CN102606536B - Coolant drain tank pump for nuclear reactor - Google Patents
Coolant drain tank pump for nuclear reactor Download PDFInfo
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- CN102606536B CN102606536B CN201210083330.2A CN201210083330A CN102606536B CN 102606536 B CN102606536 B CN 102606536B CN 201210083330 A CN201210083330 A CN 201210083330A CN 102606536 B CN102606536 B CN 102606536B
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Abstract
The invention discloses a structurally compact coolant drain tank pump for a nuclear reactor, which comprises a stator component, a rotor component, a bearing component, a mechanical seal device and a mechanical seal flushing pipeline. The stator component comprises a pump cover, a pump body, a connecting pipe, a bottom plate, a support and a motor frame which are sequentially connected from bottom to top, and the rotor component comprises a pump shaft, an impeller, a locking nut and a locking bolt. A suction inlet is axially arranged on the pump cover; the pump body comprises a pressurized water chamber; an outlet opening is radially arranged on the lateral face of the pressurized water chamber; the upper end of the bottom plate is further connected with a mechanical seal cavity; a flushing water injection flow channel and a flushing water drain flow channel are arranged in the mechanical seal cavity; the bearing component comprises an upper end bearing and a lower end bearing; the upper end bearing includes a pair of angular contact ball bearings; the lower end bearing is a guide bearing; the guide bearing comprises a metal outer sleeve and a sliding bush embedded into an inner cavity of the metal outer sleeve in an interference fit manner; the sliding bush is made of engineering rubber; and the mechanical seal device is an integrated double-end-face mechanical seal device and is mounted in the mechanical seal cavity.
Description
Technical field
The present invention relates to a kind of freezing mixture drain tank pump for nuclear reactor.
Background technique
The function of reactor coolant drain tank pump (abbreviation main pump) is to make freezing mixture form forced circulation, thereby the heat energy producing in reactor is sent to steam generator, to produce steam, and driving steam turbine acting.Basic demand to it is:
1) can under unmanned maintenance condition, work safely and reliably for a long time; Be convenient to maintenance, auxiliary system is simple;
2) Runner assembly should be able to provide enough rotary inertias, so that in station blackout situation, utilizes the running down of main pump that enough flows are provided, and reactor core is obtained suitable cooling;
3) with the leakage rate of radioactive freezing mixture, to lack.
In AP1000 project, the installing space of equipment is fixed, and therefore, nuclear power plant reactor freezing mixture drain tank pump must be a kind of compact structure and function can meet the vertical pump of technical parameter requirement.
Summary of the invention
The object of the invention is in order to overcome the deficiencies in the prior art, a kind of freezing mixture drain tank pump for nuclear reactor is provided, it can reduce the axial dimension of pump greatly, makes pump group structure more compact.
The technological scheme that realizes above-mentioned purpose is: a kind of freezing mixture drain tank pump for nuclear reactor, comprise stator component, rotor part, bearing part, machine seal apparatus and machine envelope flushing line, described stator component comprises pump cover, the pump housing, connecting tube, base plate, support, the motor rack connecting successively from bottom to top, described rotor part comprises pump shaft, impeller and locking nut, wherein
Suction port on described pump cover is for axially offering;
The described pump housing comprises the bearing chamber of the pumping chamber of lower end, the closed chamber at middle part and upper end, and the lower end mouth of described pumping chamber is coaxial with suction port on described pump cover and be communicated with, and exhaust port is radially offered in the side of described pumping chamber;
The upper end of described base plate also connects a machine sealing chamber body that is positioned at described support central authorities, is provided with the injection stream of sparge water and discharges stream in this machine sealing chamber body;
The upper end of described support also connects a bearing support that is positioned at described motor rack central authorities successively;
Described rotor part also comprises lock screw, and the bottom of the outer circumferential face of described pump shaft is provided with keyway section and thread section successively, and the lower end surface of described pump shaft is also provided with a tapped blind hole coaxial with pump shaft; Described impeller is radially fixed in the keyway section of pump shaft and is arranged in the pumping chamber of the described pump housing by key, described impeller nut is threaded on the thread section of described pump shaft and impeller is axially fixed on pump shaft, described impeller nut is covering cap shape nut, and the surface central authorities of the block of impeller nut offer a through hole; Described lock screw passes the through hole of described impeller nut and is threaded connection in the tapped blind hole of described pump shaft;
Described bearing part comprises upper end bearing and bottom end bearing, and described upper end bearing is pair of horns contact ball bearing and leans against in the inner chamber that is arranged on privately described bearing support; Described bottom end bearing is a guide bearing and is arranged in the bearing chamber of the described pump housing, and this guide bearing comprises metal-coating and interference fit and be inlaid in the slide bushing in the inner chamber of metal-coating, and the material of described slide bushing is rubber industry;
Described machine encapsulation is set to unit loading type double mechanical seal and is arranged in described machine sealing chamber body;
Described machine envelope flushing line comprises that one is connected between exhaust port and the described base plate of pumping chamber of the described pump housing and the outlet pipe, parallel with described connecting tube is connected to the cleaning hose between outlet pipe and described machine sealing chamber body and is located at injection stream and the discharge stream of the sparge water in machine sealing chamber body.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, described machine seal apparatus comprises a machine envelope axle sleeve, a pair of stationary ring, a rotating seat, a pair of rotating ring and a pair of spring, described machine sealing chamber body consists of lower chamber and upper cavity, described lower chamber is fastened between the base plate inner chamber and the upper-end surface of base plate of described pump, and described upper cavity is fastened on the upper-end surface of described lower chamber; Described machine envelope axle sleeve is sleeved on by Cock screw on the pump shaft that is positioned at described machine sealing chamber, and the outer circumferential face of this machine envelope axle sleeve is the stepped shaft cylndrical surface that two diameter is little, mid diameter is large; Space between the outer circumferential face of the inner chamber of described machine sealing chamber body and described machine envelope axle sleeve forms machine sealing chamber; Described a pair of stationary ring is fixed on the bottom of described lower chamber and the top of upper cavity by locating stud respectively; Described rotating seat is fixed on described machine envelope axle sleeve by lock screw and is positioned at the middle part of described machine sealing chamber, and the longitudinal section of this rotating seat is H shape; Described a pair of rotating ring can axially movably be inlaid in respectively between two up and down and machine envelope axle sleeve of described rotating seat, so that described rotating ring rotates with described pump shaft; Described a pair of spring is separately positioned between a pair of rotating ring and described rotating seat, so that the laminating slidably all the time of the opposing side of described rotating ring and stationary ring.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, the water inlet of described injection stream is positioned at the top of the outer circumferential face of described machine sealing chamber body, and the water outlet that injects stream is positioned at the bottom of described machine sealing chamber body inner peripheral surface, and described outlet pipe is connected with the water inlet of described injection stream; The drain opening of described discharge stream is positioned at the top of the inner peripheral surface of described machine sealing chamber body, and the backwater mouth of discharging stream is positioned on the lower end surface of described machine sealing chamber body.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, the upper end of the metal-coating of described bottom end bearing, with cover plate, is provided with some mounting holes in uniform way on this cover plate.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, described freezing mixture drain tank pump is provided with the oil seal mechanism of upper end bearing, this oil seal mechanism comprises the outside framework oil seal in the Seal cage that is connected to the bearing gland of bearing support upper end and is arranged on described bearing support, the internal diameter of described bearing gland and the diameter of pump shaft are Spielpassung, and labyrinth sealing groove is set on the inner peripheral surface of bearing gland; Described outside framework oil seal comprises L shaped metal frame, rubber body and spring ring, described rubber body has ring in interior ring, outer shroud and connection and takes the shape of the letter U with diapire and the cross section of outer shroud, outer shroud and diapire are coated on the periphery of described metal frame, interior ring is sealing lip, and described spring ring is installed on the outer circumferential face of described sealing lip.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, the gap between the internal diameter of described bearing gland and the diameter of described pump shaft is 0.24～0.26mm.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, the through hole on described impeller nut is lower large little one-level shoulder hole, and the spiral shell head of described lock screw is against on the step surface of this shoulder hole.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, described cleaning hose is connected by a water outlet connection part that is fixed on described base plate upper end with described outlet pipe, and this water outlet connection part comprises that outlet port, two flanges and that are connected to the upper and lower two ends of short tube that one section of short tube, coaxial with described outlet pipe and that offer an outlet is connected to short tube outlet are connected to the blind flange in upper flanges.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, is provided with some radiated ribs in uniform way on the outer surface of described bearing support.
The above-mentioned freezing mixture drain tank pump for nuclear reactor, wherein, the quantity of described radiated rib is three to five, the thickness of described radiated rib is 8～12mm.
The technological scheme of the freezing mixture drain tank pump for nuclear reactor of the present invention, adopting liquid is the structure that axially sucks, radially discharges, and can meet the size requirement of system to freezing mixture drain tank pump.Bearing heat radiation adopts Natural Heat Convection mode, on the surface of bearing support, is provided with Natural Heat Convection fin, can guarantee Natural Heat Convection area, can also shorten the axial dimension of bearing support, makes pump structure more compact.In addition, machine envelope is rinsed and is adopted from rinsing, and adopts lower water inlet, upper water-out to rinse scheme, in the outlet of the pump housing, draws sparge water to machine envelope, can effectively play the effect of flushing, heat radiation.The axial force transmission of whole pump is steady, can effectively guarantee the safe operation of pump group.Freezing mixture drain tank pump structure for nuclear reactor of the present invention is simple, does not need to provide outside sparge water; Pump group sealability is reliable, long service life; Meet the strict demand of AP1000.
Accompanying drawing explanation
Fig. 1 is the freezing mixture drain tank pump structure schematic diagram for nuclear reactor of the present invention;
Fig. 2 is the structural representation of the freezing mixture drain tank pump rotor parts for nuclear reactor of the present invention;
Fig. 3 is the structural representation of the freezing mixture drain tank pump middle (center) bearing parts for nuclear reactor of the present invention;
Fig. 4 is the structural representation of the freezing mixture drain tank pump oil seal mechanism for nuclear reactor of the present invention;
Fig. 5 is the structural representation of the freezing mixture drain tank pump machine seal apparatus for nuclear reactor of the present invention;
Fig. 6 is the structural representation of the freezing mixture drain tank pump flushing line for nuclear reactor of the present invention.
Embodiment
In order to understand technological scheme of the present invention better, below by embodiment particularly and be described in detail by reference to the accompanying drawings:
Refer to Fig. 1, a kind of freezing mixture drain tank pump for nuclear reactor of the present invention, comprises stator component, rotor part, bearing part, oil seal mechanism, machine seal apparatus and machine envelope flushing line.
Stator component comprises pump cover 11, the pump housing 12, connecting tube 13, base plate 14, support 15, motor rack 16, machine sealing chamber body 17 and the bearing support 18 connecting successively from bottom to top, wherein:
The pump housing 12 comprises the bearing chamber of the pumping chamber of lower end, the closed chamber at middle part and upper end, and the lower end mouth of pumping chamber is coaxial with suction port 110 on pump cover 11 and be communicated with, and an exhaust port 120 is radially offered in the side of pumping chamber;
Machine sealing chamber body 17 is connected to the upper end of base plate 14 and is positioned at the central authorities of support 15, this machine sealing chamber body 17 adopts segmentation structure, by lower chamber 171 and upper cavity 172, formed, lower chamber 171 is fastened between base plate 14 inner chambers and the upper-end surface of base plate 14 of pump, the upper-end surface of lower chamber 171 is ladder surface, the lower end surface of upper cavity 172 is the ladder surface of lower chamber 171 adaptations, so that upper cavity 172 is fastened on the upper-end surface of lower chamber 171, after upper cavity 172 and lower chamber 171 engagings, be bolted on base plate 14; Between lower chamber 171 and base plate 14, be provided with O-ring seals, for preventing that dielectric leakage from arriving air side; Between upper cavity 172 and lower chamber 171, be provided with some O-ring seals, for guaranteeing their sealings between the two;
Refer to Fig. 2, rotor part comprises pump shaft 20, impeller 21, impeller nut 22 and lock screw 23 again, wherein:
The bottom of the outer circumferential face of pump shaft 20 is provided with keyway section and thread section successively, and the lower end surface of pump shaft 20 is also provided with a tapped blind hole coaxial with pump shaft 20;
Hexagonal spiral shell head screw in lock screw 23 adopts, it passes the through hole of impeller nut 22 and is threaded connection in the tapped blind hole of pump shaft 20, the spiral shell head 230 of lock screw 23 is against on the step surface of stepped shaft through hole of impeller nut 22, the spiral shell head 230 of lock screw 23 does not expose the surface of the block of impeller nut 22, can in the mobile interference of the entrance point of pump, drop to medium minimumly, can not affect hydraulic performance.
Refer to again Fig. 3, bearing part upper end bearing 31 and bottom end bearing 32, wherein:
Upper end bearing 31 is for the axial force of bear rotor parts, this upper end bearing 31 consists of pair of horns contact ball bearing, this pair of horns contact ball bearing leans against the bearing bore that is arranged on privately on pump shaft 20 and is arranged in bearing support 17, and this pair of horns contact ball bearing is fastening by locking nut 310;
Bottom end bearing 32 is for the radial force of bear rotor parts, and this bottom end bearing 32 is a guide bearing and is arranged in the bearing chamber of the pump housing 12, this bottom end bearing 32 be a guide bearing Spielpassung be arranged on axle sleeve 33; This guide bearing comprises metal-coating 321 and slide bushing 322; The material of this slide bushing 322 be rubber industry interference fit be inlaid in the inner chamber of metal-coating 321; The upper end of metal-coating 321, with cover plate, is provided with some mounting holes in uniform way on this cover plate, this guide bearing is fixed on the pump housing 12 by some screws 320.
By controlling the gap between the internal diameter of slide bushing 322 and the external diameter of axle sleeve 33; can control the amplitude that radially wobble of rotor part in the moment that starts and shut down; and then can dwindle the gap between impeller 21 and seal ring 121; reduce the wearing and tearing of seal ring 121, make seal ring 121 obtain the longer life-span and reduce the leakage rate of pumping chamber.
In bearing part of the present invention, because the slide bushing 322 of guide bearing is the WR300 rubber industry that adopts U.S. Greene Tweed company, it is made that this material is that a kind of long carbon fiber adds polyether-ether-ketone resin strengthening pressing mold to.Polyether-ether-ketone resin has added intensity, stability and the thermal diffusivity of having strengthened material after long carbon fiber, and the thermoplastic engineering plastic that has surmounted other kind, the wear resistance of slide bushing 42 is strengthened, pump is in operation can not occur seize to cause the phenomenon of pump shaft fracture, but bearing radial force well.Guide bearing also adopts Split type structure, after slide bushing 322 wearing and tearing, can be convenient for changing.Adopt a pair of angular contact ball bearing of installing back-to-back as upper end bearing, axial force that can bear rotor parts, can make the designs simplification of pump group.Because guide bearing can not bear whole radial forces sometimes, upper end bearing can also bear remaining radial force.Axle sleeve 33 also can avoid pump shaft 20 directly relative with guide bearing in addition, plays the effect of protection pump shaft 20.
The axial force of whole pump is delivered to bearing support 18 by pump shaft 20 and upper end bearing 31, finally by base plate 14, ground, is born.The transmission of power is steady.Can effectively guarantee the safe operation of pump group.
Upper end bearing 31 is also provided with oil seal mechanism, and this oil seal mechanism comprises bearing gland 33 and outside framework oil seal 34, wherein:
Refer to again Fig. 4, outside framework oil seal 34 is arranged in the oil sealing chamber of bearing support 18, this outside framework oil seal 34 comprises L shaped metal frame (not shown), rubber body 341 and spring ring 342, the material of rubber body 341 is radiotolerant ethylene propylene diene rubber, rubber body 341 has ring 343 in interior ring 343, outer shroud 344 and connection and takes the shape of the letter U with diapire and the cross section of outer shroud 344, outer shroud 344 and diapire are coated on the periphery of metal frame, interior ring 343 tilts to the inside and as sealing lip, spring ring 342 is installed on the outer circumferential face of sealing lip.
When temperature raises, lubricating grease in bearing bore can thinning one side produce axial flow and drain in machine seal apparatus, on the other hand can be because pressure overflows bearing gland 33, the tortuous roundabout gap of mazy type maze trough 341 through bearing gland 33, because multichannel is multiple, stops, reduce pressure, leakage rate is effectively suppressed, and leakage rate is minimum, has effectively guaranteed the normal use of upper end bearing 31.And external dust and other impurities will, through stopping by the multiple of labyrinth sealing groove 341 on bearing gland 33, stop dust and other impurities to enter the trend of bearing bore equally.And be arranged on outside framework oil seal 34 in the Seal cage of bearing support 18 because sealing lip is arranged to hypotenuse and is had spring ring 342 effects on sealing lip, make sealing lip can be fitted on pump shaft 20 completely, can prevent the dielectric leakage in the bearing bore of bearing support 18 and separate the outer dirt of bearing bore, dust, water and impurity are invaded.Outside framework oil seal outer layer rubber has the effect of anti-pressure and abrasion-proof, anti-oil and water most, longer service life, and the wearing and tearing of minimizing and pump shaft 20, reduce the wastage.Metal frame in this outside framework oil seal plays setting effect, makes rubber body aging for a long time, and by the metal frame arranging, slowed down the deformation time of rubber body in rubber.
Refer to Fig. 5, machine encapsulation is set to unit loading type double mechanical seal and is arranged in machine sealing chamber body 17 again; Machine seal apparatus comprises a machine envelope axle sleeve 40, a pair of stationary ring 41,42, a rotating seat 43, a pair of rotating ring 44,45 and a pair of spring 46,47, wherein:
Machine envelope axle sleeve 40 is sleeved on by Cock screw 400 on the pump shaft 20 that is positioned at machine sealing chamber body 17, and the outer circumferential face of this machine envelope axle sleeve 40 is the stepped shaft cylndrical surface that two diameter is little, mid diameter is large, can reduce like this size of mechanical seal, saves cost;
Space between the outer circumferential face of the inner chamber of machine sealing chamber body 17 and machine envelope axle sleeve 40 forms machine sealing chamber;
A pair of stationary ring 41,42 is fixed on the bottom of machine sealing chamber body 17 and the top of machine sealing chamber body 17 by locating stud 411 and O-ring seals 412 respectively;
Rotating seat 43 is fixed on machine envelope axle sleeve 40 by lock screw 430 and is positioned at the middle part of machine sealing chamber, and the longitudinal section of this rotating seat 43 is H shape;
A pair of rotating ring 44,45 can axially movably be inlaid between two up and down and machine envelope axle sleeve 40 of rotating seat 43, to rotate with pump shaft 20 by O-ring seals 423 respectively;
A pair of spring 46,47 is separately positioned between a pair of rotating ring 44,45 and rotating seat 43, so that the laminating slidably all the time of the opposing side of rotating ring 44,45 and stationary ring 41,42.
Between the bottom of machine envelope axle sleeve 40 and pump shaft 20, be provided with O-ring seals 420, for stoping medium along the clearance leakage of pump shaft 8 and mechanical seal.
The working principle of the mechanical seal of startup feed water pump of the present invention is: the leakage of sealing gas, and can adapt to dry startup, and after operation for the first time, in machine sealing chamber, being filled with medium, later startup all belongs to lubricated startup.Afterwards in pump operation process, when medium flows arrival mechanical seal from bottom to top along pump shaft 20, by 420,470 blocking-up of O type circle, in machine sealing chamber, can form to be full of and there is certain pressure fed sheet of a media, the both ends of the surface area being stressed due to rotating ring 44,45 is not etc., can form the impacting force to stationary ring 41,42, and rotating ring 44,45 makes between rotating ring 44,45 and stationary ring 41,42 the opposing side appropriateness laminating forming by spring 46,47, thereby make to maintain between this faying surface the object that one deck liquid film as thin as a wafer reaches sealing.
Refer to Fig. 6, machine seals flushing line and comprises outlet pipe 51, cleaning hose 52 and be located at the injection stream 53 of the sparge water in machine sealing chamber body 17 and discharge stream 54 again, wherein:
One end of cleaning hose 52 is connected with the outlet pipe 51 on base plate 14 by flange, and the other end is connected with the water inlet 531 of the injection stream 53 of machine sealing chamber body 17;
The water inlet 531 that injects stream 53 is positioned at the top of the outer circumferential face of machine sealing chamber body 17, and the water outlet 532 that injects stream 53 is positioned at the bottom of machine sealing chamber body 17 inner peripheral surfaces;
The drain opening 541 of discharging stream 54 is positioned at the top of the inner peripheral surface of machine sealing chamber body 17, and the backwater mouth 542 of discharging stream 54 is positioned on the lower end surface of machine sealing chamber body 17.
Machine seal apparatus of the present invention adopts PLAN11 from flushing scheme, from the exhaust port 120 introduction machine envelope sparge waters of pump, and in the following water inlet of machine sealing chamber body 17, top water outlet, this can make machine seal apparatus obtain rinsing fully and be cooling.The medium temperature of carrying due to this pump is in addition 10 ℃～121.1 ℃, and the cleaning hose 52 in flushing line adopts fin tube, can effectively increase heat diffusion area.Backwater mouth 542 is positioned on the lower end surface of machine sealing chamber body 17 and can be communicated with connecting tube 13, and sparge water is flowed back in jar, efficiently solves the sealing difficulty of bringing because of external flushing line.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and not as limitation of the invention, as long as within the scope of connotation of the present invention, to the above embodiment's variation, modification, all will drop within the scope of claims of the present invention.
Claims (8)
1. the freezing mixture drain tank pump for nuclear reactor, comprise stator component, rotor part, bearing part, machine seal apparatus and machine envelope flushing line, described stator component comprises pump cover, the pump housing, connecting tube, base plate, support, the motor rack connecting successively from bottom to top, described rotor part comprises pump shaft, impeller and locking nut, it is characterized in that
Suction port on described pump cover is for axially offering;
The described pump housing comprises the bearing chamber of the pumping chamber of lower end, the closed chamber at middle part and upper end, and the lower end mouth of described pumping chamber is coaxial with suction port on described pump cover and be communicated with, and exhaust port is radially offered in the side of described pumping chamber;
The upper end of described base plate also connects a machine sealing chamber body that is positioned at described support central authorities, is provided with the injection stream of sparge water and discharges stream in this machine sealing chamber body;
The upper end of described support also connects a bearing support that is positioned at described motor rack central authorities successively;
Described rotor part also comprises lock screw, and the bottom of the outer circumferential face of described pump shaft is provided with keyway section and thread section successively, and the lower end surface of described pump shaft is also provided with a tapped blind hole coaxial with pump shaft; Described impeller is radially fixed in the keyway section of pump shaft and is arranged in the pumping chamber of the described pump housing by key, described impeller nut is threaded on the thread section of described pump shaft and impeller is axially fixed on pump shaft, described impeller nut is covering cap shape nut, and the surface central authorities of the block of impeller nut offer a through hole; Described lock screw passes the through hole of described impeller nut and is threaded connection in the tapped blind hole of described pump shaft;
Described bearing part comprises upper end bearing and bottom end bearing, and described upper end bearing is pair of horns contact ball bearing and leans against in the inner chamber that is arranged on privately described bearing support; Described bottom end bearing is a guide bearing and is arranged in the bearing chamber of the described pump housing, and this guide bearing comprises metal-coating and interference fit and be inlaid in the slide bushing in the inner chamber of metal-coating, and the material of described slide bushing is rubber industry;
Described machine encapsulation is set to unit loading type double mechanical seal and is arranged in described machine sealing chamber body;
Described machine envelope flushing line comprises that one is connected between exhaust port and the described base plate of pumping chamber of the described pump housing and the outlet pipe, parallel with described connecting tube is connected to the cleaning hose between outlet pipe and described machine sealing chamber body and is located at injection stream and the discharge stream of the sparge water in machine sealing chamber body
Described machine seal apparatus comprises a machine envelope axle sleeve, a pair of stationary ring, a rotating seat, a pair of rotating ring and a pair of spring,
Described machine sealing chamber body consists of lower chamber and upper cavity, and described lower chamber is fastened between the base plate inner chamber and the upper-end surface of base plate of described pump, and described upper cavity is fastened on the upper-end surface of described lower chamber;
Described machine envelope axle sleeve is sleeved on by Cock screw on the pump shaft that is positioned at described machine sealing chamber body, and the outer circumferential face of this machine envelope axle sleeve is the stepped shaft cylndrical surface that two diameter is little, mid diameter is large;
Space between the outer circumferential face of the inner chamber of described machine sealing chamber body and described machine envelope axle sleeve forms machine sealing chamber;
Described a pair of stationary ring is fixed on the bottom of described lower chamber and the top of upper cavity by locating stud respectively;
Described rotating seat is fixed on described machine envelope axle sleeve by lock screw and is positioned at the middle part of described machine sealing chamber, and the longitudinal section of this rotating seat is H shape;
Described a pair of rotating ring can axially movably be inlaid in respectively between two up and down and machine envelope axle sleeve of described rotating seat, so that described rotating ring rotates with described pump shaft;
Described a pair of spring is separately positioned between a pair of rotating ring and described rotating seat, so that the laminating slidably all the time of the opposing side of described rotating ring and stationary ring,
Described freezing mixture drain tank pump is provided with the oil seal mechanism of upper end bearing, and this oil seal mechanism comprises the outside framework oil seal in the Seal cage that is connected to the bearing gland of bearing support upper end and is arranged on described bearing support,
The internal diameter of described bearing gland and the diameter of pump shaft are Spielpassung, and labyrinth sealing groove is set on the inner peripheral surface of bearing gland;
Described outside framework oil seal comprises L shaped metal frame, rubber body and spring ring, described rubber body has ring in interior ring, outer shroud and connection and takes the shape of the letter U with diapire and the cross section of outer shroud, outer shroud and diapire are coated on the periphery of described metal frame, interior ring is sealing lip, and described spring ring is installed on the outer circumferential face of described sealing lip.
2. the freezing mixture drain tank pump for nuclear reactor according to claim 1, it is characterized in that, the water inlet of described injection stream is positioned at the top of the outer circumferential face of described machine sealing chamber body, the water outlet that injects stream is positioned at the bottom of described machine sealing chamber body inner peripheral surface, and described outlet pipe is connected with the water inlet of described injection stream; The drain opening of described discharge stream is positioned at the top of the inner peripheral surface of described machine sealing chamber body, and the backwater mouth of discharging stream is positioned on the lower end surface of described machine sealing chamber body.
3. the freezing mixture drain tank pump for nuclear reactor according to claim 1, is characterized in that, the upper end of the metal-coating of described bottom end bearing, with cover plate, is provided with some mounting holes in uniform way on this cover plate.
4. the freezing mixture drain tank pump for nuclear reactor according to claim 1, is characterized in that, the gap between the internal diameter of described bearing gland and the diameter of described pump shaft is 0.24～0.26mm.
5. the freezing mixture drain tank pump for nuclear reactor according to claim 1, is characterized in that, the through hole on described impeller nut is lower large little one-level shoulder hole, and the spiral shell head of described lock screw is against on the step surface of this shoulder hole.
6. the freezing mixture drain tank pump for nuclear reactor according to claim 1, it is characterized in that, described cleaning hose is connected by a water outlet connection part that is fixed on described base plate upper end with described outlet pipe, and this water outlet connection part comprises that outlet port, two flanges and that are connected to the upper and lower two ends of short tube that one section of short tube, coaxial with described outlet pipe and that offer an outlet is connected to short tube outlet are connected to the blind flange in upper flanges.
7. the freezing mixture drain tank pump for nuclear reactor according to claim 1, is characterized in that, is provided with in uniform way some radiated ribs on the outer surface of described bearing support.
8. the freezing mixture drain tank pump for nuclear reactor according to claim 7, is characterized in that, the quantity of described radiated rib is three to five, and the thickness of described radiated rib is 8～12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210083330.2A CN102606536B (en) | 2012-03-27 | 2012-03-27 | Coolant drain tank pump for nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210083330.2A CN102606536B (en) | 2012-03-27 | 2012-03-27 | Coolant drain tank pump for nuclear reactor |
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| CN102606536A CN102606536A (en) | 2012-07-25 |
| CN102606536B true CN102606536B (en) | 2014-04-09 |
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| CN201210083330.2A Active CN102606536B (en) | 2012-03-27 | 2012-03-27 | Coolant drain tank pump for nuclear reactor |
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| CN103671229A (en) * | 2013-12-09 | 2014-03-26 | 无锡艾比德泵业有限公司 | Centrifugal pump with improved mechanical seal cooling structure |
| CN103727072B (en) * | 2013-12-31 | 2016-04-06 | 江苏大学 | A kind of transh pump machine envelope is rinsed and bearing cooler |
| CN106762703A (en) * | 2016-12-29 | 2017-05-31 | 镇江福泰克流体技术有限公司 | A kind of upright type liquid discharge centrifugal pump |
| CN108799145B (en) * | 2018-07-11 | 2024-03-19 | 合肥凯泉电机电泵有限公司 | High-efficiency mixed flow pump with self-cooling submersible motor |
| CN109968239B (en) * | 2019-03-21 | 2020-07-14 | 哈尔滨电气动力装备有限公司 | Process method for preparing size of centering block of main pump of bearing seal of nuclear power station |
| CN110145469B (en) * | 2019-06-05 | 2024-06-18 | 广州市昕恒泵业制造有限公司 | Environment-friendly reliable pump for water treatment system |
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| CN202149121U (en) * | 2011-06-14 | 2012-02-22 | 上海连成（集团）有限公司 | Improvement of novel impeller nut |
| CN202597255U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Coolant drain tank pump used for nuclear reactor |
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| DE10307498A1 (en) * | 2003-02-21 | 2004-09-02 | Ksb Aktiengesellschaft | Vibration-optimized tubular casing pump |
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| CN202149121U (en) * | 2011-06-14 | 2012-02-22 | 上海连成（集团）有限公司 | Improvement of novel impeller nut |
| CN202140334U (en) * | 2011-06-21 | 2012-02-08 | 烟台恒邦集团有限公司泵业分公司 | Double-end-face sealing device for submerged pump |
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| CN102606536A (en) | 2012-07-25 |
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