CN102606525A - Balance structure of rotor for starting water feeding pump - Google Patents
Balance structure of rotor for starting water feeding pump Download PDFInfo
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- CN102606525A CN102606525A CN2012100834042A CN201210083404A CN102606525A CN 102606525 A CN102606525 A CN 102606525A CN 2012100834042 A CN2012100834042 A CN 2012100834042A CN 201210083404 A CN201210083404 A CN 201210083404A CN 102606525 A CN102606525 A CN 102606525A
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Abstract
The invention discloses a balance structure of a rotor for starting a water feeding pump, which comprises a pump shaft, impellers sleeved on the pump shaft, a middle seal shaft sleeve, a rear seal shaft sleeve and a shaft sleeve nut. The impellers comprise nine stages, the nine stages of impellers comprise a first-stage impeller, a second-stage impeller, a third-stage impeller, a fourth-stage impeller and a fifth-stage impeller which are sequentially arranged from front to back in a low pressure area, and further comprises a sixth-stage impeller, a seven-stage impeller, an eighth-stage impeller and a ninth-stage impeller which are sequentially arranged from back to front in a high pressure area, inlets of the five stages of impellers of the low pressure area point to the driving end of a charging pump, and the four stages of impellers of the high pressure area are symmetrically arranged with the rear four stages of impellers in the low pressure area in back-to-back mode. Rear hubs of the nine stages of impellers have the same outer diameter, the diameter of an inlet of the first-stage impeller of the low pressure area is larger than that of inlets of the other eight stages of impellers, and the shapes and sizes of the other eight stages of impellers are the same. The middle seal shaft sleeve is sleeved between the fifth-stage impeller and the ninth-stage impeller, the rear seal shaft sleeve is arranged at the rear end of the sixth-stage impeller, the outer diameter of the rear seal shaft sleeve is larger than that of the rear hubs of the nine stages of impellers, a nut of the shaft sleeve is fixed at the rear end of the rear seal shaft sleeve.
Description
Technical field
The present invention relates to a kind of used in nuclear power station and start feed water pump, be specifically related to a kind of balance structure that is used to start the rotor of feed water pump.
Background technique
Used in nuclear power station starts feed water pump and is used for during reactor start-up and normal shutdown, supplying water to steam generator, need not employ the water source of auxiliary feedwater system, and gives that the secondary circuit flushing facilitates when starting.Existing startup feed water pump be level to multistage pump, therefore the and axial force that existing multistage pump adopts Balance disc or balancing drum to come the balancing rotor parts more makes the complex structure of rotor part.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of existing technology, a kind of balance structure that is used to start the rotor of feed water pump is provided, it can automatic balancing rotor parts axial force in the running, and then guarantees rotational efficienty.
The technological scheme that realizes above-mentioned purpose is: a kind of balance structure that is used to start the rotor of feed water pump, and comprise pump shaft, be sleeved on impeller, intermediate seal axle sleeve, back sealing axle sleeve and sleeve nut on the pump shaft, wherein,
Said impeller is made up of nine grades of impellers; These nine grades of impellers comprise low pressure area from A-P arrange successively first to level V impeller and zone of high pressure from the back to preceding the 6th to the 9th grade of impeller of arranging successively; The drive end of said startup feed water pump is pointed in the import of the Pyatyi impeller of low pressure area, and the back level Four impeller of the level Four impeller of zone of high pressure and low pressure area is symmetric arrangement back-to-back; The external diameter of the rear-wheel hub of said nine grades of impellers is identical; The inlet diameter of the first stage impeller of low pressure area is greater than the inlet diameter of other eight grades of impellers, and the profile of other eight grades of impellers and measure-alike;
Said intermediate seal axle sleeve is located between said level V impeller and the 9th grade of impeller;
Said back sealing axle sleeve is located at the rear end of said the 6th grade of impeller, and the external diameter of this back sealing axle sleeve is greater than the external diameter of the rear-wheel hub of said nine grades of impellers;
Said sleeve nut is fixed on the rear end of said back sealing axle sleeve.
The above-mentioned balance structure that is used to start the rotor of feed water pump, wherein, said nine grades of impellers, intermediate seal axle sleeve and back sealing axle sleeve are fixed on the said pump shaft through driving key respectively.
The above-mentioned balance structure that is used to start the rotor of feed water pump wherein, is respectively equipped with O-ring seals between said intermediate seal axle sleeve and the said pump shaft and between said sealing axle sleeve afterwards and the said pump shaft.
The above-mentioned balance structure that is used to start the rotor of feed water pump, wherein, said nine grades of impellers are single suction, double shrouded wheel.
The technological scheme of the balance structure of the rotor that is used to start feed water pump of the present invention is decided to be nine grades with impeller, is provided with the Pyatyi impeller at low pressure area; The zone of high pressure is provided with the level Four impeller; The entrance point size of the first stage impeller of low pressure area is bigger than the entrance point size of back level Four impeller, and then the external diameter of sealing axle sleeve is greater than the external diameter of the rear-wheel hub of nine grades of impellers, and the axial force of low pressure area first stage impeller is come balance by the back sealing axle sleeve; The profile of the back level Four impeller of low pressure area and the level Four impeller of zone of high pressure and measure-alike; And symmetric arrangement back-to-back, so the axial force that their produce with regard to autobalance, does not therefore need Balance disc or balancing drum just can realize the rotor part balance of axial force; And then guarantee rotational efficienty, effectively prolong the working life that starts feed water pump and make pump structure compact more.
Description of drawings
Fig. 1 is the structural representation of the balance structure of the rotor that is used to start feed water pump of the present invention.
Embodiment
In order to understand technological scheme of the present invention better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1, a kind of balance structure that is used to start the rotor of feed water pump of the present invention comprises pump shaft 1, is sleeved on impeller, intermediate seal axle sleeve 3, back sealing axle sleeve 4 and sleeve nut 5 on the pump shaft 1, wherein:
Impeller is made up of nine grades of impellers 21～29 and is fixed on the pump shaft 1 through driving key 10 respectively; These nine grades of impellers are single suction, double shrouded wheel; These nine grades of impellers comprise low pressure area from A-P arrange successively first to level V impeller 21～25 and zone of high pressure from the back to preceding the 6th to the 9th grade of impeller of arranging successively 26～29; The drive end that starts feed water pump is pointed in the import of the Pyatyi impeller 21～25 of low pressure area, and the level Four impeller 26～29 of zone of high pressure and the back level Four impeller 22～25 of low pressure area be symmetric arrangement back-to-back; The external diameter L2 of the rear-wheel hub of nine grades of impellers 21～29 is identical; The inlet diameter L1 of the first stage impeller 21 of low pressure area is greater than the inlet diameter of other eight grades of impellers 22～29, and the profile of other eight grades of impellers 22～29 and measure-alike;
Intermediate seal axle sleeve 3 is located between level V impeller 25 and the 9th grade of impeller 29 and through driving key and is fixed on the pump shaft 1; Be provided with O-ring seals 31 between intermediate seal axle sleeve 3 and the pump shaft 1;
Back sealing axle sleeve 4 is located at the rear end of the 6th grade of impeller 26 and is fixed on the pump shaft 1 through driving key 10, is provided with O-ring seals 41 between this back sealing axle sleeve 4 and the pump shaft 1, and the external diameter H of this back sealing axle sleeve 4 is greater than the external diameter L2 of the rear-wheel hub of nine grades of impellers 21～29;
The equilibrium principle of the balance structure of the rotor that is used to start feed water pump of the present invention is:
Because the external diameter of the preoral loop of every grade of impeller is different with the external diameter of rear-wheel hub, impeller will produce axial force, and direction is pointed to impeller inlet.And the back level Four 22～25 of low pressure area is identical with level Four impeller 26～29 boundary dimension of zone of high pressure, and symmetric arrangement back-to-back, so the axial force that their produce is with regard to autobalance.In addition because the axial force direction that first stage impeller 21 produces is pointed to drive end; Then the external diameter of sealing axle sleeve 4 is greater than the external diameter of the rear-wheel hub of all impellers; And back sealing axle sleeve 4 is the lift of Pyatyi impeller 21～25 generations of low pressure area with the pressure that the 6th grade of impeller 26 is connected side; Back sealing axle sleeve 4 is communicated with the import of pump by balancing pipeline with the pressure of sleeve nut 5 sides, and this pressure is inlet pressure, and sealing axle sleeve 4 will produce axial force after the institute; Direction is pointed to anti-drive end, and the axial force that external diameter produced of sealing axle sleeve 4 is come the axial force that balance first stage impeller 21 produces after therefore utilizing.
The balance structure that is used to start the rotor of feed water pump of the present invention does not need Balance disc or balancing drum just can realize the rotor part balance of axial force, and then guarantees rotational efficienty, effectively prolongs the working life of startup feed water pump.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (4)
1. a balance structure that is used to start the rotor of feed water pump comprises pump shaft, is sleeved on impeller, intermediate seal axle sleeve, back sealing axle sleeve and sleeve nut on the pump shaft, it is characterized in that,
Said impeller is made up of nine grades of impellers; These nine grades of impellers comprise low pressure area from A-P arrange successively first to level V impeller and zone of high pressure from the back to preceding the 6th to the 9th grade of impeller of arranging successively; The drive end of said startup feed water pump is pointed in the import of the Pyatyi impeller of low pressure area, and the back level Four impeller of the level Four impeller of zone of high pressure and low pressure area is symmetric arrangement back-to-back; The external diameter of the rear-wheel hub of said nine grades of impellers is identical; The inlet diameter of the first stage impeller of low pressure area is greater than the inlet diameter of other eight grades of impellers, and the profile of other eight grades of impellers and measure-alike;
Said intermediate seal axle sleeve is located between said level V impeller and the 9th grade of impeller;
Said back sealing axle sleeve is located at the rear end of said the 6th grade of impeller, and the external diameter of this back sealing axle sleeve is greater than the external diameter of the rear-wheel hub of said nine grades of impellers;
Said sleeve nut is fixed on the rear end of said back sealing axle sleeve.
2. the balance structure that is used to start the rotor of feed water pump according to claim 1 is characterized in that said nine grades of impellers, intermediate seal axle sleeve and back sealing axle sleeve are fixed on the said pump shaft through driving key respectively.
3. the balance structure that is used to start the rotor of feed water pump according to claim 1 and 2 is characterized in that, is respectively equipped with O-ring seals between said intermediate seal axle sleeve and the said pump shaft and between said sealing axle sleeve afterwards and the said pump shaft.
4. the balance structure that is used to start the rotor of feed water pump according to claim 1 and 2 is characterized in that said nine grades of impellers are single suction, double shrouded wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100834042A CN102606525A (en) | 2012-03-27 | 2012-03-27 | Balance structure of rotor for starting water feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100834042A CN102606525A (en) | 2012-03-27 | 2012-03-27 | Balance structure of rotor for starting water feeding pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102606525A true CN102606525A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100834042A Pending CN102606525A (en) | 2012-03-27 | 2012-03-27 | Balance structure of rotor for starting water feeding pump |
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| Country | Link |
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| CN (1) | CN102606525A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150428A (en) * | 2017-12-22 | 2018-06-12 | 张秋达 | A kind of agricultural irrigation is used with the water pump for adjusting hydraulic pressure size |
| CN109989922A (en) * | 2019-04-28 | 2019-07-09 | 浙江威龙泵业有限公司 | Combined type self-priming centrifugal pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718406A (en) * | 1971-03-22 | 1973-02-27 | Borg Warner | Centrifugal pump with integral seal pressure balance |
| US3861825A (en) * | 1970-12-21 | 1975-01-21 | Borg Warner | Multistage pump and manufacturing method |
| CN2591279Y (en) * | 2002-12-31 | 2003-12-10 | 张宝华 | Centripetal automatic balancing water pump |
| CN2622432Y (en) * | 2003-06-06 | 2004-06-30 | 李再成 | Self-balance multi-stage segmental centrifugal pump |
| CN201321988Y (en) * | 2008-12-02 | 2009-10-07 | 上海凯泉泵业（集团）有限公司 | Self-balance multistage centrifugal pump |
| CN201433903Y (en) * | 2009-04-30 | 2010-03-31 | 朱善根 | Multistage centrifugal pump for chemical process |
| CN101922451A (en) * | 2009-06-09 | 2010-12-22 | 江苏双达工程技术研究中心有限公司 | Multistage centrifugal pump |
| CN202597226U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Balancing structure for starting feed pump rotor |
-
2012
- 2012-03-27 CN CN2012100834042A patent/CN102606525A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861825A (en) * | 1970-12-21 | 1975-01-21 | Borg Warner | Multistage pump and manufacturing method |
| US3718406A (en) * | 1971-03-22 | 1973-02-27 | Borg Warner | Centrifugal pump with integral seal pressure balance |
| CN2591279Y (en) * | 2002-12-31 | 2003-12-10 | 张宝华 | Centripetal automatic balancing water pump |
| CN2622432Y (en) * | 2003-06-06 | 2004-06-30 | 李再成 | Self-balance multi-stage segmental centrifugal pump |
| CN201321988Y (en) * | 2008-12-02 | 2009-10-07 | 上海凯泉泵业（集团）有限公司 | Self-balance multistage centrifugal pump |
| CN201433903Y (en) * | 2009-04-30 | 2010-03-31 | 朱善根 | Multistage centrifugal pump for chemical process |
| CN101922451A (en) * | 2009-06-09 | 2010-12-22 | 江苏双达工程技术研究中心有限公司 | Multistage centrifugal pump |
| CN202597226U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Balancing structure for starting feed pump rotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150428A (en) * | 2017-12-22 | 2018-06-12 | 张秋达 | A kind of agricultural irrigation is used with the water pump for adjusting hydraulic pressure size |
| CN109989922A (en) * | 2019-04-28 | 2019-07-09 | 浙江威龙泵业有限公司 | Combined type self-priming centrifugal pump |
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Application publication date: 20120725 |