High-temperature-resistant buffer sealing element

Abstract

The utility model relates to a high temperature resistant buffer sealing element in the technical field of sealing elements, the sealing element comprises a sealing assembly arranged on a piston body of a piston device, and the right side of the sealing assembly is provided with a buffer arc ring used for buffering the sealing assembly. A protection assembly used for buffering the sealing assembly is arranged on the left side of the sealing assembly. The circular arc groove is formed in the sealing rubber ring, the buffering circular arc ring is arranged in the circular arc groove, and the gap is reserved between the buffering circular arc ring and the circular arc groove, so that hydraulic oil can be fully buffered when the sealing rubber ring is extruded; and a protection check ring and a buffering circular ring are sequentially arranged on the left side of the sealing rubber ring, cutting of the first clamping groove and the second clamping groove to the protection check ring can be effectively reduced, and buffering protection can be further conducted on the sealing rubber ring.

Description

Technical Field

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

[0002] When a common hydraulic cylinder is working under high pressure, a seal is installed in front of the piston rod main seal to ensure the normal movement of the piston rod in the cylinder. However, when the existing piston seal is used, the groove is provided on the sealing rubber ring, which is not conducive to buffering.

[0003] For example, a cylinder piston seal with Chinese patent application number CN202320035596.3, a piston rod is provided at the central position of one side outer wall of the cylinder piston, and a sealing rubber ring groove is provided on the outer wall of the cylinder piston adjacent to the piston rod, an embedded groove is provided on one side outer wall of the cylinder piston near the sealing rubber ring groove, an embedded ring is provided inside the embedded groove, a sealing rubber ring is provided at the central position of one side outer wall of the embedded ring, a groove is provided on the outer wall of the sealing rubber ring away from the embedded ring, a first sealing lip is provided on one side outer wall of the sealing rubber ring near the groove, and a second sealing lip is provided on one side outer wall of the sealing rubber ring near the first sealing lip. It has the following technical defects:

[0004] When the piston moves in the oil cylinder, due to the grooves on the sealing rubber ring and the lack of a buffer component, the impact of high-pressure oil can easily cause the sealing rubber ring to rupture and lead to overall failure, which is not conducive to the sealing of the oil cylinder piston by the sealing rubber ring. Utility Model Content

[0005] In order to solve the problem that when the piston moves in the oil cylinder, due to the grooves provided on the sealing rubber ring and the lack of a buffer component, the sealing rubber ring is easily broken and fails as a whole under the impact of high-pressure oil, which is not conducive to the sealing of the oil cylinder piston by the sealing rubber ring, the utility model provides the following technical solutions:

[0006] A high temperature resistant buffer seal comprises a sealing device installed on a piston device inside an oil cylinder and used for sealing the piston device. A support ring for assisting the piston device in telescoping is arranged on the plug body of the piston device.

[0007] The sealing device comprises a sealing component arranged on the plug body of the piston device, a buffer arc ring for buffering the sealing component is arranged on the right side of the sealing component, and a protective component for buffering the sealing component is arranged on the left side of the sealing component.

[0008] Furthermore, the piston device comprises a piston arranged in the cylinder cavity of the oil cylinder for moving left and right, and a piston rod for synchronously extending and retracting with the piston is inserted in the middle of the piston body.

[0009] Furthermore, a groove for fixing the support ring is provided on the plug body of the piston, a first card groove for installing one of the sealing devices is provided on the left side of the groove, and a second card groove for installing the other sealing device is provided on the right side of the groove.

[0010] Furthermore, the sealing assembly includes a sealing rubber ring engaged in the second card slot, a circular arc groove for sealing the piston device is opened on the right side of the sealing rubber ring, and a buffer circular arc ring is fixedly installed in the groove cavity of the circular arc groove.

[0011] Furthermore, the protection assembly includes a protection retaining ring arranged on the left side of the sealing rubber ring, and a buffer ring for protecting and buffering the protection retaining ring is arranged on the left side of the protection retaining ring.

[0012] Furthermore, a cylinder cover for tightening the cylinder is arranged on the right side of the oil cylinder, and fixing bolts for fixing the cylinder cover are arranged at the right end of the cylinder cover, and there are several fixing bolts, which are distributed in a circular array at the right end of the cylinder cover.

[0013] Furthermore, an oil inlet for conveying hydraulic oil to the oil cylinder is provided at the top of the cylinder body of the oil cylinder, and an oil outlet for discharging the hydraulic oil in the oil cylinder is provided on the front side wall of the cylinder body of the oil cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By setting up a sealing device, by opening an arc groove on the sealing rubber ring, and by providing a buffer arc ring in the arc groove, and leaving a gap between the buffer arc ring and the arc groove, the hydraulic oil can be fully buffered when squeezing the sealing rubber ring; and a protective retaining ring and a buffer ring are sequentially provided on the left side of the sealing rubber ring, which can effectively reduce the cutting of the protective retaining ring by the first and second grooves, and can further provide buffer protection for the sealing rubber ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the oil cylinder of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the piston device of the utility model;

[0019] Figure 4 This is a cross-sectional view of the piston of the utility model;

[0020] Figure 5 For this utility model Figure 4 Enlarged view of point A in the middle.

[0021] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0022] 100-oil cylinder, 101-cylinder head, 102-fixing bolt;

[0023] 200-piston device, 210-piston rod, 220-piston, 221-slot 1, 222-groove, 223-slot 2;

[0024] 300-sealing device, 310-sealing assembly, 311-sealing rubber ring, 312-arc groove, 320-buffer arc ring, 330-protection assembly, 331-buffer ring, 332-protection retaining ring;

[0025] 400-support ring;

[0026] 001-Oil inlet, 002-Oil outlet. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 5 , the utility model provides a high temperature resistant buffer seal.

[0029] When a common hydraulic cylinder works under high pressure, a seal is installed in front of the main seal of the piston rod to ensure that the piston rod moves normally in the cylinder; however, when the existing piston seal is used, a groove is provided on the sealing rubber ring, which is not conducive to buffering; therefore, it is necessary to improve it, which includes a cylinder 100, a piston device 200 for telescopic movement is provided in the cylinder cavity of the cylinder 100, a sealing device 300 for sealing the piston device 200 is provided on the plug body of the piston device 200, and a support ring 400 for assisting the piston device 200 in telescopic movement is provided on the plug body of the piston device 200;

[0030] A cylinder cover 101 for tightening the cylinder 100 is provided on the right side of the oil cylinder 100, and a rubber pad is set between the cylinder cover 101 and the oil cylinder 100 to prevent the hydraulic oil in the oil cylinder 100 from overflowing; a fixing bolt 102 for fixing the cylinder cover 101 is provided at the right end of the cylinder cover 101, and there are a plurality of fixing bolts 102, which are distributed in a circular array at the right end of the cylinder cover 101;

[0031] An oil inlet 001 for conveying hydraulic oil to the oil cylinder 100 is provided at the top of the cylinder body of the oil cylinder 100, and an oil outlet 002 for discharging the hydraulic oil in the oil cylinder 100 is provided on the front side wall of the cylinder body of the oil cylinder 100, so that when the hydraulic oil in the hydraulic system enters the oil cylinder 100 through the oil inlet 001, it can drive the piston device 200 to extend and retract, and the hydraulic oil in the oil cylinder 100 is then conveyed to the hydraulic box in the hydraulic system through the oil outlet 002, so as to reciprocate and retract the piston device 200;

[0032] The piston device 200 includes a piston 220 disposed in the cylinder cavity of the oil cylinder 100 for moving left and right. A piston rod 210 is inserted in the middle of the piston body of the piston 220 for synchronously extending and retracting with the piston 220. Thus, the hydraulic oil in the hydraulic system enters the oil cylinder 100 through the oil inlet 001 and is then transported to the hydraulic box in the hydraulic system through the oil outlet 002, thereby driving the piston 220 and the piston rod 210 to move in the cylinder cavity of the oil cylinder 100 at the same time.

[0033] A groove 222 for fixing the support ring 400 is provided on the plug body of the piston 220, so that the support ring 400 can be clamped in the groove 222, which facilitates the expansion and contraction of the piston 220 in the oil cylinder 100; a first clamping groove 221 for installing one of the sealing devices 300 is provided on the left side of the groove 222, and a second clamping groove 223 for installing the other sealing device 300 is provided on the right side of the groove 222, and the first clamping groove 221 and the second clamping groove 223 are the same in shape and size, so that the sealing devices 300 in the first clamping groove 221 and the second clamping groove 223 can prevent high-pressure hydraulic oil from entering the right side of the piston 220;

[0034] The sealing device 300 includes a sealing assembly 310 disposed on the plug body of the piston device 200, a buffer arc ring 320 for buffering the sealing assembly 310 is disposed on the right side of the sealing assembly 310, and a protection assembly 330 for buffering the sealing assembly 310 is disposed on the left side of the sealing assembly 310;

[0035] The sealing assembly 310 includes a sealing rubber ring 311 engaged in the second card groove 223, and the sealing rubber ring 311 is made of thermoplastic polyurethane. Thermoplastic polyurethane molded products have high heat resistance and compression permanent deformation resistance, so that the sealing rubber ring 311 can achieve high temperature resistance. The right side of the sealing rubber ring 311 is provided with an arc groove 312 for sealing the piston device 200, and a buffer arc ring 320 is fixedly installed in the groove cavity of the arc groove 312, and a gap is left between the buffer arc ring 320 and the arc groove 312, so that when the hydraulic oil squeezes the arc groove 312, it can be fully buffered.

[0036] The protection component 330 includes a protection retaining ring 332 arranged on the left side of the sealing rubber ring 311, and the material of the protection retaining ring 33 is polytetrafluoroethylene or acetal resin; a buffer ring 331 is arranged on the left side of the protection retaining ring 332 for protecting and buffering the protection retaining ring 332, which can effectively reduce the cutting of the protection retaining ring 332 by the slot 1 221 and the slot 2 223, and can further provide buffer protection for the sealing rubber ring 311.

[0037] 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 high temperature resistant buffer seal, Features: It comprises a sealing device (300) installed on a piston device (200) inside an oil cylinder (100) and used for sealing the piston device (200); a support ring (400) is provided on the plug body of the piston device (200) and is used for assisting the piston device (200) in telescoping; The sealing device (300) comprises a sealing component (310) arranged on a plug body of a piston device (200), a buffer arc ring (320) for buffering the sealing component (310) being arranged on the right side of the sealing component (310), and a protective component (330) for buffering the sealing component (310) being arranged on the left side of the sealing component (310).

2. A high temperature resistant buffer seal according to claim 1, Features: The piston device (200) comprises a piston (220) arranged in the cylinder cavity of the oil cylinder (100) for moving left and right, and a piston rod (210) is inserted in the middle of the plug body of the piston (220) for synchronous extension and retraction with the piston (220).

3. A high temperature resistant buffer seal according to claim 2, Features: The piston body (220) is provided with a groove (222) for fixing the support ring (400), the left side of the groove (222) is provided with a first clamping groove (221) for installing one of the sealing devices (300), and the right side of the groove (222) is provided with a second clamping groove (223) for installing the other sealing device (300).

4. A high temperature resistant buffer seal according to claim 3, Features: The sealing assembly (310) comprises a sealing rubber ring (311) engaged in the second engaging groove (223), a circular arc groove (312) for sealing the piston device (200) is provided on the right side of the sealing rubber ring (311), and a buffer circular arc ring (320) is fixedly installed in the groove cavity of the circular arc groove (312).

5. A high temperature resistant buffer seal according to claim 4, Features: The protection assembly (330) comprises a protection retaining ring (332) arranged on the left side of the sealing rubber ring (311), and a buffer ring (331) for protecting and buffering the protection retaining ring (332) is arranged on the left side of the protection retaining ring (332).

6. A high temperature resistant buffer seal according to claim 1, Features: A cylinder cover (101) for tightening the cylinder (100) is arranged on the right side of the oil cylinder (100), and a fixing bolt (102) for fixing the cylinder cover (101) is arranged at the right end of the cylinder cover (101), and there are a plurality of fixing bolts (102), which are distributed in a circular array at the right end of the cylinder cover (101).

7. A high temperature resistant buffer seal according to claim 1, Features: An oil inlet (001) for conveying hydraulic oil to the oil cylinder (100) is provided at the top of the cylinder body of the oil cylinder (100), and an oil outlet (002) for discharging the hydraulic oil in the oil cylinder (100) is provided on the front side wall of the cylinder body of the oil cylinder (100).

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