An automatic centering and controllable wear angle friction and wear testing device for plunger sleeves

Abstract

This invention discloses an automatic centering and controllable wear angle friction and wear testing device for plunger sleeves, relating to the field of plunger-sleeve wear testing. The device comprises: a rack support, a force application device for the experimental plunger, a parallel motion device, a support plate, a vertical motion power device, a swinging device, an integral plate, and the vertical motion device. The force application device for the experimental plunger is equipped with a rack that drives the plunger clamping device to move left and right. The parallel motion device includes a slider, a guide rail, and other devices. The vertical motion power device includes a drive slider, a guide rail, and other devices. The swinging device includes gears. This invention addresses the technical problems of existing plunger sleeve friction testing devices that rely solely on manual positioning, cannot adapt to different size combinations according to testing requirements, and cannot achieve coaxial and wear condition testing.

Description

Technical Field

[0001] This invention relates to the field of plunger-sleeve wear testing, specifically to a plunger-sleeve automatic centering and wear angle controllable friction and wear testing device. Background Technology

[0002] Piston pumps are core power components widely used in engineering hydraulic systems, and their overall performance and stability directly determine the operating efficiency and reliability of various hydraulic machinery. Among these components, the friction pair formed by the piston and sleeve is one of the most critical kinematic mating structures within the piston pump, significantly affecting its overall performance. In actual working conditions, an improperly designed piston-sleeve friction pair can easily lead to failures such as excessive friction, abrasive wear, and adhesive wear on the sleeve surface, resulting in accelerated sleeve wear and abnormally widened clearances. Such failures not only reduce the performance of the piston pump but also significantly shorten the overall service life of the equipment.

[0003] Current mainstream plunger-sleeve friction testing devices rely on fixed structures to achieve friction testing functions. Their core shortcomings are concentrated in three points: First, they lack the ability to adapt and adjust the size. Existing devices cannot cope with changes in the size and specifications of the plunger and sleeve, which can easily lead to clamping failure. Second, they lack eccentric wear testing. They can only complete friction tests when the plunger and sleeve are coaxial, and cannot simulate eccentric wear conditions when the two are not on the same straight line. Third, their positioning accuracy is insufficient. The testing device cannot achieve automatic positioning of the center between the plunger and sleeve, and requires manual calibration, which is difficult to match the testing requirements of high-precision friction experiments.

[0004] Therefore, we propose an automatic centering and controllable wear angle friction and wear test device for plunger sleeves to solve the problems mentioned above. This friction and wear test device can carry out friction and wear performance test research under different load conditions, which has great engineering research value and practical application significance for improving the overall service performance of plunger pumps and extending equipment service life. Summary of the Invention

[0005] This invention provides a more efficient automatic centering and controllable wear angle friction and wear testing device for plunger sleeves, which solves the technical problem mentioned in the background art that relies solely on manual control and cannot measure the wear state.

[0006] The technical solution adopted in this invention is: a friction and wear testing device for automatic centering and controllable eccentricity angle of a plunger sleeve, comprising: The rack support is composed of a right plate, a left plate, and a first bottom plate, which are threadedly connected to a fixing plate through bolt holes in the upper half, bolt holes in the upper half, and bolt holes in the rack mounting plate. The right plate has a pre-reserved groove for a first motor to accommodate the first motor fixing component, the motor, and corresponding bolt holes. The left plate has a groove for accommodating the rack fixing component, the rack, and a pre-reserved groove for the rack fixing component, as well as a mounting hole for the second gear shaft. The experimental plunger force application device comprises a rack and pinion device whose power part consists of a first motor fixing component, a first motor, a first gear shaft, and a first gear; a rack and pinion device whose transmission part consists of a second gear, a first bearing, a second gear shaft, and a third gear; a rack and pinion device whose rack and pinion part consists of a rack fixing component and a rack; and a plunger clamping device whose clamping part consists of a guide shaft, a first nut, a first slider, a rotating block, a second nut, a rotating block fixing shaft, and a base plate. The first motor fixing component has corresponding bolt holes; the rack fixing component has corresponding bolt holes; the rack has plunger clamping device bolt holes; the guide shaft has guide shaft threads; the rotating block fixing shaft has rotating block fixing shaft threads; and the base plate has a first guide track, base plate bolt holes, and a plunger placement platform. A parallel motion device, wherein the sliding part of the parallel motion device is composed of a first guide rail and a second slider; the power part of the parallel motion device is composed of a nut sleeve auxiliary fixing component, a first lead screw, a second motor, a second motor fixing component, a first lead screw fixing component, a second bearing, and a first nut sleeve; the nut sleeve auxiliary fixing component is provided with corresponding bolt holes and a nut sleeve auxiliary fixing component reserved groove; the first lead screw fixing component is provided with corresponding bolt holes; the first nut sleeve is provided with a first nut sleeve reserved groove to accommodate the first lead screw and the corresponding bolt holes; The support plate is provided with bolt holes for the vertical motion device slider, bolt holes for the parallel motion device guide rail, a reserved groove for the second motor to accommodate the second motor, a second motor fixing component, a reserved groove for the vertical motion guide rail to accommodate the second guide rail, a reserved groove for the vertical motion screw to accommodate the second screw, bolt holes for the nut sleeve fixing, bolt holes for the motor fixing component, and bolt holes for the screw fixing component. A vertical motion power device is provided with a gear shaft fixing component, a first helical gear, a first helical gear fixing component, a third gear shaft, a fourth gear, a third motor fixing component, a third motor, a fourth gear shaft, and a fifth gear; the gear shaft fixing component is provided with corresponding bolt holes; the third motor fixing component is provided with corresponding bolt holes; The swinging device has a third bearing, a pre-reserved groove for accommodating a second gear placement shaft, and a fourth bearing on its bottom plate. The transmission part of the swinging device includes a sixth gear, a fifth gear shaft, a seventh gear, and a sixth gear shaft. The main support of the swinging device has fixing bolts, a vertical platform, fixing holes, and a second guide track. The sixth gear has a guide rod that mates with the guide track. The fifth gear shaft has a first gear placement shaft. The sixth gear shaft has a second gear placement shaft, a handle, and a fixing shaft for fixing to the fixing holes. The vertical platform has a sleeve placement platform and a clamping hole for clamping the sleeve with fixing bolts. The integral plate has a third motor reserved groove for accommodating the third motor fixing component and the third motor, a gear shaft fixing component reserved groove for accommodating the gear shaft fixing component, a vertical motion screw shaft rotating fixing component groove for accommodating the screw shaft rotating fixing component, a vertical motion screw shaft fixing component groove for accommodating the second screw shaft, and a vertical motion guide rail reserved groove for accommodating the second guide rail. The vertical motion device comprises a transmission part consisting of a lead shaft rotation fixing component, a second helical gear, a second lead shaft, a fifth bearing, a second lead shaft fixing component, and a second nut sleeve; the transmission part of the vertical motion device also comprises a slider auxiliary fixing component, a third slider, and a second guide rail; the lead shaft rotation fixing component has corresponding bolt holes and a reserved groove for accommodating the second lead shaft; the second lead shaft fixing component has corresponding bolt holes; the second nut sleeve has corresponding bolt holes; the slider auxiliary fixing component has corresponding bolt holes; the third slider has corresponding bolt holes; and the second guide rail has corresponding bolt holes.

[0007] Furthermore, the third motor and the third motor fixing component are threadedly connected to the overall plate through the reserved groove of the third motor; the fifth gear is fixedly connected to the third motor through the fourth gear shaft; the fourth gear and the first helical gear are fixedly connected to the third gear shaft through the gear shaft fixing component; the third gear shaft is fixed to the gear shaft fixing component through the reserved stepped shaft; the gear shaft fixing component is threadedly connected to the overall plate through the reserved groove of the gear shaft fixing component.

[0008] Furthermore, the second nut sleeve is connected to the second lead screw via a pre-reserved groove; the second helical gear, the lead screw rotating fixing component, the fifth bearing, and the second lead screw fixing component are connected to the second lead screw via a pre-reserved stepped shaft; the lead screw rotating fixing component and the second lead screw fixing component are threadedly connected to the overall plate via the groove of the vertical motion lead screw rotating fixing component and the groove of the vertical motion lead screw fixing component, respectively; the third slider is threadedly connected to the slider auxiliary fixing component via bolt holes; the second guide rail is connected to the third slider via a pre-reserved groove, and then threadedly connected to the overall plate via the pre-reserved groove of the vertical motion guide rail; the support plate is threadedly connected to the slider auxiliary fixing component and the second nut sleeve via the bolt holes of the vertical motion device slider and the fixing bolt holes of the nut sleeve, respectively.

[0009] Furthermore, the first nut sleeve is connected to the nut sleeve auxiliary fixing component and the first screw shaft through bolt holes and reserved grooves respectively; the first screw shaft is connected to the second motor, the second motor fixing component, the first screw shaft fixing component and the second bearing through reserved stepped shafts; the first guide rail is connected to the second slider through reserved grooves; the first guide rail and the first screw shaft fixing component are threadedly connected to the support plate through the parallel motion device guide rail bolt holes; the second slider and the nut sleeve auxiliary fixing component are threadedly connected to the first bottom plate through the parallel motion bolt holes.

[0010] Furthermore, the first motor fixing component is threadedly connected to the first motor and the right plate through the motor bolt hole and the reserved groove of the first motor respectively; the first gear is connected to the first motor through the first gear shaft; the second gear, the first bearing and the third gear are connected to the second gear shaft through the reserved stepped shaft; the first bearing is connected to the left plate through the gear shaft placement hole; the rack fixing component is threadedly connected to the rack and the left plate through the reserved groove and the rack fixing component bolt hole respectively; the left plate is connected to the right plate through the fixing plate; the left plate and the right plate are fixedly connected to the first bottom plate through the lower bolt hole of the rack plate and the lower bolt hole of the upper half.

[0011] Furthermore, the first slider engages with the base plate and guide shaft via the first guide trajectory; the first slider is fixedly connected to the base plate via the first slider bolt hole; the rotating block engages with the rotating block fixing shaft via a pre-reserved groove and rotates, and is threadedly fixed to the rotating block fixing shaft via the second nut; the base plate is threadedly connected to the rack via the base plate bolt hole.

[0012] Furthermore, the sixth and seventh gears are respectively connected to the fifth and sixth gear shafts via reserved stepped shafts; the fifth and sixth gear shafts are engaged with the second bottom plate via the first and second gear placement shafts; and the sixth gear shaft is fixedly connected to the vertical platform via a fixed shaft.

[0013] In this experiment, the clamping part of the plunger clamping device was first removed, and the plunger was placed on the plunger placement platform. The first slider was fixed to the guide shaft and base plate in a certain position using the first nut. Then, the rotating block was adjusted to a certain angle according to the plunger size. Finally, the rotating block was fixed to the rotating block fixing shaft using the second nut, thus clamping the plunger between the two sliders. The clamping part of the plunger clamping device was fixed to the rack through the bolt holes in the base plate and the plunger clamping device. The sleeve was placed on the sleeve placement platform, and the fixing bolts were used to fix the sleeve to the sleeve placement platform through the clamping holes. After the test substrate was successfully placed, the third motor of the vertical motion device's power unit, controlled by a computer, drove the fifth gear to rotate. The meshing action between the gears then drove the third gear shaft to rotate, thereby driving the first helical gear to rotate. Through the meshing action of the first helical gear in the vertical motion device's power unit and the second helical gear in the vertical motion device's screw drive unit, the second screw shaft in the vertical motion device's screw drive unit rotated, thus causing the second nut to move vertically up and down. Due to the vertical motion device's screw drive unit... The second nut sleeve and the slider of the vertical motion device's slider transmission part are fixed together with the support plate, thus jointly driving the support plate to move up and down, positioning the plunger and sleeve in the vertical direction. The computer-controlled second motor of the parallel motion device's power part drives the first lead shaft to rotate, thereby causing the first nut sleeve to move back and forth in the parallel direction. Since the first nut sleeve of the parallel motion device's power part, the second slider of the parallel motion device's sliding part, and the bottom plate of the rack mounting device are fixedly connected, they jointly drive the bottom plate of the rack mounting device to move forward, positioning the plunger and sleeve in the horizontal direction. The computer-controlled first motor of the rack mounting device's power part drives the first gear shaft to rotate the first gear. Through the meshing of the first gear of the rack mounting device's power part with the second gear of the rack mounting device's transmission part, the third gear of the rack mounting device's transmission part rotates. Then, through the meshing of the third gear of the rack mounting device's transmission part with the rack of the rack mounting device, the rack drives the plunger clamping device, moving the plunger left and right along the sleeve, thus completing the friction and wear test.

[0014] Beneficial effects: This invention further improves the testing accuracy and applicability of plunger-sleeve friction experiments. Through a series of structural optimizations and functional designs, it achieves the adaptation testing of different sizes of plunger and sleeve, accurate simulation of uneven wear conditions, and automated positioning of the plunger and sleeve centers. This greatly expands the application scenarios of the experimental device, enabling high-precision friction and wear testing even under more complex actual service conditions. It makes the plunger-sleeve friction experiment more automated and efficient, providing a more scientific and precise technical means for the study of wear patterns of plunger-sleeve friction pairs. It has significant innovation and practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the left plate of the rack mounting device of the present invention; Figure 3 This is a schematic diagram of the right plate of the rack mounting device of the present invention; Figure 4 This is a schematic diagram of the structure of the bottom plate of the rack mounting device of the present invention; Figure 5 This is a schematic diagram of the structure of the rack mounting device fixing component of the present invention; Figure 6 This is a schematic diagram of the power section of the rack mounting device of the present invention; Figure 7 This is a schematic diagram of the transmission part of the rack and pinion device of the present invention; Figure 8 This is a schematic diagram of the rack structure of the rack mounting device of the present invention; Figure 9 This is a schematic diagram of the clamping part of the plunger clamping device of the present invention; Figure 10 This is a schematic diagram of the sliding part of the parallel motion device of the present invention; Figure 11 This is a schematic diagram of the power section of the parallel motion device of the present invention; Figure 12 This is a schematic diagram of the structure of the support plate of the present invention; Figure 13 This is a schematic diagram of the power unit of the vertical motion device of the present invention; Figure 14 This is a schematic diagram of the structure of the bottom plate of the swing motion device of the present invention; Figure 15 This is a schematic diagram of the transmission part of the swing motion device of the present invention; Figure 16 This is a schematic diagram of the main support structure of the swing motion device of the present invention; Figure 17 This is a schematic diagram of the overall plate structure of the present invention; Figure 18 This is a schematic diagram of the transmission part of the vertical motion device of the present invention; Figure 19This is a schematic diagram of the transmission part of the vertical motion device of the present invention; In the diagram: 1-Rack support; 2-Experimental plunger force application device; 3-Parallel motion device; 4-Support plate; 5-Vertical motion power device; 6-Oscillating device; 7-Integral plate; 8-Vertical motion device; 101-Lower bolt hole of upper half; 102-Upper bolt hole of upper half; 103-Reserved groove for first motor; 104-Right plate; 105-Left plate; 106-Lower bolt hole of rack plate; 107-Hole for gear shaft; 108-Reserved groove for rack fixing; 109-Relative motion slider bolt hole; 110-Lower bolt hole of rack plate; 111-First bottom plate; 112-Parallel motion bolt hole; 113-Fixing plate; 201-First gear; 202-First gear shaft; 20 3-First motor fixing component; 204-First motor; 205-Second gear; 206-First bearing; 207-Second gear shaft; 208-Third gear; 209-Rack; 210-Rack fixing component; 211-Plunger clamping device bolt hole; 212-Guide shaft; 213-First nut; 214-First guide track; 215-First slider; 216-First slider bolt hole; 217-Guide shaft thread; 218-Base plate bolt hole; 219-Rotating block; 220-Second nut; 221-Rotating block fixing shaft thread; 222-Rotating block fixing shaft; 223-Plunger placement platform; 224-Base plate; 301-First guide rail; 302-Second slider; 303-Nut sleeve auxiliary fixing component; 304- 305 - First lead screw; 306 - Second motor; 307 - Second motor fixing part; 308 - First lead screw fixing part; 309 - Second bearing; 310 - First nut sleeve; 311 - First nut sleeve reserved groove; 401 - Nut sleeve auxiliary fixing part reserved groove; 402 - Vertical motion device slider bolt hole; 403 - Parallel motion device guide rail bolt hole; 404 - Second motor reserved groove; 405 - Vertical motion guide rail reserved groove; 406 - Nut sleeve fixing bolt hole; 407 - Motor fixing part bolt hole; 408 - Lead screw fixing part bolt hole; 501 - Gear shaft fixing part; 502 - First helical gear; 503 - First helical gear fixing part; 504 - Third gear shaft; 50 5-Fourth gear; 506-Third motor fixing component; 507-Third motor; 508-Fourth gear shaft; 509-Fifth gear; 601-Third bearing; 602-First gear placement shaft reserved groove; 603-Second gear placement shaft reserved groove; 604-Fourth bearing; 605-Second bottom plate; 606-Sixth gear; 607-Guide rod; 608-Fifth gear shaft; 609-First gear placement shaft; 610-Second gear placement shaft; 611-Handle; 612-Seventh gear; 613-Sixth gear shaft; 614-Fixing shaft; 615-Fixing bolt; 616-Placement sleeve platform; 617-Vertical platform; 618-Fixing hole; 619-Second guide track; 620-Clamping hole;701 - Reserved groove for the third motor; 702 - Reserved groove for the gear shaft fixing component; 703 - Groove for the vertical motion lead screw rotation fixing component; 704 - Groove for the vertical motion lead screw fixing component; 705 - Reserved groove for the vertical motion guide rail; 801 - Lead screw rotation fixing component; 802 - Reserved groove for the lead screw rotation fixing component; 803 - Second helical gear; 804 - Second lead screw; 805 - Bearing; 806 - Second lead screw fixing component; 807 - Second nut sleeve; 808 - Slider auxiliary fixing component; 809 - Third slider; 810 - Second guide rail. Detailed Implementation

[0017] Example 1: As Figure 12 , Figure 13 , Figure 17 , Figure 18As shown, in this embodiment, the fourth gear 505 is fixedly connected to the third gear shaft 504 via a flat key; the helical gear 502 is fixedly connected to the third gear shaft 504 via a first helical gear fixing member 503; the third gear shaft 504 is connected to the gear shaft fixing member 501 via a reserved stepped shaft; the gear shaft fixing member 501 is positioned via a reserved groove 702, and then threadedly connected to the integral plate 7 via bolt holes on the gear shaft fixing member; the fifth gear 509 is fixedly connected to the fourth gear shaft 508 via a flat key; the fourth gear shaft 505... 8. The third motor 507 is fitted with a pre-reserved stepped shaft; the third motor fixing part 506 and the third motor 507 are positioned with the integral plate 7 through the pre-reserved groove 701 of the third motor, and then threadedly connected to the integral plate through the bolt holes of the motor fixing part; the second nut sleeve 807 is connected to the second screw shaft 804 through the pre-reserved hole in the middle of the nut sleeve; the second helical gear 803 is fixedly connected to the second screw shaft 804 through the pre-reserved stepped shaft; the fifth bearing 805 is connected to the second screw shaft fixing part 806 through the pre-reserved hole on the second screw shaft fixing part 806; the second The lead screw 804 is connected to the second lead screw fixing member 806 via the fifth bearing 805, and then connected to the lead screw rotating fixing member 801 via the pre-reserved groove 802 of the lead screw rotating fixing member; the lead screw rotating fixing member 801 is positioned via the groove 704 of the vertical movement lead screw rotating fixing member, and then threadedly connected to the integral plate 7 via the bolt holes of the lead screw rotating fixing member; the second lead screw fixing member 806 is threadedly connected to the integral plate 7 via the bolt holes of the lead screw fixing member; the third slider 809 is threadedly connected to the slider auxiliary fixing member 808 via the slider bolt holes, and then connected to the first… The pre-reserved groove of the second guide rail 810 enables connection with the second guide rail 810; the second guide rail 810 is positioned with the overall plate 7 through the pre-reserved groove 709 of the vertical motion guide rail, and then threadedly connected with the overall plate 7 through the bolt holes of the second guide rail 810; the slider auxiliary fixing part 808 is threadedly connected with the support plate 4 through the slider bolt hole 401 of the vertical motion device; the second lead screw 804 is positioned with the support plate 4 through the pre-reserved groove 405 of the lead screw in vertical motion; the support plate 4 is threadedly connected with the second nut sleeve 807 through the nut sleeve fixing bolt hole 406.

[0018] Furthermore, in some implementations of this embodiment, such as Figure 12 , Figure 13 , Figure 18 , Figure 19As shown, during the experiment, the third motor 507 drives the fifth gear 509 to rotate through the fourth gear shaft 508. The fifth gear 509, through meshing with the fourth gear 505, drives the fourth gear 505 to rotate. The rotation of the fourth gear 505 drives the third gear shaft 504 to rotate, thereby causing the first helical gear 502 to rotate. The rotation of the helical gear 502 drives the second helical gear 803 to rotate. The rotation of the second helical gear 803 drives the second lead screw 804 to rotate between the lead screw rotation fixing member 801 and the fifth bearing 805 in the lead screw fixing member. The rotation of the second lead screw 804 drives the second nut sleeve 807 to move vertically up and down. Since the second nut sleeve 807 and the slider auxiliary fixing member 808 are fixedly connected to the support plate 4, the movement of the second nut sleeve 807 drives the slider auxiliary fixing member 808 and the third slider 809 to move vertically up and down along the predetermined path of the second guide rail 810. The second nut sleeve 807 and the slider auxiliary fixing member 808 simultaneously support the support plate 4 to move vertically up and down.

[0019] Example 2: In this example, as Figure 4 , Figure 10 , Figure 11 As shown, the first guide rail 301 is threadedly connected to the support plate 4 via the parallel motion device guide rail bolt hole 402; the second slider 302 is positioned with the first guide rail 301 via the reserved groove of the first guide rail 301; the first nut sleeve 309 is threadedly connected to the nut sleeve auxiliary fixing part 303 via the bolt hole, and then connected to the first screw spool 304 via the reserved groove 310 of the first nut sleeve and the reserved groove 311 of the nut sleeve auxiliary fixing part; the screw spool 304 is connected to the second motor 305 via the reserved stepped shaft, and then connected to the first... The two bearings 308 are connected; the second bearing 308 is connected to the first screw shaft fixing member 307 through the reserved groove of the first screw shaft fixing member 307; the second motor fixing member 306 and the second motor 305 are threadedly connected to the support plate member 4 through bolt holes; the first screw shaft fixing member 307 is threadedly connected to the support plate member 4 through bolt holes; the first bottom plate member 111 is threadedly connected to the second slider 302 through the parallel motion slider bolt hole 109, and then threadedly connected to the nut sleeve auxiliary fixing member 303 through the parallel motion bolt hole 112.

[0020] Furthermore, in some implementations of this embodiment, such as Figure 4 , Figure 11As shown, during the experiment, the second motor 305 drives the lead screw 304 to rotate within the second bearing 308 of the first lead screw fixing member 307. The rotation of the lead screw 304 causes the nut sleeve auxiliary fixing member 303 and the first nut sleeve 309 to move back and forth in the horizontal direction. Since the second slider 302 and the nut sleeve auxiliary fixing member 303 are connected and fixed to the first bottom plate 111, the movement of the first nut sleeve 309 causes the second slider 302 to move back and forth in the predetermined trajectory of the first guide rail 301. The first nut sleeve 309 and the second slider 302 simultaneously drive the first bottom plate 111 to move back and forth in the horizontal direction.

[0021] Example 3: In this example, as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the first gear shaft 202 is connected to the first gear 201 and the first motor 204 via a reserved stepped shaft; the first motor fixing part 203 is threadedly connected to the first motor 204 via bolt holes, then positioned via the reserved groove 103 of the first motor, and finally threadedly connected to the right plate 104 via the bolt holes 105 of the motor fixing device; the rack 209 is connected to the rack fixing part 210 via a reserved groove; the rack fixing part 210 is connected to the left plate 105 via the reserved groove 108 of the rack fixing part; the first bearing 206 is connected to the second gear shaft 207 via a reserved stepped shaft. The second gear 205 and the third gear 208 are connected to the second gear shaft 207 through a reserved stepped shaft; the first bearing 206 is connected to the left plate 105 through the gear shaft hole 107; the left plate 105 is threaded to the right plate 104 through the engagement of the fixing plate 113 with the upper bolt hole 102, and then threaded to the first bottom plate 111 through the lower bolt hole 106 and the lower bolt hole 110 of the rack plate; the right plate 104 is threaded to the first bottom plate 111 through the lower bolt hole 101 of the upper plate and the lower bolt hole 110 of the rack plate.

[0022] Furthermore, in some implementations of this embodiment, such as Figure 6 , Figure 7 , Figure 8As shown, during the experiment, the first motor 204 drives the first gear shaft 202 to rotate. The engagement between the gear shaft 202 and the first gear 201 drives the first gear 201 to rotate. The first gear 201 drives the third gear 208 to rotate through meshing with the third gear 208. The rotation of the third gear 208 drives the second gear shaft 207 to rotate, and the rotation of the second gear shaft 207 drives the second gear 205 to rotate. Since the first bearing 206 is fixed in the left plate 105, the second gear 205 and the third gear 208 rotate in a fixed position. The second gear 205 drives the rack 209 to move left and right in the horizontal direction through meshing with the rack 209 and the rack fixing member 210 on the left plate 105.

[0023] Example 4: In this example, as Figure 8 , Figure 9 As shown, the base plate 224 is threadedly connected to the rack 209 through the plunger clamping device bolt hole 211 and the base plate bolt hole 218; the first slider 215 is connected to the base plate 224 through the first guide track 214; the first slider 215 is fixedly connected to the base plate 224 through the first slider bolt hole 216; the guide shaft 212 is connected to the first slider 215 through the positioning of the reserved hole, and then threadedly connected to the first nut 213 through the guide shaft thread 217; the rotating block 219 is connected to the rotating block fixing shaft 222 through the reserved shaft hole; the second nut 220 is fixedly connected to the rotating block fixing shaft 222 through the rotating block fixing shaft thread 221.

[0024] Furthermore, in some implementations of this embodiment, such as Figure 9 As shown, during the experiment, the plunger required for the experiment is first placed on the plunger placement platform 223. The rotating block 219 next to the first slider 215 is driven to rotate on the rotating block fixed shaft 222, which drives the moving slider 215 to move up and down in the vertical direction with the assistance of the first guide track 214 and the guide shaft 212. Since the first slider 215 is fixed on the base plate 224, the required size can be obtained by simply moving the first slider 215. After the first slider 215 is moved to the required size of the plunger, the second nut 220 is rotated along the rotating block fixed shaft thread 221, so that the rotating block 219 is fixed on the rotating block fixed shaft 222, and the plunger is fixed on the clamping device.

[0025] Example 5: In this example, as Figure 14 , Figure 15 , Figure 16As shown, the third bearing 601 is connected to the second bottom plate 605 through the pre-reserved groove 602 of the first gear placement shaft; the fourth bearing 604 is connected to the bottom plate 605 through the pre-reserved groove 603 of the second gear placement shaft; the sixth gear 606 is connected to the fifth gear shaft 608 through a pre-reserved stepped shaft; the seventh gear 612 is connected to the sixth gear shaft 613 through a pre-reserved stepped shaft; the fifth gear shaft 608 is connected to the fourth bearing 604 through the first gear placement shaft 609, and then connected to the vertical platform 617 through the cooperation of the guide rod 607 and the second guide track 619; the sixth gear shaft 613 is connected to the third bearing 601 through the second gear placement shaft 610, and then connected to the vertical platform 617 through the cooperation of the fixed shaft 614 and the fixed hole 618; the fixing bolt 615 is connected to the vertical platform 617 through the tightening hole 620.

[0026] Furthermore, in some implementations of this embodiment, such as Figure 14 , Figure 15 , Figure 16 As shown, during the experiment, the sixth gear shaft 613 is first driven to rotate under the constraint of the third bearing 601 by manually controlling the handle 611 to rotate to a certain position. The rotation of the sixth gear shaft 613 drives the rotation of the seventh gear 612. The seventh gear 612 drives the rotation of the sixth gear 606 by meshing with the sixth gear 606. The vertical platform 617 rotates together with the sixth gear shaft 613. Because the guide rod 607 on the sixth gear 606 has a constraint with the second guide trajectory 619, the entire swing device can be fixed within a certain angle range. Then, the sleeve is placed on the sleeve placement platform 616 and fixed on the sleeve placement platform 616 by the fixing bolt 615, so that the plunger sleeve wear experiment can be carried out.

[0027] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A friction and wear testing device for automatic centering and controllable eccentricity angle of a plunger sleeve, comprising: The rack support (1) is made of a right plate (104), a left plate (105) and a first bottom plate (111), which are threadedly connected to a fixing plate (113) through the lower bolt hole (101) of the upper half, the upper bolt hole (102) of the upper half and the lower bolt hole (106) of the rack plate; the right plate (104) is provided with a first motor reserved groove (103) to accommodate the first motor fixing part (203), the motor (204) and the corresponding bolt hole; the left plate (105) is provided with a groove for accommodating the rack fixing part (210) and the rack (209) and a rack fixing part reserved groove (108), as well as a gear shaft hole (107) for accommodating the second gear shaft (207); The experimental plunger force application device (2) has a rack mounting device whose power part is composed of a first motor fixing part (203), a first motor (204), a first gear shaft (202), and a first gear (201); the rack mounting device transmission part is composed of a second gear (205), a first bearing (206), a second gear shaft (207), and a third gear (208); the rack part of the rack mounting device is composed of a rack fixing part (210) and a rack (209); and the plunger clamping device clamping part is composed of a guide shaft (212), a first nut (213), a first slider (215), and a rotating block (216). 9) The second nut (220), the rotating block fixing shaft (222), and the base plate (224) are jointly composed of the second nut (220), the rotating block fixing shaft (222), and the base plate (224); the first motor fixing component (203) is provided with corresponding bolt holes; the rack fixing component (210) is provided with corresponding bolt holes; the rack (209) is provided with plunger clamping device bolt holes (211); the guide shaft (212) is provided with guide shaft threads (217); the rotating block fixing shaft (222) is provided with rotating block fixing shaft threads (221); the base plate (224) is provided with a first guide track (214), base plate bolt holes (218), and a plunger placement platform (223); The parallel motion device (3) has a sliding part composed of a first guide rail (301) and a second slider (302); its power part is composed of a nut sleeve auxiliary fixing part (303), a first screw shaft (304), a second motor (305), a second motor fixing part (306), a first screw shaft fixing part (307), a second bearing (308), and a first nut sleeve (309); the nut sleeve auxiliary fixing part (303) is provided with corresponding bolt holes and a nut sleeve auxiliary fixing part reserved groove (311); the first screw shaft fixing part (307) is provided with corresponding bolt holes; the first nut sleeve (309) is provided with a first nut sleeve reserved groove (310) to accommodate the first screw shaft (304) and the corresponding bolt holes; The support plate (4) is provided with bolt holes (401) for the vertical motion device slider, bolt holes (402) for the parallel motion device guide rail, a groove (403) for the second motor to accommodate the second motor (305), a second motor fixing part (306), a groove (404) for the vertical motion guide rail to accommodate the second guide rail (810), a groove (405) for the vertical motion screw to accommodate the second screw (804), a bolt hole (406) for fixing the nut sleeve, a bolt hole (407) for fixing the motor and a bolt hole (408) for fixing the screw. A vertical motion power device (5) is provided with a gear shaft fixing member (501), a first helical gear (502), a first helical gear fixing member (503), a third gear shaft (504), a fourth gear (505), a third motor fixing member (506), a third motor (507), a fourth gear shaft (508), and a fifth gear (509); the gear shaft fixing member (501) is provided with corresponding bolt holes; the third motor fixing member (506) is provided with corresponding bolt holes; The swing device (6) has a third bearing (601), a first gear placement shaft pre-reserved groove (602) for accommodating the second gear placement shaft (610), a second gear placement shaft pre-reserved groove (603) for accommodating the first gear placement shaft (609), and a fourth bearing (604) on its bottom plate; the swing device transmission part is equipped with a sixth gear (606), a fifth gear shaft (608), a seventh gear (612), and a sixth gear shaft (613); the main support of the swing device is equipped with fixing bolts (615) and a vertical platform (617). The sixth gear (606) is provided with a fixed hole (618) and a second guide track (619); the sixth gear (606) is provided with a guide rod (607) that cooperates with the guide track (619); the fifth gear shaft (608) is provided with a first gear placement shaft (609); the sixth gear shaft (613) is provided with a second gear placement shaft (610), a handle (611) and a fixed shaft (614) for fixing to the fixed hole (618); the vertical platform (617) is provided with a sleeve placement platform (616) and a clamping hole (620) for clamping the sleeve fixing bolt (615); The integral plate (7) is provided with a third motor reserved groove (701) for accommodating the third motor fixing part (506) and the third motor (507), a gear shaft fixing part reserved groove (702) for accommodating the gear shaft fixing part (501), a vertical motion screw shaft rotating fixing part groove (703) for accommodating the screw shaft rotating fixing part (801), a vertical motion screw shaft fixing part groove (704) for accommodating the second screw shaft (804), and a vertical motion guide rail reserved groove (705) for accommodating the second guide rail (810); The vertical motion device (8) comprises a transmission part consisting of a screw shaft rotation fixing part (801), a second helical gear (803), a second screw shaft (804), a fifth bearing (805), a second screw shaft fixing part (806), and a second nut sleeve (807); the transmission part of the vertical motion device comprises a slider auxiliary fixing part (808), a third slider (809), and a second guide rail (810); the screw shaft rotation fixing part (801) is provided with corresponding bolt holes and a screw shaft rotation fixing part reserved groove (802) for accommodating the second screw shaft (804); the second screw shaft fixing part (806) is provided with corresponding bolt holes; the second nut sleeve (807) is provided with corresponding bolt holes; the slider auxiliary fixing part (808) is provided with corresponding bolt holes; the third slider (809) is provided with corresponding bolt holes; and the second guide rail (810) is provided with corresponding bolt holes.

2. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The third motor (507) and the third motor fixing part (506) are threadedly connected to the integral plate (7) through the reserved groove (701) of the third motor; the fifth gear (509) is fixedly connected to the third motor (507) through the fourth gear shaft (508); the fourth gear (505) and the first helical gear (502) are fixedly connected to the third gear shaft (504) through the gear shaft fixing part (501); the third gear shaft (504) is fixed to the gear shaft fixing part (501) through the reserved stepped shaft; the gear shaft fixing part (501) is threadedly connected to the integral plate (7) through the reserved groove (702) of the gear shaft fixing part.

3. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The second nut sleeve (807) is connected to the second lead screw (804) through a reserved groove; the second helical gear (803), the lead screw rotation fixing part (801), the fifth bearing (805) and the second lead screw fixing part (806) are connected to the second lead screw (804) through a reserved stepped shaft; the lead screw rotation fixing part (801) and the second lead screw fixing part (806) are respectively connected to the integral plate (7) through the vertical motion lead screw rotation fixing part groove (703) and the vertical motion lead screw fixing part groove (704). The third slider (809) is threadedly connected to the slider auxiliary fixing part (812) through the bolt hole; the second guide rail (810) is connected to the third slider (809) through the reserved groove, and then threadedly connected to the overall plate (7) through the reserved groove (705) of the vertical motion guide rail; the support plate (4) is threadedly connected to the slider auxiliary fixing part (808) and the second nut sleeve (807) through the vertical motion device slider bolt hole (401) and the nut sleeve fixing bolt hole (406) respectively.

4. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The first nut sleeve (309) is connected to the nut sleeve auxiliary fixing part (303) and the first screw shaft (304) through bolt holes and reserved grooves respectively; the first screw shaft (304) is connected to the second motor (305), the second motor fixing part (306), the first screw shaft fixing part (307) and the second bearing (308) through reserved stepped shafts; the first guide rail (301) is connected to the second slider (302) through reserved grooves; the first guide rail (301) and the first screw shaft fixing part (307) are threadedly connected to the support plate (4) through the parallel motion device guide rail bolt hole (402); the second slider (302) and the nut sleeve auxiliary fixing part (303) are threadedly connected to the first bottom plate (111) through the parallel motion bolt hole (112).

5. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The first motor mounting component (203) is threadedly connected to the first motor (204) and the right plate (104) through the motor bolt hole and the first motor reserved groove (103) respectively; the first gear (201) is connected to the first motor (204) through the first gear shaft (202); the second gear (205), the first bearing (206) and the third gear (208) are connected to the second gear shaft (207) through the reserved stepped shaft; the first bearing (206) is connected to the gear shaft through the gear shaft hole. (107) is connected to the left plate (105); the rack fastener (210) is threaded to the rack (209) and the left plate (105) respectively through the reserved groove and the rack fastener bolt hole; the left plate (105) is connected to the right plate (104) through the fixing plate (113); the left plate (105) and the right plate (104) are fixedly connected to the first bottom plate (111) through the lower bolt hole (106) of the rack plate and the lower bolt hole (101) of the upper half.

6. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The first slider (215) is engaged with the base plate (224) and the guide shaft (212) via the first guide track (214); the first slider (215) is fixedly connected to the base plate (224) via the first slider bolt hole (216); the rotating block (219) is engaged with the rotating block fixing shaft (222) via the reserved groove and rotates, and is fixed on the rotating block fixing shaft (222) via the second nut (220) and the rotating block fixing shaft thread (221); the base plate (224) is threadedly connected to the rack (209) via the base plate bolt hole (218).

7. The automatic centering and controllable wear angle friction and wear testing device for plunger sleeves as described in claim 1, characterized in that, The sixth gear (606) and the seventh gear (612) are respectively connected to the fifth gear shaft (608) and the sixth gear shaft (613) via reserved stepped shafts; The fifth gear shaft (608) and the sixth gear shaft (613) are engaged with the second bottom plate (605) via the first gear placement shaft (609) and the second gear placement shaft (610); the sixth gear shaft (613) is fixedly connected to the vertical platform (617) via the fixed shaft (614).

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