CN205207253U - Two casing centrifugal pump seal structure - Google Patents
Two casing centrifugal pump seal structure Download PDFInfo
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- CN205207253U CN205207253U CN201521063853.6U CN201521063853U CN205207253U CN 205207253 U CN205207253 U CN 205207253U CN 201521063853 U CN201521063853 U CN 201521063853U CN 205207253 U CN205207253 U CN 205207253U
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- gasket
- seal
- centrifugal pump
- seal structure
- arc wall
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Abstract
For the seal failure scheduling problems such as blowby, crackle appear that exchanges of solving the existence of prior art centrifugal pump seal structure, the utility model provides a two casing centrifugal pump seal structure is including shell body, interior casing and gasket, it is the curved arc wall of long radius that outer housing seal terminal surface root sets up the sectional form, the arc wall constitutes the loop type cavity with interior casing up end, interior casing right -hand member face is provided with the recess that the degree of depth is lighter than the gasket height, the gasket is installed in the recess. The beneficial effects of the utility model are that great radial arc wall is seted up to pump shell seal face root, makes the regional stress greatly reduced of shell body arc wall, and the crackle of effectively having avoided stress to arouse damages, and the depth of groove is less than the gasket height, controls the gasket decrement effectively, guarantees that the seal gasket compression all the time at reasonable within range, has prolonged the life of gasket, and the sealed effect of reinforcing has reduced the surface machining roughness requirement of pump fitting surface moreover, has good practicality.
Description
Technical field
The utility model relates to centrifugal pump technical field, is specifically related to a kind of double casing volute pump sealing configuration.
Background technique
Centrifugal pump relies on rotary blade that driving machine kinetic energy is passed to flowing medium, flowing medium is made to produce pressure reduction under centrifugal action, due to impeller supercharging step by step, low pressure area and zone of high pressure can be formed in the pump housing, in order to avoid zone of high pressure medium flows to low pressure area, the high and low district location between needing pump inside and outside shell carries out seal isolation.Existing sealing configuration adopts the circle radial seal of O type or metallic shim end face seal usually.Adopt the radial seal of O type circle, O type circle is easily aging, and working life is short, and reliability is low, easily leaks under high pressure, and high to the pump housing inside and outside housing concentricity requirement, easily causes seal failure; Adopt the mode of metallic shim end face seal, the pad end face pretightening force of needs is very large, and frame sealing surface Root Stress is concentrated, and easily cracks, causes frame through crack to be scrapped, and in addition, pad location is inaccurate, and easy pressure damages sealing gasket partially.Obviously, prior art centrifugal pump seal structure also exists and easily occurs blowby, the problems such as seal failure such as crackle.
Model utility content
Easily there is blowby, the problems such as seal failure such as crackle in what exist for solution prior art centrifugal pump seal structure, the utility model proposes a kind of double casing volute pump sealing configuration.
The utility model double casing volute pump sealing configuration, comprises frame, inner housing and pad; Arrange at described frame seal face root the curve bath that section configuration is large radius arc, described curve bath and inner housing upper-end surface form ring-like cavity.
Further, described inner housing right side is provided with the groove that the degree of depth is less than spacer height; Described pad is arranged in groove.
Further, described pad is flexible sealing gasket.
Further, described flexible sealing gasket is coated pad or spirotallic gasket.
The beneficial effect of the utility model double casing volute pump sealing configuration is the curve bath that pump casing seal face root offers relatively large radius, the stress in frame curve bath region is reduced greatly, effectively prevent the crackle damage that stress causes, depth of groove is less than spacer height, effectively control pad decrement, ensure gasket seal compression all the time in the reasonable scope, extend the working life of pad, strengthen sealing effect, and reduce the surface Machining roughness requirements of pump fitting surface, there is good practicability.
Accompanying drawing explanation
Fig. 1 is the utility model double casing volute pump sealed structural representation.
Fig. 2 is the utility model double casing volute pump sealing configuration A district enlarged view.
Below in conjunction with the drawings and specific embodiments, the utility model double casing volute pump sealing configuration is further described.
Embodiment
Fig. 1 is the utility model double casing volute pump sealed structural representation.Fig. 2 is the utility model double casing volute pump sealing configuration A district enlarged view.In figure, 1 be frame, 2 be inner housing, 3 be arc shaped groove, 4 be pad, 5 for groove.As seen from the figure, the utility model double casing volute pump sealing configuration, comprises frame 1, inner housing 2 and pad 4; Arrange at described frame seal face root the curve bath 3 that section configuration is large radius arc, described curve bath 3 forms ring-like cavity with inner housing upper-end surface; Described inner housing 2 right side is provided with the groove 5 that the degree of depth is less than spacer height; Described pad is arranged in groove 5.For ensureing sealing effect, described pad is flexible sealing gasket, and preferably, described flexible sealing gasket is coated pad or spirotallic gasket.
The beneficial effect of the utility model double casing volute pump sealing configuration is that pump casing root end face offers large radius curve bath, large radius curved slot arrangement makes stress obviously decline, housing uses for a long time can not crackle, reduce the crackle damage that stress causes, depth of groove is less than spacer height, effectively control pad decrement, ensure gasket seal compression all the time in the reasonable scope, extend the working life of pad, strengthen sealing effect, and reduce the surface Machining roughness requirements of pump fitting surface, there is good practicability.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included in protection domain of the present utility model.
Claims (4)
1. a double casing volute pump sealing configuration, is characterized in that, sealing structure comprises frame, inner housing and pad; Arrange at described frame seal face root the curve bath that section configuration is large radius arc, described curve bath and inner housing upper-end surface form ring-like cavity.
2. centrifugal pump seal structure according to claim 1, it is characterized in that, described inner housing right side is provided with the groove that the degree of depth is less than spacer height; Described pad is arranged in groove.
3. centrifugal pump seal structure according to claim 1, it is characterized in that, described pad is flexible sealing gasket.
4. centrifugal pump seal structure according to claim 3, it is characterized in that, described flexible sealing gasket is coated pad or spirotallic gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521063853.6U CN205207253U (en) | 2015-12-18 | 2015-12-18 | Two casing centrifugal pump seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521063853.6U CN205207253U (en) | 2015-12-18 | 2015-12-18 | Two casing centrifugal pump seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205207253U true CN205207253U (en) | 2016-05-04 |
Family
ID=55844974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521063853.6U Active CN205207253U (en) | 2015-12-18 | 2015-12-18 | Two casing centrifugal pump seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205207253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240333A (en) * | 2016-12-27 | 2018-07-03 | 株式会社丰田自动织机 | Compressor |
-
2015
- 2015-12-18 CN CN201521063853.6U patent/CN205207253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240333A (en) * | 2016-12-27 | 2018-07-03 | 株式会社丰田自动织机 | Compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |