CN102116320A - Spent fuel pool cooling pump for nuclear power station - Google Patents
Spent fuel pool cooling pump for nuclear power station Download PDFInfo
- Publication number
- CN102116320A CN102116320A CN 201010613762 CN201010613762A CN102116320A CN 102116320 A CN102116320 A CN 102116320A CN 201010613762 CN201010613762 CN 201010613762 CN 201010613762 A CN201010613762 A CN 201010613762A CN 102116320 A CN102116320 A CN 102116320A
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- bearing
- cover
- pump
- ball
- axle sleeve
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- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 239000002915 spent fuel radioactive waste Substances 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 8
- 239000000314 lubricant Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 as follows:
1) cooling circuit is formed in the heat exchanger in pump and its loop, place, spentnuclear fuel pond, and plays a part to carry feed liquid in the loop, 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 be subjected to 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 deficiencies in the prior art, 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 described stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Described rotor assembly comprises a pump shaft, an impeller, an impeller nut and an axle sleeve; Described bearing unit comprises a bearing support, bearing, pair of bearings end cap and a bearing bracket; Described gland seal assembly comprises bearing enclosure device and mechanical seal device.Wherein: the described 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; Described pump cover is connected between the rear end of the front end of the described pump housing and described bearing support, and is provided with pre-joint bolt between described pump cover and the described bearing support; Described impeller is connected the rear end of described pump shaft by described impeller nut and is arranged in the inner chamber of the described pump housing, and the inner chamber of this impeller nut is provided with steel-wire screw-socket; Described axle sleeve is sleeved on the front portion of described pump shaft, the front outer chamfering of this axle sleeve; The middle part of described bearing support and front end are respectively equipped with a bearing groove; Described bearing comprise one be located on the anti-drive end of described pump shaft and be arranged in the roller bearing of middle part bearing groove of described bearing support and a pair of drive end that is located at described pump shaft back-to-back with arranging on and be arranged in the angular contact ball bearing of the front end bearing groove of described bearing support; Described pair of bearings end cap lay respectively at described roller bearing inboard and described angular contact ball bearing the outside and be separately fixed on the front-end face of described front end bearing groove and on the ear end face of described middle part bearing groove; Between described roller bearing and the described bearing (ball) cover and between described angular contact ball bearing and the described bearing (ball) cover oil baffle disc is set respectively; Described bearing enclosure device is labyrinth seal structure and is made of described bearing (ball) cover, described oil baffle disc and O-ring seals; Described mechanical seal device is the integrated mechanical sealing setting, and it is installed on the described pump shaft and is arranged in the mechanical seal chamber of described pump cover.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, described 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; Described machine envelope axle sleeve is enclosed within on the described pump shaft regularly and described machine seals the front portion of the rear sleeve of axle sleeve at described 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, clamps an assembled plate in this annular groove; Described machine sealed cover is enclosed within on the described machine envelope axle sleeve and is fixed on the described pump cover, and the front-end face of this machine sealed cover is resisted against on the ear end face of described assembled plate; Described stationary ring is installed in the inner chamber of described machine sealed cover; Described rotating seat is enclosed within regularly on the described machine envelope axle sleeve and is resisted against on the front-end face of described bulge loop, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and uniformly on step surface offer some blind holes; Described rotating ring is installed in the anterior inner chamber of described rotating seat and can be enclosed within on the described machine envelope axle sleeve with moving axially; Described some springs are placed in the blind hole of described rotating seat one by one, and the front end of these some springs is connected on the ear end face of described rotating ring, so that the ear end face of the front-end face of described rotating ring and described stationary ring is fitted; Described fixed seating is fixed together fixed base, described machine envelope axle sleeve and described pump shaft at the anterior of described machine envelope axle sleeve and by 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 described stationary ring and described machine sealed cover, between the outer surface of the internal surface of described machine envelope axle sleeve and described pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of described machine sealed cover and described pump cover.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure, wherein, described 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, described oil baffle disc comprises sleeve and the block plate that radially extends on the outer surface of the medial segment of this sleeve, the edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and described oil baffle disc is fixed on the described pump shaft and near described bearing; Described bearing (ball) cover comprises enclosing cover and encircles in axially extended towards the bearing side on the inner peripheral end surfaces of this enclosing cover, should radially extend a flange by the interior free end that encircles, the inner cavity surface of described bearing (ball) cover is provided with some labyrinth sealing grooves, the inner ring sleeve of described bearing (ball) cover is on the sleeve of described oil baffle disc, so that described labyrinth sealing groove is facing to the sleeve of described oil baffle disc; Described O-ring seals is located between the sleeve interior surface and described pump shaft of described oil baffle disc; Sleeve outer diameter on the internal diameter of described bearing (ball) cover and the described oil baffle disc is a Spielpassung; Limit cover on flange on the described bearing (ball) cover and the described oil baffle disc is for Spielpassung, so that the limit enclosure on the described 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 described bearing (ball) cover and the described 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 described bearing (ball) cover and the described 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 described bearing (ball) cover is a conical surface, the internal surface of limit on described 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 described oil baffle disc and the described a pair of angular contact ball bearing.
Above-mentioned used in nuclear power station spentnuclear fuel tank cooling pump of pressure wherein, is offered a flushing hole that is communicated to the mechanical seal chamber of described pump cover on the described pump cover.
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 described 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 fast at pre-lubrication; The flushing of axle envelope adopts the mode of directly offering flushing hole on pump cover to wash, 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 pre-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 relative displacement that can effectively compensate between pump shaft and motor shaft of diaphragm, 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 by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
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;
Impeller 3 is connected the rear end of pump shaft 9 by 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;
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 lays respectively at the outside of the inboard of roller bearing 11 and angular contact ball bearing 12 and is 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 described 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, therefore lubricant oil can not be from the slit seepage between oil baffle disc 70 and the pump shaft 9, and at first be subjected to the stopping of block plate 72 of 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, lubricant oil well can 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, leakage rate is minimum, has effectively guaranteed the normal use of bearing.And external dust and other impurities equally will be through stopping by the multiple of labyrinth sealing groove 84 on the bearing (ball) cover 8, thereby stoped dust and other impurities to enter the trend of bearing (ball) cover 8.
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, clamps an assembled plate 57 in this annular groove; Machine sealed cover 52 is enclosed within on the machine envelope axle sleeve 51 and by 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 by 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 uniformly on step surface 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 by 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 by 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 by 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 by 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 impacting force towards stationary ring 53 directions, the surface of contact appropriateness that forms between the dynamic and static ring 55,53 is fitted, keep 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 by 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 a flushing hole 40 that is communicated to the mechanical seal chamber of pump cover 4 on the pump cover 4, can directly wash the surface of contact that forms between the dynamic and static ring 55,53.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 illustrating 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 (10)
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, described stator module comprises that a pump housing, has the pump cover and a casing ring of mechanical seal chamber; Described rotor assembly comprises a pump shaft, an impeller, an impeller nut and an axle sleeve; Described bearing unit comprises a bearing support, bearing, pair of bearings end cap and a bearing bracket; Described gland seal assembly comprises bearing enclosure device and mechanical seal device, it is characterized in that,
The described 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;
Described pump cover is connected between the rear end of the front end of the described pump housing and described bearing support, and is provided with pre-joint bolt between described pump cover and the described bearing support;
Described impeller is connected the rear end of described pump shaft by described impeller nut and is arranged in the inner chamber of the described pump housing, and the inner chamber of this impeller nut is provided with steel-wire screw-socket;
Described axle sleeve is sleeved on the front portion of described pump shaft, the front outer chamfering of this axle sleeve;
The middle part of described bearing support and front end are respectively equipped with a bearing groove;
Described bearing comprise one be located on the anti-drive end of described pump shaft and be arranged in the roller bearing of middle part bearing groove of described bearing support and a pair of drive end that is located at described pump shaft back-to-back with arranging on and be arranged in the angular contact ball bearing of the front end bearing groove of described bearing support;
Described pair of bearings end cap lay respectively at described roller bearing inboard and described angular contact ball bearing the outside and be separately fixed on the front-end face of described front end bearing groove and on the ear end face of described middle part bearing groove;
Between described roller bearing and the described bearing (ball) cover and between described angular contact ball bearing and the described bearing (ball) cover oil baffle disc is set respectively;
Described bearing enclosure device is labyrinth seal structure and is made of described bearing (ball) cover, described oil baffle disc and O-ring seals;
Described mechanical seal device is the integrated mechanical sealing setting, and it is installed on the described pump shaft and is arranged in the mechanical seal chamber of described pump cover.
2. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that, described 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; Described machine envelope axle sleeve is enclosed within on the described pump shaft regularly and described machine seals the front portion of the rear sleeve of axle sleeve at described 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, clamps an assembled plate in this annular groove; Described machine sealed cover is enclosed within on the described machine envelope axle sleeve and is fixed on the described pump cover, and the front-end face of this machine sealed cover is resisted against on the ear end face of described assembled plate; Described stationary ring is installed in the inner chamber of described machine sealed cover; Described rotating seat is enclosed within regularly on the described machine envelope axle sleeve and is resisted against on the front-end face of described bulge loop, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and uniformly on step surface offer some blind holes; Described rotating ring is installed in the anterior inner chamber of described rotating seat and can be enclosed within on the described machine envelope axle sleeve with moving axially; Described some springs are placed in the blind hole of described rotating seat one by one, and the front end of these some springs is connected on the ear end face of described rotating ring, so that the ear end face of the front-end face of described rotating ring and described stationary ring is fitted; Described fixed seating is fixed together fixed base, described machine envelope axle sleeve and described pump shaft at the anterior of described machine envelope axle sleeve and by bolt.
3. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 2, it is characterized in that, between the internal surface of the outer surface of described stationary ring and described machine sealed cover, between the outer surface of the internal surface of described machine envelope axle sleeve and described pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of described machine sealed cover and described pump cover.
4. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 2 is characterized in that described machine sealed cover is provided with one and draws small opening.
5. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1, it is characterized in that, described oil baffle disc comprises sleeve and the block plate that radially extends on the outer surface of the medial segment of this sleeve, the edge of this block plate is that 14 °～16 ° mode bends cover on one side with the angle with its axis laterally, and described oil baffle disc is fixed on the described pump shaft and near described bearing;
Described bearing (ball) cover comprises enclosing cover and encircles in axially extended towards the bearing side on the inner peripheral end surfaces of this enclosing cover, should radially extend a flange by the interior free end that encircles, the inner cavity surface of described bearing (ball) cover is provided with some labyrinth sealing grooves, the inner ring sleeve of described bearing (ball) cover is on the sleeve of described oil baffle disc, so that described labyrinth sealing groove is facing to the sleeve of described oil baffle disc;
Described O-ring seals is located between the sleeve interior surface and described pump shaft of described oil baffle disc;
Sleeve outer diameter on the internal diameter of described bearing (ball) cover and the described oil baffle disc is a Spielpassung;
Limit cover on flange on the described bearing (ball) cover and the described oil baffle disc is for Spielpassung, so that the limit enclosure on the described oil baffle disc is outside the flange of bearing (ball) cover.
6. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 5 is characterized in that the gap between the sleeve outer diameter on the internal diameter of described bearing (ball) cover and the described 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 described bearing (ball) cover and the described oil baffle disc is 1～1.5mm.
7. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 5, it is characterized in that, the outer surface of the flange on the described bearing (ball) cover is a conical surface, and the internal surface of limit on described oil baffle disc cover is the adaptive conical surface of tapering with the outer surface of this flange.
8. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 5 is characterized in that, also can be provided with locking nut and packing ring between described oil baffle disc and the described a pair of angular contact ball bearing.
9. used in nuclear power station spentnuclear fuel tank cooling pump of pressure according to claim 1 is characterized in that, offers a flushing hole that is communicated to the mechanical seal chamber of described pump cover on the described pump cover.
10. 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 described 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 |
|---|---|
| CN102116320A true CN102116320A (en) | 2011-07-06 |
| CN102116320B CN102116320B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410243A (en) * | 2011-12-08 | 2012-04-11 | 无锡市金城泵业制造有限公司 | Anti-particle structure for turbid water pump seal |
| CN102606509A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Connection structure for PCS (Passive Containment Cooling System) recirculation pump |
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| CN102606507A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing body mounting structure for PCS (Passive Containment Cooling System) recirculation pump |
| CN102678932A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | A double-end mechanical seal without auxiliary system |
| CN102889241A (en) * | 2012-03-27 | 2013-01-23 | 上海阿波罗机械股份有限公司 | Pump body for PCS (passive containment cooling system) recirculating pump |
| CN103615407A (en) * | 2013-11-28 | 2014-03-05 | 江苏振华泵业制造有限公司 | Water cooling shaft seal structure arranged in vertical centrifugal pump |
| CN104265678A (en) * | 2014-09-26 | 2015-01-07 | 浙江理工大学 | Sealing mechanism for gap between impeller and volute |
| CN106870391A (en) * | 2017-03-13 | 2017-06-20 | 钟浪雅 | A kind of waterproof portable type water pump for surveying water velocity |
| CN107100851A (en) * | 2017-04-19 | 2017-08-29 | 陕西科技大学 | A kind of single-suction urine pump |
| CN111322268A (en) * | 2020-04-14 | 2020-06-23 | 江门市新会区龙泉污水处理有限公司 | Mechanical seal structure of slurry pump |
| CN111980954A (en) * | 2020-08-26 | 2020-11-24 | 南京工程学院 | A protection mechanism arranged at the mechanical seal of a mining high-speed emergency pump |
| CN113212134A (en) * | 2021-06-18 | 2021-08-06 | 中国第一汽车股份有限公司 | Electric drive assembly and vehicle |
| CN113236553A (en) * | 2021-05-24 | 2021-08-10 | 大连冰山帕特技术有限公司 | Two-tooth-difference high-pressure oil pump for high-pressure screw compressor |
| CN114033748A (en) * | 2021-11-25 | 2022-02-11 | 安徽莱恩电泵有限公司 | Spent fuel pool cooling pump for nuclear power station |
| CN114320927A (en) * | 2021-12-02 | 2022-04-12 | 安徽莱恩电泵有限公司 | Back-flushing pump of circulating water filtering system of nuclear power station |
| CN114673731A (en) * | 2022-04-14 | 2022-06-28 | 山东齐鲁电机制造有限公司 | Vertical motor bearing leak protection oil structure |
| CN115095526A (en) * | 2022-06-16 | 2022-09-23 | 浙江南元泵业有限公司 | Horizontal centrifugal pump with adjustable pump body telescopic and impeller-to-bearing spacing ratio |
| CN115199581A (en) * | 2022-07-29 | 2022-10-18 | 山东省章丘鼓风机股份有限公司 | An oil seal shaft sleeve and fan bearing box |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410243A (en) * | 2011-12-08 | 2012-04-11 | 无锡市金城泵业制造有限公司 | Anti-particle structure for turbid water pump seal |
| CN102606509A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Connection structure for PCS (Passive Containment Cooling System) recirculation pump |
| CN102606508A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Process control system (PCS) recirculation pump |
| CN102606507A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Bearing body mounting structure for PCS (Passive Containment Cooling System) recirculation pump |
| CN102889241A (en) * | 2012-03-27 | 2013-01-23 | 上海阿波罗机械股份有限公司 | Pump body for PCS (passive containment cooling system) recirculating pump |
| CN102678932A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | A double-end mechanical seal without auxiliary system |
| CN102678932B (en) * | 2012-04-27 | 2014-09-24 | 大连华阳密封股份有限公司 | A double-end mechanical seal without auxiliary system |
| CN103615407A (en) * | 2013-11-28 | 2014-03-05 | 江苏振华泵业制造有限公司 | Water cooling shaft seal structure arranged in vertical centrifugal pump |
| CN104265678A (en) * | 2014-09-26 | 2015-01-07 | 浙江理工大学 | Sealing mechanism for gap between impeller and volute |
| CN104265678B (en) * | 2014-09-26 | 2017-02-15 | 浙江理工大学 | Sealing mechanism for gap between impeller and volute |
| CN106870391A (en) * | 2017-03-13 | 2017-06-20 | 钟浪雅 | A kind of waterproof portable type water pump for surveying water velocity |
| CN107100851A (en) * | 2017-04-19 | 2017-08-29 | 陕西科技大学 | A kind of single-suction urine pump |
| CN111322268A (en) * | 2020-04-14 | 2020-06-23 | 江门市新会区龙泉污水处理有限公司 | Mechanical seal structure of slurry pump |
| CN111980954A (en) * | 2020-08-26 | 2020-11-24 | 南京工程学院 | A protection mechanism arranged at the mechanical seal of a mining high-speed emergency pump |
| CN111980954B (en) * | 2020-08-26 | 2022-02-22 | 南京工程学院 | Protection mechanism arranged at mechanical seal of mining high-speed emergency pump |
| CN113236553A (en) * | 2021-05-24 | 2021-08-10 | 大连冰山帕特技术有限公司 | Two-tooth-difference high-pressure oil pump for high-pressure screw compressor |
| CN113212134A (en) * | 2021-06-18 | 2021-08-06 | 中国第一汽车股份有限公司 | Electric drive assembly and vehicle |
| CN113212134B (en) * | 2021-06-18 | 2023-07-04 | 中国第一汽车股份有限公司 | Electric drive assembly and vehicle |
| CN114033748A (en) * | 2021-11-25 | 2022-02-11 | 安徽莱恩电泵有限公司 | Spent fuel pool cooling pump for nuclear power station |
| CN114320927A (en) * | 2021-12-02 | 2022-04-12 | 安徽莱恩电泵有限公司 | Back-flushing pump of circulating water filtering system of nuclear power station |
| CN114673731A (en) * | 2022-04-14 | 2022-06-28 | 山东齐鲁电机制造有限公司 | Vertical motor bearing leak protection oil structure |
| CN115095526A (en) * | 2022-06-16 | 2022-09-23 | 浙江南元泵业有限公司 | Horizontal centrifugal pump with adjustable pump body telescopic and impeller-to-bearing spacing ratio |
| CN115095526B (en) * | 2022-06-16 | 2025-04-18 | 浙江南元泵业有限公司 | Horizontal centrifugal pump with adjustable pump body and distance ratio between impeller and bearing |
| CN115199581A (en) * | 2022-07-29 | 2022-10-18 | 山东省章丘鼓风机股份有限公司 | An oil seal shaft sleeve and fan bearing box |
| CN115199581B (en) * | 2022-07-29 | 2025-03-25 | 山东省章丘鼓风机股份有限公司 | Oil seal sleeve and fan bearing box |
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