Long-service-life hydraulic oil cylinder sealing ring

Abstract

The utility model relates to a long-life hydraulic oil cylinder sealing ring, which is characterized in that an opening at the upper end of an oil cylinder body (3) is sleeved with a telescopic rod (1), a sealing ring body (2) is arranged between the opening at the upper end of the oil cylinder body (3) and the telescopic rod (1), and the sealing ring body (2) further comprises a sealing ring reinforcing outer ring (2-1) and a sealing ring inner ring (2-2). Spring steel plates (2-11) are arranged on the surface of the upper portion of a base table (2-12) of the sealing ring reinforcing outer ring (2-1) at equal intervals, the lower ends of the spring steel plates (2-11) are inserted into the base table (2-12), the spring steel plates (2-11) incline towards one side of the circle center of the base table (2-12), step-shaped limiting steps (2-13) are arranged on the side, facing the circle center, of the lower portion of the base table (2-12), and the base table (2-12) is fixedly connected to an opening in the upper end of the oil cylinder body (3). The telescopic rod can prevent sundries such as metal scraps, quartz stone particles or dust particles from entering the oil cylinder to damage the sealing ring when the telescopic rod works, and the service life of the hydraulic oil cylinder can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to a sealing ring, in particular to a sealing ring for a long-life hydraulic cylinder. Background Art

[0002] Hydraulic cylinders are widely used in construction machinery. When the cylinder expands and contracts, the grease on the surface of the telescopic rod will inevitably be contaminated with fine dust and other debris. Among these small particles, there are hard metal chips, quartz particles or dust particles. When the telescopic rod expands and contracts, these hard debris or particles will be carried into the cylinder, damaging the original sealing ring. After being damaged to a certain extent, the sealing ring inside the hydraulic cylinder will fail, and then the hydraulic cylinder will be damaged.

[0003] Currently, the utility model with the patent number CN202360498U discloses a sealed hydraulic cylinder, which consists of a cylinder barrel and a cylinder seat. The cylinder seat is welded to the cylinder barrel as a whole. An oil inlet and outlet flow channel is provided on the cylinder seat. A piston is installed in the cylinder barrel. One end of the piston rod is fixedly welded to the piston, and the other end passes through the cylinder barrel. A circular cylinder plug is provided at the top of the cylinder barrel. A support ring, a first dust-proof ring and a second dust-proof ring are provided on the inner side wall of the circular cylinder plug. The support ring, the first dust-proof ring and the second dust-proof ring are all sleeved on the piston rod. An oil seal ring is provided between the support ring and the first dust-proof ring. A sealing ring is provided between the first dust-proof ring and the second dust-proof ring. The phenomenon and probability of oil leakage of the utility model are greatly reduced, and at the same time, the dust-proof effect of the hydraulic cylinder is improved, thereby prolonging the service life of the hydraulic cylinder. However, this application scheme proposes to rely on multiple dust-proof rings and sealing rings to achieve the dust-proof purpose on the basis of the prior art. However, in long-term use, the internal dust-proof rings and sealing rings will still be gradually damaged by dust particles, and only the purpose of delaying damage can be achieved, and the service life cannot be significantly extended. Summary of the Invention

[0004] Aiming at the problems existing in the above prior art, the utility model provides a sealing ring for a long-life hydraulic cylinder, which can prevent debris such as metal chips, quartz particles or dust particles from entering the cylinder and damaging the sealing ring when the telescopic rod works, and can effectively improve the service life of the hydraulic cylinder.

[0005] To achieve the above object, the utility model, a long-life hydraulic cylinder seal ring, includes a telescopic rod, a seal ring body, a seal ring reinforcement outer ring, a spring steel plate, a base, a limiting step, a seal ring inner ring, a steel scraping ring, a seal ring sleeve, a sealing oil ring, a telescopic rod sleeve groove, and a cylinder body. The upper end opening of the cylinder body is sleeved with the telescopic rod, and a seal ring body is provided between the upper end opening of the cylinder body and the telescopic rod. The seal ring body further includes a seal ring reinforcement outer ring and a seal ring inner ring. Spring steel plates are arranged at equal intervals on the upper surface of the base of the seal ring reinforcement outer ring. The lower ends of the spring steel plates are inserted into the base, and the spring steel plates are inclined towards the center of the base. A stepped limiting step is provided on the side of the lower part of the base facing the center. The base is fixedly connected to the upper end opening of the cylinder body; the upper end of the seal ring sleeve of the seal ring inner ring is fixedly connected to the steel scraping ring, the lower end of the seal ring sleeve is fixedly connected to the sealing oil ring, a telescopic rod sleeve groove is formed around the middle section of the inner side of the seal ring sleeve, and the sealing oil ring is embedded in an oil ring groove preset on the inner side of the cylinder body; the base is sleeved with the seal ring sleeve, and the upper end of the spring steel plate abuts against the lower edge of the steel scraping ring; an oil ring is preset in the telescopic rod sleeve groove.

[0006] In addition, the long-life hydraulic cylinder seal ring proposed according to the above embodiment of the utility model may further have the following additional technical features:

[0007] As a further improvement of the utility model, the steel scraping ring is composed of two left and right semi-circular steel sheets.

[0008] As a further improvement of the utility model, the top end of the spring steel plate is fixedly connected to the lower edge of the steel scraping ring.

[0009] As a further improvement of the utility model, fibers are embedded in the seal ring sleeve.

[0010] As a further improvement of the utility model, the steel scraping ring and the base are made of stainless steel.

[0011] By means of the above solution, the utility model has at least the following advantages: Compared with a conventional cylinder, by adding a seal ring body between the outer edge of the opening of the cylinder body and the telescopic rod, the steel scraping ring of the seal ring body is used to scrape off the dust and other particles on the surface of the telescopic rod, which can effectively prevent sundries such as metal debris, quartz particles, or dust particles from entering the interior along the gap between the telescopic rod and the cylinder body and damaging the seal ring. At the same time, the spring steel plate provides pressure to the steel scraping ring and the seal ring sleeve, further improving the sealing performance of the steel scraping ring and the seal ring sleeve and the ability to remove sundries such as metal debris, quartz particles, or dust particles, preventing sundries such as metal debris, quartz particles, or dust particles from entering the cylinder and damaging the seal ring during the operation of the telescopic rod, and effectively improving the service life of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a three-dimensional schematic diagram of a long-life hydraulic cylinder seal ring;

[0013] Figure 2 It is a three-dimensional diagram of the strengthened outer ring of the seal ring of the long-life hydraulic cylinder seal ring;

[0014] Figure 3 It is a three-dimensional sectional view of the strengthened outer ring of the seal ring of the long-life hydraulic cylinder seal ring;

[0015] Figure 4 It is a three-dimensional diagram of the inner ring of the seal ring of the long-life hydraulic cylinder seal ring;

[0016] Figure 5 It is a three-dimensional sectional view of the inner ring of the seal ring of the long-life hydraulic cylinder seal ring;

[0017] Figure 6 It is a schematic diagram of the installation of the long-life hydraulic cylinder seal ring;

[0018] In the figure: 1. Telescopic rod, 2. Seal ring body, 2-1. Strengthened outer ring of the seal ring, 2-11. Spring steel plate, 2-12. Base, 2-13. Limit step, 2-2. Inner ring of the seal ring, 2-21. Steel scraping ring, 2-22. Seal ring sleeve, 2-23. Sealing oil ring, 2-24. Telescopic rod sleeve groove, 3. Cylinder body. Specific implementation mode

[0019] The following describes the long-life hydraulic cylinder seal ring of the present invention in conjunction with the accompanying drawings.

[0020] In the first embodiment of the present application, as Figures 1 to 5As shown in the figure, this long-life hydraulic cylinder seal ring (hereinafter referred to as "this patent") includes a telescopic rod 1, a seal ring body 2, a seal ring reinforcement outer ring 2-1, a spring steel plate 2-11, a base 2-12, a limiting step 2-13, a seal ring inner ring 2-2, a steel scraping ring 2-21, a seal ring sleeve 2-22, a sealing oil ring 2-23, a telescopic rod sleeve groove 2-24 and a cylinder body 3. The upper end opening of the cylinder body 3 is sleeved with the telescopic rod 1, and a seal ring body 2 is provided between the upper end opening of the cylinder body 3 and the telescopic rod 1. The seal ring body 2 further includes a seal ring reinforcement outer ring 2-1 and a seal ring inner ring 2-2. Spring steel plates 2-11 are arranged at equal intervals on the upper surface of the base 2-12 of the seal ring reinforcement outer ring 2-1. The lower ends of the spring steel plates 2-11 are inserted into the base 2-12. The spring steel plates 2-11 are inclined towards the side of the center of the base 2-12. A stepped limiting step 2-13 is provided on the side of the lower part of the base 2-12 facing the center. The base 2-12 is fixedly connected to the upper end opening of the cylinder body 3; the upper end of the seal ring sleeve 2-22 of the seal ring inner ring 2-2 is fixedly connected to the steel scraping ring 2-21, and the lower end of the seal ring sleeve 2-22 is fixedly connected to the sealing oil ring 2-23. A telescopic rod sleeve groove 2-24 is provided around the middle section inside the seal ring sleeve 2-22. The sealing oil ring 2-23 is embedded in an oil ring groove preset inside the cylinder body 3; the base 2-12 is sleeved with the seal ring sleeve 2-22, and the upper end of the spring steel plate 2-11 abuts against the lower edge of the steel scraping ring 2-21; an oil ring is preset in the telescopic rod sleeve groove 2-24.

[0021] A sealed hydraulic cylinder with the utility model number CN202360498U (hereinafter referred to as "this patent") proposes to achieve the purpose of dust prevention by relying on multiple dust-proof rings and seal rings in the prior art. However, during long-term use, the internal dust-proof rings and seal rings will still be gradually damaged by dust particles, and only the purpose of delaying damage can be achieved, and the service life cannot be significantly extended. In this patent, the steel scraping ring 2-21 is used to sleeve the telescopic rod 1 to directly scrape off all the metal debris, quartz particles or dust particles and other sundries on the surface of the telescopic rod 1, as much as possible to reduce the entry of sundries into the cylinder body 3. At the same time, the spring steel plate 2-11 provides extrusion for the steel scraping ring 2-21 and the seal ring sleeve 2-22 to ensure the long-term reliability of its sealing and scraping functions. In addition, an oil ring is provided in the telescopic rod sleeve groove 2-24 inside the seal ring sleeve 2-22. The oil ring can form a third line of defense after the steel scraping ring 2-21 and the seal ring sleeve 2-22 to effectively prevent all sundries that may damage the internal seal ring of the cylinder body 3 from entering and ensure the long-term stable operation of the hydraulic cylinder.

[0022] The second embodiment is basically the same in structure as the first embodiment, except that the steel scraping ring 2-21 is composed of two left and right semi-circular steel sheets. The top of the spring steel plate 2-11 is fixedly connected to the lower edge of the steel scraping ring 2-21. The steel scraping ring 2-21 composed of two semi-circular steel sheets can ensure stable clamping of the telescopic rod 1 while enabling the spring steel plate 2-11 to better push the steel scraping ring 2-21 to fit the telescopic rod 1. The spring steel plate 2-11 fixedly connected to the steel scraping ring 2-21 can improve the overall stability and reduce the pressure on the sealing ring sleeve 2-22 and the sealing oil ring 2-23.

[0023] To further optimize the working efficiency of the present application and to reduce the ductility of the sealing ring sleeve 2-22 so that it tightly clamps the telescopic rod 1, fibers are buried inside the sealing ring sleeve 2-22. To further extend the service life, the steel scraping ring 2-21 and the base 2-12 are made of stainless steel.

[0024] As Figure 6 shown, during use, the long-life hydraulic cylinder sealing ring is installed between the upper opening of the cylinder body 3 and the telescopic rod 1, and the steel scraping ring 2-21 is oriented outward.

[0025] In summary, for the long-life hydraulic cylinder sealing ring of the present utility model embodiment, by adding the sealing ring body 2 between the outer edge of the opening of the cylinder body 3 and the telescopic rod 1, the steel scraping ring 2-21 of the sealing ring body 2 can scrape off the dust and other particles on the surface of the telescopic rod 1, effectively preventing sundries such as metal debris, quartz particles or dust particles from entering the interior through the gap between the telescopic rod 1 and the cylinder body 3 and damaging the sealing ring. At the same time, the spring steel plate 2-11 provides pressure to the steel scraping ring 2-21 and the sealing ring sleeve 2-22, further enhancing the sealing performance of the steel scraping ring 2-21 and the sealing ring sleeve 2-22 and the ability to remove sundries such as metal debris, quartz particles or dust particles, preventing sundries such as metal debris, quartz particles or dust particles from entering the cylinder and damaging the sealing ring during the operation of the telescopic rod, and effectively improving the service life of the hydraulic cylinder.

[0026] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A long-life hydraulic cylinder seal ring, comprising a telescopic rod (1) and a cylinder body (3), wherein the upper end opening of the cylinder body (3) is sleeved with the telescopic rod (1), and a seal ring body (2) is arranged between the upper end opening of the cylinder body (3) and the telescopic rod (1), characterized in that: The sealing ring body (2) further comprises a sealing ring reinforcement outer ring (2-1) and a sealing ring inner ring (2-2); spring steel plates (2-11) are arranged at equal intervals on the upper surface of the base (2-12) of the sealing ring reinforcement outer ring (2-1); the lower end of the spring steel plate (2-11) is inserted into the base (2-12); the spring steel plate (2-11) is inclined toward one side of the center of the base (2-12); a stepped limiting step (2-13) is provided on the lower side of the base (2-12) facing the center of the circle; and the base (2-12) is fixedly connected to the upper end opening of the oil cylinder body (3); The upper end of the sealing ring sleeve (2-22) of the sealing ring inner ring (2-2) is fixedly connected to the steel scraper ring (2-21), and the lower end of the sealing ring sleeve (2-22) is fixedly connected to the sealing oil ring (2-23). ​​A telescopic rod sleeve groove (2-24) is provided around the inner middle section of the sealing ring sleeve (2-22), and the sealing oil ring (2-23) is embedded in the oil ring groove preset on the inner side of the oil cylinder body (3); the base (2-12) is sleeved with the sealing ring sleeve (2-22), and the upper end of the spring steel plate (2-11) is against the lower edge of the steel scraper ring (2-21); and the telescopic rod sleeve groove (2-24) is preset with an oil ring.

2. The long-life hydraulic cylinder seal ring according to claim 1 is characterized in that: The steel scraper ring (2-21) is two left and right semi-arc steel sheets.

3. The long-life hydraulic cylinder seal ring according to claim 1 or 2, characterized in that: The top end of the spring steel plate (2-11) is fixedly connected to the lower edge of the steel scraper ring (2-21).

4. The long-life hydraulic cylinder seal ring according to claim 1, characterized in that: Fibers are embedded inside the sealing ring sleeve (2-22).

5. The long-life hydraulic cylinder seal ring according to claim 4 is characterized in that: The steel scraper ring (2-21) and the base (2-12) are made of stainless steel.

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