CN209164244U - A reciprocating sealing device to study the effect of piston rod eccentricity on the performance of seals - Google Patents

Abstract

A kind of reciprocating sealing device that research piston rod bias influences property of sealing piece, including sealing element test macro, eccentric adjustment system, left reciprocating drive, right reciprocating drive, hydraulic power unit and pedestal；Pull pressure sensor, cylinder barrel, left end cap, right end cap and the bolt that sealing element test macro includes piston rod, is connected on the left and right both ends of piston rod, cylinder barrel and left end cap and right end cap are linked together by bolt, mounting base, static seal, sealing element to be measured and guide ring are respectively arranged on left and right end cap, left and right pull pressure sensor is connected with left and right reciprocating drive respectively, measures the frictional force of left and right sealing element to be measured respectively；Eccentric adjustment system includes supporting plate, forward and backward bracket and eight micrometer calipers for being distributed in four angles of front and back support or more, the non-horizontal adjusting in the left and right that supporting plate can be achieved by the fine tuning of micrometer caliper and the angular beat in front and back are adjusted, and the circumferential compression ratio of the bias and sealing element to be measured of realizing piston rod is inconsistent.

Description

A reciprocating sealing device to study the effect of piston rod eccentricity on the performance of seals

technical field

The utility model relates to the technical field of rubber-plastic reciprocating sealing, in particular to a reciprocating sealing device for studying the influence of piston rod eccentricity on the performance of sealing parts.

Background technique

Rubber-plastic reciprocating seals are the key tribological components of many equipment such as aviation actuators and engineering hydraulic cylinders, which play a role in preventing the leakage of the sealed medium and ensuring the efficiency of the system. With the development of equipment to high parameters such as high reciprocating speed and high sealing medium pressure, and the emergence of extreme working conditions, the challenges faced by rubber and plastic reciprocating seals are also increasing. Among them, cases of failures such as O-rings caused by the rolling or twisting of the sealing ring in the groove are frequently reported. According to engineering practice experience, the eccentricity of the piston rod caused by improper installation or machining error is one of the reasons for the above phenomenon.

There have been many studies on the eccentricity of the piston rod in the rubber and plastic rotary seals, and scholars have also designed relevant test benches to carry out the eccentricity research of the rubber and plastic seals. However, at present, there are few reports on the performance of rubber-plastic reciprocating seals under the operating conditions of piston rod eccentricity. Although a small number of scholars have carried out theoretical analysis on related aspects, they have not found relevant experimental bench designs to study the effect of piston rod eccentricity in detail. Effects of reciprocating seal performance.

SUMMARY OF THE INVENTION

The utility model aims to overcome the above shortcomings of the prior art, and provides a reciprocating sealing device for studying the influence of the eccentricity of the piston rod on the performance of the sealing element, which can realize the measurement of the average friction force and leakage of the sealing element, and the observation of the movement behavior of the sealing ring. and detection of oil temperature changes.

The technical scheme of the present utility model is:

A reciprocating sealing device for studying the effect of piston rod eccentricity on the performance of a seal, comprising an experimental performance testing system 100, a left reciprocating drive system 200, a right reciprocating drive system 300, a hydraulic pump station 400 and a base 500; it is characterized in that: the The experimental performance test system 100 includes a seal test system 150 and an eccentric adjustment system 160; the seal test system 150 includes a left pull pressure sensor 101 connected to the first reciprocating connecting rod 240 of the left reciprocating drive system 200, and is connected to the left pull pressure sensor 101. The piston rod 110 connected to the sensor 101, the right pull pressure sensor 102 connected to the second reciprocating connecting rod 330 of the right reciprocating drive system 300, and the L-shaped angle bracket 105 fixed on the support plate 130 through the second screw 107, through the first The left end cover 118 and the right end cover 125 are connected with the L-shaped angle bracket 105 by the screw 106, the first seal mounting seat 115 is connected with the left end cover 118 by the fourth screw 129, and the second end cover is connected with the right end cover 125 by the third screw 122. The seal mounting seat 127, the cylinder 119 connected to the left end cover 118 and the right end cover 125 through the first nut 103 and the stud bolt 104, and the plug 108 connected to the cylinder 119; the cylinder 119 is matched with the left end cover 118 The second static seal 113 is used to seal the cylinder 119, and the third static seal 123 is used to seal the joint between the cylinder 119 and the right end cover 125 to prevent the leakage of high-pressure oil in the hydraulic cylinder; the cylinder 119 is provided with an oil inlet 120 and The oil outlet 117; the first static seal 112 is used to seal the place where the first seal mounting seat 115 and the left end cover 118 cooperate, and the fourth static seal 124 is used to seal the place where the second seal mounting seat 127 and the right end cover 125 cooperate. ; The first seal mounting seat 115 and the piston rod 110 are fitted with the left seal 116 to be sealed, the first guide ring 114 is guided, and the second seal mounting seat 127 is fitted with the piston rod 110. The right seal to be tested 121 is sealed and guided by the second guide ring 126; the first seal mounting seat 115 is provided with a left leakage oil collection hole 111, and the second seal mounting seat 127 is provided with a right leakage oil collection hole hole 128; the piston rod 110 passes through the first seal mounting seat 115, the left end cover 118, the cylinder 119, the right end cover 125 and the second seal mounting seat 127 in sequence and is connected to the right pull pressure sensor 102;

The eccentric adjustment system 160 includes a rear bracket 167 connected to the base 500 through an eleventh screw 177 and a twelfth screw 178 , and a front bracket 172 connected to the base 500 through a fifth screw 162 and a sixth screw 166 , the first spiral micrometer 161, the third spiral micrometer 164, the fifth spiral micrometer 169 and the seventh spiral micrometer 173 connected to the rear bracket 167, the second spiral micrometer connected to the front bracket 172 Micrometer 163, fourth spiral micrometer 165, sixth spiral micrometer 171 and eighth spiral micrometer 175, the seventh screw 168 and the ninth screw 174 connected to the rear bracket 167, connected to the front bracket The eighth screw 170 and the tenth screw 176 on 172; the seventh screw 168, the eighth screw 170, the ninth screw 174 and the tenth screw 176 are used to constrain the movement of the support plate 130 along the movement direction of the piston rod; the The first spiral micrometer 161, the second spiral micrometer 163, the third spiral micrometer 164 and the fourth spiral micrometer 165 are in contact with the lower bottom surface of the support plate 130, the fifth spiral micrometer 169, the sixth spiral micrometer The spiral micrometer 171 , the seventh spiral micrometer 173 and the eighth spiral micrometer 175 are in contact with the upper surface of the support plate 130 ; the first spiral micrometer 161 , the second spiral micrometer 163 , the The third helix 164, the fourth helix 165, the fifth helix 169, the sixth helix 171, the seventh helix 173 and the eighth helix 175 are precessed or Rotate out to adjust the up and down movement or inclination of the support plate 130, so as to realize the eccentric adjustment of the overall structure of the seal testing system 150;

The left reciprocating drive system 200 includes a base 500, a first electric cylinder 220 fixed on the base 500, a first connection flange 230 connected with the extension shaft of the first electric cylinder 220, and fixed on the first connection flange The first reciprocating connecting rod 240 at the right end of 230;

The right reciprocating drive system 300 includes a second electric cylinder 310 fixed on the base 500 , a second connection flange 320 connected with the extension shaft of the second electric cylinder 310 , and a second connection flange 320 fixed on the right end of the second connection flange 320 . Two reciprocating connecting rods 330;

The hydraulic pump station 400 includes a hydraulic oil tank 401, a liquid level gauge 402 and a thermometer 415 installed inside the hydraulic oil tank 401, a gear oil pump 405 connected from the hydraulic oil tank 401, and a coupling 416 connected to the gear oil pump 405 to drive the coupling. The motor 404 that the shaft 416 rotates, the one-way valve 407 connected to the gear oil pump 405, the first stop valve 409 installed at the outlet of the one-way valve 407, the main pressure gauge 408 connected to the first stop valve 409, and the one-way valve Relief valve 406 connected to 407, cooling fan 403 connected to the outlet of relief valve 406, reversing valve 410 connected to the outlet of check valve 407, first hydraulic control check valve 411 connected to reversing valve 410 and the second hydraulically controlled check valve 417, the electric contact pressure gauge 414 connected to the outlet of the second hydraulically controlled check valve 417, the bladder-type accumulator 413 connected to the electric contact pressure gauge 414, and the bladder-type accumulator The second stop valve 412 connected to the valve 413; the oil outlet 117 of the cylinder 119 of the first hydraulic control check valve 411 is connected; the oil inlet 120 of the cylinder 119 of the second hydraulic control check valve 417 is connected; The high pressure oil flowing back from the left hydraulic control check valve 311 is cooled by the cooling fan 403 and then flows back to the hydraulic oil tank 301 .

Further, the left end cover 118 , the first seal mounting seat 115 or the right end cover 125 , and the second seal mounting seat 127 are made of transparent materials, so as to observe the twisting or rolling phenomenon of the seal caused by eccentricity.

The working principle of the present utility model:

The utility model provides a reciprocating sealing device for studying the influence of the eccentricity of a piston rod on the performance of a seal, including a seal testing system, an eccentric adjustment system, a left reciprocating drive system, a right reciprocating drive system, a hydraulic pump station and a base. During the experiment, the hydraulic pump station provides a high-pressure environment for the experimental cylinder, and the left reciprocating drive system and the right reciprocating drive system drive the piston rod to perform linear reciprocating motion through the left pull pressure sensor and the right pull pressure sensor, respectively. Among them, when the left reciprocating drive system provides pulling force to the left pull pressure sensor, the right reciprocating drive system provides thrust to the right pull pressure sensor; and when the left reciprocating drive system provides thrust to the left pull pressure sensor, the right reciprocating drive system provides the right pull force. A pressure sensor provides tension. In the experiment, the left and right seals to be tested were not installed without oil pressure, and the readings of the left-pull pressure sensor and the right-pull pressure sensor during the back and forth movement of the piston rod were recorded, among which the left-pull pressure sensor The difference between the pressure sensor and the right pull pressure sensor is the friction value of the guide ring in the process or return state. Then load the left seal to be tested and the right seal to be tested under pressure, repeat the above process, record the readings of the two sensors, and subtract the friction of the guide ring to obtain the left seal to be tested or the right to be tested The average friction value of the seal under return and progress. In addition, the leakage amounts of the left seal to be tested and the right seal to be tested can also be obtained by collecting the oil flowing out from the left leakage oil collecting hole and the right leakage oil collecting hole. The adjustment of the eccentricity parameters of the piston rod is realized by changing the contact position of the left seal to be tested or the right seal to be tested and the piston rod. Specifically, it is divided into parallel eccentricity adjustment and angular deflection adjustment. The parallel eccentric adjustment is to realize the upward or downward movement of the pallet by adjusting the screw-in or unscrew amount of the eight helical micrometers at the same time. The screw-in or screw-out amount of the four helical micrometers on one side of the reciprocating drive system realizes that the top surface of the pallet forms a certain angle with the central axis of the piston rod.

The beneficial effects of the present utility model are mainly manifested in:

The radial movement of the piston rod is restricted by the left reciprocating drive system and the right reciprocating drive system, and eight helical micrometers are used to realize the difference between the position of the seal to be tested and the piston rod, which can well study the parallel eccentricity and angular deviation The influence of two eccentric modes of pendulum on the performance of rubber-plastic reciprocating seals is a more valuable experimental device for researchers to study the influence of piston rod eccentricity.

Description of drawings

FIG. 1 is an overall view of the test system of the present invention.

FIG. 2 is a schematic perspective view of the structure of the left and right reciprocating drive systems and the experimental performance testing system of the present invention.

3 is a schematic perspective view of the structure of the seal testing system of the present invention.

FIG. 4 is a cross-sectional view of the structure of the seal testing system of the present invention.

FIG. 5 is a schematic perspective view of the structure of the eccentric adjustment system of the present invention.

Figure 6 is a cross-sectional view of the structure of the eccentric adjustment system of the present invention

Fig. 7 is the oil circuit diagram of the hydraulic pump station of the present invention.

Detailed ways

The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6 and Figure 7, wherein:

100-experimental performance test system; 101-left-pull pressure sensor; 102-right-pull pressure sensor; 103-first nut; 104-stud bolt; 105-L-shaped angle frame; 106-first screw; 107-second Screw; 108-plug; 109-temperature hole; 110-piston rod; 111-left leakage oil collection hole; 112-first static seal; 113-second static seal; 114-first guide ring; 115-first seal mounting seat; 116-left seal to be tested; 117-oil outlet; 118-left end cover; 119-cylinder; 120-oil inlet; 121-right seal to be tested; 122-first Three screws; 123-third static seal; 124-fourth static seal; 125-right end cover; 126-second guide ring; 127-second seal mounting seat; 128-right leakage oil collection hole; 129 -4th screw; 130-plate; 150-seal test system; 160-eccentric adjustment system; 161-first screw micrometer; 162-fifth screw; 163-second screw micrometer; Three helix micrometer; 165-fourth helix micrometer; 166-sixth screw; 167-rear bracket; 168-seventh screw; 169-fifth helix micrometer; 170-eighth screw; 171-th Six-spiral micrometer; 172-front bracket; 173-seventh screw-micrometer; 174-ninth screw; 175-eighth screw-micrometer; 176-tenth screw; 177-eleventh screw; 178- 12th screw; 200-left reciprocating drive system; 220-first electric cylinder; 230-first connecting flange; 240-first reciprocating connecting rod; 300-right reciprocating drive system;310-second electric cylinder;320 -Second connecting flange; 330-Second reciprocating connecting rod; 400-Hydraulic pump station; 401-Hydraulic oil tank; 402-Liquid level gauge; 403-Cooling fan; 404-Motor; valve; 407-check valve; 408-main pressure gauge; 409-first globe valve; 410-reversing valve; 411-first hydraulic control check valve; 412-second globe valve; 413-bladder accumulator 414-electric contact pressure gauge; 415-thermometer; 416-coupling; 417-second hydraulic control check valve; 500-base.

The reciprocating sealing device of the utility model, which studies the influence of the eccentricity of the piston rod on the performance of the sealing element, comprises a sealing element testing system, an eccentric adjusting system, a left reciprocating driving system, a right reciprocating driving system, a hydraulic pump station and a base; the sealing element testing system includes The piston rod, the tension pressure sensor connected to the left and right ends of the piston rod, the cylinder barrel, the left end cover, the right end cover and the bolts. The cylinder barrel is connected with the left end cover and the right end cover by bolts. All are equipped with a mounting seat, a static seal, a seal to be tested and a guide ring. The left and right pull pressure sensors are connected to the left and right reciprocating drive systems, respectively, to measure the friction force of the left and right seals to be tested; eccentricity The adjustment system includes the support plate, the front and rear brackets, and eight spiral micrometers distributed on the upper and lower corners of the front and rear brackets. , the eccentricity of the piston rod and the circumferential compression rate of the seal to be tested are inconsistent.

A reciprocating sealing device for studying the effect of piston rod eccentricity on the performance of a seal, comprising an experimental performance testing system 100, a left reciprocating drive system 200, a right reciprocating drive system 300, a hydraulic pump station 400 and a base 500; it is characterized in that: the The experimental performance test system 100 includes a seal test system 150 and an eccentric adjustment system 160; the seal test system 150 includes a left pull pressure sensor 101 connected to the first reciprocating connecting rod 240 of the left reciprocating drive system 200, and is connected to the left pull pressure sensor 101. The piston rod 110 connected to the sensor 101, the right pull pressure sensor 102 connected to the second reciprocating connecting rod 330 of the right reciprocating drive system 300, and the L-shaped angle bracket 105 fixed on the support plate 130 through the second screw 107, through the first The left end cover 118 and the right end cover 125 are connected with the L-shaped angle bracket 105 by the screw 106 , the first seal mounting seat 115 is connected with the left end cover 118 by the fourth screw 129 , and the second end cover is connected with the right end cover 125 by the third screw 122 The seal mounting seat 127, the cylinder 119 connected to the left end cover 118 and the right end cover 125 through the first nut 103 and the stud bolt 104, and the plug 108 connected to the cylinder 119; the cylinder 119 is matched with the left end cover 118 The second static seal 113 is used to seal the cylinder 119, and the third static seal 123 is used to seal the joint between the cylinder 119 and the right end cover 125 to prevent the leakage of high-pressure oil in the hydraulic cylinder; the cylinder 119 is provided with an oil inlet 120 and The oil outlet 117; the first static seal 112 is used to seal the place where the first seal mounting seat 115 and the left end cover 118 cooperate, and the fourth static seal 124 is used to seal the place where the second seal mounting seat 127 and the right end cover 125 cooperate. ; The first seal mounting seat 115 and the piston rod 110 are fitted with the left sealing member 116 to be sealed and the first guide ring 114 is guided, and the second sealing member mounting seat 127 is fitted with the piston rod 110. The measuring seal 121 is sealed and guided by the second guide ring 126; the first seal mounting seat 115 is provided with a left leakage oil collection hole 111, and the second seal mounting seat 127 is provided with a right leakage oil collection hole 128 ; The piston rod 110 sequentially passes through the first seal mounting seat 115, the left end cover 118, the cylinder 119, the right end cover 125 and the second seal mounting seat 127 and is connected to the right pull pressure sensor 102;

The eccentric adjustment system 160 includes a rear bracket 167 connected to the base 500 through an eleventh screw 177 and a twelfth screw 178 , and a front bracket 172 connected to the base 500 through a fifth screw 162 and a sixth screw 166 , the first spiral micrometer 161, the third spiral micrometer 164, the fifth spiral micrometer 169 and the seventh spiral micrometer 173 connected to the rear bracket 167, the second spiral micrometer connected to the front bracket 172 Micrometer 163, fourth spiral micrometer 165, sixth spiral micrometer 171 and eighth spiral micrometer 175, the seventh screw 168 and the ninth screw 174 connected to the rear bracket 167, connected to the front bracket The eighth screw 170 and the tenth screw 176 on 172; the seventh screw 168, the eighth screw 170, the ninth screw 174 and the tenth screw 176 are used to constrain the movement of the support plate 130 along the movement direction of the piston rod; the The first spiral micrometer 161, the second spiral micrometer 163, the third spiral micrometer 164 and the fourth spiral micrometer 165 are in contact with the lower bottom surface of the support plate 130, the fifth spiral micrometer 169, the sixth spiral micrometer The spiral micrometer 171 , the seventh spiral micrometer 173 and the eighth spiral micrometer 175 are in contact with the upper surface of the support plate 130 ; the first spiral micrometer 161 , the second spiral micrometer 163 , the The third helix 164, the fourth helix 165, the fifth helix 169, the sixth helix 171, the seventh helix 173 and the eighth helix 175 are precessed or Rotate out to adjust the up and down movement or inclination of the support plate 130, so as to realize the eccentric adjustment of the overall structure of the seal testing system 150;

The left reciprocating drive system 200 includes a base 500, a first electric cylinder 220 fixed on the base 500, a first connection flange 230 connected with the extension shaft of the first electric cylinder 220, and fixed on the first connection flange The first reciprocating connecting rod 240 at the right end of 230;

The right reciprocating drive system 300 includes a second electric cylinder 310 fixed on the base 500 , a second connection flange 320 connected with the extension shaft of the second electric cylinder 310 , and a second connection flange 320 fixed on the right end of the second connection flange 320 . Two reciprocating connecting rods 330;

The hydraulic pump station 400 includes a hydraulic oil tank 401, a liquid level gauge 402 and a thermometer 415 installed inside the hydraulic oil tank 401, a gear oil pump 405 connected from the hydraulic oil tank 401, and a coupling 416 connected to the gear oil pump 405 to drive the coupling. The motor 404 that the shaft 416 rotates, the one-way valve 407 connected to the gear oil pump 405, the first stop valve 409 installed at the outlet of the one-way valve 407, the main pressure gauge 408 connected to the first stop valve 409, and the one-way valve Relief valve 406 connected to 407, cooling fan 403 connected to the outlet of relief valve 406, reversing valve 410 connected to the outlet of check valve 407, first hydraulic control check valve 411 connected to reversing valve 410 and the second hydraulically controlled check valve 417, the electric contact pressure gauge 414 connected to the outlet of the second hydraulically controlled check valve 417, the bladder-type accumulator 413 connected to the electric contact pressure gauge 414, and the bladder-type accumulator The second stop valve 412 connected to the valve 413; the oil outlet 117 of the cylinder 119 of the first hydraulic control check valve 411 is connected; the oil inlet 120 of the cylinder 119 of the second hydraulic control check valve 417 is connected; The high pressure oil flowing back from the left hydraulic control check valve 311 is cooled by the cooling fan 403 and then flows back to the hydraulic oil tank 301 .

The left end cover 118 , the first seal mounting seat 115 or the right end cover 125 and the second seal mounting seat 127 can be made of transparent materials, so as to observe the twisting or rolling phenomenon of the seal caused by eccentricity.

The content described in the embodiments of the present specification is only an enumeration of the realization forms of the concept of the utility model, and the protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments, and the protection scope of the present invention also includes the present invention. Equivalent technical means that can be conceived by those skilled in the art according to the concept of the present invention.

Claims (2)

1. A reciprocating sealing device for studying the effect of piston rod eccentricity on the performance of a seal, comprising an experimental performance testing system (100), a left reciprocating drive system (200), a right reciprocating drive system (300), a hydraulic pump station (400) and A base (500); it is characterized in that: The experimental performance test system (100) includes a seal test system (150) and an eccentric adjustment system (160); the seal test system (150) includes a first reciprocating connecting rod ( 240) The left-pull pressure sensor (101) connected to the left-pull pressure sensor (101), the piston rod (110) connected to the left-pull pressure sensor (101), and the right-pull pressure connected to the second reciprocating connecting rod (330) of the right reciprocating drive system (300) The sensor (102), the L-shaped angle bracket (105) fixed on the support plate (130) through the second screw (107), the left end cover (118) connected with the L-shaped angle bracket (105) through the first screw (106) ) and the right end cover (125), the first seal mounting seat (115) connected with the left end cover (118) through the fourth screw (129), the second seal mounting seat (115) connected with the right end cover (125) through the third screw (122) The seal mounting seat (127) is connected with the cylinder barrel (119) of the left end cover (118) and the right end cover (125) through the first nut (103) and the stud bolt (104), and is connected with the cylinder barrel (119) A plug (108); a second static seal (113) is used to seal the place where the cylinder (119) cooperates with the left end cover (118), and a third static seal is used at the place where the cylinder (119) cooperates with the right end cover (125). The oil inlet (120) and the oil outlet (117) are provided on the cylinder barrel (119); the first sealing element mounting seat (115) The first static seal (112) is used to seal the place where it cooperates with the left end cover (118), and the fourth static seal (124) is used to seal the place where the second seal mounting seat (127) cooperates with the right end cover (125). A seal mounting seat (115) and the piston rod (110) are sealed with the left seal to be tested (116) and guided by the first guide ring (114). The second seal mounting seat (127) is connected to the piston rod. (110) The right seal to be tested (121) is used for sealing at the mating part, and the second guide ring (126) guides; the first seal mounting seat (115) is provided with a left leakage oil collecting hole (111), and the first seal mounting seat (115) is provided with a left leakage oil collecting hole (111). The second seal mounting seat (127) is provided with a right leakage oil collecting hole (128); the piston rod (110) passes through the first seal mounting seat (115), the left end cover (118), the cylinder (110) in sequence. 119), the right end cap (125) and the second seal mounting seat (127) and are connected with the right pull pressure sensor (102); The eccentric adjustment system (160) comprises a rear bracket (167) connected to the base (500) through an eleventh screw (177) and a twelfth screw (178); The screw (166) is connected to the front bracket (172) on the base (500), the first spiral micrometer (161), the third spiral micrometer (164), the fifth spiral micrometer (164) and the fifth spiral micrometer are connected to the rear bracket (167). Spiral micrometer (169) and seventh spiral micrometer (173), the second spiral micrometer (163), the fourth spiral micrometer (165), the sixth spiral micrometer connected to the front bracket (172) The micrometer (171) and the eighth screw micrometer (175), the seventh screw (168) and the ninth screw (174) connected to the rear bracket (167), and the seventh screw (174) connected to the front bracket (172) The eighth screw (170) and the tenth screw (176); the seventh screw (168), the eighth screw (170), the ninth screw (174) and the tenth screw (176) are used to restrain the pallet (130) Movement along the movement direction of the piston rod; the first helical micrometer (161), the second helical micrometer (163), the third helical micrometer (164) and the fourth helical micrometer (165) and The lower bottom surface of the pallet (130) is in contact with the fifth spiral micrometer (169), the sixth spiral micrometer (171), the seventh spiral micrometer (173) and the eighth spiral micrometer (175). The upper and top surfaces of the pallet (130) are in contact; the first spiral micrometer (161), the second spiral micrometer (163), the third spiral micrometer (164), and the fourth spiral micrometer ( 165), the fifth spiral micrometer (169), the sixth spiral micrometer (171), the seventh spiral micrometer (173) and the eighth spiral micrometer (175) adjust the bracket by screwing in or out Up and down movement or inclination of the plate (130), thereby realizing eccentric adjustment of the overall structure of the seal testing system (150); The left reciprocating drive system (200) comprises a base (500), a first electric cylinder (220) fixed on the base (500), and a first connection method for connecting with the extension shaft of the first electric cylinder (220) a flange (230), a first reciprocating connecting rod (240) fixed on the right end of the first connecting flange (230); The right reciprocating drive system (300) includes a second electric cylinder (310) fixed on the base (500), a second connection flange (320) connected with the extension shaft of the second electric cylinder (310), and the fixed a second reciprocating connecting rod (330) at the right end of the second connecting flange (320); The hydraulic pump station (400) includes a hydraulic oil tank (401), a liquid level gauge (402) and a thermometer (415) installed inside the hydraulic oil tank (401), and a gear oil pump (405) connected from the hydraulic oil tank (401) , the coupling (416) connected to the gear oil pump (405), the motor (404) that drives the coupling (416) to rotate, the one-way valve (407) connected to the gear oil pump (405), the one-way valve (407) ) the first shut-off valve (409) installed at the outlet, the main pressure gauge (408) connected with the first shut-off valve (409), the relief valve (406) connected with the check valve (407), and the relief valve (406) A cooling fan (403) connected to the outlet, a reversing valve (410) connected to the outlet of the check valve (407), and a first hydraulically controlled check valve (411) connected to the reversing valve (410) and the second hydraulically controlled check valve (417), the electric contact pressure gauge (414) connected to the outlet of the second hydraulically controlled check valve (417), and the bladder-type accumulator connected to the electric contact pressure gauge (414) a second stop valve (412) connected to the bladder-type accumulator (413); the first hydraulic control check valve (411) is connected to the oil outlet (117) of the cylinder (119); The second hydraulic control check valve (417) is connected to the oil inlet (120) of the cylinder (119); the high pressure oil flowing back from the left hydraulic control check valve (311) passes through the cooling fan (403) ) will flow back to the hydraulic oil tank (301) after cooling. 2. A reciprocating sealing device for studying the effect of piston rod eccentricity on the performance of a seal according to claim 1, characterized in that: the left end cover (118), the first seal mounting seat (115) or the right end cover (125) The second seal mounting seat (127) is made of transparent material.