Cavitation visualization liquid ring vacuum pump device

Abstract

The utility model relates to a cavitation visualization liquid ring vacuum pump device which comprises a pump shaft, the middle of the pump shaft is fixedly sleeved with an impeller, the positions, on the two sides of the impeller, of the outer side of the pump shaft are sleeved with a front disc and a rear disc correspondingly, and a pump body is fixedly connected to the outer side between the front disc and the rear disc in a sealed mode; a transparent visible plate is fixedly embedded in the outer side of the pump body in a sealed mode, and pump covers are connected to the positions, on the opposite end faces of the front disc and the rear disc, of the outer side of the pump shaft in a sleeving mode. According to the structure provided by the embodiment of the invention, the cavitation condition of the impeller in the pump body can be effectively observed under the condition that the pump body is not disassembled after the pump body is shut down through the transparent visible plate, and the operation stability of a pump set is effectively guaranteed; and a first sealing ring and a second sealing ring of the mechanical sealing structure can enlarge the sealing structure in the mechanical sealing box, and an extrusion spring can also apply extrusion force to an extrusion baffle ring, so that the first sealing ring and the second sealing ring are extruded, and the sealing degree of the pump body is efficiently increased.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum pumps, and in particular to a cavitation visualized liquid ring vacuum pump device. Background Art

[0002] The liquid ring vacuum pump is mainly composed of a bearing gland, a pump cover, a pump body, a support bearing, a locating bearing, an impeller, a disc, an exhaust valve plate, a mechanical seal, etc. Since liquid ring vacuum pumps generally have cavitation, the traditional liquid ring vacuum pump body is in a fully enclosed state. In order to observe the cavitation of the liquid ring vacuum pump body and impeller, the cavitation of the vacuum pump impeller can only be observed visually by disassembling the vacuum pump during unit maintenance. In addition, ordinary mechanical seal components are severely worn after long-term use and cannot achieve a good sealing effect. Therefore, we proposed a cavitation visualization liquid ring vacuum pump device. Utility Model Content

[0003] The present application provides a cavitation visualization liquid ring vacuum pump device to solve the above-mentioned problems.

[0004] The present application provides a cavitation visualization liquid ring vacuum pump device, comprising:

[0005] A pump shaft, wherein an impeller is fixedly sleeved in the middle of the pump shaft, and a front disc and a rear disc are respectively sleeved on both sides of the impeller on the outside of the pump shaft, and a pump body is fixedly and sealedly connected on the outside between the front disc and the rear disc, and a transparent visual plate is fixedly and sealedly inlaid on the outside of the pump body;

[0006] The outer side of the pump shaft is sleeved with pump covers on the opposite end faces of the front disc and the rear disc, the outer side of the pump shaft is rotatably sleeved with a support bearing frame on the outer sides of the two pump covers, the pump shaft is sleeved with a mechanical sealing box at the relative sleeve joints between the support bearing frame and the pump cover, and the pump shaft is sleeved with a mechanical sealing structure inside the mechanical sealing box.

[0007] Preferably, the outer end of the support bearing frame is sleeved on the outer side of the pump shaft through the first locating bearing, and the support bearing frame on the left side is also fixedly connected to a bearing cover at the outer end of the first locating bearing, an outer shaft sealing ring is provided between the bearing cover and the pump shaft sleeve joint surface, and an inner shaft sealing ring is provided on the inner side of the support bearing frame sleeved on the pump shaft.

[0008] Preferably, the right side of the right-side supporting bearing frame is connected to the positioning bearing chamber through the second positioning bearing sleeve on the outside of the pump shaft, the right end of the second positioning bearing is provided with a positioning bearing pressure ring, and an adjustment gasket is provided between the positioning bearing chamber and the right-side supporting bearing frame.

[0009] Preferably, the mechanical sealing structure includes a first limiting ring, a first sealing ring, a second limiting ring, a second sealing ring, an extrusion retaining ring, an extrusion spring and a third limiting ring. The first limiting ring is sleeved on the outer side of the pump shaft and on the left side of the inner cavity of the mechanical sealing box. A first sealing ring is arranged between the first limiting ring and the side wall of the mechanical sealing box. A second limiting ring is arranged at the end of the first sealing ring away from the side wall of the mechanical sealing box, and a second sealing ring is arranged on the upper part of the outer side of the second limiting ring. An extrusion retaining ring is arranged at the right end of the second sealing ring. An extrusion retaining ring is arranged at the end of the extrusion retaining ring to apply extrusion force. The third limiting ring is clamped at the right end of the extrusion spring and the outer end of the second sealing ring.

[0010] Preferably, the connecting end of the pump shaft is also connected to a split coupling via a flat key.

[0011] Preferably, a sleeve is fixed on the outer side of the pump shaft at a sleeve mechanical seal structure, and the mechanical seal structure is sleeved on the outer side of the sleeve.

[0012] Preferably, exhaust valve plates are fixedly connected to opposite surfaces of the front disc and the rear disc by bolts, and a valve plate baffle is fixedly connected to the outer side of the exhaust valve plate.

[0013] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0014] The structure provided in the embodiment of the present application has a transparent visual plate that enables the cavitation of the impeller inside the pump body to be effectively observed without stopping the pump body, thereby effectively ensuring the stability of the operation of the pump group; and the first sealing ring and the second sealing ring of the mechanical sealing structure can increase the sealing structure inside the mechanical sealing box, thereby increasing the sealing degree between the mechanical sealing box and the shaft sleeve, and increasing the sealing degree of the pump body, and the extrusion spring also applies an extrusion force to the extrusion retaining ring, thereby squeezing the first sealing ring and the second sealing ring, thereby greatly increasing the sealing degree of the periphery where the first sealing ring and the second sealing ring are located, and efficiently increasing the sealing degree of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0016] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is an overall cross-sectional view of the utility model;

[0018] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle.

[0019] In the figure: 1. flat key; 2. pump shaft; 3. bearing pressure cover; 4. first locating bearing; 5. shaft sleeve; 6. mechanical seal structure; 61. first limit ring; 62. first sealing ring; 63. second limit ring; 64. second sealing ring; 65. extrusion retaining ring; 66. extrusion spring; 67. third limit ring; 7. pump cover; 8. pump body; 9. support bearing frame; 10. locating bearing chamber; 11. second locating bearing; 12. rear disc; 13. impeller; 14. front disc; 15. exhaust valve plate; 16. valve plate baffle; 17. mechanical seal box; 18. adjusting gasket; 19. locating bearing pressure ring; 20. outer shaft sealing ring; 21. inner shaft sealing ring; 22. split coupling; 23. transparent visual plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0021] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0022] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc or abc, where a, b, c can be single or plural, respectively.

[0023] like Figure 1-Figure 2 As shown, the embodiment of the present application provides a cavitation visualization liquid ring vacuum pump device, comprising:

[0024] A pump shaft 2, wherein an impeller 13 is fixedly sleeved in the middle of the pump shaft 2, and a front disc 14 and a rear disc 12 are sleeved on both sides of the impeller 13 outside the pump shaft 2, and a pump body 8 is fixedly and sealedly connected on the outside between the front disc 14 and the rear disc 12, and a transparent visual plate 23 is fixedly and sealedly inlaid on the outside of the pump body 8;

[0025] The pump shaft 2 is sleeved with pump covers 7 on the opposite end faces of the front disc 14 and the rear disc 12 on the outside, and a support bearing frame 9 is rotatably sleeved on the outside of the two pump covers 7 on the outside of the pump shaft 2. The pump shaft 2 is sleeved with a mechanical sealing box 17 at the relative sleeve joints between the support bearing frame 9 and the pump cover 7, and the pump shaft 2 is sleeved with a mechanical sealing structure 6 inside the mechanical sealing box 17.

[0026] Specifically, the transparent visual panel 23 enables the cavitation of the impeller 13 inside the pump body to be effectively observed without stopping the pump body, thereby effectively ensuring the stability of the operation of the pump unit.

[0027] like Figure 1As shown: the outer end of the support bearing frame 9 is sleeved on the outer side of the pump shaft 2 through the first locating bearing 4, and the support bearing frame 9 on the left side is also fixedly connected to a bearing cover 3 at the outer end of the first locating bearing 4, an outer shaft sealing ring 20 is provided between the sleeve surface of the bearing cover 3 and the pump shaft 2, and the support bearing frame 9 is sleeved on the inner side of the pump shaft 2 and is provided with an inner shaft sealing ring 21.

[0028] like Figure 1 As shown: the right side of the right-side supporting bearing frame 9 is connected to the locating bearing chamber 10 through the second locating bearing 11 on the outside of the pump shaft 2, and the right end of the second locating bearing 11 is provided with a locating bearing pressure ring 19, and an adjusting gasket 18 is provided between the locating bearing chamber 10 and the right-side supporting bearing frame 9.

[0029] like Figure 1 and Figure 2 As shown: the mechanical sealing structure 6 includes a first limiting ring 61, a first sealing ring 62, a second limiting ring 63, a second sealing ring 64, an extrusion retaining ring 65, an extrusion spring 66 and a third limiting ring 67. The first limiting ring 61 is sleeved on the outer side of the pump shaft 2 and on the left side of the inner cavity of the mechanical sealing box 17. The first sealing ring 62 is provided between the first limiting ring 61 and the side wall of the mechanical sealing box 17. The end of the first sealing ring 62 away from the side wall of the mechanical sealing box 17 is provided with a second limiting ring 63, and a second sealing ring 64 is provided on the upper part of the outer side of the second limiting ring 63. The right end of the second sealing ring 64 is provided with an extrusion retaining ring 65, and the end of the extrusion retaining ring 65 is provided with an extrusion spring 66 to apply extrusion force. The third limiting ring 67 is clamped at the right end of the extrusion spring 66 and the outer end of the second sealing ring 64.

[0030] Specifically, the first sealing ring 62 and the second sealing ring 64 of the mechanical sealing structure 6 can increase the sealing structure inside the mechanical sealing box 17, thereby increasing the sealing between the mechanical sealing box 17 and the shaft sleeve 5, and increasing the sealing of the pump body, and the extrusion spring 66 will also apply an extrusion force to the extrusion retaining ring 65, thereby squeezing the first sealing ring 62 and the second sealing ring 64, thereby greatly increasing the sealing of the surrounding areas where the first sealing ring 62 and the second sealing ring 64 are located.

[0031] like Figure 1 As shown: the connecting end of the pump shaft 2 is also connected to a split coupling 22 via a flat key 1.

[0032] Specifically, the split coupling 22 is used to connect an external transmission shaft.

[0033] like Figure 1 As shown, the outer side of the pump shaft 2 is fixedly connected to the sleeve 5 at the sleeve mechanical seal structure 6 , and the mechanical seal structure 6 is sleeved on the outer side of the sleeve 5 .

[0034] Specifically, the outer side of the shaft sleeve 5 is for connecting the mechanical sealing structure 6 .

[0035] like Figure 1 As shown, the exhaust valve plates 15 are fixedly connected to the opposite surfaces of the front disc 14 and the rear disc 12 by bolts, and a valve plate baffle 16 is fixedly connected to the outer side of the exhaust valve plate 15 .

[0036] Specifically, when the exhaust valve plate 15 is opened and the impeller 13 rotates, the air inside the pump body can be continuously discharged, so that the air in the external equipment can be drawn to achieve the effect of vacuuming.

[0037] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A cavitation visualization liquid ring vacuum pump device, characterized in that: include: A pump shaft (2), wherein an impeller (13) is fixedly sleeved in the middle of the pump shaft (2), and a front disc (14) and a rear disc (12) are respectively sleeved on both sides of the impeller (13) outside the pump shaft (2), and a pump body (8) is fixedly and sealedly connected on the outside between the front disc (14) and the rear disc (12), and a transparent visual plate (23) is fixedly and sealedly inlaid on the outside of the pump body (8); The pump shaft (2) is sleeved with a pump cover (7) on the opposite end faces of the front disc (14) and the rear disc (12), and the pump shaft (2) is sleeved with a support bearing frame (9) on the outside of the two pump covers (7) for rotation. The pump shaft (2) is sleeved with a mechanical seal box (17) at the relative sleeve joint between the support bearing frame (9) and the pump cover (7), and the pump shaft (2) is sleeved with a mechanical seal structure (6) inside the mechanical seal box (17).

2. A cavitation visualization liquid ring vacuum pump device according to claim 1, characterized in that: The outer end of the support bearing frame (9) is sleeved on the outer side of the pump shaft (2) through the first positioning bearing (4), and the left support bearing frame (9) is also fixedly connected to a bearing cover (3) at the outer end of the first positioning bearing (4), an outer shaft sealing ring (20) is provided between the sleeve surface of the bearing cover (3) and the pump shaft (2), and an inner shaft sealing ring (21) is provided on the inner side of the support bearing frame (9) sleeved on the pump shaft (2).

3. A cavitation visualization liquid ring vacuum pump device according to claim 2, characterized in that: The right side of the right support bearing frame (9) is sleeved with a positioning bearing chamber (10) via a second positioning bearing (11) on the outside of the pump shaft (2); a positioning bearing pressure ring (19) is provided at the right end of the second positioning bearing (11); and an adjustment washer (18) is provided between the positioning bearing chamber (10) and the right support bearing frame (9).

4. The cavitation visualization liquid ring vacuum pump device according to claim 1, characterized in that: The mechanical seal structure (6) comprises a first limiting ring (61), a first sealing ring (62), a second limiting ring (63), a second sealing ring (64), an extrusion retaining ring (65), an extrusion spring (66) and a third limiting ring (67). The first limiting ring (61) is sleeved on the outer side of the pump shaft (2) and on the left side of the inner cavity of the mechanical seal box (17). The first sealing ring (62) is arranged between the first limiting ring (61) and the side wall of the mechanical seal box (17). The end of the first sealing ring (62) away from the side wall of the mechanical seal box (17) is provided with a second limiting ring (63), and a second sealing ring (64) is arranged on the upper part of the outer side of the second limiting ring (63). The right end of the second sealing ring (64) is provided with an extrusion retaining ring (65). The end of the extrusion retaining ring (65) is provided with an extrusion spring (66) for applying extrusion force. The third limiting ring (67) is engaged with the right end of the extrusion spring (66) and the outer end of the second sealing ring (64).

5. The cavitation visualization liquid ring vacuum pump device according to claim 1, characterized in that: The connection end of the pump shaft (2) is also connected to a split coupling (22) via a flat key (1).

6. The cavitation visualization liquid ring vacuum pump device according to claim 1, characterized in that: The outer side of the pump shaft (2) is fixedly sleeved with a shaft sleeve (5) at a sleeved mechanical seal structure (6), and the mechanical seal structure (6) is sleeved on the outer side of the shaft sleeve (5).

7. The cavitation visualization liquid ring vacuum pump device according to claim 1, characterized in that: An exhaust valve plate (15) is fixedly connected to opposite surfaces of the front disc (14) and the rear disc (12) via bolts, and a valve plate baffle (16) is fixedly connected to the outer side of the exhaust valve plate (15).

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