Nine-hole disc for wear-resistant plunger pump

Abstract

The nine-hole disc comprises a nine-hole disc body, a mounting hole is formed in the center of the nine-hole disc body, a plurality of sets of plunger hole assemblies are annularly formed in the side of the nine-hole disc body, a plurality of sets of arc-shaped oil guide grooves are formed in the surface of the nine-hole disc body in the circumferential direction, and the plunger hole assemblies are arranged in the arc-shaped oil guide grooves in the circumferential direction. The interiors of the arc-shaped oil guide grooves communicate with radial oil channels in the radial direction, and a weight reduction mechanism is arranged on the back face of the nine-hole disc body. The nine-hole disc main body is of a double-layer composite structure, the overall strength of the nine-hole disc main body can be improved, uniform coverage of an oil film can be conveniently promoted and boundary friction can be reduced through the arc-shaped oil guide grooves communicated among the multiple sets of plunger hole assemblies, oil can be guided into the arc-shaped oil guide grooves through the radial oil channels, and the service life of the nine-hole disc main body is prolonged. Meanwhile, through the design of the hole wall and the hole edge of the plunger, stress can be dispersed, crack propagation is avoided, the inertia moment can be reduced through the groove ring and the lightening hole, and the plunger is suitable for the high-speed working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to plunger pump technical field especially relates to a nine hole disc for wear -resisting plunger pump. BACKGROUND

[0002] Plunger pump return disc (also called return disc or swash plate) is the key component in swash plate type axial plunger pump, its function is through the inclination angle of swash plate changes the reciprocating motion stroke of plunger, thereby adjusting the displacement and flow of pump, the return disc (swash plate) of plunger pump is the core component of driving plunger reciprocating motion, and the traditional return disc is mostly single layer steel structure, and the plunger hole is uniformly circumferentially distributed.

[0003] But the nine hole disc in use currently, plunger shoe and return disc contact surface are plane sliding friction, and under high pressure working condition, it is easy to wear, leads to leakage and efficiency drop, and traditional hole site design is insufficient for oil film distribution optimization, and uneven lubrication aggravates local wear, and the hole edge is prone to stress concentration after long-term use, leading to fatigue crack, for this purpose, we propose a nine hole disc for wear -resisting plunger pump to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a nine hole disc for wear -resisting plunger pump that solves the problems existing in the prior art.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A nine hole disc for wear -resisting plunger pump, including nine hole disc main part, the central part of nine hole disc main part is provided with mounting hole, the side of nine hole disc main part is annular and is provided with multiple plunger hole assemblies, the surface of nine hole disc main part is circumferentially provided with multiple arc oil guide grooves, and multiple arc oil guide grooves are internally and radially communicated with radial oil channels, and the back of nine hole disc main part is provided with a weight reduction mechanism.

[0007] Preferably, the nine hole disc main part is composed of a double-layer composite structure, the base layer of the nine hole disc main part is high-strength alloy steel, and the surface layer of the nine hole disc main part is a plasma-sprayed tungsten carbide wear-resistant layer.

[0008] Preferably, the plunger hole assembly includes a plunger hole wall, the cross section of the plunger hole wall is configured as a circular truncated cone, a chamfer is provided at the inlet of the plunger hole wall, and a hole edge is provided at the outlet of the plunger hole wall.

[0009] Preferably, the arc-shaped oil guide groove is provided with three groups between the multiple plunger hole assemblies, and the edge of the arc-shaped oil guide groove and the radial oil channel is arc-shaped.

[0010] Preferably, the weight reduction mechanism includes a groove ring, the back of the nine hole disc main part is provided with a groove ring and equidistant grooves, and the outside of the groove ring is communicated with multiple equidistant grooves.

[0011] Preferably, the groove ring is opened as a circular ring, and the number of groups of equidistant grooves is the same as the number of plunger hole assemblies.

[0012] Preferably, the inner wall of the groove ring is equidistantly provided with a plurality of groups of lightening holes, and the depth of the lightening hole is three quarters of the nine-hole disc body.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The device is a double-layer composite structure through the nine-hole disc body, which can increase the overall strength, and through the arc-shaped oil guide grooves communicated between the groups of plunger hole assemblies, the oil film can be conveniently and uniformly covered, the boundary friction is reduced, and through the radial oil channels, the oil can be guided into the arc-shaped oil guide grooves, at the same time, through the design of the plunger hole wall and the hole edge, the stress can be dispersed, crack propagation is avoided, and through the groove ring and the lightening hole, the inertia moment can be reduced, and the device is suitable for high-speed working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of a nine-hole disc for a wear-resistant plunger pump according to the utility model;

[0016] Figure 2 It is a three-dimensional bottom view schematic view of a nine-hole disc for a wear-resistant plunger pump according to the utility model;

[0017] Figure 3 It is a three-dimensional sectional view schematic view of the plunger hole wall and hole edge structure in the nine-hole disc for a wear-resistant plunger pump according to the utility model. Figure 1 In the figure: 1, nine-hole disc body; 2, mounting hole;

[0018] 3, plunger hole assembly; 31, plunger hole wall; 32, hole edge;

[0019] 4, arc-shaped oil guide groove; 5, radial oil channel; 6, groove ring; 7, equidistant groove; 8, lightening hole.

[0020] DETAILED DESCRIPTION The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0021] Refer to

[0022] Figures 1-3 ​The utility model provides a kind of nine-hole disc for wear-resistant plunger pump, including nine-hole disc main body 1, the central part of nine-hole disc main body 1 is provided with mounting hole 2, the side of nine-hole disc main body 1 is annularly provided with multiple plunger hole assemblies 3, and the surface of nine-hole disc main body 1 is circumferentially provided with multiple arc oil guide grooves 4, and multiple arc oil guide grooves 4 are radially communicated with radial oil channel 5 inside, through radial oil channel 5 and multiple arc oil guide grooves 4, the effect of lubricating oil can be conveniently guided, and nine-hole disc main body 1 back is provided with weight reduction mechanism.

[0023] Further, referring to Figure 1 And Figure 2 It can be known that nine-hole disc main body 1 is composed of double-layer composite structure, the base layer of nine-hole disc main body 1 is high-strength alloy steel, and the surface layer of nine-hole disc main body 1 is plasma sprayed tungsten carbide wear-resistant layer, by the double-layer composite structure of nine-hole disc main body 1, the strength of nine-hole disc main body 1 can be improved, and the service life of nine-hole disc main body 1 is increased.

[0024] Further, referring to Figure 2 And Figure 3 It can be known that plunger hole assembly 3 includes plunger hole wall 31, the cross section of plunger hole wall 31 is provided as a circular truncated cone, the entrance of plunger hole wall 31 is provided with a chamfer, and the outlet of plunger hole wall 31 is provided with hole edge 32, by the cross section of plunger hole wall 31 being provided as a circular truncated cone and hole edge 32, stress can be conveniently dispersed, crack propagation is avoided, and by the chamfer provided at the entrance of plunger hole wall 31, plug-in wear can be reduced.

[0025] Further, referring to Figure 3 It can be known that three groups of arc oil guide grooves 4 are provided between multiple plunger hole assemblies 3, and the edge of arc oil guide groove 4 and radial oil channel 5 is arc-shaped, by three groups of arc oil guide grooves 4 being provided between multiple plunger hole assemblies 3, the effect of lubricating oil guided by radial oil channel 5 and multiple arc oil guide grooves 4 can be achieved, oil film uniform coverage is promoted, and boundary friction is reduced.

[0026] Further, referring to Figure 2 And Figure 3 It can be known that the weight reduction mechanism includes groove ring 6, and the back of nine-hole disc main body 1 is provided with groove ring 6 and equidistant grooves 7, the outside of groove ring 6 is communicated with multiple equidistant grooves 7, by groove ring 6 and equidistant grooves 7, the overall counterweight of nine-hole disc main body 1 can be conveniently reduced, inertia moment is reduced, and it is suitable for high-speed working conditions.

[0027] Further, referring to Figure 2 And Figure 3 It can be known that groove ring 6 is provided as a circular ring, and the number of multiple equidistant grooves 7 is same as the number of plunger hole assemblies 3, by multiple groups of equidistant grooves 7, the weight of nine-hole disc main body 1 can be conveniently maximized to reduce.

[0028] Further, with reference to Figure 2 And Figure 3 Figure 2 Figure 3 It can be known that the inner wall of the groove ring 6 is equidistantly provided with a plurality of groups of weight reduction holes 8, and the depth of the weight reduction holes 8 is three quarters of the nine-hole disc body 1, and the plurality of groups of weight reduction holes 8 can further reduce the weight of the nine-hole disc body 1;

[0029] The above is the whole working principle of the utility model.

[0030] In the utility model, the mounting mode, the connection mode or the setting mode of all the components described above are common mechanical modes, and the specific structure, model and coefficient index of all the components are self-contained technologies, as long as the beneficial effects can be achieved, implementation can be carried out, so no more is added.

[0031] The above embodiment is the preferred embodiment of the utility model, but the embodiment of the utility model is not limited by the above embodiment, and any change, modification, substitution, combination, simplification made without departing from the spirit and principle of the utility model should be equivalent replacement, which is included in the protection scope of the utility model.

[0032] In the utility model, under the condition of no opposite statement, the orientation words contained in the terms such as up and down, left and right, front and back, inside and outside and vertical and horizontal only represent the orientation of the term in the conventional use state, or the common name understood by the person skilled in the art, and should not be regarded as the limitation of the term, at the same time, the ordinal terms such as first, second and third do not represent the specific quantity and order, but are only used for the differentiation of the name, and moreover, the term 'including', 'containing' or any other variant is intended to cover non-exclusive containing, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

Claims

1. A nine-hole disc for a wear-resistant plunger pump, comprising a nine-hole disc body (1), characterized in that, The nine-hole disc body (1) has an installation hole (2) in the center. The nine-hole disc body (1) has multiple sets of plunger hole assemblies (3) in a ring shape on its side. The nine-hole disc body (1) has multiple sets of arc-shaped oil guide grooves (4) in the circumferential direction on its surface. The multiple sets of arc-shaped oil guide grooves (4) are radially connected to radial oil passages (5). The nine-hole disc body (1) has a weight reduction mechanism on its back.

2. The nine-hole disc for a wear-resistant plunger pump according to claim 1, characterized in that, The nine-hole disk body (1) is composed of a double-layer composite structure. The base layer of the nine-hole disk body (1) is high-strength alloy steel, and the surface layer of the nine-hole disk body (1) is a plasma-sprayed tungsten carbide wear-resistant layer.

3. The nine-hole disc for a wear-resistant plunger pump according to claim 1, characterized in that, The plunger hole assembly (3) includes a plunger hole wall (31), the cross-section of which is frustum-shaped, a chamfer is provided at the entrance of the plunger hole wall (31), and a hole edge (32) is provided at the exit of the plunger hole wall (31).

4. The nine-hole disc for a wear-resistant plunger pump according to claim 1, characterized in that, The arc-shaped oil guide groove (4) is provided in three sets between multiple sets of plunger hole assemblies (3), and the corners of the arc-shaped oil guide groove (4) and the radial oil passage (5) are arc-shaped.

5. The nine-hole disc for a wear-resistant plunger pump according to claim 1, characterized in that, The weight reduction mechanism includes a grooved ring (6), and the back of the nine-hole disc body (1) is provided with a grooved ring (6) and equidistant grooves (7). The outer side of the grooved ring (6) is connected to multiple sets of equidistant grooves (7).

6. The nine-hole disc for a wear-resistant plunger pump according to claim 5, characterized in that, The groove ring (6) is circular, and the number of multiple sets of equidistant grooves (7) is the same as the number of plunger hole assemblies (3).

7. A nine-hole disc for a wear-resistant plunger pump according to claim 5, characterized in that, The inner wall of the groove ring (6) is provided with multiple sets of weight-reducing holes (8) at equal intervals, and the depth of the weight-reducing holes (8) is three-quarters of the body of the nine-hole plate (1).

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