海蓝科建筑减震科技股份有限公司 | Damping coefficient adjustable double-order viscous damper |
| CN114922931B (en) * | 2022-06-30 | 2024-03-19 | 上海蓝科建筑减震科技股份有限公司 | Double-order viscous damper with adjustable damping coefficient |
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