CN202418010U - Axial force balancing structure of multistage centrifugal pump - Google Patents
Axial force balancing structure of multistage centrifugal pump Download PDFInfo
- Publication number
- CN202418010U CN202418010U CN2011205357553U CN201120535755U CN202418010U CN 202418010 U CN202418010 U CN 202418010U CN 2011205357553 U CN2011205357553 U CN 2011205357553U CN 201120535755 U CN201120535755 U CN 201120535755U CN 202418010 U CN202418010 U CN 202418010U
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- China
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- pressure impeller
- impeller
- sealing opening
- opening ring
- axial force
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Abstract
The utility model relates to an axial force balancing structure of a multistage centrifugal pump. The structure comprises an impeller, a sealing opening ring and a plurality of balancing holes, wherein the impeller comprises a high-pressure impeller and a low-pressure impeller, the sealing opening ring comprises a high-pressure impeller front sealing opening ring, a low-pressure impeller front sealing opening ring and a low-pressure impeller rear sealing opening ring, and balancing holes are distributed uniformly on roots of a high-pressure impeller and a low-pressure impeller respectively and penetrate through the front portions and rear portions of the impellers. The balance of an axial force is achieved during the working process of the multistage centrifugal pump, the structure of the pump is simplified, the production cost and the installation cost are reduced and the maintenance cycle is shortened.
Description
Technical field
The utility model relates to a kind of axial force in multi-stage centrifugal pump equilibrium structure.
Background technique
Axial force balance is a very important problem in multistage centrifugal pump, and as the core component-rotor of pump work, it is very big influenced by this.Main shaft when work, if bear very big axial force, so the rotor on the main shaft will be under the pulling of this axial force axial motion, contact with the solid part, cause the damage of pump component consequently can not work.Increase the thrust load that bearing bore simultaneously, even can exceed the bearing maximum weighted limit, caused the bearing heel and toe wear, more can stay very big potential safety hazard at work.Because the wearing and tearing of rotor and bearing have increased the maintenance cost of pump and the ordinary production cycle that shortens pump.Cause the unnecessary economic loss and the wasting of resources.
Thereby; Reducing the axial force of main shaft or eliminate axial force, is the necessary guarantee of pump safe and efficient work, and nowadays many pumps manufacturing enterprise is all in the research of being devoted to reduce axial force; Letting steady, safe, long-time, the low-loss work of pump, is the important research and development target of pump from now on.
Summary of the invention
The purpose of the utility model is a kind of axial force in multi-stage centrifugal pump equilibrium structure of design, solves axial equilibrium of forces problem in the multistage centrifugal pump working procedure, simplifies pump structure, reduces manufacture cost and installation, maintenance cycle.
The technical solution of the utility model is:
A kind of axial force in multi-stage centrifugal pump equilibrium structure comprises impeller, sealing opening ring; Said impeller comprises high-pressure impeller 1, low pressure impeller 2; Said sealing opening ring comprises sealing opening ring 4 behind sealing opening ring 3 before the high-pressure impeller, the high-pressure impeller; Sealing opening ring 5 before the low pressure impeller; Sealing opening ring 6 after the low pressure impeller, and its special way is: also comprise a plurality of equalizing orifices that are uniformly distributed with 8 that are separately positioned on low pressure impeller and high-pressure impeller root and perforation impeller front and back.
The little Spielpassung of sealing opening ring 6 employings after sealing opening ring 5 and the low pressure impeller before above-mentioned low pressure impeller 2 and the low pressure impeller.
The little Spielpassung of sealing opening ring 4 employings behind sealing opening ring 3 and the high-pressure impeller before above-mentioned high-pressure impeller 1 and the high-pressure impeller.
Above-mentioned high-pressure impeller 1 is arranged with low pressure impeller 2 vertically back-to-back.
Also comprise the thrust-bearing 7 that is arranged on high-pressure impeller shaft extension end on the main shaft.
The advantage that the utlity model has is:
1, the utility model axial force balance structure is compared elimination axial force that can be bigger with traditional multistage pump Equilibrator-Balance disc, balancing drum; Reduce the pump leakage of working medium in the course of the work simultaneously, improved volumetric efficiency, make the service behaviour of pump and the working life of pump component; Bearing and rotor safety coefficient increase substantially; Thereby steady more, the safety of the operation that makes pump is reliable, efficient.
2, the utility model has been simplified pump structure; Rely on operating rotor self, thrust-bearing with and relatively layout just can reduce so that eliminate axial force fully; Do not need to increase again device-Balance disc, balancing drum of special balancing axial thrust etc.; Make the overall structure of pump compact more, simple, reduce the pump manufacture cost, reduce process and the cycle of pump in installation, maintenance.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of Fig. 1 mesolow wheel member;
Fig. 3 is the structural representation of Fig. 1 mesohigh wheel member;
Fig. 4 is a thrust bearing schematic representation among Fig. 1;
Wherein: 1-high-pressure impeller, 2-low pressure impeller, sealing opening ring before the 3-high-pressure impeller, sealing opening ring behind the 4-high-pressure impeller, sealing opening ring before the 5-low pressure impeller, sealing opening ring after the 6-low pressure impeller, 7-thrust-bearing, 8-equalizing orifice.
Embodiment
To shown in Figure 3, the utility model comprises impeller, sealing opening ring, is arranged on a plurality of equalizing orifices that are uniformly distributed with 8 and the thrust-bearing of impeller root and perforation impeller front and back like Fig. 1; Impeller comprises high-pressure impeller 1, low pressure impeller 2, and sealing opening ring comprises sealing opening ring 4 behind sealing opening ring 3 before the high-pressure impeller, the high-pressure impeller, sealing opening ring 5 before the low pressure impeller, and sealing opening ring 6 after the low pressure impeller; The little Spielpassung of sealing opening ring 6 employings after sealing opening ring 5 and the low pressure impeller before low pressure impeller 2 and the low pressure impeller; The little Spielpassung of sealing opening ring 4 employings behind sealing opening ring 3 and the high-pressure impeller before high-pressure impeller 1 and the high-pressure impeller; High-pressure impeller 1 is arranged with low pressure impeller 2 vertically back-to-back.
The high-pressure impeller equilibrium structure by high-pressure impeller 1, high-pressure impeller before behind the sealing opening ring 3, high-pressure impeller sealing opening ring 4 form, the three is combined together the axial force that produces just can balance high-pressure impeller self work the time through the equalizing orifice on the high-pressure impeller again; The low pressure impeller equilibrium structure by low pressure impeller 2, low pressure impeller before behind the sealed mouth 5, low pressure impeller sealing opening ring 6 form, the three is combined together the axial force that produces just can the work of balance low pressure impeller self time through the equalizing orifice on the low pressure impeller again.
Specifically; Rely on the earial drainage of back sealing opening ring and equalizing orifice; Make from impeller outlet and leak into high-pressure medium the back shroud gap through sealing opening ring; Equalizing orifice communicates with the low piezodielectric of impeller inlet, front shroud, impeller inlet side pressure is distributed distribute consistent near perhaps with the back shroud side pressure.Calculate the physical dimension of each parts of appropriate design through waterpower; Make the pressure distribution of both sides identical; But its axial force need guarantee to equate between the residual axial force numerical value perhaps approaching with regard to homeostasis as far as possible when designing simultaneously like this, and residual axial force can be offset or reduce in the integral layout balance as much as possible; Through thrust-bearing the axial force of final residual is offset fully then, made pump just can eliminate axial force need not to add under the situation of Equilibrator.
The utility model is through this kind system design and calculating; Improved the working life and the security of system coefficient of rotor critical speed and thrust-bearing, the prior pump structure of having simplified has improved pump performance, and multistage centrifugal pump is to utilize Balance disc or balancing drum to come balancing axial thrust usually; Pump structure and manufacture cost have not only been increased; And cause fluid to reveal, and reduced pump operation efficient, increased pump group volume and weight and noise etc.Experimental verification this programme has played good effect for the axial force in multi-stage centrifugal pump balance, simultaneously guaranteed the hydraulic performance of centrifugal pump group.This structure can well be eliminated axial force, compares with Equilibrator in the past, and is not only efficient, and makes simply, convenient, is the another major progress of multi-stage pump axial force balanced growth.
Claims (5)
1. an axial force in multi-stage centrifugal pump equilibrium structure comprises impeller, sealing opening ring; Said impeller comprises high-pressure impeller (1), low pressure impeller (2); Said sealing opening ring comprises sealing opening ring (4) behind sealing opening ring (3) before the high-pressure impeller, the high-pressure impeller; Sealing opening ring (5) before the low pressure impeller; Sealing opening ring after the low pressure impeller (6) is characterized in that: also comprise a plurality of equalizing orifices that are uniformly distributed with (8) that are separately positioned on low pressure impeller and high-pressure impeller root and perforation impeller front and back.
2. axial force in multi-stage centrifugal pump equilibrium structure according to claim 1 is characterized in that: sealing opening ring (6) adopts little Spielpassung after preceding sealing opening ring (5) of low pressure impeller (2) and low pressure impeller and the low pressure impeller.
3. axial force in multi-stage centrifugal pump equilibrium structure according to claim 1 is characterized in that: sealing opening ring (4) adopts little Spielpassung behind preceding sealing opening ring (3) of high-pressure impeller (1) and high-pressure impeller and the high-pressure impeller.
4. according to claim 1 or 2 or 3 described axial force in multi-stage centrifugal pump equilibrium structures, it is characterized in that: said high-pressure impeller (1) is arranged with low pressure impeller (2) vertically back-to-back.
5. axial force in multi-stage centrifugal pump equilibrium structure according to claim 4 is characterized in that: also comprise the thrust-bearing (7) that is arranged on high-pressure impeller shaft extension end on the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205357553U CN202418010U (en) | 2011-12-14 | 2011-12-14 | Axial force balancing structure of multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205357553U CN202418010U (en) | 2011-12-14 | 2011-12-14 | Axial force balancing structure of multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202418010U true CN202418010U (en) | 2012-09-05 |
Family
ID=46742780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205357553U Expired - Lifetime CN202418010U (en) | 2011-12-14 | 2011-12-14 | Axial force balancing structure of multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202418010U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422499A (en) * | 2015-12-08 | 2016-03-23 | 中国船舶重工集团公司第七一九研究所 | Self-balancing axial force adjusting structure |
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
| CN110043324A (en) * | 2019-03-25 | 2019-07-23 | 华电电力科学研究院有限公司 | A kind of axial thrust balancing devices and design method for single-stage radial turbines expanding machine |
-
2011
- 2011-12-14 CN CN2011205357553U patent/CN202418010U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
| CN108496010B (en) * | 2015-12-07 | 2021-04-02 | 流体处理有限责任公司 | Opposed impeller wear ring undercut for counteracting axial thrust generated in a multistage pump |
| CN105422499A (en) * | 2015-12-08 | 2016-03-23 | 中国船舶重工集团公司第七一九研究所 | Self-balancing axial force adjusting structure |
| CN110043324A (en) * | 2019-03-25 | 2019-07-23 | 华电电力科学研究院有限公司 | A kind of axial thrust balancing devices and design method for single-stage radial turbines expanding machine |
| CN110043324B (en) * | 2019-03-25 | 2023-11-28 | 华电电力科学研究院有限公司 | Axial force balancing device for single-stage radial turbine expander and design method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210106 Address after: 710077 No. 78, Kam Yip Road, hi tech Zone, Shaanxi, Xi'an Patentee after: XI'AN AEROSPACE PUMPS Co.,Ltd. Address before: 710077 No. 78, Kam Yip Road, hi tech Industrial Development Zone, Shaanxi, Xi'an Patentee before: SHAANXI AEROSPACE POWER HIGH-TECH Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |