Mechanical seal test bed for kettle

Abstract

The utility model relates to a mechanical seal test bed for kettles, which comprises a rack, a first support frame and a second support frame which are distributed up and down are arranged on the rack, a first bearing and a second bearing are respectively arranged in the first support frame and the second support frame, an eccentric sleeve is arranged in an inner ring of the first bearing, and a second bearing is arranged in an outer ring of the second bearing. An elastic sleeve made of a flexible material is arranged in an inner ring of the second bearing, a transmission shaft is in key connection with the eccentric sleeve, the lower end of the transmission shaft penetrates through the elastic sleeve and is in interference fit with the elastic sleeve, the lower end of the transmission shaft is in transmission connection with a motor arranged on the rack, and the upper end of the transmission shaft penetrates through the eccentric sleeve and is connected with a test shaft; the rack is provided with a placing rack, and the test shaft upwards penetrates out of the placing rack. The mechanical seal test bed for the kettle can simulate the use scene of the mechanical seal for the kettle more truly, so that the test result is more reasonable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seal test equipment, in particular to a mechanical seal test bench for a kettle. Background Art

[0002] Kettle mechanical seals are used in reactors to mechanically seal the stirring shaft of the reactor. When the stirring shaft stirs the material in the reactor, it will be subjected to the reaction force of the material and produce a small swing. In the production process, the kettle mechanical seal needs to be tested on a test bench to simulate the usage scenario of the kettle mechanical seal to ensure its sealing performance. However, the existing kettle mechanical seal test bench does not simulate the usage scenario realistically, which interferes with the reliability of the test results.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a mechanical seal test bench for a kettle, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A mechanical seal test bench for a kettle, comprising a bench, wherein a first support frame and a second support frame are arranged on the bench and distributed up and down, a first bearing and a second bearing are arranged in the first support frame and the second support frame respectively, an eccentric sleeve is arranged in the inner ring of the first bearing, an elastic sleeve made of flexible material is arranged in the inner ring of the second bearing, a transmission shaft is keyed in the eccentric sleeve, the lower end of the transmission shaft passes through the elastic sleeve and is interference fit with the elastic sleeve, and the lower end of the transmission shaft is connected to a motor arranged on the bench, the upper end of the transmission shaft passes through the eccentric sleeve and is connected to a test shaft, a placement rack is arranged on the bench, and the test shaft passes through the placement rack upwards.

[0007] Preferably, the first support frame includes a first support tube, a first upper end cover and a first lower end cover, the first support tube is fixedly connected to the stand, the first bearing is arranged in the first support tube, the first upper end cover and the first lower end cover are respectively fixedly connected to the upper and lower ports of the first support tube, and the first upper end cover and the first lower end cover are respectively provided with a first upper through hole and a first lower through hole, the second support frame includes a second support tube, a second upper end cover and a second lower end cover, the second support tube is fixedly connected to the first support tube through a connecting tube, the second bearing is arranged in the second support tube, the second upper end cover and the second lower end cover are respectively fixedly connected to the upper and lower ports of the second support tube, and the second upper end cover and the second lower end cover are respectively provided with a second upper through hole and a second lower through hole.

[0008] Preferably, a first skeleton oil seal sleeved on the transmission shaft is arranged in the first upper through hole, a second skeleton oil seal sleeved on the eccentric sleeve is arranged in the first lower through hole, a third skeleton oil seal sleeved on the transmission shaft is arranged in the second upper through hole, a fourth skeleton oil seal sleeved on the transmission shaft is arranged in the second lower through hole, and lubricating oil is injected into the first support cylinder and the second support cylinder.

[0009] Preferably, the inner wall of the second bearing inner ring is in an inverted cone shape, the outer contour of the elastic sleeve matches the inner wall of the second bearing inner ring, and the outer side wall of the elastic sleeve is tightly against the inner wall of the second bearing inner ring.

[0010] Preferably, a first support ring surrounding the transmission shaft is arranged in the first upper through hole, and a second support ring abutting against an upper end surface of the first support ring is fixedly connected to the transmission shaft.

[0011] Preferably, a mounting ring is fixedly connected to the lower end of the test shaft, and the mounting ring is fixedly connected to the upper end surface of the transmission shaft by bolts.

[0012] Preferably, a positioning portion is formed at the lower end of the test shaft, a positioning groove matching the positioning portion is formed on the upper end surface of the transmission shaft, and the positioning portion is placed in the positioning groove.

[0013] To sum up, the beneficial effect of the utility model is that the motor drives the transmission shaft to rotate, and the transmission shaft drives the eccentric sleeve to rotate. Under the cooperation of the eccentric sleeve and the elastic sleeve, the transmission shaft deviates from its axis and produces a pendulum while rotating, thereby driving the test shaft to rotate and pendulum in the kettle mechanical seal, thereby more realistically simulating the use scenario of the kettle mechanical seal, making the test results more reasonable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0017] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle.

[0018] In the figure: 1. test bench; 2. first support frame; 21. first bearing; 22. first support cylinder; 23. first upper end cover; 231. first upper through hole; 24. first lower end cover; 241. first lower through hole; 25. first skeleton oil seal; 26. second skeleton oil seal; 27. first support ring; 28. second support ring; 3. second support frame; 31. second bearing; 32. second support cylinder; 33. second upper end cover; 331. second upper through hole; 34. second lower end cover; 341. second lower through hole; 35. third skeleton oil seal; 36. fourth skeleton oil seal; 4. eccentric sleeve; 5. elastic sleeve; 6. transmission shaft; 61. positioning groove; 7. motor; 8. test shaft; 81. mounting ring; 82. positioning part; 9. placement rack; 10. connecting cylinder. DETAILED DESCRIPTION

[0019] The following will be combined with the attached embodiment of the present utility model Figure 1-3 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] As shown in the figure, a mechanical seal test bench for a kettle includes a stand 1, on which a first support frame 2 and a second support frame 3 are arranged in an upper and lower distribution, a first bearing 21 and a second bearing 31 are arranged in the first support frame 2 and the second support frame 3 respectively, an eccentric sleeve 4 is arranged in the inner ring of the first bearing 21 with an interference connection with the inner ring of the first bearing 21, an elastic sleeve 5 made of flexible material is arranged in the inner ring of the second bearing 31 with an interference connection with the inner ring of the second bearing 31, a transmission shaft 6 is connected with a key in the eccentric sleeve 4, the lower end of the transmission shaft 6 passes through the elastic sleeve 5 with an interference fit with the elastic sleeve 5, and the lower end of the transmission shaft 6 is transmission-connected to a motor 7 arranged on the stand 1, the upper end of the transmission shaft 6 passes through the eccentric sleeve 4 and is connected to a test shaft 8, a placement rack 9 is arranged on the stand 1, and the test shaft 8 passes through the placement rack 9 upwards.

[0021] Specifically, the first support frame 2 includes a first support cylinder 22, a first upper end cover 23 and a first lower end cover 24, the first support cylinder 22 is fixedly connected to the platform 1, the first bearing 21 is arranged in the first support cylinder 22, the first upper end cover 23 and the first lower end cover 24 are respectively fixedly connected to the upper and lower ports of the first support cylinder 22, and the first upper end cover 23 and the first lower end cover 24 are respectively provided with a first upper through hole 231 and a first lower through hole 241, the transmission shaft 6 passes through the first upper through hole 231 upwards and passes through the first lower through hole 241 downwards, the second support frame 3 includes a second support cylinder 32, a second upper end cover 23 and a first lower end cover 24. The second support tube 32 is fixedly connected to the first support tube 22 through the connecting tube 10, and the second bearing 31 is arranged in the second support tube 32. The second upper end cover 33 and the second lower end cover 34 are respectively fixedly connected to the upper and lower ports of the second support tube 32, and the second upper end cover 33 and the second lower end cover 34 are respectively provided with a second upper through hole 331 and a second lower through hole 341, and the transmission shaft 6 passes through the second upper through hole 331 upward and passes through the second lower through hole 341 downward. The above-mentioned first support frame 2 and the second support frame 3 are respectively composed of various components spliced ​​together, which facilitates the assembly operation of the test bench.

[0022] In the above embodiment, the kettle mechanical seal to be tested is placed on the placement rack 9 for fixation (the fixation of the kettle mechanical seal and the placement table can be achieved by bolts penetrated on the kettle mechanical seal, which is a common method in the field and will not be described here), and the test shaft 8 is inserted into the kettle mechanical seal, and the motor 7 drives the transmission shaft 6 to rotate through the cooperation of the pulley and the transmission belt, and the transmission shaft 6 drives the eccentric sleeve 4 to rotate. Under the cooperation of the eccentric sleeve 4 and the elastic sleeve 5, the transmission shaft 6 deviates from its axis while rotating to produce a pendulum, thereby driving the test shaft 8 to rotate and pendulum in the kettle mechanical seal, so as to more realistically simulate the use scenario of the kettle mechanical seal, and make the test result more reasonable and reliable. In the process of rotation of the transmission shaft 6 and the eccentric sleeve 4, the first bearing 21 and the second bearing 31 ensure the smoothness of the rotation of the transmission shaft 6 and the eccentric sleeve 4, and the elastic sleeve 5 provides space for the pendulum of the transmission shaft 6 through elastic deformation while ensuring the synchronous rotation of the transmission shaft 6 and the inner ring of the second bearing 31.

[0023] Preferably, a first skeleton oil seal 25 sleeved on the transmission shaft 6 is arranged in the first upper through hole 231, a second skeleton oil seal 26 sleeved on the eccentric sleeve 4 is arranged in the first lower through hole 241, a third skeleton oil seal 35 sleeved on the transmission shaft 6 is arranged in the second upper through hole 331, and a fourth skeleton oil seal 36 sleeved on the transmission shaft 6 is arranged in the second lower through hole 341. Lubricating oil is injected into the first support cylinder 22 and the second support cylinder 32. The first bearing 21 and the second bearing 31 have better working performance under the action of the lubricating oil, thereby ensuring the smoothness of the rotation of the transmission shaft 6 during continuous long-term tests, ensuring more reasonable and reliable test results, and also improving the reliability of the test bench.

[0024] Preferably, the inner wall of the inner ring of the second bearing 31 is in an inverted cone shape, the outer contour of the elastic sleeve 5 matches the inner wall of the inner ring of the second bearing 31, and the outer side wall of the elastic sleeve 5 is tightly against the inner wall of the inner ring of the second bearing 31, so that the elastic sleeve 5 is more stably maintained between the inner ring of the second bearing 31 and the transmission shaft 6 and cooperates with the eccentric sleeve 4 to drive the transmission shaft 6 to produce a swing, thereby improving the reliability of the test bench.

[0025] Preferably, a first support ring 27 surrounding the transmission shaft 6 is provided in the first upper through hole 231, and a second support ring 28 is fixedly connected to the transmission shaft 6 and abuts against the upper end surface of the first support ring 27. The first support ring 27 and the second support ring 28 cooperate to provide axial support for the transmission shaft 6, thereby reducing the axial movement of the transmission shaft 6 when it rotates and deflects, thereby making the test results more reasonable and reliable.

[0026] Preferably, a mounting ring 81 is fixedly connected to the lower end of the test shaft 8, and the mounting ring 81 is fixedly connected to the upper end surface of the transmission shaft 6 by bolts. The structure in which the test shaft 8 is fixedly connected to the transmission shaft 6 facilitates the disassembly and assembly of the test shaft 8, thereby facilitating replacement of test shafts 8 with different outer diameters according to the size of the mechanical seal for the kettle to be tested, thereby improving the applicability of the test bench.

[0027] Preferably, a positioning portion 82 is formed at the lower end of the test shaft 8, and a positioning groove 61 matching the positioning portion 82 is formed on the upper end surface of the transmission shaft 6, and the positioning portion 82 is placed in the positioning groove 61. The positioning portion 82 and the positioning groove 61 are in the shape of a polygonal column. When disassembling and assembling the test shaft 8, the test shaft 8 can be more conveniently aligned with the axis of the transmission shaft 6 through the cooperation of the positioning portion 82 and the positioning groove 61, thereby facilitating the disassembly and assembly of the test shaft 8.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical seal test bench for a kettle, comprising a stand (1), characterized in that: The bench (1) is provided with a first support frame (2) and a second support frame (3) which are distributed up and down. A first bearing (21) and a second bearing (31) are respectively provided in the first support frame (2) and the second support frame (3). An eccentric sleeve (4) is provided in the inner ring of the first bearing (21). An elastic sleeve (5) made of a flexible material is provided in the inner ring of the second bearing (31). A transmission shaft (6) is connected to the eccentric sleeve (4) by a key. The lower end of the transmission shaft (6) passes through the elastic sleeve (5) and is interference-fitted with the elastic sleeve (5). The lower end of the transmission shaft (6) is transmission-connected to a motor (7) provided on the bench (1). The upper end of the transmission shaft (6) passes through the eccentric sleeve (4) and is connected to a test shaft (8). A placement frame (9) is provided on the bench (1), and the test shaft (8) passes through the placement frame (9) upwards.

2. The mechanical seal test bench for a kettle according to claim 1, characterized in that: The first support frame (2) comprises a first support tube (22), a first upper end cover (23) and a first lower end cover (24); the first support tube (22) is fixedly connected to the platform (1); the first bearing (21) is arranged in the first support tube (22); the first upper end cover (23) and the first lower end cover (24) are respectively fixedly connected to the upper and lower ports of the first support tube (22); the first upper end cover (23) and the first lower end cover (24) are respectively provided with a first upper through hole (231) and a first lower through hole (241); the second support tube (22) is fixedly connected to the platform (1); the first bearing (21) is arranged in the first support tube (22); the first upper end cover (23) and the first lower end cover (24) are respectively provided with a first upper through hole (231) and a first lower through hole (241); The frame (3) comprises a second support tube (32), a second upper end cover (33) and a second lower end cover (34); the second support tube (32) is fixedly connected to the first support tube (22) via a connecting tube (10); the second bearing (31) is arranged in the second support tube (32); the second upper end cover (33) and the second lower end cover (34) are respectively fixedly connected to the upper and lower ports of the second support tube (32); and the second upper end cover (33) and the second lower end cover (34) are respectively provided with a second upper through hole (331) and a second lower through hole (341).

3. The mechanical seal test bench for a kettle according to claim 2, characterized in that: A first skeleton oil seal (25) sleeved on the transmission shaft (6) is arranged in the first upper through hole (231), a second skeleton oil seal (26) sleeved on the eccentric sleeve (4) is arranged in the first lower through hole (241), a third skeleton oil seal (35) sleeved on the transmission shaft (6) is arranged in the second upper through hole (331), a fourth skeleton oil seal (36) sleeved on the transmission shaft (6) is arranged in the second lower through hole (341), and lubricating oil is injected into the first support cylinder (22) and the second support cylinder (32).

4. The mechanical seal test bench for a kettle according to claim 1, characterized in that: The inner wall of the inner ring of the second bearing (31) is in the shape of an inverted cone, the outer contour of the elastic sleeve (5) matches the inner wall of the inner ring of the second bearing (31), and the outer wall of the elastic sleeve (5) is tightly against the inner wall of the inner ring of the second bearing (31).

5. The mechanical seal test bench for a kettle according to claim 2, characterized in that: A first support ring (27) surrounding the transmission shaft (6) is arranged in the first upper through hole (231), and a second support ring (28) abutting against the upper end surface of the first support ring (27) is fixedly connected to the transmission shaft (6).

6. The mechanical seal test bench for a kettle according to claim 1, characterized in that: A mounting ring (81) is fixedly connected to the lower end of the test shaft (8), and the mounting ring (81) is fixedly connected to the upper end surface of the transmission shaft (6) by means of bolts.

7. The mechanical seal test bench for a kettle according to claim 6, characterized in that: A positioning portion (82) is formed at the lower end of the test shaft (8), a positioning groove (61) matching the positioning portion (82) is formed on the upper end surface of the transmission shaft (6), and the positioning portion (82) is placed in the positioning groove (61).

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