Method, device and system for detecting pull-off force of sliding shoe

Abstract

The present application provides a method, device and system for detecting the pull-off force of a sliding shoe. The detection device for the pull-off force of the sliding shoe comprises a rotary drive assembly, a plunger, a sliding shoe and an axial drive assembly. The plunger and the sliding shoe are hingedly connected, the rotary drive assembly is connected to the plunger, and the axial drive assembly is connected to the sliding shoe. The method for detecting the pull-off force of the sliding shoe comprises: controlling the rotary drive assembly to drive the plunger to rotate at a predetermined speed, which is the rotation speed of the plunger during actual use; controlling the axial drive assembly to drive the sliding shoe to move in a predetermined direction until the plunger and the sliding shoe are separated, which is the direction away from the plunger on the axis of the sliding shoe; and calculating the pull-off force of the sliding shoe according to the driving current of the axial drive assembly. The method solves the problem of low accuracy of the detection method of the pull-off force of the sliding shoe in the prior art.

Description

Technical Field

[0001] The present application relates to the field of reliability detection, and in particular, to a method for detecting a pull-off force of a sliding shoe, a detection device, a computer-readable storage medium, a processor, and a detection system. Background Art

[0002] The process of the slipper of the plunger pump is directly related to the reliability design capability of the internal structure of the plunger pump, and is an important link that needs to be verified before design. The slipper pull-off force of the axial piston pump is a key indicator for evaluating the reliability of the plunger-slipper structure. How to achieve the simulation measurement of the process of the plunger being pulled off the slipper under the condition of simulating actual working conditions is the current key technical problem.

[0003] The existing detection method is to use an axial device on a test bench to pull the plunger and the slipper to achieve the separation, and then measure the maximum pulling force of the pull-off. It does not consider the axial rotation simulation of the plunger in the slipper, nor does it detect the slipper pull-off force under the working condition where the plunger and the slipper form a certain angle.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country for those skilled in the art. Summary of the invention

[0005] The main purpose of the present application is to provide a method for detecting the pull-off force of a slipper, a detection device, a computer-readable storage medium, a processor and a detection system to solve the problem of low accuracy of the method for detecting the pull-off force of a slipper in the prior art.

[0006] According to one aspect of an embodiment of the present invention, a method for detecting a shoe pull-off force is provided, wherein the shoe pull-off force detection device comprises a rotary drive assembly, a plunger, a shoe and an axial drive assembly, wherein the plunger and the shoe are hingedly connected, the rotary drive assembly is connected to the plunger, and the axial drive assembly is connected to the shoe, and the detection method comprises: controlling the rotary drive assembly to drive the plunger to rotate at a predetermined speed, wherein the predetermined speed is the rotation speed of the plunger during actual use; controlling the axial drive assembly to drive the shoe to move in a predetermined direction until the plunger and the shoe are separated, wherein the predetermined direction is a direction on the axis of the shoe away from the plunger; and calculating the shoe pull-off force according to the driving current of the axial drive assembly.

[0007] Optionally, the device for detecting the pull-off force of the sliding shoe further includes a stress sensor and / or a strain sensor, and the stress sensor and / or the strain sensor are arranged on the outer wall of the sliding shoe, and controls the axial drive assembly to drive the sliding shoe to move in a predetermined direction until the plunger and the sliding shoe are separated, including: controlling the axial drive assembly to drive the sliding shoe to move in a predetermined direction, and recording the measured value of the stress sensor and / or the measured value of the strain sensor; determining that the plunger and the sliding shoe are separated when the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged; and controlling the axial drive assembly to stop running.

[0008] Optionally, controlling the axial drive assembly to drive the sliding shoe to move in a predetermined direction and recording the measured value of the stress sensor and / or the measured value of the strain sensor includes: increasing the drive current of the axial drive assembly at a predetermined rate until the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, and keeping the drive current of the axial drive assembly unchanged.

[0009] Optionally, the axial drive assembly includes an electromagnetic coil and a magnetic pull rod, the electromagnetic coil, the magnetic pull rod and the slide shoe are coaxially installed, the magnetic pull rod is connected to the slide shoe and is located between the electromagnetic coil and the slide shoe, and the slide shoe pull-off force is calculated according to the driving current of the axial drive assembly, including: substituting the driving current of the electromagnetic coil into F=nBIL to calculate the slide shoe pull-off force, wherein n is the number of turns of the electromagnetic coil, B is the magnetic induction intensity of the electromagnetic coil, I is the driving current of the electromagnetic coil, and L is the length of the electromagnetic coil.

[0010] Optionally, before controlling the rotary drive assembly to drive the plunger to rotate at a predetermined speed, the method further includes: adjusting the angle between the axis of the plunger and the axis of the slipper to a predetermined angle, wherein the predetermined angle corresponds one-to-one to the slipper pull-off force.

[0011] Optionally, the predetermined angle includes at least a limit angle, and the limit angle includes a first limit angle and a second limit angle, the first limit angle is the maximum angle when the axis of the plunger and the axis of the sliding shoe are not parallel, and the second limit angle is the angle when the axis of the plunger and the axis of the sliding shoe are parallel, and the first limit angle and the second limit angle are both between 0° and 90°.

[0012] According to another aspect of an embodiment of the present invention, a device for detecting a shoe pull-off force is further provided. The shoe pull-off force detection device includes a rotary drive assembly, a plunger, a shoe and an axial drive assembly, the plunger and the shoe are hingedly connected, the rotary drive assembly is connected to the plunger, and the axial drive assembly is connected to the shoe, the detection device includes: a first control unit, used to control the rotary drive assembly to drive the plunger to rotate at a predetermined speed, the predetermined speed is the rotation speed of the plunger during actual use; a second control unit, used to control the axial drive assembly to drive the shoe to move in a predetermined direction until the plunger and the shoe are separated, the predetermined direction is the direction on the axis of the shoe away from the plunger; a calculation unit, used to calculate the shoe pull-off force based on the driving current of the axial drive assembly.

[0013] According to yet another aspect of the embodiments of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the methods described.

[0014] According to yet another aspect of an embodiment of the present invention, a processor is provided, wherein the processor is used to run a program, wherein any one of the methods is executed when the program is run.

[0015] According to another aspect of an embodiment of the present invention, a system for detecting a slipper pull-off force is provided, comprising: a slipper pull-off force detection device, one or more processors, a memory, a display device, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include methods for executing any one of the methods.

[0016] In an embodiment of the present invention, in the above-mentioned method for detecting the pull-off force of the sliding shoe, first, the above-mentioned rotary drive component is controlled to drive the above-mentioned plunger to rotate at a predetermined speed, and the above-mentioned predetermined speed is the rotation speed of the above-mentioned plunger during actual use; then, the above-mentioned axial drive component is controlled to drive the above-mentioned sliding shoe to move along a predetermined direction until the above-mentioned plunger and the above-mentioned sliding shoe are separated, and the above-mentioned predetermined direction is the direction away from the above-mentioned plunger on the axis of the above-mentioned sliding shoe; finally, the sliding shoe pull-off force is calculated according to the driving current of the above-mentioned axial drive component. This detection method controls the rotary drive component to drive the plunger to rotate at a predetermined speed, simulates the axial rotation of the plunger during actual operation, makes the detection result more consistent with the actual working conditions, improves the accuracy of the detection, solves the problem of low accuracy of the detection method of the sliding shoe pull-off force in the prior art, and can evaluate the reliability of the plunger-shoe structure through the above-mentioned sliding shoe pull-off force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic diagram showing a device for detecting the pull-off force of a sliding shoe according to an embodiment of the present application is shown;

[0019] Figure 2 A flow chart showing a method for detecting a pull-off force of a sliding shoe according to an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing a device for detecting the pull-off force of a sliding shoe according to another embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram of a device for detecting the pull-off force of a sliding shoe according to an embodiment of the present application is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. Electromagnetic coil; 2. Magnetic pull rod; 3. Slipper chuck; 4. Slipper; 5. Plunger; 6. Plunger chuck; 7. Connecting plate; 8. Coupling; 9. Rotating motor; 10. Motor bracket; 11. Plunger chuck bracket; 12. Slipper chuck bracket; 13. Pressure oil source; 14. Friction plate; 15. Stress sensor; 16. Strain sensor. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0027] For the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0028] Slipper: A structural part that is hingedly connected to the plunger structure in a plunger pump;

[0029] Plunger: The structural component inside the pump that performs volume compression pumping.

[0030] As mentioned in the background technology, the accuracy of the detection method of the pull-off force of the sliding shoe in the prior art is low. In order to solve the above problem, in a typical embodiment of the present application, a detection method, a detection device, a computer-readable storage medium, a processor and a detection system for the pull-off force of the sliding shoe are provided.

[0031] According to an embodiment of the present application, a method for detecting a pull-off force of a sliding shoe is provided. The method for detecting a pull-off force of a sliding shoe is applied to a detection device for detecting a pull-off force of a sliding shoe, such as Figure 1 As shown, the device for detecting the pull-off force of the sliding shoe includes a rotary drive assembly, a sliding shoe 4, a plunger 5 and an axial drive assembly. The plunger 5 and the sliding shoe 4 are hingedly connected, the rotary drive assembly is connected to the plunger 5, and the axial drive assembly is connected to the sliding shoe 4.

[0032] Figure 2 FIG. 1 is a flow chart of a method for detecting the pull-off force of a sliding shoe according to an embodiment of the present application. Figure 2 As shown, the method comprises the following steps:

[0033] Step S101, controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, where the predetermined speed is the rotation speed of the plunger during actual use;

[0034] Step S102, controlling the axial drive assembly to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, wherein the predetermined direction is a direction on the axis of the sliding shoe away from the plunger;

[0035] Step S103, calculating the pull-off force of the sliding shoe according to the driving current of the axial driving assembly.

[0036] In the above-mentioned method for detecting the pull-off force of the sliding shoe, first, the above-mentioned rotary drive component is controlled to drive the above-mentioned plunger to rotate at a predetermined speed, and the above-mentioned predetermined speed is the rotation speed of the above-mentioned plunger during actual use; then, the above-mentioned axial drive component is controlled to drive the above-mentioned sliding shoe to move in a predetermined direction until the above-mentioned plunger and the above-mentioned sliding shoe are separated, and the above-mentioned predetermined direction is the direction away from the above-mentioned plunger on the axis of the above-mentioned sliding shoe; finally, the sliding shoe pull-off force is calculated according to the driving current of the above-mentioned axial drive component. This detection method controls the rotary drive component to drive the plunger to rotate at a predetermined speed, simulates the axial rotation of the plunger during actual operation, makes the detection result more consistent with the actual working conditions, improves the accuracy of the detection, solves the problem of low accuracy of the detection method of the sliding shoe pull-off force in the prior art, and can evaluate the reliability of the plunger-shoe structure through the above-mentioned sliding shoe pull-off force.

[0037] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0038] It should also be noted that if Figure 1 As shown, the above-mentioned rotation drive assembly includes a plunger chuck 6, a connecting plate 7, a coupling 8, a rotating motor 9, a motor bracket 10, and a plunger chuck bracket 11 connected in sequence. The above-mentioned motor bracket 10 is used to support the rotating motor 9, and the plunger chuck bracket 11 is used to support the plunger chuck 6. The rotating motor 9 drives the coupling 8 and the connecting plate 7, so that the connecting plate 7 drives the plunger chuck 6 to rotate, thereby realizing the rotation of the plunger 5 clamped by the plunger chuck 6. The above-mentioned sliding shoe pull-off force detection equipment also includes a friction plate 14 to realize the forward and reverse switching of the plunger 5.

[0039] In an optional embodiment of the present application, Figure 1As shown, the detection device for the pull-off force of the sliding shoe also includes a stress sensor 15 and / or a strain sensor 16, and the stress sensor 15 and / or the strain sensor 16 are arranged on the outer wall of the sliding shoe 4, and the axial driving component is controlled to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, including: controlling the axial driving component to drive the sliding shoe to move along a predetermined direction, and recording the measured value of the stress sensor and / or the measured value of the strain sensor; determining that the plunger and the sliding shoe are separated when the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged; and controlling the axial driving component to stop running. Specifically, the stress sensor 15 and / or the strain sensor 16 are arranged on the outer wall of the sliding shoe 4. The detection process monitors the changes of stress and / or strain on the sliding shoe in real time, and determines whether the plunger and the sliding shoe are separated by the changes of stress and / or strain. When the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged, it indicates that the deformation of the sliding shoe has been finalized, that is, the plunger and the sliding shoe are separated, that is, the pull-off force detection is completed, and the axial drive assembly can stop running.

[0040] In a specific embodiment of the present application, the axial drive assembly is controlled to drive the sliding shoe to move along a predetermined direction, and the measured value of the stress sensor and / or the measured value of the strain sensor are recorded, including: increasing the driving current of the axial drive assembly at a predetermined rate until the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, and keeping the driving current of the axial drive assembly unchanged. Specifically, before the detection, the magnitude of the sliding shoe pull-off force is unknown, and the driving current of the axial drive assembly is initially set to be small, and then the driving current is gradually increased at a predetermined rate to prevent the initial pull-off force from being too large and directly pulling off the plunger-shoe structure, resulting in inaccurate pull-off force detection. As the driving current increases, the pulling force gradually increases. When the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, it indicates that the sliding shoe has undergone a large deformation, that is, the current pulling force can pull the plunger out of the sliding shoe. The pull-off force detection can be completed by keeping the driving current of the axial drive assembly unchanged.

[0041] In a specific embodiment of the present application, Figure 1As shown, the axial drive assembly includes an electromagnetic coil 1 and a magnetic pull rod 2. The electromagnetic coil 1, the magnetic pull rod 2 and the sliding shoe 4 are coaxially installed. The magnetic pull rod 2 is connected to the sliding shoe 4 and is located between the electromagnetic coil 1 and the sliding shoe 4. The sliding shoe pull-off force is calculated according to the driving current of the axial drive assembly, including: substituting the driving current of the electromagnetic coil into F=nBIL to calculate the sliding shoe pull-off force, wherein n is the number of turns of the electromagnetic coil, B is the magnetic induction intensity of the electromagnetic coil, I is the driving current of the electromagnetic coil, and L is the length of the electromagnetic coil. Specifically, as Figure 1 As shown, the detection equipment of the above-mentioned sliding shoe pull-off force also includes a sliding shoe chuck 3, the above-mentioned sliding shoe 4 is installed in the sliding shoe chuck 3, the above-mentioned sliding shoe chuck 3 is connected to the above-mentioned magnetic pull rod 2, the above-mentioned electromagnetic coil 1, the above-mentioned magnetic pull rod 2 and the above-mentioned sliding shoe chuck 3 are coaxially installed, and the electromagnetic force of the above-mentioned electromagnetic coil 1 forms an axial driving force, which can drive the above-mentioned sliding shoe chuck 3 through the above-mentioned magnetic pull rod 2, so that the above-mentioned sliding shoe chuck 3 carries the above-mentioned sliding shoe 4 to move axially, and the above-mentioned driving force separates the above-mentioned plunger and the above-mentioned sliding shoe. Therefore, the above-mentioned sliding shoe pull-off force is the electromagnetic force of the above-mentioned electromagnetic coil 1, and the above-mentioned sliding shoe pull-off force can be calculated by using the calculation formula of the above-mentioned electromagnetic force F.

[0042] It should be noted that if Figure 1 As shown, the above-mentioned detection equipment for the slipper pull-off force also includes a slipper chuck bracket 12 and a pressure oil source 13. The slipper chuck bracket 12 can reduce the stress on the slipper fixed by the slipper chuck bracket 12 and improve the service life. The above-mentioned pressure oil source 13 connects the gap formed between the slipper 4 and the slipper chuck 3 to form a supporting oil film.

[0043] In a specific embodiment of the present application, before controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, the method further includes: adjusting the angle between the axis of the plunger and the axis of the shoe to a predetermined angle, wherein the predetermined angle corresponds to the pull-off force of the shoe. Specifically, adjusting the angle between the axis of the plunger and the axis of the shoe to a predetermined angle, such as Figure 3 As shown, the shoe pull-off force obtained by subsequent testing is the shoe pull-off force under the above-mentioned predetermined angle. The shoe pull-off force is different under different predetermined angles, so the shoe pull-off force under various working conditions can be obtained, making the evaluation of the reliability of the plunger-shoe structure more comprehensive.

[0044] In a specific embodiment of the present application, the predetermined angle at least includes a limit angle, and the limit angle includes a first limit angle and a second limit angle. The first limit angle is the maximum angle when the axis of the plunger and the axis of the shoe are not parallel, and the second limit angle is the angle when the axis of the plunger and the axis of the shoe are parallel, and the first limit angle and the second limit angle are both between 0° and 90°. Specifically, the predetermined angle at least includes the limit angle, that is, the shoe pull-off force under the limit working condition is detected, which is more reliable for evaluating the reliability of the plunger-shoe structure.

[0045] It should be noted that the above plunger-slipper structure is a component of an axial piston pump, and plunger-slipper structures of the same batch are used for different angles to reduce errors caused by components.

[0046] The present application also provides a device for detecting the pull-off force of a slipper. It should be noted that the device for detecting the pull-off force of a slipper in the present application can be used to execute the method for detecting the pull-off force of a slipper provided in the present application. The following is an introduction to the device for detecting the pull-off force of a slipper provided in the present application.

[0047] Figure 4 Schematic diagram of a device for detecting the pull-off force of a sliding shoe according to an embodiment of the present application. Figure 4 As shown, the device comprises:

[0048] The first control unit 100 is used to control the rotation drive assembly to drive the plunger to rotate at a predetermined speed, where the predetermined speed is the rotation speed of the plunger during actual use;

[0049] A second control unit 200 is used to control the axial drive assembly to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, and the predetermined direction is a direction on the axis of the sliding shoe away from the plunger;

[0050] The calculation unit 300 is used to calculate the pull-off force of the sliding shoe according to the driving current of the above-mentioned axial driving assembly.

[0051] In the above-mentioned detection device for the pull-off force of the sliding shoe, the first control unit controls the above-mentioned rotary drive component to drive the above-mentioned plunger to rotate at a predetermined speed, and the above-mentioned predetermined speed is the rotation speed of the above-mentioned plunger during actual use; the second control unit controls the above-mentioned axial drive component to drive the above-mentioned sliding shoe to move along a predetermined direction until the above-mentioned plunger and the above-mentioned sliding shoe are separated, and the above-mentioned predetermined direction is the direction away from the above-mentioned plunger on the axis of the above-mentioned sliding shoe; the calculation unit calculates the pull-off force of the sliding shoe according to the driving current of the above-mentioned axial drive component. The detection device controls the rotary drive component to drive the plunger to rotate at a predetermined speed, simulates the axial rotation of the plunger during actual operation, makes the detection result more consistent with the characteristics of actual working conditions, improves the accuracy of detection, solves the problem of low accuracy of the detection method of the sliding shoe pull-off force in the prior art, and can evaluate the reliability of the plunger-shoe structure through the above-mentioned sliding shoe pull-off force.

[0052] It should be noted that if Figure 1 As shown, the above-mentioned rotation drive assembly includes a plunger chuck 6, a connecting plate 7, a coupling 8, a rotating motor 9, a motor bracket 10, and a plunger chuck bracket 11 connected in sequence. The above-mentioned motor bracket 10 is used to support the rotating motor 9, and the plunger chuck bracket 11 is used to support the plunger chuck 6. The rotating motor 9 drives the coupling 8 and the connecting plate 7, so that the connecting plate 7 drives the plunger chuck 6 to rotate, thereby realizing the rotation of the plunger 5 clamped by the plunger chuck 6. The above-mentioned sliding shoe pull-off force detection equipment also includes a friction plate 14 to realize the forward and reverse switching of the plunger 5.

[0053] In an optional embodiment of the present application, Figure 1 As shown, the above-mentioned detection device for the pull-off force of the sliding shoe also includes a stress sensor 15 and / or a strain sensor 16, and the above-mentioned stress sensor 15 and / or the above-mentioned strain sensor 16 are arranged on the outer wall of the above-mentioned sliding shoe 4, and the above-mentioned second control unit includes a control module and a determination module, wherein the above-mentioned control module is used to control the above-mentioned axial drive component to drive the above-mentioned sliding shoe to move along a predetermined direction, and record the measurement value of the above-mentioned stress sensor and / or the measurement value of the above-mentioned strain sensor; the above-mentioned determination module is used to determine that the above-mentioned plunger and the above-mentioned sliding shoe are separated when the measurement value of the above-mentioned stress sensor and / or the measurement value of the above-mentioned strain sensor remains unchanged; and control the above-mentioned axial drive component to stop running. Specifically, the stress sensor 15 and / or the strain sensor 16 are arranged on the outer wall of the sliding shoe 4. The detection process monitors the changes of stress and / or strain on the sliding shoe in real time, and determines whether the plunger and the sliding shoe are separated by the changes of stress and / or strain. When the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged, it indicates that the deformation of the sliding shoe has been finalized, that is, the plunger and the sliding shoe are separated, that is, the pull-off force detection is completed, and the axial drive assembly can stop running.

[0054] In a specific embodiment of the present application, the control module includes an adjustment submodule, which is used to increase the driving current of the axial drive assembly at a predetermined rate until the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, and the driving current of the axial drive assembly is kept unchanged. Specifically, before the detection, the magnitude of the pull-off force of the shoe is unclear, and the driving current of the axial drive assembly is initially set to be relatively small. Thereafter, the driving current is gradually increased at a predetermined rate to prevent the initial pull-off force from being too large and directly pulling off the plunger-shoe structure, resulting in inaccurate pull-off force detection. As the driving current increases, the pulling force gradually increases. When the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, it indicates that the shoe has undergone a large deformation, that is, the current pulling force can pull the plunger out of the shoe. The pull-off force detection can be completed by keeping the driving current of the axial drive assembly unchanged.

[0055] In a specific embodiment of the present application, Figure 1 As shown, the axial drive assembly includes an electromagnetic coil 1 and a magnetic pull rod 2. The electromagnetic coil 1, the magnetic pull rod 2 and the sliding shoe 4 are coaxially installed. The magnetic pull rod 2 is connected to the sliding shoe 4 and is located between the electromagnetic coil 1 and the sliding shoe 4. The calculation unit includes a calculation module. The calculation module is used to substitute the driving current of the electromagnetic coil into F=nBIL to calculate the sliding shoe pull-off force, wherein n is the number of turns of the electromagnetic coil, B is the magnetic induction intensity of the electromagnetic coil, I is the driving current of the electromagnetic coil, and L is the length of the electromagnetic coil. Specifically, as Figure 1 As shown, the detection equipment of the above-mentioned sliding shoe pull-off force also includes a sliding shoe chuck 3, the above-mentioned sliding shoe 4 is installed in the sliding shoe chuck 3, the above-mentioned sliding shoe chuck 3 is connected to the above-mentioned magnetic pull rod 2, the above-mentioned electromagnetic coil 1, the above-mentioned magnetic pull rod 2 and the above-mentioned sliding shoe chuck 3 are coaxially installed, and the electromagnetic force of the above-mentioned electromagnetic coil 1 forms an axial driving force, which can drive the above-mentioned sliding shoe chuck 3 through the above-mentioned magnetic pull rod 2, so that the above-mentioned sliding shoe chuck 3 carries the above-mentioned sliding shoe 4 to move axially, and the above-mentioned driving force separates the above-mentioned plunger and the above-mentioned sliding shoe. Therefore, the above-mentioned sliding shoe pull-off force is the electromagnetic force of the above-mentioned electromagnetic coil 1, and the above-mentioned sliding shoe pull-off force can be calculated by using the calculation formula of the above-mentioned electromagnetic force F.

[0056] It should be noted that if Figure 1 As shown, the above-mentioned detection equipment for the slipper pull-off force also includes a slipper chuck bracket 12 and a pressure oil source 13. The slipper chuck bracket 12 can reduce the stress on the slipper fixed by the slipper chuck bracket 12 and improve the service life. The above-mentioned pressure oil source 13 connects the gap formed between the slipper 4 and the slipper chuck 3 to form a supporting oil film.

[0057] In a specific embodiment of the present application, the device further comprises an adjustment unit, which is used to adjust the angle between the axis of the plunger and the axis of the shoe to a predetermined angle before controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, wherein the predetermined angle corresponds to the pull-off force of the shoe. Specifically, the angle between the axis of the plunger and the axis of the shoe is adjusted to the predetermined angle, such as Figure 3 As shown, the shoe pull-off force obtained by subsequent testing is the shoe pull-off force under the above-mentioned predetermined angle. The shoe pull-off force is different under different predetermined angles, so the shoe pull-off force under various working conditions can be obtained, making the evaluation of the reliability of the plunger-shoe structure more comprehensive.

[0058] In a specific embodiment of the present application, the predetermined angle at least includes a limit angle, and the limit angle includes a first limit angle and a second limit angle. The first limit angle is the maximum angle when the axis of the plunger and the axis of the shoe are not parallel, and the second limit angle is the angle when the axis of the plunger and the axis of the shoe are parallel, and the first limit angle and the second limit angle are both between 0° and 90°. Specifically, the predetermined angle at least includes the limit angle, that is, the shoe pull-off force under the limit working condition is detected, which is more reliable for evaluating the reliability of the plunger-shoe structure.

[0059] The above-mentioned detection device for the pull-off force of the sliding shoe includes a processor and a memory. The above-mentioned first control unit, second control unit and calculation unit are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0060] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be provided, and the problem of low accuracy of the detection method of the pull-off force of the sliding shoe in the prior art can be solved by adjusting the kernel parameters.

[0061] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0062] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the above method is implemented.

[0063] An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the method is executed when the program is run.

[0064] An embodiment of the present invention provides a system for detecting the pull-off force of a sliding shoe. The system includes a detection device for detecting the pull-off force of a sliding shoe, a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are implemented:

[0065] Step S101, controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, where the predetermined speed is the rotation speed of the plunger during actual use;

[0066] Step S102, controlling the axial drive assembly to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, wherein the predetermined direction is a direction on the axis of the sliding shoe away from the plunger;

[0067] Step S103, calculating the pull-off force of the sliding shoe according to the driving current of the axial driving assembly.

[0068] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing at least the following method steps:

[0069] Step S101, controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, where the predetermined speed is the rotation speed of the plunger during actual use;

[0070] Step S102, controlling the axial drive assembly to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, wherein the predetermined direction is a direction on the axis of the sliding shoe away from the plunger;

[0071] Step S103, calculating the pull-off force of the sliding shoe according to the driving current of the axial driving assembly.

[0072] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above-mentioned units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0074] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0075] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0076] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a computer-readable storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned methods of each embodiment of the present invention. The aforementioned computer-readable storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0077] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0078] 1) In the method for detecting the pull-off force of the slipper of the present application, first, the rotary drive assembly is controlled to drive the plunger to rotate at a predetermined speed, and the predetermined speed is the rotation speed of the plunger during actual use; then, the axial drive assembly is controlled to drive the slipper to move in a predetermined direction until the plunger and the slipper are separated, and the predetermined direction is the direction away from the plunger on the axis of the slipper; finally, the pull-off force of the slipper is calculated according to the driving current of the axial drive assembly. The detection method controls the rotary drive assembly to drive the plunger to rotate at a predetermined speed, simulates the axial rotation of the plunger during actual operation, makes the detection result more consistent with the actual working conditions, improves the accuracy of the detection, solves the problem of low accuracy of the detection method of the slipper pull-off force in the prior art, and can evaluate the reliability of the plunger-slipper structure through the slipper pull-off force.

[0079] 2) In the detection device of the slipper pull-off force of the present application, the first control unit controls the above-mentioned rotary drive component to drive the above-mentioned plunger to rotate at a predetermined speed, and the above-mentioned predetermined speed is the rotation speed of the above-mentioned plunger during actual use; the second control unit controls the above-mentioned axial drive component to drive the above-mentioned slipper to move along a predetermined direction until the above-mentioned plunger and the above-mentioned slipper are separated, and the above-mentioned predetermined direction is the direction away from the above-mentioned plunger on the axis of the above-mentioned slipper; the calculation unit calculates the slipper pull-off force according to the driving current of the above-mentioned axial drive component. The detection device controls the rotary drive component to drive the plunger to rotate at a predetermined speed, simulates the axial rotation of the plunger during actual operation, makes the detection result more consistent with the actual working conditions, improves the accuracy of the detection, solves the problem of low accuracy of the detection method of the slipper pull-off force in the prior art, and can evaluate the reliability of the plunger-slipper structure through the above-mentioned slipper pull-off force.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for detecting the pull-off force of a sliding shoe, characterized in that: The detection device of the sliding shoe pull-off force comprises a rotary drive assembly, a plunger, a sliding shoe and an axial drive assembly, wherein the plunger and the sliding shoe are hingedly connected, the rotary drive assembly is connected to the plunger, and the axial drive assembly is connected to the sliding shoe, and the detection method comprises: Controlling the rotary drive assembly to drive the plunger to rotate at a predetermined speed, wherein the predetermined speed is the rotation speed of the plunger during actual use; Controlling the axial drive assembly to drive the sliding shoe to move along a predetermined direction until the plunger and the sliding shoe are separated, wherein the predetermined direction is a direction on the axis of the sliding shoe away from the plunger; Calculating the pull-off force of the sliding shoe according to the driving current of the axial driving component; The device for detecting the pull-off force of the sliding shoe further comprises a stress sensor and / or a strain sensor, wherein the stress sensor and / or the strain sensor are arranged on the outer wall of the sliding shoe, and the axial drive assembly is controlled to drive the sliding shoe to move in a predetermined direction until the plunger and the sliding shoe are separated, comprising: controlling the axial drive assembly to drive the sliding shoe to move in a predetermined direction, and recording the measured value of the stress sensor and / or the measured value of the strain sensor; determining that the plunger and the sliding shoe are separated when the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged; and controlling the axial drive assembly to stop running; Controlling the axial drive assembly to drive the sliding shoe to move along a predetermined direction and recording the measured value of the stress sensor and / or the measured value of the strain sensor, including: increasing the drive current of the axial drive assembly at a predetermined rate until the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, and keeping the drive current of the axial drive assembly unchanged; The axial drive component includes an electromagnetic coil and a magnetic pull rod, the electromagnetic coil, the magnetic pull rod and the sliding shoe are coaxially installed, the magnetic pull rod is connected to the sliding shoe and is located between the electromagnetic coil and the sliding shoe, and the sliding shoe pull-off force is calculated according to the driving current of the axial drive component, including: substituting the driving current of the electromagnetic coil into F=nBIL to calculate the sliding shoe pull-off force, wherein n is the number of turns of the electromagnetic coil, B is the magnetic induction intensity of the electromagnetic coil, I is the driving current of the electromagnetic coil, and L is the length of the electromagnetic coil.

2. The method according to claim 1, characterized in that Before controlling the rotary drive assembly to drive the plunger to rotate at a predetermined speed, the method further includes: The angle between the axis of the plunger and the axis of the sliding shoe is adjusted to a predetermined angle, and the predetermined angle corresponds to the pull-off force of the sliding shoe.

3. The method according to claim 2, characterized in that The predetermined angle at least includes a limit angle, and the limit angle includes a first limit angle and a second limit angle. The first limit angle is the maximum angle when the axis of the plunger and the axis of the sliding shoe are not parallel, and the second limit angle is the angle when the axis of the plunger and the axis of the sliding shoe are parallel. The first limit angle and the second limit angle are both between 0° and 90°.

4. A device for detecting the pull-off force of a sliding shoe, characterized in that: The detection device of the sliding shoe pull-off force comprises a rotary drive assembly, a plunger, a sliding shoe and an axial drive assembly, wherein the plunger and the sliding shoe are hingedly connected, the rotary drive assembly is connected to the plunger, the axial drive assembly is connected to the sliding shoe, and the detection device comprises: A first control unit, used for controlling the rotation drive assembly to drive the plunger to rotate at a predetermined speed, wherein the predetermined speed is the rotation speed of the plunger during actual use; a second control unit, configured to control the axial drive assembly to drive the sliding shoe to move in a predetermined direction until the plunger and the sliding shoe are separated, wherein the predetermined direction is a direction on the axis of the sliding shoe away from the plunger; A calculation unit, used for calculating the pull-off force of the sliding shoe according to the driving current of the axial driving assembly; The detection device for the pull-off force of the sliding shoe further comprises a stress sensor and / or a strain sensor, wherein the stress sensor and / or the strain sensor are arranged on the outer wall of the sliding shoe, and the second control unit comprises a control module and a determination module, wherein the control module is used to control the axial drive assembly to drive the sliding shoe to move in a predetermined direction and record the measured value of the stress sensor and / or the measured value of the strain sensor; the determination module is used to determine that the plunger and the sliding shoe are separated when the measured value of the stress sensor and / or the measured value of the strain sensor remains unchanged; and control the axial drive assembly to stop running; The control module includes an adjustment submodule, and the adjustment submodule is used to increase the driving current of the axial driving assembly at a predetermined rate until the change rate of the measured value of the stress sensor and / or the measured value of the strain sensor is greater than the corresponding predetermined change rate, and the driving current of the axial driving assembly is kept unchanged; The axial drive assembly includes an electromagnetic coil and a magnetic pull rod, the electromagnetic coil, the magnetic pull rod and the sliding shoe are coaxially installed, the magnetic pull rod is connected to the sliding shoe and is located between the electromagnetic coil and the sliding shoe, the calculation unit includes a calculation module, the calculation module is used to substitute the driving current of the electromagnetic coil into F=nBIL to calculate the sliding shoe pull-off force, wherein n is the number of turns of the electromagnetic coil, B is the magnetic induction intensity of the electromagnetic coil, I is the driving current of the electromagnetic coil, and L is the length of the electromagnetic coil.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method of any one of claims 1 to 3.

6. A processor, characterized in that: The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 3 when running.

7. A system for detecting the pull-off force of a sliding shoe, characterized in that: include: A device for detecting a pull-off force of a sliding shoe, one or more processors, a memory, a display device, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a method for executing any one of claims 1 to 3.

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