CN206175247U - A starting feed water pump group for nuclear power station - Google Patents
A starting feed water pump group for nuclear power station Download PDFInfo
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- CN206175247U CN206175247U CN201621090509.0U CN201621090509U CN206175247U CN 206175247 U CN206175247 U CN 206175247U CN 201621090509 U CN201621090509 U CN 201621090509U CN 206175247 U CN206175247 U CN 206175247U
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Abstract
The utility model discloses a starting feed water pump group for nuclear power station, include the base and be located the motor of base top surface, the axial both ends of motor respectively are equipped with a starting feed water pump rather than actuating shaft connection starting feed water pump includes stator section spare and rotor part, stator section spare divide into lower pump body and last pump cover along its horizontal flange, lower pump body with go up the pump cover through how fixed as an organic whole to stator press the sealing circle and stator clamp bolt, the rotor part includes the pump shaft, the pump shaft along the horizontal flange of stator section spare runs through stator section spare. The drive end of pump shaft pass through diaphragm formula shaft coupling with the drive end of motor links to each other. Its technological effect is: its quantity that can be effectively less goes up between pump cover and the lower pump body stator press the sealing circle and stator clamp bolt, starting feed water pump's dismouting is more convenient with the maintenance to the axial force that can fully disperse the pump shaft to receive reduces the vibration of pump shaft, effectively protects the drive shaft of motor.
Description
Technical field
This utility model is related to a kind of startup feedwater pump group for nuclear power station in nuclear power equipment field.
Background technology
It is the important pump group in nuclear power station to start feedwater pump group, and its Main Function in nuclear power station is:
Reserve feed is provided in booster pump/main feed pump or its associated lines when failing：The relatively small startup of flow is given
Water pump supplements water during shutdown to steam generator, and water carries out chemical tune in power plant's initial start stage stage is to main feed water circuit
It is whole.Start and be under feed pump nominal situation resting state, and it is low in main feedwater flow and steam generator water level reaches setting
Automatic during value.
Start feed pump and its associated lines possess the depth defense function of performing Decay heat removal system:To prevent passive peace
Total correlation decay heat removal system, starts feed pump when losing main feedwater and/or losing normal communication power supply, to steam generation
Device provides the decay heat for starting feedwater to discharge RCS.
In addition to depth defense function, starting feed pump should have under power plant's accidental conditions to steam generator offer
Start the ability of feedwater.
These accidental conditions include certain that stand-by heat, power plant's startup, low power run, and RNS do not come into operation
A little shutdown stages.
At present, the major defect of the startup feedwater pump group of used in nuclear power station is that the group maintenance dismounting of startup feed pump is constant, while
Starting the axial force of the pump shaft of feed pump cannot disperse, and this can even affect the drive shaft for causing motor.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of startup for nuclear power station is fed water
Pump group, its easy accessibility is easy to safeguard, and the axial force that the fully dispersed pump shaft of energy is subject to, and reduces the vibration of pump shaft, and effectively protects
The drive shaft of shield motor.
Realizing a kind of technical scheme of above-mentioned purpose is：A kind of startup for nuclear power station is fed water pump group, including base with
And positioned at the motor of the base top surface, the axial direction of the motor is respectively arranged at the two ends with a startup feedwater being connected with its drive shaft
Pump, it is characterised in that：
The startup feed pump includes stator component and rotor part；
The stator component is divided into lower pump body and upper pump cover, the lower pump body and the upper pump cover along its horizontal flange
Sealing ring is compressed by multipair stator and stator hold-down bolt is fixed as one；
The rotor part includes pump shaft, and the drive end of the pump shaft passes through the driving of diaphragm type coupler and the motor
End is connected；
The lower pump body and the upper pump cover surround the first order in the stator component to the 9th grade of pumping chamber, and
One-level sets gradually from drive end to level V pumping chamber along the axial direction of the pump shaft to free end, the 6th grade to the 9th grade
Pumping chamber sets gradually from free end along the axial direction of pump shaft to drive end；
It is additionally provided with lower pump body just to the suction flange of first order pumping chamber, and just to the outlet method of the 9th grade of pumping chamber
It is blue；
The bottom of the bottom of first order pumping chamber and the 6th grade of pumping chamber is connected by balancing pipeline；
The rotor part also includes the first order being socketed on the pump shaft to the 9th grade of impeller, middle axle sleeve, freedom
End axle sleeve and sleeve nut；
The first order to the 9th grade of impeller is located at correspondingly first order pumping chamber to the 9th grade of pumping chamber, and the first order is extremely
Point to the drive end of pump shaft described in the import of level V impeller, the import of the 6th grade to the 9th grade impeller point to the pump shaft from
By holding；
The intermediate seal axle sleeve is socketed between the level V impeller and the 9th grade of impeller with the pump shaft；
The free end shaft is enclosed within the 6th grade and is socketed with the pump shaft between impeller and the sleeve nut and by socket
Sleeve nut on the pump shaft is fixed on the pump shaft.
Further, the diaphragm type coupler includes the pump end shaft coupling being connected with the pump shaft, intermediate shaft coupling with
And the motor side shaft coupling being connected with the drive shaft of the motor, pump end shaft coupling, the intermediate shaft coupling and the electricity
Generator terminal shaft coupling is sequentially connected, between pump end shaft coupling and the intermediate shaft coupling, and the motor side shaft coupling with
Vibration damping diaphragm is equipped between the intermediate shaft coupling.
Further, the axial two ends of the stator component are equipped with the mechanical seal with pump shaft socket,
The mechanical seal includes machine sealed cover, machine envelope connection ring, machine envelope axle sleeve, stationary ring, spring base, rotating seat, rotating ring
And some springs；
The machine envelope connection ring is socketed on the pump shaft, and is fixed with the stator component, the machine sealed cover socket
Coaxially fix on the pump shaft and with machine envelope connection ring, between the machine envelope connection ring and the machine sealed cover machine is formed
Envelope chamber；The machine sealed cover is provided with the injection runner connected with the machine sealing chamber；
The machine is sealed on the fixedly sleeved pump shaft of axle sleeve, and one end of the machine envelope axle sleeve is located in the machine sealing chamber, separately
The machine sealing chamber is stretched out in outer one end from the radially inner side of the machine sealed cover, and is fixed with the pump shaft by lock-screw；
The stationary ring is fixed on the machine sealed cover towards on the inner peripheral surface of one end of the machine sealing chamber；
The spring socket sleeve is connected on the radial outside that the machine envelope axle sleeve is located at one end in the machine sealing chamber, the spring base
The end face for sealing connection ring one end back to the machine is disposed with the axially in parallel annular groove with pump shaft, around the annular groove
Bottom surface circumference, be evenly equipped with it is some axially in parallel with the pump shaft, for installing the spring eye of the spring；
The rotating seat is connected in the annular groove of the spring base with the spring, and can be along the annular groove
Axial horizontal sliding, the rotating seat is a L-shaped ring；The inner peripheral wall of the outer circle wall of the rotating seat and the spring base it
Between formed rotating ring groove；
The inner peripheral wall of the rotating ring is axially displaceably socketed in the middle part that the machine seals axle sleeve, and the rotating ring is towards institute
In the embedded described rotating ring groove of the one end for stating spring；
The rotating ring and the stationary ring forced contact.
Further, the machine sealed cover is provided with and machine envelope axle sleeve socket back to the radially inner side of machine sealing chamber one end
Restrictor ring, the restrictor ring fixed by baffle plate and locating piece with the machine sealed cover.
Further, the machine sealed cover is provided with the injection runner connected with the machine sealing chamber；It is described for nuclear power
The startup feedwater pump group stood also includes flushing line, and the flushing line includes being located at the total flush pipe above the upper pump cover
Road, by two flushing introduction pipelines of total flushing line connection corresponding with the injection runner of two mechanical seals, will
Total flushing line connect with first pumping chamber first flushing draw pipeline, by total flushing line with it is described on
Pipeline is drawn in second flushing of the transition runner connection in pump cover；The last time water pipe that total flush pipe is connected with the base
Road, and the water lines next time that the plug on the lower pump body is connected with the base.
Further, connected by three-way valve between the flushing introduction pipeline and total flushing line.
Further, the last time water lines are provided with stop valve connection.
Further, the drive end socket drive end bearing part of the pump shaft, the free end socket of the pump shaft is freely
End bearing part；
The drive end bearing part includes gland before drive end bearing body, drive end, drive end rear pressing cover, drive end circle
Post roller bearing and drive end disc；
The drive end bearing body includes being located at the drive end bearing chamber of the pump shaft radial outside and positioned at the driving
End bearing chamber bottom and the drive end oil sump connected with drive end bearing chamber；
Gland and the drive end rear pressing cover are socketed on the pump shaft and by the drive end bearing before the drive end
Close in chamber；An interstage sleeve is set respectively on the medial surface of gland and the drive end rear pressing cover before the drive end, with the drive end
The corresponding interstage sleeve of rear pressing cover opens up drive end fuel feed hole,
The drive end cylinder roller bearing is socketed in the drive end bearing intracavity and the pump shaft, the drive end circle
The inner periphery of post roller bearing is by the first drive end axle sleeve and the second drive end axle sleeve axially position, the drive end disc
It is suspended on first drive end axle to put and fix with the first drive end bearing body, the bottom of the drive end disc
In being immersed in the drive end oil sump；
The free end parts of bearings includes gland, free end rear pressing cover, free end before free end bearing body and free end
Cylinder roller bearing, angular contact ball bearing to, bearing box body, the bearing lid for being connected to the bearing box body two ends and two from
By end disc；
The free end bearing body includes holding chamber with pump shaft socket free end shaft, and positioned at the free end bearing
Chamber bottom, and the free end oil sump connected with the free end bearing bore；
Gland and the free end rear pressing cover are socketed on the pump shaft and by the free end bearing before the free end
Close in chamber；An interstage sleeve is set respectively on the medial surface of gland and the free end rear pressing cover before the free end, after the free end
The corresponding interstage sleeve of gland opens up free end fuel feed hole；
The free end cylindrical roller is in the free end bearing bore anterior socket, the cylindrical roller axle with the pump shaft
The inner periphery for holding is by the first free end axle sleeve and the second free end axle sleeve axially position；
The angular contact ball bearing is pointed to the bearing box body, and in the free end bearing bore rear portion and the pump
Axle is socketed, and the inner periphery of the angular contact ball bearing pair is with the 3rd free end axle sleeve interference fit being socketed on the pump shaft simultaneously
By the head of the 3rd free end axle sleeve and the axis head nut axially position for being socketed in the pump shaft free end；
Two free end discs are suspended on the axis head nut respectively and second free end shaft puts, two
The bottom of the free end disc is immersed in the free end oil sump.
Further, the lateral surface of gland, the drive end axle bearing portion before the drive end of the drive end bearing part
Before the free end of the lateral surface of the drive end rear pressing cover of part and the free end parts of bearings lateral surface of gland be equipped with
The dust pan that the pump shaft is fixed by socket.
Further, the drive end bearing body be provided with the drive end oil level indicator that connects with the drive end oil sump and
Drive end lubricating oil temperature meter, the free end bearing body is provided with the free end oil level connected with the free end oil sump
Meter and free end lubricating oil temperature meter.
Employ it is of the present utility model it is a kind of for nuclear power station startup feedwater pump group technical scheme, including base and
Positioned at the motor of the base top surface, the axial direction of the motor is respectively arranged at the two ends with a startup feed pump being connected with its drive shaft
The startup feed pump includes stator component and rotor part；The stator component along its horizontal flange be divided into lower pump body and
Upper pump cover, the lower pump body and the upper pump cover compress sealing ring by multipair stator and stator hold-down bolt is fixed as one；
The rotor part includes pump shaft, and the pump shaft runs through the stator component along the horizontal flange of the stator component.Institute
The drive end for stating pump shaft is connected by diaphragm type coupler with the drive end of the motor.It has the technical effect that：It can effectively compared with
The quantity that stator between pump cover and lower pump body compresses sealing ring and stator hold-down bolt is gone up less, starts the dismounting and maintenance of feed pump
It is convenient, and the axial force that the fully dispersed pump shaft of energy is subject to, reduce the vibration of pump shaft, the drive shaft of effective protection motor.
Description of the drawings
Fig. 1 is a kind of front view of startup feedwater pump group for nuclear power station of the present utility model.
Fig. 2 is a kind of top view of startup feedwater pump group for nuclear power station of the present utility model.
Fig. 3 is the profile for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model.
Fig. 4 is the right view for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model.
Fig. 5 is a kind of left view of startup feedwater pump group for nuclear power station of the present utility model.
Fig. 6 is the rotor part for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model
Front view.
Fig. 7 is the mechanical seal for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model
Front view.
Fig. 8 is the free end bearing for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model
Front view.
Fig. 9 is the master of the drive end for starting feed pump in a kind of startup feedwater pump group for nuclear power station of the present utility model
View.
Specific embodiment
Refer to Fig. 1, inventor of the present utility model is in order to be able to preferably managing the technical solution of the utility model
Solution, below by specifically embodiment, and combines accompanying drawing and is described in detail：
Refer to Fig. 1, a kind of startup feedwater pump group of the present utility model, including two startup feed pumps, base 91 and electricity
Machine 92, motor 92 is located on the top surface of base 91, and two startup feed pumps correspond to be located at the axial two ends of motor 92, and and motor
92 drive shaft connection.
Wherein, starting feed pump includes stator component 2, rotor part 1, drive end bearing part 3, free end parts of bearings
4 and two sets of mechanical seals 5, wherein rotor part 1 includes pump shaft 11, the drive that pump shaft 11 passes through diaphragm type coupler 93 and motor 92
Moving axis is connected.
Stator component 2 is divided into lower pump body 21 and upper pump cover 22 along its horizontal flange, lower pump body 21 and upper pump cover 22 it
Between compress sealing ring 25 and stator hold-down bolt 26 by multiple stators and be fixed as one.Compress sealing ring 25 and adopt BMC9200
Material, and with ANSYS analysis levels split and the structure of stator hold-down bolt 26, it is ensured that the sealing of stator component 2.
Pump shaft 11 runs through stator component 2 along the horizontal flange.
Lower pump body 21 and upper pump cover 22 surround the first order in stator component 2 to the 9th grade of pumping chamber 201~209,
The first order sets gradually from drive end to level V pumping chamber 201~205 along the axial direction of pump shaft 11 to free end, is low pressure
Area.6th grade to the 9th grade pumping chamber 206~209 sets gradually from free end along the axial direction of pump shaft 11 to drive end.For height
Nip.Wherein the first order to the 8th grade of pumping chamber 201~208 is volute casing, and the 9th grade of pumping chamber 209 is spiral pressurized water chamber.
In order that the radial force of stator component 2 balance, outlet and the 6th grade of pumping chamber 206 of level V pumping chamber 205
Pump cover 22 is symmetrically arranged between import by two to connect with the transition runner 23 in lower pump body 21.
Lower pump body 21 is provided with just to the suction flange 211 of first order pumping chamber 201, the positive para-position of the 9th grade of pumping chamber 209
Outlet(discharge) flange 212 on lower pump body 21.
The bottom of first order pumping chamber 201 and the 6th grade of pumping chamber 206 is connected by balancing pipeline 24.
Suction flange 211 and water-supplying chamber's outlet(discharge) flange 212 are arranged on lower pump body 21 in due to stator component 2,
As long as therefore upper pump cover 22 is opened, it becomes possible to rotor part 1 is overhauled, it is not necessary to detaching pipelines, while stator component 2
Hydraulic performance is excellent, radial force being capable of autobalance.
Rotor part 1 also includes the first order being socketed on pump shaft 11 to the 9th grade of impeller 121~129 except pump shaft 11,
Middle axle sleeve 13, free end axle sleeve 14 and sleeve nut 15.
The first order to the 9th grade of impeller 121~129 is single suction, double shrouded wheel, and is located at first order pressure correspondingly
Hydroecium is to the 9th grade of pumping chamber 201~209.The driving of pump shaft 11 is pointed in the import of the first order to level V impeller 121~125
End, the 6th grade of import to the 9th grade of impeller 126~129 is directed to the free end of pump shaft 11.The rear-wheel hub of first order impeller 121
External diameter second to the 9th grade of impeller 122~129 rear-wheel hub external diameter it is identical；Prosopyle on the front hub of first order impeller 121
External diameter of the external diameter of ring more than the preoral loop of the front hub of second to the 9th grade of impeller 122~129.
Intermediate seal axle sleeve 13 is socketed between level V impeller 125 and the 9th grade of impeller 129 with pump shaft 11, and by passing
Dynamic key is fixed with pump shaft 11.
Free end axle sleeve 14 is socketed and by being socketed in pump shaft between impeller and sleeve nut 15 at the 6th grade with pump shaft 11
Sleeve nut 15 on 11 is fixed on pump shaft 11, is threadedly coupled between free end axle sleeve 14 and sleeve nut 15.
Because the second level of low-pressure area is to level V impeller 122~125 and the 6th grade to the 9th grade impeller 126 of higher-pressure region
~129 is back-to-back arrangement, and overall dimensions are identical, so the axial force automatic balancing of eight grades of impellers, and first order leaf
The axial force direction that wheel 121 is produced points to the drive end of pump shaft 11, and the external diameter of free end axle sleeve 14 is more than before all impellers
The external diameter of choma, and the first order of the pressure of free end axle sleeve 14 and the 6th grade of connecting side of impeller 126 and low-pressure area is to the 5th
The lift of level impeller 121~125 is equal, and due to free end axle sleeve 14 and the 6th grade of junction of impeller 126 and suction flange 211
Connected by balancing pipeline 23, therefore the pressure of free end axle sleeve 14 and the 6th grade of connecting side of impeller 126 is suction flange 211
Pressure, so free end axle sleeve 14 will produce the axial force for pointing to the free end of pump shaft 11, using produced by free end axle sleeve 14
Axial force come balance first order impeller 121 generation axial force.The rotational efficienty of pump shaft 11 has guarantee, starts feed pump
Service life effectively extends.
First order impeller has high cavitation resistance.
Simultaneously the drive end of pump shaft 11 is taper and is connected with the drive shaft of motor 92 by diaphragm type coupler 93.Diaphragm
Formula shaft coupling includes the pump end shaft coupling 931 being connected with pump shaft 11, intermediate shaft coupling 932 and is connected with the drive shaft of motor 92
Motor side shaft coupling 933, pump end shaft coupling 931, intermediate shaft coupling 932 and motor side shaft coupling 933 be sequentially connected, pump end
Between shaft coupling 931 and intermediate shaft coupling 932, and vibration damping is equipped between motor side shaft coupling 933 and intermediate shaft coupling 932
Diaphragm, above-mentioned design is effectively reduced vibration when this pump shaft 11 rotates, so as to reduce between upper pump cover 22 and lower pump body 21
Stator compresses the quantity of sealing ring 25 and stator hold-down bolt 26, makes the maintenance of startup feed pump convenient, is also beneficial to inhale
Receive the axial force that drive end is pointed in pump shaft 11, and the drive shaft of effective protection motor 92
Above-mentioned design can ensure that this for the service life that feedwater pump group has more than 60 years that starts of nuclear power station, and
Possesses the ability being applied in CAP1400 nuclear reaction heap-type.
Two sets of mechanical seals 5 are sealed respectively positioned at the both sides of stator component 2, including machine sealed cover 51, machine envelope connection ring 52, machine
Axle sleeve 53, stationary ring 54, spring base 55, rotating seat 56, rotating ring 57, some springs 58 and restrictor ring 59.
Wherein machine envelope connection ring 52 is socketed on pump shaft 11, and is fixed with stator component 2, and machine sealed cover 51 is socketed in pump shaft
It is on 11 and coaxial fixed with machine envelope connection ring 52, form machine sealing chamber, machine sealed cover between machine envelope connection ring 52 and machine sealed cover 51
51 are provided with one is used to that flushing liquor to be injected the injection runner (not shown) of machine sealing chamber.
Machine envelope axle sleeve 53 passes through on the fixedly sleeved pump shaft 11 of O-ring, and one end of machine envelope axle sleeve 53 is located in the machine sealing chamber,
The radially inner side of the other end slave sealed cover 51 of machine envelope axle sleeve 53 is stretched out outside the machine sealing chamber.
Stationary ring 54 be inlaid on the inner peripheral surface towards one end of machine sealing chamber of machine sealed cover 51 and by alignment pin 541 with
The axial restraint of machine sealed cover 51, it is radially fixed by O-ring 540 between stationary ring 54 and machine sealed cover 51.
Spring base 55 seals the outer circumference surface that axle sleeve 53 is located at one end in machine sealing chamber by the way that limit screw 551 is fixedly sleeved in machine
On.The end face for sealing the one end of connection ring 52 back to machine of spring base 55 is disposed with the annular groove axially in parallel with pump shaft 11, surrounds
The circumference of the bottom surface of the annular groove, be evenly equipped with it is some axially in parallel with pump shaft 11, for installing the spring eye of spring 58, institute
The spring 58 stated in spring eye is in compressive state.
Rotating seat 56 is connected in the annular groove of spring base 55 with spring 58, and can be along the axial water of the annular groove
Smooth to move, rotating seat 56 is a L-shaped ring.The inner peripheral wall of rotating seat 56 is close to machine envelope axle sleeve 53, the outer circle wall of rotating seat 56
Rotating ring groove is formed and the radial direction of the inner peripheral wall of spring base 55 between.
The inner peripheral wall of rotating ring 57 is axially displaceably socketed in the middle part that machine seals axle sleeve 53, rotating ring 57 by O-ring 570
Rotating ring is formed towards between the embedded outer circle wall of rotating seat 56 of end face and the inner peripheral wall radial direction of spring base 55 of the one end of spring 58
In groove, so that rotating ring 57 rotates with pump shaft 11.Another end face of rotating ring 57 and the forced contact of stationary ring 54.
Restrictor ring 59 is socketed in the radially inner side back to machine sealing chamber one end of machine sealed cover 51 with machine envelope axle sleeve 53, restrictor ring
59 are fixed by baffle plate 591 and locating piece 592 with machine sealed cover 51.
Impeller also produces powerful absorption affinity when starting feedwater pump startup, and the machine sealing chamber can be prevented the water quilt in machine sealing chamber
Impeller siphons away and pressure vacuum occurs so that rotating ring 57 and stationary ring 54 are in dry condition, the life-span of prolonged mechanical sealing 5,
The machine sealing chamber ensure that the pressure of machine sealing chamber and mechanical seal prevent the aggregation of heat, make the use longevity of mechanical seal 5
Order big more than 15000 hours.
The operation principle of mechanical seal 5 is：In the operation process of pump shaft 11, in machine connection ring 52 and the structure of machine sealed cover 51 are sealed
Into machine sealing chamber in can be formed full of have certain pressure pumped (conveying) medium, because rotating ring 57 is towards the pressure of one end end face of stationary ring 54
More than its towards one end end face of spring 58 pressure, when rotating ring 57 is contacted with stationary ring 54, spring 58 make rotating ring 57 and stationary ring 54 it
Between form forced contact, and the forced contact face between rotating ring 57 and stationary ring 54 maintains one layer of very thin liquid film close so as to reach
The purpose of envelope.After forced contact failure between rotating ring 57 and stationary ring 54, restrictor ring 59 prevents the amount of leakage of medium, and not shadow
Ring the normal operation of pump group.
The backwashing manner of mechanical seal of the present utility model is from backwashing manner:
Flushing line 50 includes being located at total flushing line 501 of the top of upper pump cover 22, by total flushing line 50 and two machines
Two flushing introduction pipelines 502 of the injection runner correspondence connection of tool sealing 5, by the pumping chamber 201 of total flushing line 501 and first
Pipeline 503 is drawn in first flushing of connection, the second punching that total flushing line 501 is connected with the transition runner 23 in upper pump cover 22
Wash extraction pipeline 504；The last time water lines 505 that total flush pipe 501 is connected with base 91, and by the plug on lower pump body 21
Water lines 506 next time connected with base 91.
Rinse and connected by three-way valve 507 between introduction pipeline 502 and total flushing line 501.
Last time water lines 505 are provided with stop valve 508.
Total flushing line 501 is drawn flushing liquor and will be rushed respectively from the discharge opening of the first order pumping chamber 201 of stator component 2
The injection runner of machine sealed cover 51 that washing liquid is injected in two sets of mechanical seals 5, introduces flushing water and mechanical seal 5 is rinsed, no
Need external cooling water.
Meanwhile, machine envelope axle sleeve 53 stretches out one end of machine sealing chamber to be fixed with some lock-screws 531 for sealing axle sleeve 53 around machine,
The purpose of above-mentioned design is：Prevent machine envelope axle sleeve 53 from loosening during the rotation of pump shaft 11, it is ensured that rotating ring 57 and stationary ring 54
Between forced contact do not fail, the service life for making mechanical seal 5 reaches more than 15000 hours, it is ensured that start feedwater pump group
Can be applied in CAP1400 nuclear reaction heap-type.
Drive end bearing part 3 is socketed in gland before the drive end of pump shaft 11, including drive end bearing body 32, drive end
33rd, dust pan 371 and drive before drive end rear pressing cover 34, drive end cylinder roller bearing 35, drive end disc 36 and drive end
Dust pan 372 behind moved end, wherein：
Drive end bearing body 32 includes being located at the drive end bearing chamber 321 of the radial outside of pump shaft 11 and positioned at drive end bearing
The bottom of chamber 321, and the drive end oil sump 322 connected with drive end bearing chamber 321.
Before drive end gland 33, drive end rear pressing cover 34 be socketed on pump shaft 11 and with the top of drive end bearing body 32
Front and back ends correspondence is fixed, and the front and back end in drive end bearing chamber 321 is closed, before drive end gland 33, drive end rear pressing cover 34 with
Arrange on the contact surface of drive end bearing body 32 and be correspondingly provided with O-ring seals.Gland 33 before drive end, drive end rear pressing cover 34
Be correspondingly provided with before drive end oil collecting ring 341 after oil collecting ring 331 and drive end on inner circumferential disc, and with drive end before oil collecting ring
331 and drive end after spill port 342 after spill port 332 and drive end before the corresponding drive end of oil collecting ring 341.Gland before drive end
33rd, a scrobicular ring is opened up on the lateral surface of drive end rear pressing cover 34, the interstage sleeve of convex is equipped with medial surface.
With a drive end fuel feed hole connected with drive end oil sump 322 is opened up on the corresponding interstage sleeve of drive end rear pressing cover 34
340。
Drive end cylinder roller bearing 35 is socketed in the front portion in drive end bearing chamber 321 with pump shaft 11, the rolling of drive end cylinder
The inner periphery of sub- bearing 35 is with the interference fit of pump shaft 11 and by the first drive end axle sleeve 311 and the axle of the second drive end axle sleeve 312
To positioning, excircle and the interference fit of drive end bearing chamber 321 of drive end cylinder roller bearing 35.
Drive end disc 36 is eccentric hoop and is suspended on the first drive end axle sleeve 311 and solid with drive end bearing body 32
It is fixed, the submergence drive end disc 36 of drive end oil sump 322.
The medial surface of front drive end dust pan 371 and rear drive end dust pan 372 is provided with and gland before drive end 33, drive
The corresponding sealing bulge loop of scrobicular ring on the lateral surface of moved end rear pressing cover 34, front drive end dust pan 371 and rear drive end dust pan 372
Its bulge loop correspondence is embedded in gland 33 before drive end, the scrobicular ring of drive end rear pressing cover 34, and is fixed by holding screw correspondence
Before positioned at drive end on gland 33, the pump shaft 11 in the outside of drive end rear pressing cover 34.
In pump operation, because the rotation of pump shaft 11 drives the first drive end axle sleeve 311, by frictional force drive end is got rid of
The freely eccentric rotary of oil ring 36, drives the lubricating oil in drive end oil sump 322 to be continuously supplied in drive end bearing chamber 321, reaches
To the effect to the sufficient lubrication of drive end cylinder roller bearing 35, even if the oil level in drive end bearing chamber 321 is relatively low, drive end gets rid of
Oil ring 36 can also provide lubricating oil and lubricate to drive end cylinder roller bearing 35.When lubricating oil axially spills along pump shaft 11, drive
Oil collecting ring 341 after oil collecting ring 331, the drive end of the inner surface of drive end rear pressing cover 34 before the drive end of the inner surface of gland 33 before moved end
Can intercept will spill lubricating oil, and lubricating oil is flow back into by spill port 332 before drive end and drive end spill port 342
In drive end bearing chamber 321.
Due to being gap cooperation, meeting between the inner peripheral surface and pump shaft 11 of gland 33 and drive end rear pressing cover 34 before drive end
Some leakages are produced, and front drive end dust pan 371 and rear drive end dust pan 372 can increase gland 33 and driving before drive end
The sealing of end rear pressing cover 34.And rotate with pump shaft 11,372 turns of front drive end dust pan 371 and rear drive end dust pan
It is dynamic to prevent oil leak, while dust is also prevented from in drive end bearing chamber 321, and can be to driving
Moved end bearing bore 321 is cooled down, and improves the service life of drive end cylinder roller bearing 35.
It is provided with multi-disc drive end in uniform way respectively on the lower surface of drive end bearing body 32, lateral surface and upper surface in addition
Fin 320, to increase area of dissipation, is conducive to the radiating of lubricating oil and the bearing of drive end cylindrical roller 35.
Meanwhile, the top of drive end bearing body 32 is provided with drive end oil level indicator 328 and drive end lubricating oil temperature meter
329, for detecting the amount and temperature of lubricating oil in drive end oil sump 322, and in drive end oil sump 322 lubricating oil amount or temperature
Degree reaches threshold value alarm.
Free end parts of bearings 4 is arranged on the free end of pump shaft 11, including gland before free end bearing body 42, free end
43rd, free end rear pressing cover 44, free end cylinder roller bearing 45, angular contact ball bearing are to 46, bearing box body 471, a pair of bearings
Disc 482 and free end dust pan 49 after disc 481, free end before lid 472, free end.
Free end bearing body 42 includes the free end bearing bore 421 of the radial outside for being located at the free end of pump shaft 11 and positioned at certainly
The free end oil sump 422 connected by the bottom of end bearing body 42 and with free end bearing bore 421；
Gland 43 is socketed on pump shaft 11 and connects the top front end of free end bearing body 42 before free end, by free end
Bearing bore 421 is closed, and is provided with O-ring seals 423 before free end between gland 43 and free end bearing body 42；Gland before free end
43 inner peripheral surface is provided with oil collecting ring 431 before free end, before opening up one and free end before free end on the medial surface of gland 43
Spill port 432 before the free end of the connection of oil collecting ring 431；A scrobicular ring is opened up before free end on the lateral surface of gland 43, on medial surface
There is an interstage sleeve.
Free end rear pressing cover 44 is enclosed gland and connects the rear end on the top of free end bearing body 42, by free end bearing
Chamber 421 is closed, and on free end rear pressing cover 44 and the contact surface of free end bearing body 42 O-ring seals 424 are arranged；Press after free end
There is an interstage sleeve on the medial surface of lid 44；
Oil-feed before the free end connected with free end oil sump 422 is opened up respectively with the corresponding interstage sleeve of gland before free end 43
Hole 430 opens up respectively fuel feed hole after the free end connected with free end oil sump 422 with the corresponding interstage sleeve of free end rear pressing cover 44
440。
Free end cylinder roller bearing 45 is socketed in the front portion of rear bearing bore 421 with pump shaft 11, free end cylinder roller bearing
45 inner periphery is with the interference fit of pump shaft 11 and passes through the first free end axle sleeve 411 and the axially position of the second free end axle sleeve 412,
The excircle of free end cylinder roller bearing 45 is with the interference fit of free end bearing bore 421 and by free end bearing body 42 and freely
The corresponding interstage sleeve axially position of gland 43 before end.
Angular contact ball bearing is located in bearing box body 471 to 46.And in 11 sets of the rear portion of free end bearing bore 421 and pump shaft
Connect, a pair of bearings lid 472 is connected to the rear and front end of bearing box body 471, and bearing box body 471 is by key and free end shaft
The inner periphery for holding chamber 421 is fixed；Inner periphery and the threeth free end axle sleeve that be socketed in pump shaft 11 on of the angular contact ball bearing to 46
413 interference fit simultaneously pass through the head of the 3rd free end axle sleeve 413 and are socketed in the axial direction of axis head nut 410 of the free end of pump shaft 11
Positioning, excircle and bearing box body 471 interference fit of the angular contact ball bearing to 46.
Disc 482 is eccentric hoop after disc 481, free end before free end, and correspondence is suspended on the second free end shaft
Set 412 and axis head nut 410 on, before free end after disc 481, free end disc 482 by the submergence of free end oil sump 422.
The medial surface of free end dust pan 49 is provided with sealing corresponding with the scrobicular ring on the lateral surface of gland before free end 43
Bulge loop, free end dust pan 49 is socketed on pump shaft 11, and the sealing bulge loop of free end dust pan 49 is embedded in gland 43 before free end
Scrobicular ring in, and gland 43 is fixed before the outside of gland 43 and free end before free end by holding screw 490.
When feedwater pump operation is started, due to the rotational band moving axis head nut 410 and the second free end axle sleeve 412 of pump shaft 11
Rotate, the first free end disc 481 and the second free end disc 482 freely eccentric rotary are made by frictional force, drive
Fuel feed hole 430 and free end rear pressing cover 44 before the free end that lubricating oil in free end oil sump 422 passes through gland 43 before free end
Free end after fuel feed hole 440 be continuously supplied in free end bearing bore 421, to angular contact ball bearing to 46 and free end cylinder roll
The sufficient lubrication of sub- bearing 45, even if the oil level of free end oil sump 422 is relatively low, disc after disc 481, free end before free end
482 can also provide lubricating oil lubricates 46 and free end cylinder roller bearing 45 to angular contact ball bearing, when lubricating oil is along pump shaft
When 11 axial directions spill, oil collecting ring 431 can be intercepted and will spill free end before the free end before free end on the inner surface of gland 43
The lubricating oil of front gland 43, and lubricating oil is flow back in free end bearing bore 421 by spill port 432 before free end.
Due to being gap cooperation between the inner peripheral surface of gland 43 and pump shaft 11 before free end, some leakages can be produced, and
Free end dust pan 49 can increase the sealing of gland 43 before free end.Due to free end dust pan 49 be fixed on pump shaft 11 with
Pump shaft 11 is rotated together, and free end dust pan 49 is rotated and not only can prevent oil leak, while be also prevented from dust entering
Enter in free end bearing body cavity 421, and free end bearing body cavity 421 can be cooled down, improve angular contact ball bearing pair
46 and the service life of free end cylinder roller bearing 45.
It is provided with multi-disc free end in uniform way respectively on the lower surface of free end bearing body 42, lateral surface and upper surface in addition
Front fin 420, fin 441 after being also provided with multi-disc free end in uniform way on the lateral surface of free end rear pressing cover 44, to increase
Plus area of dissipation, be conducive to the radiating of lubricating oil and free end bearing bore 421.
Meanwhile, the top of free end bearing body 42 is provided with free end oil level indicator 428 and free end lubricating oil temperature meter
429, for detecting the amount and temperature of lubricating oil in free end oil sump 422, and in free end oil sump 422 lubricating oil amount or temperature
Degree reaches threshold value alarm.
Due to having used diaphragm type coupler 93 between the drive shaft of pump shaft 11 and motor 92, in free end parts of bearings 4
It is close to arrange the angular contact ball bearing that formed back-to-back to original two angular contacts of 46 replacements using by two angular contact ball bearings
To the form that arranges isolation pad between 46, on the one hand it does not interfere with the balance of the axial force of pump shaft 11 to ball bearing, while not yet
The radiating of free end bearing bore 93 can be affected, more causes the whole structure for starting feedwater pump group compacter, be installed and more save
Space.
Middle nockbush 6 is located between level V pumping chamber 205 and the 9th grade of pumping chamber 209, is socketed in middle axle sleeve
13 radial outside, the sealing medium that can play a part of plays a part of water lubriucated bearing and as the auxiliary of stator component 2
Help support.The middle nockbush 6 includes overcoat 61 and the inner sleeve 62 being embedded on the inner peripheral surface of overcoat 61.
The excircle of overcoat 61 is respectively arranged at two ends with outer bulge loop, by fixed between the periphery and lower pump body 21 of overcoat 61
Position pin is fixed, and the drive end of the inner peripheral surface of overcoat 61 is provided with the outer circumference surface clamping of internal projecting ring and inner sleeve 62.
The material of inner sleeve 62 is engineering material, is the WR300 rubber industries of Greene Tweed companies of the U.S., is a kind of length
Carbon fiber reinforced polyether-ether-ketone resin, with good intensity, stability and thermal diffusivity and wearability, makes startup feed pump in fortune
Will not seize in row and cause pump shaft 11 rupture phenomenon.
Afterwards nockbush 7 is arranged in the inner chamber of stator component 2, the radial outside of the free end axle sleeve 16 being socketed in, and is made
For the Auxiliary support of stator component 2.
Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to illustrate that this practicality is new
Type, and be not used as be to restriction of the present utility model, if in spirit of the present utility model, to the above
Change, the modification of embodiment all will fall in Claims scope of the present utility model.
Claims (10)
1. a kind of startup for nuclear power station is fed water pump group, including base and the motor positioned at the base top surface, the electricity
The axial direction of machine is respectively arranged at the two ends with a startup feed pump being connected with its drive shaft, it is characterised in that：
The startup feed pump includes stator component and rotor part；
The stator component is divided into lower pump body and upper pump cover along its horizontal flange, and the lower pump body and the upper pump cover pass through
Multipair stator compresses sealing ring and stator hold-down bolt is fixed as one；
The rotor part includes pump shaft, and the drive end of the pump shaft passes through the drive end phase of diaphragm type coupler and the motor
Even；
The lower pump body and the upper pump cover surround the first order in the stator component to the 9th grade of pumping chamber, the first order
To level V pumping chamber along the axial direction of the pump shaft, set gradually to free end from drive end, the 6th grade to the 9th grade pressure water
Room sets gradually from free end along the axial direction of pump shaft to drive end；
It is additionally provided with lower pump body just to the suction flange of first order pumping chamber, and just to the outlet(discharge) flange of the 9th grade of pumping chamber；
The bottom of the bottom of first order pumping chamber and the 6th grade of pumping chamber is connected by balancing pipeline；
The rotor part also includes the first order being socketed on the pump shaft to the 9th grade of impeller, middle axle sleeve, free end shaft
Set and sleeve nut；
The first order to the 9th grade of impeller is located at correspondingly first order pumping chamber to the 9th grade of pumping chamber, the first order to the 5th
The drive end of pump shaft is pointed to described in the import of level impeller, the freedom of the pump shaft is pointed in the import of the 6th grade to the 9th grade impeller
End；
The intermediate seal axle sleeve is socketed between the level V impeller and the 9th grade of impeller with the pump shaft；
The free end shaft is enclosed within the 6th grade and is socketed and by being socketed in the pump shaft between impeller and the sleeve nut
State the sleeve nut on pump shaft to be fixed on the pump shaft.
2. a kind of startup for nuclear power station according to claim 1 is fed water pump group, it is characterised in that：The diaphragm type connection
Axle device includes the pump end shaft coupling being connected with the pump shaft, intermediate shaft coupling and the motor being connected with the drive shaft of the motor
End shaft coupling, pump end shaft coupling, the intermediate shaft coupling and the motor side shaft coupling are sequentially connected, pump end shaft coupling
Between device and the intermediate shaft coupling, and vibration damping film is equipped between the motor side shaft coupling and the intermediate shaft coupling
Piece.
3. a kind of startup for nuclear power station according to claim 1 is fed water pump group, it is characterised in that：The stator component
Axial two ends be equipped with the pump shaft socket mechanical seal,
The mechanical seal include machine sealed cover, machine envelope connection ring, machine envelope axle sleeve, stationary ring, spring base, rotating seat, rotating ring and
Some springs；
The machine envelope connection ring is socketed on the pump shaft, and is fixed with the stator component, and the machine sealed cover is socketed in institute
State on pump shaft and coaxially fix with machine envelope connection ring, machine envelope is formed between the machine envelope connection ring and the machine sealed cover
Chamber；The machine sealed cover is provided with the injection runner connected with the machine sealing chamber；
On the fixedly sleeved pump shaft of machine envelope axle sleeve, one end of the machine envelope axle sleeve is located in the machine sealing chamber, and in addition one
Hold from the radially inner side of the machine sealed cover and stretch out the machine sealing chamber, and fixed with the pump shaft by lock-screw；
The stationary ring is fixed on the machine sealed cover towards on the inner peripheral surface of one end of the machine sealing chamber；
The spring socket sleeve is connected on the radial outside that machine envelope axle sleeve is located at one end in the machine sealing chamber, the spring base back to
The end face of described machine envelope connection ring one end is disposed with the axially in parallel annular groove with pump shaft, around the bottom of the annular groove
The circumference in face, be evenly equipped with it is some axially in parallel with the pump shaft, for installing the spring eye of the spring；
The rotating seat is connected in the annular groove of the spring base with the spring, and can be along the axial direction of the annular groove
Horizontal sliding, the rotating seat is a L-shaped ring；Shape between the inner peripheral wall of the outer circle wall of the rotating seat and the spring base
Into rotating ring groove；
The inner peripheral wall of the rotating ring is axially displaceably socketed in the middle part that the machine seals axle sleeve, and the rotating ring is towards the bullet
In the embedded described rotating ring groove of one end of spring；
The rotating ring and the stationary ring forced contact.
4. a kind of startup for nuclear power station according to claim 3 is fed water pump group, it is characterised in that：The machine sealed cover
Radially inner side back to machine sealing chamber one end is provided with restrictor ring that axle sleeve socket is sealed with the machine, and the restrictor ring is by baffle plate and fixed
Position block is fixed with the machine sealed cover.
5. a kind of startup for nuclear power station according to claim 3 is fed water pump group, it is characterised in that：The machine sealed cover
It is provided with the injection runner connected with the machine sealing chamber；The startup feedwater pump group for nuclear power station also includes flushing line,
The flushing line includes being located at the total flushing line above the upper pump cover, by total flushing line and two machineries
Two flushing introduction pipelines of the injection runner correspondence connection of sealing, total flushing line is connected with the first order pumping chamber
Pipeline is drawn in the first logical flushing, and the second flushing that total flushing line is connected with the transition runner in the upper pump cover is drawn
Go out pipeline；The last time water lines that total flush pipe is connected with the base, and by the plug on the lower pump body and institute
State the water lines next time of base connection.
6. a kind of startup for nuclear power station according to claim 5 is fed water pump group, it is characterised in that：Described flushing introduces
Connected by three-way valve between pipeline and total flushing line.
7. a kind of startup for nuclear power station according to claim 5 is fed water pump group, it is characterised in that：The last time water pipe
Road is provided with stop valve connection.
8. the startup feed pump for nuclear power station according to claim 1, it is characterised in that：The drive end set of the pump shaft
Connect drive end bearing part, the free end socket free end parts of bearings of the pump shaft；
The drive end bearing part includes gland before drive end bearing body, drive end, drive end rear pressing cover, the rolling of drive end cylinder
Sub- bearing and drive end disc；
The drive end bearing body includes being located at the drive end bearing chamber of the pump shaft radial outside and positioned at the drive end axle
The drive end oil sump for holding chamber bottom and connecting with drive end bearing chamber；
Gland and the drive end rear pressing cover are socketed on the pump shaft and seal in the drive end bearing chamber before the drive end
Close；Set an interstage sleeve respectively on the medial surface of gland and the drive end rear pressing cover before the drive end, with the drive end after press
Cover corresponding interstage sleeve and open up drive end fuel feed hole,
The drive end cylinder roller bearing is socketed in the drive end bearing intracavity and the pump shaft, the drive end cylinder rolling
The inner periphery of sub- bearing is hung by the first drive end axle sleeve and the second drive end axle sleeve axially position, the drive end disc
Fix on first drive end axle set and with the first drive end bearing body, the bottom submergence of the drive end disc
In the drive end oil sump；
The free end parts of bearings includes gland, free end rear pressing cover, free end cylinder before free end bearing body and free end
Roller bearing, angular contact ball bearing to, bearing box body, the bearing lid for being connected to the bearing box body two ends and two free ends
Disc；
The free end bearing body includes holding chamber with pump shaft socket free end shaft, and under the free end bearing bore
Portion, and the free end oil sump connected with the free end bearing bore；
Gland and the free end rear pressing cover are socketed on the pump shaft and seal the free end bearing bore before the free end
Close；Set an interstage sleeve, the free end rear pressing cover before the free end on the medial surface of gland and the free end rear pressing cover respectively
Corresponding interstage sleeve opens up free end fuel feed hole；
The free end cylindrical roller in the anterior socket with the pump shaft of the free end bearing bore, the cylinder roller bearing
Inner periphery is by the first free end axle sleeve and the second free end axle sleeve axially position；
The angular contact ball bearing is pointed to the bearing box body, and in the free end bearing bore rear portion and the pump shaft sleeve
Connect, the inner periphery of the angular contact ball bearing pair is with the 3rd free end axle sleeve interference fit being socketed on the pump shaft and passes through
The head of the 3rd free end axle sleeve and the axis head nut axially position for being socketed in the pump shaft free end；
Two free end discs are suspended on the axis head nut respectively and second free end shaft puts, described in two
The bottom of free end disc is immersed in the free end oil sump.
9. the startup feed pump for nuclear power station according to claim 8, it is characterised in that：The drive end bearing part
Drive end before the lateral surface of gland, the lateral surface of the drive end rear pressing cover of the drive end bearing part and the free end
The lateral surface of gland is equipped with the dust pan being fixed by socket with the pump shaft before the free end of parts of bearings.
10. the startup feed pump for nuclear power station according to claim 8, it is characterised in that：The drive end bearing body
It is provided with the drive end oil level indicator and drive end lubricating oil temperature meter connected with the drive end oil sump, the free end shaft
Hold body and be provided with the free end oil level indicator and free end lubricating oil temperature meter connected with the free end oil sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621090509.0U CN206175247U (en) | 2016-09-29 | 2016-09-29 | A starting feed water pump group for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621090509.0U CN206175247U (en) | 2016-09-29 | 2016-09-29 | A starting feed water pump group for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206175247U true CN206175247U (en) | 2017-05-17 |
Family
ID=58678747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621090509.0U Active CN206175247U (en) | 2016-09-29 | 2016-09-29 | A starting feed water pump group for nuclear power station |
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| Country | Link |
|---|---|
| CN (1) | CN206175247U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337821A (en) * | 2016-09-29 | 2017-01-18 | 上海阿波罗机械股份有限公司 | Startup feedwater pump set for nuclear power plant |
-
2016
- 2016-09-29 CN CN201621090509.0U patent/CN206175247U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337821A (en) * | 2016-09-29 | 2017-01-18 | 上海阿波罗机械股份有限公司 | Startup feedwater pump set for nuclear power plant |
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Address after: No. 555, Yisong Road, Nanqiao Town, Fengxian District, Shanghai 201401 Patentee after: SHANGHAI APOLLO MACHINERY Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 555, Yisong Road, Nanqiao Town, Fengxian District, Shanghai 201401 Patentee before: SHANGHAI APOLLO MACHINERY Co.,Ltd. Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE |