A plunger pump
By employing a combination of a square probe and a double-arc spring plate, the measurement error caused by the gap between the probe and the bushing in traditional plunger pumps is solved, thereby improving the flow control and pressure accuracy of the plunger pump.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AVIATION IND INFORMATION CENT
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-09
AI Technical Summary
The gap between the probe and bushing in traditional plunger pumps leads to large angle measurement errors, and the probe tip is prone to wear, affecting measurement accuracy.
The combination of a square probe and a double-arc spring plate ensures a tight fit between the probe and the bushing. The double-arc spring plate provides horizontal pressure, reduces probe displacement, and increases the contact area between the probe and the swashplate.
It improves the accuracy of flow control and pressure precision of plunger pumps, reduces measurement errors, and enhances the stability of the probe and swashplate.
Smart Images
Figure CN224339124U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical manufacturing technology and relates to a plunger pump. Background Technology
[0002] Swashplate piston pumps are primarily used in hydraulic systems. Through the reciprocating motion of the piston, they change the volume of the chamber to achieve oil pressure and suction, thereby regulating the pressure of the hydraulic system. Adjusting the angle of the swashplate regulates the pump's flow rate, thus increasing or decreasing the pressure output and optimizing the mechanical and solvent efficiency of the piston pump. However, because the angle measurement probe of traditional piston pumps is cylindrical and slides within a bushing, a certain gap exists between the probe and the bushing. This gap cannot guarantee a tight fit between the probe body and the bushing, causing measurement errors due to the oscillation of the gap. Furthermore, the tip of the measuring probe has a spherical structure, which is prone to wear. In actual measurements, wear during use increases the error and affects the accuracy of the measurement. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this invention improves the square probe and adds a double-arc spring sheet (2), thereby eliminating inaccurate angle adjustment caused by measurement errors of the gap displacement meter and the tip part when the probe measures the angle, thus improving the accuracy of flow control of the plunger pump and increasing the pressure accuracy of the plunger pump.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a plunger pump, comprising a motor drive shaft 1, a double-arc spring plate 2, a square probe 3, a bushing 4, a swashplate 5, a cylinder body 6, inner plungers 7, and a distribution plate 8; the distribution plate 8, the cylinder body 6, and the swashplate 4 are sequentially mounted on the motor drive shaft 1, the square probe 3 is tightly fitted into the square hole of the bushing 4 through the double-arc spring plate 2, and its lower end is fitted into the swashplate 5, and multiple inner plungers 7 are evenly installed in the cylinder body 6 in a circular and equidistant arrangement.
[0005] The square probe 3 is a cuboid, and the end that fits with the inclined plate 5 is an arc surface.
[0006] The side of the square probe 3 fits snugly against the square hole of the bushing 4.
[0007] The bushing 4 has a disc structure, and the central hole is matched with the motor drive shaft 1.
[0008] The double-arc spring sheet 2 has a sheet-like structure with arc-shaped ends, and is fixed to the bushing 4 through the central mounting hole.
[0009] The inner plunger 7 is a piston structure.
[0010] Compared with the prior art, the present invention has the following advantages based on the above-described technical solution:
[0011] 1) The traditional cylindrical probe has been replaced with a square probe 3. The square probe 3 is a cuboid, and its side surface fits perfectly with the square hole of the bushing 4, which enhances the stability during measurement.
[0012] 2) The double-arc spring plate 2 provides horizontal pressure to the square probe 3 from the side, so that it can fit tightly with the bushing 4 and reduce the displacement of the probe during measurement.
[0013] 3) The top of the square probe 3 is an arc surface, which results in a shorter line contact during measurement, increasing the contact area with the swash plate 5 and improving the stability between the probe and the swash plate. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the original swashplate piston pump;
[0015] Figure 2 This is a schematic diagram of the original probe;
[0016] Figure 3 This is a schematic diagram of the swashplate plunger pump of this utility model;
[0017] Figure 4 This is a large-scale image of a square probe;
[0018] Figure 5 This is a schematic diagram of a double-arc spring sheet.
[0019] Among them: 1-motor drive shaft, 2-double arc spring plate, 3-square probe, 4-bushing, 5-swashplate, 6-cylinder block, 7-inner piston, 8-distributor plate Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and implementation principles. The specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0021] like Figure 2 As shown, a plunger pump includes a motor-driven shaft 1, a double-arc spring plate 2, a square probe 3, a bushing 4, a swashplate 5, a cylinder 6, inner plungers 7, and a distributor plate 8. The distributor plate 8, cylinder 6, swashplate 5, and bushing 4 are sequentially mounted on the motor-driven shaft 1. The square probe 3 is tightly fitted into the square hole of the bushing 4 through the double-arc spring plate 2, and its lower end is fitted into the swashplate 5. Multiple inner plungers 7 are evenly installed in the cylinder 6 and arranged in a circular, equidistant pattern.
[0022] like Figure 4As shown, the square probe 3 is a cuboid with a rounded end that contacts the swashplate 5. One end of the workpiece double-arc spring plate 2 is fixed to the bushing 4, and the other end is pressed against the square probe 3, providing lateral pressure to the square probe 3 to maintain a tight fit between the square probe 3 and the square hole of the bushing 4, reducing measurement errors caused by shaking during measurement.
[0023] The square probe 3 has a rounded tip, resulting in a shorter line of contact during measurement. This increases the contact area with the swashplate 5, improving stability between the probe and the swashplate. Furthermore, the changing contact line during detection reduces wear at the same point on the probe, preventing measurement displacement deviation caused by wear.
[0024] The bushing 4 has a disc structure, and the central hole is matched with the motor drive shaft 1.
[0025] like Figure 5 As shown, the double-arc spring sheet 2 has a sheet-like structure with arc-shaped ends, and is fixed to the bushing 4 through the central mounting hole.
[0026] The inner plunger 7 is a piston structure.
[0027] The working principle of this utility model is as follows:
[0028] When using a swashplate piston pump, the hydraulic pressure needs to be adjusted by changing the angle of the swashplate 5. The square probe 3 is tightly fitted onto the bushing 4 via the double-arc spring plate 2. By lowering the square probe 3 to the swashplate 5 until it is tightly fitted, the tilt angle α of the swashplate 5 is adjusted to control the piston pump pressure value, and the pump can begin operation.
Claims
1. A plunger pump, characterized in that, The components include a motor drive shaft (1), a double-arc spring plate (2), a square probe (3), a bushing (4), a swashplate (5), a cylinder (6), an inner plunger (7), and a distributor plate (8). The distributor plate (8), cylinder (6), swashplate (5), and bushing (4) are installed sequentially on the motor drive shaft (1). The square probe (3) is tightly fitted into the square hole of the bushing (4) through the double-arc spring plate (2), and its lower end is fitted into the swashplate (5). Multiple inner plungers (7) are evenly installed in the cylinder (6) in a circular and equidistant arrangement.
2. A plunger pump according to claim 1, characterized in that, The square probe (3) is a cuboid, and the end that fits with the inclined plate (5) is an arc surface.
3. A plunger pump according to claim 1, characterized in that, The side of the square probe (3) fits in place with the square hole of the bushing (4).
4. A plunger pump according to claim 1, characterized in that, The bushing (4) has a disc structure, and the central hole is matched with the motor drive shaft (1).
5. A plunger pump according to claim 1, characterized in that, The double-arc spring sheet (2) has a sheet-like structure with arc-shaped ends, and is fixed to the bushing (4) through the mounting hole in the middle.
6. A plunger pump according to claim 1, characterized in that, The inner piston (7) is a piston structure.