Plunger shoe assembly inner profile measurement method, apparatus, device, and storage medium

Abstract

The application discloses a plunger slipper assembly inner contour measurement method, device, equipment and storage medium. The plunger slipper assembly inner contour measurement method fills liquid into the inner contour space of the plunger slipper assembly; the liquid in the inner contour space is discharged, the liquid discharge amount in the inner contour space and the pressure in the inner contour space are obtained, and the mapping relationship between the liquid discharge amount and the pressure is established; a first region and a second region in the mapping relationship are obtained, wherein the first region is used for representing the relationship between the liquid discharge amount and the pressure when the liquid in a part of the gap and the liquid in the ball head hole are discharged, and the second region is used for representing the relationship between the liquid discharge amount and the pressure when the liquid in another part of the gap is discharged; a coordinate system is established, and the inner contour of the packing pressure part is calculated according to the physical properties of the liquid, the first region and the second region. The plunger slipper assembly inner contour measurement method can nondestructively detect the inner contour of the packing pressure part of the plunger slipper assembly.

Description

Technical Field

[0001] This application relates to the field of plunger slipper assembly inner contour measurement technology, and in particular to a method, apparatus, equipment and storage medium for measuring the inner contour of a plunger slipper assembly. Background Technology

[0002] The plunger-slipper assembly is a key component for power transmission in the mechanical field. The plunger-slipper assembly includes a plunger and a slipper, one of which has a ball head, and the other has a compression portion. During the molding process of the plunger-slipper assembly, the compression portion covers the ball head.

[0003] The forming effect of the plunger slipper assembly affects the working performance and service life of the mechanical equipment. For the plunger slipper assembly formed by pressure molding, the inner and outer contours of the pressure part need to be within a preset reasonable range. However, since the pressure part wraps around the ball head, the inner contour shape of the pressure part is difficult to detect directly.

[0004] In the existing technology for inspecting the inner contour shape of the compression section, one or more plunger slipper assemblies from a batch of products are extracted and dissected along the axial direction. The inner contour surface after dissection is scanned to obtain the actual contour data and compare it with the standard contour range to determine whether the plunger slipper assembly meets the usage requirements. The judgment structure is used as the basis for judging the quality of the batch of products.

[0005] However, existing testing methods directly damage the component under test during the measurement process, rendering the tested products unusable and resulting in high measurement costs. Furthermore, the direct damage to the component during measurement limits testing to a small sample size, hindering comprehensive batch quality control and impeding precise product quality management. Therefore, developing a non-destructive testing method for the inner contour of the compression section of a plunger slipper assembly is an important research direction. Summary of the Invention

[0006] The purpose of this application is to at least solve the problem in the prior art that the inner contour of the compression section of the plunger slipper assembly cannot be detected non-destructively. This purpose is achieved through the following technical solution:

[0007] The first aspect of this application proposes a method for measuring the inner contour of a plunger slipper assembly, comprising:

[0008] The inner contour space of the plunger slipper assembly is filled with liquid, wherein the inner contour space includes the gap between the pressure part and the ball head, the ball head hole and the pressure hole;

[0009] The liquid in the inner contour space is discharged, the amount of liquid discharged in the inner contour space and the pressure in the inner contour space are obtained, and a mapping relationship between the amount of liquid discharged and the pressure is established.

[0010] Obtain a first region and a second region in the mapping relationship, wherein the first region is used to characterize the relationship between the liquid discharge volume and the pressure when a portion of the liquid in the gap and the liquid in the ball head orifice are discharged, and the second region is used to characterize the relationship between the liquid discharge volume and the pressure when another portion of the liquid in the gap is discharged;

[0011] Establish a coordinate system and calculate the inner contour of the compression section based on the physical properties of the liquid, the first region, and the second region.

[0012] The plunger slipper assembly inner contour measurement method of this application achieves non-destructive testing of the inner contour of the pressure-encasing section by injecting liquid into the inner contour space and discharging the liquid in a controlled manner, and by analyzing the mapping relationship between the liquid discharge volume and pressure. This method avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and enables testing of the entire batch of products, thereby improving product quality control capabilities.

[0013] In some embodiments, the step of obtaining the first region and the second region in the mapping relationship includes:

[0014] The relationship between the liquid discharge volume and the pressure change is obtained based on the mapping relationship;

[0015] In the mapping relationship, the region where the pressure change is less than a preset fluctuation threshold when the liquid discharge increases is identified and determined as the first region;

[0016] In the mapping relationship, the region where the pressure change shows an increasing trend when the liquid discharge increases is identified, and is determined as the second region.

[0017] In some embodiments, the step of establishing a coordinate system and calculating the inner contour of the compression portion based on the physical properties of the liquid, the first region, and the second region includes:

[0018] Establish a rectangular coordinate system;

[0019] Based on the pressure change Δp in the first region and the second region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate y of the inner contour of the pressure-encasing part is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration.

[0020] Based on the liquid discharge volume ΔV in the first region and the second region, the cross-sectional area S of the liquid discharge location is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height.

[0021] The abscissa x of the inner contour of the compression part is calculated based on the cross-sectional area S, and the coordinates (x, y) of each point on the inner contour are obtained.

[0022] In some embodiments, the step of establishing a rectangular coordinate system includes:

[0023] A rectangular coordinate system is established by setting the Y-axis with the center line of the ball head hole as a reference and setting the X-axis in a direction that is perpendicular to the center line of the ball head hole and passes through a preset reference point.

[0024] The step of calculating the abscissa x of the inner contour of the compression portion based on the cross-sectional area S includes:

[0025] The coordinate value x1 of the abscissa x of the inner contour of the compression part corresponding to the first region is calculated using the following formula:

[0026] S1=πx1 2 -πR 2 +πr 2

[0027] The x-coordinate value x2 of the inner contour of the compression part corresponding to the second region is calculated using the following formula:

[0028] S2=πx2 2

[0029] Wherein, S1 is the area value of the cross-sectional area S in the first region, S2 is the area value of the cross-sectional area S in the second region, π is pi, R is the diameter of the ball head at the liquid discharge position, and r is the diameter of the ball head hole.

[0030] In some embodiments, the plunger slipper assembly inner contour measurement method further includes:

[0031] Obtain the third region in the mapping relationship, wherein the third region is used to characterize the relationship between the liquid discharge amount and the pressure when the liquid in the pressure-filled orifice is discharged;

[0032] The height of the pressure-filling orifice is calculated based on the physical properties of the liquid and the third region.

[0033] In some embodiments, the step of obtaining the third region in the mapping relationship includes:

[0034] In the mapping relationship, the region where the pressure change is a fixed value when the liquid discharge increases is identified, and this region is determined as the third region.

[0035] In some embodiments, the step of calculating the height of the pressure-filling orifice based on the physical properties of the liquid and the third region includes:

[0036] Based on the pressure change Δp in the third region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate of the pressure-sealing hole is calculated based on the height change Δy.

[0037] A second aspect of this application discloses a plunger slipper assembly inner contour measuring device, comprising:

[0038] The liquid injection module is used to fill the inner contour space of the plunger slipper assembly with liquid, wherein the inner contour space includes the gap between the pressure part and the ball head, the ball head hole and the pressure hole;

[0039] The drainage module is used to drain the liquid in the inner contour space, and to obtain the amount of liquid drained from the inner contour space and the pressure in the inner contour space, and to establish a mapping relationship between the amount of liquid drained and the pressure.

[0040] The first acquisition module is used to acquire a first region and a second region in the mapping relationship, wherein the first region is used to characterize the relationship between the liquid discharge amount and the pressure when a portion of the liquid in the gap and the liquid in the ball head orifice are discharged, and the second region is used to characterize the relationship between the liquid discharge amount and the pressure when another portion of the liquid in the gap is discharged;

[0041] The first calculation module is used to establish a coordinate system and calculate the inner contour of the compression section based on the physical properties of the liquid, the first region, and the second region.

[0042] The plunger slipper assembly inner contour measuring device of this application achieves non-destructive testing of the inner contour of the pressure-encasing part by injecting liquid into the inner contour space and discharging the liquid in a controlled manner, and by analyzing the mapping relationship between the liquid discharge volume and pressure. This plunger slipper assembly inner contour measuring device avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and enables testing of the entire batch of products, thereby improving product quality control capabilities.

[0043] The third aspect of this application discloses a plunger slipper assembly inner contour measuring device, including a liquid discharge component, a sensor, a memory, and a processor. The liquid discharge component and the sensor are both configured to be disposed at one end of the inner contour space of the plunger slipper assembly for discharging liquid. The liquid discharge component and the sensor are both electrically connected to the processor. The memory stores a computer program. When the processor executes the computer program, it implements the steps of the plunger slipper assembly inner contour measuring method described in the first aspect above.

[0044] The plunger slipper assembly inner contour measuring device of this application achieves non-destructive testing of the inner contour of the pressure-encasing part by injecting liquid into the inner contour space and discharging the liquid through a liquid discharge component, acquiring the pressure value through a sensor, and analyzing the shape of the inner contour of the pressure-encasing part by combining the mapping relationship between the liquid discharge volume and pressure. This plunger slipper assembly inner contour measuring device avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and can inspect the entire batch of products, thereby improving product quality control capabilities.

[0045] The fourth aspect of this application provides a computer storage medium storing computer-readable instructions that, when read by one or more processors, cause the one or more processors to perform the steps of the plunger slipper assembly inner contour measurement method as described in the first aspect above.

[0046] The computer storage medium of this application, when its computer-readable instructions are read by one or more processors, causes one or more processors to execute the steps of the plunger slipper assembly inner contour measurement method. This method enables non-destructive testing of the inner contour of the pressure-sealing section by injecting and controlling the liquid into the inner contour space and analyzing the mapping relationship between the liquid discharge volume and pressure. Furthermore, it avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and allows for testing of the entire batch of products, thereby improving product quality control capabilities. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are only used to illustrate preferred embodiments and are not intended to limit this application.

[0048] Figure 1 This is a schematic diagram of the method for measuring the inner contour of the plunger slipper assembly according to an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of the inner contour measuring device of the plunger slipper assembly according to an embodiment of this application;

[0050] Figure 3 This is a schematic diagram of the inner contour measuring device for the plunger slipper assembly according to an embodiment of this application;

[0051] Figure 4 This is a mapping diagram of liquid discharge volume and pressure in an embodiment of this application;

[0052] Figure 5This is a schematic diagram of the plunger slide shoe according to an embodiment of this application.

[0053] Figure label:

[0054] 100. Plunger slipper assembly;

[0055] 10. Slipper; 11. Ball head; 12. Ball head hole;

[0056] 20. Plunger; 21. Pressing section; 22. Pressing hole;

[0057] 200. Plunger slipper assembly inner contour measuring equipment;

[0058] 30. Processor; 40. Liquid discharge component; 50. Sensor; 210. Liquid filling component;

[0059] 300. Plunger slipper assembly inner contour measuring device;

[0060] 60. Injection module; 70. Drainage module; 80. First acquisition module; 90. First calculation module. Detailed Implementation

[0061] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0062] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, and to make the above-mentioned objectives, features and advantages of the embodiments of this application more apparent and understandable, the technical solutions in the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0063] While exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the embodiments of the present application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the embodiments of the present application and to fully convey the scope of the embodiments of the present application to those skilled in the art.

[0064] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0065] The plunger-slipper assembly is a key component for power transmission in the mechanical field. The plunger-slipper assembly includes a plunger and a slipper, one of which has a ball head, and the other has a compression portion. During the molding process of the plunger-slipper assembly, the compression portion covers the ball head.

[0066] The forming effect of the plunger slipper assembly affects the working performance and service life of the mechanical equipment. For the plunger slipper assembly formed by pressure molding, the inner and outer contours of the pressure part need to be within a preset reasonable range. However, since the pressure part wraps around the ball head, the inner contour shape of the pressure part is difficult to detect directly.

[0067] In the existing technology for inspecting the inner contour shape of the compression section, one or more plunger slipper assemblies from a batch of products are extracted and dissected along the axial direction. The inner contour surface after dissection is scanned to obtain the actual contour data and compare it with the standard contour range to determine whether the plunger slipper assembly meets the usage requirements. The judgment structure is used as the basis for judging the quality of the batch of products.

[0068] However, existing testing methods directly damage the component under test during the measurement process, rendering the tested products unusable and resulting in high measurement costs. Furthermore, the direct damage to the component during measurement limits testing to a small sample size, hindering comprehensive batch quality control and impeding precise product quality management. Therefore, developing a non-destructive testing method for the inner contour of the compression section of a plunger slipper assembly is an important research direction.

[0069] In order to at least solve the problem that the inner contour of the compression portion of the plunger slipper assembly cannot be detected non-destructively in the prior art, the embodiments of this application propose a method for measuring the inner contour of the plunger slipper assembly, which can detect the inner contour of the compression portion of the plunger slipper assembly non-destructively.

[0070] The following describes a method for measuring the inner contour of a plunger slipper assembly according to an embodiment of this application, with reference to the accompanying drawings.

[0071] like Figure 3 As shown, the plunger slipper assembly inner contour measurement method of this application embodiment is used to measure the plunger slipper assembly 100. The plunger slipper assembly 100 includes a plunger 20 and a slipper 10. One of the plunger 20 and the slipper 10 includes a ball head 11 and a ball head hole 12, and the other of the plunger 20 and the slipper 10 includes a pressing part 21 and a pressing hole 22. The gap between the ball head 11 and the pressing part 21 communicates with the ball head hole 12, and the gap between the ball head 11 and the pressing part 21 also communicates with the pressing hole 22.

[0072] like Figure 1 As shown, the method for measuring the inner contour of the plunger slipper assembly according to an embodiment of this application includes:

[0073] S100. Fill the inner contour space of the plunger slipper assembly with liquid, wherein the inner contour space includes the gap between the pressure-filling part and the ball head, the ball head hole and the pressure-filling hole.

[0074] S200, Discharge the liquid in the inner contour space, obtain the liquid discharge volume and pressure in the inner contour space, and establish a mapping relationship between the liquid discharge volume and pressure.

[0075] S300. Obtain the first region and the second region in the mapping relationship, wherein the first region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in a part of the gap and the liquid in the ball head hole are discharged, and the second region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in another part of the gap is discharged.

[0076] S400. Establish a coordinate system and calculate the inner contour of the compression section based on the physical properties of the liquid, the first region, and the second region.

[0077] The specific steps are as follows:

[0078] S100. Fill the inner contour space of the plunger slipper assembly with liquid, wherein the inner contour space includes the gap between the pressure-filling part and the ball head, the ball head hole and the pressure-filling hole.

[0079] The liquid injection process can be achieved in several ways. For example, gravity injection can be used, placing the plunger slipper assembly below the liquid surface to allow the liquid to flow in naturally and fill all internal spaces. Alternatively, pump injection can be used, forcibly injecting liquid into the inner contour space until it is completely filled. During the injection process, an vent can be provided to ensure that air is completely expelled, preventing residual air bubbles from affecting measurement accuracy. As an example, the liquid can be water or oil.

[0080] By filling the inner contour space of the plunger slipper assembly with liquid, the inner contour of the compression section can be analyzed by the liquid drainage method in subsequent steps, thus providing a basis for subsequent steps.

[0081] S200, Discharge the liquid in the inner contour space, obtain the liquid discharge volume and pressure in the inner contour space, and establish a mapping relationship between the liquid discharge volume and pressure.

[0082] Liquid discharge can be carried out in a controlled manner, for example, by slowly discharging the liquid through an adjustable valve or pump. During the liquid discharge process, the volume of the discharged liquid can be monitored in real time using a high-precision flow meter or weighing sensor to obtain the liquid discharge rate.

[0083] During the liquid discharge process, a preset amount of liquid can be discharged at predetermined time intervals, for example, 2 ml of liquid can be discharged every 4 seconds. Those skilled in the art can reasonably set the interval time and the amount of liquid discharged each time according to requirements. For example, when higher measurement accuracy is required, the liquid volume discharged at one time and the interval time can be reduced; when higher measurement speed is required, the liquid volume discharged at one time and the discharge time can be increased. The liquid can also be discharged continuously during the discharge process.

[0084] When liquid is discharged from the inner contour space, liquid is expelled from the gap between the pressure-shrinking part and the ball head, the ball head orifice, and the pressure-shrinking orifice, resulting in a change in pressure response within the inner contour space. A pressure sensor can be used to measure the pressure within the inner contour space in real time. The real-time liquid discharge data and corresponding pressure data are recorded and plotted as a graph or stored as a data table, thus establishing a mapping relationship between liquid discharge volume and pressure. For example, the current pressure value can be recorded every time a certain volume of liquid is discharged, forming a series of data points. These data points can then be plotted as a graph or stored as a data table to establish a mapping relationship between liquid discharge volume and pressure.

[0085] During the process of establishing the mapping relationship, the data points can be further processed. For example, the data points can be fitted so that the relationship between liquid discharge and pressure can more accurately reflect the shape information of the inner contour space.

[0086] By draining the liquid from the inner contour space, obtaining the amount of liquid drained and the pressure within the inner contour space, and establishing a mapping relationship between the amount of liquid drained and the pressure, a foundation can be provided for subsequent analysis of the shape of the inner contour space.

[0087] S300. Obtain the first region and the second region in the mapping relationship, wherein the first region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in a part of the gap and the liquid in the ball head hole are discharged, and the second region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in another part of the gap is discharged.

[0088] By obtaining the first and second regions in the mapping relationship, the discharge behavior of different parts of the liquid can be distinguished, thereby enabling precise separation of the complex geometric features of the inner contour and avoiding data confusion.

[0089] In some embodiments, the step of obtaining the first region and the second region in the mapping relationship includes:

[0090] The relationship between liquid discharge volume and pressure change is obtained based on the mapping relationship;

[0091] In the mapping relationship, the region where the pressure change is less than the preset fluctuation threshold when the liquid discharge increases is identified and determined as the first region;

[0092] In the mapping relationship, the region where the pressure change tends to increase when the liquid discharge increases is identified and designated as the second region.

[0093] Combination Figure 4 and Figure 5 As shown, when liquid is discharged from region a, the relationship between liquid discharge volume and pressure corresponds to that of the first region; when liquid is discharged from region b, the relationship between liquid discharge volume and pressure corresponds to that of the second region; and when liquid is discharged from region c, the relationship between liquid discharge volume and pressure corresponds to that of the third region.

[0094] By establishing a mapping relationship between liquid discharge volume and pressure change, the rate or magnitude of pressure change with liquid discharge volume can be extracted from the original mapping data. This allows for a more sensitive reflection of the impact of subtle changes in the internal contour geometry on liquid discharge, thus providing a basis for region identification in subsequent steps. For example, the pressure change can be obtained by performing differential calculations on continuous pressure measurements to determine the pressure difference corresponding to adjacent increases in liquid discharge volume. Alternatively, the rate of pressure change with liquid discharge volume can be obtained by numerical differentiation or analytical differentiation following curve fitting of the mapping relationship between liquid discharge volume and pressure.

[0095] Combination Figure 3 , Figure 4 and Figure 5 As shown, when liquid is discharged from a portion of the gap between the pressure-shrinking part and the ball head, as well as the internal space of the ball head orifice, the internal space of the ball head orifice is approximately uniform, while the gap between the pressure-shrinking part and the ball head is non-uniform. The gap between the pressure-shrinking part and the ball head is smaller than the internal space of the ball head orifice. Therefore, when the liquid discharge volume increases, the pressure change is approximately constant, but there are slight fluctuations. These fluctuations could be an increasing trend, a decreasing trend, an alternating trend, or an irregular trend within a preset fluctuation threshold. Thus, the region where the pressure change is less than the preset fluctuation threshold when the liquid discharge volume increases is identified and designated as the first region.

[0096] The preset fluctuation threshold is a pre-defined allowable fluctuation range of pressure change based on the structural parameters of the plunger slipper assembly, the physical properties of the liquid, and the measurement accuracy requirements. The fluctuation mainly comes from the pressure change caused by the gap between the pressure-shrinking part and the ball head. Therefore, it can be determined by combining the reference value of the gap between the pressure-shrinking part and the ball head, the structural parameters of the plunger slipper assembly, the physical properties of the liquid, and the measurement accuracy requirements.

[0097] Combination Figure 3 , Figure 4 and Figure 5As shown, when the liquid is discharged from another gap between the pressure-reducing part and the ball head, the pressure change is a variable value when the liquid discharge volume increases, and it has an increasing trend. Therefore, the region where the pressure change shows an increasing trend when the liquid discharge volume increases is identified and determined as the second region.

[0098] The embodiments of this application can distinguish between the first region and the second region corresponding to different liquid discharge stages during the inner contour measurement of the plunger slipper assembly, thereby distinguishing the discharge behavior of different parts of the liquid, and thus accurately separating the complex geometric features of the inner contour, so as to process different set features separately and avoid data confusion.

[0099] S400. Establish a coordinate system and calculate the inner contour of the compression section based on the physical properties of the liquid, the first region, and the second region.

[0100] Establish a reference coordinate system to describe the geometry of the inner contour of the pressure-shrinking section. For example, a cylindrical coordinate system or a rectangular coordinate system can be established based on the structural characteristics of the plunger slipper assembly. Based on the known physical properties of the liquid (e.g., density and gravitational acceleration), and combined with the liquid discharge volume and pressure data obtained from the first and second regions, calculate the shape of the inner contour of the pressure-shrinking section using geometric modeling and numerical analysis methods. For example, based on the relationship between the liquid discharge volume and the cross-sectional area of ​​the inner contour space, as well as the relationship between pressure changes and height changes, the coordinates of each point on the inner contour of the pressure-shrinking section can be gradually derived through iterative approximation or numerical integration, thereby obtaining its complete geometric contour data.

[0101] In some embodiments, the step of establishing a coordinate system and calculating the inner contour of the compression section based on the physical properties of the liquid, a first region, and a second region includes:

[0102] Establish a rectangular coordinate system;

[0103] Based on the pressure change Δp in the first and second regions, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate y of the inner contour of the pressure-encasing part is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration.

[0104] Based on the liquid discharge volume ΔV in the first and second regions, the cross-sectional area S of the liquid discharge location is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height.

[0105] Calculate the abscissa x of the inner contour of the compression section based on the cross-sectional area S, and obtain the coordinates (x, y) of each point on the inner contour.

[0106] By establishing a Cartesian coordinate system, a unified and accurate spatial reference framework can be provided for subsequent quantification of the inner contour shape, thereby avoiding errors caused by inconsistent reference systems.

[0107] The liquid discharge position refers to the axial position of the liquid surface within the inner contour space after the liquid has been discharged. This position corresponds one-to-one with the previously calculated ordinate. For example, if the height coordinate of the liquid discharge position is y1, the cross-sectional area S is the cross-sectional area of ​​the inner contour space at height y1.

[0108] Based on the pressure change Δp between the first and second regions, the height change Δy is calculated using the formula Δp=ρgΔy. Then, the ordinate y of the inner contour of the pressure-encasing section is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration. This utilizes the principles of hydrostatics to directly correlate the pressure change during liquid discharge with the change in liquid level, thus accurately determining the vertical position of the inner contour. For example, for each pressure drop Δp, the corresponding liquid level height change Δy can be calculated using the known liquid density ρ and gravitational acceleration g. The height change Δy is then accumulated from the origin of the coordinate system to obtain the ordinate y of each point on the inner contour of the pressure-encasing section. As another example, the X-axis can be set with the bottom of the pressure-encasing section and the ball head as a reference to reduce the computational complexity of accumulating the ordinate y of each point on the inner contour of the pressure-encasing section.

[0109] Based on the liquid discharge volume ΔV in the first and second regions, the cross-sectional area S is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height. The lateral dimension characteristics of the inner contour at a specific height can be estimated by the volume of liquid that has been discharged.

[0110] The abscissa x of the inner contour of the compression section is calculated based on the cross-sectional area S, and the coordinates (x, y) of each point on the inner contour are obtained. This step transforms the previously calculated cross-sectional area S into a specific abscissa x, which, combined with the ordinate y, completely depicts the two-dimensional inner contour shape of the compression section.

[0111] The embodiments of this application can convert liquid discharge volume and pressure data into geometric coordinates of the inner contour of the pressure-sealing part, thereby providing a more accurate and efficient means for quality control of the plunger slipper assembly.

[0112] The shape of the inner contour can be reflected by the coordinates (x, y) of each point on the inner contour of the pressing part. In order to intuitively reflect the shape of the inner contour of the pressing part, the coordinates (x, y) of each point on the inner contour of the pressing part can be fitted to obtain the inner contour shape curve of the pressing part, so as to obtain the shape of the inner contour of the pressing part more intuitively and conveniently.

[0113] In some embodiments, the step of establishing a rectangular coordinate system includes:

[0114] A rectangular coordinate system is established by setting the Y-axis with the center line of the ball head hole as the reference and setting the X-axis in a direction that is perpendicular to the center line of the ball head hole and passes through a preset reference point.

[0115] The steps for calculating the abscissa x of the inner contour of the compression section based on the cross-sectional area S include:

[0116] The x-coordinate value x1 of the inner contour of the compression section corresponding to the first region is calculated using the following formula:

[0117] S1=πx1 2 -πR 2 +πr 2

[0118] The x-coordinate value x2 of the inner contour of the compression section corresponding to the second region is calculated using the following formula:

[0119] S2=πx2 2

[0120] Where S1 is the area value of the cross-sectional area S in the first region, S2 is the area value of the cross-sectional area S in the second region, π is pi, R is the diameter of the ball head at the liquid discharge position, and r is the diameter of the ball head hole.

[0121] The first region characterizes the relationship between the liquid discharge rate and pressure when liquid in a portion of the gap and liquid in the ball head orifice are discharged. S1 includes the area of ​​the gap between the compression section and the ball head and the area of ​​the ball head orifice. Therefore, S1 = πx1 2 -πR 2 +πr 2 The actual radius x1 of the inner contour of the compression section can be accurately deduced from the total cross-sectional area. The values ​​of R and r can be measured in advance before the compression molding of the plunger slipper assembly.

[0122] The second region is used to characterize the relationship between the amount of liquid discharged and the pressure when the liquid in the other gap is discharged. S2 includes the gap area between the compression part and the ball head. Therefore, S2=πx2² can accurately deduce the actual radius x2 of the inner contour of the compression part from the cross-sectional area.

[0123] The embodiments of this application can distinguish the discharge behavior of different parts of the liquid, thereby accurately separating the complex geometric features of the inner contour, making the measurement of the inner contour of the compression part more precise and accurate, thus enabling non-destructive quality monitoring of the product, effectively improving the precise control capability of product quality, and reducing measurement costs.

[0124] The plunger slipper assembly inner contour measurement method of this application achieves non-destructive testing of the inner contour of the pressure-encasing section by injecting liquid into the inner contour space and discharging the liquid in a controlled manner, and by analyzing the mapping relationship between the liquid discharge volume and pressure. This method avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and enables testing of the entire batch of products, thereby improving product quality control capabilities.

[0125] In some embodiments, the method for measuring the inner contour of the plunger slipper assembly further includes:

[0126] Obtain the third region in the mapping relationship, where the third region is used to characterize the relationship between the liquid discharge rate and pressure when the liquid in the pressure-filled orifice is discharged;

[0127] The height of the pressure-filling orifice is calculated based on the physical properties of the liquid and the third region.

[0128] Obtaining the third region in the mapping relationship allows for the identification and separation of specific data segments corresponding to the liquid discharge process inside the pressure-sealing orifice from the mapping relationship between liquid discharge rate and pressure. For example, this can be identified by analyzing the pressure change rate or its stability. Alternatively, other regions can be identified as the third region after the first and second regions.

[0129] In this embodiment of the application, when measuring the inner contour of the plunger slipper assembly, the pressure-sealing orifice is further included in the measurement range. By identifying and utilizing the third region in the mapping relationship, the pressure change law when the liquid inside the pressure-sealing orifice is discharged can be accurately characterized, and the height of the pressure-sealing orifice can be accurately calculated based on the physical properties of the liquid, thereby making the measurement of the inner contour of the plunger slipper assembly more comprehensive and complete.

[0130] like Figure 5 As shown, for example, when establishing a rectangular coordinate system, the X-axis is established with the bottom of the pressure hole as the reference. By calculating the height of the pressure hole, the inner contour of the plunger slipper assembly can be measured more comprehensively and completely.

[0131] In some embodiments, the step of obtaining the third region in the mapping relationship includes:

[0132] In the mapping relationship, the region where the pressure change remains constant when the liquid discharge increases is identified and designated as the third region.

[0133] As an example, first-order differencing can be performed on the pressure data in the mapping relationship to calculate the pressure change between adjacent data points. Then, it can be checked whether the pressure change remains consistent within a preset tolerance range. When multiple consecutive pressure changes fall within this tolerance range, the corresponding liquid discharge range can be identified as a region where the pressure change is constant. As another example, piecewise linear fitting can be performed on the mapping relationship curve to find line segments where the slope (i.e., the ratio of pressure change to liquid discharge) is approximately constant. The liquid discharge range corresponding to this line segment with a constant slope is identified as a region where the pressure change is constant.

[0134] Understandably, when considering whether pressure changes are constant, errors should be fully accounted for, rather than mechanically focusing on whether the pressure changes are equal. For example, a threshold range for pressure changes can be set; when the pressure changes of multiple consecutive data points fall within this range, a constant value region is considered to have been found.

[0135] This application provides a specific method for third region identification, which can improve the non-destructive testing effect and data accuracy of the plunger slipper assembly inner contour measurement method, making the measurement of the pressure hole height more reliable.

[0136] In some embodiments, the step of calculating the height of the pressure-filling orifice based on the physical properties of the liquid and the third region includes:

[0137] Based on the pressure change Δp in the third region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate of the pressure-filled hole is calculated based on the height change Δy.

[0138] The height change Δy is calculated based on the formula Δp = ρgΔy, which utilizes the fundamental principles of fluid statics to convert pressure changes into height changes. Here, ρ is the density of the liquid, and g is the acceleration due to gravity. This formula establishes a quantitative relationship between pressure changes and changes in liquid column height. In practice, the density ρ of the liquid used can be accurately measured beforehand, and the standard acceleration due to gravity g can be used. Then, the pressure change Δp obtained from the third region is substituted into the formula to directly calculate the height change Δy. Alternatively, a calibration experiment can be conducted using a liquid column with known height changes to verify or correct the product of ρg, thereby ensuring the accuracy of the height change Δy calculated from the pressure change.

[0139] Calculating the ordinate of the pressure hole based on the height change Δy means using the calculated height change Δy to determine the specific vertical position of the pressure hole. The ordinate represents the vertical position of the pressure hole in the measurement system. By accumulating or referencing the height change Δy of a reference point, the geometric dimensions and positional information of the pressure hole can be accurately determined.

[0140] The embodiments of this application improve measurement accuracy and operability by refining the specific steps for calculating the height of the compression hole, making the height calculation more specific and executable, enhancing the practicality of the non-destructive testing method, thereby enabling more accurate acquisition of the height information of the compression hole and providing reliable data for the quality assessment of the plunger slipper assembly.

[0141] As an example, the radius of the compression hole can be measured in advance before the plunger slipper assembly is compression molded, thereby enabling the abscissa of the compression hole to be obtained based on its radius.

[0142] As another example, based on the liquid discharge volume ΔV in the third region, the cross-sectional area S is calculated using the formula ΔV=S*Δy. S3 is then obtained from the cross-sectional area S, where S3 is the area of ​​the cross-sectional area S in the third region. Using S3, the lateral dimension of the inner contour at a specific height can be estimated based on the discharged liquid volume, and this is done using the formula S3=πx3. 2 Calculate the x-coordinate of the pressure hole (x3).

[0143] The shape of the pressure hole can be reflected by the coordinates of each point on the pressure hole. In order to reflect the shape of the pressure hole more intuitively, the coordinates of each point on the pressure hole can be fitted to obtain the contour curve of the pressure hole, so as to obtain the inner contour shape of the pressure hole more intuitively and conveniently.

[0144] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0145] Based on the same concept, this application also provides a plunger slipper assembly inner contour measuring device for implementing the plunger slipper assembly inner contour measuring method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more plunger slipper assembly inner contour measuring device embodiments provided below can be found in the limitations of the plunger slipper assembly inner contour measuring method described above, and will not be repeated here.

[0146] like Figure 2As shown, the plunger slipper assembly inner contour measuring device 300 of this application includes:

[0147] The liquid injection module 60 is used to fill the inner contour space of the plunger slipper assembly with liquid, wherein the inner contour space includes the gap between the pressure part and the ball head, the ball head hole and the pressure hole;

[0148] The drainage module 70 is used to drain the liquid in the inner contour space, and to obtain the liquid discharge volume and pressure in the inner contour space, and to establish a mapping relationship between the liquid discharge volume and pressure.

[0149] The first acquisition module 80 is used to acquire the first region and the second region in the mapping relationship. The first region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in a part of the gap and the liquid in the ball head hole are discharged. The second region is used to characterize the relationship between the liquid discharge volume and pressure when the liquid in another part of the gap is discharged.

[0150] The first calculation module 90 is used to establish a coordinate system and calculate the inner contour of the compression section based on the physical properties of the liquid, the first region, and the second region.

[0151] The plunger slipper assembly inner contour measuring device 300 of this application embodiment achieves non-destructive testing of the inner contour of the pressure-encasing part by injecting liquid into the inner contour space and discharging the liquid in a controlled manner, and by analyzing the mapping relationship between the liquid discharge volume and pressure. The plunger slipper assembly inner contour measuring device 300 of this application can avoid damage to the plunger slipper assembly, significantly reduce measurement costs, and can inspect the entire batch of products, thereby improving product quality control capabilities.

[0152] In some embodiments, the first acquisition module 80 is further configured to:

[0153] The relationship between liquid discharge volume and pressure change is obtained based on the mapping relationship;

[0154] In the mapping relationship, the region where the pressure change is less than the preset fluctuation threshold when the liquid discharge increases is identified and determined as the first region;

[0155] In the mapping relationship, the region where the pressure change tends to increase when the liquid discharge increases is identified and designated as the second region.

[0156] In some embodiments, the first computing module 90 is further configured to:

[0157] Establish a rectangular coordinate system;

[0158] Based on the pressure change Δp in the first and second regions, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate y of the inner contour of the pressure-encasing part is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration.

[0159] Based on the liquid discharge volume ΔV in the first and second regions, the cross-sectional area S of the liquid discharge location is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height.

[0160] Calculate the abscissa x of the inner contour of the compression section based on the cross-sectional area S, and obtain the coordinates (x, y) of each point on the inner contour.

[0161] In some embodiments, the first computing module 90 is further configured to:

[0162] The steps to establish a rectangular coordinate system include:

[0163] A rectangular coordinate system is established by setting the Y-axis with the center line of the ball head hole as the reference and setting the X-axis in a direction that is perpendicular to the center line of the ball head hole and passes through a preset reference point.

[0164] The steps for calculating the abscissa x of the inner contour of the compression section based on the cross-sectional area S include:

[0165] The x-coordinate value x1 of the inner contour of the compression section corresponding to the first region is calculated using the following formula:

[0166] S1=πx1 2 -πR 2 +πr 2

[0167] The x-coordinate value x2 of the inner contour of the compression section corresponding to the second region is calculated using the following formula:

[0168] S2=πx2 2

[0169] Where S1 is the area value of the cross-sectional area S in the first region, S2 is the area value of the cross-sectional area S in the second region, π is pi, R is the diameter of the ball head at the liquid discharge position, and r is the diameter of the ball head hole.

[0170] In some embodiments, the plunger slipper assembly inner contour measuring device 300 further includes:

[0171] The second acquisition module is used to acquire the third region in the mapping relationship, wherein the third region is used to characterize the relationship between the liquid discharge volume and the pressure when the liquid in the pressure-filled orifice is discharged.

[0172] The second calculation module is used to calculate the height of the pressure-filling orifice based on the physical properties of the liquid and the third region.

[0173] In some embodiments, the second acquisition module is further configured to:

[0174] In the mapping relationship, the region where the pressure change remains constant when the liquid discharge increases is identified and designated as the third region.

[0175] In some embodiments, the second computing module is further configured to:

[0176] Based on the pressure change Δp in the third region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate of the pressure-filled hole is calculated based on the height change Δy.

[0177] This application also proposes a plunger slipper assembly inner contour measuring device 200. The plunger slipper assembly inner contour measuring device 200 of this application is described below with reference to the accompanying drawings.

[0178] like Figure 3 As shown, the plunger slipper assembly inner contour measuring device 200 of this application embodiment includes a liquid discharge component 40, a sensor 50, a memory, and a processor 30. The liquid discharge component 40 and the sensor 50 are both configured to be disposed at the end for discharging liquid in the inner contour space of the plunger slipper assembly 100. The liquid discharge component 40 and the sensor 50 are both electrically connected to the processor 30. The memory stores a computer program. When the processor 30 executes the computer program, it implements the steps of the plunger slipper assembly inner contour measuring method as described in the above embodiment.

[0179] Liquid discharge component 40 is used to allow controlled discharge of liquid from the inner contour space. As an example, liquid discharge component 40 can be a pump or a valve. Sensor 50 is used to acquire pressure changes in the liquid within the inner contour space. As an example, sensor 50 can be a pressure sensor.

[0180] The plunger slipper assembly inner contour measuring device 200 of this application embodiment injects liquid into the inner contour space and discharges the liquid through the liquid discharge component 40. The pressure value is acquired by the sensor 50, and the shape of the inner contour of the pressure-encasing part is analyzed by combining the mapping relationship between the liquid discharge volume and pressure, thus achieving non-destructive testing of the inner contour of the pressure-encasing part. The plunger slipper assembly inner contour measuring device 200 of this application can avoid damage to the plunger slipper assembly, significantly reduce measurement costs, and can inspect the entire batch of products, thereby improving product quality control capabilities.

[0181] like Figure 3As shown, in some embodiments, the plunger slipper assembly inner contour measuring device 200 further includes a liquid filling component 210, which is configured to be located at one end of the inner contour space for discharging liquid, for adding liquid into the inner contour space, so as to reduce the difficulty of injecting liquid into the inner contour space.

[0182] As an example, the filling component 210 can be a pump or a valve.

[0183] The embodiments of this application also propose a computer storage medium, which is described below.

[0184] The computer storage medium of this application embodiment stores computer-readable instructions. When the computer-readable instructions are read by one or more processors, the one or more processors cause the one or more processors to perform the steps of the plunger slipper assembly inner contour measurement method as described in the above embodiment.

[0185] The computer storage medium of this application embodiment, when its computer-readable instructions are read by one or more processors, causes the one or more processors to execute the steps of the plunger slipper assembly inner contour measurement method. This method enables non-destructive testing of the inner contour of the pressure-sealing section by injecting and controlling the liquid into the inner contour space and analyzing the mapping relationship between the liquid discharge volume and pressure. Furthermore, it avoids damage to the plunger slipper assembly, significantly reduces measurement costs, and allows for testing of the entire batch of products, thereby improving product quality control capabilities.

[0186] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), and read-only memory (ROM). Erasable Programmable Read-Only Memory (EPROM) Only memory (or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM, Compact Disc Read-Only Memory). (Only Memory). Furthermore, the computer-readable storage medium can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0187] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0188] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0189] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the apparatus embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0190] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0191] For the purposes of this specification, a computer-readable medium can be any means that can contain, store, communicate, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0192] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for measuring the inner contour of a plunger slipper assembly, characterized in that, include: The inner contour space of the plunger slipper assembly is filled with liquid, wherein the inner contour space includes the gap between the pressure part and the ball head, the ball head hole and the pressure hole; The liquid in the inner contour space is discharged, the amount of liquid discharged in the inner contour space and the pressure in the inner contour space are obtained, and a mapping relationship between the amount of liquid discharged and the pressure is established. The relationship between the liquid discharge volume and the pressure change is obtained based on the mapping relationship; In the mapping relationship, the region where the pressure change is less than a preset fluctuation threshold when the liquid discharge increases is identified and determined as the first region; In the mapping relationship, the region where the pressure change shows an increasing trend when the liquid discharge volume increases is identified and determined as the second region. The first region is used to characterize the relationship between the liquid discharge volume and the pressure when a portion of the liquid in the gap and the liquid in the ball head orifice are discharged. The second region is used to characterize the relationship between the liquid discharge volume and the pressure when another portion of the liquid in the gap is discharged. A rectangular coordinate system is established by setting the Y-axis with the center line of the ball head hole as a reference and setting the X-axis in a direction that is perpendicular to the center line of the ball head hole and passes through a preset reference point. Based on the pressure change Δp in the first region and the second region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate y of the inner contour of the pressure-encasing part is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration. Based on the liquid discharge volume ΔV in the first region and the second region, the cross-sectional area S of the liquid discharge location is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height. The coordinate value x1 of the abscissa x of the inner contour of the compression part corresponding to the first region is calculated using the following formula: S1=πx1 2 -πR 2 +πr 2 The x-coordinate value x2 of the inner contour of the compression part corresponding to the second region is calculated using the following formula: S2=πx2 2 Wherein, S1 is the area value of the cross-sectional area S in the first region, S2 is the area value of the cross-sectional area S in the second region, π is pi, R is the diameter of the ball head at the liquid discharge position, r is the diameter of the ball head hole, and the coordinates (x, y) of each point on the inner contour are obtained. In the mapping relationship, the region where the pressure change is a fixed value when the liquid discharge volume increases is identified and determined as the third region, wherein the third region is used to characterize the relationship between the liquid discharge volume and the pressure when the liquid in the pressure-sealing orifice is discharged; Based on the pressure change Δp in the third region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate of the pressure-sealing hole is calculated based on the height change Δy.

2. A device for measuring the inner contour of a plunger slipper assembly, characterized in that, include: The liquid injection module is used to fill the inner contour space of the plunger slipper assembly with liquid, wherein the inner contour space includes the gap between the pressure part and the ball head, the ball head hole and the pressure hole; The drainage module is used to drain the liquid in the inner contour space, and to obtain the amount of liquid drained from the inner contour space and the pressure in the inner contour space, and to establish a mapping relationship between the amount of liquid drained and the pressure. The first acquisition module is used to acquire the relationship between the liquid discharge volume and the pressure change based on the mapping relationship; in the mapping relationship, it identifies the region where the pressure change is less than a preset fluctuation threshold when the liquid discharge volume increases, and determines it as the first region; in the mapping relationship, it identifies the region where the pressure change shows an increasing trend when the liquid discharge volume increases, and determines it as the second region, wherein the first region is used to characterize the relationship between the liquid discharge volume and the pressure when a portion of the liquid in the gap and the liquid in the ball head orifice are discharged, and the second region is used to characterize the relationship between the liquid discharge volume and the pressure when another portion of the liquid in the gap is discharged; The first calculation module is used to set the Y-axis with the center line of the ball head hole as a reference, and set the X-axis in a direction that is perpendicular to the center line of the ball head hole and passes through a preset reference point, thereby establishing a rectangular coordinate system. Based on the pressure change Δp in the first region and the second region, the height change Δy is calculated using the formula Δp=ρgΔy, and the ordinate y of the inner contour of the pressure-encasing part is calculated based on the height change Δy, where ρ is the liquid density and g is the gravitational acceleration. Based on the liquid discharge volume ΔV in the first region and the second region, the cross-sectional area S of the liquid discharge location is calculated using the formula ΔV=S*Δy, where the cross-sectional area S is the cross-sectional area of ​​the inner contour space at the corresponding height. The coordinate value x1 of the abscissa x of the inner contour of the compression part corresponding to the first region is calculated using the following formula: S1=πx1 2 -πR 2 +πr 2 The x-coordinate value x2 of the inner contour of the compression part corresponding to the second region is calculated using the following formula: S2=πx2 2 Wherein, S1 is the area value of the cross-sectional area S in the first region, S2 is the area value of the cross-sectional area S in the second region, π is pi, R is the diameter of the ball head at the liquid discharge position, r is the diameter of the ball head hole, and the coordinates (x, y) of each point on the inner contour are obtained. The second acquisition module is used to identify, in the mapping relationship, a region in which the pressure change is a fixed value when the liquid discharge volume increases, and determine it as a third region, wherein the third region is used to characterize the relationship between the liquid discharge volume and the pressure when the liquid in the pressure-sealing orifice is discharged; The second calculation module is used to calculate the height change Δy based on the pressure change Δp in the third region using the formula Δp=ρgΔy, and to calculate the ordinate of the pressure-sealing hole based on the height change Δy.

3. A device for measuring the inner contour of a plunger slipper assembly, characterized in that, The device includes a liquid discharge component, a sensor, a memory, and a processor. The liquid discharge component and the sensor are both configured to be located at one end of the inner contour space of the plunger slipper assembly for discharging liquid. The liquid discharge component and the sensor are both electrically connected to the processor. The memory stores a computer program. When the processor executes the computer program, it implements the steps of the plunger slipper assembly inner contour measurement method according to claim 1.

4. A computer storage medium, characterized in that, The computer storage medium stores computer-readable instructions that, when read by one or more processors, cause one or more processors to perform the steps of the plunger slipper assembly inner contour measurement method as described in claim 1.

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