Plunger pump high-pressure sealing friction wear on-line monitoring device

Abstract

The invention discloses a plunger pump high-pressure sealing friction wear on-line monitoring device, and relates to the technical field of sealing detection, the plunger pump high-pressure sealing friction wear on-line monitoring device comprises a device main body and a test board, the device main body comprises a sliding mechanism, a transmission mechanism connected with the sliding mechanism and a clamping structure connected with the transmission mechanism, the sliding mechanism comprises first sliding rods, a sliding plate, a telescopic rod and a moving plate, and the two first sliding rods are arranged on the testing table. The device has the advantages that the plunger pump A and the plunger pump B are placed on the testing table, a motor B of the transmission mechanism is started to drive rod bodies to rotate, and through meshing transmission of a worm gear and a worm, the plunger pump A and the plunger pump B are driven to rotate; a screw A drives a clamping plate A and a clamping plate B to be close to each other, another motor C drives a clamping plate C and a clamping plate D on a screw B to move, an embedded plate is arranged in a matched mode to achieve dynamic clamping of two sets of plunger pumps A and plunger pumps B, and pose deviation caused by installation errors or space limitation is effectively compensated.

Description

Technical Field

[0001] The present invention relates to the technical field of seal detection, and specifically to an on-line monitoring device for high-pressure seal friction and wear of a plunger pump. Background Art

[0002] A plunger pump is an important device in a hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder block to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation. In the hydraulic systems of some large-scale mechanical equipment, it is necessary to provide hydraulic power for multiple actuators simultaneously. The flow output of a single plunger pump is often insufficient, and the pressure stability and regulation accuracy cannot reach the ideal effect. A double plunger pump integrates two independent but cooperative plunger pump structures in one pump body, which can meet the working requirements of large flow and high pressure to a certain extent;

[0003] However, there are still some problems in the actual application of the existing double plunger pumps. On the one hand, the existing detection devices usually only adopt the traditional planar clamping structure, and cannot realize the dynamic clamping of the two groups of plunger pumps through a multi-degree-of-freedom mechanism, resulting in insufficient complex spatial pose deviation compensation ability. On the other hand, the cleaning area cannot dynamically clean the oil distribution disc in real time according to the clamping field. These dual limitations of the mechanical structure and control logic make it difficult to stably reach the highest industry standards for the cleanliness of multi-specification plunger pumps, and the pre-detection processing efficiency is significantly lower than the actual demand. For this reason, we propose an on-line monitoring device for high-pressure seal friction and wear of a plunger pump. Summary of the Invention

[0004] The purpose of the present invention is to provide an on-line monitoring device for high-pressure seal friction and wear of a plunger pump.

[0005] To achieve the above object, the present invention provides the following technical solution: An on-line monitoring device for high-pressure seal friction and wear of a plunger pump, comprising a device main body and a test bench. The device main body includes a sliding mechanism, a transmission mechanism connected to the sliding mechanism, and a clamping structure connected to the transmission mechanism. The sliding mechanism includes a first slide bar, a slide plate, a telescopic rod, and a moving plate. Both of the first slide bars are arranged on the test bench. The slide plate is arranged on the first slide bars. A groove is formed inside the slide plate. Both of the telescopic rods are arranged inside the groove. The moving plate is arranged between the two telescopic rods. The transmission mechanism includes a motor B, a rod body, a worm, a screw A, an electromagnetic clutch, a clamping plate A, and a clamping plate B. The top surface of the rod body is arranged at the bottom surface of the motor B. The rod body includes a threaded section and a second rotating shaft. The top surface of the second rotating shaft is arranged at the bottom surface of the threaded section. A worm gear is arranged on the second rotating shaft. The worm is meshed with the worm gear. The screw A and the electromagnetic clutch are both arranged on the worm. The clamping plate A and the clamping plate B are arranged on the screw A in sequence from left to right. The clamping structure includes a clamping frame, a motor C, a screw B, a clamping plate C, a clamping plate D, and an inlay plate. The motor C is arranged inside the clamping frame. The screw B is arranged on the right side of the motor C. The clamping plate C and the clamping plate D are arranged on the screw B in sequence from left to right. The number of inlay plates is four. Two of the inlay plates are respectively arranged on the left sides of the clamping plate C and the clamping plate B. The other two inlay plates are respectively arranged on the right sides of the clamping plate D and the clamping plate A. Both the screw A and the screw B adopt a double-thread design. The clamping plate A and the clamping plate B are symmetrically arranged with each other. The clamping plate C and the clamping plate D are symmetrically arranged with each other.

[0006] As a further solution of the present invention: A cleaning structure is arranged on the sliding mechanism. The cleaning structure includes a motor A, a second gear, a third gear, a bottom plate, a surrounding rod, an arc plate, and a rotating rod. A first gear is arranged at the bottom of the motor A. The first gear is meshed with the second gear and the third gear respectively. The first gear, the second gear, and the third gear are respectively arranged between the bottom plate and the moving plate. Eccentric wheels are arranged at the bottoms of both of the first rotating shafts. A moving rod is arranged on the eccentric wheel. A sliding cylinder is arranged at the bottom of the moving rod. The sliding cylinder is slidably connected to the surrounding rod. The surrounding rod and the rotating rod are both arranged on the arc plate. Outer rods are arranged on both sides of the first rotating shaft. Adjusting rods are arranged on both sides of the rotating rod. Brushes are arranged on the adjusting rods at positions corresponding to the plunger pump A and the plunger pump B.

[0007] As a further solution of the present invention: Two detection benches are arranged on the test bench. Two groups of plunger pump A and plunger pump B are arranged on the two detection benches. Oil distribution discs are arranged on both groups of plunger pump A and plunger pump B. And both groups of plunger pump A and plunger pump B are arranged oppositely.

[0008] As a further solution of the present invention: a vibration sensor is provided on the detection table, and temperature sensors and rotational speed sensors are provided in front of each of the two plunger pumps A and plunger pumps B. The temperature sensor is an infrared non-contact type and is installed 5 mm to the side of the oil distribution disk.

[0009] As a further solution of the present invention: a controller is provided on the left side of the test bench. The controller is electrically connected to the telescopic rod, motor A, motor B, electromagnetic clutch, motor C, vibration sensor, temperature sensor, and rotational speed sensor respectively.

[0010] As a further solution of the present invention: the number of the adjusting rods and the brushes is set to four, and the adjusting rods and the brushes are evenly distributed on both sides of the rotating rod.

[0011] Adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. In the present invention, by placing the two plunger pumps A and the plunger pumps B on the detection table, starting the motor B of the transmission mechanism to drive the rod body to rotate, and through the meshing transmission of the worm gear and the worm, the screw A drives the two clamping plates A and the clamping plate B to approach each other, and another motor C drives the clamping plate C and the clamping plate D on the screw B to move, and the dynamic clamping of the two plunger pumps A and the plunger pumps B is realized in cooperation with the provided embedded plate, effectively compensating for the pose deviation caused by installation errors or space limitations, and ensuring that the two plunger pumps A and the plunger pumps B do not shake or shift during the detection process;

[0013] 2. In the present invention, the motor A drives the gear one, the gear two and the gear three meshed therewith to drive, thereby driving the eccentric wheel at the bottom to rotate. The rotation of the eccentric wheel drives the sliding cylinder at the bottom to slide on the surrounding rod, and further realizes the simultaneous cleaning of the oil distribution disks of the two opposite plunger pumps A and the plunger pumps B by the two side brushes, so that the cleaning area can dynamically clean the oil distribution disk in real time according to the clamping field of the two plunger pumps A and the plunger pumps B;

[0014] 3. Through the setting of the transmission mechanism and the clamping structure, the present invention can not only efficiently perform dynamic clamping on different specifications of plunger pumps A and plunger pumps B, but also achieve precise detection in a complex space environment, providing reliable technical support for the quality evaluation and performance analysis of plunger pumps A and plunger pumps B, and effectively solving the double limitations of the mechanical structure and control logic of the existing detection device, resulting in the problem that the cleanliness of multi-specification plunger pumps is difficult to stably reach the highest industry standard, and the pre-detection processing efficiency is significantly lower than the actual demand.

[0015] Other advantages, objects, and features of the present invention will be set forth in part in the following description, and in part will be obvious to those skilled in the art from a study of the following, or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the first three-dimensional schematic diagram in the embodiment of the present invention;

[0017] Figure 2 is the connection structure schematic diagram of the telescopic rod and the moving plate in the embodiment of the present invention;

[0018] Figure 3 is the connection structure schematic diagram of the transmission mechanism, the clamping structure, and the vibration sensor in the embodiment of the present invention;

[0019] Figure 4 is the first three-dimensional schematic diagram of the cleaning structure in the embodiment of the present invention;

[0020] Figure 5 is Figure 4 the schematic diagram at position A in

[0021] Figure 6 is the second three-dimensional schematic diagram of the cleaning structure in the embodiment of the present invention;

[0022] Figure 7 is the three-dimensional schematic diagram of the transmission mechanism in the embodiment of the present invention;

[0023] Figure 8 is the connection structure schematic diagram of the oil distribution disc, the temperature sensor, and the rotational speed sensor in the embodiment of the present invention;

[0024] Figure 9 is the three-dimensional schematic diagram of the detection table in the embodiment of the present invention.

[0025] In the figure: 1. Device main body; 2. Test bench; 4. Sliding mechanism; 41. First slide bar; 42. Slide plate; 43. Telescopic rod; 44. Moving plate; 5. Cleaning structure; 51. Motor A; 52. First gear; 53. Second gear; 54. Third gear; 55. Base plate; 56. Eccentric wheel; 57. Moving rod; 58. Slide cylinder; 59. Enclosing rod; 60. Arc plate; 61. Rotating rod; 62. External rod; 63. Adjusting rod; 64. Brush; 65. Shaft A; 7. Transmission mechanism; 71. Motor B; 721. Threaded section; 722. Shaft B; 73. Worm gear; 74. Worm; 75. Screw A; 77. Electromagnetic clutch; 78. Clamping plate A; 79. Clamping plate B; 8. Clamping structure; 81. Clamping frame; 82. Motor C; 83. Screw B; 85. Clamping plate C; 86. Clamping plate D; 87. Inserted plate; 9. Detection table; 11. Plunger pump A; 12. Plunger pump B; 15. Oil distribution disk; 16. Vibration sensor; 17. Temperature sensor; 18. Rotation speed sensor. Detailed implementation manners

[0026] The following further explains the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the explanations of these implementation manners are used to help understand the present invention, but do not constitute a limitation to the present invention.

[0027] In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Please refer to the attached Figure 1 - attached Figure 9, an on-line monitoring device for high-pressure seal friction and wear of a plunger pump according to the present invention, comprising a device main body 1 and a test bench 2. The device main body 1 includes a sliding mechanism 4, a transmission mechanism 7 connected to the sliding mechanism 4, and a clamping structure 8 connected to the transmission mechanism 7. The sliding mechanism 4 includes a first slide bar 41, a slide plate 42, a telescopic rod 43, and a moving plate 44. Both first slide bars 41 are arranged on the test bench 2. The slide plate 42 is arranged on the first slide bars 41. A groove is formed inside the slide plate 42. Both telescopic rods 43 are arranged inside the groove. The moving plate 44 is arranged between the two telescopic rods 43, facilitating the adjustment of the moving plate 44, thereby moving the bottom brush 64 to dynamically clean the oil distribution plates 15 on the two plunger pumps A11 and the plunger pump B12. The transmission mechanism 7 includes a motor B71, a rod body, a worm 74, a screw A75, an electromagnetic clutch 77, a clamping plate A78, and a clamping plate B79. The top surface of the rod body is arranged on the bottom surface of the motor B71. The rod body includes a threaded section 721 and a rotating shaft B722. The top surface of the rotating shaft B722 is arranged on the bottom surface of the threaded section 721. A worm gear 73 is arranged on the rotating shaft B722. The worm 74 meshes with the worm gear 73. The screw A75 and the electromagnetic clutch 77 are both arranged on the worm 74. The clamping plate A78 and the clamping plate B79 are arranged on the screw A75 in sequence from left to right. The clamping structure 8 includes a clamping frame 81, a motor C82, a screw B83, a clamping plate C85, a clamping plate D86, and an inlay plate 87. The motor C82 is arranged inside the clamping frame 81. The screw B83 is arranged on the right side of the motor C82. The clamping plate C85 and the clamping plate D86 are arranged on the screw B83 in sequence from left to right. The number of inlay plates 87 is set to four. Two of the inlay plates 87 are respectively arranged on the left sides of the clamping plate C85 and the clamping plate B79, and the other two inlay plates 87 are respectively arranged on the right sides of the clamping plate D86 and the clamping plate A78. Both the screw A75 and the screw B83 adopt a double-thread design. The clamping plate A78 and the clamping plate B79 are symmetrically arranged with each other, and the clamping plate C85 and the clamping plate D86 are symmetrically arranged with each other, thereby dynamically clamping the two plunger pumps A11 and the plunger pump B12 on the two test benches 9.

[0029] Embodiment 1. A cleaning structure 5 is provided on the sliding mechanism 4. The cleaning structure 5 includes a motor A51, a second gear 53, a third gear 54, a bottom plate 55, a surrounding rod 59, an arc-shaped plate 60, and a rotating rod 61. A first gear 52 is provided at the bottom of the motor A51. The first gear 52 meshes with the second gear 53 and the third gear 54 respectively. The first gear 52, the second gear 53, and the third gear 54 are respectively arranged between the bottom plate 55 and the moving plate 44. Eccentric wheels 56 are provided at the bottoms of both rotating shafts A65. A moving rod 57 is provided on the eccentric wheel 56. A sliding cylinder 58 is provided at the bottom of the moving rod 57. The sliding cylinder 58 is slidably connected to the surrounding rod 59. The surrounding rod 59 and the rotating rod 61 are both provided on the arc-shaped plate 60. External rods 62 are provided on both sides of the rotating shaft A65. Adjusting rods 63 are provided on both sides of the rotating rod 61. Brushes 64 are provided on the adjusting rods 63 at positions corresponding to the plunger pump A11 and the plunger pump B12.

[0030] Specifically, the motor A51 drives the first gear 52 at the bottom and the second gear 53 and the third gear 54 meshing with it, thereby driving the eccentric wheel 56 at the bottom to rotate. The rotation of the eccentric wheel 56 drives the sliding cylinder 58 at the bottom to slide on the surrounding rod 59, thereby realizing the simultaneous cleaning of the oil distribution plates 15 of the two groups of opposing plunger pumps A11 and plunger pumps B12 by the brushes 64 on both sides.

[0031] Embodiment 2. Two detection platforms 9 are provided on the test bench 2. Two groups of plunger pumps A11 and plunger pumps B12 are provided on the two detection platforms 9. Oil distribution plates 15 are provided on both groups of plunger pumps A11 and plunger pumps B12, and the two groups of plunger pumps A11 and plunger pumps B12 are arranged oppositely.

[0032] Specifically, by placing the two groups of plunger pumps A11 and plunger pumps B12 on the detection platform 9 and starting the transmission mechanism 7 and the clamping structure 8 to dynamically clamp the two groups of plunger pumps A11 and plunger pumps B12, it is convenient for the main body 1 of the device to accurately position and stably fix the plunger pumps A11 and plunger pumps B12 with different diameters and specifications in a complex space, effectively compensating for the pose deviation caused by installation errors or space limitations, and ensuring that the plunger pumps A11 and plunger pumps B12 do not shake or shift during the detection process.

[0033] Specifically, by sliding the sliding cylinder 58 on the surrounding rod 59, the rotational motion is converted into a swing arm motion. At this time, the arc-shaped plate 60 and the surrounding rod 59 perform a swing arm motion along the rotating rod 61, causing the adjusting rod 63 and the brush 64 to swing along an arc path. Since the oil distribution disk 15 is circular, it can better fit the circumferential surface of the oil distribution disk 15. During the swinging process of the brush 64, the contact with the oil distribution disk 15 is closer and more uniform, so that the surface of the oil distribution disk 15 can be cleaned more efficiently. At the same time, the circular oil distribution disk 15 is adapted to the arc-shaped swinging path of the brush 64, reducing the cleaning dead angle and ensuring the consistency of the cleaning effect. During the swinging process, the brush 64 always maintains a suitable contact angle and pressure with the oil distribution disk 15, avoiding affecting the cleaning effect due to too large a swinging amplitude or angle deviation, and can simultaneously clean the two sets of plunger pumps A11 and plunger pumps B12.

[0034] Embodiment 3: A vibration sensor 16 is provided on the test bench 9. Temperature sensors 17 and rotational speed sensors 18 are provided in front of the two sets of plunger pumps A11 and plunger pumps B12. The temperature sensor 17 is an infrared non-contact type and is installed 5 mm to the side of the oil distribution disk 15. A controller is provided on the left side of the test bench 2. The controller is electrically connected to the telescopic rod 43, the motor A51, the motor B71, the electromagnetic clutch 77, the motor C82, the vibration sensor 16, the temperature sensor 17, and the rotational speed sensor 18. The number of the adjusting rods 63 and the brushes 64 is set to four, and the adjusting rods 63 and the brushes 64 are evenly distributed on both sides of the rotating rod 61.

[0035] Specifically, the vibration sensor 16 is provided to monitor the vibration condition of the test bench 9 in real time. By capturing abnormal signals such as component loosening and wear, it provides an important basis for judging the operating conditions of the plunger pumps A11 and plunger pumps B12. The temperature sensor 17 monitors the temperature changes of the plunger pumps A11 and plunger pumps B12 during operation in real time to avoid damage to the plunger pumps A11 and plunger pumps B12 due to excessive temperature. The rotational speed sensor 18 is used to accurately measure the rotational speeds of the plunger pumps A11 and plunger pumps B12 to ensure that they operate within the specified rotational speed range. The clamping structure 8 and the transmission mechanism 7 are used to clamp the plunger pumps A11 and plunger pumps B12, and the cleaning structure 5 performs dynamic cleaning on the plunger pumps A11 and plunger pumps B12. At the same time, with the collaborative work of the vibration sensor 16, the temperature sensor 17, and the rotational speed sensor 18, the two sets of plunger pumps A11 and plunger pumps B12 can be detected and evaluated more comprehensively and accurately.

[0036] Specifically, the rod at the bottom is driven by the motor B71, thereby driving the transmission between the worm wheel 73 and the worm 74, so that the screw A75 drives the two clamping plates A78 and the clamping plate B79 to move closer to each other, realizing the moving clamping of one group of the plunger pump A11 and the plunger pump B12. The motor C82 drives the clamping plate C85 and the clamping plate D86 on the screw B83 to move, and cooperates with the arranged embedded plate 87 to dynamically clamp the two groups of the plunger pump A11 and the plunger pump B12.

[0037] Specifically, through the setting of the transmission mechanism 7 and the clamping structure 8, the device can not only efficiently perform dynamic clamping on the plunger pump A11 and the plunger pump B12 with different specifications, but also achieve precise detection in a complex space environment, providing reliable technical support for the quality evaluation and performance analysis of the plunger pump A11 and the plunger pump B12, and effectively solving the problems of poor adaptability and low detection accuracy existing in the existing detection devices when detecting the multi-specification plunger pump A11 and the plunger pump B12.

[0038] Working principle:

[0039] First, move the device main body 1 to the required position, and dynamically clamp the two sets of plunger pumps A11 and plunger pump B12 and place them on the test bench 9 respectively. When it is necessary to dynamically clamp the two sets of plunger pumps A11 and plunger pump B12, start the motor B71 to drive the threaded section 721 to move, thereby driving the moving plate 44 and the sliding plate 42 to move downward. At this time, the bottom screw A75 drives the two clamping plates A78 and clamping plate B79 to move relative to each other under the meshing action of the worm gear 73 and the worm 74, dynamically clamping one set of the plunger pumps A11 and plunger pump B12. At this time, turn off the electromagnetic clutch 77. When it is necessary to clamp the other set of plunger pumps A11 and plunger pump B12, start another motor C82 to drive the clamping plates C85 and clamping plate D86 on the screw B83 to move, and cooperate with the arranged embedded plate 87 to realize the dynamic clamping of the two sets of plunger pumps A11 and plunger pump B12. When it is necessary to clean the two sets of plunger pumps A11 and plunger pump B12, start the motor A51 to rotate, and the first gear 52, the second gear 53 meshing with it, and the third gear 54 drive, thereby driving the bottom eccentric wheel 56 to rotate. The rotation of the eccentric wheel 56 drives the bottom sliding cylinder 58 to slide on the surrounding rod 59, and further realizes the simultaneous cleaning of the oil distribution plates 15 of the two sets of opposite plunger pumps A11 and plunger pump B12 by the two side brushes 64. After the cleaning is completed, cooperate with the arranged vibration sensor 16 to detect the vibration condition of the test bench 9, and the temperature sensor 17 and the rotational speed sensor 18 respectively monitor the temperature and the rotational speeds of the two sets of opposite plunger pumps A11 and plunger pump B12. After the detection is completed, when it is not necessary to clean the two oil distribution plates 15, open the electromagnetic clutch 77, and start the motor B71 again to drive the threaded section 721 to move, thereby driving the two clamping plates A78 and clamping plate B79 to move towards each other, and cooperate with the motor C82 to move towards each other. Thus, the entire working process ends.

[0040] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0042] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0043] For those skilled in the art, without departing from the principles and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.

Claims

1. An online monitoring device for high-pressure seal friction and wear of a plunger pump, comprising a device body (1) and a test bench (2), characterized in that: The device body (1) comprises a sliding mechanism (4), a transmission mechanism (7) connected to the sliding mechanism (4) and a clamping structure (8) connected to the transmission mechanism (7); the sliding mechanism (4) comprises a sliding rod (41), a sliding plate (42), a telescopic rod (43) and a movable plate (44); the two sliding rods (41) are both arranged on the test bench (2); the sliding plate (42) is arranged on the sliding rod (41); a groove is provided inside the sliding plate (42); the two telescopic rods (43) are both arranged inside the groove; the movable plate (44) ) is arranged between two telescopic rods (43), the transmission mechanism (7) comprises a motor B (71), a rod body, a worm (74), a screw A (75), an electromagnetic clutch (77), a clamping plate A (78) and a clamping plate B (79), the top surface of the rod body is arranged on the bottom surface of the motor B (71), the rod body comprises a threaded section (721) and a rotating shaft B (722), the top surface of the rotating shaft B (722) is arranged on the bottom surface of the threaded section (721), a worm wheel (73) is arranged on the rotating shaft B (722), and the worm (74) meshes with the worm wheel (73) The screw rod A (75) and the electromagnetic clutch (77) are both arranged on the worm (74); the clamping plate A (78) and the clamping plate B (79) are arranged on the screw rod A (75) from left to right in sequence; the clamping structure (8) comprises a clamping frame (81), a motor C (82), a screw rod B (83), a clamping plate C (85), a clamping plate D (86) and a panel (87); the motor C (82) is arranged inside the clamping frame (81); the screw rod B (83) is arranged on the right side of the motor C (82); the clamping plate C (85) and the clamping plate D (86) are arranged on the right side of the motor C (82); 6) are sequentially arranged on the screw rod B (83) from left to right, the number of the panels (87) is set to four, two of which are respectively arranged on the left side of the clamping plate C (85) and the clamping plate B (79), and the other two panels (87) are respectively arranged on the right side of the clamping plate D (86) and the clamping plate A (78), the screw rod A (75) and the screw rod B (83) both adopt a bidirectional thread design, the clamping plate A (78) and the clamping plate B (79) are symmetrically arranged, and the clamping plate C (85) and the clamping plate D (86) are symmetrically arranged.

2. The plunger pump high pressure seal friction and wear online monitoring device according to claim 1, characterized in that: The sliding mechanism (4) is provided with a cleaning structure (5), and the cleaning structure (5) comprises a motor A (51), a gear 2 (53), a gear 3 (54), a bottom plate (55), a surrounding rod (59), an arc plate (60) and a rotating rod (61). The bottom of the motor A (51) is provided with a gear 1 (52), and the gear 1 (52) is meshed with the gear 2 (53) and the gear 3 (54) respectively. The gear 1 (52), the gear 2 (53) and the gear 3 (54) are respectively arranged between the bottom plate (55) and the moving plate (44). The two rotating shafts A (65 ) is provided with an eccentric wheel (56) at the bottom, a moving rod (57) is provided on the eccentric wheel (56), a slide cylinder (58) is provided at the bottom of the moving rod (57), the slide cylinder (58) is slidably connected to a surrounding rod (59), the surrounding rod (59) and the rotating rod (61) are both provided on an arc plate (60), external rods (62) are provided on both sides of the rotating shaft A (65), adjusting rods (63) are provided on both sides of the rotating rod (61), and a brush (64) is provided on the adjusting rod (63) at a position relative to the plunger pump A (11) and the plunger pump B (12).

3. The on-line monitoring device for high-pressure seal friction and wear of a plunger pump according to claim 2, characterized in that: The test bench (2) is provided with two test benches (9), and the two test benches (9) are provided with two groups of plunger pumps A (11) and plunger pumps B (12). Both groups of plunger pumps A (11) and plunger pumps B (12) are provided with oil distribution plates (15), and the two groups of plunger pumps A (11) and plunger pumps B (12) are arranged opposite to each other.

4. The on-line monitoring device for high-pressure seal friction and wear of a plunger pump according to claim 3, characterized in that: A vibration sensor (16) is provided on the detection platform (9), and a temperature sensor (17) and a rotation speed sensor (18) are provided in front of the two groups of plunger pumps A (11) and plunger pumps B (12). The temperature sensor (17) is an infrared non-contact type and is installed 5 mm to the side of the oil distribution plate (15).

5. The plunger pump high pressure seal friction and wear online monitoring device according to claim 4, characterized in that: A controller is provided on the left side of the test bench (2), and the controller is electrically connected to the telescopic rod (43), the motor A (51), the motor B (71), the electromagnetic clutch (77), the motor C (82), the vibration sensor (16), the temperature sensor (17), and the speed sensor (18).

6. The plunger pump high pressure seal friction and wear online monitoring device according to claim 2, characterized in that: The number of the adjusting rods (63) and the brushes (64) is set to four, and the adjusting rods (63) and the brushes (64) are evenly distributed on both sides of the rotating rod (61).

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