Adjusting compensation type high-pressure-resistant polyurethane sealing ring

Abstract

The utility model aims to provide an adjusting compensation type high-pressure-resistant polyurethane sealing ring, and belongs to the technical field of sealing. The adjusting compensation type high-pressure-resistant polyurethane sealing ring comprises an annular cylindrical sealing ring body, an annular sealing lip and an annular sealing gasket, the sealing lip is located on the inner side of the sealing ring body, and the axial centers of the sealing lip and the sealing ring body coincide. The hardness of the sealing lip is the same as that of the sealing ring body; the sealing gasket is located on the lower end face of the sealing ring body, and the axial centers of the sealing gasket and the sealing ring body coincide. The hardness of the sealing gasket is larger than the hardness of the sealing lip and the hardness of the sealing ring body. The hardness of the sealing ring body and the sealing lip is smaller than that of a sealing gasket, the elasticity is better, a gap between the polyurethane sealing ring and a rotating shaft rod after the polyurethane sealing ring is abraded can be made up more easily through elastic deformation, and the sealing effect is guaranteed; the sealing gasket is high in hardness and has better wear resistance; and the final service life of the polyurethane sealing ring can reach more than 150 hours.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to an adjustable and compensating high-pressure resistant polyurethane sealing ring. Background Technology

[0002] In oil drilling, sealing rings are crucial components for sealing rotating shafts. Due to the high pressure of the downhole environment (approximately 30-50 MPa), traditional rubber sealing rings require replacement after only 6-12 hours of use, resulting in frequent replacements, high operating costs, and reduced oil extraction efficiency. Therefore, industry professionals have developed polyurethane sealing rings, extending their service life to over 20 hours. However, downhole pressure fluctuations and friction between the rotating shaft and the sealing ring still accelerate wear and failure, making further extending their service life a pressing issue. Utility Model Content

[0003] This invention aims to provide an adjustable and compensating high-pressure resistant polyurethane sealing ring. The sealing ring body and sealing lip have lower hardness and better elasticity than the sealing gasket, making it easier to compensate for the gap between the polyurethane sealing ring and the rotating shaft after wear through elastic deformation, thus ensuring the sealing effect. The sealing gasket has higher hardness and better wear resistance. The final service life of the polyurethane sealing ring can reach more than 150 hours.

[0004] The technical solution adopted in this utility model is:

[0005] A high-pressure resistant polyurethane sealing ring with adjustable compensation, comprising:

[0006] The sealing ring body is in the shape of an annular cylinder;

[0007] The sealing lip is annular and located inside the sealing ring body, with their axial centers coinciding. The outer wall of the sealing lip is connected to the upper part of the inner wall of the sealing ring body. The sealing lip and the sealing ring body have the same hardness.

[0008] An annular sealing gasket is located at the lower end face of the sealing ring body, with their axial centers coinciding; the sealing gasket is connected to the sealing ring body; the inner diameter of the sealing gasket is the same as the inner diameter of the sealing ring body, and its outer diameter is the same as the inner diameter of the sealing ring body; the hardness of the sealing gasket is greater than that of the sealing lip and the sealing ring body.

[0009] Furthermore, the sealing ring body, the sealing lip, and the sealing gasket are integrally formed simultaneously.

[0010] Furthermore, the sealing lip is in the shape of a conical funnel, and the distance between its conical outer wall and the inner wall of the corresponding sealing ring body gradually increases.

[0011] Furthermore, starting from the outer side wall of the sealing ring body, the top of the sealing ring body has a conical surface, and the conical surface intersects with the conical inner wall surface of the sealing lip.

[0012] Furthermore, the Shore A hardness of the sealing gasket is 95-99 degrees.

[0013] Furthermore, the Shore A hardness of the sealing lip and the sealing ring body is 75~80 degrees.

[0014] The beneficial effects of this utility model are:

[0015] This invention designs an adjustable and compensating high-pressure resistant sealing ring, which consists of a sealing ring body, a sealing lip, and a sealing gasket support. The sealing ring body and sealing lip have lower hardness and better elasticity than the sealing gasket, making it easier to compensate for the gap between the polyurethane sealing ring and the rotating shaft after wear through elastic deformation, thus ensuring the sealing effect. The sealing gasket has higher hardness and better wear resistance. Therefore, the final service life of the polyurethane sealing ring can reach more than 150 hours. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the adjustable compensation type high-pressure resistant polyurethane sealing ring in the embodiment.

[0018] Figure 2 This is a top view of the adjustable compensation type high-pressure resistant polyurethane sealing ring in the embodiment.

[0019] Figure 3 This is a bottom view of the adjustable compensation type high-pressure resistant polyurethane sealing ring in the embodiment.

[0020] Figure 4 for Figure 1 Sectional view along the AA direction.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 1 .

[0022] Figure 6This is a schematic diagram of the three-dimensional structure of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 2 .

[0023] The attached figures are labeled as follows:

[0024] 100 - Sealing ring body, 110 - Conical surface, 200 - Sealing lip, 300 - Sealing gasket. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0027] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0028] Figure 1 This is a front view of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 2 This is a top view of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 3 This is a bottom view of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 4 for Figure 1 Sectional view along the AA direction. Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 1 . Figure 6 This is a schematic diagram of the three-dimensional structure of the adjustable compensation type high-pressure resistant sealing ring in the embodiment. Figure 2 .like Figures 1-6 As shown, the adjustable compensation type high-pressure resistant polyurethane seal ring includes an annular cylindrical seal ring body 100.

[0029] like Figure 4As shown, the inner side of the sealing ring body 100 is an annular sealing lip 200; the outer wall of the sealing lip 200 is connected to the upper part of the inner wall of the sealing ring body 100, forming a whole, and their axial centers coincide. When the rotating shaft passes through the inner area of ​​the sealing lip 200, the mutual cooperation between the sealing lip 200 and the sealing ring body 100 adjusts the clamping force of the polyurethane sealing ring on the rotating shaft in the constantly fluctuating downhole high-pressure environment of 30~50MPa; on the other hand, as the lip of the sealing lip 200 (i.e., the part that contacts and clamps the rotating shaft) wears continuously, the sealing lip 200 and the sealing ring body 100 can provide compensation through their own elastic deformation.

[0030] like Figure 4 As shown, the lower end face of the sealing ring body 100 is an annular sealing gasket 300; the sealing gasket 300 and the sealing ring body 100 are connected to form an integral whole, and their axial centers coincide; the inner diameter of the sealing gasket 300 is the same as the inner diameter of the sealing ring body 100, and the outer diameter of the sealing gasket 300 is the same as the inner diameter of the sealing ring body 100. Meanwhile, in this embodiment, the sealing gasket 300 is made of polyurethane, with a Shore A hardness of approximately 95-99 degrees; the sealing lip 200 and the sealing ring body 100 are also made of polyurethane, with the same hardness, a Shore A hardness of approximately 75-80 degrees; compared to the sealing lip 200 and the sealing ring body 100, the sealing gasket 300 has higher hardness and better wear resistance; compared to the sealing gasket 300, the sealing lip 200 and the sealing ring body 100 have better elasticity, making it easier to compensate for the gap between the polyurethane sealing ring and the rotating shaft after wear through elastic deformation, ensuring the sealing effect; therefore, the final service life of the polyurethane sealing ring can reach more than 150 hours.

[0031] Furthermore, in this embodiment, the sealing ring body 100, the sealing lip 200, and the sealing gasket 300 are integrally molded simultaneously, which can improve the overall stability of the structure.

[0032] Furthermore, in this embodiment, the sealing lip 200 is generally conical funnel-shaped, and the distance between its conical outer wall and the inner wall of the corresponding sealing ring body 100 gradually increases. In the initial state (i.e., before wear occurs), the lower edge of the conical funnel-shaped outlet of the sealing lip 200 is approximately flush with the lower edge of the sealing gasket 300. Thus, the empty area between the sealing lip 200 and the sealing ring body 100 can serve as a clearance space when the sealing lip 200 is deformed by compression. Furthermore, starting from the outer wall of the sealing ring body 100, the top of the sealing ring body 100 has a conical surface 110, which intersects with the conical inner wall surface of the sealing lip 200. Thus, it is equivalent to appropriately thinning at the connection between the sealing ring body 100 and the sealing lip 200, which is beneficial for the sealing lip 200 to deform and fill the gap.

Claims

1. A high-pressure resistant polyurethane sealing ring with adjustable compensation, characterized in that, include: The sealing ring body is in the shape of an annular cylinder; The sealing lip is annular and located inside the sealing ring body, with their axial centers coinciding. The outer wall of the sealing lip is connected to the upper part of the inner wall of the sealing ring body. The sealing lip and the sealing ring body have the same hardness. An annular sealing gasket is located at the lower end face of the sealing ring body, with their axial centers coinciding; the sealing gasket is connected to the sealing ring body; the inner diameter of the sealing gasket is the same as the inner diameter of the sealing ring body, and its outer diameter is the same as the inner diameter of the sealing ring body; the hardness of the sealing gasket is greater than that of the sealing lip and the sealing ring body.

2. The adjustable compensation type high-pressure resistant polyurethane sealing ring according to claim 1, characterized in that, The sealing ring body, the sealing lip, and the sealing gasket are integrally formed synchronously.

3. The adjustable compensation type high-pressure resistant polyurethane sealing ring according to claim 1, characterized in that, The sealing lip is in the shape of a conical funnel, and the distance between its conical outer wall and the inner wall of the corresponding sealing ring body gradually increases.

4. The adjustable compensation type high-pressure resistant polyurethane sealing ring according to claim 3, characterized in that, Starting from the outer side wall of the sealing ring body, the top of the sealing ring body has a conical surface, and the conical surface intersects with the conical inner wall surface of the sealing lip.

5. The adjustable compensation type high-pressure resistant polyurethane sealing ring according to any one of claims 1 to 4, characterized in that, The sealing gasket has a Shore A hardness of 95 to 99 degrees.

6. The adjustable compensation type high-pressure resistant polyurethane sealing ring according to claim 5, characterized in that, The Shore A hardness of the sealing lip and the sealing ring body is 75~80 degrees.

Images