Sealing ring special for mine oil cylinder

Abstract

The special sealing ring for the mine oil cylinder comprises a sealing body and guide supporting rings arranged on the two sides of the sealing body, a sealing lip is arranged on the outer side of the sealing body, and the sealing lip is in transition connection with the end face of the sealing body through an inclined face. A self-lubricating oil groove is formed in the inner side of the sealing body. According to the utility model, bidirectional guide support is added, so that the stability of vertical movement of the oil cylinder is improved; the self-lubricating oil groove is additionally formed in the bottom of the sealing body, so that the product can achieve the self-lubricating performance, buffering extrusion can be achieved in the working process of the sealing body, and the sealing effect is enhanced; the sealing ring is simple in structure and convenient to maintain and install, the production time of the sealing ring can be saved, and therefore the damaged sealing ring in the production process can be replaced in time; the structure is simple, and the manufacturing size of the sealing ring can be conveniently adjusted according to the on-site workpiece abrasion condition so as to be suitable for the mine oil cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a special sealing ring for a mine oil cylinder. Background Art

[0002] According to user feedback, coal mining, bridge tunnel excavation and other working conditions are harsh. On the one hand, the dust and pollution are very high, which causes great wear and tear on the sealing rings of mining cylinders, and they often need to be repaired and replaced. On the other hand, standard parts are not used and need to be manufactured and used according to on-site conditions.

[0003] The Chinese utility model patent with the publication date of 2024.01.09 and the publication number of CN 220319991 U discloses a hydraulic cylinder guide sleeve sealing structure adapted to mud, sand and dust working conditions, including a cylinder barrel, a piston rod and a guide sleeve, characterized in that: the guide sleeve is connected to the piston rod, the piston rod passes through the inner hole of the guide sleeve, the other end of the piston rod is connected to the piston and placed in the cylinder barrel, and the guide sleeve includes: a support ring for force support, a step seal, a sealing ring, a retaining ring, a dirt ring and a dustproof ring. However, the sealing structure of this patent is too complicated, and it is not convenient for frequent maintenance and replacement when used in situations where dust or pollution is very large and the sealing structure is greatly worn.

[0004] The Chinese invention patent application with the publication date of 2015.05.20 and the publication number of CN 104632750 A discloses a Y-shaped sealing ring for a hydraulic oil cylinder, which includes an inner lip and an outer lip, and also includes an annular support portion, the support portion is connected to the root of the Y-shaped sealing ring through an annular connection portion, the angle formed by the inner lip and the piston rod axis is 17.5°, the vertex angle formed by the inner lip and the outer lip is 55°, and the single-sided interference size of the inner lip and the outer lip is 0.72mm. However, the patent has low support on the one hand, and the structure is too precise on the other hand, which is not convenient for adjusting and producing sealing rings of corresponding sizes for maintenance and replacement according to the wear of the workpiece under mining and bridge tunnel excavation conditions. Summary of the invention

[0005] In view of the above technical problems, the utility model proposes a special sealing ring for mining oil cylinders, which is used to solve the problem that the sealing rings in the prior art are inconvenient to be used in working conditions such as mining oil cylinders where the sealing rings need to be replaced frequently.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A special sealing ring for a mining oil cylinder comprises a sealing body and guide support rings arranged on both sides of the sealing body, a sealing lip is arranged on the outer side of the sealing body, and the sealing lip is transitionally connected to the end face of the sealing body through an inclined surface; a self-lubricating oil groove is arranged on the inner side of the sealing body. The utility model adds a two-way guide support to improve the stability of the oil cylinder moving up and down; the self-lubricating oil groove at the bottom of the sealing body is added, so that the product can achieve self-lubricating performance, and can also achieve buffering extrusion during the operation of the sealing body, thereby enhancing the sealing effect.

[0008] Furthermore, in order to improve the supporting performance of the sealing lip located outside the sealing body, the sealing lip is a circular arc surface sealing lip.

[0009] Furthermore, in order to improve the resilience, workability and wear resistance of the sealing ring, the sealing body is a high-performance polyurethane elastomer.

[0010] Furthermore, in order to improve the guiding support force, the guiding support ring is an inverted L-shaped structure; a straight edge on one side of the inverted L-shaped structure is in close contact with the end surface of the sealing body.

[0011] Furthermore, in order to realize bidirectional guide support and improve the stability of the up and down movement of the oil cylinder, the guide support rings are symmetrically arranged on both sides of the sealing body.

[0012] Furthermore, the outer side of the guide support ring is flush with the outermost side of the end surface of the sealing body.

[0013] Furthermore, the inner side of the guide support ring is flush with the innermost side of the end surface of the sealing body.

[0014] Furthermore, in order to improve the bidirectional supporting and guiding effect of the guide support ring on the sealing ring, the guide support ring is a polyoxymethylene elastomer.

[0015] Furthermore, in order to enable the sealing body to better achieve buffering and extrusion during operation, the self-lubricating oil groove is an arc groove.

[0016] Furthermore, the arc groove is arranged in the middle of the inner side of the sealing body, and the two ends of the arc groove are smoothly connected to the inner side surface of the sealing body.

[0017] Beneficial effects of the utility model:

[0018] 1. The sealing body of the utility model is made of high-performance polyurethane elastomer, which has better resilience, processability and wear resistance than the previous rubber-cloth type sealing body;

[0019] 2. The utility model adds a two-way guide support to improve the stability of the oil cylinder moving up and down;

[0020] 3. The utility model changes and expands the arc of the arc sealing surface to increase the friction surface;

[0021] 4. The utility model adds an arc groove at the bottom of the elastic body, which can make the product realize self-lubricating performance, and can also make the elastic body realize buffering extrusion during operation, and enhance the arc surface sealing effect;

[0022] 5. The utility model has a simple structure, is easy to maintain and install, and can save the production time of the sealing ring, so that the sealing ring damaged in the production process can be replaced in time; and the structure is simple, which is convenient for adjusting the production size of the sealing ring according to the wear of the workpiece on site, so as to be suitable for mining cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0025] Figure 2 It is a partially enlarged schematic diagram of the cross-sectional structure of the utility model.

[0026] Markings in the accompanying drawings: 1. sealing body, 11. sealing lip, 12. inclined surface, 13. self-lubricating oil groove, 2. guide support ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 and Figure 2 As shown, the special sealing ring for mining oil cylinders described in Example 1 of the utility model comprises a sealing body 1 and guide support rings 2 arranged on both sides of the sealing body 1, a sealing lip 11 is arranged on the outer side of the sealing body 1, and the sealing lip 11 is transitionally connected with the end face of the sealing body 1 through an inclined surface 12; a self-lubricating oil groove 13 is arranged on the inner side of the sealing body 1. The special sealing ring for mining oil cylinders has a simple structure, is easy to maintain and install, can save the production time of the sealing ring, and can replace the damaged sealing ring in the production process in time; and has a simple structure, which is convenient for adjusting the manufacturing size of the sealing ring according to the wear of the workpiece on site, so as to be suitable for mining oil cylinders.

[0029] In this embodiment, the sealing body 1 is a high-performance polyurethane elastomer, which has better resilience, processability and wear resistance than the previous rubber-cloth type sealing body; the guide support ring 2 is a polyoxymethylene elastomer, which has similar hardness, strength and rigidity to metal, has good self-lubrication and good fatigue resistance in a wide range of temperature and humidity, and is elastic, which can provide better guiding support for the sealing ring. In other embodiments, the sealing body 1 and the guide support ring 2 can be made of other highly elastic materials.

[0030] Furthermore, if Figure 2 As shown, the sealing lip 11 is a circular arc sealing lip. In this embodiment, the arc of the circular arc sealing lip is relatively large, thereby increasing the friction surface.

[0031] Furthermore, if Figure 2 As shown, the guide support ring 2 is symmetrically arranged on both sides of the sealing body 1 to improve the stability of the oil cylinder moving up and down. Specifically, the guide support ring 2 is an inverted L-shaped structure; one side of the inverted L-shaped structure has a straight edge that is close to the end face of the sealing body 1. In this embodiment, the shorter straight edge of one side of the inverted L-shaped structure guide support ring 2 is close to the end face of the sealing body 1, and the longer straight edge of the other side of the inverted L-shaped structure guide support ring 2 faces outward.

[0032] Furthermore, if Figure 2 As shown, the outer side of the guide support ring 2 is flush with the outermost side of the end surface of the sealing body 1. The inner side of the guide support ring 2 is flush with the innermost side of the end surface of the sealing body 1.

[0033] Embodiment 2 is different from Embodiment 1 in that Figure 2 As shown, the self-lubricating oil groove 13 is a circular arc groove.

[0034] Furthermore, if Figure 2 As shown, the arc groove is arranged in the middle of the inner side of the sealing body 1, and the two ends of the arc groove are smoothly connected to the inner side surface of the sealing body 1.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modification to the technical solutions described in the aforementioned embodiments, or any equivalent replacement of some or all of the technical features therein, within the spirit and principles of the present invention, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A special sealing ring for mining oil cylinder, It is characterized in that The invention comprises a sealing body (1) and guide support rings (2) arranged on both sides of the sealing body (1); a sealing lip (11) is arranged on the outer side of the sealing body (1); the sealing lip (11) is transitionally connected to the end face of the sealing body (1) via an inclined surface (12); and a self-lubricating oil groove (13) is arranged on the inner side of the sealing body (1).

2. The special sealing ring for mining oil cylinder according to claim 1, It is characterized in that The sealing lip (11) is a circular arc surface sealing lip.

3. The special sealing ring for mining oil cylinder according to claim 1 or 2, It is characterized in that The sealing body (1) is a high-performance polyurethane elastomer.

4. The special sealing ring for mining oil cylinder according to claim 1 or 2, It is characterized in that The guide support ring (2) is an inverted L-shaped structure; a straight edge on one side of the inverted L-shaped structure is in close contact with the end surface of the sealing body (1).

5. The special sealing ring for mining oil cylinder according to claim 4, It is characterized in that The guide support rings (2) are symmetrically arranged on both sides of the sealing body (1).

6. The special sealing ring for mining oil cylinder according to claim 4, It is characterized in that The outer side of the guide support ring (2) is flush with the outermost side of the end surface of the sealing body (1).

7. The special sealing ring for mining oil cylinder according to claim 4, It is characterized in that The inner side of the guide support ring (2) is flush with the innermost side of the end surface of the sealing body (1).

8. The special sealing ring for mining oil cylinder according to any one of claims 1 or 2 or 5 to 7, It is characterized in that The guide support ring (2) is a polyoxymethylene elastomer.

9. The special sealing ring for mining oil cylinder according to any one of claims 1 or 2 or 5 to 7, It is characterized in that The self-lubricating oil groove (13) is a circular arc groove.

10. The special sealing ring for mining oil cylinder according to claim 9, It is characterized in that The circular arc groove is arranged in the middle of the inner side of the sealing body (1), and the two ends of the circular arc groove are connected to the inner side surface of the sealing body (1) in a smooth filtering manner.

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