A low-wear hydraulic piston seal arrangement

Abstract

The utility model discloses a low abrasion's hydraulic piston sealing structure, include: piston connecting rod, piston connecting rod one end is equipped with the piston head, and the one end of piston head outside is embedded with seal ring no.

Description

Technical Field

[0001] This utility model relates to the field of piston equipment technology, specifically a low-wear hydraulic piston sealing structure. Background Technology

[0002] A piston is a mechanical component, usually cylindrical, that plays a crucial role in many mechanical systems, especially in reciprocating engines and compressors. In hydraulic systems, the piston is also one of the most important structures.

[0003] Hydraulic pistons can convert hydraulic energy into mechanical energy to achieve linear reciprocating motion or oscillation, thereby completing various work tasks. Hydraulic pistons need to have good sealing performance when in use, but the existing sealing structure of hydraulic pistons has poor sealing performance and is inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a low-wear hydraulic piston sealing structure to solve the problem that the existing hydraulic piston sealing structure has poor sealing performance and is inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-wear hydraulic piston sealing structure, comprising: a piston connecting rod, a piston head sleeved on one end of the piston connecting rod, a sealing ring 1 embedded on one outer end of the piston head, a sealing ring 2 embedded on the other outer end of the piston head, a piston guide ring embedded in the middle of the outer side of the piston head, and an inner sealing ring embedded between the piston connecting rod and the piston head, wherein the sealing ring 1 and the sealing ring 2 have the same specifications and model.

[0006] As a further embodiment of this utility model: the piston connecting rod includes a piston rod body, one end of the piston rod body is fixedly provided with an adapter ring, the other end of the piston rod body is fixedly provided with a piston head insertion rod, one end of the piston head insertion rod is provided with an inner sealing ring groove, the other end of the piston head insertion rod is screwed with a piston head locking nut, and the inner sealing ring groove is a T-shaped cross-section annular groove.

[0007] As a further embodiment of this utility model: the piston head includes a piston head body, a sealing ring groove is provided at one end of the outer side of the piston head body, a guide ring groove is provided in the middle of the outer side of the piston head body, a sealing ring groove is provided at the other end of the outer side of the piston head body, and a through hole for inserting rod is provided inside the piston head body, with an inner sealing ring groove for inserting rod at one end of the inner side of the through hole.

[0008] As a further embodiment of this utility model: the sealing ring includes an outer sealing ring body, an O-ring is fixedly disposed in the middle of the inner side of the outer sealing ring body, a deep trapezoidal groove is formed inside the upper part of the outer sealing ring body, and two sets of deep trapezoidal grooves are formed. The outer sealing ring body is made of polytetrafluoroethylene material, and the thickness of the outer sealing ring body is slightly wider than the sealing ring groove. The O-ring is adapted to be embedded in the sealing ring groove.

[0009] As a further embodiment of this utility model: the piston guide ring includes a guide ring body, and an O-ring is fixedly disposed in the middle of the inner side of the guide ring body. The guide ring body is made of polytetrafluoroethylene, and the O-ring is adapted to be embedded in the groove of the guide ring.

[0010] As a further embodiment of this utility model: the inner sealing ring includes an inner sealing ring body, an inner arc surface ring is fixedly provided at one end of the inner inner sealing ring body, an outer arc surface ring is fixedly provided at one end of the outer outer side of the inner sealing ring body, an inner sealing convex ring is fixedly provided at one end of the inner sealing ring body, a shallow trapezoidal annular groove is provided at one end of the inner sealing convex ring, and two sets of both the inner sealing convex ring and the shallow trapezoidal annular groove are provided. The inner inner side of the inner sealing ring body and the inner arc surface ring are adapted to be embedded in the inner sealing ring groove one, and the outer arc surface ring is adapted to be embedded in the inner sealing ring groove two.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the inner sealing ring is nested in the inner sealing ring groove of the T-shaped cross-section structure. At this time, the inner arc surface ring is embedded in the narrow inner ring of the inner sealing ring groove of the T-shaped cross-section structure, while the inner sides of the upper and lower sets of inner sealing convex rings are attached to the wide inner ring of the inner sealing ring groove of the T-shaped cross-section structure. Then, the piston head is placed on the piston head insertion rod until the outer arc surface ring is embedded in the inner sealing ring groove of the second stage. At this time, the outer sides of the upper and lower sets of inner sealing convex rings are attached to the surface of the insertion rod through hole. When the hydraulic oil enters the two sets of shallow trapezoidal ring grooves, it can push the two sides of the inner sealing convex rings outward. This structure can achieve a better sealing effect.

[0013] In this invention, by embedding an O-ring into a sealing ring groove, the two inner ends of the outer sealing ring will fit against the outer surface of the piston head. Firstly, the outer sealing ring and guide ring made of polytetrafluoroethylene can reduce wear. At the same time, when hydraulic oil enters the deep trapezoidal ring groove, it can push the two sides of the outer sealing ring outward, thus further improving the sealing effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the low-wear hydraulic piston sealing structure described in this utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of a low-wear hydraulic piston sealing structure according to the present invention;

[0016] Figure 3 This is a schematic diagram of the piston connecting rod in the low-wear hydraulic piston sealing structure described in this utility model;

[0017] Figure 4 This is a schematic diagram of the piston head in the low-wear hydraulic piston sealing structure described in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the sealing ring one in the low-wear hydraulic piston sealing structure described in this utility model;

[0019] Figure 6 This is a schematic diagram of the piston guide ring in a low-wear hydraulic piston sealing structure according to the present invention;

[0020] Figure 7 This is a schematic diagram of the inner sealing ring in a low-wear hydraulic piston sealing structure described in this utility model.

[0021] In the diagram: 1. Piston connecting rod; 2. Piston head; 3. Sealing ring one; 4. Sealing ring two; 5. Piston guide ring; 6. Inner sealing ring; 10. Piston rod body; 11. Adapter ring; 12. Piston head insertion rod; 13. Inner sealing ring groove one; 14. Piston head locking nut; 20. Piston head body; 21. Sealing ring groove one; 22. Guide ring groove; 23. Sealing ring groove two; 24. Insert rod through hole; 25. Inner sealing ring groove two; 30. Outer sealing ring body; 31. O-ring one; 32. Deep trapezoidal ring groove; 50. O-ring two; 51. Guide ring body; 60. Inner sealing ring body; 61. Inner arc surface ring; 62. Outer arc surface ring; 63. Inner sealing convex ring; 64. Shallow trapezoidal ring groove. Detailed Implementation

[0022] 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.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0024] Reference Figure 1 and Figure 2 In this embodiment of the present invention, a low-wear hydraulic piston sealing structure includes: a piston connecting rod 1, a piston head 2 sleeved on one end of the piston connecting rod 1, a sealing ring 3 embedded on one outer end of the piston head 2, a sealing ring 4 embedded on the other outer end of the piston head 2, a piston guide ring 5 embedded in the middle of the outer side of the piston head 2, and an inner sealing ring 6 embedded between the piston connecting rod 1 and the piston head 2. The sealing ring 3 and the sealing ring 4 have the same specifications and model.

[0025] Reference Figure 3 The piston connecting rod 1 includes a piston rod body 10. One end of the piston rod body 10 is fixedly provided with a transition ring 11, and the other end of the piston rod body 10 is fixedly provided with a piston head insertion rod 12. One end of the piston head insertion rod 12 is provided with an inner sealing ring groove 13, and the other end of the piston head insertion rod 12 is screwed with a piston head locking nut 14. The inner sealing ring groove 13 is a T-shaped cross-section annular groove.

[0026] Reference Figure 4 The piston head 2 includes a piston head body 20. A sealing ring groove 21 is provided at one outer end of the piston head body 20. A guide ring groove 22 is provided in the middle of the outer side of the piston head body 20. A sealing ring groove 23 is provided at the other outer end of the piston head body 20. A rod through hole 24 is provided inside the piston head body 20. An inner sealing ring groove 25 is provided at one inner end of the rod through hole 24.

[0027] Reference Figure 5The sealing ring 3 includes an outer sealing ring body 30. An O-ring 31 is fixedly installed in the middle of the inner side of the outer sealing ring body 30. A deep trapezoidal annular groove 32 is opened inside the upper part of the outer sealing ring body 30. There are two sets of deep trapezoidal annular grooves 32. The outer sealing ring body 30 is made of polytetrafluoroethylene. The thickness of the outer sealing ring body 30 is slightly wider than the sealing ring groove 21. The O-ring 31 is adapted to be embedded in the sealing ring groove 21.

[0028] The above solution utilizes an outer sealing ring 30 and a guide ring 51 made of polytetrafluoroethylene (PTFE) to reduce wear. Additionally, when hydraulic oil enters the deep trapezoidal annular groove 32, it can push the outer sealing ring 30 outwards from both sides, thereby further improving the sealing effect.

[0029] Reference Figure 6 The piston guide ring 5 includes a guide ring body 51, and an O-ring 50 is fixedly disposed in the middle of the inner side of the guide ring body 51. The guide ring body 51 is made of polytetrafluoroethylene, and the O-ring 50 is adapted to be embedded in the guide ring groove 22.

[0030] Reference Figure 7 The inner sealing ring 6 includes an inner sealing ring body 60. An inner arc surface ring 61 is fixedly provided at one inner end of the inner sealing ring body 60, and an outer arc surface ring 62 is fixedly provided at one outer end of the inner sealing ring body 60. An inner sealing convex ring 63 is fixedly provided at one upper end of the inner sealing ring body 60. A shallow trapezoidal annular groove 64 is provided at one end of the inner sealing convex ring 63. There are two sets of both the inner sealing convex ring 63 and the shallow trapezoidal annular groove 64. The inner side of the inner sealing ring body 60 and the inner arc surface ring 61 are adapted to be embedded in the inner sealing ring groove 13, and the outer arc surface ring 62 is adapted to be embedded in the inner sealing ring groove 25.

[0031] The above scheme involves nesting the inner sealing ring 6 within the inner sealing ring groove 13 of the T-shaped cross-section structure. The inner arc surface ring 61 is embedded in the narrow inner ring of the inner sealing ring groove 13, while the inner sides of the upper and lower sets of inner sealing convex rings 63 are fitted against the wide inner ring of the inner sealing ring groove 13. The piston head 2 is then fitted onto the piston head insertion rod 12 until the outer arc surface ring 62 is embedded in the inner sealing ring groove 25. At this point, the outer sides of the upper and lower sets of inner sealing convex rings 63 are fitted against the surface of the insertion rod through hole 24. When hydraulic oil enters the two shallow trapezoidal ring grooves 64, it can push the inner sealing convex rings 63 outwards on both sides. This structure provides a better sealing effect.

[0032] The working principle of this utility model is as follows: During use, the inner sealing ring 6 is nested in the inner sealing ring groove 13 of the T-shaped cross-section structure. At this time, the inner arc surface ring 61 is embedded in the narrow inner ring of the inner sealing ring groove 13 of the T-shaped cross-section structure, while the inner sides of the upper and lower sets of inner sealing convex rings 63 are attached to the wide inner ring of the inner sealing ring groove 13 of the T-shaped cross-section structure. Then, the piston head 2 is fitted onto the piston head insertion rod 12 until the outer arc surface ring 62 is embedded in the inner sealing ring groove 25. At this time, the outer sides of the upper and lower sets of inner sealing convex rings 63 are attached to the surface of the insertion rod through hole 24. When hydraulic oil enters the two sets of shallow trapezoidal annular grooves 64, it can push the two sides of the inner sealing convex ring 63 outward, thus achieving a better sealing effect. By embedding the O-ring 31 into the sealing ring groove 21, the two ends of the inner side of the outer sealing ring body 30 will fit against the outer surface of the piston head body 20. Firstly, the outer sealing ring body 30 and the guide ring body 51, made of polytetrafluoroethylene, can reduce wear. At the same time, when hydraulic oil enters the deep trapezoidal annular groove 32, it can push the two sides of the outer sealing ring 30 outward, thus further improving the sealing effect.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-wear hydraulic piston seal structure, characterized in that, include: Piston connecting rod (1), piston head (2) is sleeved on one end of piston connecting rod (1), sealing ring 1 (3) is embedded on one side of piston head (2), sealing ring 2 (4) is embedded on the other side of piston head (2), piston guide ring (5) is embedded in the middle of the outside of piston head (2), and inner sealing ring (6) is embedded between piston connecting rod (1) and piston head (2). The sealing ring 1 (3) and sealing ring 2 (4) have the same specifications and model.

2. The low-wear hydraulic piston sealing structure according to claim 1, characterized in that, The piston connecting rod (1) includes a piston rod body (10). One end of the piston rod body (10) is fixedly provided with a transition ring (11), and the other end of the piston rod body (10) is fixedly provided with a piston head insertion rod (12). One end of the piston head insertion rod (12) is provided with an inner sealing ring groove (13), and the other end of the piston head insertion rod (12) is screwed with a piston head locking nut (14). The inner sealing ring groove (13) is a T-shaped cross-section annular groove.

3. The low-wear hydraulic piston sealing structure according to claim 1, characterized in that, The piston head (2) includes a piston head body (20). A sealing ring groove (21) is provided at one end of the outer side of the piston head body (20). A guide ring groove (22) is provided in the middle of the outer side of the piston head body (20). A sealing ring groove (23) is provided at the other end of the outer side of the piston head body (20). A rod insertion hole (24) is provided through the inside of the piston head body (20). An inner sealing ring groove (25) is provided at one end of the inner side of the rod insertion hole (24).

4. The low-wear hydraulic piston seal structure according to claim 1, characterized in that, The sealing ring (3) includes an outer sealing ring body (30), an O-ring (31) is fixedly provided in the middle of the inner side of the outer sealing ring body (30), and a deep trapezoidal annular groove (32) is provided in the upper part of the outer sealing ring body (30). There are two sets of deep trapezoidal annular grooves (32). The outer sealing ring body (30) is made of polytetrafluoroethylene.

5. The low-wear hydraulic piston seal structure according to claim 1, characterized in that, The piston guide ring (5) includes a guide ring body (51), and an O-ring (50) is fixedly disposed in the middle of the inner side of the guide ring body (51). The guide ring body (51) is made of polytetrafluoroethylene.

6. The low-wear hydraulic piston seal structure according to claim 1, characterized in that, The inner sealing ring (6) includes an inner sealing ring body (60). An inner arc surface ring (61) is fixedly provided at one end of the inner side of the inner sealing ring body (60), and an outer arc surface ring (62) is fixedly provided at one end of the outer side of the inner sealing ring body (60). An inner sealing convex ring (63) is fixedly provided at one end of the inner sealing ring body (60). A shallow trapezoidal ring groove (64) is provided at one end of the inner sealing convex ring (63). There are two sets of both the inner sealing convex ring (63) and the shallow trapezoidal ring groove (64).

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