CN2672337Y - Novel seal structure multi stage centrifugal pump - Google Patents
Novel seal structure multi stage centrifugal pump Download PDFInfo
- Publication number
- CN2672337Y CN2672337Y CN 03273877 CN03273877U CN2672337Y CN 2672337 Y CN2672337 Y CN 2672337Y CN 03273877 CN03273877 CN 03273877 CN 03273877 U CN03273877 U CN 03273877U CN 2672337 Y CN2672337 Y CN 2672337Y
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- China
- Prior art keywords
- centrifugal pump
- choma
- stage casing
- segment
- multistage centrifugal
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Abstract
The utility model relates to a new novel seal structure multi stage centrifugal pump. An electrical machine and the pump are connected in a coaxial mode by an extended shaft which is connected into a whole, and the pump part comprises a water inflow segment 1, an intermediate segment 2, a vane wheel 3, a seal gasket 4, a water outflow segment 5, a mechanical seal 6, a shaft sleeve 7, a draw rod 8, etc. The novel seal structure multi stage centrifugal pump is characterized in that the water inflow segment 1 and the water outflow segment 5 adopt castings. Steel plates are stamped, stretched and welded to from the intermediate segment 2, and the intermediate segment 2 is provided with a floating seal ring 22. The water inflow segment 1, the intermediate segment 2 and the water outflow segment 5 are sealed by the seal gasket 4. the seal structure is simple and reliable.
Description
The utility model relates to a kind of multistage centrifugal pump of novel sealing structure, and specifically, it relates between the multistage centrifugal pump stage casing and the sealing of impeller eye.
The multistage pump of cast iron type processed one 3 to 5mm dark groove in the stage casing in the past, and the seal with elastometic washer of O shape is adopted in the sealing between each section; The multistage pump of stamped steel template bends a V-type circular groove in the stage casing, the sealing between each section also is to adopt the seal with elastometic washer of O shape.The stage casing of stamped steel template multistage pump is difficult to process the groove of putting O shape rubber ring; If bend a V-type circular groove in the stage casing of stamped steel template multistage pump, technology is complicated, and precision also is difficult to guarantee.
At above situation, the utility model provides a kind of novel sealing structure: be provided with one 0.1 to 0.5mm dark groove at stage casing tooth actinal surface, during assembling, place a sealing gasket in groove location, can realize the sealing between each section.Compare with prior art, have simple in structurely, easily manufactured, cost is low, seals advantages such as reliable.
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the structural representation of the multistage centrifugal pump of novel sealing structure
Fig. 2 is that the A of Fig. 1 is to view
Fig. 3 is that the B of Fig. 1 is to view
Fig. 4 is the structural drawing in stage casing
Fig. 5 is the C-C view of Fig. 4
Fig. 6 is the zoomed-in view of unsteady labyrinth seal (22)
Fig. 7 is a sealing configuration enlarged view between the stage casing
Fig. 8 is the structural drawing of sealing gasket
Fig. 1 has represented the structural representation of multistage centrifugal pump of the novel sealing structure of the utility model form of implementation.Multistage centrifugal pump shown in the figure, motor is connected by the extension shaft that fuses is coaxial with pump, and pump partly is made up of inlet segment (1), stage casing (2), impeller (3), sealing gasket (4), water exit end (5), mechanical seal (6), axle sleeve (7), pull bar (8) etc.; Inlet segment (1) and water exit end (5) adopt molten wax casting; Stage casing (2) with the steel plate punching press, stretch, be welded; Impeller (3) with the steel plate punching press, stretch, be welded; Adopt sealing gasket (4) sealing between inlet segment (1), stage casing (2), the water exit end (5), during assembling, pull bar (8) tension inlet segment (1) and motor front end, inlet segment (1) compresses the sealing gasket (4) between inlet segment (1) and stage casing (2), stage casing (2) compresses the packing (4) between stage casing (2) and the water exit end (5), form sealing configuration, sealing is simple and reliable for structure.
Fig. 2 be the A of Fig. 1 to view, among this embodiment, the outer surface of water intake is unequal-sided polygonal (61), when being installed into water pipe, block polygonal (61) with spanner earlier, screw intake pipe again, prevent inlet segment (1) rotational displacement, can be installed into water pipe easily like this.
Fig. 3 be the B of Fig. 1 to view, among this embodiment, the outer surface cross section of water outlet is unequal-sided polygonal (51), the cross section is that unequal-sided polygonal (51) can conveniently be installed outlet pipe, when outlet pipe is installed, block polygonal (51) with spanner earlier, screw outlet pipe again.
Fig. 4 is the structural drawing of stage casing (2), and among this embodiment, stage casing (2) are made up of with stator (23) sheet (71), seal ring (72), choma outer plate (73) in middle section body (21), the choma.Through punching press, stretching and the cylindrical part of shape, an end of cylindrical part has a boss to middle section body (21) by the steel plate of a 0.5mm to 3mm, and there is a cylindrical hole that inwardly turns over the bottom surface of boss; The other end forms a tooth mouth by the interior technology of turning over, and the tooth bore is identical with the boss radial dimension to size, and the tooth actinal surface is provided with one 0.1 to 0.5mm groove; Fluctuate hermetical ring (22) is made up of sheet in the choma (71), seal ring (72), choma outer plate (73), wherein sheet is welded on the middle section body (21) in the choma, choma outer plate (73) is an interference fit with the interior sheet (71) of choma, and seal ring (72) is placed on choma outer plate (73) and the interior formed space of sheet (71) of choma; Stator (23) is made up of stator blade (81) and stator cover plate (82), and stator blade (81) is the bar with certain radian by the steelplate punching shaping of two above 1mm to 4mm; Stator cover plate (82) is the steel plate that a circular hole is opened in a centre; Stator blade (81) is welded on the middle section body (21), and stator cover plate (82) is welded on the stator blade (81), makes it to become single piece.
Fig. 5 is the C-C view (illustrating slightly) of Fig. 4.
Fig. 6 is the zoomed-in view of unsteady labyrinth seal, and among this embodiment, sheet (71), seal ring (72) constitute the labyrinth seal of floating with choma outer plate (73) in middle section body (21), the choma.Driven by motor impeller (3) rotation, impeller (3) drives seal ring (72) and rotates, and forms the labyrinth seal of floating, and effectively reduces liquid return, reaches to improve the pump efficiency purpose.
In sum, the utility model provide a kind of feasible process, rational in infrastructure, effect obviously, the novel sealing structure of a kind of multistage centrifugal pump of function admirable, be a kind of novelty, progress and new design with practicability.The above is concrete enforcement example of the present utility model and the know-why used, do not departing from the equivalence change that principle of the present utility model is done, when the effect that it produced is no more than the content that specification and accompanying drawing contain, all should be in scope of the present utility model, explanation hereby.
Claims (7)
1. multistage centrifugal pump, motor is connected by the extension shaft that fuses is coaxial with pump, and pump partly is made up of inlet segment (1), stage casing (2), impeller (3), sealing gasket (4), water exit end (5), mechanical seal (6), axle sleeve (7), pull bar (8) etc.; Inlet segment (1) and water exit end (5) adopt foundry goods; Stage casing (2), impeller (3) adopt stamping part, it is characterized in that adopting between inlet segment (1), stage casing (2), the water exit end (5) sealing gasket (4) sealing.
2. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that, described stage casing (2) mainly is made up of middle section body (21), stator (23) and stator cover plate (82), middle section body (21) is by the cylindrical part of the steel plate stretch forming of 0.5mm to 3mm, one end of cylindrical part is provided with a boss, the other end is inverted to form a tooth mouth, and the tooth bore is identical with the boss radial dimension to size, and the tooth actinal surface is provided with one 0.1 to 0.5mm groove.
3. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that stage casing (2) constitute the labyrinth seal (22) of floating by sheet (71), seal ring (72) in middle section body (21), the choma with choma outer plate (73).
4. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that, the described unsteady labyrinth seal of claim 3 (22), sheet (71) is welded on the middle section body (21) in its choma, choma outer plate (73) is an interference fit with the interior sheet (71) of choma, and seal ring (72) is placed on choma outer plate (73) and the interior formed space of sheet (71) of choma.
5. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that described inlet segment (1) is provided with a water intake, the outer surface cross section of water intake is unequal-sided polygonal (61); The radially-outer surface that inlet segment (1) is connected with inlet tube is convex surface or the conical surface or sphere (62), and the radial surface that inlet segment (1) is connected with stage casing (2) is provided with two with upper lug (c).
6. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that the annular ring that described sealing gasket (4) is made of the material of the plastically deformable of a 0.2～2mm.
7. according to the described a kind of multistage centrifugal pump of claim 1, it is characterized in that described water exit end (5) is provided with a water outlet, the outer surface of water outlet is unequal-sided polygonal (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03273877 CN2672337Y (en) | 2003-08-28 | 2003-08-28 | Novel seal structure multi stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03273877 CN2672337Y (en) | 2003-08-28 | 2003-08-28 | Novel seal structure multi stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672337Y true CN2672337Y (en) | 2005-01-19 |
Family
ID=34473659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03273877 Expired - Fee Related CN2672337Y (en) | 2003-08-28 | 2003-08-28 | Novel seal structure multi stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2672337Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100572819C (en) * | 2005-08-03 | 2009-12-23 | 阳江市新力工业有限公司 | A kind of single stage centrifugal pump |
| CN102734173A (en) * | 2012-06-28 | 2012-10-17 | 合肥恒大江海泵业股份有限公司 | High-lift and interstage leakage-free multi-level submersible pump |
| CN105952650A (en) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | High-strength multistage horizontal water pump |
| CN105952683A (en) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | Pump head structure of horizontal water pump |
| CN107313780A (en) * | 2017-08-04 | 2017-11-03 | 中船重型装备有限公司 | Novel sealing form shield machine center steering body |
-
2003
- 2003-08-28 CN CN 03273877 patent/CN2672337Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100572819C (en) * | 2005-08-03 | 2009-12-23 | 阳江市新力工业有限公司 | A kind of single stage centrifugal pump |
| CN102734173A (en) * | 2012-06-28 | 2012-10-17 | 合肥恒大江海泵业股份有限公司 | High-lift and interstage leakage-free multi-level submersible pump |
| CN105952650A (en) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | High-strength multistage horizontal water pump |
| CN105952683A (en) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | Pump head structure of horizontal water pump |
| CN107313780A (en) * | 2017-08-04 | 2017-11-03 | 中船重型装备有限公司 | Novel sealing form shield machine center steering body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |