Wear-resistant assembly of damping type plunger pump

Abstract

The utility model discloses a wear-resistant component of a shock-absorbing plunger pump, which comprises a shock-absorbing wear-resistant block made of high-wear-resistant hydrogenated nitrile rubber, and a first matching surface is arranged on the upper wall of the shock-absorbing wear-resistant block. By adopting the composite structure of the hydrogenated butadiene-acrylonitrile rubber and the three-dimensional net-shaped alloy framework, the fatigue resistance and the impact resistance of the rubber matrix are remarkably improved, the problem that a traditional rubber material is prone to cracking under high-frequency impact is fundamentally solved, the overall service life of the valve assembly is prolonged, and the service life of the valve assembly is prolonged. By optimizing a matching surface structure and introducing a multi-stage buffer mechanism, concentrated impact force generated when the valve seat is closed is effectively dispersed, the problems of breakage of the connecting rod and permanent deformation of the rubber block caused by stress concentration are avoided, and the operation stability of the valve assembly under the high-frequency working condition is improved.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, and in particular to a wear-resistant component of a shock-absorbing plunger pump. Background Technology

[0002] In the existing technology, plunger pump valve assemblies have many defects and shortcomings. During equipment operation, the valve assembly frequently opens and closes, resulting in large vibrations and rapid wear, leading to frequent valve assembly failures during production. Specifically, these failures manifest in the following ways: 1. The contact area between the valve core and the valve seat needs to be impact-resistant and wear-resistant; 2. Cracks in the steel frame support of the upper rubber block of the valve core and breakage of the upper and lower connecting rods in the middle of the rubber block render the valve core unusable, with most cracking occurring within 30 days of use.

[0003] To address this, a disclosed technology proposes a shock-absorbing wear-resistant block, a plunger pump valve assembly, and a plunger pump. The shock-absorbing block includes a main body with an axially formed mounting hole. A mating surface is configured near the outer periphery of the main body, consisting of a first mating surface formed on the upper part of the main body and a second mating surface formed on the lower part. The main body is made of rubber. This disclosed technology improves the mating structure between the shock-absorbing wear-resistant block and the valve core rubber block support steel frame, changing the original inclined surface to a vertical plane. Based on this plane, the corresponding position of the valve core rubber block support steel frame is further improved. Furthermore, by using wear-resistant rubber instead of the current polyurethane material, the wear resistance and impact resistance of the shock-absorbing wear-resistant block are significantly enhanced.

[0004] However, although the shock-absorbing and wear-resistant blocks proposed in the above-disclosed technologies have been changed from polyurethane to rubber and the mating surface structure has been optimized, there is still a risk of deformation and cracking under high-frequency impact loads, resulting in a short lifespan of the valve core assembly. The fundamental reason is that: the rubber material is prone to fatigue cracking under long-term impact; although the thickness gradient design can disperse some stress, the impact force is concentrated when it collides with the mating inclined surface of the valve seat when closed, and there is a lack of effective buffering mechanism; the internal structure is not reinforced and is prone to permanent deformation under compression.

[0005] Therefore, it is necessary to develop a wear-resistant component for a shock-absorbing plunger pump to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wear-resistant component for a shock-absorbing plunger pump.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a wear-resistant component for a shock-absorbing plunger pump, comprising a shock-absorbing and wear-resistant block, wherein the shock-absorbing and wear-resistant block is made of high wear-resistant hydrogenated nitrile rubber, the upper wall of the shock-absorbing and wear-resistant block is provided with a first mating surface, the lower wall of the shock-absorbing and wear-resistant block is provided with a second mating surface, the shock-absorbing and wear-resistant block is provided with an outer peripheral surface in the circumferential direction, a transition surface is provided between the outer peripheral surface and the second mating surface, the inner wall of the shock-absorbing and wear-resistant block is provided with a vertically penetrating mounting hole, the inside of the shock-absorbing and wear-resistant block is provided with a three-dimensional skeleton for improving the support effect, the outer peripheral wall of the shock-absorbing and wear-resistant block is provided with multiple sets of reinforcing ribs to improve strength, and the lower wall of the second mating surface of the shock-absorbing and wear-resistant block is provided with a buffer pad for further improving the cushioning performance.

[0008] As a further description of the above technical solution:

[0009] The three-dimensional skeleton is a three-dimensional mesh structure that radiates from the mounting holes to the outer peripheral surface. The three-dimensional skeleton and the shock-absorbing and wear-resistant block are integrally vulcanized.

[0010] As a further description of the above technical solution:

[0011] The three-dimensional skeleton is made of high-elasticity alloy steel wire.

[0012] As a further description of the above technical solution:

[0013] The multiple sets of reinforcing ribs are distributed in equal circumferences around the axis of the mounting hole, and the reinforcing ribs are set on the outer peripheral surface and the outer wall of the transition surface.

[0014] As a further description of the above technical solution:

[0015] The lower wall of the second mating surface is provided with a groove, and the buffer pad is provided on the inner side wall of the groove. The depth of the groove is 1 / 3 of the thickness of the buffer pad, and the lower wall of the buffer pad protrudes from the lower wall of the second mating surface with a protrusion height between 1-2 mm.

[0016] As a further description of the above technical solution:

[0017] The buffer pad is a silicone pad, and the Shore A hardness of the silicone pad is -.

[0018] As a further description of the above technical solution:

[0019] The transition surface is arc-shaped, and the radius of curvature R of the transition surface and the radius D of the shock-absorbing and wear-resistant block satisfy: 0.3D≤R≤0.35D, where D is the maximum outer diameter of the shock-absorbing and wear-resistant block.

[0020] This utility model has the following beneficial effects:

[0021] 1. Compared with existing technologies, the wear-resistant components of this shock-absorbing plunger pump significantly improve the fatigue resistance and impact resistance of the rubber matrix by adopting a composite structure of hydrogenated nitrile rubber and a three-dimensional mesh alloy skeleton. This fundamentally solves the problem of traditional rubber materials being prone to cracking under high-frequency impact and extends the overall service life of the valve assembly.

[0022] 2. Compared with existing technologies, the wear-resistant components of this shock-absorbing plunger pump effectively disperse the concentrated impact force when the valve seat closes by optimizing the mating surface structure and introducing a multi-stage buffering mechanism. This avoids the problems of connecting rod breakage and permanent deformation of rubber blocks caused by stress concentration, and improves the operational stability of the valve assembly under high-frequency conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the wear-resistant component of a shock-absorbing plunger pump proposed in this utility model;

[0024] Figure 2 This is a partial cross-sectional view of the connection structure of the shock-absorbing and wear-resistant block and buffer pad of the wear-resistant component of the shock-absorbing plunger pump proposed in this utility model;

[0025] Figure 3 This is a partial cross-sectional view of the shock-absorbing and wear-resistant block of a wear-resistant component for a shock-absorbing plunger pump proposed in this utility model.

[0026] Legend:

[0027] 1. Shock-absorbing and wear-resistant block; 2. Mounting hole; 3. Reinforcing rib; 4. Buffer pad; 5. Three-dimensional frame; 101. First mating surface; 102. Second mating surface; 1021. Sink; 103. Outer peripheral surface; 104. Transition surface. Detailed Implementation

[0028] 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.

[0029] Reference Figures 1 to 3 The present invention provides a wear-resistant component for a shock-absorbing plunger pump: including a shock-absorbing wear-resistant block 1, a first mating surface 101 on the upper wall of the shock-absorbing wear-resistant block 1, a second mating surface 102 on the lower wall of the shock-absorbing wear-resistant block 1, an outer peripheral surface 103 circumferentially provided on the shock-absorbing wear-resistant block 1, a transition surface 104 between the outer peripheral surface 103 and the second mating surface 102, and an installation hole 2 that runs vertically through the inner wall of the shock-absorbing wear-resistant block 1. The shock-absorbing wear-resistant block 1 is made of high wear-resistant hydrogenated nitrile rubber.

[0030] The shock-absorbing and wear-resistant block 1 made of hydrogenated nitrile rubber significantly improves the resistance to mineral particle erosion while maintaining the elasticity of rubber, solving the problem of rapid wear of traditional polyurethane materials in mineral slurry environments.

[0031] In order to achieve internal stress dispersion and crack resistance improvement, the shock-absorbing and wear-resistant block 1 is provided with a three-dimensional skeleton 5 to improve the support effect. The three-dimensional skeleton 5 is a three-dimensional mesh structure that radiates from the mounting hole 2 to the outer peripheral surface 103. The three-dimensional skeleton 5 and the shock-absorbing and wear-resistant block 1 are integrally vulcanized and molded. The three-dimensional skeleton 5 is made of high elasticity alloy steel wire.

[0032] The three-dimensional skeleton 5 extends outward from the mounting hole 2, covering the entire internal volume of the shock-absorbing and wear-resistant block 1 (but not exposed on the surface) to provide uniform internal support; the three-dimensional skeleton 5 and the shock-absorbing and wear-resistant block 1 are integrally formed by vulcanization process to enhance the overall tensile strength and fatigue resistance, and prevent permanent deformation and cracking of the shock-absorbing and wear-resistant block 1 caused by compressive load when the valve assembly of the plunger pump is closed.

[0033] To enhance lateral deformation resistance, the shock-absorbing and wear-resistant block 1 is provided with multiple sets of reinforcing ribs 3 to improve strength on the outer circumferential wall. The multiple sets of reinforcing ribs 3 are evenly distributed in a circle with the mounting hole 2 as the center. The reinforcing ribs 3 are provided on the outer circumferential surface 103 and the outer wall of the transition surface 104.

[0034] The reinforcing rib 3 suppresses the radial torsion of the rubber matrix during the high-frequency reciprocating motion of the valve core, ensuring that the first mating surface 101 and the valve core rubber block support steel frame always remain in a planar fit, while providing additional lateral support to prevent the shock-absorbing and wear-resistant block 1 from bulging and deforming under the pressure of the valve seat when the valve assembly of the plunger pump is closed.

[0035] To optimize the closed-loop buffering performance, a buffer pad 4 is provided on the lower wall of the second mating surface 102 of the shock-absorbing and wear-resistant block 1 to further improve the buffering performance. A groove 1021 is provided on the lower wall of the second mating surface 102. The buffer pad 4 is located on the inner side wall of the groove 1021. The depth of the groove 1021 is 1 / 3 of the thickness of the buffer pad 4. The lower wall of the buffer pad 4 protrudes from the lower wall of the second mating surface 102 and the protrusion height is 2mm. The buffer pad 4 is a silicone pad with a Shore A hardness of 45.

[0036] The buffer pad 4 and the shock-absorbing and wear-resistant block 1 form a "soft-hard" gradient structure. When the valve assembly of the plunger pump is closed, the buffer pad 4 first contacts the mating inclined surface of the valve seat to absorb the initial impact energy and reduce the peak collision force. Subsequently, the shock-absorbing and wear-resistant block 1 acts as the main body to bear the main load, realizing progressive buffering.

[0037] In order to disperse the impact load on the second mating surface 102, the transition surface 104 is arc-shaped, and the radius of curvature R of the transition surface 104 and the radius D of the shock-absorbing and wear-resistant block 1 satisfy: 0.3D=R, where D is the maximum outer diameter of the shock-absorbing and wear-resistant block 1;

[0038] The arc transition structure of the transition surface 104 disperses the impact load of the second mating surface 102 along the curved surface gradient, avoiding the stress abrupt change caused by the planar transition. The curved surface structure allows the hydrogenated nitrile rubber matrix to produce multi-directional elastic deformation under pressure, which greatly reduces local strain compared to the planar transition. This design allows the stress to be smoothly transferred from the high impact area (edge) to the low stress area (center) when closed, avoiding cracking caused by local stress concentration.

[0039] Working Principle: The shock-absorbing and wear-resistant block 1 is made of high-wear-resistant hydrogenated nitrile rubber. While maintaining rubber elasticity, the hydrogenated nitrile rubber material significantly improves the resistance to mineral particle erosion, solving the problem of rapid wear of traditional polyurethane materials in mineral slurry environments. The three-dimensional skeleton 5 extends radially outward from the mounting hole 2, covering the entire internal volume of the shock-absorbing and wear-resistant block 1 (but not exposed on the surface) to provide uniform internal support. The three-dimensional skeleton 5 and the shock-absorbing and wear-resistant block 1 are integrally molded through a vulcanization process, enhancing overall tensile strength and fatigue resistance, preventing permanent deformation and cracking caused by compressive loads when the valve assembly of the plunger pump is closed. The reinforcing rib 3 suppresses radial torsion of the rubber matrix during the high-frequency reciprocating motion of the valve core, ensuring that the first mating surface 101 and the valve core rubber block support steel frame always maintain a planar fit, while providing... Additional lateral support prevents the shock-absorbing and wear-resistant block 1 from bulging and deforming under the pressure of the valve seat when the valve assembly of the plunger pump is closed; the buffer pad 4 and the shock-absorbing and wear-resistant block 1 form a "soft-hard" gradient structure; when the valve assembly of the plunger pump is closed, the buffer pad 4 first contacts the mating inclined surface of the valve seat to absorb the initial impact energy and reduce the peak impact force; then the shock-absorbing and wear-resistant block 1 acts as the main body to bear the main load, realizing progressive buffering; the arc transition structure of the transition surface 104 disperses the impact load of the second mating surface 102 along the curved surface gradient, avoiding stress abrupt changes caused by planar transition; the curved surface structure allows the hydrogenated nitrile rubber matrix to produce multi-directional elastic deformation under pressure, which greatly reduces local strain compared to planar transition. This design allows stress to be smoothly transferred from the high impact area (edge) to the low stress area (center) when closed, avoiding cracking caused by local stress concentration.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant component for a shock-absorbing plunger pump, characterized in that: The device includes a shock-absorbing and wear-resistant block (1), which is made of high wear-resistant hydrogenated nitrile rubber. The upper wall of the shock-absorbing and wear-resistant block (1) is provided with a first mating surface (101), the lower wall of the shock-absorbing and wear-resistant block (1) is provided with a second mating surface (102), the outer peripheral surface (103) is provided in the circumferential direction of the shock-absorbing and wear-resistant block (1), and a transition surface (104) is provided between the outer peripheral surface (103) and the second mating surface (102). The inner wall of the shock-absorbing and wear-resistant block (1) is provided with a vertically penetrating mounting hole (2). The inside of the shock-absorbing and wear-resistant block (1) is provided with a three-dimensional skeleton (5) for improving the support effect. The outer peripheral wall of the shock-absorbing and wear-resistant block (1) is provided with multiple sets of reinforcing ribs (3) to improve strength. The lower wall of the second mating surface (102) of the shock-absorbing and wear-resistant block (1) is provided with a buffer pad (4) for further improving the cushioning performance.

2. The wear-resistant component of a shock-absorbing plunger pump according to claim 1, characterized in that: The three-dimensional skeleton (5) is a three-dimensional mesh structure that radiates from the mounting hole (2) to the outer peripheral surface (103). The three-dimensional skeleton (5) and the shock-absorbing and wear-resistant block (1) are integrally vulcanized.

3. The wear-resistant component of a shock-absorbing plunger pump according to claim 2, characterized in that: The three-dimensional skeleton (5) is made of high-elasticity alloy steel wire.

4. The wear-resistant component of a shock-absorbing plunger pump according to claim 3, characterized in that: The multiple sets of reinforcing ribs (3) are distributed in a circular pattern with the mounting hole (2) as the center. The reinforcing ribs (3) are set on the outer wall of the outer peripheral surface (103) and the transition surface (104).

5. The wear-resistant component of a shock-absorbing plunger pump according to claim 4, characterized in that: The lower wall of the second mating surface (102) is provided with a groove (1021), and the buffer pad (4) is provided on the inner side wall of the groove (1021). The depth of the groove (1021) is 1 / 3 of the thickness of the buffer pad (4). The lower wall of the buffer pad (4) protrudes from the lower wall of the second mating surface (102) and the protrusion height is between 1-2 mm.

6. The wear-resistant component of a shock-absorbing plunger pump according to claim 5, characterized in that: The buffer pad (4) is a silicone pad with a Shore A hardness of 40-50.

7. The wear-resistant component of a shock-absorbing plunger pump according to claim 6, characterized in that: The transition surface (104) is arc-shaped, and the radius of curvature R of the transition surface (104) and the radius D of the shock-absorbing and wear-resistant block (1) satisfy: 0.3D≤R≤0.35D, where D is the maximum outer diameter of the shock-absorbing and wear-resistant block (1).

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