CN216975784U - Vertical multi-stage pump mechanical seal adopting spring protection structure - Google Patents
Vertical multi-stage pump mechanical seal adopting spring protection structure Download PDFInfo
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- CN216975784U CN216975784U CN202220399866.4U CN202220399866U CN216975784U CN 216975784 U CN216975784 U CN 216975784U CN 202220399866 U CN202220399866 U CN 202220399866U CN 216975784 U CN216975784 U CN 216975784U
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Abstract
The utility model discloses a mechanical seal of a vertical multi-stage pump adopting a spring protection structure, which comprises a shaft sleeve (1), a static ring (2), a movable ring (3), a movable ring seat (4), a flange (5) and a spring (6); the end face of one end of the static ring (2) is propped against the end face of one end of the dynamic ring (3) to form a sealing surface; the movable ring seat (4) is arranged outside the shaft sleeve (1) and one end of the movable ring seat extends to the outer wall of the movable ring (3); the spring (6) is sleeved on the outer wall of the shaft sleeve (1) and is positioned in a sealing cavity, and the sealing cavity is positioned between the outer wall of the shaft sleeve (1) and the inner wall of the movable ring seat (4); one end of the spring (6) is propped against the movable ring (3), and the other end of the spring is propped against the end face of the first convex ring of the shaft sleeve (1). The mechanical seal is characterized in that the spring is arranged in the seal cavity, so that the spring is protected, the spring is not contacted with a medium, and the spring seat and the movable ring seat adopt an integrated structure.
Description
Technical Field
The utility model relates to the technical field of mechanical seal, in particular to a vertical multistage pump mechanical seal adopting a spring protection structure.
Background
At present, a mechanical seal comprises a shaft sleeve, a static ring, a movable ring seat and a flange; the static ring and the dynamic ring are both sleeved on the outer wall of the shaft sleeve, and one end face of the static ring is abutted against one end face of the dynamic ring to form a sealing surface; the flange is arranged outside the static ring, and the outer wall of the static ring and the inner wall of the flange are provided with sealing rings. The rotating ring is arranged in the rotating ring seat, the inner end surfaces of the rotating ring and the rotating ring seat are provided with sealing rings, and the rear ends of the sealing rings are provided with springs and spring seats. One end of the spring is propped against the movable ring seat, and the other end of the spring is propped against the step surface in the spring seat. The mechanical seal of the above structure has the following disadvantages: 1. because there is the cavity between rotating ring seat and the spring holder to can lead to inside spring and medium contact, bad medium and spring and rotating ring seat cause the jam because of the scale deposit and cause the spring to lose the compensation ability thereby to lead to mechanical seal to lose efficacy. 2. Because the movable ring seat and the spring seat adopt a split structure, the mechanical seal structure not only has a large number of mechanical seal parts, but also has complex installation and reduced seal reliability.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a vertical multi-stage pump mechanical seal which is characterized in that a spring is arranged in a seal cavity, so that the spring is protected, the spring is not contacted with a medium, and a spring seat and a movable ring seat are in an integrated structure.
In order to solve the technical problems, the utility model adopts the following technical scheme that the vertical multi-stage pump mechanical seal adopting the spring protection structure comprises a shaft sleeve, a static ring, a dynamic ring seat, a flange and a spring; the static ring and the dynamic ring are both sleeved on the outer wall of the shaft sleeve, and one end face of the static ring is abutted against one end face of the dynamic ring to form a sealing surface; the flange is arranged outside the static ring, and the outer wall of the static ring and the inner wall of the flange are provided with first sealing rings; the method is characterized in that: the movable ring seat is arranged outside the shaft sleeve, and one end of the movable ring seat extends to the outer wall of the movable ring; the spring is sleeved on the outer wall of the shaft sleeve and positioned in a sealing cavity, and the sealing cavity is positioned between the outer wall of the shaft sleeve and the inner wall of the movable ring seat; one end of the spring is abutted against the movable ring, and the other end of the spring is abutted against the end face of the first convex ring of the shaft sleeve.
A guide ring and a second sealing ring are arranged outside the shaft sleeve, the guide ring abuts against one end, close to the movable ring, of the spring, and the second sealing ring is arranged between the guide ring and the movable ring; the sealing cavity is as follows: the cavity is formed by the end face of the convex ring of the shaft sleeve, the inner wall of the movable ring seat, the outer wall of the shaft sleeve and the second sealing ring.
And a third sealing ring is arranged on the inner wall of the convex ring of the shaft sleeve.
The guide ring is connected to the outer wall of the shaft sleeve in a sliding mode.
And a second convex ring is arranged on the outer wall of the static ring, and a third sealing ring is arranged on the inner end face of the second convex ring and the step end face of the inner wall of the flange.
The outer wall of the first convex ring and the side wall of the inner boss of the movable ring seat are fixed and sealed by welding
After adopting the structure, compared with the prior art, the utility model has the following advantages and beneficial effects: the spring of the mechanical seal is arranged in the closed cavity, the spring is not contacted with a medium, the problem that the stainless steel vertical multi-stage pump is contacted with the medium by the mechanical seal spring currently used is solved, and under the condition of poor water quality or long-time use, the spring and related parts are blocked due to scaling to lose compensation capacity, so that the mechanical seal fails, and the stability and the applicability of the mechanical seal are improved. In addition, the spring seat and the movable ring seat are of an integrated structure, so that the number of parts is reduced, the assembly difficulty is reduced, and the sealing reliability is improved.
Drawings
Fig. 1 is a schematic sectional view of a mechanical seal of a vertical multi-stage pump using a spring protection structure according to the present invention.
Fig. 2 is a schematic structural view of a mechanical seal of a vertical multi-stage pump adopting a spring protection structure according to the utility model.
As shown in the figure:
1. the sealing device comprises a shaft sleeve, 2, a static ring, 3, a movable ring, 4, a movable ring seat, 5, a flange, 6, a spring, 7, a first sealing ring, 8, a guide ring, 9, a second sealing ring, 10 and a third sealing ring.
The specific implementation mode is as follows:
the present invention will be described in further detail below with reference to specific examples, but the present invention is not limited to only the following examples.
As shown in fig. 1-2, the mechanical seal of the vertical multi-stage pump adopting the spring protection structure of the utility model comprises a shaft sleeve 1, a stationary ring 2, a moving ring 3, a moving ring seat 4, a flange 5 and a spring 6; the static ring 2 and the dynamic ring 3 are both sleeved on the outer wall of the shaft sleeve 1, and one end face of the static ring 2 is abutted against one end face of the dynamic ring 3 to form a sealing surface; the flange 5 is arranged outside the static ring 2, and the outer wall of the static ring 2 and the inner wall of the flange 5 are provided with first sealing rings 7, so that the static ring and the flange are sealed.
The movable ring seat 4 is arranged outside the shaft sleeve 1, and one end of the movable ring seat extends to the outer wall of the movable ring 3; the spring 6 is sleeved on the outer wall of the shaft sleeve 1 and is positioned in a sealing cavity, and the sealing cavity is positioned between the outer wall of the shaft sleeve 1 and the inner wall of the movable ring seat 4; one end of the spring 6 is abutted against the movable ring 3, and the other end of the spring is abutted against the end face of the first convex ring of the shaft sleeve 1.
A guide ring 8 and a second sealing ring 9 are arranged outside the shaft sleeve 1, the guide ring 8 abuts against one end, close to the movable ring 3, of the spring 6, the guide ring 8 is connected to the outer wall of the shaft sleeve 1 in a sliding mode, and the second sealing ring 9 is arranged between the guide ring 8 and the movable ring 3; the elastic force of the spring 6 compresses the second seal ring 9 through the guide ring 8 and pushes the second seal ring 9. The sealing cavity is as follows: the cavity is formed by the end surface of the first convex ring of the shaft sleeve 1, the inner wall of the movable ring seat 4, the outer wall of the shaft sleeve 1 and the second sealing ring 9.
And a third sealing ring 10 is arranged on the inner wall of the convex ring of the shaft sleeve 1.
And a second convex ring is arranged on the outer wall of the static ring 2, and a third sealing ring 10 is arranged on the inner end surface of the second convex ring and the step end surface of the inner wall of the flange 5.
A completely closed sealing cavity is formed among the movable ring seat 4, the shaft sleeve 1 and the second sealing ring 9: 4 seat and the welding of axle sleeve 1 of rotating ring specifically do: the outer wall of the first convex ring and the side wall of the inner boss of the movable ring seat 4 are fixed and sealed by welding. The second sealing ring 9, the movable ring seat 4 and the shaft sleeve 1 are in interference fit, and the medium is completely isolated outside the sealing cavity; a spring 6 for elastic compensation and a guide ring for guiding compression are arranged in the sealing cavity; during operation, the elasticity of spring 6 passes through guide ring compression second sealing washer 9 to promote the second sealing washer 9, rotating ring 3 and the sealed face of quiet ring 2 and closely laminate, thereby form certain spring specific pressure and prevent to leak, and avoid bad quality of water to get into sealed chamber, thereby prevent that bad quality of water and spring 6 and rotating ring seat 4 from causing the consequence that the spring loses the compensation ability and lead to mechanical seal inefficacy because of the scale deposit to block up.
The structure and the size of the cavity of the vertical multistage pump are not changed, the installation size of the mechanical seal is not changed, the universality is excellent, the sealing effect of the second sealing ring is improved through the guide ring, the common mechanical seal in the existing market of the vertical multistage pump can be replaced, and the applicability and the stability of the mechanical seal are improved.
Claims (6)
1. A vertical multi-stage pump mechanical seal adopting a spring protection structure comprises a shaft sleeve (1), a static ring (2), a dynamic ring (3), a dynamic ring seat (4), a flange (5) and a spring (6); the static ring (2) and the moving ring (3) are sleeved on the outer wall of the shaft sleeve (1), and one end face of the static ring (2) is abutted against one end face of the moving ring (3) to form a sealing surface; the flange (5) is arranged outside the static ring (2), and the outer wall of the static ring (2) and the inner wall of the flange (5) are provided with first sealing rings (7); the method is characterized in that: the movable ring seat (4) is arranged outside the shaft sleeve (1) and one end of the movable ring seat extends to the outer wall of the movable ring (3); the spring (6) is sleeved on the outer wall of the shaft sleeve (1) and is positioned in a sealing cavity, and the sealing cavity is positioned between the outer wall of the shaft sleeve (1) and the inner wall of the movable ring seat (4); one end of the spring (6) is abutted against the movable ring (3), and the other end of the spring is abutted against the end face of the first convex ring of the shaft sleeve (1).
2. The mechanical seal of the vertical multistage pump adopting the spring protection structure as claimed in claim 1, wherein: a guide ring (8) and a second sealing ring (9) are arranged outside the shaft sleeve (1), the guide ring (8) abuts against one end, close to the movable ring (3), of the spring (6), and the second sealing ring (9) is arranged between the guide ring (8) and the movable ring (3); the sealing cavity is as follows: the cavity is formed by the end face of a first convex ring of the shaft sleeve (1), the inner wall of the movable ring seat (4), the outer wall of the shaft sleeve (1) and the second sealing ring (9).
3. The mechanical seal of the vertical multistage pump adopting the spring protection structure as claimed in claim 1, wherein: and a third sealing ring (10) is arranged on the inner wall of the convex ring of the shaft sleeve (1).
4. The mechanical seal of the vertical multistage pump adopting the spring protection structure as claimed in claim 2, wherein: the guide ring (8) is connected to the outer wall of the shaft sleeve (1) in a sliding mode.
5. The mechanical seal of the vertical multistage pump adopting the spring protection structure as claimed in claim 2, wherein: the outer wall of the static ring (2) is provided with a second convex ring, and the inner end face of the second convex ring and the step end face of the inner wall of the flange (5) are provided with a third sealing ring (10).
6. The mechanical seal of the vertical multistage pump adopting the spring protection structure as claimed in claim 2, wherein: the outer wall of the first convex ring and the side wall of the inner boss of the movable ring seat (4) are fixed and sealed by welding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122597841 | 2021-10-27 | ||
| CN2021225978413 | 2021-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975784U true CN216975784U (en) | 2022-07-15 |
Family
ID=82356101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220399866.4U Active CN216975784U (en) | 2021-10-27 | 2022-02-28 | Vertical multi-stage pump mechanical seal adopting spring protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975784U (en) |
-
2022
- 2022-02-28 CN CN202220399866.4U patent/CN216975784U/en active Active
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