Piston sealing element

Abstract

The utility model relates to a piston sealing element in the technical field of sealing elements, a telescopic piston rod is arranged in a cylinder cavity of an oil cylinder, a first sealing ring for sealing the oil cylinder is arranged on the inner wall of the oil cylinder, and a second sealing ring for fixing the first sealing ring is arranged on the outer side of the first sealing ring; a sealing assembly used for sealing the piston rod is arranged on the inner side of the first sealing ring, and a fixing assembly used for being clamped to the second sealing ring is arranged on the outer side of the first sealing ring. When the second sealing ring and the second sealing ring need to be installed, the second sealing ring can be clamped in the sealing groove firstly, then the sealing ring with the first arc-shaped clamping strip and the second arc-shaped clamping strip is close to the second sealing ring in sequence, and the first sealing ring can be clamped on the second sealing ring through wrapping of the first arc-shaped clamping strip and the second arc-shaped clamping strip. And due to the arrangement of the first arc-shaped clamping strip and the second arc-shaped clamping strip, double-sealing isolation can be formed.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing components, in particular to a piston sealing component. Background Art

[0002] Piston seals generally use two sealing rings to cooperate with each other to achieve a sealing effect. The selection of sealing ring materials is of great significance to its sealing performance and service life. The performance of the material directly affects the performance of the sealing ring. Piston seals are often used in oil cylinders. However, the existing piston seals are prone to sliding between the two sealing rings to form a trapped pressure, which causes the sealing ring to fall out of the groove on the piston.

[0003] For example, a piston seal with Chinese patent application number CN201120430372.X includes a seal body made of hard polyurethane material and a sealing component made of soft polyurethane material arranged on the seal body, wherein the seal body includes an annular body, which is tightly attached to the annular groove of the piston, and the sealing component includes a sealing part, which is arranged on the upper part of the annular body, and part of the sealing part extends out of the annular groove. It has the following technical defects:

[0004] When the piston rod extends and retracts in the cylinder, two sealing rings will be used to form a seal between the piston rod and the cylinder. Since the two sealing rings are independent of each other and lack a locking device, it is easy for the outer sealing ring to fall off. In addition, the sealing ring is only sealed on one side, which can easily cause the hydraulic oil in the cylinder to overflow along the direction of movement of the piston rod. Utility Model Content

[0005] In order to solve the problem that when the piston rod is extended and retracted in the oil cylinder, two sealing rings are used to form a seal between the piston rod and the oil cylinder. Since the two sealing rings are independent of each other and lack a clamping device, it is easy to cause the outer sealing ring to fall off. In addition, the sealing ring is only sealed on one side, which easily causes the hydraulic oil in the oil cylinder to overflow along the direction of movement of the piston rod. The utility model provides the following technical solutions:

[0006] A piston seal comprises a sealing ring 1 arranged on the inner wall of an oil cylinder for sealing the oil cylinder, a piston rod for extension and retraction is arranged in the cylinder cavity of the oil cylinder, and a sealing ring 2 for fixing the sealing ring 1 is arranged outside the sealing ring 1;

[0007] A sealing component for sealing the piston rod inside the oil cylinder is arranged on the inner side of the sealing ring 1, and a fixing component for engaging with the sealing ring 2 is arranged on the outer side of the sealing ring 1, and there are two sealing rings 1, and the two sealing rings 1 are linearly arrayed on the inner wall of the oil cylinder; a sealing ring 2 for fixing the sealing ring 1 is arranged on the outer side of the sealing ring 1, and there are two sealing rings 2, and the two sealing rings 2 are linearly arrayed on the inner wall of the oil cylinder, and the two sealing rings 2 are located on the inner sides of the two sealing rings 1.

[0008] A sealing component for sealing the piston rod is arranged on the inner side of the sealing ring 1, and a fixing component for engaging with the sealing ring 2 is arranged on the outer side of the sealing ring 1. When the sealing ring 1 needs to be installed, the sealing ring 2 can be firstly engaged in the sealing groove, and then the fixing component can be engaged with the sealing ring 2, so that the movement of the piston can be utilized.

[0009] Furthermore, the sealing assembly includes a sealing gasket arranged on the top of a sealing ring, and there are two sealing gaskets, which are symmetrically distributed at the upper and lower ends of the sealing ring to better control the movement of the piston rod in the cylinder; a groove is provided in the middle inner side of the sealing gasket to facilitate double sealing of the piston rod, and a groove is provided in the middle inner side of the sealing gasket to facilitate double sealing of the piston rod, and the groove can divide the sealing gasket into sealing strips to form double sealing isolation, so as to reduce the problem of hydraulic oil overflow in the cylinder when the piston rod moves.

[0010] Furthermore, the fixing component includes an arc-shaped clip strip 1 arranged on the outer side of the sealing ring 1 for clamping on the sealing ring 2, and the arc-shaped clip strip 1 is clamped on the sealing ring 2 in an arc shape, so that the sealing ring 1 can be clamped on the sealing ring 2 by wrapping the arc-shaped clip strip 1 and the arc-shaped clip strip 2, thereby preventing the sealing ring 1 and the sealing ring 2 from sliding and causing the sealing ring 1 to fall off.

[0011] Furthermore, the bottom end of the arc-shaped clip one is provided with an arc-shaped clip two for cooperating with the arc-shaped clip one to engage with the sealing ring two, and the shape and size of the arc-shaped clip two are the same as the shape and size of the arc-shaped clip one. When the sealing ring two and the sealing ring two need to be installed, the sealing ring two can be firstly engaged in the sealing groove, and then the sealing ring one with the arc-shaped clip one and the arc-shaped clip two are brought close to the sealing ring two in sequence, and by wrapping the arc-shaped clip one and the arc-shaped clip two, the sealing ring one can be engaged with the sealing ring two, thereby further preventing the sealing ring one from falling off.

[0012] Furthermore, a sealing groove is provided on the inner wall of the oil cylinder to facilitate the installation of sealing ring one, and there are two sealing grooves, which are distributed in a linear array on the inner wall of the oil cylinder, and sealing ring two and sealing ring two can be installed in the sealing grooves in sequence by tools, so that the piston rod can move up and down in the oil cylinder, which is beneficial to the movement of the piston rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By setting up a sealing component and a fixing component, when the sealing ring 1 and the sealing ring 2 need to be installed, the sealing ring 2 can be first clamped in the sealing groove, and then the sealing ring 1 with the arc clamping strip 1 and the arc clamping strip 2 can be brought close to the sealing ring 2 in sequence, and the sealing ring 1 can be clamped on the sealing ring 2 by wrapping the arc clamping strip 1 and the arc clamping strip 2, so as to further prevent the sealing ring 1 from falling off. The setting of the arc clamping strip 1 and the arc clamping strip 2 can form a double sealing isolation to reduce the problem of hydraulic oil overflow in the cylinder when the piston rod moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the oil cylinder of the utility model;

[0017] Figure 3 This is a front cross-sectional view of the oil cylinder of the utility model;

[0018] Figure 4 This is a structural schematic diagram of a sealing ring of the utility model;

[0019] Figure 5 This is a diagram showing the matching of the sealing component and the fixing component of the utility model.

[0020] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0021] 100-oil cylinder, 101-sealing groove;

[0022] 200-piston rod;

[0023] 300 - sealing ring 1, 310 - sealing assembly, 311 - sealing pad, 312 - groove, 320 - fixing assembly, 321 - arc-shaped clip 1, 322 - arc-shaped clip 2;

[0024] 400-Seal ring 2. DETAILED DESCRIPTION

[0025] The preferred specific implementation methods for implementing the present utility model are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

[0026] See also Figure 1-Figure 5 , the utility model provides a piston seal.

[0027] Piston seals generally use two sealing rings to cooperate with each other to achieve a sealing effect. The selection of sealing ring materials is of great significance to its sealing performance and service life. The performance of the material directly affects the performance of the sealing ring. Piston seals are often used in oil cylinders. The existing piston seal is easy to make the two sealing rings slide against each other to form trapped pressure during use, which causes the sealing ring to fall out of the groove on the piston; therefore, it is necessary to improve it, which includes a sealing ring 300 arranged on the inner wall of the oil cylinder 100 to seal the oil cylinder 100, a piston rod 200 for telescopic operation is arranged in the cylinder cavity of the oil cylinder 100, a sealing ring 300 for sealing is inlaid on the inner wall of the oil cylinder 100, and there are two sealing rings 300, and the two sealing rings 300 are linearly arranged on the inner wall of the oil cylinder 100; a sealing ring 400 for fixing the sealing ring 300 is arranged on the outer side of the sealing ring 300, and there are two sealing rings 400, and the two sealing rings 400 are linearly arranged on the inner wall of the oil cylinder 100, and the two sealing rings 400 are located on the inner side of the two sealing rings 300;

[0028] A sealing groove 101 is provided on the inner wall of the oil cylinder 100 for facilitating the installation of the sealing ring 1 300, and there are two sealing grooves 101, which are distributed on the inner wall of the oil cylinder 100 in a linear array, and the sealing ring 2 400 and the sealing ring 2 300 can be installed in the sealing groove 101 in sequence by tools, so that the piston rod 200 can move up and down in the oil cylinder 100, which is beneficial to the movement of the piston rod 200;

[0029] A sealing assembly 310 for sealing the piston rod 200 is disposed on the inner side of the sealing ring 300, and a fixing assembly 320 for engaging with the sealing ring 400 is disposed on the outer side of the sealing ring 300, so that when the sealing ring 300 needs to be installed, the sealing ring 400 can be firstly engaged in the sealing groove 101, and then the fixing assembly 320 can be engaged with the sealing ring 400, so that the movement of the piston 200 can be utilized;

[0030] The sealing assembly 310 includes a sealing pad 311 disposed on the top of the sealing ring 1 300, and there are two sealing pads 311, which are symmetrically distributed at the upper and lower ends of the sealing ring 1 300, so as to better control the movement of the piston rod 200 in the oil cylinder 100; a groove 312 is provided in the middle of the inner side of the sealing pad 311 to facilitate double sealing of the piston rod 200;

[0031] The fixing assembly 320 includes an arc-shaped clamping strip 1 321 disposed on the outer side of the sealing ring 1 300 for clamping on the sealing ring 2 400, and the arc-shaped clamping strip 1 321 is clamped on the sealing ring 2 400 in an arc shape, so that the sealing ring 1 300 is clamped on the sealing ring 2 400 by wrapping the arc-shaped clamping strip 1 321 and the arc-shaped clamping strip 2 322, thereby preventing the sealing ring 1 300 and the sealing ring 2 400 from sliding and causing the sealing ring 1 300 to fall off;

[0032] The bottom end of the arc clamping strip 1 321 is provided with an arc clamping strip 2 322 for cooperating with the arc clamping strip 1 321 to clamp the sealing ring 1 300 on the sealing ring 2 400, and the shape and size of the arc clamping strip 2 322 are the same as those of the arc clamping strip 1 321; therefore, when the sealing ring 2 400 and the sealing ring 2 300 need to be installed, the sealing ring 2 400 can be first clamped in the sealing groove 101, and then the sealing ring 1 300 with the arc clamping strip 1 322 can be clamped in the sealing groove 101. 1 and the arc-shaped clamping strip 2 322 are sequentially brought close to the sealing ring 2 400, and the sealing ring 300 can be clamped on the sealing ring 2 400 by wrapping the arc-shaped clamping strip 1 321 and the arc-shaped clamping strip 2 322, so as to further prevent the sealing ring 1 300 from falling off, and when the piston rod 200 is retracted, the sealing gasket 311 can realize double sealing of the oil cylinder 100 under the division of the groove 312, and there are two sealing gaskets 311, which can further prevent the hydraulic oil from overflowing.

[0033] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. A piston seal, characterized in that: It comprises a sealing ring 1 (300) arranged on the inner wall of the oil cylinder (100) for sealing the oil cylinder (100), a piston rod (200) for extension and retraction is arranged in the cylinder cavity of the oil cylinder (100), and a sealing ring 2 (400) for fixing the sealing ring 1 (300) is arranged outside the sealing ring 1 (300); The inner side of the sealing ring 1 (300) is provided with a sealing component (310) for sealing the piston rod (200) inside the oil cylinder (100), and the outer side of the sealing ring 1 (300) is provided with a fixing component (320) for engaging with the sealing ring 2 (400).

2. A piston seal according to claim 1, characterized in that: The sealing assembly (310) includes a sealing gasket (311) arranged on the top of the sealing ring (300), and there are two sealing gaskets (311). The two sealing gaskets (311) are symmetrically distributed at the upper and lower ends of the sealing ring (300), and a groove (312) is opened in the middle of the inner side of the sealing gasket (311) to facilitate double sealing of the piston rod (200).

3. A piston seal according to claim 1, characterized in that: The fixing assembly (320) comprises an arc-shaped clamping strip (321) arranged on the outer side of the sealing ring (300) for clamping on the sealing ring (400), and the arc-shaped clamping strip (321) is clamped on the sealing ring (400) in an arc shape.

4. A piston seal according to claim 3, characterized in that: The bottom end of the arc-shaped clip strip 1 (321) is provided with an arc-shaped clip strip 2 (322) for cooperating with the arc-shaped clip strip 1 (321) to be engaged with the sealing ring 2 (400), and the shape and size of the arc-shaped clip strip 2 (322) are the same as those of the arc-shaped clip strip 1 (321).

5. A piston seal according to claim 1, characterized in that: The inner wall of the oil cylinder (100) is provided with a sealing groove (101) for facilitating installation of a sealing ring (300), and there are two sealing grooves (101), which are distributed in a linear array on the inner wall of the oil cylinder (100).

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