Combined mechanical seal for pump

Abstract

The utility model discloses a combined mechanical seal for a pump, which comprises a pump shell and a rotating shaft, the rotating shaft is rotatably connected with the pump shell through a bearing, a sealing sleeve is arranged on one side of the pump shell and outside the rotating shaft, a first sealing ring is arranged in the sealing sleeve, a second sealing ring is arranged on one side of the first sealing ring, and a sealing ring is arranged on the other side of the second sealing ring. Three circular ring sealing plates are arranged in the first sealing ring, circular ring grooves are formed in the positions, corresponding to the circular ring sealing plates, of the outer portion of the rotating shaft, the inner surfaces of the circular ring grooves are attached to the outer surfaces of the circular ring sealing plates, a first circular ring rubber pad is arranged in the second sealing ring, and the inner ring of the first circular ring rubber pad tightly abuts against the outer ring of the rotating shaft. By means of the arrangement, the sealing performance between the rotating shaft and the pump shell is improved, liquid in the pump shell is not prone to leaking to the outside, and stable transportation of liquid materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to a combined mechanical seal for a pump. Background Art

[0002] A pump is a machine for transporting fluids or increasing the pressure of fluids. A pump includes a pump casing and a rotating shaft. When the pump body starts, it will drive the rotating shaft to rotate. Most of the rotating shafts in the existing pump bodies are rotatably connected to the pump casing by bearings, and the sealing effect is limited and difficult to improve. When the rotating shaft works for a long time at a high speed, the liquid in the pump body is likely to leak out from the gap between the rotating shaft and the pump casing, thus affecting the fluid transportation work.

[0003] Therefore, it is necessary to provide a combined mechanical seal for a pump to solve the above problems. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a combined mechanical seal for a pump to solve the problems put forward in the above background art.

[0005] To solve the above problems, the utility model adopts the following technical scheme:

[0006] A combined mechanical seal for a pump, including a pump casing and a rotating shaft. The rotating shaft is rotatably connected to the pump casing through a bearing. A sealing sleeve is arranged on one side of the pump casing and outside the rotating shaft. A first sealing ring is arranged inside the sealing sleeve. A second sealing ring is arranged on one side of the first sealing ring. Three circular ring sealing plates are arranged inside the first sealing ring. Circular ring grooves are arranged on the outside of the rotating shaft corresponding to the circular ring sealing plates. The inner surface of the circular ring groove is fitted with the outer surface of the circular ring sealing plate. A first circular ring rubber pad is arranged inside the second sealing ring. The inner ring of the first circular ring rubber pad is tightly abutted against the outer ring of the rotating shaft. A sealing seat is arranged inside the sealing sleeve. The inner surface of the sealing seat is fitted with the outer surface of the rotating shaft. A through port is arranged on one side of the sealing sleeve. A second circular ring rubber pad is embedded in the through port.

[0007] Preferably, the inner ring of the second circular ring rubber pad is tightly abutted against the outer ring of the rotating shaft.

[0008] Preferably, connection blocks are arranged at both the top and bottom of the first sealing ring, and the two connection blocks are respectively connected to the inner wall of the adjacent sealing sleeve.

[0009] Preferably, a circular ring limiting plate is arranged inside the sealing sleeve, a circular ring limiting groove is formed on the outer surface of the sealing seat, and the inner surface of the circular ring limiting groove is fitted with the outer surface of the circular ring limiting plate.

[0010] Preferably, the opposite side of the sealing seat and the second sealing ring is tightly fitted.

[0011] The beneficial effects of the present utility model are as follows: Through the first sealing ring, three circular ring sealing plates and the circular ring groove, the position of the rotating shaft close to the pump housing is sealed and protected. Through the second sealing ring, the first circular ring rubber pad and the sealing seat, the rotating shaft is further sealed and protected, so that the liquid in the pump body is not easily drained along the surface of the rotating shaft. Through the sealing sleeve, the through port and the second circular ring rubber pad, the outermost part of the rotating shaft is sealed and protected. Through the above settings, the sealing performance between the rotating shaft and the pump housing is improved, so that the liquid in the pump housing is not easily leaked to the outside, ensuring the stable transportation of the liquid material. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art, but it is not a limitation to the protection scope of the present utility model.

[0013] Figure 1 It is a schematic structural diagram of the whole provided by the present utility model; [[ID=!1]]

[0014] Figure 2 It is a schematic internal structure diagram of the sealing sleeve provided by the present utility model;

[0015] Figure 3 It is provided by the present utility model Figure 2 The enlarged view of part A in

[0016] Figure 4 It is a side view of the first sealing ring provided by the present utility model;

[0017] Figure 5 It is a three-dimensional view of the sealing seat provided by the present utility model.

[0018] Among them, 1, pump housing; 2, rotating shaft; 3, sealing sleeve; 4, first sealing ring; 5, second sealing ring; 6, circular ring sealing plate; 7, circular ring groove; 8, first circular ring rubber pad; 9, sealing seat; 10, second circular ring rubber pad; 11, connecting block; 12, circular ring limiting plate; 13, circular ring limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Refer to Figures 1 to 5A combined mechanical seal for a pump as shown, comprising a pump casing 1 and a rotating shaft 2. The rotating shaft 2 is rotatably connected to the pump casing 1 through a bearing. On one side of the pump casing 1 and outside the rotating shaft 2, there is a sealing sleeve 3. Inside the sealing sleeve 3, there is a first sealing ring 4. On one side of the first sealing ring 4, there is a second sealing ring 5. Inside the first sealing ring 4, there are three circular ring sealing plates 6. Outside the rotating shaft 2 and corresponding to the circular ring sealing plates 6, there are circular ring grooves 7. The inner surface of the circular ring grooves 7 is in contact with the outer surface of the circular ring sealing plates 6. Inside the second sealing ring 5, there is a first circular ring rubber pad 8. The inner ring of the first circular ring rubber pad 8 is in close contact with the outer ring of the rotating shaft 2. Inside the sealing sleeve 3, there is a sealing seat 9. The inner surface of the sealing seat 9 is in contact with the outer surface of the rotating shaft 2. On one side of the sealing sleeve 3, there is a through hole, and a second circular ring rubber pad 10 is embedded in the through hole.

[0020] Furthermore, the inner ring of the second circular ring rubber pad 10 is in close contact with the outer ring of the rotating shaft 2.

[0021] Through the setting of the second circular ring rubber pad 10, the sealing performance between the sealing sleeve 3 and the rotating shaft 2 is improved.

[0022] Furthermore, on both the top and bottom of the first sealing ring 4, there are connecting blocks 11, and the two connecting blocks 11 are respectively connected to the inner wall of the adjacent sealing sleeve 3.

[0023] Through the two connecting blocks 11, the firmness of the position where the first sealing ring 4 is located is ensured.

[0024] Furthermore, inside the sealing sleeve 3, there is a circular ring limiting plate 12. On the outer surface of the sealing seat 9, there is a circular ring limiting groove 13. The inner surface of the circular ring limiting groove 13 is in contact with the outer surface of the circular ring limiting plate 12.

[0025] Through the setting of the circular ring limiting plate 12 and the circular ring limiting groove 13, the sealing performance between the sealing sleeve 3 and the sealing seat 9 is improved.

[0026] Furthermore, the opposite side of the sealing seat 9 and the second sealing ring 5 is in close contact.

[0027] Through the close contact of the opposite side of the sealing seat 9 and the second sealing ring 5, the sealing performance between the two is improved.

[0028] When the utility model is in use, through the first sealing ring 4, three circular sealing plates 6 and the circular groove 7, the position of the rotating shaft 2 close to the pump housing 1 is sealed and protected. Through the second sealing ring 5, the first circular rubber pad 8 and the sealing seat 9, the rotating shaft 2 is further sealed and protected, so that the liquid in the pump body 1 is not easily discharged along the surface of the rotating shaft 2. Through the sealing sleeve 3, the through hole and the second circular rubber pad 10, the outermost part of the rotating shaft 2 is sealed and protected. Through the above settings, the sealing performance between the rotating shaft 2 and the pump housing 1 is improved, so that the liquid in the pump housing 1 is not easily leaked to the outside, ensuring the stable transportation of the liquid material.

[0029] The above is only the specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any change or replacement that is thought of without creative work should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope defined by the claims.

Claims

1. A combined mechanical seal for a pump, characterized in that: The utility model comprises a pump casing and a rotating shaft, which is rotatably connected to the pump casing through a bearing, a sealing sleeve is provided on one side of the pump casing and on the outside of the rotating shaft, a first sealing ring is provided inside the sealing sleeve, a second sealing ring is provided on one side of the first sealing ring, three annular sealing plates are provided inside the first sealing ring, annular grooves are provided on the outside of the rotating shaft and corresponding to the annular sealing plates, the inner surface of the annular grooves is fitted with the outer surface of the annular sealing plates, a first annular rubber gasket is provided in the second sealing ring, the inner ring of the first annular rubber gasket is tightly against the outer ring of the rotating shaft, a sealing seat is provided in the sealing sleeve, the inner surface of the sealing seat is fitted with the outer surface of the rotating shaft, a through opening is provided on one side of the sealing sleeve, and a second annular rubber gasket is embedded in the through opening.

2. A combined mechanical seal for a pump according to claim 1, characterized in that: The inner ring of the second annular rubber pad is tightly against the outer ring of the rotating shaft.

3. A combined mechanical seal for a pump according to claim 1, characterized in that: The top and bottom of the first sealing ring are both provided with connecting blocks, and the two connecting blocks are respectively connected to the inner walls of the adjacent sealing sleeves.

4. A combined mechanical seal for a pump according to claim 1, characterized in that: A circular ring limiting plate is provided inside the sealing sleeve, and a circular ring limiting groove is provided on the outer surface of the sealing seat. The inner surface of the circular ring limiting groove is in contact with the outer surface of the circular ring limiting plate.

5. The combined mechanical seal for a pump according to claim 1, characterized in that: The sealing seat is tightly fitted to an opposite side of the second sealing ring.

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