CN102116320B - Spent fuel pool cooling pump for nuclear power station - Google Patents
Spent fuel pool cooling pump for nuclear power station Download PDFInfo
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- CN102116320B CN102116320B CN 201010613762 CN201010613762A CN102116320B CN 102116320 B CN102116320 B CN 102116320B CN 201010613762 CN201010613762 CN 201010613762 CN 201010613762 A CN201010613762 A CN 201010613762A CN 102116320 B CN102116320 B CN 102116320B
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Abstract
The invention discloses a spent fuel pool cooling pump for a nuclear power station, which is a cooling pump of a single-stage single-suction cantilever horizontal type, is convenient to maintain and has good shock resistant performance. The spent fuel pool cooling pump comprises a pump body, a pump cover provided with a mechanical sealing chamber, a pump shaft, an impeller, an impeller nut, a shaft sleeve, a bearing body, a cylindrical roller bearing and an diagonally contact ball bearing; a shaft sealing component comprises bearing oil sealing devices and a mechanical sealing device; the pump body is provided with a radial split type double spiral case structure; a suction inlet and a discharge outlet of the pump body are arranged perpendicularly; the pump cover is connected between the front end of the pump body and the rear end of the bearing body; a pre-connecting screw is arranged between the pump cover and the bearing body; the impeller is connected to the back end of the pump shaft through an impeller nut, wherein a steel wire thread sleeve is arranged in an inner cavity of the impeller nut; the cylindrical roller bearing is arranged at a non-drive end of the pump shaft; the diagonally contact ball bearing is arranged at a drive end of the pump shaft in a back to back manner; two sets of bearing oil sealing devices are provided and are both labyrinth sealing devices; and the mechanical sealing device is an assembled type mechanical sealing device.
Description
Technical field
The present invention relates to a kind of pump, be specifically related to a kind of used in nuclear power station spentnuclear fuel tank cooling pump of pressure.
Background technique
The major function of spentnuclear fuel tank cooling pump of pressure in nuclear power station is following:
1) cooling circuit is formed in the heat exchanger in pump and its loop, place, spentnuclear fuel pond, and in the loop, plays a part to carry feed liquid, serves the spentnuclear fuel pond;
2) the miscellaneous equipment composition cooling circuit in pump and its affiliated loop moves continuously, takes the after-heat that irradiated fuel assembly discharges in the spentnuclear fuel pond out of, and the restriction sump water temperature is not higher than 50 ℃.
Generally there are technical problems such as volume is big, maintenance inconvenience, shock resistance difference in current used in nuclear power station spentnuclear fuel tank cooling pump of pressure.Owing to receive the restriction in factory building mounting point and space, even after installing, overhaul also difficult sometimes.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of existing technology, a kind of used in nuclear power station spentnuclear fuel tank cooling pump of pressure is provided, technical problems such as volume is big, maintenance inconvenience, shock resistance difference that it can effectively solve.
The technological scheme that realizes above-mentioned purpose is: a kind of used in nuclear power station spentnuclear fuel tank cooling pump of pressure; For the cantilever of one step single sucking horizontal; It comprises stator module, rotor assembly, bearing unit and gland seal assembly, and said stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Said rotor assembly comprises a pump shaft, an impeller, an impeller nut and an axle sleeve; Said bearing unit comprises a bearing support, bearing, pair of bearings end cap and a bearing bracket; Said gland seal assembly comprises bearing enclosure device and mechanical seal device, it is characterized in that, the said pump housing is the double volute structure of radially split type, and the suction port of this pump housing is vertical with discharge opening to be provided with; Said pump cover is connected between the rear end of front end and said bearing support of the said pump housing, and is provided with preparatory joint bolt between said pump cover and the said bearing support; Said impeller is connected the rear end of said pump shaft through said impeller nut and is arranged in the inner chamber of the said pump housing, and the inner chamber of this impeller nut is provided with steel-wire screw-socket; Said axle sleeve is sleeved on the rear portion of said pump shaft, the front outer chamfering of this axle sleeve; The middle part of said bearing support and front end are respectively equipped with a bearing groove; Said bearing comprises that one is located on the anti-drive end of said pump shaft and the roller bearing and a pair of that is arranged in the middle part bearing groove of said bearing support is located on the drive end of said pump shaft back-to-back with arranging and is arranged in the angular contact ball bearing of the front end bearing groove of said bearing support; Said pair of bearings end cap lay respectively at said roller bearing trailing flank and said angular contact ball bearing leading flank and be separately fixed on the ear end face of said middle part bearing groove and on the front-end face of said front end bearing groove; Between said roller bearing and the said bearing (ball) cover and between said angular contact ball bearing and the said bearing (ball) cover oil baffle disc is set respectively; Said bearing enclosure device is labyrinth seal structure and is made up of said bearing (ball) cover, said oil baffle disc and O-ring seals; Said mechanical seal device is an integrated mechanical sealing device, and it is installed on the said pump shaft and is arranged in the mechanical seal chamber of said pump cover.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, said mechanical seal device comprises machine envelope axle sleeve, a machine sealed cover, a stationary ring, a rotating seat, a rotating ring, some springs and a fixed base; Said machine envelope axle sleeve is enclosed within on the said pump shaft regularly and said machine seals the front portion of the rear sleeve of axle sleeve at said axle sleeve; Radially extend a bulge loop on the rearward end outer surface of this machine envelope axle sleeve; The forward outer surface of this machine envelope axle sleeve is provided with an annular groove, in this annular groove, clamps an assembled plate; Said machine sealed cover is enclosed within on the said machine envelope axle sleeve and is fixed on the said pump cover, and the front-end face of this machine sealed cover is resisted against on the ear end face of said assembled plate; Said stationary ring is installed in the inner chamber of said machine sealed cover; Said rotating seat is enclosed within regularly on the said machine envelope axle sleeve and is resisted against on the front-end face of said bulge loop, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and on step surface, be uniformly distributed with and offer some blind holes; Said rotating ring is installed in the anterior inner chamber of said rotating seat and can be enclosed within on the said machine envelope axle sleeve with moving axially; Said some springs are placed in the blind hole of said rotating seat one by one, and the front end of these some springs is connected on the ear end face of said rotating ring, so that the ear end face of the front-end face of said rotating ring and said stationary ring is fitted; Said fixed seating is fixed together fixed base, said machine envelope axle sleeve and said pump shaft at the anterior of said machine envelope axle sleeve and through bolt.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure; Wherein, between the internal surface of the outer surface of said stationary ring and said machine sealed cover, between the outer surface of the internal surface of said machine envelope axle sleeve and said pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of said machine sealed cover and said pump cover.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, said machine sealed cover is provided with one and draws small opening.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure; Wherein, Said oil baffle disc comprises sleeve and the block plate that on the outer surface of the medial segment of this sleeve, radially extends; The edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and said oil baffle disc is fixed on the said pump shaft and near said bearing; Said bearing (ball) cover comprises enclosing cover and on the inner peripheral end surfaces of this enclosing cover, encircles in axially extended towards the bearing side; Should radially extend a flange by the interior free end that encircles; The inner cavity surface of said bearing (ball) cover is provided with some labyrinth sealing grooves; The inner ring sleeve of said bearing (ball) cover is on the sleeve of said oil baffle disc, so that said labyrinth sealing groove is facing to the sleeve of said oil baffle disc; Said O-ring seals is located between the sleeve interior surface and said pump shaft of said oil baffle disc; Sleeve outer diameter on the internal diameter of said bearing (ball) cover and the said oil baffle disc is a Spielpassung; Limit cover on flange on the said bearing (ball) cover and the said oil baffle disc is for Spielpassung, so that the limit enclosure on the said oil baffle disc is outside the flange of bearing (ball) cover.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, the gap between the sleeve outer diameter on the internal diameter of said bearing (ball) cover and the said oil baffle disc is 0.204～0.296mm; Gap between the front-end face of the block plate on the ear end face of the flange on the said bearing (ball) cover and the said oil baffle disc is 1～1.5mm.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, the outer surface of the flange on the said bearing (ball) cover is a conical surface, the internal surface of limit on said oil baffle disc cover is the adaptive conical surface of tapering with the outer surface of this flange.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure wherein, also can be provided with locking nut and packing ring between said oil baffle disc and the said a pair of angular contact ball bearing.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, offer on the said pump cover one be communicated to the mechanical seal chamber of said pump cover flushing hole.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure wherein, is laid with some heat radiation gussets on the outer surface of said bearing support.
The technological scheme of used in nuclear power station spentnuclear fuel tank cooling pump of pressure of the present invention, the pump housing adopts the double volute structure of radially split type, but the radial force that the active balance pump produces in the running makes more stability and safety of pump work, has effectively reduced pump group volume simultaneously; Integrated mechanical sealing is adopted in mechanical seal, can prevent reliably that medium from leaking, and easy accessibility has reduced maintenance load; Bearing part adopts the thin oil selflubricating, and no forced lubricating system guarantees that pump starts at pre-lubrication fast; The flushing of axle envelope is employed in the mode of directly offering flushing hole on the pump cover and washes, and has simplified flushing line; Bearing support is provided with the heat radiation gusset, has increased the heat exchange area of bearing support and air, has improved the intensity and the rigidity of bearing support, guarantees the mechanical property that pump is in operation; Be provided with preparatory joint bolt between pump cover and bearing support, can effectively reduce alignment error, also make things convenient for the installation and removal of pump group simultaneously; In impeller nut, be equipped with steel-wire screw-socket, can effectively prevent pump impeller nut loosening under the counter-rotating situation, guaranteed pump group reliability of operation and Security; The pump coupling adopts metal flexible film chip coupling, utilizes the flexible of diaphragm can effectively compensate the relative displacement between pump shaft and motor shaft, and has the bumper and absorbing shock function, has guaranteed the safe and reliable operation of pump.The present invention and prior art contrast, and its effect is positive and tangible, can effectively solve technical problems such as volume is big, maintenance inconvenience, shock resistance difference.
Description of drawings
Fig. 1 is the structural representation of used in nuclear power station spentnuclear fuel tank cooling pump of pressure of the present invention;
Fig. 2 is the structural representation of coolant pump middle (center) bearing oil-sealing arrangement of the present invention;
Fig. 3 is the structural representation of the oil baffle disc in the bearing enclosure device of the present invention;
Fig. 4 is the structural representation of the bearing (ball) cover in the bearing enclosure device of the present invention;
Fig. 5 is the structural representation of mechanical seal device in the coolant pump of the present invention;
Fig. 6 is that the K of Fig. 5 is to view.
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, used in nuclear power station spentnuclear fuel tank cooling pump of pressure of the present invention, horizontal for the cantilever of one step single sucking, it comprises stator module, rotor assembly, bearing unit and gland seal assembly.Stator module comprises that a pump housing 1, has the pump cover 4 and a casing ring 2 of mechanical seal chamber; Rotor assembly comprises a pump shaft 9, an impeller 3, an impeller nut 30 and an axle sleeve 10; Bearing unit comprises a bearing support 15, bearing, pair of bearings end cap 8 and a bearing bracket 16; Gland seal assembly comprises bearing enclosure device 7 and mechanical seal device 5.Wherein:
The pump housing 1 is the double volute structure of radially split type, and the suction port of this pump housing 1 is vertical with discharge opening; Be provided with the intermediate section dividing plate in the pump housing 1;
Pump cover 4 is connected between the end of front end and bearing support 15 of the pump housing 1, and is provided with preparatory joint bolt 18 between pump cover 4 and the bearing support 15, can effectively reduce alignment error, also makes things convenient for the installation and removal of pump group simultaneously;
Impeller 3 is connected the rear end of pump shaft 9 through impeller nut 30 and is arranged in the inner chamber of the pump housing 1, and the inner chamber of this impeller nut 30 is provided with steel-wire screw-socket, can prevent effectively that pump impeller nut 30 under the counter-rotating situation is loosening, has guaranteed pump group reliability of operation and Security;
Axle sleeve 10 is sleeved on the rear portion of pump shaft 9, the front outer chamfering of this axle sleeve 10;
The middle part of bearing support 15 and front end are respectively equipped with a bearing groove;
Bearing comprises a roller bearing 11 and a pair of angular contact ball bearing 12; Roller bearing 11 is located on the anti-drive end of pump shaft 9 and is installed in the middle part bearing groove of bearing support 15, and a pair of angular contact ball bearing 12 is located on the drive end of pump shaft 9 back-to-back with arranging and is installed in the front end bearing groove of bearing support 15;
Pair of bearings end cap 8 lay respectively at roller bearing 11 inboard and angular contact ball bearing 12 the outside and be separately fixed on the front-end face of front end bearing groove and on the ear end face of middle part bearing groove;
Between roller bearing 11 and the said bearing (ball) cover 8 and between angular contact ball bearing 12 and the bearing (ball) cover 8 oil baffle disc 70 is set respectively;
Bearing enclosure device 7 constitutes (seeing Fig. 2 to Fig. 4) for labyrinth seal structure and by oil baffle disc 70, bearing (ball) cover 8 and O-ring seals 6, wherein:
O-ring seals 6 is arranged between sleeve 71 internal surfaces and pump shaft 9 of oil baffle disc 70;
Bearing (ball) cover 8 comprise enclosing cover 81 and on the inner peripheral end surfaces of this enclosing cover 81 towards the bearing side axially extended in ring 82, encircle 82 free end in this and radially extend a flange 83, the inner cavity surface of bearing (ball) cover 8 is provided with twice labyrinth sealing groove 84; The interior ring 82 of bearing (ball) cover 8 is enclosed within outside the sleeve 71 of oil baffle disc 70, so that labyrinth sealing groove 84 is facing to the sleeve 71 of oil baffle disc 70;
Sleeve 71 external diameters on the internal diameter of bearing (ball) cover 8 and the oil baffle disc 70 are Spielpassung, and the gap delta between them is 0.204～0.296mm;
It is Spielpassung that flange 83 on the bearing (ball) cover 8 covers 73 with the limit on the oil baffle disc 70, so that the cover of the limit on the oil baffle disc 70 73 is enclosed within outside the flange 83 of bearing (ball) cover 8; Gap L between the ear end face of the flange 83 on the bearing (ball) cover 8 and the front-end face of the block plate 72 on the oil baffle disc 70 is 1～1.5mm;
The outer surface of the flange 83 on the bearing (ball) cover 8 is a conical surface, and the internal surface of limit on the oil baffle disc 70 cover 73 is the adaptive conical surface of tapering with the outer surface of this flange 83;
Also can be provided with locking nut 13 and packing ring 14 between oil baffle disc 70 and a pair of angular contact ball bearing 12.
The centripetal force that in the pump operation process, produces; When making bearing oil produce axial flow, owing to be provided with O-ring seals 6 between the inner cavity surface of oil baffle disc 70 and the pump shaft 9, so lubricant oil can not be from the slit seepage between oil baffle disc 70 and the pump shaft 9; And the stopping of block plate 72 that at first receives oil baffle disc 70; Under the action of centrifugal force of block plate 72, force lubricant oil to change the former direction that axially flows, be thrown toward very soon block plate 72 around; Can lubricant oil well be remained in the space of 8 of bearing support 15 and bearing (ball) covers; Rely on the oil level discrepancy in elevation and turning effort to make lubricant oil get back in the chamber of bearing and cooling again, form circulation together, can guarantee the stability and the reliability of bearing lubrication.A part produces axial flow and spills the trend of bearing (ball) cover 8 at the lubricant oil in block plate 72 outsides; Through the tortuous circuitous gap of the bearing (ball) cover 8 and the mazy type of oil baffle disc 70 formation; Because multichannel is multiple to be stopped, reduces pressure; Leakage rate is effectively suppressed, and leakage rate is minimum, has effectively guaranteed the normal use of bearing.And external dust and other impurities will be passed through equally through the multiple of labyrinth sealing groove 84 on the bearing (ball) cover 8 and stopped, thus the trend that has stoped dust and other impurities to get into bearing (ball) cover 8.
Mechanical seal device 5 is integrated mechanical sealing device (seeing Fig. 5 and Fig. 6), and it is installed on the pump shaft 9 and is arranged in the mechanical seal chamber of pump cover 4, can prevent reliably that medium from leaking, and easy accessibility has reduced maintenance load.This mechanical seal device 5 comprises machine envelope axle sleeve 51, a machine sealed cover 52, a stationary ring 53, a rotating seat 54, a rotating ring 55, some springs 56 and a fixed base 58.Wherein:
Machine envelope axle sleeve 51 is enclosed within on the pump shaft 9 regularly; And the rear sleeve of machine envelope axle sleeve 51 is in the front portion of axle sleeve 10; Be provided with O-ring seals 90 between this machine envelope axle sleeve 51 and the axle sleeve 10; Radially extend a bulge loop 511 on the rearward end outer surface of this machine envelope axle sleeve 51, the forward outer surface of this machine envelope axle sleeve 51 is provided with an annular groove, in this annular groove, clamps an assembled plate 57; Machine sealed cover 52 is enclosed within on the machine envelope axle sleeve 51 and through double-screw bolt 41 and nut 42 and is fixed on the pump cover 4, and the front-end face of machine sealed cover 52 is resisted against on the ear end face of assembled plate 57; Stationary ring 53 is installed in the inner chamber of machine sealed cover 52; Rotating seat 54 is enclosed within regularly on the machine envelope axle sleeve 51 and is resisted against on the front-end face of bulge loop 511 through pressing closer screw 60, the inner chamber of this rotating seat 54 be the back little before big one-level stepped shaft cylndrical surface, and on step surface, be uniformly distributed with and offer some blind holes; Rotating ring 55 is installed in the anterior inner chamber of rotating seat 54 and can be enclosed within on the machine envelope axle sleeve 51 with moving axially; Some springs 56 are placed in the blind hole of rotating seat 54 one by one, and the front end of these some springs 56 is connected on the ear end face of rotating ring 55, so that the ear end face of the front-end face of rotating ring 55 and stationary ring 53 appropriateness is fitted; Fixed base 58 is enclosed within the anterior of machine envelope axle sleeve 51 and through bolt 580 fixed base 58, machine envelope axle sleeve 51 and pump shaft 9 is fixed together.
Be provided with O-ring seals 91 between the middle part internal surface of machine envelope axle sleeve 51 and the outer surface of pump shaft 9, can prevent that the liquid in the pump from going out through the clearance leakage between machine envelope axle sleeve 51 and the pump shaft 9;
Be provided with O-ring seals 92 between the front-end face of the ear end face of machine sealed cover 52 and pump cover 4, can prevent that the liquid in the pump from going out through the clearance leakage between machine sealed cover 52 and the pump cover 4;
Be provided with O-ring seals 93 between the internal surface of the outer surface of stationary ring 53 and machine sealed cover 52, can prevent that the liquid in the pump from going out through the clearance leakage between stationary ring 53 and the machine sealed cover 52.
The working principle of mechanical seal device 5 is: in the pump operation process; 50 can form to be full of and have the certain pressure fed sheet of a media in the chamber that the mechanical seal chamber of pump cover 4 and machine sealed cover 52 constitute; Because the both ends of the surface area that rotating ring 55 is stressed does not wait; Can form the impacting force towards stationary ring 53 directions, the surface of contact appropriateness that make dynamic and static ring 55, forms between 53 is fitted, and keeps the purpose that one deck liquid film as thin as a wafer reaches sealing between this surface of contact thereby so make.
Radially offer one on the machine sealed cover 52 and draw small opening 520 (D), reclaim, guarantee the Security and the reliability of unit operation if can draw small opening 520 through this when having micro-amounts of liquids in the pump to leak.Also radially offer washing solution inlet FI, quench liquid inlet QI and quench liquid outlet DO on the machine sealed cover 52.
Offer on the pump cover 4 one be communicated to the mechanical seal chamber of pump cover 4 flushing hole 40, can be directly dynamic and static ring 55, the surface of contact that forms between 53 be washed.Than using external flushing line, have advantages such as simple in structure, safe and reliable.
Be laid with some heat radiation gussets 17 on the outer surface of bearing support 15.Increased the heat exchange area of bearing support 15, improved bearing support 15 intensity and rigidity, guaranteed the mechanical property that pump is in operation with air.
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 (8)
1. used in nuclear power station spentnuclear fuel tank cooling pump of pressure, horizontal for the cantilever of one step single sucking, it comprises stator module, rotor assembly, bearing unit and gland seal assembly, said stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Said rotor assembly comprises a pump shaft, an impeller, an impeller nut and an axle sleeve; Said bearing unit comprises a bearing support, bearing, pair of bearings end cap and a bearing bracket; Said gland seal assembly comprises bearing enclosure device and mechanical seal device, it is characterized in that,
The said pump housing is the double volute structure of radially split type, and the suction port of this pump housing is vertical with discharge opening to be provided with;
Said pump cover is connected between the rear end of front end and said bearing support of the said pump housing, and is provided with preparatory joint bolt between said pump cover and the said bearing support;
Said impeller is connected the rear end of said pump shaft through said impeller nut and is arranged in the inner chamber of the said pump housing, and the inner chamber of this impeller nut is provided with steel-wire screw-socket;
Said axle sleeve is sleeved on the rear portion of said pump shaft, the front outer chamfering of this axle sleeve;
The middle part of said bearing support and front end are respectively equipped with a bearing groove;
Said bearing comprises that one is located on the anti-drive end of said pump shaft and the roller bearing and a pair of that is arranged in the middle part bearing groove of said bearing support is located on the drive end of said pump shaft back-to-back with arranging and is arranged in the angular contact ball bearing of the front end bearing groove of said bearing support;
Said pair of bearings end cap lay respectively at said roller bearing trailing flank and said angular contact ball bearing leading flank and be separately fixed on the ear end face of said middle part bearing groove and on the front-end face of said front end bearing groove;
Between said roller bearing and the said bearing (ball) cover and between said angular contact ball bearing and the said bearing (ball) cover oil baffle disc is set respectively;
Said bearing enclosure device is labyrinth seal structure and is made up of said bearing (ball) cover, said oil baffle disc and O-ring seals;
Said mechanical seal device is an integrated mechanical sealing device, and it is installed on the said pump shaft and is arranged in the mechanical seal chamber of said pump cover,
Said mechanical seal device comprises machine envelope axle sleeve, a machine sealed cover, a stationary ring, a rotating seat, a rotating ring, some springs and a fixed base; Said machine envelope axle sleeve is enclosed within on the said pump shaft regularly and said machine seals the front portion of the rear sleeve of axle sleeve at said axle sleeve; Radially extend a bulge loop on the rearward end outer surface of this machine envelope axle sleeve; The forward outer surface of this machine envelope axle sleeve is provided with an annular groove, in this annular groove, clamps an assembled plate; Said machine sealed cover is enclosed within on the said machine envelope axle sleeve and is fixed on the said pump cover, and the front-end face of this machine sealed cover is resisted against on the ear end face of said assembled plate; Said stationary ring is installed in the inner chamber of said machine sealed cover; Said rotating seat is enclosed within regularly on the said machine envelope axle sleeve and is resisted against on the front-end face of said bulge loop, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and on step surface, be uniformly distributed with and offer some blind holes; Said rotating ring is installed in the anterior inner chamber of said rotating seat and can be enclosed within on the said machine envelope axle sleeve with moving axially; Said some springs are placed in the blind hole of said rotating seat one by one, and the front end of these some springs is connected on the ear end face of said rotating ring, so that the ear end face of the front-end face of said rotating ring and said stationary ring is fitted; Said fixed seating is fixed together fixed base, said machine envelope axle sleeve and said pump shaft at the anterior of said machine envelope axle sleeve and through bolt,
Said oil baffle disc comprises sleeve and the block plate that on the outer surface of the medial segment of this sleeve, radially extends; The edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and said oil baffle disc is fixed on the said pump shaft and near said bearing;
Said bearing (ball) cover comprises enclosing cover and on the inner peripheral end surfaces of this enclosing cover, encircles in axially extended towards the bearing side; Should radially extend a flange by the interior free end that encircles; The inner cavity surface of said bearing (ball) cover is provided with some labyrinth sealing grooves; The inner ring sleeve of said bearing (ball) cover is on the sleeve of said oil baffle disc, so that said labyrinth sealing groove is facing to the sleeve of said oil baffle disc;
Said O-ring seals is located between the sleeve interior surface and said pump shaft of said oil baffle disc;
Sleeve outer diameter on the internal diameter of said bearing (ball) cover and the said oil baffle disc is a Spielpassung;
Limit cover on flange on the said bearing (ball) cover and the said oil baffle disc is for Spielpassung, so that the limit enclosure on the said oil baffle disc is outside the flange of bearing (ball) cover.
2. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1; It is characterized in that, between the internal surface of the outer surface of said stationary ring and said machine sealed cover, between the outer surface of the internal surface of said machine envelope axle sleeve and said pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of said machine sealed cover and said pump cover.
3. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that said machine sealed cover is provided with one and draws small opening.
4. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that the gap between the sleeve outer diameter on the internal diameter of said bearing (ball) cover and the said oil baffle disc is 0.204～0.296mm; Gap between the front-end face of the block plate on the ear end face of the flange on the said bearing (ball) cover and the said oil baffle disc is 1～1.5mm.
5. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1; It is characterized in that; The outer surface of the flange on the said bearing (ball) cover is a conical surface, and the internal surface of limit on said oil baffle disc cover is the adaptive conical surface of tapering with the outer surface of this flange.
6. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that, also is provided with locking nut and packing ring between said oil baffle disc and the said a pair of angular contact ball bearing.
7. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that, offer on the said pump cover one be communicated to the mechanical seal chamber of said pump cover flushing hole.
8. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that, is laid with some heat radiation gussets on the outer surface of said bearing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010613762 CN102116320B (en) | 2010-12-30 | 2010-12-30 | Spent fuel pool cooling pump for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010613762 CN102116320B (en) | 2010-12-30 | 2010-12-30 | Spent fuel pool cooling pump for nuclear power station |
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| Publication Number | Publication Date |
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| CN102116320A CN102116320A (en) | 2011-07-06 |
| CN102116320B true CN102116320B (en) | 2012-07-04 |
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| CN 201010613762 Active CN102116320B (en) | 2010-12-30 | 2010-12-30 | Spent fuel pool cooling pump for nuclear power station |
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| CN2475857Y (en) * | 2001-03-22 | 2002-02-06 | 大连深蓝泵业有限公司 | Petroleum chemical flow-process pump |
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| CN201057153Y (en) * | 2007-05-24 | 2008-05-07 | 刘坤华 | Improved construction of cooling pump |
| CN101749267A (en) * | 2008-11-30 | 2010-06-23 | 大连深蓝泵业有限公司 | Spent fuel water tank cooling pump of pressure water reactor nuclear power plant |
| CN201944013U (en) * | 2010-12-30 | 2011-08-24 | 上海阿波罗机械股份有限公司 | Spent fuel water pool cooling pump for nuclear power station |
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| CN103994222B (en) * | 2013-02-18 | 2016-06-08 | 祥景精机股份有限公司 | Shaft seal |
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