A device for measuring the internal moving clearance of a hydraulic piston pump and a method for measuring and adjusting it.

Abstract

This invention relates to the field of hydraulic piston pump repair technology, specifically to a device and method for measuring and adjusting the internal clearance of a hydraulic piston pump. The measuring device includes a sleeve with a reference base, a digital caliper installed inside the sleeve, a digital display head mounted on the sleeve, and a probe located at the bottom of the sleeve and connected to the digital caliper. The sleeve also has a rotating screw for positioning the digital caliper after movement. This invention features precise measurement results, a simple method, and ease of use, saving measurement time and improving work efficiency. By providing a device and method for measuring and adjusting the internal clearance of a hydraulic piston pump, it effectively solves the problem that existing electromagnets, installed at the bottom of the housing mounting hole, cannot measure the internal clearance after installation. It can be used for clearance measurement of similar products, solves similar technical problems, has good application prospects, and offers significant economic benefits.

Description

Technical Field

[0001] This invention relates to the field of hydraulic piston pump repair technology, specifically to a device for measuring the internal moving clearance of a hydraulic piston pump and a method for measuring and adjusting it. Background Technology

[0002] The internal clearance between the hydraulic plunger pump housing and the electromagnet is designed to ensure the electromagnet is correctly installed within the pump and prevents collisions. When the hydraulic plunger pump is under high pressure, the electromagnet activates, acting as an unloading mechanism. During hydraulic plunger pump repair, all parts of the electromagnet must be disassembled and inspected. After inspection and repair, the electromagnet is reassembled. It is then reinstalled in the housing via the threaded connection and sealing ring at the electromagnet head. Figure 1 As shown. The clearance S between the electromagnet and the hydraulic plunger pump housing should meet the requirement of 0.8mm to 1.1mm. The mounting hole on the hydraulic plunger pump housing is a deep hole, which is a precision fit part, and the electromagnet is installed at the bottom of the mounting hole of the housing, so it is impossible to measure its internal clearance after installation. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a device for measuring the internal moving clearance of a hydraulic piston pump and a method for measuring and adjusting it.

[0004] The technical problem to be solved by this invention is achieved by the following technical solution:

[0005] A hydraulic piston pump internal clearance measuring device includes a sleeve with a reference base, a digital caliper installed inside the sleeve, a digital display head disposed on the sleeve, a probe located at the bottom of the sleeve and connected to the digital caliper, and a rotating screw disposed on the sleeve for positioning the digital caliper after it moves.

[0006] Preferably, the reference base is fixedly connected to the sleeve and is horizontally distributed.

[0007] Preferably, the sleeve has a guide rail inside, and the digital caliper is slidably mounted on the guide rail.

[0008] Preferably, a bushing is provided at the bottom of the digital caliper and inside the sleeve, and the probe is mounted on the bushing.

[0009] Preferably, the digital display head is provided with buttons for switching and adjustment.

[0010] Preferably, the digital display head is provided with a zeroing switch for zeroing the digital display head during use.

[0011] A method for measuring and adjusting the internal clearance of a hydraulic piston pump, using the aforementioned device for measuring the internal clearance of a hydraulic piston pump, includes the following steps:

[0012] Step (1) Keep the screw loose and align the probe and the reference base on any plane. At this time, zero the measuring device by using the zeroing switch.

[0013] Step (2): After the electromagnet is assembled, use the lower end of the reference base to press against the upper part of the hydraulic plunger pump housing. Under the action of gravity, the probe slides along the guide rail to the bottom of the electromagnet mounting hole of the hydraulic plunger pump. At this time, read the digital display head to obtain the depth of the electromagnet mounting hole as A.

[0014] Step (3) Take out the measuring device, align the upper end of the electromagnet with the reference base, slide the probe along the guide rail to the lower end of the electromagnet, and read the digital display head to obtain the height of the electromagnet as B;

[0015] Step (4) Install the electromagnet into the mounting hole of the hydraulic piston pump housing. After installation, align the upper end of the electromagnet with the probe. Slide the probe along the guide rail until the reference seat moves down to the upper part of the hydraulic piston pump housing. At this time, read the digital display head to obtain the external leakage height of the electromagnet as C.

[0016] Step (5): The internal moving clearance S of the hydraulic plunger pump housing and electromagnet is A+CB. Determine whether the clearance S meets the requirement of 0.8mm to 1.1mm. If the clearance S does not meet the requirement, the value of the clearance S can be adjusted by adjusting the thickness of the adjusting shim on the electromagnet until the requirement is met.

[0017] Preferably, the specific adjustment process in step (v) is as follows:

[0018] Step (51) Disassemble the adjusting pad from the electromagnet, align the upper end of the adjusting pad with the reference base, slide the probe along the guide rail to the lower end of the adjusting pad, and then read the digital display head to obtain the height of the adjusting pad as D.

[0019] Step (52) The thickness of the adjustment shim is increased or decreased by the difference between the measured value and the target value of the gap S. The adjustment shim is re-selected for assembly. After the gap is adjusted, the gap S is re-measured until the gap S meets the requirements.

[0020] The beneficial effects of this invention are:

[0021] This invention features precise measurement results, a simple method, and convenient use, saving measurement time and improving work efficiency. By providing a measuring device and adjustment method for the internal moving clearance of a hydraulic piston pump, it effectively solves the problem that existing electromagnets installed at the bottom of the housing mounting hole cannot measure the internal moving clearance after installation. It can be used for clearance measurement of similar products, solves similar technical problems, has good application prospects, and has significant economic benefits. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 A schematic diagram of the electromagnet assembly for a hydraulic piston pump.

[0024] Figure 2 This is a three-dimensional structural diagram of the device;

[0025] Figure 3 This is a schematic diagram of the right-side structure of the device;

[0026] Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure.

[0027] In the diagram: 1. Button; 2. Rotary screw; 3. Digital caliper; 4. Zeroing switch; 5. Reference base; 6. Bushing; 7. Probe; 8. Guide rail; 9. Digital display head; 10. Sleeve. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figures 2 to 4 As shown, a hydraulic piston pump internal clearance measuring device includes a button 1, a rotating screw 2, a digital caliper 3, a zeroing switch 4, a reference base 5, a bushing 6, a probe 7, a guide rail 8, a digital display head 9, and a sleeve 10.

[0030] The reference base 5 is connected to the sleeve 10 and is horizontally distributed. The guide rail 8 is placed inside the sleeve 10, and the digital caliper 3 is slidably mounted on the guide rail 8, which guides the up-and-down movement of the digital caliper 3. The button 1 is located on the digital display head 9 and serves as the switch and adjustment button for the digital display head 9. The zeroing switch 4 is located on the digital display head 9 and is used to zero the digital display head 9 during use. The digital display head 9 is fixed on the sleeve 10 and is used to read the digital caliper 3. The bushing 6 is installed inside the sleeve 10 and connected to the bottom of the digital caliper 3. The upper end of the probe 7 is mounted on the bushing 6. The probe 7 ensures a surface roughness of Ra0.8μm, avoiding secondary damage to the measured part during measurement. The outer diameter of the probe 7 is consistent with the outer diameter of the electromagnet and ensures a parallelism tolerance of 0.01mm, avoiding measurement errors caused by unevenness at the bottom of the mounting hole of the hydraulic plunger pump electromagnet, which cannot be identified by traditional measurement methods. The rotating screw 2 is threaded onto the sleeve 10. When the rotating screw 2 is rotated and tightened, it will press against the digital caliper 3, which can fix the digital caliper 3 at any position on the guide rail 8. When the rotating screw 2 is not tightened, the probe 7 slides to the bottom of the guide rail 8 under the action of gravity.

[0031] A method for measuring and adjusting the internal clearance of a hydraulic piston pump, using the aforementioned device for measuring the internal clearance of a hydraulic piston pump, includes the following steps:

[0032] Step (1) Rotate screw 2 to keep it loose, align probe 7 and reference base 5 on any plane, and then zero the measuring device by using zeroing switch 4.

[0033] Step (II) The hydraulic plunger pump electromagnet is pressed... Figure 1 After assembly, the lower end of the reference base 5 is used to press against the upper part of the hydraulic plunger pump housing. Under the action of gravity, the probe 7 slides along the guide rail 8 to the bottom of the electromagnet mounting hole of the hydraulic plunger pump. At this time, the digital display head 9 is read to obtain the depth of the electromagnet mounting hole as A.

[0034] Step (3) Take out the measuring device, align the upper end of the electromagnet with the reference base 5, slide the probe 7 along the guide rail 8 to the lower end of the electromagnet, and read the digital display head 9 to obtain the height of the electromagnet as B.

[0035] Step (4) Install the electromagnet into the mounting hole of the hydraulic piston pump housing. After installation, align the upper end of the electromagnet with the probe 7. Slide the probe 7 along the guide rail 8 until the reference seat 5 moves downward to the upper part of the hydraulic piston pump housing. At this time, read the digital display head 9 to obtain the external leakage height of the electromagnet as C.

[0036] Step (5): The internal moving clearance S of the hydraulic plunger pump housing and electromagnet is A+CB. Determine whether the clearance S meets the requirement of 0.8mm to 1.1mm. If the clearance S does not meet the requirement, the value of the clearance S can be adjusted by adjusting the thickness of the adjusting shim on the electromagnet until the requirement is met.

[0037] The specific adjustment process is as follows:

[0038] Disassemble the adjusting shim from the electromagnet, align the upper end of the adjusting shim with the reference base 5, and slide the probe 7 along the guide rail 8 to the lower end of the adjusting shim. At this time, read the value of the digital display 9 to obtain the height of the adjusting shim as D. The increase or decrease in the thickness of the adjusting shim is equal to the difference between the measured value and the target value of the gap S. Select a new adjusting shim for reassembly, and remeasure the gap S after the gap is adjusted until the gap S meets the requirements.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely prisms of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for measuring and adjusting the internal moving clearance of a hydraulic piston pump, characterized in that: A device for measuring the internal clearance of a hydraulic piston pump is provided. The device includes a sleeve (10) with a reference base (5), a digital caliper (3) installed inside the sleeve (10), a digital display head (9) set on the sleeve (10), and a probe (7) located at the bottom of the sleeve (10) and connected to the digital caliper (3). The sleeve (10) is also provided with a rotating screw (2) for positioning the digital caliper (3) after it moves. The sleeve (10) is provided with a guide rail (8) inside the sleeve (10). The digital caliper (3) is slidably installed on the guide rail (8). The digital display head (9) is provided with a zeroing switch (4) for zeroing the digital display head (9) during use. Includes the following steps: Step (1) Rotate the screw (2) to keep it loose, align the probe (7) and the reference base (5) on any plane, and then zero the measuring device by using the zeroing switch (4); Step (2) After the electromagnet is assembled, the lower end of the reference base (5) is used to press against the upper part of the hydraulic plunger pump housing. Under the action of gravity, the probe (7) slides along the guide rail (8) to the bottom of the electromagnet mounting hole of the hydraulic plunger pump. At this time, the digital display head (9) is read to obtain the depth of the electromagnet mounting hole as A. Step (3) Take out the measuring device, align the upper end of the electromagnet with the reference base (5), slide the probe (7) along the guide rail (8) to the lower end of the electromagnet, and read the digital display head (9) to obtain the height of the electromagnet as B; Step (4) Install the electromagnet into the mounting hole of the hydraulic piston pump housing. After installation, align the upper end of the electromagnet with the probe (7). Slide the probe (7) along the guide rail (8) until the reference seat (5) moves down to the upper part of the hydraulic piston pump housing. At this time, read the digital display head (9) to obtain the external leakage height of the electromagnet as C. Step (5): The internal moving clearance S of the hydraulic plunger pump housing and electromagnet is A+CB. Determine whether the clearance S meets the requirement of 0.8mm to 1.1mm. If the clearance S does not meet the requirement, the value of the clearance S can be adjusted by adjusting the thickness of the adjusting shim on the electromagnet until the requirement is met.

2. The method for measuring and adjusting the internal moving clearance of a hydraulic piston pump according to claim 1, characterized in that: The specific adjustment process in step (five) is as follows: Step (51) Disassemble the adjustment pad from the electromagnet, align the upper end of the adjustment pad with the reference base (5), slide the probe (7) along the guide rail (8) to the lower end of the adjustment pad, and read the digital display head (9) to obtain the height of the adjustment pad as D; Step (52) The thickness of the adjustment shim is increased or decreased by the difference between the measured value and the target value of the gap S. The adjustment shim is re-selected for assembly. After the gap is adjusted, the gap S is re-measured until the gap S meets the requirements.

3. The method for measuring and adjusting the internal moving clearance of a hydraulic piston pump according to claim 1, characterized in that: The reference base (5) is fixedly connected to the sleeve (10) and is horizontally distributed.

4. The method for measuring and adjusting the internal moving clearance of a hydraulic piston pump according to claim 1, characterized in that: A bushing (6) is provided at the bottom of the digital caliper (3) and inside the sleeve (10), and the probe (7) is mounted on the bushing (6).

5. The method for measuring and adjusting the internal moving clearance of a hydraulic piston pump according to claim 1, characterized in that: The digital display head (9) is equipped with buttons (1) for switching and adjustment.

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