High-pressure reinforcing piston
By setting multiple conical holes and acute R-angle design on the piston body, the problem of insufficient pressure bearing capacity of traditional pistons in ultra-high pressure environments is solved, the sealing performance and lubrication effect are improved, and the service life of the piston is extended.
Patent Information
- Application Number
- CN202422121145.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Traditional pistons have insufficient pressure bearing capacity in ultra-high pressure environments, and their sealing performance is degraded, resulting in serious wear and affecting drilling efficiency.
A high-pressure reinforced piston is designed, with multiple conical holes on the piston body, which incline radially along the piston to form a multi-stage support structure, and an acute angle and an R angle are set between the conical holes to enhance sealing and lubrication performance.
It improves the sealing, lubrication and wear resistance of the piston, extends the service life of the piston, and ensures stable operation in high-pressure and high-temperature environments.
Smart Images
Figure CN223089527U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-pressure pump accessories, and specifically relates to a high-pressure reinforced piston. Background Technique
[0002] Traditional pistons are divided into cast integral vulcanized open (U-groove) pistons, such as Figure 1 shown and split assembled pistons such as Figure 2 shown; under normal pressure conditions, they have good expansion compensation functions, but in an ultra-high pressure environment, the pressure-bearing capacity is insufficient during forward pushing, the middle part of the U-shape bulges, and inward curling occurs at the port seal, resulting in failure. The existing integral vulcanized flat-end external chamfer design pistons, such as Figure 3 shown, have good pressure-bearing capacity, but cannot achieve expansion compensation, and can only achieve sealing by limited interference fit, with a short service life, and the designed included angle is prone to squeezing in mud particles. During the reciprocating motion of the piston at high pressure and high speed, a large amount of the outer circle of the piston is worn off and lost, making the piston diameter smaller, resulting in premature friction between the mud pump and the cylinder liner, causing the piston to fail. At present, the piston cup has poor lubricating oil storage capacity, resulting in poor lubrication performance of the cylinder liner piston friction pair, which is also an important reason for serious piston wear and failure. Through observation during the test process, it is found that although the piston does not fail, due to the micro-wear of the piston, the sealing performance of the piston decreases, resulting in a decrease in the pressure and flow rate of the discharged drilling fluid, affecting the entire drilling efficiency. Content of the Utility Model
[0003] The purpose of the utility model is to provide a high-pressure reinforced piston to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solution: a high-pressure reinforced piston, including a piston body, and a vulcanized layer is provided on the piston body; a tapered hole with a tapered cross-section is provided on the vulcanized layer, and the apex of the tapered hole extends towards the piston; the number of the tapered holes is multiple, and the multiple tapered holes are circumferentially arranged on the vulcanized layer.
[0005] As a preferred technical solution of the utility model: the tapered hole includes a first inclined surface that inclines radially outward along the piston body and a second inclined surface that inclines radially inward along the piston body, and a flat surface is provided between the first inclined surface and the second inclined surface.
[0006] As a preferred technical solution of the utility model: an included angle a is formed between the first inclined surface and the second inclined surface, and the included angle a is an acute angle.
[0007] As a preferred technical solution of the utility model: the angle value of the included angle a is 30°.
[0008] As a preferred technical solution of the present utility model: R corners are provided between one end of the plane and the first inclined plane and between the other end of the plane and the second inclined plane.
[0009] As a preferred technical solution of the present utility model: the angular value of the R corner is b; wherein, 60° ≤ b ≤ 80°.
[0010] As a preferred technical solution of the present utility model: the angular value b of the R corner is 75°.
[0011] By adopting the above technical solution, the beneficial effect of the present utility model is that: the ribs between multiple conical holes are used to make the entire sealing interface form a multi-stage support structure, effectively preventing the problem that the original fully open piston bulges outwards due to high pressure and finally penetrates; and each conical hole can expand outwards to different degrees with the size of the fluid pressure. This expansion not only compensates for the wear of the polyurethane sealing surface itself but also enhances the sealing performance; based on this, adding multiple conical holes with a conical cross-section on the surface of the vulcanized layer can improve the sealing, lubrication, and wear resistance of the piston, play a reinforcing role when working under high pressure and high temperature, and thus extend the service life of the piston. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of a cast-integral vulcanized open (U-groove) piston in the prior art;
[0013] Figure 2 is a schematic structural diagram of a split-assembled piston in the prior art;
[0014] Figure 3 is a schematic diagram of an integral vulcanized flat-end outer chamfer design piston in the prior art;
[0015] Figure 4 is a front structural schematic diagram of the piston of the present utility model;
[0016] Figure 5 is Figure 4 a schematic cross-sectional structure diagram at A-A in
[0017] Figure 6 is Figure 5 a partial enlarged schematic diagram at B in
[0018] Figure 7 is Figure 5 a schematic diagram of the angular value after partial enlargement at B in
[0019] Figure 8 is a main structural schematic diagram of the present utility model.
[0020] In the figure: 1, piston body; 2, vulcanized layer; 3, conical hole; 4, R corner; 5, plane; 6, first inclined plane; 7, second inclined plane. Detailed implementation manners
[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
[0022] Please refer to Figures 4 - 7 , an embodiment provided by the present utility model: a high-pressure reinforced piston, including a piston body 1, a vulcanized layer 2 is provided on the piston body 1; a tapered hole 3 with a tapered cross-section is provided on the vulcanized layer 2, and the apex of the tapered hole 3 extends towards the piston 1; the number of the tapered holes 3 is multiple, and the multiple tapered holes 3 are circumferentially arranged on the vulcanized layer 2.
[0023] In summary, the ribs between the multiple tapered holes are used to make the entire sealing interface form a multi-stage support structure, effectively preventing the problem that the original fully open piston bulges outwards due to high pressure and finally penetrates; and each tapered hole can expand outwards to different degrees with the magnitude of the fluid pressure. This expansion not only compensates for the wear of the polyurethane sealing surface itself, but also enhances the sealing performance; based on this, adding multiple tapered holes with a conical cross-section on the surface of the vulcanized layer can improve the sealing, lubrication, and wear resistance of the piston, play a reinforcing role when working under high pressure and high temperature, and thus extend the service life of the piston.
[0024] Specifically, the tapered hole 3 includes a first inclined surface 6 that inclines radially outwards along the piston body 1 and a second inclined surface 7 that inclines radially inwards along the piston body 1, and a flat surface 5 is provided between the first inclined surface 6 and the second inclined surface 7.
[0025] Furthermore, an included angle a is formed between the first inclined surface 6 and the second inclined surface 7, and the included angle a is an acute angle. Since the included angle a between the two inclined surfaces is an acute angle, the performance of layer-by-layer sealing of the vulcanized layer 2 after being stressed can be improved, that is, when the vulcanized layer 2 is stressed, the vulcanized layer 2 can gradually contract as it moves downwards, thereby completing the performance of layer-by-layer sealing.
[0026] In practical applications, the angular value of the included angle a is 30°. Therefore, at this angular value, the step-by-step sealing performance of the vulcanized layer 2 is optimal.
[0027] In addition, in order to improve the structural strength of the vulcanized layer 2 and avoid the problem that the sealing performance decreases due to the easy deformation of the bottom surface area of the tapered hole 3 being small after the vulcanized layer 2 is pressed, R corners 4 are provided between one end of the plane 5 and the first inclined surface 6 and between the other end of the plane 5 and the second inclined surface 7. Specifically, the angular value of the R corner 4 is b; wherein, 60° ≤ b ≤ 80°.
[0028] In summary, the setting of the plane 5 can enhance the bearing capacity of the bottom surface of the vulcanized layer 2 and reduce the problem that the vulcanized layer 2 is prone to deformation after being stressed. Further, due to the setting of the R corner 4, on the one hand, it makes the processing of the tapered hole 3 convenient, and on the other hand, it can utilize the R corner to further improve the anti-deformation ability of the bottom surface of the tapered hole 3.
[0029] At the same time, since the angular value b of the R corner 4 is 75°, the compressive resistance of the bottom surface of the vulcanized layer 2 can reach the optimum at this angle.
[0030] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.
Claims
1. A high-pressure reinforced piston, characterized in that: It includes a piston body (1), and a vulcanized layer (2) is provided on the piston body (1); A tapered hole (3) with a tapered cross-section is provided on the vulcanized layer (2), and the apex of the tapered hole (3) extends towards the piston body (1); The number of the tapered holes (3) is multiple, and the multiple tapered holes (3) are circumferentially arrayed on the vulcanized layer (2).
2. The high-pressure reinforced piston according to claim 1, wherein: The tapered hole (3) includes a first inclined surface (6) inclined radially outward along the piston body (1) and a second inclined surface (7) inclined radially inward along the piston body (1), and a flat surface (5) is provided between the first inclined surface (6) and the second inclined surface (7).
3. A high-pressure reinforcement piston according to claim 2, characterized in that: An included angle a is formed between the first inclined surface (6) and the second inclined surface (7), and the included angle a is an acute angle.
4. The high-pressure reinforcing piston according to claim 3, characterized in that: The angle value of the included angle a is 30°.
5. A high-pressure reinforced piston according to claim 2, characterized in that: An R angle (4) is provided between one end of the flat surface (5) and the first inclined surface (6) and between the other end of the flat surface (5) and the second inclined surface (7).
6. The high-pressure reinforcement piston according to claim 5, wherein: The angle value of the R angle (4) is b; wherein, 60° ≤ b ≤ 80°.
7. A high-pressure reinforcing piston according to claim 6, characterized in that: The angle value b of the R angle (4) is 75°.