CN221278078U - Mechanical sealing device of double suction pump - Google Patents
Mechanical sealing device of double suction pump Download PDFInfo
- Publication number
- CN221278078U CN221278078U CN202323462470.3U CN202323462470U CN221278078U CN 221278078 U CN221278078 U CN 221278078U CN 202323462470 U CN202323462470 U CN 202323462470U CN 221278078 U CN221278078 U CN 221278078U
- Authority
- CN
- China
- Prior art keywords
- tubular extension
- pump
- ring
- axle sleeve
- end cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims description 17
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a double entry pump mechanical seal device, relate to mechanical seal technical field, the technical scheme who adopts includes the end cover with the detachable connection of pump case, the axle sleeve of being connected with the end cover rotation, the end cover is provided with quiet ring, the axle sleeve is provided with the rotating ring, quiet ring and rotating ring cooperation constitution friction pair, the rotating ring slides relatively with the axle sleeve in axial direction, the axle sleeve still is provided with the spring holder, be provided with elastic element between spring holder and the rotating ring, the pump case is provided with tubular extension, the spring holder, elastic element all sets up inside tubular extension, the axle sleeve is kept away from rotating ring one side at the spring holder still is provided with the pump efficiency wheel, pump efficiency wheel outer wall and tubular extension inner wall clearance fit, pump efficiency wheel outer wall is provided with the screw groove. The elastic element and the spring seat are arranged in the tubular extension part, and the pump impeller and the tubular extension part form spiral seal, so that most of conveying medium can be prevented from carrying impurities into the tubular extension part to block the elastic element during operation.
Description
Technical Field
The utility model relates to the technical field of mechanical sealing, in particular to a mechanical sealing device of a double suction pump.
Background
The double suction pump is an important form of centrifugal pump and has the characteristics of high lift, large flow and the like. Conventional double suction pumps employ a packing seal between the drive shaft and the pump housing, which has been gradually replaced by a mechanical seal as environmental protection demands have increased. Because the radial dimension of the packing cavity is smaller, the radial dimension of the sealing cavity in the mechanical seal end cover is smaller, the elastic element protrudes into the pump shell and is fully contacted with the conveying medium, and only a small spring design can be adopted, so that a new problem is brought: the small springs are exposed to the conveying medium and are easily blocked by impurities entrained by the conveying medium, so that the compensation capacity is lost.
Disclosure of utility model
Aiming at the problem that the spring is easy to be blocked by impurities and loses the compensation capability in the prior art, the utility model provides a mechanical sealing device of a double suction pump.
The utility model provides the following technical scheme: the utility model provides a double entry pump mechanical seal device, includes with the end cover of pump case detachable connection, with the axle sleeve that the end cover rotates to be connected, the end cover is provided with quiet ring, the axle sleeve is provided with the moving ring, quiet ring and moving ring cooperation constitution friction pair, the moving ring in axial direction with the axle sleeve slides relatively, the axle sleeve still is provided with the spring holder, be provided with elastic element between spring holder and the moving ring, the pump case is provided with tubular extension, spring holder, elastic element all set up inside the tubular extension, the axle sleeve still is provided with the pump efficiency wheel in spring holder keeping away from moving ring one side, pump efficiency wheel outer wall with tubular extension inner wall clearance fit, pump efficiency wheel outer wall is provided with the screw groove.
Preferably, the thread groove is a multi-start thread groove.
Preferably, the elastic element is a compression spring.
Preferably, a mounting groove is formed in one side, facing the moving ring, of the spring seat, one end of the compression spring is arranged in the mounting groove, and the other end of the compression spring is connected with the moving ring.
Preferably, auxiliary sealing rings are arranged between the stationary ring and the end cover, between the movable ring and the shaft sleeve and between the end cover and the tubular extension part.
The beneficial effects of the utility model are as follows: the pump shell is provided with a tubular extension part, the elastic element and the spring seat are arranged inside the tubular extension part, the pump impeller and the tubular extension part form spiral sealing, and most conveying media can be prevented from entraining impurities to enter the tubular extension part to block the elastic element during operation.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present utility model.
Reference numerals: 10. an end cap; 11. a stationary ring; 20. a shaft sleeve; 21. a moving ring; 22. a spring seat; 23. an elastic element; 24. a pump efficiency wheel; 25. a thread groove; 30. a tubular extension.
Description of the embodiments
Embodiments of the present utility model will be described in more detail below with reference to the drawings and reference numerals, so that those skilled in the art can practice the present utility model after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model provides a mechanical sealing device of a double suction pump, which is shown in figure 1, and comprises an end cover 10 detachably connected with a pump shell and a shaft sleeve 20 rotatably connected with the end cover 10.
The end cover 10 is provided with a static ring 11, the static ring 11 is in clearance fit with the shaft sleeve 20, and the shaft sleeve 20 and the static ring 11 rotate relatively. The shaft sleeve 20 is provided with a moving ring 21, and the connecting manner of the moving ring 21 and the shaft sleeve 20 can refer to the related art, so that the moving ring 21 rotates along with the shaft sleeve, and the moving ring 21 slides relative to the shaft sleeve 20 in the axial direction. The movable ring 21 is attached to the stationary ring 11, and the shaft sleeve 20 drives the movable ring 21 to rotate, so that the stationary ring 11 and the movable ring 21 are matched to form a friction pair. The shaft sleeve 20 is also provided with a spring seat 22, an elastic element 23 is arranged between the spring seat 22 and the movable ring 21, and the elastic element 23 can adopt a spring, a corrugated pipe and the like to play roles of pre-tightening, compensation and buffering, so that the movable ring and the stationary ring are always kept in fit to form a seal. In this embodiment, the elastic element 23 adopts a compression spring, a mounting groove is provided on one side of the spring seat 22 facing the moving ring 21, one end of the compression spring is disposed in the mounting groove, and the other end is connected with the moving ring 21.
Because the radial dimension of the seal cavity in the end cover is smaller, in order to protect the elastic element and other parts, the pump shell is provided with a tubular extension 30, the end cover 10 is detachably connected with the tubular extension 30, and the spring seat 22 and the elastic element 23 are both arranged inside the tubular extension 30. Further, the sleeve 20 is further provided with a pump impeller 24 on the side of the spring seat 22 away from the moving ring 21, the outer wall of the pump impeller 24 is in clearance fit with the inner wall of the tubular extension 30, and the outer wall of the pump impeller 24 is provided with a thread groove 25. During operation, the shaft sleeve 20 drives the pump impeller 24 to rotate, so that the pump impeller 24 and the tubular extension 30 form spiral seal, a pumping effect is generated, axial thrust is generated on the conveying medium, most of the conveying medium is prevented from entering the inside of the tubular extension 30, excessive impurities are prevented from contacting with the elastic element, and blockage is effectively prevented. The thread groove 25 is a multi-head thread groove, and the sealing performance is better.
Auxiliary sealing rings are arranged between the static ring 11 and the end cover 10, between the movable ring 21 and the shaft sleeve 20 and between the end cover 10 and the tubular extension 30, so that the sealing performance is enhanced. The auxiliary sealing rings between the static ring 11 and the end cover 10 and between the movable ring 21 and the shaft sleeve 20 are O-shaped sealing rings, and the auxiliary sealing rings between the end cover 10 and the tubular extension part 30 are sealing gaskets.
The foregoing is a description of one or more embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (5)
1. The utility model provides a double suction pump mechanical seal device, includes with end cover (10) of pump case detachable connection, with axle sleeve (20) of end cover (10) swivelling joint, end cover (10) are provided with quiet ring (11), axle sleeve (20) are provided with moving ring (21), quiet ring (11) and moving ring (21) cooperation constitution friction pair, moving ring (21) in axial direction with axle sleeve (20) relative slip, axle sleeve (20) still are provided with spring holder (22), be provided with elastic element (23) between spring holder (22) and moving ring (21), its characterized in that: the pump casing is provided with tubular extension (30), spring holder (22) and elastic element (23) all set up inside tubular extension (30), axle sleeve (20) are kept away from moving ring (21) one side at spring holder (22) and still are provided with pump efficiency wheel (24), pump efficiency wheel (24) outer wall with tubular extension (30) inner wall clearance fit, pump efficiency wheel (24) outer wall is provided with screw groove (25).
2. The mechanical seal device of a double suction pump of claim 1, wherein: the thread groove (25) is a multi-start thread groove.
3. The mechanical seal device of a double suction pump of claim 1, wherein: the elastic element (23) is a compression spring.
4. A mechanical seal for a double suction pump according to claim 3, wherein: the spring seat (22) is provided with a mounting groove towards one side of the movable ring (21), one end of the compression spring is arranged in the mounting groove, and the other end of the compression spring is connected with the movable ring (21).
5. The mechanical seal device of a double suction pump of claim 1, wherein: auxiliary sealing rings are arranged between the static ring (11) and the end cover (10), between the movable ring (21) and the shaft sleeve (20) and between the end cover (10) and the tubular extension part (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323462470.3U CN221278078U (en) | 2023-12-19 | 2023-12-19 | Mechanical sealing device of double suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323462470.3U CN221278078U (en) | 2023-12-19 | 2023-12-19 | Mechanical sealing device of double suction pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221278078U true CN221278078U (en) | 2024-07-05 |
Family
ID=91698753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323462470.3U Active CN221278078U (en) | 2023-12-19 | 2023-12-19 | Mechanical sealing device of double suction pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221278078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026065383A1 (en) * | 2024-09-30 | 2026-04-02 | 襄阳五二五泵业有限公司 | Sealing structure and centrifugal feeding pump |
-
2023
- 2023-12-19 CN CN202323462470.3U patent/CN221278078U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026065383A1 (en) * | 2024-09-30 | 2026-04-02 | 襄阳五二五泵业有限公司 | Sealing structure and centrifugal feeding pump |
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