High-precision hydraulic control axial plunger pump

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a high-precision hydraulic control axial plunger pump, which is characterized in that a shell is connected with a cylinder body, cavities are arranged in the shell and the cylinder body, a driving shaft is transversely arranged in the shell, an L-shaped oil outlet channel and an L-shaped oil suction channel are arranged in the cylinder body, and the oil suction channel is arranged in the cylinder body. The oil outlet channel is connected with an oil outlet plunger through an oil distribution disc, the oil suction channel is connected with an oil suction plunger through an oil distribution disc, the oil outlet plunger and the oil suction plunger are respectively connected with a swash plate, the left side of the swash plate is connected with an arc supporting portion, and an auxiliary column is further arranged on the outer ring, directly connected with the swash plate, of the cylinder body. The working pressure and flow stability of the pump body can be improved through the auxiliary column, unstable performance caused by flow fluctuation is reduced, and rotation of the pump body is monitored through the displacement sensor arranged in the elastic movable block; an annular flowmeter is arranged at an output port, a buffer cavity is formed, the stability of the plunger pump body is improved, and the flow of an output point is monitored.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pumps, and more specifically, to a high-precision hydraulic control axial piston pump.

Background Art

[0002] Axial piston pumps are structurally compact, have small radial dimensions and moments of inertia, and high volumetric efficiency. They can operate at high speeds and high pressures, so they are widely used in the hydraulic systems of mechanical equipment that require high pressure, large flow rates, and flow rate regulation. As the most common power components in hydraulic systems, the quality of their performance is crucial for the performance of hydraulic systems.

[0003] Traditional piston pumps usually achieve flow rate changes by changing the angle of the swash plate or the cylinder block. The structure is relatively complex and the control is troublesome. Small-displacement piston pumps usually use a controller to control an electric device arranged on the variable housing to achieve displacement control. However, the displacement control of this structure depends on the preset parameters in the controller. During long-term use, there may be a certain deviation between the actual output displacement and the expected displacement. The control accuracy of the displacement is not high, and the overall volume is relatively large, occupying space.

[0004] An existing axial piston pump, with the publication number: CN 117006040 A, includes: a pump housing formed by a housing and an end cover; a drive shaft carried by the pump housing; a cylinder block, a flow distribution element, a swash plate, and a bearing bush arranged in the pump housing. A plurality of piston cavities are formed in the cylinder block, and a piston is inserted into each piston cavity. The rear end of each piston is connected to a corresponding slipper. The rear end surfaces of the slippers can slidably abut against a support surface formed by the front surface of the swash plate. The swash plate is swingably supported by the bearing bush. Each piston cavity sucks and discharges the working fluid through the flow distribution element; the axial piston pump includes a lubrication channel. The lubrication channel leads from the flow distribution element through the pump housing to the front surface of the swash plate, and is configured to establish fluid communication between the piston cavity after passing through the oil discharge groove of the flow distribution element and the front surface of the swash plate. This kind of axial piston pump cannot achieve precise monitoring and adjustment of the flow rate, which is not conducive to large-flow production and use.

Content of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a high-precision hydraulic control axial piston pump to assist in displacement output and monitor the oil outlet speed.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A high-precision hydraulic axial piston pump, comprising a housing, a cylinder block, a drive shaft, an arc support portion, a swash plate, an auxiliary column, an oil outlet plunger, an oil outlet passage, a suction plunger, a suction passage, and a distribution plate. The housing is connected to the cylinder block, and cavities are provided inside the housing and the cylinder block. The drive shaft is horizontally provided inside the housing. An L-shaped oil outlet passage and a suction passage are provided inside the cylinder block. The oil outlet passage is connected to the oil outlet plunger through the distribution plate, and the suction passage is connected to the suction plunger through the distribution plate. The oil outlet plunger and the suction plunger are respectively connected to the swash plate. The left side of the swash plate is connected to the arc support portion. An auxiliary column is further provided between the outer ring of the cylinder block and the swash plate.

[0007] Preferably, the drive shaft is connected to the left side of the housing through a bearing, and a sealing ring is provided outside the bearing.

[0008] Preferably, one end of the oil outlet plunger and the suction plunger is connected to one end of the swash plate through a spherical connector.

[0009] Preferably, the left side of the auxiliary column is connected to a fixing block, the fixing block is inserted on the swash plate, and an elastic movable block is provided between the auxiliary columns.

[0010] Preferably, a displacement sensor is provided inside the elastic movable block.

[0011] Preferably, a buffer cavity is provided at the corner of the oil outlet passage, and an annular flowmeter is provided at the end of the oil outlet passage.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For the high-precision hydraulic axial piston pump of the present utility model, the working pressure and flow rate of the pump body can be stabilized by the auxiliary column, the performance instability caused by flow rate fluctuations can be reduced, and the rotation of the pump body can be monitored by the displacement sensor provided inside the elastic movable block;

[0014] 2. The high-precision hydraulic axial piston pump of the present utility model is provided with an annular flowmeter at the output port and a buffer cavity, which can improve the stability of the main body of the piston pump and monitor the flow rate at the output point.

Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the high-precision hydraulic axial piston pump of the present utility model;

[0016] In the figure: 1 - housing, 2 - cylinder block, 3 - drive shaft, 4 - bearing, 5 - arc support part, 6 - swash plate, 7 - fixing block, 8 - auxiliary column, 9 - elastic movable block, 10 - oil outlet plunger, 11 - oil outlet channel, 111 - buffer chamber, 112 - flowmeter, 12 - oil suction plunger, 13 - oil suction channel, 14 - distribution plate, 15 - spherical connecting piece.

Specific Embodiment

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Refer to Figure 1 , in the embodiment of the present invention, a high-precision hydraulic axial piston pump includes a housing 1, a cylinder block 2, a drive shaft 3, an arc support part 5, a swash plate 6, an auxiliary column 8, an oil outlet plunger 10, an oil outlet channel 11, an oil suction plunger 12, an oil suction channel 13, and a distribution plate 14. The housing 1 is connected to the cylinder block 2, and cavities are provided inside the housing 1 and the cylinder block 2. The drive shaft 3 is horizontally provided inside the housing 1, and the drive shaft 3 is connected to the left side of the housing 1 through a bearing 4. A sealing ring is provided outside the bearing 4. An L-shaped oil outlet channel 11 and an oil suction channel 13 are provided inside the cylinder block 2. A buffer chamber 111 is provided at the corner of the oil outlet channel 11, and an annular flowmeter 112 is provided at the end of the oil outlet channel 11. The oil outlet channel 11 is connected to the oil outlet plunger 10 through the distribution plate 14. One ends of the oil outlet plunger 10 and the oil suction plunger 12 are connected to one end of the swash plate 6 through a spherical connecting piece 15. The oil outlet plunger 10 and the oil suction plunger 12 are respectively connected to the swash plate 6. The left side of the swash plate 6 is connected to the arc support part 5. An auxiliary column 8 is further provided outside the direct outer ring of the cylinder block 2 and the swash plate 6. The left side of the auxiliary column 8 is connected to the fixing block 7. The fixing block 7 is inserted into the swash plate 6. An elastic movable block 9 is provided between the auxiliary columns 8, and a displacement sensor is provided inside the elastic movable block 9.

[0019] In actual use of the high-precision hydraulic axial piston pump of the present invention, since the auxiliary column 8 is provided, compared with the prior art, a guide column structure is added, improving the overall stability of the axial piston pump, enhancing the rigidity, and increasing the running accuracy. A displacement sensor is provided inside the elastic movable block 9 in the auxiliary column 8 to monitor the angle of the swash plate 6 and the displacement of the auxiliary column 8, and the angle of the swash plate 6 is adjusted through hydraulic control. Since a flowmeter 112 is provided at the outlet of the oil outlet channel 11, the flow data can be monitored in real time and feedback can be provided, improving the accuracy of the axial piston pump and making the axial piston pump have better practical performance.

[0020] The above embodiments are illustrative of the present utility model and not restrictive thereof. Any solution obtained by a simple transformation of the present utility model falls within the protection scope of the present utility model.

Claims

1. A high-precision hydraulically controlled axial piston pump, characterized in that: The invention comprises a housing (1), a cylinder body (2), a drive shaft (3), an arc support portion (5), a swash plate (6), an auxiliary column (8), an oil outlet plunger (10), an oil outlet passage (11), an oil suction plunger (12), an oil suction passage (13), and an oil distribution plate (14); the housing (1) is connected to the cylinder body (2); cavities are provided inside the housing (1) and the cylinder body (2); a drive shaft (3) is transversely provided inside the housing (1); an L-shaped outlet is provided inside the cylinder body (2); An oil channel (11) and an oil suction channel (13), wherein the oil outlet channel (11) is connected to an oil outlet plunger (10) via an oil distribution plate (14), and the oil suction channel (13) is connected to an oil suction plunger (12) via an oil distribution plate (14). The oil outlet plunger (10) and the oil suction plunger (12) are respectively connected to a swash plate (6), and the left side of the swash plate (6) is connected to an arc support portion (5). An auxiliary column (8) is also provided between the cylinder body (2) and the outer ring of the swash plate (6).

2. A high-precision hydraulically controlled axial piston pump according to claim 1, characterized in that: The driving shaft (3) is connected to the left side of the housing (1) via a bearing (4), and a sealing ring is provided on the outer side of the bearing (4).

3. A high-precision hydraulically controlled axial piston pump according to claim 1, characterized in that: One end of the oil outlet plunger (10) and the oil suction plunger (12) is connected to one end of the swash plate (6) through a spherical connector (15).

4. A high-precision hydraulically controlled axial piston pump according to claim 1, characterized in that: The left side of the auxiliary column (8) is connected to a fixed block (7), the fixed block (7) is plugged into the slant plate (6), and an elastic movable block (9) is arranged between the auxiliary columns (8).

5. A high-precision hydraulically controlled axial piston pump as claimed in claim 4, characterized in that: The elastic movable block (9) is provided with a displacement sensor.

6. A high-precision hydraulically controlled axial piston pump according to claim 1, characterized in that: A buffer chamber (111) is provided at the corner of the oil outlet channel (11), and an annular flow meter (112) is provided at the end of the oil outlet channel (11).

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