Pressure-resistant polyether-ether-ketone sealing ring for excavator rod

Abstract

The pressure-resistant polyether-ether-ketone sealing ring for the excavator rod comprises a sealing ring located on the inner side of a cylinder cover, an outer ring abutting against the inner wall of a cylinder barrel is arranged on the sealing ring, a first inclined ring for blocking an end opening of the cylinder cover is arranged at the end of the outer ring, and a second inclined ring is arranged opposite to the first inclined ring. And a triangular chamber is formed between the first inclined ring and the second inclined ring. According to the pressure-resistant polyether-ether-ketone sealing ring for the excavator rod, dirt is blocked through the end portion of the first inclined ring, the oblique angle of the first inclined ring guides permeated dirt, one dirt diffuses towards the outer ring along the outer side of the first inclined ring but is still blocked by the outer ring, and the other dirt enters the triangular chamber along the side wall of the shaft. And finally, a third inclined ring is reserved to carry the bottom, so that the third inclined ring is matched with the outer ring to shield all seeping dirt particles, and the situation that the dirt particles intrude into the cylinder barrel to affect hydraulic work is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing components for excavator hydraulic cylinders, specifically to a pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator rods. Background Technology

[0002] The excavator boom extension power comes from the hydraulic cylinder drive, which has a piston rod driven by hydraulic oil, and the piston rod is used as the force to push, and the piston rod and the cylinder head at the cylinder port are slidably assembled with a sealing ring.

[0003] According to the public announcement number: CN221401191U, the public announcement date: 2024-07-23, an excavator boom cylinder is disclosed, including a sealing seat located on the outside of the piston rod, and a retaining ring, a bushing, two sealing rings and a skeleton oil seal are provided in the inner circular surface of the sealing seat to enhance the sealing effect and reduce the entry of external debris.

[0004] In the prior art, including the aforementioned patents, the environment in which excavators operate is mostly dusty and muddy. When the piston rod is working, it is inevitable that dirt will splash onto the surface of the piston rod, and large pieces of dirt may even accumulate at the cylinder head. Furthermore, as the piston rod extends and moves, its surface is usually covered with an oil film. When the telescopic rod retracts, the oil and dirt mix and erode the sealing ring, which leads to increased damage to the polyetheretherketone (PEEK) sealing ring and oil seal. In severe cases, smaller dirt particles can seep into the cylinder inside the oil seal along the oil film, thereby affecting the hydraulic operation and reducing the normal service life of each sealing ring and oil seal. Utility Model Content

[0005] The purpose of this invention is to provide a pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms, aiming to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pressure-resistant polyether ether ketone (PEEK) sealing ring for excavator booms includes a cylinder barrel with a cylinder head, a shaft sliding in the cylinder barrel, and a sealing ring located inside the cylinder head, wherein the sealing ring has an outer ring that abuts against the inner wall of the cylinder barrel.

[0008] The outer ring end is provided with a first oblique ring to block the cylinder head port, and a second oblique ring is arranged opposite to the first oblique ring, and a triangular chamber is formed between the first oblique ring and the second oblique ring.

[0009] The outer ring is also provided with a third oblique ring arranged opposite to the second oblique ring, and the third oblique ring is provided with a skeleton.

[0010] Preferably, it also includes a clamping ring that abuts against the outer wall of the first oblique ring.

[0011] Preferably, the outer ring has a retention groove that cooperates with the first oblique ring.

[0012] Preferably, the inner wall of the cylinder has an annular recess that communicates with the retention groove.

[0013] Preferably, the outer ring end is provided with an outer lip that abuts against the inner sidewall of the cylinder.

[0014] Preferably, the skeleton is provided with a flat section that mates with the outer lip.

[0015] Preferably, the skeleton is further provided with an inclined segment that cooperates with the third inclined ring.

[0016] Preferably, the end of the third oblique ring is provided with an inner retracting ring that slides with the end of the second oblique ring.

[0017] Preferably, the end of the inclined section is provided with a curved section that cooperates with the inner closing ring.

[0018] Preferably, the inner ring cooperates with the second oblique ring to form a sealed chamber.

[0019] In the above technical solution, the pressure-resistant polyether ether ketone sealing ring for excavator rods provided by this utility model has the following beneficial effects: the end of the first inclined ring blocks the dirt that seeps into the cylinder head, while the angle of the first inclined ring guides the seeping dirt. Firstly, it spreads along the outside of the first inclined ring to the outer ring, but is still blocked by the outer ring. Secondly, it enters the triangular chamber along the shaft side wall and is blocked by the second inclined ring. Finally, the third inclined ring is left to catch the bottom, so that the third inclined ring, together with the outer ring, can block all the seeping dirt particles, preventing dirt particles from entering the cylinder and affecting the hydraulic operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the cylinder and shaft assembly provided in an embodiment of the present utility model;

[0022] Figure 2 A side sectional view of the cylinder barrel, shaft, sealing ring, and clamping ring assembly provided in an embodiment of this utility model;

[0023] Figure 3 A schematic diagram of the position of the cylinder barrel, shaft, sealing ring, and clamping ring assembly side section provided for an embodiment of this utility model;

[0024] Figure 4 An exploded view of the sealing ring, clamping ring, and skeleton provided in the embodiments of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Cylinder barrel; 10. Shaft; 11. Cylinder head; 12. Ring recess; 2. Sealing ring; 21. Outer ring; 22. First oblique ring; 23. Second oblique ring; 24. Triangular chamber; 25. Retention groove; 26. Outer lip; 27. Third oblique ring; 28. Inner closing ring; 29. ​​Sealed chamber; 3. Skeleton; 31. Flat section; 32. Oblique section; 33. Bending section; 4. Clamping ring. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-4 As shown, a pressure-resistant polyether ether ketone sealing ring for excavator rods includes a cylinder 1 with a cylinder head 11, a shaft 10 sliding in the cylinder 1, and a sealing ring 2 located inside the cylinder head 11, with an outer ring 21 abutting against the inner wall of the cylinder 1 on the sealing ring 2.

[0029] The outer ring 21 is provided with a first oblique ring 22 at the end to block the cylinder head 11 port. The first oblique ring 22 is arranged with a second oblique ring 23 opposite to it, and a triangular chamber 24 is formed between the first oblique ring 22 and the second oblique ring 23.

[0030] The outer ring 21 is also provided with a third oblique ring 27 arranged opposite to the second oblique ring 23, and the third oblique ring 27 is provided with a skeleton 3.

[0031] Specifically, the sliding of shaft 10 through cylinder head 11 is existing technology and will not be described in detail here. The sealing ring 2 is specifically composed of elastic rubber materials such as polyetheretherketone, polytetrafluoroethylene, and fluororubber, which is also existing technology and will not be described in detail here.

[0032] Furthermore, the first inclined ring 22, the second inclined ring 23, and the third inclined ring 27 are all annular, and the first inclined ring 22 and the third inclined ring 27 have the same inclination angle, with the inclination angle facing the direction of dirt seepage to have a shovel-like blocking function. However, the inclination angle of the third inclined ring 27 is greater than that of the first inclined ring 22, so that the third inclined ring 27 can be closer to a state perpendicular to the axis 10 to perform the dirt blocking work.

[0033] Furthermore, the skeleton 3 is specifically an elastic metal ring, which is embedded in the sealing ring 2 to form the reinforcing function of the third oblique ring 27. At the same time, in the default state, the skeleton 3 keeps the outer ring 21 and the third oblique ring 27 in a supported state, so that the sealing ring 2 has a tight sealing function.

[0034] The outer ring 21 maintains contact with the inner wall of the cylinder 1, and the inner side of the end of the first oblique ring 22 contacts the side wall of the shaft 10, so that the sealing ring 2 maintains a stable sealing operation. At the same time, the end of the first oblique ring 22 is used to block the dirt that seeps into the cylinder head 11, while the oblique angle of the first oblique ring 22 guides the seeping dirt. Firstly, it spreads along the outside of the first oblique ring 22 to the outer ring 21, but is still blocked by the outer ring 21. Secondly, it enters the triangular chamber 24 along the side wall of the shaft 10 and is blocked by the second oblique ring 23. Finally, the third oblique ring 27 is left to catch the bottom, so that the third oblique ring 27, together with the outer ring 21, can block all the seeping dirt particles, preventing dirt particles from entering the inside of the cylinder 1 and affecting the hydraulic operation.

[0035] As a further embodiment of this utility model, it also includes a clamping ring 4 that abuts against the outer wall of the first oblique ring 22.

[0036] Specifically, the clamping ring 4 is a rubber ring made of materials such as nitrile rubber and polyurethane.

[0037] By having the clamp ring 4 with an arc-shaped rotating surface fit against the side wall of the first inclined ring 22, while also maintaining contact with the cylinder head 11, the clamp ring 4 can perform a basic sealing function and also apply pressure to the first inclined ring 22, making the contact surface between the inner side of the first inclined ring 22 and the shaft 10 larger, thereby improving the blocking effect of the triangular chamber 24 on dirt particles.

[0038] As another embodiment provided by this utility model, the outer ring 21 is provided with a retention groove 25 that cooperates with the first inclined ring 22.

[0039] When the dirt particles reach the outer wall of the outer ring 21 along the oblique angle of the first oblique ring 22, the dirt particles will enter the annular retention groove 25, so that the dirt particles are intercepted and the further seepage into the outer ring 21 is reduced.

[0040] As another embodiment further provided by this utility model, the inner sidewall of the cylinder 1 is provided with an annular recess 12 that communicates with the retention groove 25.

[0041] Specifically, the port length of the annular recess 12 is less than the port length of the retention groove 25.

[0042] The annular recess 12 provides a larger space for the retention groove 25 to accommodate dirt particles. When the annular recess 12 is in the lower position, even if the annular recess 12 with a small opening is full of dirt particles, it is still within the retention groove 25 and will not allow the dirt particles to continue to penetrate directly along the inner wall of the cylinder 1.

[0043] As another embodiment provided in this utility model, the outer ring 21 is provided with an outer lip 26 at its end, which abuts against the inner wall of the cylinder 1.

[0044] Specifically, the outer lip 26 has equidistantly arranged annular grooves on its outer side wall.

[0045] The outer lip 26 ensures a good seal between the outer ring 21 and the inner wall of the cylinder 1, while multiple annular grooves further enhance the ability to trap and retain dirt particles.

[0046] As another embodiment of this utility model, the skeleton 3 is provided with a flat section 31 that cooperates with the outer lip 26.

[0047] The flat section 31, which is inlaid parallel to the outer lip 26, strengthens the contact pressure on the inner wall of the cylinder 1 and maintains tightness under the action of elastic potential energy.

[0048] As another embodiment provided in this utility model, the skeleton 3 is also provided with an inclined segment 32 that cooperates with the third inclined ring 27.

[0049] The inclined section 32, which is installed in an inlay, ensures the elasticity of the third inclined ring 27 and also ensures the clamping ability of the end of the third inclined ring 27.

[0050] As another embodiment provided in this utility model, the end of the third oblique ring 27 is provided with an inner closing ring 28 that slides with the end of the second oblique ring 23.

[0051] As more and more dirt particles accumulate outside the angle of the first inclined ring 22, pressure is applied to the end of the outer ring 21, causing the second inclined ring 23 to actively slide inward toward the outer wall of the inner ring 28. Therefore, the combination of the two can also ensure the contact seal against the side wall of the shaft 10, while also increasing the area of ​​elastic rubber in direct contact with the side wall of the shaft 10 (i.e., the exposure of the side wall of the shaft 10 between the two is blocked), which is used to improve the sealing area.

[0052] As another embodiment provided in this utility model, the end of the inclined section 32 is provided with a curved section 33 that cooperates with the inner closing ring 28.

[0053] Specifically, the inclined section 32, the flat section 31, and the curved section 33 are integrally formed, and the inner ring 28 is an extended and curved rubber section of the third inclined ring 27.

[0054] The inner retaining ring 28 is reinforced by the bending section 33, so that the bending section 33 maintains the pressure effect on the second oblique ring 23 under the action of elasticity, thus ensuring the stability of the sealing surface formation.

[0055] As another embodiment further provided in this utility model, the inner ring 28 cooperates with the second oblique ring 23 to form a sealed chamber 29.

[0056] Specifically, the sealed chamber 29 is located in the space between the third inclined ring 27 and the second inclined ring 23, and the sealed chamber 29 is opened and closed when the second inclined ring 23 actively slides.

[0057] When the second inclined ring 23 is not moved, the sealed chamber 29 is kept open, which allows a small amount of dirt particles that are not completely intercepted by the triangular chamber 24 to enter the sealed chamber 29. After the amount of dirt particles increases, the sealed chamber 29 closes and stores the dirt particles, which makes it easier to dispose of the dirt particles uniformly when the sealing ring 2 is removed later.

[0058] Working principle: The outer ring 21 maintains contact with the inner wall of the cylinder 1, and the inner side of the end of the first oblique ring 22 contacts the side wall of the shaft 10, so that the sealing ring 2 maintains a stable sealing operation. At the same time, the end of the first oblique ring 22 is used to block the dirt that seeps into the cylinder head 11, while the oblique angle of the first oblique ring 22 guides the seeping dirt. Firstly, it spreads along the outside of the first oblique ring 22 to the outer ring 21, but is still blocked by the outer ring 21. Secondly, it enters the triangular chamber 24 along the side wall of the shaft 10 and is blocked by the second oblique ring 23. Finally, the third oblique ring 27 is left to catch the bottom, so that the third oblique ring 27, together with the outer ring 21, can block all the seeping dirt particles.

[0059] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms, comprising a cylinder (1) with a cylinder head (11), wherein a shaft (10) slides within the cylinder (1), characterized in that, It also includes a sealing ring (2) located inside the cylinder head (11), and the sealing ring (2) is provided with an outer ring (21) that abuts against the inner wall of the cylinder barrel (1); The outer ring (21) is provided with a first oblique ring (22) at the end to block the cylinder head (11) port. The first oblique ring (22) is provided with a second oblique ring (23) opposite to it, and a triangular chamber (24) is formed between the first oblique ring (22) and the second oblique ring (23). The outer ring (21) is also provided with a third oblique ring (27) arranged opposite to the second oblique ring (23), and the third oblique ring (27) is provided with a skeleton (3).

2. The pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 1, characterized in that, It also includes a clamping ring (4) that engages with the outer wall of the first oblique ring (22).

3. The pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 1, characterized in that, The outer ring (21) is provided with a retention groove (25) that cooperates with the first inclined ring (22).

4. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 3, characterized in that, The inner wall of the cylinder (1) is provided with an annular recess (12) that communicates with the retention groove (25).

5. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 3, characterized in that, The outer ring (21) has an outer lip (26) at its end that abuts against the inner wall of the cylinder (1).

6. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 5, characterized in that, The skeleton (3) is provided with a flat section (31) that matches the outer lip (26).

7. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 5, characterized in that, The skeleton (3) is also provided with an inclined section (32) that cooperates with the third inclined ring (27).

8. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 7, characterized in that, The third oblique ring (27) is provided with an inner closing ring (28) that slides with the end of the second oblique ring (23).

9. A pressure-resistant polyetheretherketone (PEEK) sealing ring for excavator booms according to claim 8, characterized in that, The inclined section (32) is provided with a curved section (33) at its end that cooperates with the inner closing ring (28).

10. A pressure-resistant polyetheretherketone (PEEK) sealing ring for an excavator boom according to claim 9, characterized in that, The inner ring (28) cooperates with the second oblique ring (23) to form a sealed chamber (29).

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