CN203892268U - Single-stage pump structure capable of balancing axial force - Google Patents
Single-stage pump structure capable of balancing axial force Download PDFInfo
- Publication number
- CN203892268U CN203892268U CN201320876539.4U CN201320876539U CN203892268U CN 203892268 U CN203892268 U CN 203892268U CN 201320876539 U CN201320876539 U CN 201320876539U CN 203892268 U CN203892268 U CN 203892268U
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- CN
- China
- Prior art keywords
- impeller
- pump
- axial force
- return port
- structure capable
- 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.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to a single-stage pump structure capable of balancing axial force. The single-stage pump structure capable of balancing axial force comprises a pump body, a pump cover and an impeller. The single-stage pump structure capable of balancing axial force is characterized in that a first backflow hole is formed in the pump cover, is communicated with a rear sealing ring of the impeller and is communicated with an inlet end of the pump body through a water return pipe; a second backflow hole is formed in the inlet end of the pump body, and the first backflow hole is connected with the second backflow hole through the water return pipe. The single-stage pump structure capable of balancing axial force has the advantages that the axial force is balanced, the flow state of the inlet of the impeller is not destroyed, the stable state of inlet liquid flow of the pump is guaranteed, and the demand of the hydraulic power of the inlet liquid flow is met.
Description
Technical field
The utility model relates to centrifugal pump field, is specifically related to a kind of single-stage pump structure of balancing axial thrust.
Background technique
Existing single-stage pump (SLS, SLW) is all to coordinate rear choma to carry out balancing axial thrust by boring equalizing orifice on back shroud of impeller conventionally.Existing structure by; 1, the pump housing, 2, impeller, 3, the composition such as pump cover.There is following shortcoming in it.
1, the high pressure water that equalizing orifice is revealed is directly back to the import of impeller, and import liquid stream is impacted, and makes impeller inlet a fluid stream cause disorder, affects the efficiency of pump.
2, while boring equalizing orifice at back shroud of impeller place, easily damage impeller intra vane.
3, because the burr that bores equalizing orifice generation should not be rejected.
Model utility content
The purpose of this utility model is to provide a kind of single-stage pump structure of balancing axial thrust, does not destroy impeller inlet place fluidised form in balancing axial thrust, ensures the stable state of pump inlet liquid stream, meets the waterpower of import liquid stream.Improve the anti-cavitation performance of pump, meet pump and normally work under the working condition of high temperature and low net positive suction head.
To achieve these goals, the technical solution of the utility model is as follows: a kind of single-stage pump structure of balancing axial thrust, comprise the pump housing, pump cover, impeller, it is characterized in that having on pump cover the first return port, be communicated to choma after impeller, described the first return port is communicated with pump housing entrance point by return pipe.Described pump housing entrance point offers the second return port, and described the first return port is connected with the second return port by return pipe.According to preferred embodiment of the present utility model, described return pipe is copper tube.
Effect and advantage that this model utility can reach are listed below:
1, equilibrirm water flow to pump inlet place through return pipe, and impeller inlet liquid levelling is not surely hit, and hydraulics during more near design, improves pump cavitation resistive property;
2, need to not bore equalizing orifice at back shroud of impeller, having avoided may be to the destruction of blade, has avoided boring the adverse effect of equalizing orifice to impeller waterpower.
Brief description of the drawings
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the enlarged view at A place in Fig. 2.
Embodiment
The single-stage pump structure of this new structure is by following part: 1, the pump housing, 2, impeller, 3, pump cover, 4, the composition such as return pipe.
On the basis of existing single-stage pump structure, cancel the structure of boring equalizing orifice on back shroud of impeller, change into and on the pump cover of corresponding part, bore the first return port 5, described the first return port 5 is communicated to choma (see figure 2) after impeller.Described pump housing entrance point is provided with the second return port 6, configure a return pipe 4 by copper tube, the second return port 6 that equilibrirm water is caused to pump housing entrance point from the first return port 5, this structure has adopted configuration return pipe 4, equilibrirm water is caused to import axial force is carried out to balance.Not only realize axial force balance, also avoided, because boring the adverse effect of equalizing orifice to impeller waterpower, having improved pump cavitation resistive property.The first return port sectional area is the area of 5 ~ 8 times of sealing ring gaps; Return pipe caliber is suitable with return port aperture.As shown in the figure, be provided with the impeller ring and the casing wear ring that cooperatively interact between impeller and pump cover, sealing ring gap refers to the gap d between impeller ring and casing wear ring; The concrete numerical value of d parameter when designing is determined; Sealing ring gap area is taking pump shaft line as gyration center, the annulus area that d is width.
Claims (3)
1.
a kind of single-stage pump structure of balancing axial thrust, comprise the pump housing, pump cover, impeller, between impeller and pump cover, be provided with the impeller ring and the casing wear ring that cooperatively interact, sealing ring gap refers to the gap between impeller ring and casing wear ring, it is characterized in that having on pump cover the first return port, be communicated to choma after impeller, described the first return port is communicated with pump housing entrance point by return pipe, and the first return port sectional area is the area of 5 ~ 8 times of sealing ring gaps.
2.
single-stage pump structure as claimed in claim 1, is characterized in that described pump housing entrance point offers the second return port, and described the first return port is connected with the second return port by return pipe.
3.
single-stage pump structure as claimed in claim 1, is characterized in that described return pipe is copper tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320876539.4U CN203892268U (en) | 2013-12-30 | 2013-12-30 | Single-stage pump structure capable of balancing axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320876539.4U CN203892268U (en) | 2013-12-30 | 2013-12-30 | Single-stage pump structure capable of balancing axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892268U true CN203892268U (en) | 2014-10-22 |
Family
ID=51718679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320876539.4U Expired - Fee Related CN203892268U (en) | 2013-12-30 | 2013-12-30 | Single-stage pump structure capable of balancing axial force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892268U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508302A (en) * | 2016-01-15 | 2016-04-20 | 江苏大学 | Refluxing device for decreasing axial force of centrifugal pump |
| CN105604952A (en) * | 2016-01-03 | 2016-05-25 | 詹白勺 | Vertical centrifugal oil pump |
| CN113107866A (en) * | 2021-04-16 | 2021-07-13 | 山东天瑞重工有限公司 | Vacuum pump capable of adjusting wheel back pressure |
-
2013
- 2013-12-30 CN CN201320876539.4U patent/CN203892268U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604952A (en) * | 2016-01-03 | 2016-05-25 | 詹白勺 | Vertical centrifugal oil pump |
| CN105604952B (en) * | 2016-01-03 | 2018-02-13 | 浙江水泵总厂有限公司 | Vertical centrifugal oil pump |
| CN105508302A (en) * | 2016-01-15 | 2016-04-20 | 江苏大学 | Refluxing device for decreasing axial force of centrifugal pump |
| CN113107866A (en) * | 2021-04-16 | 2021-07-13 | 山东天瑞重工有限公司 | Vacuum pump capable of adjusting wheel back pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20201230 |