CN204327503U - Vertical multi-stage centrifugal pump axial thrust balancing devices - Google Patents
Vertical multi-stage centrifugal pump axial thrust balancing devices Download PDFInfo
- Publication number
- CN204327503U CN204327503U CN201420725406.1U CN201420725406U CN204327503U CN 204327503 U CN204327503 U CN 204327503U CN 201420725406 U CN201420725406 U CN 201420725406U CN 204327503 U CN204327503 U CN 204327503U
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- CN
- China
- Prior art keywords
- impeller
- ring
- fixed plate
- restrictor ring
- back shroud
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- 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 discloses a kind of vertical multi-stage centrifugal pump axial force self-balancing device, it is characterized in that the pump housing and impeller eye outer rim contacting point are provided with lower friction ring, are provided with friction ring with upper-end contact place of impeller outlet place, back shroud of impeller is provided with restrictor ring, pump shaft after impeller is fixed with the fixed plate corresponding with restrictor ring, ensures during assembling to leave suitable gap between the restrictor ring on fixed plate and back shroud of impeller.During work, rotor part can fluctuate along with the change of pressure before and after impeller, and the restrictor ring on such back shroud of impeller and the gap between fixed plate also change thereupon, thus the pressure reduction changed before and after impeller achieves the object of axial force self-balancing.
Description
One, technical field
The utility model relates to mechanical engineering pump class technical field, specifically a kind of axial force self-balancing device of vertical multi-stage centrifugal pump.
Two, background technique
At present, the axial force of centrifugal pump mainly balances by equalizing orifice, balancing drum, Balance disc, but equalizing orifice must be carried on the back choma with impeller and combinationally uses, be usually used in single-stage pump, and balancing drum and Balance disc complex structure, rate of fault is high, is one of parts of very easily breaking down of multistage pump.
Three, summary of the invention
In order to solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of axial force self-balancing device of vertical multi-stage centrifugal pump.
Solving the technological scheme that technical problem of the present utility model adopts is: the axial force self-balancing device of this pump is primarily of the pump housing, impeller, restrictor ring, lower friction ring, fixed plate, upper friction ring composition; The pump housing and impeller eye outer rim contacting point are provided with lower friction ring, are provided with friction ring with upper-end contact place of impeller outlet place, and back shroud of impeller is provided with restrictor ring, and the pump shaft after impeller is fixed with the fixed plate corresponding with restrictor ring.
The self balancing principle of the axial force self-balancing device of this pump is: because Action of Gravity Field impeller is sagging under normal state, and the restrictor ring of impeller and the gap of fixed plate increase; Because impeller back of the body choma radial dimension is greater than preoral loop when pump normally works, under the pressure that impeller produces, impeller upwards promotes, the gap shrinks of restrictor ring and fixed plate, impeller backside pressure raises, impeller floats downwards under pressure, rotor part like this can fluctuate along with the change of pressure before and after impeller, restrictor ring on such back shroud of impeller and the gap between fixed plate also change (namely leakage rate changes) thereupon, thus the pressure reduction changed before and after impeller achieves the object of axial force self-balancing.
The beneficial effects of the utility model are: do not need other Equilibrators additional, and impeller just effectively can realize the self balancing of axial force by the structure of self.
Four, accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the sectional structure schematic diagram of the axial force self-balancing device of the utility model vertical multi-stage centrifugal pump.
In figure: 1. the pump housing, 2. impeller, 3. restrictor ring, 4. descend friction ring, 5. fixed plate, 6. go up friction ring.
Five, embodiment
In the accompanying drawings, the axial force self-balancing device of the utility model vertical multi-stage centrifugal pump is primarily of the pump housing, impeller, restrictor ring, lower friction ring, fixed plate, upper friction ring composition; The pump housing 1 and impeller 2 entrance outer rim contacting point are provided with lower friction ring 4, are provided with friction ring 6 with upper-end contact place, impeller 2 outlet port, and impeller 2 back shroud is provided with restrictor ring 3; Pump shaft after impeller 2 is fixed with the fixed plate 5 corresponding with restrictor ring 3, ensures during assembling to leave suitable gap between the restrictor ring 3 on fixed plate 5 and back shroud of impeller.During work, rotor part can fluctuate along with the change of pressure before and after impeller, restrictor ring on such back shroud of impeller and the gap between fixed plate also change (namely leakage rate changes) thereupon, thus the pressure reduction changed before and after impeller achieves the object of axial force self-balancing.
Claims (1)
1. a vertical multi-stage centrifugal pump axial force self-balancing device, is made up of the pump housing, impeller, restrictor ring, lower friction ring, fixed plate, upper friction ring; It is characterized in that: the described pump housing (1) and impeller (2) entrance outer rim contacting point are provided with lower friction ring (4), are provided with friction ring (6) with upper-end contact place, impeller (2) outlet port, and impeller (2) back shroud is provided with restrictor ring (3); Pump shaft after impeller (2) is fixed with the fixed plate (5) corresponding with restrictor ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725406.1U CN204327503U (en) | 2014-11-20 | 2014-11-20 | Vertical multi-stage centrifugal pump axial thrust balancing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725406.1U CN204327503U (en) | 2014-11-20 | 2014-11-20 | Vertical multi-stage centrifugal pump axial thrust balancing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204327503U true CN204327503U (en) | 2015-05-13 |
Family
ID=53163870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420725406.1U Expired - Fee Related CN204327503U (en) | 2014-11-20 | 2014-11-20 | Vertical multi-stage centrifugal pump axial thrust balancing devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204327503U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570186A (en) * | 2016-03-04 | 2016-05-11 | 浙江工业大学 | Single-stage centrifugal pump capable of achieving self balance of axial force |
| CN106468268A (en) * | 2015-08-17 | 2017-03-01 | 财团法人工业技术研究院 | Magnetic suspension rotor mechanism |
| CN112761964A (en) * | 2020-12-18 | 2021-05-07 | 南通华兴石油仪器有限公司 | Constant-speed circulation ultrahigh-pressure pump for wellhead fluid |
-
2014
- 2014-11-20 CN CN201420725406.1U patent/CN204327503U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468268A (en) * | 2015-08-17 | 2017-03-01 | 财团法人工业技术研究院 | Magnetic suspension rotor mechanism |
| CN106468268B (en) * | 2015-08-17 | 2019-01-04 | 财团法人工业技术研究院 | Magnetic suspension rotor mechanism |
| CN105570186A (en) * | 2016-03-04 | 2016-05-11 | 浙江工业大学 | Single-stage centrifugal pump capable of achieving self balance of axial force |
| CN112761964A (en) * | 2020-12-18 | 2021-05-07 | 南通华兴石油仪器有限公司 | Constant-speed circulation ultrahigh-pressure pump for wellhead fluid |
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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: 20150513 Termination date: 20171120 |