Plunger pump stirring loss measuring device and method with reciprocating telescopic plunger-sliding shoe assembly

Abstract

The invention provides a plunger pump stirring loss measuring device and method with a plunger-sliding shoe assembly stretching and retracting in a reciprocating mode. The plunger pump stirring loss measuring device comprises a reciprocating conversion module and a stirring loss measuring module. The reciprocating conversion module is used for achieving reciprocating telescopic motion of the integrated plunger-sliding shoe assembly and comprises a right-angle bent rod, a push-pull disc, a supporting frame and a base. And the stirring loss measuring module is used for measuring, calculating, recording and displaying the stirring loss of the plunger pump. And under the state that an oil stirring area of the stirring loss measurement module is filled with hydraulic oil and the state that the hydraulic oil is emptied, the torque borne by the integrated cylinder-main shaft is measured respectively, and the difference between the two measurement results is calculated to obtain the stirring loss of the plunger pump. According to the invention, the phenomenon of'pump burning 'of the dry type shell is avoided by stripping mechanical loss generated by a friction pair of the rotating assembly, the quasi-real working condition of reciprocating telescopic motion of the plunger-sliding shoe assembly is fully considered, and accurate measurement of the stirring loss is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of axial piston pumps, and particularly to a device and method for measuring the stirring loss of a piston-slider assembly that reciprocates telescopically in an axial piston pump. Background Art

[0002] The axial piston pump is a core power component in aerospace hydraulic transmission and control systems. To meet the increasingly demanding performance requirements of modern spacecraft and aircraft engines, axial piston pumps are continuously evolving towards higher speeds and pressures. The interior of the axial piston pump housing is filled with hydraulic oil, and the oil stirring motion of the rotating components generates significant stirring losses, including viscous resistance losses caused by the rotation of the cylinder block and flow-around resistance losses caused by the piston-slider assembly stirring the fluid. Stirring losses not only reduce the operating efficiency of the piston pump but also disrupt the stability of the thermal balance system of the axial piston pump, severely restricting the service life of the axial piston pump under high-speed and high-pressure operating conditions. Therefore, accurately measuring and analyzing the stirring loss characteristics of axial piston pumps is of great significance for optimizing the design of high-speed and high-pressure axial piston pumps and improving their service performance.

[0003] The internal structure of the axial piston pump is complex, with a large number of components. Various types of kinematic pairs are closely coupled and interact with each other. In addition to stirring losses, there are also volumetric losses caused by leakage and mechanical losses generated by friction between various components, which increases the difficulty of measuring the stirring loss characteristics of axial piston pumps. The existing stirring loss measurement device (a device for testing the stirring loss of high-speed rotating parts of an axial piston pump / motor, ZL105201814B) adopts an integrated design of the cylinder block and the main shaft, fixes the axial position of the piston-slider assembly to avoid direct contact between the bottom of the slider and the swash plate, measures the main shaft torque respectively in a wet housing filled with oil and a dry housing without oil, and calculates the stirring loss of the axial piston pump through the torque difference. Although the mechanical losses generated by the friction of the rotating components are separated to avoid the "pump burning" phenomenon under the dry housing, it cannot reflect the flow field disturbance effect caused by the reciprocating telescopic motion of the piston-slider assembly under actual working conditions, resulting in a deviation in the evaluation of the stirring loss characteristics. Another stirring loss experimental device (a device for testing the stirring loss of internal rotating components of an axial piston pump or motor, ZL113685343B) adopts a double swash plate structure design, and drives the piston-slider assembly to reciprocate in the cylinder block through the supporting force generated by the contact between the slider and the swash plate. Although it can simulate the influence of the reciprocating motion of the piston-slider assembly on the stirring loss characteristics under actual working conditions, due to the retention of the slider pair, the mechanical losses generated by the friction between the slider and the swash plate cannot be completely eliminated. It can neither accurately measure the stirring loss nor cause the "pump burning" phenomenon during long-term measurement in the dry housing.

[0004] Therefore, in order to accurately measure the stirring loss characteristics of an axial piston pump, the designed stirring loss measurement device should not only effectively isolate the friction pairs of the rotating components, but also accurately simulate the actual working conditions of the reciprocating telescopic motion of the plunger - slipper assembly. Summary of the Invention

[0005] The object of the present invention is to propose a plunger pump stirring loss measurement device and method for the reciprocating telescopic motion of the plunger - slipper assembly in view of the deficiencies of the existing measurement devices. By stripping the mechanical losses generated by the friction pairs of the rotating components, the phenomenon of "pump burning" in the dry housing is avoided, and the quasi - real working conditions of the reciprocating telescopic motion of the plunger - slipper assembly are fully considered, realizing the accurate measurement of the stirring loss.

[0006] The technical solution adopted by the present invention is: a plunger pump stirring loss measurement device for the reciprocating telescopic motion of the plunger - slipper assembly, which device includes a reciprocating conversion module and a stirring loss measurement module;

[0007] The reciprocating conversion module is used to realize the reciprocating telescopic motion of the integrated plunger - slipper assembly, and includes a right - angled bent rod, a push - pull disc, a support frame and a base;

[0008] The push - pull disc is provided with a support frame mounting hole and a right - angled bent rod push - pull groove. The support frame mounting hole cooperates with the support frame, and the support frame and the base are fixedly connected; the right - angled bent rod push - pull groove penetrates through the push - pull disc, a guide rail is arranged in the right - angled bent rod push - pull groove, a sleeve is embedded in the guide rail in the right - angled bent rod push - pull groove, the inner wall of the right - angled bent rod push - pull groove cooperates with the outer wall of the sleeve, and the right - angled bent rod cooperates with the inner wall of the sleeve; the shape of the right - angled bent rod push - pull groove is designed according to the actual motion trajectory of the plunger - slipper assembly of the axial piston pump;

[0009] The stirring loss measurement module is used to measure, calculate, record and display the stirring loss of the plunger pump, and includes an integrated cylinder - main shaft, an integrated plunger - slipper, a swash plate, a housing, a torque sensor, a driving motor and a data acquisition card;

[0010] The integrated cylinder block - main shaft is evenly distributed with cylinder holes along the circumference of the cylinder block for installing the integrated plunger - slipper; through - holes for right - angled bent rods are evenly distributed along the circumference of the bottom end face of the cylinder block and are matched with the right - angled bent rods; an axial counterbore is provided on the plunger part of the integrated plunger - slipper, and the right - angled bent rod is fixedly inserted into the counterbore; one end of the housing close to the drive motor is matched with the swash plate, and the other end of the housing far from the drive motor is matched with the integrated cylinder block - main shaft; a skeleton oil seal is installed between the housing and the integrated cylinder block - main shaft; the integrated cylinder block - main shaft passes through the swash plate and is connected to the output end of the drive motor through a torque sensor; the sealed area formed by the housing, the integrated cylinder block - main shaft, the integrated plunger - slipper, the swash plate and the skeleton oil seal is the oil - stirring area of the stirring loss measurement module; the data acquisition card collects the voltage signals of the torque sensor when the oil - stirring area is filled with hydraulic oil and when the hydraulic oil is exhausted respectively and calculates the stirring loss.

[0011] Further, a coordinate system is established at the center of the push - pull disc. The push - pull groove of the right - angled bent rod restricts the push - pull trajectory of the right - angled bent rod to the following relationship:

[0012] ;

[0013] wherein, represents the position coordinates of the center of the cross - section of the right - angled bent rod relative to the center of the push - pull disc, reflects the projection of the circumferential rotational motion trajectory of the right - angled bent rod along with the integrated plunger - slipper on the horizontal plane, reflects the projection of the axial reciprocating telescopic motion trajectory of the right - angled bent rod along with the integrated plunger - slipper on the horizontal plane, β represents the inclination angle of the swash plate, and R represents the distribution circle radius of the integrated plunger - slipper.

[0014] Further, the right - angled bent rod includes a horizontal section and a vertical section. The horizontal section of the right - angled bent rod is matched with the integrated cylinder block - main shaft, and the vertical section of the right - angled bent rod is matched with the sleeve in the push - pull groove of the right - angled bent rod of the push - pull disc.

[0015] Further, the depth of the cylinder hole of the integrated cylinder block - main shaft is greater than the length of the integrated plunger - slipper, but the cylinder hole does not penetrate the integrated cylinder block - main shaft.

[0016] Further, the axis of the cylinder hole is located on the distribution circle of the integrated plunger - slipper.

[0017] Further, an O - ring seal is installed between the through - hole of the right - angled bent rod and the right - angled bent rod.

[0018] Further, when the oil stirring area is filled with hydraulic oil and emptied of hydraulic oil, the voltage signal of the torque sensor is collected through a data acquisition card to calculate the stirring loss of the plunger pump.

[0019] Further, a gap of 3 mm - 5 mm is provided between the bottom end face of the slipper of the integrated plunger-slipper and the end face of the swash plate.

[0020] Further, a gap of 1 mm is provided between the surface of the plunger of the integrated plunger-slipper and the inner wall of the cylinder bore.

[0021] On the other hand, the present invention also provides a method for measuring the stirring loss of a plunger pump based on the reciprocating expansion and contraction of a plunger-slipper assembly. The method includes the following steps:

[0022] Step 1: Fill the oil stirring area of the plunger pump stirring loss measuring device with hydraulic oil, and fill the non-oil stirring area with oil to ensure lubrication; start the driving motor and set the rotation speed. After the output rotation speed is stable, start the data acquisition card, collect multiple sets of voltage values representing the torque received by the integrated cylinder block-main shaft, upload them to the host computer for storage, and then turn off the driving motor;

[0023] Step 2: Drain all the hydraulic oil in the oil stirring area, and fill the non-oil stirring area with oil to ensure lubrication; start the driving motor and set the same rotation speed as in Step 1; when the output rotation speed is stable, start the data acquisition card, collect the same number of sets of voltage values representing the torque received by the integrated cylinder block-main shaft as in Step 1, upload them to the host computer for storage, and then turn off the driving motor;

[0024] Step 3: Take the average value of the multiple sets of voltage values in Step 1 and Step 2 respectively and then take the difference to obtain the stirring loss of the plunger pump at the rotation speed set in Step 1;

[0025] Step 4: Change the output rotation speed of the driving motor set in Step 1, repeat Steps 1 to 3, and obtain the stirring loss characteristic diagram of the plunger pump stirring loss-rotation speed.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) The present invention separates the mechanical losses generated by the three major friction pairs of the plunger pump, avoiding the "pump burning" phenomenon under a dry housing. The present invention removes the valve plate, avoiding the influence of the mechanical loss generated by the friction of the valve plate pair on the measurement result of the stirring loss; a gap is provided between the plunger part of the integrated plunger-slipper and the inner wall of the cylinder bore, avoiding the influence of the mechanical loss generated by the friction of the plunger pair on the measurement result of the stirring loss; the bottom end face of the slipper of the integrated plunger-slipper does not contact the end face of the swash plate, avoiding the influence of the mechanical loss generated by the friction of the slipper pair on the measurement result of the stirring loss;

[0028] (2) The present invention takes into account the quasi-real working conditions of the reciprocating telescopic motion of the plunger-slider assembly. A reciprocating conversion module is provided. According to the actual motion trajectory of the plunger-slider assembly of the axial piston pump, a push-pull disc and a push-pull groove of a right-angle bent rod are designed. Constrained by the push-pull disc and the push-pull groove of the right-angle bent rod, while the right-angle bent rod makes a circumferential rotational motion along with the integrated plunger-slider, it also performs an axial reciprocating telescopic motion along the axial direction according to the push-pull trajectory of the right-angle bent rod given by the center line of the push-pull groove of the right-angle bent rod, thereby driving the integrated plunger-slider to perform an axial reciprocating telescopic motion in the cylinder bore. Description of the Drawings

[0029] Figure 1 is the overall framework diagram of the plunger pump stirring loss measuring device for the reciprocating telescopic motion of the plunger-slider assembly in the present invention;

[0030] Figure 2 is the internal structure diagram of the plunger pump stirring loss measuring device for the reciprocating telescopic motion of the plunger-slider assembly in the present invention;

[0031] Figure 3 is the bottom end face diagram of the cylinder block of the integrated cylinder block-main shaft in the present invention;

[0032] Figure 4 is the installation method diagram of the integrated plunger-slider in the present invention;

[0033] Figure 5 is the structure diagram of the push-pull disc in the present invention;

[0034] Figure 6 is the installation method diagram of the right-angle bent rod on the push-pull disc in the present invention.

[0035] Description of the Drawings: First coupling 1, torque sensor 2, second coupling 3, drive motor 4, data acquisition card 5, host computer 6, base 7, support frame 8, push-pull disc 9, right-angle bent rod 10, skeleton oil seal 11, oil stirring area 12, integrated cylinder block-main shaft 13, swash plate 14, integrated plunger-slider 15, housing 16, through hole of right-angle bent rod 17, O-ring 18, cylinder bore 19, push-pull trajectory of right-angle bent rod 20, installation hole of support frame 21, push-pull groove of right-angle bent rod 22, sleeve 23. Detailed Embodiment

[0036] To make the technical solutions, structural features, implementation purposes, and technical effects described in the present invention clearer, the present invention will be described in detail below in combination with specific embodiments and the drawings of the specification. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0037] This embodiment proposes a plunger pump stirring loss measuring device for the reciprocating telescopic motion of the plunger-slider assembly, and its overall framework refers to Figure 1, the internal structure is referred to Figure 2 , including a reciprocating conversion module for realizing the reciprocating telescopic movement of the integrated plunger - slipper assembly, and a stirring loss measurement module for measuring, calculating, recording and displaying the stirring loss of the plunger pump. Among them, the reciprocating conversion module includes 9 right - angled bent rods, 1 push - pull disc, 3 support frames and 1 base, and the stirring loss measurement module includes 1 integrated cylinder - main shaft, 9 integrated plunger - slippers, 9 O - ring seals, 1 swash plate, 1 skeleton oil seal, 1 housing, 2 couplings, 1 torque sensor, 1 drive motor, 1 data acquisition card and 1 host computer.

[0038] In order to reduce the mechanical losses generated by other friction pairs of the plunger pump, the integrated cylinder - main shaft 13 is formed by integral machining, and the cylinder and the main shaft form an inseparable rigid connection; the integrated plunger - slipper 15 is formed by integral machining, and the plunger and the slipper form an inseparable rigid connection. The cylinder part of the integrated cylinder - main shaft 13 is a cylinder, and 9 cylinder holes 19 are evenly distributed along its circumference for installing the integrated plunger - slipper 15. The cylinder holes 19 do not penetrate the cylinder, but the depth of the cylinder holes 19 is greater than the length of the integrated plunger - slipper 15. The bottom end face of the cylinder of the integrated cylinder - main shaft 13 is as Figure 3 shown, and 9 right - angled bent rod through - holes 17 evenly distributed along the circumferential direction are provided. The centers of the through - holes are located on the distribution circle of the integrated plunger - slipper 15. Each right - angled bent rod 10 is matched with the right - angled bent rod through - hole 17, and an O - ring seal 18 is installed between the right - angled bent rod 10 and the right - angled bent rod through - hole 17 to prevent hydraulic oil leakage, as Figure 4 shown. The plunger part of the integrated plunger - slipper 15 is provided with an axial counterbore, and the horizontal end of the right - angled bent rod 10 is fixedly inserted into the counterbore, as Figure 4As shown in the figure. A gap of 3 mm - 5 mm is reserved between the bottom end face of the shoe of the integrated plunger - shoe 15 and the end face of the swash plate 14, avoiding the influence of mechanical losses caused by the friction of the shoe pair on the measurement result of the stirring loss. A gap of 1 mm is reserved between the plunger part of the integrated plunger - shoe 15 and the cylinder bore 19, avoiding the influence of mechanical losses caused by the friction of the plunger pair on the measurement result of the stirring loss. A skeleton oil seal 11 is installed between the inner wall of the housing 16 and the outer wall of the cylinder part of the integrated cylinder - main shaft 13 to prevent hydraulic oil leakage. The main shaft part of the integrated cylinder - main shaft 13 passes through the swash plate 14 and is fitted with the first coupling 1. The enclosed space formed among the housing 16, the swash plate 14, the skeleton oil seal 11, the integrated cylinder - main shaft 13 and the integrated plunger - shoe 15 is the oil stirring area 12. The output shaft of the driving motor 4 is connected to the torque sensor 2 through the second coupling 3, and the torque sensor 2 is connected to the integrated cylinder - main shaft 13 through the first coupling 1, thereby driving the integrated cylinder - main shaft 13 to rotate. The torque sensor 2 senses the torque acting on the integrated cylinder - main shaft 13 and converts it into an analog voltage signal and transmits it to the data acquisition card 5. The data acquisition card 5 converts the analog voltage signal into a digital voltage signal and transmits it to the upper computer 6.

[0039] Due to the gap between the swash plate 14 and the integrated plunger - shoe 15, the swash plate 14 cannot directly provide the supporting force for the reciprocating motion of the integrated plunger - shoe 15. Therefore, the present invention provides a reciprocating conversion module to realize the axial reciprocating telescopic motion of the integrated plunger - shoe 15. The present invention designs a push - pull disc 9, and its structure is as Figure 5 shown. Three support frame mounting holes 21 are provided, which cooperate with three support frames 8 to fix the push - pull disc 9. The push - pull disc 9 is fixed on the base 7 through the support frames 8. One closed - arc right - angled lever push - pull groove 22 is provided, as Figure 5 shown. Its width is greater than the diameter of the right - angled lever 10, and the center line of the right - angled lever push - pull groove 22 is the movement track of the center of the cross - section of the right - angled lever 10. The right - angled lever push - pull groove 22 penetrates through the push - pull disc 9, and guide rails are arranged in the groove. Nine sleeves 23 are embedded in the guide rails. The outer wall of the sleeve 23 cooperates with the inner wall of the right - angled lever push - pull groove 22, and the inner wall of the sleeve 23 cooperates with the right - angled lever 10. The specific installation method refers to Figure 6 . The shape of the right - angled lever push - pull groove 22 is designed according to the actual movement track of the plunger - shoe assembly of the axial piston pump. A space rectangular coordinate system O - x - y - z is established at the center of the swash plate. The z - axis is coaxial with the axis of the integrated cylinder - main shaft 13, the x - axis is along the vertical diameter, and the y - axis is along the horizontal diameter. Define the cross - section center coordinates of the integrated plunger - shoe 15 as (x O , y O , z O ), z O represents the movement track of the integrated plunger - shoe 15 for axial reciprocating telescopic motion, xO and y O represents the circumferential rotation locus of the integrated plunger - slipper 15. Let R represent the radius of the distribution circle of the integrated plunger - slipper 15, β represent the swash - plate angle, and define the rotational deflection angle of the integrated plunger - slipper 15 around z as θ. Then there are:

[0040] ;

[0041] Establish a plane rectangular coordinate system at the center of the push - pull disk 9. Define the position coordinates of the center of the cross - section of the right - angled bent rod relative to the center of the push - pull disk as , is the projection of the circumferential rotation locus of the right - angled bent rod 10 following the integrated plunger - slipper 15 on the horizontal plane, is the projection of the axial reciprocating telescopic locus of the right - angled bent rod 10 following the integrated plunger - slipper 15 on the horizontal plane. Then there are:

[0042] ;

[0043] Express the position coordinates of the center of the cross - section of the right - angled bent rod relative to the center of the push - pull disk using the fixed parameters R and β. Then there are:

[0044] ;

[0045] The center line of the push - pull groove 22 of the right - angled bent rod restricts the push - pull locus 20 of the right - angled bent rod as follows:

[0046] ;

[0047] When the drive motor 4 starts, the output torque is transmitted to the integrated cylinder - main shaft 13 through the second coupling 3, torque sensor 2, and first coupling 1, driving the integrated cylinder - main shaft 13 to rotate. Nine integrated plunger - slipper assemblies are installed in the nine cylinder bores 19 of the integrated cylinder bore - main shaft and perform circumferential rotational motion around the axis of the integrated cylinder - main shaft 13 at the same rotational speed. The right - angled bent rod 10 fixed to the integrated plunger - slipper 15 also performs circumferential rotational motion accordingly. Constrained by the push - pull groove 22 of the right - angled bent rod on the push - pull disk, while performing circumferential rotational motion, the right - angled bent rod 10 also performs axial reciprocating telescopic motion according to the push - pull locus 20 given by the center line of the push - pull groove 22 of the right - angled bent rod, thereby driving the integrated plunger - slipper 15 to perform axial reciprocating telescopic motion in the cylinder bore 19.

[0048] Based on a plunger - slipper assembly reciprocating telescopic plunger pump stirring loss measurement device provided by the present invention, the test method for the plunger pump stirring loss is as follows:

[0049] Step 1: The stirring zone 12 of the plunger pump stirring loss measurement device with a reciprocating piston-shoe assembly is filled with hydraulic oil, and the non-stirring zone is filled with oil to ensure lubrication. The drive motor 4 is started and the speed is set to 1000 rpm. When the output speed of the drive motor 4 stabilizes at 1000 rpm, the data acquisition card 5 is started with a sampling frequency of 10 Hz and a sampling time of 1 minute. A total of 600 voltage values M representing the torque applied to the integrated cylinder-spindle 13 are collected. 湿 ={M 湿1 , M 湿2 , …, M 湿600}, the collected values are uploaded to the host computer 6 for storage and then the drive motor 4 is turned off;

[0050] Step 2: Drain the hydraulic oil in the oil stirring area 12 and fill the non-oil stirring area with oil to ensure lubrication. Start the drive motor and set the speed to 1000 rpm. When the output speed of the drive motor 4 stabilizes at 1000 rpm, start the data acquisition card 5 with a sampling frequency of 10 Hz and a sampling time of 1 minute. A total of 600 voltage values M representing the torque of the integrated cylinder-spindle 13 are collected. 干 ={M 干1 , M 干2 , …, M 干600}, the collected values are uploaded to the host computer 6 for storage and then the drive motor 4 is turned off;

[0051] Step 3: Stirring loss of the plunger pump at 1000 rpm The calculation is as follows:

[0052] ;

[0053] Step 4: Change the output speed of the driving motor 4, repeat steps 1, 2, and 3, and obtain a stirring loss characteristic diagram of the plunger pump stirring loss-speed.

[0054] In order to remove the mechanical losses generated by the three major friction pairs of the plunger pump and avoid the "burning pump" phenomenon under the dry casing, the present invention removes the distribution plate, avoiding the influence of the mechanical losses generated by the friction of the distribution pair on the stirring loss measurement results; there is a 1 mm gap between the integrated plunger-slipper 15 and the inner wall of the cylinder hole 19, avoiding the influence of the mechanical losses generated by the friction of the plunger pair on the stirring loss measurement results; a 3 mm-5 mm gap is retained between the bottom end face of the slipper of the integrated plunger-slipper 15 and the end face of the inclined plate, avoiding the influence of the mechanical losses generated by the friction of the slipper pair on the stirring loss measurement results.

[0055] The plunger pump stirring loss measurement device for the reciprocating telescopic plunger-slider assembly provided by the present invention avoids the "pump burning" phenomenon of the dry housing by stripping the mechanical loss generated by the friction pair of the rotating assembly, and fully considers the quasi-real working conditions of the reciprocating telescopic motion of the plunger-slider assembly, realizing the accurate measurement of the stirring loss of the plunger pump, thereby providing a reliable experimental test device for the analysis of the stirring loss characteristics and the study of the energy consumption distribution of the plunger pump.

[0056] The above are only specific embodiments of the present invention, and those skilled in the art can adjust the parameters or structures according to actual needs, but these adjustments should all fall within the protection scope of the present invention.

Claims

1. A measuring device for stirring loss of a plunger pump with reciprocating telescopic plunger-boot assembly, characterized in that, The device includes a reciprocating conversion module and a stirring loss measurement module; The reciprocating conversion module is used to realize the reciprocating telescopic motion of the integrated plunger-slider assembly, and includes a right-angle bent rod, a push-pull disc, a support frame and a base; The push-pull disc is provided with a support frame mounting hole and a right-angle bent rod push-pull groove. The support frame mounting hole cooperates with the support frame, and the support frame and the base are fixedly connected; the right-angle bent rod push-pull groove penetrates through the push-pull disc. A guide rail is arranged in the right-angle bent rod push-pull groove, a sleeve is embedded in the guide rail in the right-angle bent rod push-pull groove, the inner wall of the right-angle bent rod push-pull groove cooperates with the outer wall of the sleeve, and the right-angle bent rod cooperates with the inner wall of the sleeve; the shape of the right-angle bent rod push-pull groove is designed according to the actual movement track of the plunger-slider assembly of the axial piston pump; The stirring loss measurement module is used to measure, calculate, record and display the stirring loss of the piston pump, and includes an integrated cylinder body-main shaft, an integrated plunger-slider, a swash plate, a housing, a torque sensor, a driving motor and a data acquisition card; 2. The plunger pump stirring loss measurement device for reciprocating telescoping of a plunger-slider assembly according to claim 1, wherein, Establish a coordinate system at the center of the push-pull disc , the push-pull groove of the right-angle bent rod constrains the push-pull trajectory of the right-angle bent rod to the following relationship: ； Among them, represents the position coordinates of the center of the cross-section of the right-angled bent rod relative to the center of the push-pull disk, reflects the projection on the horizontal plane of the circumferential rotational movement trajectory of the right-angled bent rod along with the integrated plunger-slider, reflects the projection on the horizontal plane of the axial reciprocating telescopic movement trajectory of the right-angled bent rod along with the integrated plunger-slider, β represents the inclination angle of the swash plate, and R represents the distribution circle radius of the integrated plunger-slider.

3. The plunger pump stirring loss measurement device for reciprocating telescoping of the plunger-slider assembly according to claim 1, characterized in that, The integrated cylinder body-main shaft is evenly distributed with cylinder holes along the circumference of the cylinder body for installing the integrated plunger-slider; through holes for right-angle bent rods are evenly distributed along the circumference of the bottom end face of the cylinder body and cooperate with the right-angle bent rods; an axial counterbore is provided on the plunger part of the integrated plunger-slider, and the right-angle bent rod is fixedly inserted into the counterbore; the housing cooperates with the swash plate at the end close to the driving motor, and the housing cooperates with the integrated cylinder body-main shaft at the end far from the driving motor; a skeleton oil seal is installed between the housing and the integrated cylinder body-main shaft; the integrated cylinder body-main shaft passes through the swash plate and is connected to the output end of the driving motor through a torque sensor; the sealed area formed by the housing, the integrated cylinder body-main shaft, the integrated plunger-slider, the swash plate and the skeleton oil seal is the oil stirring area of the stirring loss measurement module; the data acquisition card collects the voltage signals of the torque sensor when the oil stirring area is filled with hydraulic oil and when the hydraulic oil is drained, and calculates the stirring loss.

4. A plunger pump stirring loss measurement device for reciprocating telescoping of a plunger-slider assembly according to claim 1, characterized in that, The right-angle bent rod includes a horizontal section and a vertical section. The horizontal section of the right-angle bent rod cooperates with the integrated cylinder body-main shaft, and the vertical section of the right-angle bent rod cooperates with the sleeve in the right-angle bent rod push-pull groove of the push-pull disc.

5. A plunger pump stirring loss measurement device for reciprocating telescoping of a plunger-slider assembly according to claim 1, characterized in that, The depth of the cylinder hole of the integrated cylinder body-main shaft is greater than the length of the integrated plunger-slider, but the cylinder hole does not penetrate the integrated cylinder body-main shaft.

6. The plunger pump stirring loss measuring device for reciprocating telescoping of a plunger-slider assembly according to claim 1, characterized in that, The axis of the cylinder hole is located on the distribution circle of the integrated plunger-slider. An O-ring is installed between the through hole for the right-angle bent rod and the right-angle bent rod.

7. The piston pump stirring loss measurement device for reciprocating telescopic motion of a plunger-slider assembly according to claim 1, characterized in that 8. A plunger pump stirring loss measurement device for reciprocating telescoping of a plunger-slider assembly according to claim 1, characterized in that, When the oil stirring area is filled with hydraulic oil and when the hydraulic oil is drained, the voltage signal of the torque sensor is collected through the data acquisition card to calculate the stirring loss of the piston pump.

9. A plunger pump stirring loss measurement device for reciprocating telescoping of a plunger-slider assembly according to claim 1, characterized in that, There is a gap of 3 mm - 5 mm between the end face of the slider at the bottom of the integrated plunger-slider and the end face of the swash plate.

10. A method for measuring the stirring loss of a plunger pump of a plunger pump stirring loss measuring device that reciprocally expands and contracts based on the plunger-boot assembly according to any one of claims 1-9, characterized in that, There is a gap of 1 mm between the surface of the plunger of the integrated plunger-slider and the inner wall of the cylinder hole. [[ID=~13]]The method includes the following steps: Step 1: Fill the oil stirring area of the plunger pump stirring loss measuring device with hydraulic oil, and fill the non-oil stirring area with oil to ensure lubrication; start the driving motor and set the rotational speed. After the output rotational speed is stable, start the data acquisition card, collect multiple sets of voltage values representing the torque received by the integrated cylinder block - main shaft, upload them to the host computer for storage, and then turn off the driving motor; Step 2: Drain all the hydraulic oil in the oil stirring area, and fill the non-oil stirring area with oil to ensure lubrication; start the driving motor and set the same rotational speed as in Step 1; when the output rotational speed is stable, start the data acquisition card, collect the same number of sets of voltage values representing the torque received by the integrated cylinder block - main shaft as in Step 1, upload them to the host computer for storage, and then turn off the driving motor; Step 3: Take the average of the multiple sets of voltage values in Step 1 and Step 2 respectively and then make a difference to obtain the stirring loss of the plunger pump at the rotational speed set in Step 1; Step 4: Change the output rotational speed of the driving motor set in Step 1, repeat Steps 1 to 3, and obtain the stirring loss characteristic diagram of the plunger pump stirring loss - rotational speed.

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