High-pressure-resistant sealing element for hydraulic servo system

Abstract

The utility model discloses a high pressure resistant sealing element for a hydraulic servo system, which comprises a shell, one end of the shell is connected with a piston rod penetrating through and extending into the shell in a penetrating manner, a pressure resistant mechanism is arranged in one side of the shell, and the pressure resistant mechanism comprises a U-shaped groove, a piston rod sealing gasket, a second mounting groove and a second pressure resistant ring, a U-shaped groove is formed in the middle of the inner wall of the shell, a piston rod sealing gasket attached to the piston rod is installed on the inner wall of the U-shaped groove, a second installation groove is formed in the other side of the inner wall of the shell, and a second pressure-resistant ring attached to the piston rod is installed on the inner wall of the second installation groove. The U-shaped groove and the second mounting groove are formed in the inner wall of the shell, and the piston rod sealing gasket and the second pressure-resistant ring are mounted on the inner wall of the U-shaped groove and the inner wall of the second mounting groove correspondingly, so that the sealing and pressure-resistant effects are achieved when the piston rod and the shell move, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of high-pressure resistant seals for hydraulic servo systems, specifically a high-pressure resistant seal for hydraulic servo systems. Background Technology

[0002] A hydraulic servo system refers to a system whose output changes in response to changes in input. When in use, a hydraulic servo system requires the installation of high-pressure resistant seals.

[0003] Currently, when high-pressure resistant seals are subjected to pressure, a pressure-resistant sealing mechanism is generally set at the connection between the housing and the piston. However, no such mechanism is set between the housing and the piston rod. Therefore, air may leak from the gap at the connection of the piston rod during operation, which reduces its working efficiency. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a high-pressure resistant seal for hydraulic servo systems, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, this utility model proposes a high-pressure resistant seal for a hydraulic servo system, comprising a housing, wherein a piston rod is inserted and connected to one end of the housing and extends into the housing;

[0006] The housing has a pressure-resistant mechanism on one side, which includes a U-shaped groove, a piston rod sealing gasket, a second mounting groove, and a second pressure-resistant ring. The U-shaped groove is located in the middle of the inner wall of the housing, and a piston rod sealing gasket that fits against the piston rod is installed on the inner wall of the U-shaped groove. The housing has a second mounting groove on the other side of the inner wall, and a second pressure-resistant ring that fits against the piston rod is installed on the inner wall of the second mounting groove.

[0007] In one example, a trapezoidal groove is formed on one side of the inner wall of the housing, and the trapezoidal groove is located to the right of the U-shaped groove.

[0008] In one example, a dustproof ring is installed on the inner wall of the trapezoidal groove, and the dustproof ring is sleeved with the piston rod.

[0009] In one example, the piston rod is fitted with a piston member on its outer ring inside the housing, and the inner wall of the piston member has a first annular groove, on which an O-ring is installed to fit the piston rod.

[0010] In one example, a second annular groove is formed in the middle of the outer ring of the piston component, and a piston sealing gasket is installed on the inner wall of the second annular groove, the piston sealing gasket being connected to the inner wall of the housing.

[0011] In one example, the outer ring of the piston has two first mounting grooves, and the inner walls of the two first mounting grooves are each fitted with a first pressure-resistant ring that connects to the housing.

[0012] The high-pressure resistant sealing component for hydraulic servo systems proposed in this utility model can bring the following beneficial effects:

[0013] 1. A high-pressure resistant seal for a hydraulic servo system, wherein a U-shaped groove and a second mounting groove are provided on the inner wall of the housing, and a piston rod sealing gasket and a pressure-resistant ring are respectively installed on the inner walls of the U-shaped groove and the second mounting groove, thereby providing a sealing and pressure-resistant effect when the piston rod and the housing move together, thus improving the service life.

[0014] 2. This high-pressure resistant seal for hydraulic servo systems forms a vacuum cavity between the piston and the housing when the piston moves. At this time, the vacuum cavity will generate a certain pressure, which will squeeze the piston. The pressure is offset by the first pressure-resistant ring installed on the outer ring of the piston, thereby reducing the pressure on the piston and increasing its service life. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

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

[0017] Figure 2 This is a schematic cross-sectional view of the shell structure of this utility model;

[0018] Figure 3 This is an enlarged structural diagram of structure A of this utility model;

[0019] Figure 4 This is an enlarged schematic diagram of structure B of this utility model.

[0020] In the diagram: 1. Housing; 2. Piston rod; 3. Trapezoidal groove; 4. Dustproof ring; 5. U-shaped groove; 6. Piston rod sealing gasket; 7. Piston component; 8. First mounting groove; 9. First pressure-resistant ring; 10. First annular groove; 11. O-ring; 12. Piston sealing gasket; 13. Second mounting groove; 14. Second pressure-resistant ring; 15. Second annular groove. Detailed Implementation

[0021] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0022] like Figures 1-4As shown, an embodiment of this utility model proposes a high-pressure resistant seal for a hydraulic servo system, including a housing 1, with a piston rod 2 that passes through and extends into the housing 1 at one end;

[0023] A pressure-resistant mechanism is provided inside one side of the housing 1, and the pressure-resistant mechanism includes a U-shaped groove 5, a piston rod sealing gasket 6, a second mounting groove 13, and a second pressure-resistant ring 14. A U-shaped groove 5 is provided in the middle of the inner wall of the housing 1, and a piston rod sealing gasket 6 that fits against the piston rod 2 is installed on the inner wall of the U-shaped groove 5. A second mounting groove 13 is provided on the other side of the inner wall of the housing 1, and a second pressure-resistant ring 14 that fits against the piston rod 2 is installed on the inner wall of the second mounting groove 13.

[0024] Specifically, a trapezoidal groove 3 is provided on one side of the inner wall of the housing 1. The trapezoidal groove 3 is located on the right side of the U-shaped groove 5. The piston rod sealing gasket 6 is fixed through the U-shaped groove 5, and the trapezoidal groove 3 is used to fix the dustproof ring 4.

[0025] Specifically, a dustproof ring 4 is installed on the inner wall of the trapezoidal groove 3. The dustproof ring 4 is sleeved with the piston rod 2. The dustproof ring 4 blocks the dust on the surface of the piston rod 2, preventing it from entering the housing 1.

[0026] Specifically, the piston rod 2 is fitted with a piston component 7 on the outer ring inside the housing 1. The inner wall of the piston component 7 has a first annular groove 10. An O-ring 11 that fits against the piston rod 2 is installed on the inner wall of the first annular groove 10. The piston component 7 and the piston rod 2 slide between each other through the O-ring 11.

[0027] Specifically, a second annular groove 15 is provided in the middle of the outer ring of the piston component 7. A piston sealing gasket 12 is installed on the inner wall of the second annular groove 15. The piston sealing gasket 12 is connected to the inner wall of the housing 1. The piston sealing gasket 12 is installed through the second annular groove 15, and the piston sealing gasket 12 performs a sealing function between the piston component 7 and the housing 1.

[0028] Specifically, the outer ring of the piston component 7 has two first mounting grooves 8, and the inner walls of the two first mounting grooves 8 are each fitted with a first pressure-resistant ring 9 that connects to the housing 1. The first pressure-resistant ring 9 provides pressure resistance when the piston component 7 moves.

[0029] Working principle: A U-shaped groove 5 and a second mounting groove 13 are provided on the inner wall of the housing 1. A piston rod sealing gasket 6 and a second pressure-resistant ring 14 are respectively installed on the inner walls of the U-shaped groove 5 and the second mounting groove 13, thereby providing a sealing and pressure-resistant effect when the piston rod 2 and the housing 1 move. At the same time, a first annular groove 10 and a second annular groove 15 are respectively provided on the inner wall and outer ring of the piston 7. An O-ring 11 and a piston sealing gasket 12 are installed in the first annular groove 10 and the second annular groove 15 to facilitate the sliding of the piston 7. At the same time, a first mounting groove 8 is provided on the outer ring of the piston 7, and a first pressure-resistant ring 9 is installed in the first mounting groove 8. When the piston 7 moves, a vacuum cavity is formed in the housing 1, which applies pressure. The pressure is offset by the first pressure-resistant ring 9, thereby increasing its service life and improving working efficiency.

[0030] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0031] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A high-pressure resistant seal for a hydraulic servo system, comprising a housing (1), wherein a piston rod (2) is inserted and connected to one end of the housing (1) and extends into the housing (1). Its features are: The housing (1) has a pressure-resistant mechanism inside one side, and the pressure-resistant mechanism includes a U-shaped groove (5), a piston rod sealing gasket (6), a second mounting groove (13), and a second pressure-resistant ring (14). The U-shaped groove (5) is opened in the middle of the inner wall of the housing (1), and the piston rod sealing gasket (6) that fits with the piston rod (2) is installed on the inner wall of the U-shaped groove (5). The second mounting groove (13) is opened on the other side of the inner wall of the housing (1), and the second pressure-resistant ring (14) that fits with the piston rod (2) is installed on the inner wall of the second mounting groove (13).

2. A high-pressure resistant seal for a hydraulic servo system according to claim 1, characterized in that: A trapezoidal groove (3) is provided on one side of the inner wall of the housing (1), and the trapezoidal groove (3) is located to the right of the U-shaped groove (5).

3. A high-pressure resistant seal for a hydraulic servo system according to claim 2, characterized in that: The inner wall of the trapezoidal groove (3) is fitted with a dustproof ring (4), which is sleeved with the piston rod (2).

4. A high-pressure resistant seal for a hydraulic servo system according to claim 1, characterized in that: The piston rod (2) is fitted with a piston component (7) on the outer ring inside the housing (1). The inner wall of the piston component (7) has a first annular groove (10) and an O-ring (11) that fits against the piston rod (2) is installed on the inner wall of the first annular groove (10).

5. A high-pressure resistant seal for a hydraulic servo system according to claim 4, characterized in that: The piston component (7) has a second annular groove (15) in the middle of its outer ring. A piston sealing gasket (12) is installed on the inner wall of the second annular groove (15). The piston sealing gasket (12) is connected to the inner wall of the housing (1).

6. A high-pressure resistant seal for a hydraulic servo system according to claim 5, characterized in that: The piston (7) has two first mounting grooves (8) on its outer ring, and the inner walls of the two first mounting grooves (8) are each fitted with a first pressure-resistant ring (9) that connects with the housing (1).

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