Test bench for testing performance of mechanical sealing element

Abstract

The invention relates to a mechanical sealing element performance test bench, and belongs to the technical field of hydraulic sealing. The test bench comprises a mechanical seal test device, a main shaft, a bearing device, a coupling, a motor, a guide rail device, a test bench desktop, a bearing seat base, a motor seat and a motor seat base. The mechanical seal test device is installed in the middle of the test table top, the guide rail device is installed on the test table top, the bearing seat base and the motor seat base are respectively installed on the guide rail device, the bearing device is fixedly installed on the bearing seat base, one end of the coupler is connected and installed on the motor, and one end of the main shaft is connected with the other end of the coupler. The other end of the main shaft is arranged in the mechanical seal test device; according to the invention, the performance of two different mechanical sealing elements can be tested and compared, and the measurement precision is high; the test bench is simple in structure, is modularized in design, can simplify the dismounting steps, facilitates the measurement and maintenance, is high in test efficiency, is low in cost, and provides a good experiment basis for the sealing design and optimization of a mechanical sealing part.

Description

Technical Field

[0001] The invention relates to a test bench for testing the performance of a mechanical seal, in particular to a test bench for testing the sealing performance in a hydraulic system, and belongs to the technical field of hydraulic sealing. Background Art

[0002] In the fields of hydraulic transmission systems, engineering machinery, and fluid power equipment, the reliability of mechanical seals directly impacts the operating efficiency and service life of hydraulic equipment. The traditional mechanical seal performance testing methods currently used in the hydraulic industry primarily rely on static pressure testing, while testing methods for complex operating conditions such as dynamic alternating pressure and oil-medium compatibility are still incomplete. Existing research has primarily focused on theoretical analysis and finite element simulation of sealing structures, lacking a test verification platform that matches the actual operating conditions of hydraulic systems (such as pulsating pressure shocks, oil temperature fluctuations, and shaft vibration). This results in significant deviations between simulation results and engineering applications. Traditional testing devices generally suffer from complex operating procedures, time-consuming specimen assembly and disassembly, and low loading accuracy. Furthermore, a single test can only test a single sealing structure, making it difficult to quickly compare and analyze seals of multiple specifications. Furthermore, the unique oil contamination control requirements of hydraulic equipment and the lack of real-time monitoring technology for seal interface wear further increase testing costs and data collection difficulties. In response to the above bottlenecks, there is an urgent need to develop an efficient and flexible mechanical seal test platform. Through modular design, it can realize rapid clamping of test pieces, integrate hydraulic dynamic loading system and multi-parameter synchronous acquisition function. While simulating real hydraulic working conditions, it supports parallel testing and performance comparison of different sealing structures under the same conditions, providing efficient technical support for the selection optimization and reliability evaluation of hydraulic equipment seals. Summary of the Invention

[0003] The purpose of the present invention is to provide a mechanical seal performance test bench to solve the problems of high cost, low efficiency and complicated operation of existing mechanical seal performance test.

[0004] The present invention is implemented according to the following technical scheme: a mechanical seal performance test bench, including a mechanical seal test device 1, a main shaft 2, a bearing device 3, a coupling 4, a motor 5, a guide rail device 6, a test bench desktop 7, a bearing seat base 19, a motor seat 21, and a motor seat base 22; the mechanical seal test device 1 is installed in the middle of the test bench desktop 7, the guide rail device 6 is installed on the test bench desktop 7, the bearing seat base 19 and the motor seat base 22 are respectively installed on the guide rail device 6, the motor seat 21 is installed on the motor seat base 22, the motor 5 is fixedly installed on the motor seat 21, the bearing device 3 is fixedly installed on the bearing seat base 19, one end of the coupling 4 is connected to the output shaft of the motor 5, and one end of the main shaft 2 is connected to the other end of the coupling 4 The other end of the main shaft 2 passes through the bearing device 3 and is placed in the mechanical seal test device 1. The bearing device 3 includes a bearing seat shell 14 and a bearing group 15. The bearing seat shell 14 is installed on the bearing base 19, and the bearing group 15 is installed in the bearing seat shell 14. The main shaft 2 is provided with a shaft section I 39, a shaft section II 40, a shaft section III 41, a shaft section IV 42, and a shaft section V 43. The shaft section III 41 is located in the bearing seat shell 14 through the bearing group 15, and the shaft section V 43 is connected to the other end of the coupling 4. The shaft section I 39 is located in the mechanical seal test device 1. Positioning holes I 44 and positioning holes II 45 are opened at both ends of the shaft section I 39 for axial positioning of parts on the shaft. The mechanical seal test device 1 includes a sealing cavity 8, a sealing end cover 10, Mechanical seal test piece 11, shaft sleeve 12, floating ring seal 13; shaft sleeve 12 is fixedly mounted on shaft section Ⅰ 39 of main shaft 2 by screws, positioning holes Ⅰ 44 and positioning holes Ⅱ 45, mechanical seal test piece 11 is mounted in the middle of shaft sleeve 12, the outer ring of sealing end cover 10 is mounted on the end of sealing cavity 8 by bolts 9, the inner ring of sealing end cover 10 is provided with trapezoidal groove 48, floating ring seal 13 is mounted in trapezoidal groove 48, mechanical seal test piece 11 includes spring seat 28, spring 29, auxiliary element 30, dynamic ring 31, static ring 32, anti-rotation pin 33, dynamic ring seal 34, static ring seal 35; spring seat 28 is fixedly mounted in the middle of shaft sleeve 12 by screws, the left end of spring 29 is mounted on spring seat 28, the right end of spring 29 is mounted on The end clamping auxiliary element 30, the dynamic ring 31 and the auxiliary element 30 are engaged with each other to perform axial positioning of the dynamic ring 31, the dynamic ring sealing ring 34 is installed between the auxiliary element 30 and the dynamic ring 31, the dynamic ring sealing ring 34 is used to prevent medium leakage, the inner ring of the sealing end cover 10 is also provided with an anti-rotation pin hole 46, the static ring 32 is fixedly installed on the inner ring of the sealing end cover 10 through the anti-rotation pin 33 and the anti-rotation pin hole 46, the static ring sealing ring 35 is installed between the static ring 32 and the inner ring of the sealing end cover 10, the static ring sealing ring 35 is used to prevent medium leakage, the guide rail device 6 includes a parallel guide rail 16, a guide rail baffle I 17, a guide rail bearing I 18, a screw 20, a slider group I 23, a slider group II 24, a guide rail baffle II 25, a guide rail bearing II 26, and a handwheel 27;The parallel guide rail 16 is fixed on the test bench desktop 7 by screws, the guide rail baffle Ⅰ 17 is fixed on the test bench desktop 7 by screws and is located at one end of the parallel guide rail 16, the guide rail baffle Ⅱ 25 is fixed on the test bench desktop 7 by screws and is located at the other end of the parallel guide rail 16, the guide rail bearing Ⅰ 18 and the guide rail bearing Ⅱ 26 are respectively installed in the guide rail baffle Ⅰ 17 and the guide rail baffle Ⅱ 25, the slider group Ⅰ 23 and the slider group Ⅱ 24 are both installed on the parallel guide rail 16, the slider group Ⅰ 23 and the slider group Ⅱ 24 can slide left and right on the parallel guide rail 16, the bearing seat base 19 and the motor seat base 22 are respectively fixed by the slider group Ⅱ 24 and the slider Assembly I 23 is mounted on guide rail assembly 6. One end of screw 20 is fixed to the inner race of guide rail bearing I 18. The other end of screw 20 is fixed to the inner race of guide rail bearing II 26 and passes through guide rail baffle 25. Bearing seat base 19 and motor seat base 22 are mounted on screw 20. Handwheel 27 is mounted on the other end of screw 20. Inlet holes 36 and outlet holes 37 are respectively defined in the upper and lower portions of the wall of sealing chamber 8. Inlet holes 36 and outlet holes 37 are used to input and output the sealing medium. Sensor mounting holes 38 are also defined in sealing chamber 8 for mounting the sensor element. Leakage holes 47 are defined in the inner wall of sealing end cap 10 for measuring leakage of the sealing medium.

[0005] Both ends of the mechanical seal test device 1 are connected and installed with a main shaft 2, a bearing device 3, a coupling 4, a motor 5, a guide rail device 6, a test bench table 7, a bearing seat base 19, a motor seat 21, and a motor seat base 22. The mechanical seal performance test bench can test the performance of two mechanical seals at the same time. By replacing the sleeve 12 on the main shaft 2, the performance of mechanical seals with different structures can be tested.

[0006] A test method for a mechanical seal performance test bench is as follows: first, the spring seat 28, spring 29, auxiliary element 30, dynamic ring seal 34, and dynamic ring 31 in the mechanical seal test piece 11 are installed on the shaft sleeve 12 in sequence, and the static ring seal 35 and static ring 32 are installed in the sealing end cover 10 and the anti-rotation pin 33 is installed and clamped; then, a sealing medium is introduced through the inlet hole 36 of the mechanical seal test device 1 to fill the sealing cavity 8, and the leakage of the sealing medium is measured from the leakage hole 47 on the inner wall of the sealing end cover 10 to obtain the sealing performance of the mechanical seal 11 under static pressure conditions; secondly, the motor 5 is started to drive the coupling 4 and thus the main shaft 2 to rotate, and the sealing medium is introduced into the inlet hole 36 of the mechanical seal test device 1, and the leakage of the sealing medium is measured from the leakage hole 47 on the inner wall of the sealing end cover 10 to obtain the sealing performance of the mechanical seal 11 under dynamic conditions.

[0007] The present invention has the following beneficial effects: 1. The present invention can test and compare the performance of two different mechanical seals with high measurement accuracy, which can provide important support for hydraulic technology research and product development; 2. The modular design of the present invention can simplify the disassembly and assembly steps, facilitate test bench measurement and maintenance, and guide the selection of mechanical seals in hydraulic systems. It is easy to operate and has high test efficiency. 3. The double-stage symmetrical structure of the present invention can improve test efficiency, reduce test costs, and provide a good experimental basis for the sealing design and optimization of mechanical seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the present invention; Figure 4 This is a schematic diagram of the mechanical seal test device and the bearing seat structure of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the mechanical seal test device and the main shaft of the present invention; Figure 6 This is a schematic diagram of the sealing cavity structure of the present invention; Figure 7 This is a schematic diagram of the main shaft structure of the present invention; Figure 8 This is a schematic diagram of the sealing end cover structure of the present invention; Figure 9 Schematic diagram of the guide rail device structure of the present invention; Figure 10 This is a structural diagram of the guide rail baffle I of the present invention; Figure 11 This is a structural schematic diagram of the guide rail baffle II of the present invention.

[0009] The numbers in the figure are: 1: mechanical seal test device, 2: main shaft, 3: bearing device, 4: coupling, 5: motor, 6: guide rail device, 7: test bench table, 8: sealing cavity, 9: bolt, 10: sealing end cover, 11: mechanical seal test piece, 12: shaft sleeve, 13: floating ring seal, 14: bearing seat housing, 15: bearing group, 16: parallel guide rail, 17: guide rail baffle I, 18: guide rail bearing I, 19: bearing seat base, 20: screw, 21: motor seat, 22: motor seat base, 23: slider group I, 24: Slider group II, 25: Guide rail baffle II, 26: Guide rail bearing, 27: Handwheel, 28: Spring seat, 29: Spring, 30: Auxiliary component, 31: Dynamic ring, 32: Static ring, 33: Anti-rotation pin, 34: Dynamic ring seal, 35: Static ring seal, 36: Inlet hole, 37: Outlet hole, 38: Sensor mounting hole, 39: Shaft section I, 40: Shaft section II, 41: Shaft section III, 42: Shaft section IV, 43: Shaft section V, 44: Positioning hole I, 45: Positioning hole II, 46: Anti-rotation pin hole, 47: Leakage hole, 48: Trapezoidal groove. DETAILED DESCRIPTION

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the scope of the drawings.

[0011] Example 1: Figure 1-11As shown, a mechanical seal performance test bench includes a mechanical seal test device 1, a main shaft 2, a bearing device 3, a coupling 4, a motor 5, a guide rail device 6, a test bench desktop 7, a bearing seat base 19, a motor seat 21, and a motor seat base 22; the mechanical seal test device 1 is installed in the middle of the test bench desktop 7, the guide rail device 6 is installed on the test bench desktop 7, the bearing seat base 19 and the motor seat base 22 are respectively installed on the guide rail device 6, the motor seat 21 is installed on the motor seat base 22, the motor 5 is fixedly installed on the motor seat 21, the bearing device 3 is fixedly installed on the bearing seat base 19, one end of the coupling 4 is connected to the output shaft of the motor 5, one end of the main shaft 2 is connected to the other end of the coupling 4, and the other end of the main shaft 2 is connected to the output shaft of the motor 5. One end passes through the bearing device 3 and is placed in the mechanical seal test device 1. The bearing device 3 includes a bearing seat shell 14 and a bearing group 15. The bearing seat shell 14 is installed on the bearing base 19, and the bearing group 15 is installed in the bearing seat shell 14. The main shaft 2 is provided with a shaft section I 39, a shaft section II 40, a shaft section III 41, a shaft section IV 42, and a shaft section V 43. The shaft section III 41 is located in the bearing seat shell 14 through the bearing group 15, and the shaft section V 43 is connected to the other end of the coupling 4. The shaft section I 39 is located in the mechanical seal test device 1. Positioning holes I 44 and positioning holes II 45 are opened at both ends of the shaft section I 39 for axial positioning of the parts on the shaft. The mechanical seal test device 1 includes a sealing cavity 8, a sealing end cover 10, and a mechanical seal test Test piece 11, shaft sleeve 12, floating ring seal 13; shaft sleeve 12 is fixedly mounted on shaft section Ⅰ39 of main shaft 2 by screws, positioning holes Ⅰ44 and positioning holes Ⅱ45, mechanical seal test piece 11 is mounted in the middle of shaft sleeve 12, outer ring of sealing end cover 10 is mounted on the end of sealing cavity 8 by bolts 9, inner ring of sealing end cover 10 is provided with trapezoidal groove 48, floating ring seal 13 is mounted in trapezoidal groove 48, mechanical seal test piece 11 includes spring seat 28, spring 29, auxiliary element 30, dynamic ring 31, static ring 32, anti-rotation pin 33, dynamic ring seal 34, static ring seal 35; spring seat 28 is fixedly mounted in the middle of shaft sleeve 12 by screws, left end of spring 29 is mounted on spring seat 28, and right end of spring 29 is clamped The auxiliary element 30 and the dynamic ring 31 are engaged with the auxiliary element 30 to axially position the dynamic ring 31. The dynamic ring sealing ring 34 is installed between the auxiliary element 30 and the dynamic ring 31. The dynamic ring sealing ring 34 is used to prevent medium leakage. The inner ring of the sealing end cover 10 is also provided with an anti-rotation pin hole 46. The static ring 32 is fixedly installed on the inner ring of the sealing end cover 10 through the anti-rotation pin 33 and the anti-rotation pin hole 46. The static ring sealing ring 35 is installed between the static ring 32 and the inner ring of the sealing end cover 10. The static ring sealing ring 35 is used to prevent medium leakage. The guide rail device 6 includes a parallel guide rail 16, a guide rail baffle I 17, a guide rail bearing I 18, a screw 20, a slider group I 23, a slider group II 24, a guide rail baffle II 25, a guide rail bearing II 26, and a handwheel 27.The parallel guide rail 16 is fixed on the test bench desktop 7 by screws, the guide rail baffle Ⅰ 17 is fixed on the test bench desktop 7 by screws and is located at one end of the parallel guide rail 16, the guide rail baffle Ⅱ 25 is fixed on the test bench desktop 7 by screws and is located at the other end of the parallel guide rail 16, the guide rail bearing Ⅰ 18 and the guide rail bearing Ⅱ 26 are respectively installed in the guide rail baffle Ⅰ 17 and the guide rail baffle Ⅱ 25, the slider group Ⅰ 23 and the slider group Ⅱ 24 are both installed on the parallel guide rail 16, the slider group Ⅰ 23 and the slider group Ⅱ 24 can slide left and right on the parallel guide rail 16, the bearing seat base 19 and the motor seat base 22 are respectively fixed by the slider group Ⅱ 24 and the slider Assembly I 23 is mounted on guide rail assembly 6. One end of screw 20 is fixed to the inner race of guide rail bearing I 18. The other end of screw 20 is fixed to the inner race of guide rail bearing II 26 and passes through guide rail baffle 25. Bearing seat base 19 and motor seat base 22 are mounted on screw 20. Handwheel 27 is mounted on the other end of screw 20. Inlet holes 36 and outlet holes 37 are respectively defined in the upper and lower portions of the wall of sealing chamber 8. Inlet holes 36 and outlet holes 37 are used to input and output the sealing medium. Sensor mounting holes 38 are also defined in sealing chamber 8 for mounting the sensor element. Leakage holes 47 are defined in the inner wall of sealing end cap 10 for measuring leakage of the sealing medium.

[0012] Both ends of the mechanical seal test device 1 are connected and installed with a main shaft 2, a bearing device 3, a coupling 4, a motor 5, a guide rail device 6, a test bench table 7, a bearing seat base 19, a motor seat 21, and a motor seat base 22. The mechanical seal performance test bench can test the performance of two mechanical seals at the same time. By replacing the sleeve 12 on the main shaft 2, the performance of mechanical seals with different structures can be tested.

Claims

1. A mechanical seal performance test bench, comprising a mechanical seal test device (1), a main shaft (2), a bearing device (3), a coupling (4), a motor (5), a guide rail device (6), a test bench table (7), a bearing seat base (19), a motor seat (21), and a motor seat base (22); the mechanical seal test device (1) is mounted on the middle of the test bench table (7), the guide rail device (6) is mounted on the test bench table (7), the bearing seat base (19) and the motor seat base (22) are respectively mounted on the guide rail device (6), the motor seat (21) is mounted on the motor seat base (22), and the motor (5) is fixedly mounted. The motor base (21) is mounted on the bearing assembly (3), the bearing assembly (3) is fixedly mounted on the bearing base (19), one end of the coupling (4) is connected to the output shaft of the motor (5), one end of the main shaft (2) is connected to the other end of the coupling (4), the other end of the main shaft (2) passes through the bearing assembly (3) and is placed in the mechanical seal test device (1), the bearing assembly (3) includes a bearing housing (14), a bearing group (15); the bearing housing (14) is mounted on the bearing base (19), the bearing group (15) is mounted in the bearing housing (14), and the main shaft (2) is provided with shaft section I (39), shaft section II (40), shaft section III ( 41), shaft section IV (42), shaft section V (43); shaft section III (41) passes through the bearing group (15) and is located in the bearing seat housing (14), shaft section V (43) is connected to the other end of the coupling (4), shaft section I (39) is located in the mechanical seal test device (1), and positioning holes I (44) and positioning holes II (45) are opened at both ends of shaft section I (39) for axial positioning of parts on the shaft. The mechanical seal test device (1) includes a sealing cavity (8), a sealing end cover (10), a mechanical seal test piece (11), a shaft sleeve (12), and a floating ring seal (13); the shaft sleeve (12) is connected to the positioning holes by screws. Ⅰ (44), positioning hole Ⅱ (45) are fixedly mounted on the shaft section Ⅰ (39) of the main shaft (2), the mechanical seal test piece (11) is mounted on the middle of the shaft sleeve (12), the outer ring of the sealing end cover (10) is mounted on the end of the sealing cavity (8) through bolts (9), the inner ring of the sealing end cover (10) is provided with a trapezoidal groove (48), the floating ring seal (13) is mounted in the trapezoidal groove (48), the mechanical seal test piece (11) includes a spring seat (28), a spring (29), an auxiliary element (30), a dynamic ring (31), a static ring (32), an anti-rotation pin (33), a dynamic ring seal (34), and a static ring seal (35);The spring seat (28) is fixedly mounted on the middle of the shaft sleeve (12) by screws, the left end of the spring (29) is mounted on the spring seat (28), the right end of the spring (29) clamps the auxiliary element (30), the dynamic ring (31) and the auxiliary element (30) are engaged with each other, and are used to axially position the dynamic ring (31), the dynamic ring sealing ring (34) is mounted between the auxiliary element (30) and the dynamic ring (31), and the dynamic ring sealing ring (34) is used to prevent medium leakage, and the inner ring of the sealing end cover (10) is also provided with an anti-rotation pin hole (46), and the static ring (32) is fixedly mounted on the inner ring of the sealing end cover (10) through the anti-rotation pin (33) and the anti-rotation pin hole (46). The static ring seal (35) is installed between the static ring (32) and the inner ring of the sealing end cover (10). The static ring seal (35) is used to prevent medium leakage. The guide rail device (6) includes a parallel guide rail (16), a guide rail baffle I (17), a guide rail bearing I (18), a screw (20), a slider group I (23), a slider group II (24), a guide rail baffle II (25), a guide rail bearing II (26), and a handwheel (27). The parallel guide rail (16) is fixed to the test bench table (7) by screws. The guide rail baffle I (17) is fixed to the test bench table (7) by screws and is located at one end of the parallel guide rail (16). The guide rail baffle II (25) ) is fixed on the test bench table (7) by screws and is located at the other end of the parallel guide rail (16). The guide rail bearing I (18) and the guide rail bearing II (26) are respectively installed in the guide rail baffle I (17) and the guide rail baffle II (25). The slider group I (23) and the slider group II (24) are both installed on the parallel guide rail (16). The slider group I (23) and the slider group II (24) can slide left and right on the parallel guide rail (16). The bearing seat base (19) and the motor seat base (22) are respectively installed on the guide rail device (6) through the slider group II (24) and the slider group I (23). One end of the screw rod (20) is fixed on the guide rail bearing I (18 ) inner ring, the other end of the screw (20) is fixed to the inner ring of the guide rail bearing II (26) and passes through the guide rail baffle (25), the bearing seat base (19) and the motor seat base (22) are installed on the screw (20), and the hand wheel (27) is installed on the other end of the screw (20). The upper and lower parts of the cavity wall of the sealing cavity (8) are respectively provided with an inlet hole (36) and an outlet hole (37). The inlet hole (36) and the outlet hole (37) are used to input and output the sealing medium. The sealing cavity (8) is also provided with a sensor mounting hole (38) for installing the sensor element. The inner wall of the sealing end cover (10) is provided with a leakage hole (47) for measuring the leakage of the sealing medium. ; 2. The mechanical seal performance test bench according to claim 1, characterized in that: Both ends of the mechanical seal test device (1) are connected and installed with a main shaft (2), a bearing device (3), a coupling (4), a motor (5), a guide rail device (6), a test bench table (7), a bearing seat base (19), a motor seat (21), and a motor seat base (22). The mechanical seal performance test bench can test the performance of two mechanical seals at the same time. By replacing the shaft sleeve (12) on the main shaft (2), the performance of mechanical seals with different structures can be tested.

3. The test method of the mechanical seal performance test bench according to claim 1 is characterized in that: The specific steps are as follows: first, the spring seat (28), spring (29), auxiliary element (30), dynamic ring seal (34), and dynamic ring (31) in the mechanical seal test piece (11) are sequentially installed on the shaft sleeve (12), and the static ring seal (35) and static ring (32) are installed in the sealing end cover (10) and the anti-rotation pin (33) is installed and clamped; then, the sealing medium is introduced through the inlet hole (36) of the mechanical seal test device (1) to fill the sealing cavity (8), and the sealing medium is introduced from the sealing end cover (10). 0) The leakage amount of the sealing medium is measured through the leakage hole (47) on the inner wall, and the sealing performance of the mechanical seal (11) under static pressure can be obtained; secondly, the motor (5) is started, so that the motor (5) drives the coupling (4) and thus drives the main shaft (2) to rotate, and the sealing medium is introduced into the inlet hole (36) of the mechanical seal test device (1), and the leakage amount of the sealing medium is measured from the leakage hole (47) on the inner wall of the sealing end cover (10), and the sealing performance of the mechanical seal (11) under dynamic conditions can be obtained.

Images