CN203730332U - Vertical multi-stage centrifugal pump - Google Patents
Vertical multi-stage centrifugal pump Download PDFInfo
- Publication number
- CN203730332U CN203730332U CN201320840588.2U CN201320840588U CN203730332U CN 203730332 U CN203730332 U CN 203730332U CN 201320840588 U CN201320840588 U CN 201320840588U CN 203730332 U CN203730332 U CN 203730332U
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- China
- Prior art keywords
- pump
- pump shaft
- stage centrifugal
- vertical multi
- pump case
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Abstract
The utility model discloses a vertical multi-stage centrifugal pump and belongs to the pump field. The vertical multi-stage centrifugal pump comprises a drive motor, a pump shaft, guide vanes, impellers, a pump case and a mechanical seal. The drive motor is connected with the pump shaft through a coupler so as to drive the pump shaft to rotate. The pump shaft is arranged in the pump case in a penetrating mode. A plurality of the guide vanes and a plurality of the impellers are arranged on the pump shaft in a sleeved mode. The guide vanes and the impellers are connected in an alternating mode. The penetration-out portion of the upper end of the pump shaft of the pump case is sealed through the mechanical seal. The lower end of the pump shaft is connected with the bottom of the pump case and sleeved with a bearing. The lower end of the pump case is provided with a water inlet and outlet section. The vertical multi-stage centrifugal pump can balance the axial force well, improve the efficiency, increase the wet critical rotation speed, and improve the stability of rotor operation.
Description
Technical field
The utility model relates to pump field, particularly relates to a kind of vertical multi-stage centrifugal pump.
Background technique
Vertical multi-stage centrifugal pump is a kind of application area general hydraulic machinery very widely, and along with the develop rapidly of Chinese science and technology, the demand of vertical multistage centrifugal pump was also in continuous increase in recent years.Common vertical multi-stage centrifugal pump, under the acting in conjunction of gravity and liquid water thrust, the rotor being comprised of the rotating part of axle, impeller, mechanical seal, coupling etc. is received a downward axial force.Conventional Equilibrator is at Balance disc, balancing drum and single seal ring.Balance disc and balancing drum balancing axial thrust, also need balance tube to coordinate, and device is complicated, and reliability is low, and maintenance rate is high, will improve the stationarity of rotor simultaneously, will increase the diameter of axle, and result has reduced the area of passage of impeller eye, has reduced the cavitation performance of pump.
Model utility content
For above-mentioned problem, the utility model provides a kind of vertical multi-stage centrifugal pump, the axial force of balancing rotor well, and the stationarity of rotor is high, improves pump efficiency.
Technical solution adopted in the utility model is: a kind of vertical multi-stage centrifugal pump, comprises drive motor, pump shaft, stator, impeller, pump case and mechanical seal; Drive motor is connected to drive pump shaft to rotate with pump shaft by coupling; Pump shaft is arranged in pump case; On several stators and the sheathed pump shaft of several impellers, stator and impeller interval join; The pump shaft upper end of pump case passes position and seals by mechanical seal; Pump shaft lower end is connected with pump case bottom and there is bearing socket pump shaft lower end; Pump case lower end is provided with water inlet-outlet segment.
In technique scheme, being positioned at pump case stator is topmost last stator, and last stator upper end is also provided with out water ring, and water outlet ring set is located on pump shaft and is positioned at pump case.
In technique scheme, mechanical seal upper end is also covered with machine sealed cover, and machine sealed cover compresses mechanical seal, and machine sealed cover is strengthened the sealing of mechanical seal.
In technique scheme, then axle sleeve is also overlapped in pump shaft lower end, and axle sleeve is supporting impeller and the stator of upper end, and impeller and stator compactness are joined.
In technique scheme, pump shaft lower end is fixed by locking nut and pump case lower end; The pump shaft lower end of pump case passes position and is provided with back-up ring, is fixed with pressing plate on back-up ring, to seal the pump shaft lower end of pump case, passes position.
In technique scheme, this kind of vertical multi-stage centrifugal pump also comprises motor cabinet and pull bar, and motor cabinet locks in pump case upper end by pull bar, and drive motor is fixed on motor cabinet; Motor cabinet is also provided with safety cover, and safety cover is located at drive motor and pump shaft link position, to protect coupling.
In technique scheme, the inlet segment of water inlet-outlet segment and water exit end are all provided with outlet valve; The inlet segment of water inlet-outlet segment is provided with clean water outlet, to remove ponding.
In technique scheme, this kind of vertical multi-stage centrifugal pump also comprises pressure gauge and vacuum gauge, and pressure gauge and vacuum gauge are all located on pump case, to monitor hydraulic pressure in pump.
The beneficial effects of the utility model are: a kind of vertical multi-stage centrifugal pump of above-mentioned structure, and rational in infrastructure, balancing axial thrust has reduced the volumetric loss between stator and blade wheel structure simultaneously well, thereby has improved the efficiency of pump; On several stators and the sheathed pump shaft of several impellers, form multistage supplemental support, improved wet criticality rotating speed, strengthened the stationarity of rotor operation.
Accompanying drawing explanation
Fig. 1 is overall structure cross-sectional view of the present utility model;
Fig. 2 is back-up ring of the present utility model and pressing plate assembling schematic diagram.
In figure, 1, drive motor; 2, pump shaft; 3, stator; 4, impeller; 5, pump case; 6, motor cabinet; 7, pull bar; 8, coupling; 9, mechanical seal; 10, safety cover; 11, go out water ring; 12, machine sealed cover; 13, bearing; 14, axle sleeve; 15, back-up ring; 16, pressing plate; 17, water inlet-outlet segment; 18, outlet valve; 19, clean water outlet; 20, pressure gauge; 21, vacuum gauge; .
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 and Fig. 2 have schematically shown a kind of vertical multi-stage centrifugal pump according to a kind of mode of execution of the present utility model.
This kind of vertical multi-stage centrifugal pump, comprises drive motor 1, pump shaft 2, stator 3, impeller 4, pump case 5, motor cabinet 6, pull bar 7, coupling 8 and mechanical seal 9.Drive motor 1 is three-phase and quadrupole motor; Pull bar 7 one end connect motor cabinet 6 lower end one sides, and pull bar 7 the other ends connect shell lower end, pump side one side, and motor cabinet 6 locks in pump case 5 upper ends by pull bar 7.Drive motor 1 is screwed in directly over motor cabinet 6.The output terminal of drive motor 1 connects one end of coupling 8, and coupling 8 the other ends connect pump shaft 2, and drive motor 1 drive motor 1 is connected to drive pump shaft 2 to rotate by coupling 8 and pump shaft 2; Motor cabinet 6 is also provided with safety cover 10, and safety cover 10 is located at drive motor 1 and pump shaft 2 link positions, and safety cover 10 surrounds coupling 8 with protection coupling 8.Pump shaft 2 is arranged in pump case 5, and pump shaft 2 is positioned on the home position of pump case 5.On 3 stators 3 and 3 sheathed pump shafts 2 of impeller 4, stator 3 and impeller 4 intervals join; Being positioned at pump case 5 stator 3 is topmost last stator 3, and last stator 3 upper ends are also provided with out water ring 11, go out water ring 11 be set on pump shaft 2 and be positioned at pump case 5; Then axle sleeve 14 is also overlapped in pump shaft 2 lower ends, and axle sleeve 14 is supporting impeller 4 and the stator 3 of upper end, and impeller 4 and stator 3 compactnesses are joined.Pump shaft 2 upper ends of pump case 5 pass position and seal by mechanical seal 9, and mechanical seal 9 is being overlapped pump shaft 2 and is being positioned at the outer upper end of pump case 5, and pump shaft 2 upper ends that pump case 5 is close in mechanical seal 9 pass position to reach seal action; Mechanical seal 9 upper ends are also covered with machine sealed cover 12, and machine sealed cover 12 is screwed on motor cabinet 6, and machine sealed cover 12 compresses mechanical seal 9, and machine sealed cover 12 is strengthened the sealing of mechanical seal 9.Pump shaft 2 lower ends are connected with pump case 5 bottoms and there are bearing 13 sockets pump shaft 2 lower ends, and bearing 13 also overlaps then axle sleeve 14 lower ends simultaneously, and pump shaft 2 lower ends are fixed by locking nut and pump case 5 lower ends; Pump shaft 2 lower ends of pump case 5 pass position be provided with back-up ring 15, on back-up ring 15, be fixed with pressing plate 16, pressing plate 16 nested back-up ring 15, to seal pump shaft 2 lower ends of pump case 5, pass position; Pump case 5 lower ends are provided with water inlet-outlet segment 17, and the inlet segment of water inlet-outlet segment 17 is positioned at pump case 5 left sides, lower end, and the water exit end of water inlet-outlet segment 17 is positioned at pump case 5 right sides, lower end; The inlet segment of water inlet-outlet segment 17 and water exit end are all provided with inlet segment upper end and the water exit end upper end that 18, two outlet valves 18 of outlet valve lay respectively at water inlet-outlet segment 17, the impact of minimizing on this kind of vertical multi-stage centrifugal pump work when carrying out exhaust; The inlet segment of water inlet-outlet segment 17 is provided with clean water outlet 19, and clean water outlet 19 is specifically positioned at the inlet segment lower end of water inlet-outlet segment 17 to remove ponding, and clean water outlet 19 seals by cock.This kind of vertical multi-stage centrifugal pump also comprises pressure gauge 20 and vacuum gauge 21, pressure gauge 20 and vacuum gauge 21 are all located on pump case 5, pressure gauge 20 is positioned at the inlet segment upper end of water inlet-outlet segment 17, and vacuum gauge 21 is positioned at the water exit end upper end of water inlet-outlet segment 17, to monitor the interior hydraulic pressure of pump case 5.
This kind of vertical multi-stage centrifugal pump realize principle: drive motor 1 drives pump shaft 2, be filled in liquid in impeller 4 under the effect of centrifugal force, from impeller 4 centers along interlobate runner, get rid of to the surrounding of impeller 4, because liquid is subject to the effect of blade, pressure and speed are increased simultaneously, through the runner of stator 3, be drawn towards the impeller 4 of time one-level, like this, successively flow through all impellers 4 and stator 3, further make the pressure energy of liquid increase, after each impeller 4 is superposeed step by step, just obtain certain lift, thereby carry liquid.
Above embodiment is just explanation rather than restriction the utility model, and the equivalence of doing according to the method described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (8)
1. a vertical multi-stage centrifugal pump, is characterized in that, comprises drive motor, pump shaft, stator, impeller, pump case and mechanical seal; Drive motor is connected to drive pump shaft to rotate with pump shaft by coupling; Pump shaft is arranged in pump case; Described in several, described in stator and several on sheathed pump shaft of impeller, described stator and described impeller interval join; The pump shaft upper end of pump case passes position and seals by described mechanical seal; Pump shaft lower end is connected with pump case bottom, and there is bearing socket described pump shaft lower end; Pump case lower end is provided with water inlet-outlet segment.
2. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: being positioned at pump case stator is topmost last stator, and last stator upper end is also provided with out water ring, and water outlet ring set is located on pump shaft and is positioned at pump case.
3. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: mechanical seal upper end is also covered with machine sealed cover, and machine sealed cover compresses mechanical seal.
4. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: then axle sleeve is also overlapped in pump shaft lower end, and axle sleeve is supporting impeller and the stator of upper end, and impeller and stator compactness are joined.
5. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: pump shaft lower end is fixed by locking nut and pump case lower end; The pump shaft lower end of pump case passes position and is provided with back-up ring, is fixed with pressing plate on back-up ring, to seal the pump shaft lower end of pump case, passes position.
6. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: this kind of vertical multi-stage centrifugal pump also comprises motor cabinet and pull bar, and motor cabinet locks in pump case upper end by pull bar, and drive motor is fixed on motor cabinet; Motor cabinet is also provided with safety cover, and safety cover is located at drive motor and pump shaft link position, to protect coupling.
7. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: the inlet segment of water inlet-outlet segment and water exit end are all provided with outlet valve; The inlet segment of water inlet-outlet segment is provided with clean water outlet, to remove ponding.
8. a kind of vertical multi-stage centrifugal pump according to claim 1, is characterized in that: this kind of vertical multi-stage centrifugal pump also comprises pressure gauge and vacuum gauge, and pressure gauge and vacuum gauge are all located on pump case, to monitor hydraulic pressure in pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320840588.2U CN203730332U (en) | 2013-12-19 | 2013-12-19 | Vertical multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320840588.2U CN203730332U (en) | 2013-12-19 | 2013-12-19 | Vertical multi-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730332U true CN203730332U (en) | 2014-07-23 |
Family
ID=51200410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320840588.2U Expired - Fee Related CN203730332U (en) | 2013-12-19 | 2013-12-19 | Vertical multi-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730332U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329264A (en) * | 2014-09-28 | 2015-02-04 | 安徽舜禹水务实业有限公司 | Novel non self-priming vertical water pump |
| CN106194758A (en) * | 2016-08-31 | 2016-12-07 | 上海中韩杜科泵业制造有限公司 | A kind of vertical multi-stage centrifugal pump of universal connection support |
| CN107461339A (en) * | 2016-06-03 | 2017-12-12 | 苏州赟羽机电科技有限公司 | A kind of intelligent centrifugal multistage pump multiple centrifugal pump |
| CN110185625A (en) * | 2019-05-17 | 2019-08-30 | 陕西科技大学 | A kind of liquefied ammonia delivery pump |
-
2013
- 2013-12-19 CN CN201320840588.2U patent/CN203730332U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329264A (en) * | 2014-09-28 | 2015-02-04 | 安徽舜禹水务实业有限公司 | Novel non self-priming vertical water pump |
| CN107461339A (en) * | 2016-06-03 | 2017-12-12 | 苏州赟羽机电科技有限公司 | A kind of intelligent centrifugal multistage pump multiple centrifugal pump |
| CN106194758A (en) * | 2016-08-31 | 2016-12-07 | 上海中韩杜科泵业制造有限公司 | A kind of vertical multi-stage centrifugal pump of universal connection support |
| CN110185625A (en) * | 2019-05-17 | 2019-08-30 | 陕西科技大学 | A kind of liquefied ammonia delivery pump |
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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 |
Granted publication date: 20140723 Termination date: 20151219 |
|
| EXPY | Termination of patent right or utility model |