CN104154027A - Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability - Google Patents
Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability Download PDFInfo
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- CN104154027A CN104154027A CN201410388811.3A CN201410388811A CN104154027A CN 104154027 A CN104154027 A CN 104154027A CN 201410388811 A CN201410388811 A CN 201410388811A CN 104154027 A CN104154027 A CN 104154027A
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Abstract
A nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability comprises a pump cover, a pump cylinder, a flow guide body and a pump shaft. An impeller set A and an impeller set B are symmetrically arranged in the middle of the pump shaft in the pump cylinder, and mechanical sealing components are arranged on the outer sides of the two impeller sets respectively. The pump cover on the left side of the pump cylinder is connected with a bearing support A, the right side of the pump cylinder is connected with a bearing support B, the right side of the bearing support B is connected with a driving end bearing component, and the left side of the bearing support A is connected with a non-driving end bearing component. The driving end bearing component comprises a cylindrical roller bearing and a temperature measuring element. The non-driving end bearing component comprises a double-column angular contact ball bearing and a temperature measuring element. The nuclear power chemical vessel make-up pump is compact and reasonable in structure, the stressing point of the pump is located in the middle of the pump shaft, the axial force is automatically balanced, the operating reliability and stability of the pump are greatly improved, and the service life of the pump is greatly prolonged. The pump is suitable for multi-stage centrifugal pumps with ultra-small flow and ultra-high lift, and double-cylinder-structure (BB5) multi-stage centrifugal pumps with the high lift.
Description
Technical field:
The present invention relates to pump technology field, relate in particular to a kind of hydraulic part and be arranged symmetrically with the nuclear powerization appearance small pump that reliability is high.
Background technique:
It is extra small flow, ultrahigh pump lift multistage centrifugal pump that nuclear powerization is held small pump, it is one of capital equipment of chemical in nuclear power plant's auxiliary plant and volume system, its major function is to provide moisturizing to reactor coolant loop, or changes hydrochemical characteristics and the water loading amount of (maintaining) reactor coolant.The design pressure of pump is 21.4MPa, and design discharge is 34.1m
3/ h, rated lift is 1800m, and the axial force calculating has 17000kgf, and existing structure design adopts Balance disc and thrust-bearing balancing axial thrust.
Existing nuclear powerization is held small pump and is had following three shortcomings:
One, existing structure impeller is by equidirectional layout, use Balance disc balancing axial thrust, the maximum axial force force bearing point of pump shaft concentrates on Balance disc place, and the diameter of axle of pump is less herein, and because structure needs, pump shaft also has draw-in groove herein in order to positioning balance dish, be that stress is concentrated place relatively, axial force concentrates on this, is easy to cause pump shaft stress cracking.
Two, existing structure has high requirements to the axial clearance between Balance disc and Balance disc cover, generally must be controlled between 0.08～0.15mm, and the too little meeting in gap causes Balance disc and the interlock of Balance disc cover end face, until there is serious accident; Gap can reduce the balanced capacity of Balance disc too greatly, and the load of thrust-bearing is significantly increased.And the control in this gap be take " silk " as unit, in practical operation, be difficult to accomplish accurately.And along with the pump increase of running time, the gap between Balance disc and Balance disc cover can increase along with washing away of high-pressure water flow, and bearing is because long time running also rolls off the production line in the life-span at that time, and both stacks can be accelerated bearing failure.
Three, existing structure is subject to the impact of balance disc gap, and the load that bearing bears is difficult to definite, or very large, or very little, and these two kinds of stresses are all disadvantageous to bearing.
Summary of the invention:
Technical problem to be solved by this invention is to provide a kind of hydraulic part and is arranged symmetrically with the high nuclear powerization of reliability and holds small pump, its force bearing point in the middle of pump shaft, axial force energy autobalance, operational reliability, stability and the working life that can greatly improve pump.
Technological scheme to be solved by this invention is: a kind of hydraulic part is arranged symmetrically with the nuclear powerization that reliability is high and holds small pump, comprise pump cover, pump barrel body, mechanical seal parts, deflector, pump shaft, balance set, it is characterized in that: in described pump barrel body, pump shaft middle part is symmetrically arranged with A group impeller and B group impeller, and two groups of impeller outsides are provided with mechanical seal parts; On the pump cover of the pump barrel body left side, be connected by screw bearing bracket A, the pump barrel body right side has been connected by screw bearing bracket B, and the bearing bracket B right side is connected with drive end bearing parts, and the bearing bracket A left side is connected with non-driven-end bearing parts; Described drive end bearing parts comprise the roller bearing being arranged on pump shaft and are arranged on the temperature measuring element on bearing support; Described non-driven-end bearing parts comprise the double-row angular contact bal bearing being arranged on pump shaft and are arranged on the temperature measuring element on bearing support; In described non-driven-end bearing parts step bearing support A, be provided with small-sized fans; Between described mechanical seal parts and bearing part, on pump shaft, be provided with throwing water ring.
A group impeller quantity of the present invention is 7, and suction port is turned right.
B group impeller quantity of the present invention is 6, and suction port is turned left.
Impeller of the present invention adopts closed type structure, on impeller port ring and wheel hub cylindrical, is provided with spiral chute.
Bearing bracket A of the present invention top is provided with radiating groove, and bottom is provided with draws small opening.
External week of pump barrel of the present invention is set to polygonal.
On pump barrel body of the present invention and pump cover 4, be connected with balance tube 7.
The external all suction sides of pump barrel of the present invention are connected with and suck flange 11, and the end that spues is connected with the flange 6 that spues.
Deflector of the present invention adopts symmetric double flow passage structure.
Bearing of the present invention adopts thin oil lubricant.
Compact structure of the present invention rationally, its force bearing point in the middle of pump shaft, axial force has obtained autobalance, has greatly improved operational reliability, stability and the working life of pump.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram that the present invention carries out axial force testing;
In figure 1, non-driven-end bearing parts, 1-1, temperature measuring element, 1-2, double-row angular contact bal bearing, 1-3, nut A, 2, throw water ring, 3, bearing bracket A, 4, pump cover, 5, wound gasket, 6, the flange that spues, 7, balance tube, 8, deflector, 9, pump barrel body, 10, A group impeller, 11, suck flange, 12, mechanical seal parts, 13, drive end bearing parts, 13-1, roller bearing, 13-2, nut B, 14, pump shaft, 15, bearing bracket B, 16, B organizes impeller, 17, balance set.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated:
A kind of hydraulic part is arranged symmetrically with the nuclear powerization that reliability is high and holds small pump, comprise pump cover 4, pump barrel body 9, mechanical seal parts 12, deflector 8, pump shaft 14, balance set 17, it is characterized in that: the interior pump shaft of described pump barrel body 9 14 middle parts are symmetrically arranged with A group impeller 10 and 16, two groups of impeller outsides of B group impeller are provided with mechanical seal parts 12; On pump barrel body 9 left side pump covers 4, be connected by screw bearing bracket A3, pump barrel body 9 right sides have been connected by screw bearing bracket B15, and the bearing bracket B15 right side is connected with drive end bearing parts 13, and the bearing bracket A3 left side is connected with non-driven-end bearing parts 1; Described drive end bearing parts 13 comprise the roller bearing 13-1 being arranged on pump shaft and are arranged on the temperature measuring element 1-1 on bearing support; Described non-driven-end bearing parts 1 comprise the double-row angular contact bal bearing 1-2 being arranged on pump shaft and are arranged on the temperature measuring element 1-1 on bearing support; In described non-driven-end bearing parts 1 step bearing support A3, be provided with small-sized fans; Between described mechanical seal parts 12 and bearing part, on pump shaft, be provided with and throw water ring 2.Described A group impeller 10 quantity are 7, and suction port is turned right.Described B group impeller 16 quantity are 6, and suction port is turned left.Described impeller adopts closed type structure, on impeller port ring and wheel hub cylindrical, is provided with spiral chute.Described bearing bracket A3 top is provided with radiating groove, and bottom is provided with draws small opening.Described pump barrel body 9 peripheries are set to polygonal.On described pump barrel body 9 and pump cover 4, be connected with balance tube 7.Described pump barrel body 9 periphery suction sides are connected with and suck flange 11, and the end that spues is connected with the flange 6 that spues.Described deflector 8 adopts symmetric double flow passage structure.Described bearing adopts thin oil lubricant.
During concrete enforcement, 1), 13 grades of impellers adopt and be arranged symmetrically with the present invention has following characteristics:, more than 94% axial force self-balancing, residual axial force is born by balance set and thrust-bearing, force bearing point is in the middle of pump shaft, the diameter of axle in the middle of pump shaft is large, and without any stress concentration point, has greatly improved operational reliability, stability and the working life of pump.2), balance set is tubular construction, without any requirement to axial clearance, be controlled at ± 0.5mm of axial dipole field, even balance set outer round surface has wearing and tearing after pump long-play, can not produce much impacts to axial force yet.3), deflector adopts symmetric double flow passage structure, guarantees that pump is when any duty parameter operation, it imposes on the radial force vector balancing of rotor.4), each impeller port ring and wheel hub cylindrical and balance set place adopt spiral seal, improved the volumetric efficiency of pump, and spiral chute has containment to solid particle, can reduce the wearing and tearing of pump easily damaged parts, improves working life; Shaft end seal adopts unit loading type single end face balanced mechanical seal.5), be provided with throwing water ring between mechanical seal parts and bearing support, bearing bracket bottom is drawn and in small opening, is provided with leak-off connection; When mechanical seal occurs to leak, can be along pump shaft to bearing bore internal leakage, leakage fluid can be discharged from leak-off connection.The axial force that impeller of the present invention produces is pointed to the inlet side of impeller, the axial force that average each impeller produces is about 1300kg, the present invention is totally 13 grades of impellers, adopt standard to be arranged symmetrically with structure, 7 grades of one end suction eye of axle is turned right, and 6 grades of suction eyes of the other end are turned left, the most of autobalance of axial force that two ends impeller produces, remaining fraction axial force produces stable pulling force to axle, by anti-drive end double-row angular contact bal bearing, is born, and the load that bearing bears is reduced greatly.The axial force that the present invention bears bearing has been carried out verification experimental verification, after pump startup, push-pull effort sensor in real time by axial force data transmission to computer, by the flow forming after axial force testing---axial force curve is as Fig. 2, pump 10 ~ 30m
3the axial force that between/h flow, bearing bears is constant in 600kgf left and right, and the operational reliability of bearing is guaranteed.It is as follows that the present invention records bearing temperature by temperature measuring element after stable operation in 6 hours: drive end bearing temperature is 56.9 ° of C, non-driven-end bearing temperature is 61.7 ° of C, when ambient temperature is 27 ° of C, after non-driven-end bearing operation moves 6 hours, temperature is no more than 62 ° of C, bearing temperature rise is 35 ° of C, meets API610 standard-required.Bearing part has carried out bearing life calculating, and bearing life is greater than 100000 hours.The present invention is through 72 hours continuous operation tests and endurance test in 200 hours (during carry out 50 start and stop), in process of the test, pump bearing maximum temperature is no more than 76 ℃, pump assembly maximum velocity is better than vibration measurement and the evaluating method > > A level of JB/T8097 < < pump, and the operational reliability of pump assembly has obtained verification experimental verification.
Claims (10)
1. a hydraulic part is arranged symmetrically with the nuclear powerization appearance small pump that reliability is high, comprise pump cover (4), pump barrel body (9), mechanical seal parts (12), deflector (8), pump shaft (14), balance set (17), it is characterized in that: the described interior pump shaft of pump barrel body (9) (14) middle part is symmetrically arranged with A group impeller (10) and B group impeller (16), and two groups of impeller outsides are provided with mechanical seal parts (12); On pump barrel body (9) left side pump cover (4), be connected by screw bearing bracket A(3), pump barrel body (9) right side has been connected by screw bearing bracket B(15), bearing bracket B(15) right side is connected with drive end bearing parts (13), bearing bracket A(3) left side is connected with non-driven-end bearing parts (1); Described drive end bearing parts (13) comprise the roller bearing (13-1) being arranged on pump shaft and are arranged on the temperature measuring element (1-1) on bearing support; Described non-driven-end bearing parts (1) comprise the double-row angular contact bal bearing (1-2) being arranged on pump shaft and are arranged on the temperature measuring element (1-1) on bearing support; Described non-driven-end bearing parts (1) step bearing support A(3) in, be provided with small-sized fans; Between described mechanical seal parts (12) and bearing part, on pump shaft, be provided with and throw water ring (2).
2. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described A group impeller (10) quantity is 7, and suction port is turned right.
3. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described B group impeller (16) quantity is 6, and suction port is turned left.
4. according to a kind of hydraulic part described in claim 1 or 2 or 3, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described impeller adopts closed type structure, on impeller port ring and wheel hub cylindrical, is provided with spiral chute.
5. according to a kind of hydraulic part described in claim 1 or 5, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described bearing bracket A(3) top is provided with radiating groove, bottom is provided with draws small opening.
6. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described pump barrel body (9) periphery is set to polygonal.
7. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: on described pump barrel body (9) and pump cover (4), be connected with balance tube (7).
8. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described pump barrel body (9) periphery suction side is connected with and sucks flange (11), the end that spues is connected with the flange that spues (6).
9. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described deflector (8) adopts symmetric double flow passage structure.
10. according to a kind of hydraulic part described in claim 1, be arranged symmetrically with the nuclear powerization that reliability is high and hold small pump, it is characterized in that: described bearing adopts thin oil lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388811.3A CN104154027A (en) | 2014-08-08 | 2014-08-08 | Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388811.3A CN104154027A (en) | 2014-08-08 | 2014-08-08 | Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability |
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| Publication Number | Publication Date |
|---|---|
| CN104154027A true CN104154027A (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410388811.3A Pending CN104154027A (en) | 2014-08-08 | 2014-08-08 | Nuclear power chemical vessel make-up pump with high hydraulic component symmetric arrangement reliability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156363A (en) * | 2015-09-30 | 2015-12-16 | 无锡惠山泵业有限公司 | Bidirectional cooling water pump |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
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| JPH0886296A (en) * | 1994-09-19 | 1996-04-02 | Hitachi Ltd | Pump |
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| CN203214405U (en) * | 2013-04-24 | 2013-09-25 | 嘉利特荏原泵业有限公司 | Impeller wear ring of petroleum chemical process pump |
| CN203214340U (en) * | 2013-04-24 | 2013-09-25 | 嘉利特荏原泵业有限公司 | Double-shell symmetric radially-split multistage centrifugal pump |
| CN203230633U (en) * | 2013-04-18 | 2013-10-09 | 江苏双达工程技术研究中心有限公司 | Forward and reverse water flow diverter for self-balancing multistage centrifugal pump |
| CN203420895U (en) * | 2013-08-07 | 2014-02-05 | 上海凯泉泵业（集团）有限公司 | Multistage centrifugal make-up pump for nuclear power plant chemical and volume control system |
| CN204041512U (en) * | 2014-08-08 | 2014-12-24 | 江苏海狮泵业制造有限公司 | Hydraulic part is arranged symmetrically with the high nuclear powerization of reliability and holds small pump |
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2014
- 2014-08-08 CN CN201410388811.3A patent/CN104154027A/en active Pending
Patent Citations (11)
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| JPH0886296A (en) * | 1994-09-19 | 1996-04-02 | Hitachi Ltd | Pump |
| CN2630537Y (en) * | 2003-06-18 | 2004-08-04 | 中国石油天然气集团公司 | Balance drum axial fixing device for hydrogenation high-pressure pump |
| CN201582186U (en) * | 2009-11-20 | 2010-09-15 | 上海电力修造总厂有限公司 | Labyrinth lantern ring of water-feeding pump in power station |
| CN201739221U (en) * | 2010-01-13 | 2011-02-09 | 镇江正汉泵业有限公司 | Rotary-shell pump adopting rectangular spiral labyrinth dynamic sealing on impeller hub |
| CN201751587U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | Sealing device for centrifugal pump impeller wear ring |
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| CN203230633U (en) * | 2013-04-18 | 2013-10-09 | 江苏双达工程技术研究中心有限公司 | Forward and reverse water flow diverter for self-balancing multistage centrifugal pump |
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| CN203214340U (en) * | 2013-04-24 | 2013-09-25 | 嘉利特荏原泵业有限公司 | Double-shell symmetric radially-split multistage centrifugal pump |
| CN203420895U (en) * | 2013-08-07 | 2014-02-05 | 上海凯泉泵业（集团）有限公司 | Multistage centrifugal make-up pump for nuclear power plant chemical and volume control system |
| CN204041512U (en) * | 2014-08-08 | 2014-12-24 | 江苏海狮泵业制造有限公司 | Hydraulic part is arranged symmetrically with the high nuclear powerization of reliability and holds small pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156363A (en) * | 2015-09-30 | 2015-12-16 | 无锡惠山泵业有限公司 | Bidirectional cooling water pump |
| CN107542670A (en) * | 2017-09-27 | 2018-01-05 | 上海阿波罗机械股份有限公司 | Small pump and small pump pump group |
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Application publication date: 20141119 |