CN213511839U - Air spring based on star seal - Google Patents
Air spring based on star seal Download PDFInfo
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- CN213511839U CN213511839U CN202022051041.7U CN202022051041U CN213511839U CN 213511839 U CN213511839 U CN 213511839U CN 202022051041 U CN202022051041 U CN 202022051041U CN 213511839 U CN213511839 U CN 213511839U
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- guide block
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Abstract
The utility model relates to the technical field of air springs, in particular to an air spring based on star-shaped seal, which comprises a cylinder barrel, a piston rod, a guide block and a piston, wherein one end of the piston rod is provided with the piston which can slide along the inner wall of the cylinder barrel, the other end of the piston rod extends out of the cylinder barrel, one end of the cylinder barrel extending out of the piston rod is provided with the guide block, the inner wall of the guide block is provided with an annular groove for installing a seal ring, the seal ring adopts a star-shaped seal ring with arc concave surfaces at the side edges, four lips are arranged around the seal ring, the arc concave surface is arranged between the adjacent lips, the lips are all abutted against the inner wall of the groove, through the research on the sealing element of the air spring for vehicles, the star-shaped seal ring has obvious effect when the oil leakage and the air, the assembly and installation process is simple, and the sealing effect is good.
Description
Technical Field
The utility model belongs to the technical field of the air spring technique and specifically relates to an air spring based on star type is sealed.
Background
The gas spring is a part capable of realizing functions of supporting, buffering, braking, height and angle adjustment and the like, and is mainly applied to parts such as a cover cap, a door and the like in engineering machinery. The gas spring principle is that inert gas or oil-gas mixture is filled in a closed pressure cylinder, so that the pressure in a cavity is several times or dozens of times higher than the atmospheric pressure, and the movement of a piston rod is realized by utilizing the pressure difference generated by the fact that the cross section area of the piston rod is smaller than that of the piston. Due to the fundamental difference in principle, the gas spring has the remarkable advantages of relatively slow speed, small dynamic force change (generally within 1: 1.2) and easiness in control over a common spring. The device comprises a pressure cylinder, a piston rod, a piston, a sealing guide sleeve, a filler (inert gas or oil-gas mixture), an in-cylinder control element, an out-cylinder control element (a controllable gas spring), a joint and the like. At present, the gas spring sealing oil gas used in the market has poor effect, oil and gas leakage is easy, the gas spring with high sealing performance cannot be normally used, the abrasion of internal parts of the gas spring is increased, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
In order to overcome the poor not enough of current air spring seal effect, the utility model provides an air spring based on star type is sealed increases one star type at air spring front end direction position and seals, strengthens the sealed effect of air spring.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an air spring based on star type is sealed, includes cylinder, piston rod, guide block and piston, and piston rod one end is provided with the piston that can follow the cylinder inner wall and slide, and the cylinder is stretched out to the piston rod other end, and the cylinder one end that the piston rod stretched out is provided with the guide block, and the annular slot that is used for installing the sealing washer is offered to the inner wall of guide block, and the sealing washer adopts the side to be the star type sealing washer of arc concave surface.
Furthermore, four lips are arranged around the sealing ring, and an arc-shaped concave surface is arranged between every two adjacent lips.
Furthermore, the lips are all abutted against the inner wall of the groove.
Furthermore, the lip and the arc-shaped concave surface form an included angle of 120-150 degrees.
Further, the radian of the arc-shaped concave surface is 60-90 degrees.
The beneficial effects of the utility model are that, through the research discovery to automobile-used air spring sealing member, star type sealing washer has apparent effect when improving air spring oil leak gas leakage, and when batch production used, can directly purchase the star type sealing washer of suitable material and hardness according to the specification of air spring piston rod and guide block, can mould plastics through the injection molding machine and obtain the guide block of taking the slot, and the slot size can directly acquire according to the standard, and assembly installation simple process, and sealed effect is good.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic cross-sectional view of the present invention.
In the figure, 1, a cylinder barrel, 2, a piston rod, 3, a guide block, 4, a piston, 5, a sealing ring, 6, an arc concave surface and 7, a lip are arranged.
Detailed Description
As shown in fig. 1 and 2, an air spring based on star type sealing comprises a cylinder barrel 1, a piston rod 2, a guide block 3 and a piston 4, wherein one end of the piston rod 2 is provided with the piston 4 capable of sliding along the inner wall of the cylinder barrel 1, the other end of the piston rod 2 extends out of the cylinder barrel 1, one end of the cylinder barrel 1, which extends out of the piston rod 2, is provided with the guide block 3, the inner wall of the guide block 3 is provided with an annular groove for installing a sealing ring 5, and the sealing ring 5 adopts a star type sealing ring with side.
Four lips 7 are arranged around the sealing ring 5, and an arc concave surface 6 is arranged between the adjacent lips 7. The lips 7 are all abutted against the inner wall of the groove. The lip 7 and the arc concave surface 6 form an included angle of 120-150 degrees. The radian of the arc-shaped concave surface 6 is 60-90 degrees.
The sealing ring 5 is fixedly abutted to the groove on the inner wall of the guide block 3 through the lips 7 on the four corners, the lips 7 and the arc concave surfaces 6 with included angles of 120-150 degrees and the arc concave surfaces 6 with included angles of 60-90 degrees are beneficial to keeping the pressure resistance of the lips 7 to the maximum extent and can be arranged according to the use requirement,
the sealing ring 5 is a seamless ring sealed by four lips, is vulcanized and molded in a mold, has a square section, has higher sealing performance than the common sealing ring model structure, is made of various synthetic rubbers and achieves the sealing effect through the contact stress of a sealing interface. When the sealing pressure is increased, the compression amount of the star-shaped sealing ring is relatively increased, and the contact stress and the contact area are enlarged. The star-shaped rubber sealing ring has the following working principle: the star-shaped sealing ring is a double-acting sealing element with elastic sealing performance, radial or axial contact stress is generated by pre-compression during initial installation and is superposed with system pressure to realize a sealing function, the superposed sealing force is increased along with the increase of the system pressure, and under the action of the pressure, the star-shaped sealing ring can uniformly transmit the received pressure to each surface like fluid with high surface tension.
The star-shaped sealing ring has the following advantages: the star-shaped sealing ring is provided with a four-petal arc concave surface 6, the double sealing surface is kept, and the effective sealing function can be kept only by less extrusion in the double sealing action; by reducing extrusion, friction can be reduced and seal life extended; when the piston rod reciprocates, the star-shaped ring is arranged in the groove, so that the star-shaped ring cannot be turned and twisted, and the use of the sealing ring is ensured; the special profile has an excellent sealing efficiency, and the starting efficiency of the gas spring is also increased by means of the lubricant reservoir formed between the sealing lips.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides an air spring based on star type is sealed, which is characterized by, including cylinder (1), piston rod (2), guide block (3) and piston (4), piston rod (2) one end is provided with piston (4) that can follow cylinder (1) inner wall and slide, cylinder (1) is stretched out to the piston rod (2) other end, cylinder (1) one end that piston rod (2) stretched out is provided with guide block (3), the annular groove that is used for installing sealing washer (5) is seted up to the inner wall of guide block (3), sealing washer (5) adopt the side to be the star type sealing washer of arc concave surface (6).
2. A gas spring based on a star-shaped seal according to claim 1, characterized in that four lips (7) are arranged around the sealing ring (5), and an arc-shaped concave surface (6) is arranged between adjacent lips (7).
3. A gas spring based on a star-shaped seal according to claim 2, characterized in that the lips (7) are each arranged against the inner wall of the groove.
4. A gas spring based on a star-shaped seal according to claim 2, characterized in that said lip (7) forms an angle of 120-150 ° with the curved concave surface (6).
5. A gas spring based on a star-shaped seal according to claim 1, characterized in that the arc of the arc-shaped concave surface (6) is 60 ° -90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022051041.7U CN213511839U (en) | 2020-09-18 | 2020-09-18 | Air spring based on star seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022051041.7U CN213511839U (en) | 2020-09-18 | 2020-09-18 | Air spring based on star seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213511839U true CN213511839U (en) | 2021-06-22 |
Family
ID=76447800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022051041.7U Active CN213511839U (en) | 2020-09-18 | 2020-09-18 | Air spring based on star seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213511839U (en) |
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2020
- 2020-09-18 CN CN202022051041.7U patent/CN213511839U/en active Active
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