High-adjustability plunger pump

Abstract

The utility model provides a high-adjustability plunger pump, and belongs to the technical field of water pumps. The problem that in the prior art, the adjusting performance in a plunger pump is insufficient is solved. The pump comprises a pump body and a pump cover, the pump cover is fixedly installed on one side of the pump body, a pump shaft, a plunger assembly, a swash plate and an adjusting assembly are fixedly installed in the pump body, the pump shaft penetrates through the swash plate and the plunger assembly and is connected with the pump cover, a connecting hole is formed in the upper end of the pump cover, and an adjusting protruding pipe is integrally formed on the outer side of the pump cover. The adjusting assembly comprises a positioning sleeve, an adjusting sleeve, an adjusting shaft, a spring cap and a spring, the positioning sleeve is fixedly connected with the connecting hole, the adjusting shaft is installed in the positioning sleeve and stretches into the connecting hole and stretches into the adjusting protruding pipe, a fixing bolt is installed in the adjusting protruding pipe and connected with the adjusting shaft, and the adjusting sleeve is arranged on the outer sides of the positioning sleeve and the adjusting shaft in a sleeving mode. The plunger assembly is connected with one side of the swash plate, a circular groove is formed in the upper end of the other side of the swash plate, one end of the spring cap is connected with the circular groove, and the spring is connected with the inner wall of the pump body and the spring cap. The device has the advantage of being good in adjusting performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a highly adjustable plunger pump. Background Art

[0002] A plunger pump is an important device in a hydraulic system. It relies on the reciprocating movement of a plunger in a cylinder block to change the volume of a sealed working chamber to achieve oil suction and oil pressure.

[0003] Chinese Patent No. CN209067851U discloses a plunger pump, which includes a pump body provided with a water flow channel and a water outlet arranged at one end of the pump body. The water outlet is communicated with the water flow channel. A liquid suction nozzle is arranged in the water flow channel. An exhaust and liquid suction assembly communicated with the liquid suction nozzle is arranged outside the side wall of the pump body. The exhaust and liquid suction assembly includes a mounting part and a functional part detachably connected to the mounting part. A through hole communicated with the nozzle channel is arranged on the side wall of the pump body. The mounting part is communicated with the through hole. The functional part includes a joint detachably connected to the mounting part and internally provided with an exhaust and liquid suction channel, and a spherical ball and a spring sequentially arranged in the exhaust and liquid suction channel. Two steps are arranged in the exhaust and liquid suction channel to divide the exhaust and liquid suction channel into three parts. The two steps are the first step and the second step respectively. One end of the spring abuts against the first step, the other end of the spring abuts against one end of the spherical ball, and a second sealing ring is arranged on the second step.

[0004] The plunger pump provided by this patent lacks an adjustment device inside, and it is difficult to adjust the flow rate of the liquid inside the pump body during use. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a highly adjustable plunger pump for the above problems existing in the prior art.

[0006] The purpose of the present utility model can be achieved by the following technical solutions: A highly adjustable plunger pump includes a pump body and a pump cover. The pump cover is fixedly installed on one side of the pump body. A pump shaft, a plunger assembly, a swash plate, and an adjustment assembly are fixedly installed inside the pump body. The pump shaft passes through the swash plate and the plunger assembly and is connected to the pump cover. A connection hole is opened at the upper end of the pump cover, and an adjustment convex tube is integrally formed on the outside of the pump cover. The adjustment assembly includes a positioning sleeve, an adjustment sleeve, an adjustment shaft, a spring cap, and a spring. The positioning sleeve is fixedly connected to the connection hole. The adjustment shaft is installed inside the positioning sleeve, extends into the connection hole and into the adjustment convex tube. A fixing bolt is installed in the adjustment convex tube and is connected to the adjustment shaft. The adjustment sleeve is sleeved outside the positioning sleeve and the adjustment shaft. The plunger assembly is connected to one side of the swash plate. A circular groove is opened at the upper end of the other side of the swash plate. One end of the spring cap is connected to the circular groove. The spring is respectively connected to the inner wall of the pump body and the spring cap.

[0007] In the above-mentioned highly adjustable plunger pump, a pressure-holding cylinder is fixed to the upper end of the pump cover, and a pressure-holding chamber is formed inside the pressure-holding cylinder.

[0008] In the above-mentioned highly adjustable plunger pump, a small spring cap, a small spring, and a sliding shaft are fixedly installed in the pressure-holding chamber. The sliding shaft is connected to the small spring cap. A sealing bolt is fixedly installed on one side of the pressure-holding chamber. The small spring is respectively connected to the small spring cap and the sealing bolt.

[0009] In the above-mentioned highly adjustable plunger pump, first shaft holes are provided on both sides of the swash plate, second shaft holes are provided on both sides of the pump body, a small shaft is fixedly connected in the first shaft hole and the second shaft hole, and a side end cover is fixed on one side of the small shaft. The side end cover seals and fixes the outside of the second shaft hole.

[0010] In the above-mentioned highly adjustable plunger pump, a distribution disk is fixedly installed on one side of the plunger assembly. The distribution disk is sleeved on the pump shaft and connected to the inner wall of the pump body.

[0011] Compared with the prior art, a highly adjustable plunger pump provided by the present utility model has the following beneficial effects: 1. By installing an adjustment assembly inside the pump body, the adjustment shaft and the positioning sleeve extend into the connection hole, the adjustment shaft extends into the adjustment convex tube, the spring cap is connected to the circular groove on the swash plate, the spring is respectively connected to the spring cap and the inside of the pump body, and the adjustment assembly can control the output flow and pressure inside the pump body. By precisely controlling the fluid flow, the stability of the production process and the product quality can be improved; 2. By providing a pressure-holding cylinder on the pump cover and arranging a small spring, a small spring cap, and a sliding shaft inside the pressure-holding cylinder, the pressure stability of the present utility model is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is an exploded schematic diagram of the present utility model;

[0014] Figure 3 is a schematic diagram of the overall sectional structure of the present utility model;

[0015] Figure 4 is a schematic diagram of the sectional structure of the pump cover.

[0016] In the figure: 1. Pump body; 11. Second shaft hole; 2. Pump cover; 21. Connecting hole; 22. Adjusting convex tube; 221. Fixing bolt; 23. Pressure-holding cylinder; 231. Pressure-holding cavity; 24. Small spring cap; 25. Small spring; 26. Slide shaft; 27. Sealing bolt; 3. Pump shaft; 4. Plunger assembly; 5. Swash plate; 51. Circular groove; 52. First shaft hole; 6. Adjusting assembly; 61. Positioning sleeve; 62. Adjusting sleeve; 63. Adjusting shaft; 64. Spring cap; 65. Spring; 7. Small shaft; 8. Side end cover; 9. Oil distribution plate. Detailed implementation mode

[0017] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0018] As Figures 1 to 4 shown, this embodiment includes a pump body 1 and a pump cover 2. A pump shaft 3, a plunger assembly 4, a swash plate 5, and an adjusting assembly 6 are respectively fixedly installed inside the pump body 1. The pump cover 2 is fixedly installed on one side of the pump body 1. The pump shaft 3 horizontally penetrates through the swash plate 5 and the plunger assembly 4 respectively and is connected to the pump cover 2. The adjusting assembly 6 includes a positioning sleeve 61, an adjusting sleeve 62, an adjusting shaft 63, a spring cap 64, and a spring 65. The adjusting sleeve 62 is sleeved on the outside of the positioning sleeve 61. The adjusting shaft 63 is installed inside the positioning sleeve 61. A connecting hole 21 is provided inside the upper end of the pump cover 2, and an adjusting convex tube 22 is integrally formed on the outside of the pump cover 2. The positioning sleeve 61 extends into the connecting hole 21 and is connected to the connecting hole 21. The adjusting shaft 63 extends into the connecting hole 21 and continues to extend into the adjusting convex tube 22. A fixing bolt 221 is fixed on the outside of the adjusting convex tube 22, and the fixing bolt 221 extends into the adjusting convex tube 22 and is connected to the adjusting shaft 63. The fixing bolt 221 firmly fixes the adjusting shaft 63. The plunger assembly 4 is connected to one side of the swash plate 5. A circular groove 51 is provided at the upper end of the other side of the swash plate 5. One end of the spring cap 64 is a sphere adapted to the circular groove 51. The sphere at one end of the spring cap 64 extends into the circular groove 51 and is connected to the circular groove 51. The spring 65 is installed on the spring cap 64, and the other end of the spring 65 is connected to the inner wall of the pump body 1.

[0019] As Figures 1 to 4As shown in the figure, a pressure-holding cylinder 23 is fixed to the upper end of the pump cover 2. A through pressure-holding cavity 231 is provided inside the pressure-holding cylinder 23. A small spring cap 24, a small spring 25 and a sliding shaft 26 are fixedly installed in the pressure-holding cavity 231. The sliding shaft 26 is connected to the small spring cap 24. A sealing bolt 27 is fixedly installed on one side of the pressure-holding cavity 231 close to the small spring 25. One end of the sealing bolt 27 extends into the interior of the pressure-holding cavity 231 and the other end extends out of the pressure-holding cavity 231. The small spring 25 is installed on the small spring cap 24 and connected to the sealing bolt 27. The pressure-holding cylinder 23 and the internal small spring cap 24, small spring 25 and sliding shaft 26 form a pressure-holding device, which can play a role in keeping the system pressure stable inside the pump body 1 of this embodiment.

[0020] For further details, as Figures 1 to 4 shown in the figure, first shaft holes 52 are provided on both sides of the swash plate 5, and second shaft holes 11 are provided on both sides of the pump body 1. The small shafts 7 respectively pass through the first shaft holes 52 and the second shaft holes 11. One end of the small shaft 7 is fixedly connected to the swash plate 5 through the first shaft hole 52, and the other end of the small shaft 7 extends out of the second shaft hole 11 and a side end cover 8 is fixed. The side end cover 8 seals and fixes the outside of the second shaft hole 11.

[0021] For further details, as Figure 3 shown in the figure, the oil distribution plate 9 is sleeved and fixed on the pump shaft 3. The oil distribution plate 9 is located on the side of the plunger assembly 4 close to the pump cover 2. One side of the oil distribution plate 9 is connected to the plunger assembly 4 and the other side is connected to the inner side surface of the pump cover 2.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0023] Although various terms are used more in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A highly adjustable plunger pump, comprising a pump body (1) and a pump cover (2), wherein the pump cover (2) is fixedly mounted on one side of the pump body (1), characterized in that: A pump shaft (3), a plunger assembly (4), a swash plate (5) and an adjustment assembly (6) are fixedly installed inside the pump body (1); the pump shaft (3) passes through the swash plate (5) and the plunger assembly (4) and is connected to the pump cover (2); a connecting hole (21) is provided at the upper end of the pump cover (2) and an adjustment convex tube (22) is integrally formed on the outer side of the pump cover (2); the adjustment assembly (6) comprises a positioning sleeve (61), an adjustment sleeve (62), an adjustment shaft (63), a spring cap (64) and a spring (65); the positioning sleeve (61) is fixedly connected to the connecting hole (21); the adjustment shaft (63) is installed on the positioning sleeve (61) and extends into the connecting hole (21) and into the adjusting convex tube (22); a fixing bolt (221) is installed in the adjusting convex tube (22) and the fixing bolt (221) is connected to the adjusting shaft (63); the adjusting sleeve (62) is sleeved on the outside of the positioning sleeve (61) and the adjusting shaft (63); the plunger assembly (4) is connected to one side of the swash plate (5); a circular groove (51) is formed on the upper end of the other side of the swash plate (5); one end of the spring cap (64) is connected to the circular groove (51); and the spring (65) is respectively connected to the inner wall of the pump body (1) and the spring cap (64).

2. A highly adjustable plunger pump according to claim 1, characterized in that: A pressure-maintaining cylinder (23) is fixed to the upper end of the pump cover (2), and a pressure-maintaining cavity (231) is formed inside the pressure-maintaining cylinder (23).

3. A highly adjustable plunger pump according to claim 2, characterized in that: A small spring cap (24), a small spring (25) and a sliding shaft (26) are fixedly installed in the pressure-maintaining chamber (231), the sliding shaft (26) and the small spring cap (24) are connected, a sealing bolt (27) is fixedly installed on one side of the pressure-maintaining chamber (231), and the small spring (25) is respectively connected to the small spring cap (24) and the sealing bolt (27).

4. A highly adjustable plunger pump according to claim 1, characterized in that: The swash plate (5) is provided with first axial holes (52) on both sides, and the pump body (1) is provided with second axial holes (11) on both sides. A small shaft (7) is fixedly connected inside the first axial hole (52) and the second axial hole (11). A side end cover (8) is fixed on one side of the small shaft (7), and the side end cover (8) seals and fixes the outer side of the second axial hole (11).

5. A highly adjustable plunger pump according to claim 1, characterized in that: An oil distribution plate (9) is fixedly mounted on one side of the plunger assembly (4); the oil distribution plate (9) is sleeved on the pump shaft (3) and connected to the inner wall of the pump body (1).

Images