A seal ring wear resistance test bench

Abstract

This invention discloses a sealing ring wear resistance testing bench, including a main frame. A through groove is formed in the center of the top plate of the main frame. The upper part of the main testing chamber is inserted into the through groove. A horizontal fixing plate is fixed to the top surface of the main testing chamber and to the top surface of the main frame. Multiple placement through holes are formed on the horizontal fixing plate. Multiple testing through holes are formed in the center of the top surface of the main testing chamber. The bottom of each testing through hole communicates with the transmission cavity of the main testing chamber. Multiple transmission gears are movably connected to the transmission cavity via bearings. Each transmission gear is located directly below a corresponding testing through hole. A sleeve is installed in each testing through hole, and a main annular groove is formed on the outer wall of the middle portion of the sleeve. This test bench can simulate the working conditions of a sealing ring and can test multiple sealing rings simultaneously, resulting in good testing performance and high efficiency.

Description

Technical field:

[0001] The invention relates to the technical field of sealing ring testing, and more particularly to a sealing ring wear resistance testing platform. Background technology:

[0002] At present, for the wear resistance test of the sealing ring, it is necessary to make a standard test block during molding and send the sample for testing. The test is divided into two tests: dry grinding and oil grinding. The wear resistance is evaluated according to the wear amount and the width of the wear mark. The test principle is different from the actual working conditions of the sealing ring. The working conditions require the existence of oil pressure, which cannot be provided in the test. The products that pass the test will show early wear when the whole machine is used. It cannot be used for product process control.

[0003] For example, China's patent application number is 201920692057.0, which is a ceramic sealing ring wear resistance testing device with good positioning effect. It can perform working condition testing on a single sealing ring, but it is not operated under oil pressure conditions during the test, so that its test results are different from those in actual working conditions. Summary of the invention:

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a sealing ring wear resistance test bench, which can simulate the working conditions of the sealing ring for testing and can test multiple sealing rings at one time, with good test effect and high efficiency.

[0005] The solution of the present invention to solve the technical problem is:

[0006] A sealing ring wear resistance test bench comprises a main frame, a through groove is formed in the middle of the top plate of the main frame, the upper part of the main detection box body is inserted in the through groove, a horizontal fixing plate is fixed on the top surface of the main detection box body, the horizontal fixing plate is fixed on the top surface of the top plate of the main frame, a plurality of placement through holes are formed on the horizontal fixing plate, a plurality of detection through holes are formed in the middle of the top surface of the main detection box body, the bottom of the detection through hole is communicated with the transmission cavity of the main detection box body, a plurality of transmission gears are movably connected in the transmission cavity through bearings, each transmission gear is located directly below the corresponding detection through hole, a sleeve body is installed in the detection through hole, and the sleeve A main annular groove is formed on the outer wall of the middle part of the cylinder body, an oil inlet hole is formed on the side wall of the detection through hole, the oil inlet hole is communicated with the corresponding main annular groove, a plurality of oil guide through holes are formed on the inner wall of the main annular groove, the oil guide through holes are communicated with the middle through hole of the sleeve body, a detection shaft body is inserted in the middle through hole of the sleeve body, the outer wall of the detection shaft body is close to the inner wall of the corresponding middle through hole of the sleeve body, a plurality of annular oil grooves are formed on the outer wall of the detection shaft body, all of which are communicated with the corresponding oil guide through holes, and sealing ring detection annular grooves are formed on the outer wall of the detection shaft body above and below the annular oil grooves;

[0007] The bottom end of the detection shaft is connected to the transmission gear below, and a driving motor is installed on the bottom surface of the bottom plate of the main detection box body, and the driving motor drives one of the transmission gears to rotate.

[0008] The outer walls of the upper and lower parts of the sleeve body are pressed against the inner walls of the corresponding detection through holes. Annular sealing grooves are formed on the outer walls of the upper and lower parts of the sleeve body. The sealing rings are nested in the annular sealing grooves. The outer walls of the sealing rings are pressed against the inner walls of the detection through holes.

[0009] An upper liquid guiding groove is formed in the middle of the top surface of the main detection box body, and a plurality of detection through holes extending vertically downward are formed on the bottom surface of the upper liquid guiding groove. The top of the sleeve body extends out of the top surface of the detection through holes and is located in the upper liquid guiding groove. A radially extending edge is formed on the outer side wall of the top of the sleeve body, and the radially extending edge is fixedly connected to the bottom surface of the upper liquid guiding groove by bolts;

[0010] An annular mounting groove is formed on the top inner wall of the middle through hole of the sleeve body, the outer ring of the first bearing is clamped on the inner wall of the annular mounting groove, the top outer wall of the detection shaft body is tightly attached to the inner wall surface of the inner ring of the first bearing, and a radially extending annular edge is formed on the top outer wall of the detection shaft body, and the annular edge is pressed against the top surface of the inner ring of the first bearing.

[0011] An oil return hole extending downward is formed in the middle of the top surface of the detection shaft body, an oil return annular groove is formed on the outer wall of the detection shaft body between two adjacent sealing ring detection annular grooves of the detection shaft body, and a radial through hole is formed on the inner wall of the oil return annular groove. The radial through hole is communicated with the corresponding oil return hole, and the top of the oil return hole is communicated with the upper liquid guide groove.

[0012] The oil return annular groove is located on the outer side wall of the detection shaft body between two corresponding adjacent oil guide through holes.

[0013] A liquid return vertical hole is formed on the bottom surface of one side of the upper liquid guiding groove, and a liquid return connecting hole extending inward is formed on the outer side wall of the corresponding side of the main detection box, and the liquid return connecting hole is communicated with the liquid return vertical hole.

[0014] The left and right parts of the top surface of the horizontal fixed plate are fixed with long guide strips extending forward and backward, and the lower parts of the relative walls of the two long guide strips are formed with side slots extending forward and backward, and the upper support frame is placed on the top surface of the horizontal fixed plate, and the bottom outer walls of the left and right side plates of the upper support frame are formed with raised portions, which are inserted into the side slots, and the top surface of the raised portions is close to the top surface of the corresponding side slots, and a plurality of vertical screw-connected through holes are formed on the transverse beam of the upper support frame, and the vertical screws are screwed in the corresponding vertical screw-connected through holes, and the bottom ends of the vertical screws extend out of the bottom surface of the transverse beam of the upper support frame and are movably connected with a cover plate, the bottom surface of the cover plate is pressed against the top surface of the horizontal fixed plate, and a raised covering portion is formed in the middle part of the bottom surface of the cover plate, which is inserted into the corresponding placement through hole, and the raised covering portion covers the corresponding placement through hole, and the outer side wall of the raised covering portion is close to or close to the inner side wall of the placement through hole.

[0015] A sealing annular groove is formed on the bottom surface of the edge of the cover plate, a bottom sealing ring is nested in the sealing annular groove, and the bottom surface of the bottom sealing ring is nested in an upper annular groove formed on the top surface of the horizontal fixing plate.

[0016] The outstanding effects of the present invention are:

[0017] Compared with the prior art, the invention can simulate the working conditions of the sealing ring to carry out the test, and can test a plurality of sealing rings at one time, and has good test effect and high efficiency.

[0018] And it is easy to disassemble and install. Description of the drawings:

[0019] Figure 1 It is a partial structural schematic diagram of the present invention;

[0020] Figure 2 yes Figure 1 A partial enlarged view of

[0021] Figure 3 yes Figure 2 A partial enlarged view of

[0022] Figure 4 It is a partial side view of the present invention. Specific implementation method:

[0023] For example, see Figures 1 to 4As shown, a sealing ring wear resistance test bench comprises a main frame 10, a through groove 11 is formed in the middle of the top plate of the main frame 10, the upper part of the main detection box 20 is inserted into the through groove 11, the upper outer wall of the main detection box 20 is close to the inner wall of the through groove 11, a horizontal fixing plate 12 is fixed to the top surface of the main detection box 20, the edge of the horizontal fixing plate 12 is fixed to the top surface of the top plate of the main frame 10, a plurality of placement through holes 13 are formed on the horizontal fixing plate 12, an upper liquid guiding groove 25 is formed in the middle of the top surface of the main detection box 20, and a plurality of detection through holes 21 extending vertically downward are formed on the bottom surface of the upper liquid guiding groove 25, the detection through holes 21 correspond one-to-one to the placement through holes 13, and in this embodiment, three detection through holes 21 correspond one-to-one to three placement through holes 13.

[0024] The bottom surface of the main detection box 20 is formed with a transmission cavity 22 extending upward, and a lower cover is fixed to the bottom surface of the main detection box 20. A sealing ring is sandwiched between the top edge of the lower cover and the bottom edge of the main detection box 20; the transmission cavity 22 is connected to the bottom of the detection through hole 21;

[0025] A plurality of transmission gears 23 (three transmission gears 23 in this embodiment) are movably connected in the transmission cavity 22 through bearings. Each transmission gear 23 is located directly below the corresponding detection through hole 21. The lower part of the transmission gear 23 is movably connected to the lower cover plate through bearings, and the upper part of the transmission gear 23 is movably connected to the upper part of the transmission cavity 22 through bearings; the outer teeth of each two adjacent transmission gears 23 are meshed with each other.

[0026] A sleeve body 24 is installed in the detection hole 21, and the upper and lower outer side walls of the sleeve body 24 are pressed against the corresponding inner side walls of the detection hole 21. Annular sealing grooves are formed on the upper and lower outer side walls of the sleeve body 24, and the sealing ring is nested in the annular sealing groove. The outer side wall of the sealing ring is pressed against the inner side wall of the detection hole 21.

[0027] A main annular groove 241 is formed on the outer wall of the middle part of the sleeve body 24, and an oil inlet hole 250 is formed on the side wall of the detection through hole 21. One end of the oil inlet hole 250 is connected to the corresponding main annular groove 241, and the other end extends out of the outer wall of the main detection box body 20 and is connected to the oil inlet pipe.

[0028] The oil inlet hole 250 is communicated with the corresponding main annular groove 241, and a plurality of oil guide holes 242 are formed on the inner side wall of the main annular groove 241, and the oil guide holes 242 are communicated with the middle through hole of the sleeve body 24, and a detection shaft body 30 is inserted in the middle through hole of the sleeve body 24, and the outer side wall of the detection shaft body 30 is close to the inner side wall of the corresponding middle through hole of the sleeve body 24, and a plurality of annular oil grooves 31 are formed on the outer side wall of the detection shaft body 30, and all the annular oil grooves 31 are communicated with the corresponding oil guide through holes 242, and sealing ring detection annular grooves 32 are formed on the outer side wall of the detection shaft body 30 at the upper and lower parts of the annular oil grooves 31;

[0029] The bottom end of the detection shaft body 30 is connected to the transmission gear 23 below, and a transition sleeve is fixed to the middle bottom surface of the lower cover plate of the main detection box body 20, and an intermediate transition shaft is movably connected in the transition sleeve through a bearing, and the top spline shaft of the intermediate transition shaft passes through the middle through hole of the lower cover plate and is inserted into the corresponding middle spline through hole of the transmission gear 23 and cooperates with the middle spline through hole, and a motor seat is fixed to the bottom end of the transition sleeve, and a driving motor 40 is fixed to the bottom surface of the motor seat, and the bottom end of the intermediate transition shaft extends out of the bottom surface of the transition sleeve and is connected to the output shaft of the driving motor 40 through a coupling.

[0030] Furthermore, the top of the sleeve body 24 extends out of the top surface of the detection through hole 21 and is located in the upper liquid guiding groove 25. A radially extending edge 245 is formed on the top outer side wall of the sleeve body 24. The radially extending edge 245 is fixedly connected to the bottom surface of the upper liquid guiding groove 25 by bolts.

[0031] An annular mounting groove is formed on the top inner wall of the middle through hole of the sleeve body 24, and the first bearing 1 is installed in the annular mounting groove. The outer ring of the first bearing 1 is clamped on the inner wall of the annular mounting groove. The top outer wall of the detection shaft body 30 is tightly attached to the inner wall surface of the inner ring of the first bearing 1. A radially extending annular edge 33 is formed on the top outer wall of the detection shaft body 30, and the annular edge 33 is pressed against the top surface of the inner ring of the first bearing 1.

[0032] Furthermore, a downwardly extending oil return hole 34 is formed in the middle of the top surface of the detection shaft body 30, and an oil return annular groove 35 is formed on the outer wall of the detection shaft body 30 between two adjacent sealing ring detection annular grooves 32 of the detection shaft body 30, and a radial through hole 36 is formed on the inner wall of the oil return annular groove 35. The radial through hole 36 is communicated with the corresponding oil return hole 34, and the top of the oil return hole 34 is communicated with the upper liquid guide groove 25.

[0033] Furthermore, the oil return annular groove 35 is located on the outer side wall of the detection shaft body 30 between two corresponding adjacent oil guide holes 242 .

[0034] Furthermore, a liquid return vertical hole 27 is formed on the bottom surface of one side of the upper liquid guide groove 25, and a liquid return connection hole 28 extending inward is formed on the outer wall of the corresponding side of the main detection box 20, and the liquid return connection hole 28 is connected to the liquid return vertical hole 27. The liquid return connection hole 28 is connected to the oil return pipe (not shown in the drawings). The bottom end of the liquid return vertical hole 27 is connected to the transmission cavity 22.

[0035] Furthermore, the left and right parts of the top surface of the horizontal fixed plate 12 are fixed with long guide strips 121 extending forward and backward, and the lower parts of the opposite walls of the two long guide strips 121 are formed with side slots extending forward and backward. The upper support frame 60 is placed on the top surface of the horizontal fixed plate 12, and the bottom outer walls of the left and right side plates of the upper support frame 60 are formed with protrusions 61, which are inserted into the side slots, and the top surface of the protrusion 61 is close to the top surface of the corresponding side slot, and the bottom surface of the protrusion 61 is pressed against the top surface of the horizontal fixed plate 12, and a plurality of vertical screw-connected through holes are formed on the transverse beam of the upper support frame 60. The vertical screw 62 is screwed in the corresponding vertical screw-connected through hole, the top end of the vertical screw 62 extends out of the top surface of the transverse beam of the upper support frame 60 and is fixed with a handwheel, the bottom end of the vertical screw 62 extends out of the bottom surface of the transverse beam of the upper support frame 60 and is movably connected with a cover plate 63, the bottom surface of the cover plate 63 is pressed against the top surface of the horizontal fixing plate 12, and a raised covering portion 631 is formed in the middle part of the bottom surface of the cover plate 63, the raised covering portion 631 is inserted into the corresponding placement through hole 13, the raised covering portion 631 covers the corresponding placement through hole 13, and the outer side wall of the raised covering portion 631 is close to or close to the inner side wall of the placement through hole 13. A limiting guide sleeve is fixed in the middle of the bottom surface of the raised covering portion 631, and the bottom surface of the limiting guide sleeve is close to the top surface of the detection shaft 30. When the oil sprays up from the top of the oil return hole 34, it can be sprayed into the limiting guide sleeve to produce a buffering effect, thereby stabilizing the subsequent oil return.

[0036] A plurality of locking screw through holes are formed on the top surface of the side slot, and the screw portion of the locking bolt is screwed into the corresponding locking screw through holes. The bottom end of the screw portion of the locking bolt extends into the side slot and presses against the top surface of the corresponding protrusion 61 to achieve locking.

[0037] Furthermore, a sealing annular groove is formed on the bottom surface of the edge of the cover plate 63 , the bottom sealing ring 3 is nested in the sealing annular groove, and the bottom surface of the bottom sealing ring 3 is nested in the upper annular groove formed on the top surface of the horizontal fixing plate 12 .

[0038] A hydraulic station 100 is also fixed on the main frame 10, and an oil pump is fixed on the hydraulic station 100. A control valve is installed on the oil pump. One end of the oil inlet pipe is connected to the liquid outlet end of the control valve, and one end of the oil return pipe extends into the oil tank of the hydraulic station. A vertical plate is fixed on the top surface of the top plate of the main frame 10, and multiple pressure gauges 9 are installed on the vertical plate. Each pressure gauge 9 corresponds to an oil inlet pipe, and the detection end of the pressure gauge 9 is connected to the corresponding oil inlet pipe through a connecting pipe. A control host is fixed on the vertical plate, and the control host is electrically connected to all electronic control components. A control button is installed on the control host. The above are all conventional structures and will not be described in detail here. The oil circuit connecting pipes and electrical connecting lines are omitted and not shown in the accompanying drawings.

[0039] When the present embodiment is used, the sealing ring to be detected is first nested in the sealing ring detection annular groove 32 on the detection shaft body 30, and then the detection shaft body 30 is inserted into the corresponding sleeve body 24, and the outer wall of the sealing ring to be detected is close to the inner wall of the corresponding sleeve body 24. The bottom end of the detection shaft body 30 is a spline shaft, which is inserted into the middle spline connection hole of the corresponding transmission gear 23 below and cooperates with it. At this time, the top outer wall of the detection shaft body 30 is close to the inner wall surface of the inner ring of the first bearing 1, and the annular edge 33 is pressed against On the top surface of the inner ring of the first bearing 1, then, move the upper support frame 60 forward so that all the cover plates 63 move to the top of the corresponding placement through holes 13, turn all the hand wheels to rotate the vertical screw 62, so that the bottom surface of the cover plate 63 is pressed against the top surface of the horizontal fixing plate 12, and the raised covering part 631 covers the corresponding placement through hole 13, and the outer wall of the raised covering part 631 is close to or close to the inner wall of the placement through hole 13 to achieve covering, and at the same time, tighten all the locking bolts to fix the upper support frame 60 and prevent it from moving.

[0040] Then, press the relevant button of the control host to start the oil pump and open the control valve to allow the oil to flow from the oil inlet pipe into the corresponding main annular groove 241, and then enter the annular oil groove 31 of the detection shaft body 30 from the oil guide hole 242. At this time, the oil pressure status at the corresponding detection shaft body 30 can be known at all times through the corresponding pressure gauge 9, and the oil pressure flow can be adjusted through the control valve, thereby controlling the oil pressure so that it meets the working oil pressure status.

[0041] Then, by driving the motor 40, the corresponding transmission gear 23 is rotated, and it is driven to rotate with all the transmission gears 23, so that all the detection shaft bodies 30 are rotated, so that the operation of the sealing ring to be detected thereon in the working condition can be detected. During the operation, the sealing ring will rub, so that a gap is generated between the outer wall of the sealing ring and the inner wall of the inner wall of the sleeve body 24. At this time, the oil will leak from here and enter the corresponding oil return annular groove 35, and then enter the corresponding oil return hole 34 through the radial through hole 36. After the oil accumulates in the oil return hole 34, it enters the upper liquid guide groove 25 from its top, and then enters the liquid return vertical hole 27, and then enters the oil return pipe through the liquid return connecting hole 28, and finally flows back To the oil tank (it first enters the filtering device in the oil tank for filtration, which adopts filter element filtration, which is a conventional structure and will not be described in detail here, and then enters the interior of the oil tank) to realize the circulation of the oil. After running the specified test time, all components are stopped by the control button, and then all the locking bolts are loosened, and the hand wheel is turned to lift and remove the raised covering part 631 from the corresponding placement through hole 13, and then the upper support frame 60 is pushed backward to the rear, and all the detection shaft bodies 30 are pulled out, and then the sealing ring on it is taken out or the wear condition of the sealing ring is directly inspected on it to see if it meets the requirements. The test effect is good, and multiple sealing rings can be inspected at one time, and the test is carried out by simulating the working conditions of the sealing ring, and the test results are reliable, accurate and effective.

[0042] A cooling fan may be installed at the bottom of the main frame 10, with its air outlet facing the main detection box 20 to cool it. The cooling fan is a conventional structure and is not shown in the drawings.

[0043] When the detection shaft 30 is pulled out, part of the oil inside it will flow back into the transmission cavity 22, and the bottom end of the return liquid vertical hole 27 is connected to the transmission cavity 22, and the oil in the transmission cavity 22 can also flow back through the return oil pipe.

[0044] Among them, sealing devices are installed between the lower cover plate, transition sleeve, intermediate transition shaft and other components of the main detection box 20 to prevent the oil in the transmission cavity 22 from leaking (the sealing device is a conventional equipment structure and will not be described in detail here).

Claims

1. A sealing ring wear resistance test bench, comprising a main frame (10), characterized in that: A through groove (11) is formed in the middle of the top plate of the main frame (10), the upper part of the main detection box (20) is inserted into the through groove (11), a horizontal fixing plate (12) is fixed on the top surface of the main detection box (20), the horizontal fixing plate (12) is fixed on the top surface of the top plate of the main frame (10), a plurality of placement through holes (13) are formed on the horizontal fixing plate (12), a plurality of detection through holes (21) are formed in the middle of the top surface of the main detection box (20), the bottom of the detection through hole (21) is communicated with the transmission cavity (22) of the main detection box (20), a plurality of transmission gears (23) are movably connected in the transmission cavity (22) through bearings, each transmission gear (23) is located directly below the corresponding detection through hole (21), a sleeve body (24) is installed in the detection through hole (21), and a sleeve body (24) is provided on the middle outer wall of the sleeve body (24). A main annular groove (241) is formed, an oil inlet hole (250) is formed on the side wall of the detection through hole (21), the oil inlet hole (250) is communicated with the corresponding main annular groove (241), a plurality of oil guide through holes (242) are formed on the inner side wall of the main annular groove (241), the oil guide through holes (242) are communicated with the middle through hole of the sleeve body (24), a detection shaft body (30) is inserted in the middle through hole of the sleeve body (24), the outer side wall of the detection shaft body (30) is close to the inner side wall of the middle through hole of the corresponding sleeve body (24), a plurality of annular oil grooves (31) are formed on the outer side wall of the detection shaft body (30), all the annular oil grooves (31) are communicated with the corresponding oil guide through holes (242), and sealing ring detection annular grooves (32) are formed on the outer side walls of the detection shaft body (30) at the upper and lower parts of the annular oil grooves (31); The bottom end of the detection shaft (30) is connected to the transmission gear (23) below, and a driving motor (40) is installed on the bottom surface of the bottom plate of the main detection box (20), and the driving motor (40) drives one of the transmission gears (23) to rotate; The outer side walls of the upper and lower parts of the sleeve body (24) are pressed against the inner side walls of the corresponding detection through hole (21), and an annular sealing groove is formed on the outer side walls of the upper and lower parts of the sleeve body (24), and the sealing ring is nested in the annular sealing groove, and the outer side wall of the sealing ring is pressed against the inner side wall of the detection through hole (21); An upper liquid guiding groove (25) is formed in the middle of the top surface of the main detection box (20), and a plurality of detection through holes (21) extending vertically downward are formed on the bottom surface of the upper liquid guiding groove (25); the top of the sleeve body (24) extends out of the top surface of the detection through holes (21) and is located in the upper liquid guiding groove (25); a radially extending edge (245) is formed on the outer side wall of the top of the sleeve body (24), and the radially extending edge (245) is fixedly connected to the bottom surface of the upper liquid guiding groove (25) by bolts; An annular mounting groove is formed on the top inner side wall of the middle through hole of the sleeve body (24), the outer ring of the first bearing (1) is clamped on the inner side wall of the annular mounting groove, the top outer side wall of the detection shaft body (30) is tightly attached to the inner wall surface of the inner ring of the first bearing (1), and a radially extending annular edge (33) is formed on the top outer side wall of the detection shaft body (30), and the annular edge (33) is pressed against the top surface of the inner ring of the first bearing (1); An oil return hole (34) extending downward is formed in the middle of the top surface of the detection shaft body (30); an oil return annular groove (35) is formed on the outer wall of the detection shaft body (30) between two adjacent sealing ring detection annular grooves (32) of the detection shaft body (30); a radial through hole (36) is formed on the inner wall of the oil return annular groove (35); the radial through hole (36) is in communication with the corresponding oil return hole (34); and the top of the oil return hole (34) is in communication with the upper liquid guide groove (25).

2. A seal ring wear resistance test bench according to claim 1, characterized in that: The oil return annular groove (35) is located on the outer side wall of the detection shaft body (30) between two corresponding adjacent oil guide through holes (242).

3. The seal ring wear resistance test bench according to claim 1, characterized in that: A liquid return vertical hole (27) is formed on the bottom surface of one side of the upper liquid guide groove (25), and a liquid return connection hole (28) extending inward is formed on the outer wall of the corresponding side of the main detection box (20), and the liquid return connection hole (28) is in communication with the liquid return vertical hole (27).

4. The seal ring wear resistance test bench according to claim 1, characterized in that: Long guide strips (121) extending forward and backward are fixed to the left and right parts of the top surface of the horizontal fixed plate (12), and side slots extending forward and backward are formed at the lower parts of the opposite walls of the two long guide strips (121). The upper support frame (60) is placed on the top surface of the horizontal fixed plate (12), and the bottom outer walls of the left and right side plates of the upper support frame (60) are formed with protrusions (61), which are inserted into the side slots, and the top surfaces of the protrusions (61) are close to the top surfaces of the corresponding side slots. A plurality of vertical screw-connected through holes are formed on the transverse beams of the upper support frame (60). The screw rod (62) is screwed into the corresponding vertical screw-connected through hole. The bottom end of the vertical screw rod (62) extends out of the bottom surface of the transverse beam of the upper support frame (60) and is movably connected with a cover plate (63). The bottom surface of the cover plate (63) is pressed against the top surface of the horizontal fixing plate (12). A raised covering portion (631) is formed in the middle of the bottom surface of the cover plate (63). The raised covering portion (631) is inserted into the corresponding placement through hole (13). The raised covering portion (631) covers the corresponding placement through hole (13). The outer side wall of the raised covering portion (631) is in close contact with or close to the inner side wall of the placement through hole (13).

5. The seal ring wear resistance test bench according to claim 4, characterized in that: The bottom surface of the edge of the cover plate (63) is formed with a sealing annular groove, the bottom sealing ring (3) is nested in the sealing annular groove, and the bottom surface of the bottom sealing ring (3) is nested in the upper annular groove formed on the top surface of the horizontal fixing plate (12).

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