CN102889241A - Pump body for PCS (passive containment cooling system) recirculating pump - Google Patents
Pump body for PCS (passive containment cooling system) recirculating pump Download PDFInfo
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- CN102889241A CN102889241A CN2012100833232A CN201210083323A CN102889241A CN 102889241 A CN102889241 A CN 102889241A CN 2012100833232 A CN2012100833232 A CN 2012100833232A CN 201210083323 A CN201210083323 A CN 201210083323A CN 102889241 A CN102889241 A CN 102889241A
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- impeller
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- spiral case
- case chamber
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Abstract
The invention discloses a pump body for a PCS (passive containment cooling system) recirculating pump and belongs to the field of nuclear power equipment. The pump body comprises a water suction chamber, a volute chamber, a pump shaft, an impeller, a pump cover and a shaft sleeve, wherein one end of the water suction chamber is provided with a suction flange, the other end of the water suction chamber is axially connected with the volute chamber through a connection part, the impeller is arranged inside the volute chamber, and rear end of the impeller is sleeved at the tail end of the pump shaft; the front end of the impeller is in sleeving connection with the connection part; the shaft sleeve is sleeved on the pump shaft, the pump cover is sleeved on the outer wall of the shaft sleeve and axially closes the volute chamber; the volute chamber is a single volute-type volute chamber, a water outlet pipe is arranged on the outer wall of the volute chamber, and the tail end of the water outlet pipe is provided with a discharge flange; a water pumping chamber is formed among the inner wall of the volute chamber, the pump cover and the impeller.
Description
Technical field
The present invention relates to a kind of pump housing for the PCS recirculating pump in nuclear power equipment field.
Background technique
The PCS recirculating pump is to be used in a kind of recirculating pump that often uses in the pcs system of nuclear power station, pcs system is also referred to as and is Passive containment cooling system, the effect of this system is: after accident occurs containment is effectively cooled off, thereby guarantee containment not superpressure and rapid depressurization.The pcs system critical piece comprises: non-passive safety shell cooling water container (PCCWST), air deflection plate (air baffle), air inlet and air outlet slit, water distribution system.In addition, also have the auxiliary water storage tank (PCCAWST) of non-passive safety shell cooling and two PCS recirculating pumps, use at the scene recirculating pump that extra cooling water is provided from PCCAWST to pcs system, can also provide the reserve moisturizing for the antidetonation water tower of fire-fighting system.
The pump housing of described PCS recirculating pump comprises suction chamber and pumping chamber.Described suction chamber refers to the overcurrent part between the impeller inlet of the suction flange of described PCS recirculating pump and described PCS recirculating pump impeller.Because the flowing velocity of water in suction chamber is less, thereby reduced water water conservancy loss in suction chamber.Overcurrent part between pumping chamber refers to from the impeller outlet to the outlet(discharge) flange.In the described PCS recirculating pump, the function of described pumping chamber is to reduce the flow stream velocity of water in described pumping chamber, makes the kinetic energy of water convert pressure energy to.If adopt traditional double volute type pumping chamber, will cause the section area of described outer pipe end excessive, thereby cause water to increase severely at the flow velocity of outer pipe end section, the local resistance loss of water is large, thereby causes pump efficiency to reduce, even burns the adapted motor.
Summary of the invention
The objective of the invention is provides a kind of pump housing for the PCS recirculating pump in order to overcome the deficiencies in the prior art, and it is simple in structure, be easy to realize, but the efficient of Effective Raise PCS recirculating pump.
A kind of technological scheme that realizes above-mentioned purpose is: a kind of pump housing for the PCS recirculating pump comprises suction chamber, spiral case chamber, pump shaft, impeller, pump cover and axle sleeve; One end of described suction chamber arranges suction flange, and the other end of described suction chamber axially is connected with described spiral case chamber by joint, and described impeller places described spiral case indoor, and the rear front end sleeve of described impeller is connected to the end of described pump shaft; And the front end of described impeller and the socket of described joint; Described axle sleeve is socketed on the described pump shaft, and described pump cover is socketed on the outer wall of described axle sleeve, and described spiral case chamber is axially sealed;
Described spiral case chamber is single volute type spiral case chamber, sets out water pipe on the outer wall of described spiral case chamber, and the end of described outlet pipe arranges outlet(discharge) flange; Form pumping chamber between described spiral case, described pump cover and the described impeller.
Further, described suction chamber is the straight-tapered suction chamber, and the section area at the described suction flange place of described suction chamber is less than the section area at described joint place.
Further, between the rear end of described impeller and the described pump cover increasing back sealing ring is set, between the front end of described impeller and the described joint front seal ring is set, between described impeller and the described pump shaft impeller nut is set.
Further, described outlet pipe is arranged at the top of described spiral case chamber, and described outlet pipe is with vertical in the level ground.
Further, described impeller is enclosed impeller.
Further, the bottom of described spiral case chamber arranges the pump pin.
Adopted the technological scheme of a kind of pump housing for the PCS recirculating pump of the present invention, namely adopted suction chamber and be connected the technological scheme that volute type spiral case chamber axially connects by joint.Its technique effect is: reduce the section area of outlet(discharge) flange, reduce water at the flow velocity of described outer pipe end, reduce water at the terminal local resistance loss of described outer pipe, improve the efficient of PCS recirculating pump.
Description of drawings
Fig. 1 is the axial arrangement schematic representation of a kind of pump housing for the PCS recirculating pump of the present invention.
Embodiment
To see also Fig. 1, in order understanding technological scheme of the present invention better, below by embodiment particularly, and to be described in detail by reference to the accompanying drawings:
See also Fig. 1, a kind of pump housing for the PCS recirculating pump of the present invention comprises suction chamber 1, spiral case chamber 2, pump shaft 4, impeller 3, pump cover 22 and axle sleeve 5; One end of described suction chamber 1 arranges suction flange 1, and the other end of described suction chamber 1 axially is connected with described spiral case chamber 2 by joint 12; Described impeller 3 places in the described spiral case chamber 2, and the rear end of described impeller 3 is socketed on the end of described pump shaft 5; And the front end of described impeller 3 and 12 sockets of described joint; Described axle sleeve 5 is socketed on the described pump shaft 4, and described pump cover 22 is socketed on the outer wall of described axle sleeve 5, and described spiral case chamber 2 is axially sealed.
An important improvement of the present invention is: described spiral case chamber 2 is single volute type spiral case chambers, sets out water pipe 23 on the outer wall of described spiral case chamber 2, and the end of described outlet pipe 23 arranges outlet(discharge) flange 231; Form pumping chamber 25 between the inwall of described spiral case chamber 2, described pump cover 22 and the described impeller 3.Because described spiral case chamber 2 is single volute type spiral case chambers, therefore described pumping chamber 25 just belongs to single volute type pumping chamber.
Adopt the purpose of single volute type spiral case chamber to be: the section area that helps to reduce described outlet pipe 23 ends, reduce the bore of described outlet(discharge) flange 231, reduce water at the flow velocity of described outer pipe 23 tail ends, reduce water at the local resistance loss at terminal 11 places of described outer pipe, improve the efficient of PCS recirculating pump.
And described outlet pipe 23 is arranged at the top of described spiral case chamber 2, and described outlet pipe 23 is perpendicular to the level ground.Its purpose is: can reduce like this axial length of described PCS recirculating pump, make the axial length of described PCS recirculating pump satisfy the requirement of default.
Owing among the present invention, have stable rotating center in order to guarantee described impeller 3.Between the rear end of described impeller 3 and the described pump cover 22 increasing back sealing ring 33 is set, front seal ring 32 is set between the front end of described impeller 3 and the described joint 12, between described impeller 3 and the described pump shaft 4 impeller nut 34 is set.
An other important improvement is suction chamber 1 among the present invention, and described suction chamber 1 is the straight-tapered suction chamber, and the section area at described suction flange 11 places of described suction chamber 1 is less than the section area at described joint 12 places.
The purpose of design is like this: water described suction chamber 1 in from described suction flange 11 to described joint 12 mobile in, the flow velocity of water slows down gradually, therefore the hydraulic loss of water described suction chamber 1 in is little, and then guarantees that water is the impeller inlet 31 that is arranged at described impeller 3 front ends with uniform flow velocity inflow.Like this can Effective Raise the PCS recirculating pump efficient and anti-cavitation performance.
In addition, in order to improve the efficient of PCS recirculating pump, among the present invention, what described impeller 3 was selected is enclosed impeller, and the impeller outlet of described impeller 3 is positioned on the excircle of described impeller.
In addition.In order to strengthen the sealing of the PCS recirculating pump pump housing, described axle sleeve 5 and described impeller 3 arrange O-ring seals 51 between axially.
In addition, in order to strengthen the stability of PCS recirculating pump, increased a pump pin 6 in the bottom of described spiral case 21.Adopt O-ring seals to fix between described pump pin 6 and the described spiral case chamber 2,
The outer wall of the described spiral case chamber 2 directly over described pump pin 6 arranges pipe plug 27, when the PCS recirculating pump overhauls, described pipe plug 27 is extracted out, gets rid of the water in the PCS recirculating pump.
In order to improve the sealability of described spiral case chamber, between described spiral case chamber 2 and described pump cover 22, pad 26 is set, and fixes with bolt.
In addition.Also be provided with axial hole 221 on the described pump cover 22, be used for being communicated with mechanical seal chamber and the pumping chamber of described PCS recirculating pump.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, and be not to be used as limitation of the 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 (6)
1. a pump housing that is used for the PCS recirculating pump comprises suction chamber (1), spiral case chamber (2), pump shaft (4), impeller (3), pump cover (22) and axle sleeve (5); One end of described suction chamber (1) arranges suction flange (1), and the other end of described suction chamber (1) axially is connected with described spiral case chamber (2) by joint (12); Described impeller (3) places in the described spiral case chamber (2), and the rear end of described impeller (3) is socketed on the end of described pump shaft (5); And the front end of described impeller (3) and described joint (12) socket; Described axle sleeve (5) is socketed on the described pump shaft (4), and described pump cover (22) is socketed on the outer wall of described axle sleeve (5), and with axially sealing of described spiral case chamber (2); It is characterized in that:
Described spiral case chamber (2) is single volute type spiral case chamber, sets out water pipe (23) on the outer wall of described spiral case chamber (2), and the end of described outlet pipe (23) arranges outlet(discharge) flange (231); Form pumping chamber (25) between the inwall of described spiral case chamber (2), described pump cover (22) and the described impeller (3).
2. a kind of pump housing for the PCS recirculating pump according to claim 1, it is characterized in that: described suction chamber (1) is the straight-tapered suction chamber, the section area that the section area that the described suction flange (11) of described suction chamber (1) is located is located less than described joint (12).
3. a kind of pump housing for the PCS recirculating pump according to claim 1 and 2, it is characterized in that: between the rear end of described impeller (3) and the described pump cover (22) increasing back sealing ring (33) is set, between the front end of described impeller (3) and the described joint (12) front seal ring (32) is set, between described impeller (3) and the described pump shaft (4) impeller nut (34) is set.
4. a kind of pump housing for the PCS recirculating pump according to claim 1 and 2, it is characterized in that: described outlet pipe (23) is arranged at the top of described spiral case chamber (2), and described outlet pipe (23) is with vertical in the level ground.
5. a kind of pump housing for the PCS recirculating pump according to claim 1 and 2, it is characterized in that: described impeller (3) is enclosed impeller.
6. a kind of pump housing for the PCS recirculating pump according to claim 1 and 2, it is characterized in that: the bottom of described spiral case chamber (2) arranges pump pin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100833232A CN102889241A (en) | 2012-03-27 | 2012-03-27 | Pump body for PCS (passive containment cooling system) recirculating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100833232A CN102889241A (en) | 2012-03-27 | 2012-03-27 | Pump body for PCS (passive containment cooling system) recirculating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102889241A true CN102889241A (en) | 2013-01-23 |
Family
ID=47532870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100833232A Pending CN102889241A (en) | 2012-03-27 | 2012-03-27 | Pump body for PCS (passive containment cooling system) recirculating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889241A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB930474A (en) * | 1960-01-19 | 1963-07-03 | Res & Dev Pty Ltd | Improvements in centrifugal pumps and the like |
| JPH08144997A (en) * | 1994-11-25 | 1996-06-04 | Ebara Corp | Full circumferential flow type pump |
| CN201368052Y (en) * | 2008-11-30 | 2009-12-23 | 大连深蓝泵业有限公司 | Boric acid transfer pump used in PWR nuclear power plant |
| CN102116320A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Spent fuel pool cooling pump for nuclear power station |
| CN102146936A (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Chemical additive mixing pump for nuclear power station |
| CN201934389U (en) * | 2010-12-30 | 2011-08-17 | 上海阿波罗机械股份有限公司 | Boracic acid conveying pump for nuclear power plant |
| CN202597248U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Pump body for process control system (PCS) recirculation pump |
-
2012
- 2012-03-27 CN CN2012100833232A patent/CN102889241A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB930474A (en) * | 1960-01-19 | 1963-07-03 | Res & Dev Pty Ltd | Improvements in centrifugal pumps and the like |
| JPH08144997A (en) * | 1994-11-25 | 1996-06-04 | Ebara Corp | Full circumferential flow type pump |
| CN201368052Y (en) * | 2008-11-30 | 2009-12-23 | 大连深蓝泵业有限公司 | Boric acid transfer pump used in PWR nuclear power plant |
| CN102116320A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Spent fuel pool cooling pump for nuclear power station |
| CN102146936A (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Chemical additive mixing pump for nuclear power station |
| CN201934389U (en) * | 2010-12-30 | 2011-08-17 | 上海阿波罗机械股份有限公司 | Boracic acid conveying pump for nuclear power plant |
| CN202597248U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Pump body for process control system (PCS) recirculation pump |
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Application publication date: 20130123 |