High-pressure oil seal structure convenient to replace

Abstract

The utility model discloses a high-pressure oil seal structure convenient to replace, which comprises a metal framework and a hyperelastic sealing body, the metal framework is bonded with the hyperelastic sealing body through vulcanization, the upper end part of the hyperelastic sealing body is provided with a sealing bulge, and the sealing bulge is convenient for maintenance personnel to apply force when the oil seal is replaced. And the operation of replacing the oil seal becomes easy and simple. According to the high-pressure oil seal structure convenient to replace, the hyperelastic sealing body is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber or polyurethane materials, abrasion caused by friction when a shaft makes contact with the oil seal can be effectively reduced through the materials, the service life of the oil seal is prolonged, the protruding structure is designed on the upper end face of the hyperelastic sealing body, and the service life of the oil seal is prolonged. The high-pressure pump oil seal replacing device provides an excellent acting point for maintenance personnel, enables the operation of replacing the oil seal to be easy and simple, greatly shortens the replacing time, improves the maintenance efficiency, reduces the shutdown time of a high-pressure pump, and guarantees the production continuity.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically to a high-pressure oil seal structure that is easy to replace. Background Technology

[0002] In high-pressure pump systems, oil seals, as critical sealing components, play a vital role in preventing leakage of the working medium, maintaining stable system pressure, and protecting the internal mechanical structure of the pump from contamination. Since high-pressure pump systems typically operate under harsh conditions of high pressure, high speed, and vibration and impact, extremely high requirements are placed on the performance and reliability of oil seals. Existing high-pressure oil seal structures still have certain defects in use. During use, oil seals are fixed in a traditional way, which results in an interference fit, thus reducing the service life of the oil seal.

[0003] To overcome the above-mentioned defects, prior art 1 (Chinese patent application number CN221120908U, application date 2023-10-26) provides an oil seal for an ultra-high pressure, high-speed, bidirectional rotating shaft, comprising: a first support frame with a sealing structure covering its inner side; a second support frame sleeved at the bottom of the sealing structure, the first and second support frames cooperating with each other; an annular spring sleeved on the inner side of the sealing structure, which facilitates elastic compression of the sealing structure, allowing the sealing lip to fit tightly against the shaft; multiple anti-detachment structures arranged in a ring array on the outside of the annular spring, which are installed inside the sealing structure and used to limit the position of the annular spring; by utilizing the arrangement of the first support frame and the sealing structure, a single-point seal is achieved on the shaft through the close sealing between a single sealing lip and the shaft. This sealing method has a low coefficient of friction, low heat generation, is less prone to early hardening of the lip, and has a longer service life.

[0004] While existing technologies can improve the service life of oil seals, the use of multiple anti-dislodgement structures to limit the position of the ring spring during operation not only increases production costs but also, due to the complexity of the structure, requires maintenance personnel to spend a lot of time and effort carefully disassembling numerous related components when the oil seal needs to be replaced. This process is cumbersome and can easily damage other parts, increasing maintenance costs. Furthermore, improper operation during disassembly may cause deformation of the oil seal itself or the pump body, further affecting the normal operation of the system.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing high-pressure oil seal structure that is easy to replace. Therefore, we proposed a high-pressure oil seal structure that is easy to replace, which can effectively solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a high-pressure oil seal structure that is easy to replace, in order to solve the problems mentioned in the background art. Currently, the market uses multiple anti-dislodgement structures to limit the position of the ring spring, which not only increases the production cost, but also, due to the complexity of the structure, requires maintenance personnel to spend a lot of time and effort to carefully disassemble many related parts when the oil seal needs to be replaced. The process is cumbersome and can easily damage other parts, increasing maintenance costs. Furthermore, improper operation during disassembly may cause deformation of the oil seal itself or the pump body, further affecting the normal operation of the system.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure oil seal structure that is easy to replace, comprising a metal skeleton and a super-elastic sealing body. The metal skeleton is bonded to the super-elastic sealing body by vulcanization. The upper end of the super-elastic sealing body is provided with a sealing protrusion. The sealing protrusion facilitates the force applied by maintenance personnel when replacing the oil seal, making the oil seal replacement operation easy and simple.

[0008] Preferably, the sealing protrusion contacts the inner wall surface of the upper end of the assembly housing to form a seal.

[0009] Preferably, the superelastic seal is provided with sealing structures at both ends, and the sealing structures include dustproof lips and oil sealing lips.

[0010] Preferably, the dustproof lip and the oil-sealing lip are located at the top and bottom ends of the superelastic seal, respectively.

[0011] Preferably, the radial cross-section of the sealing protrusion is arc-shaped, triangular, or trapezoidal, which facilitates disassembly.

[0012] Preferably, a metal skeleton is vulcanized and bonded to the inner side of the superelastic seal body, and a spring groove is provided on the outer side of the superelastic seal body, in which a metal spring is assembled.

[0013] Preferably, the superelastic sealant is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber, or polyurethane.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The easily replaceable high-pressure oil seal structure uses a super-elastic sealing body made of nitrile rubber, hydrogenated nitrile rubber, fluororubber, or polyurethane. These materials effectively reduce wear caused by friction between the shaft and the oil seal, extending the service life of the oil seal. The protruding structure on the upper surface of the super-elastic sealing body provides excellent leverage points for maintenance personnel, making oil seal replacement easy and simple, significantly shortening replacement time, improving maintenance efficiency, reducing high-pressure pump downtime, and ensuring production continuity. The specific details are as follows:

[0015] (1) The super-elastic sealing body has a certain geometric shape and size, which makes it easy for maintenance personnel to disassemble using common disassembly tools. This greatly facilitates the force application operation when replacing the oil seal, making the oil seal replacement operation easy and simple.

[0016] (2) Since the metal skeleton and the super-elastic seal are connected by vulcanization bonding, the overall connection sealing performance is greatly improved, reducing the problem of insufficient sealing force caused by single-point sealing and reducing the problem of oil seal leakage.

[0017] (3) The dustproof lip can effectively block external dust, impurities and other contaminants from entering the high-pressure pump and protect the precision components of the pump body. The oil sealing lip plays a key sealing role to ensure that the oil in the high-pressure pump will not leak and maintain the normal pressure and working performance of the system.

[0018] (4) The sealing protrusion contacts the inner wall surface of the upper end of the assembly housing to form a seal, which improves the overall sealing effect. In addition, the metal spring inside the spring groove on the side end of the super-elastic seal body is convenient for installation and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall side view structure of this utility model;

[0021] Figure 3 This is a top view of the overall structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the superelastic sealing body and the assembly housing of this utility model;

[0024] Figure 6 This is a partial cross-sectional structural diagram of the present invention;

[0025] Figure 7 This utility model Figure 6 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 1. Metal frame; 2. Ultra-elastic seal; 3. Sealing protrusion; 4. Dustproof lip; 5. Oil sealing lip; 6. Assembly housing; 7. Metal spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: In this example, the sealing protrusion 3 provided on the upper end face of the superelastic seal 2 provides an excellent leverage point for maintenance personnel, making the oil seal replacement operation easy and simple, significantly shortening the replacement time, improving maintenance efficiency, reducing the downtime of the high-pressure pump, and ensuring the continuity of production. Figures 1-7The technical solution shown includes a metal skeleton 1 and a super-elastic seal 2. The metal skeleton 1 is bonded to the super-elastic seal 2 via vulcanization. A sealing protrusion 3 is provided at the upper end of the super-elastic seal 2. The sealing protrusion 3 facilitates the application of force by maintenance personnel when replacing the oil seal, making the replacement operation easy and simple. The sealing protrusion 3 contacts the inner wall surface of the upper end of the assembly housing 6 to form a seal. Sealing structures are provided at both ends of the super-elastic seal 2, including a dust lip 4 and an oil sealing lip 5, located at the top and bottom ends of the super-elastic seal 2 respectively. The radial cross-section of the sealing protrusion 3 is arc-shaped, triangular, or trapezoidal, achieving convenient disassembly. The super-elastic... A metal skeleton 1 is vulcanized and bonded to the inner side of the sealing body 2. A spring groove is provided on the outer side of the superelastic sealing body 2, and a metal spring 7 is installed in the spring groove. The superelastic sealing body 2 is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber, or polyurethane. Because the metal skeleton 1 and the superelastic sealing body 2 are connected by vulcanization and bonding, the overall connection sealing performance is greatly improved, reducing the problem of insufficient sealing force caused by single-point sealing and reducing oil seal leakage. The superelastic sealing body 2 is made of nitrile rubber, hydrogenated nitrile rubber, fluororubber, or polyurethane. The above materials can effectively reduce wear caused by friction when the shaft and oil seal are in contact, extend the service life of the oil seal, and maintain the lubrication effect and operation of the equipment. For safety, the super-elastic seal body 2 and the sealing protrusion 3 have a specific geometric shape and size. The sealing protrusion 3 of this application adopts a flat and easy-to-apply design, and its shape is a regular circle, which facilitates the use of common disassembly tools such as internal calipers by maintenance personnel. At the same time, the overall structure design of the oil seal has been optimized. During installation, the cooperation between the oil seal and other internal components of the high-pressure pump has been improved. Whether from a mechanical point of view, it is easy to apply force, or it is compatible with commonly used disassembly tools, it performs excellently. This greatly facilitates the application of force by maintenance personnel when replacing the oil seal, making the operation of replacing the oil seal easy and simple, significantly shortening the replacement time, and improving maintenance efficiency. This reduces the downtime of the high-pressure pump and ensures the continuity of production. The inner surface of the super-elastic seal is provided with a dustproof lip 4 and an oil sealing lip 5. The dustproof lip 4 can effectively block external dust, impurities and other contaminants from entering the high-pressure pump and protect the precision components of the pump body. The oil sealing lip 5 plays a key sealing role, ensuring that the oil in the high-pressure pump will not leak and maintaining the normal pressure and working performance of the system. The sealing protrusion 3 contacts the inner wall surface of the upper end of the assembly housing 6 to form a seal, which improves the overall sealing effect. In addition, the metal spring 7 inside the spring groove on the side end of the super-elastic seal 2 facilitates installation and use. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-pressure oil seal structure convenient to replace, comprising a metal framework (1) and a super-elastic sealing body (2) arranged. characterized in that The metal framework (1) is vulcanized with the super-elastic sealing body (2), and the super-elastic sealing body (2) is provided with a sealing protrusion (3) at the upper end, which facilitates the force operation of maintenance personnel when replacing the oil seal, so that the operation of replacing the oil seal becomes easy and simple.

2. The easily replaceable high pressure oil seal structure of claim 1, wherein: The sealing protrusion (3) is in surface contact with the inner wall of the upper end of the assembled shell (6) to form a seal.

3. The easily replaceable high pressure oil seal structure of claim 1, wherein: The super-elastic sealing body (2) is provided with a sealing structure at both ends, and the sealing structure comprises a dust-proof lip (4) and an oil sealing lip (5).

4. The easily replaceable high pressure oil seal structure of claim 3, wherein: The dust-proof lip (4) and the oil sealing lip (5) are respectively located at the top end and the bottom end of the super-elastic sealing body (2).

5. The easily replaceable high pressure oil seal structure of claim 1, wherein: The radial cross-section of the sealing protrusion (3) is a circular arc, a triangle or a trapezoid, achieving the effect of convenient disassembly.

6. The high pressure oil seal structure according to claim 1, wherein: The super-elastic sealing body (2) is vulcanized with the metal framework (1) on the inner side, and is provided with a spring groove on the outer side, and the spring groove is assembled with a metal spring (7).

7. The high pressure oil seal structure according to claim 1, wherein: The super-elastic sealing body (2) is made of butyl rubber, hydrogenated butyl rubber, fluorine rubber or polyurethane.

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