CN102606540A - Water pump for factory for nuclear power station - Google Patents
Water pump for factory for nuclear power station Download PDFInfo
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- CN102606540A CN102606540A CN2012100834485A CN201210083448A CN102606540A CN 102606540 A CN102606540 A CN 102606540A CN 2012100834485 A CN2012100834485 A CN 2012100834485A CN 201210083448 A CN201210083448 A CN 201210083448A CN 102606540 A CN102606540 A CN 102606540A
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Abstract
The invention discloses a water pump for a factory for a nuclear power station, which comprises a pump body, a rotor member, a machine seal, a machine seal flushing pipeline and a bearing member. The pump body comprises an inlet loudspeaker, a pump shell, a joint pipe, an outlet elbow, a pump base, a pump cover and a motor base; the rotor member comprises a pump shaft, an impeller and an impeller nut. The pump shell is composed of a primary pump shell group, a secondary pump shell group and a final pump shell group which are connected in series orderly from bottom to top. Each pump shell group is composed of a joint shell and a flow guiding shell connected to the upper end of the joint shell; the lower end of a primary joint shell is connected with the inlet loudspeaker, the upper end of a final flow guiding shell is connected with the joint pipe. The machine seal device is a cartridge mechanical seal, and the machine seal device is installed on the pump shall at the upper part of the pump cover. The machine seal flushing pipeline comprises a water inlet pipeline and a water outlet pipeline. The bearing part comprises pilot bearings arranged between the inlet loudspeaker and the pump shaft, between the primary pump shell group and the pump shaft, between the secondary pump shell group and the pump shaft and between the final pump shell and the pump shaft.
Description
Technical field
The present invention relates to a kind of house service pump that is used for nuclear power station, be specifically related to a kind of house service pump that is used for nuclear power station.
Background technique
The working medium that is used for the house service pump of nuclear power station is to contain sea of sand water.The major function of essential service water pump in nuclear power station is that the liquid heat that the component cooling water system transmission comes finally is transferred to seawater, and extracting seawater is cooled off component cooling water in other words.It is as the ultimate heat sink of nuclear island, and its significance is self-evident.
The house service pump of AP1000 nuclear power station is vertical, major axis centrifugal pump.Therefore the pump housing is made up of a plurality of parts, can produce error axially processing and install generally; The major axis pump of general structure will overhaul impeller rotor part must take rising pipe apart, could pull the rotor part of pump bottom, is unfavorable for very much site examining and repairing.The house service pump of nuclear power station is to carry undressed seawater again, and the sand content in the seawater is than higher, and its flow passage components especially impeller need the anti-erosion that contains the sand medium.The house service pump of existing structure is to adopt the single-stage impeller; Therefore the diameter of impeller is bigger, and the linear velocity at impeller outlet place is higher, the ability that causes the erosion of anti-high sand medium also a little less than; And the radial vibration phenomenon can appear in running, the radial vibration of bottom is especially serious.In addition, adopt packing seal as the machine front cover of vertical long shaft pump, though packing seal maintenance and change conveniently, its sealability does not have mechanical seal good, therefore can not satisfy the usage requirement of house service pump.
Summary of the invention
The objective of the invention is provides a kind of house service pump that is used for nuclear power station in order to overcome the deficiency of existing technology, and it can improve hydraulic performance, reduces the vibration of pump group in running, increases working life.
The technological scheme that realizes above-mentioned purpose is: a kind of house service pump that is used for nuclear power station; Comprise the pump housing, rotor part, machine seal apparatus, machine envelope flushing line and bearing part; Wherein, The said pump housing comprises import loudspeaker, pump case, connecting tube, outlet bend pipe, pump seat, pump cover and motor cabinet, and said pump case is made up of the chopped-off head pump case group, secondary pump case group and the final stage pump case group that are connected in series successively from bottom to top, and each pump case group constitutes by connecting shell and being connected the blower inlet casing that connects the shell upper end; The lower end that said chopped-off head connects shell connects the import loudspeaker, and the upper end of said final stage blower inlet casing connects connecting tube; The upper end of said connecting tube reaches the inner chamber middle part of said pump seat; The upper end of said pump seat connects a mounting flange, and the outer of the upper-end surface of this mounting flange is convexly equipped with a retaining ring, and the wall top of this pump seat is offered a drain opening and outside this drain opening, connected a horizontal waste pipe; Said outlet bend pipe is located in the inner chamber of said pump seat; Waterexit end and the lower end of this outlet bend pipe respectively with said pump seat on waste pipe and the upper end of said connecting tube be connected, it is one coaxial and with the last straight tube of diameter with said connecting tube that the tube wall top of this outlet bend pipe is provided with; Said pump cover comprises that the adaptive regulating ring and of internal diameter that cover plate, is connected lower end surface and the external diameter and the said retaining ring of cover plate is positioned at regulating ring and coaxial and with the lower straighttube of diameter with the last straight tube on the said outlet bend pipe, and this pump cover is inserted in the retaining ring of said pump seat with said regulating ring and the last straight tube ways of connecting on said lower straighttube and the said outlet bend pipe is installed in the upper end of said pump seat; Said motor cabinet, said pump cover and said pump seat are stacked successively from top to bottom and link together through some connecting bolts;
Said rotor part comprises pump shaft, impeller and impeller nut, and the bottom desired location of said pump shaft is provided with a shaft shoulder; Said impeller comprises and is installed on the said pump shaft from bottom to top in the same way and is arranged in first stage impeller that said chopped-off head connects shell, is arranged in the secondary impeller of said secondary connection shell and is arranged in the impeller that said final stage connects shell; Said impeller nut is installed in the lower end of said pump shaft; Said first stage impeller is through being arranged on the lower end axle sleeve axially locating of said impeller nut upper end; Said secondary impeller and said impeller are respectively through being successively set on the middle axle sleeve and the lower end axle sleeve axially locating of said first stage impeller upper end and said secondary impeller upper end; Spacing between the said impeller and the said shaft shoulder through the upper end axle sleeve;
Said machine encapsulation is changed to integrated mechanical sealing, and this machine seal apparatus is installed on the pump shaft of said pump cover top;
Said machine envelope flushing line comprises inlet pipeline and rising pipe, and said inlet pipeline comprises that threeway, safety check and two ends that are connected the external water pipe of the water intake of machine sealing chamber body, are located on the external water pipe successively are connected to the interior water receiving pipe on the threeway and the pump housing; The two ends of said rising pipe are connected on the water outlet and pump hole of machine sealing chamber body;
Said bearing part comprise be located between said import loudspeaker and the pump shaft, the guide bearing between said chopped-off head pump case group and the pump shaft, between said secondary pump case group and the pump shaft, between said final stage pump case and the pump shaft.
The above-mentioned house service pump that is used for nuclear power station; Wherein, Said blower inlet casing includes guide plate outer cover, guide plate inner cover and multi-disc guide plate, and said guide plate outer cover and guide plate inner cover constitute guide channel, and said multi-disc guide plate is dispersion shape and is distributed in the guide channel and with guide plate outer cover and guide plate inner cover and links into an integrated entity; The inner of said guide plate inner cover is provided with support sleeve, the import of said guide plate outer cover and the said outlet smooth transition that connects shell; The import inwall of said connecting tube is up big and down small conical surface; The outlet inwall of the outlet inwall of the guide plate outer cover of said chopped-off head blower inlet casing and the guide plate outer cover of said secondary blower inlet casing is up-small and down-big conical surface; The outlet inwall of the guide plate outer cover of said final stage blower inlet casing is the cylndrical surface, so that the import smooth transition of the outlet of the guide plate outer cover of said final stage blower inlet casing and connecting tube.
The above-mentioned house service pump that is used for nuclear power station; Wherein, Said machine seal apparatus comprises machine envelope axle sleeve, machine sealing chamber body, machine sealed cover, assembled plate, retainer, rotating ring, stationary ring and some springs; The bottom of the outer circumferential face of said machine envelope axle sleeve is provided with an outer bulge loop, and the upper-end surface of this outer bulge loop is provided with some spring eyes with being uniformly distributed along the circumference, and this machine envelope axle sleeve is enclosed within on the said pump shaft regularly; The top of the inner cavity surface of said machine sealing chamber body is provided with internal projecting ring, and the inner headed face of this internal projecting ring is up big and down small one-level ladder surface, and said machine sealing chamber body is installed on the said pump cover through a bearing support; The bottom of the inner headed face of said machine sealed cover is provided with an outside ladder surface, and the ladder surface on this ladder surface and the said machine sealing chamber body is common to be constituted one annular groove is installed, and this machine sealed cover is connected the upper end of said machine sealing chamber body; Said assembled plate is connected to the top of said machine envelope axle sleeve, so that said machine sealed cover and machine sealing chamber axon are to being fixed on the said pump housing; Said stationary ring is inlaid in the installation annular groove of said machine sealed cover and machine sealing chamber body formation; The centre of the inner cavity surface of said retainer is provided with a protruding dish; And the external diameter of the outer bulge loop on the interior circular diameter of this protruding dish bottom and the said machine envelope axle sleeve is adaptive; The interior circular diameter on this protruding dish top and the external diameter of said rotating ring are adaptive, and this retainer is positioned at the outer bulge loop of said machine envelope axle sleeve with protruding dish the mode of top can be installed on the said machine envelope axle sleeve with moving axially; Said rotating ring is fixed in the inner chamber on protruding dish top of said retainer; Said some springs are placed in the spring eye of said machine envelope axle sleeve one by one, and the upper end of these some springs is connected the lower end surface of the protruding dish of said retainer, so that fit slidably in the lower end surface of the upper-end surface of said rotating ring and said stationary ring.
The above-mentioned house service pump that is used for nuclear power station, wherein, the outside of the regulating ring of said pump cover also is provided with an adjustment pad between the lower end surface of the cover plate of the upper-end surface of the mounting flange of said pump seat and said pump cover.
The above-mentioned house service pump that is used for nuclear power station, wherein, the bottom of the outer circumferential face of said connecting tube is provided with a radial support flange.
The above-mentioned house service pump that is used for nuclear power station, wherein, the top of the outer circumferential face of said lower end axle sleeve is the little down big conical surface of, so that the wheel hub entrance point smooth transition of lower end axle sleeve and said first stage impeller, secondary impeller and impeller.
The above-mentioned house service pump that is used for nuclear power station; Wherein, The lower end surface of said pump shaft is provided with a tapped blind hole coaxial with pump shaft; Said impeller nut is the covering cap shape nut, and the surperficial central authorities of its block offer a through hole, and said impeller nut passes through hole through one and is threaded in the lower end that lock screw in the tapped blind hole of said pump shaft is installed in said pump shaft.
The above-mentioned house service pump that is used for nuclear power station, wherein, said in the middle of between axle sleeve and the lower end axle sleeve, be provided with one respectively between said upper end bearing and the shaft shoulder and get rid of husky the ring.
The above-mentioned house service pump that is used for nuclear power station wherein, also is provided with a stop valve respectively in the front and rear portions of said safety check on the external water pipe of said inlet pipeline; On the interior water receiving pipe of said inlet pipeline a stop valve is set.
The above-mentioned house service pump that is used for nuclear power station, wherein, said connecting tube comprises the plurality of sections unit pipe and is connected the intermediate support between the two segment unit pipes, is respectively equipped with guide bearing between each intermediate support and the said pump shaft.
The technological scheme that is used for the house service pump of nuclear power station of the present invention; The pump housing adopts whole Drawing-Core structure; Promptly can be under the situation of not dismantling outlet conduit; The workpiece that will be positioned at pump seat inside and bottom pulls out from the upper end-hole of pump seat and overhauls, thereby has shortened the repair time of rotor part greatly; Pump case adopts from bottom to top successively, and three groups of pump case groups of serial connection constitute; And following two-stage pump case group is measure-alike; The outlet diameter of final stage pump case group is greater than the outlet diameter that descends two-stage pump case group and identical with the inlet diameter of connecting tube; Make final stage pump case group outlet can with the import smooth transition of connecting tube, thereby reduced hydraulic loss; Rotor part adopts between the upper and lower at a distance from three grades of impellers that are connected in series; The relative single-stage impeller of these three grades of impellers has reduced outlet diameter; Reduce the lift of impeller and reduced the linear velocity of impeller outlet place medium, thereby improved the ability of impeller Nai Gaosha water erosion, increased the working life of impeller; Unit loading type machine seal apparatus is adopted in mechanical seal; The convenient installation and maintenance, and outside framework oil seal is set on the top of machine sealed cover, both can limit the leakage of working medium in the machine sealing chamber; Prevent the sealed friction surface dry friction in the machine seal apparatus, can also prevent outer certainly intrusions in the machine sealing chamber such as silt; The mode that combines from flushing and outer flushing is adopted in the flushing of machine envelope; Promptly when pressure medium that external water pressure is carried greater than pump, adopt outer water receiving to wash; When pressure medium that external water pressure is carried less than pump, introduce fed sheet of a media in the pump body machine seal apparatus is washed, the sealing surface of machine seal apparatus is washed fully and cool off; Assurance machine seal apparatus proper functioning, the working life of prolongation machine seal apparatus.A strong point is established in the bottom that on mounting structure, is employed in water pump; A radial support flange is established on the top that is the final stage blower inlet casing of pump; Force radial support flange and the pump outer shroud that is embedded on the subfoundation to be combined closely; Driving torque is directly born by subfoundation, thereby can effectively eliminate the radial vibration that water pump produces, improve the stability of pump group; Being employed in increases by an adjustment pad on the junction plane of pump cover and pump seat, can remedy the axial processing and the alignment error of the pump housing, thereby can guarantee cooperating between radial support flange and the subfoundation.
Description of drawings
Fig. 1 is the structural representation of house service pump of the present invention;
Fig. 2 is the mounting structure figure of house service pump of the present invention;
Fig. 3 is the structural representation of the pump housing bottom of house service pump of the present invention;
Fig. 4 is the structural representation on the pump housing top of house service pump of the present invention;
Fig. 5 is the structural representation of the rotor part of house service pump of the present invention;
Fig. 6 is the structural representation of the machine seal apparatus of house service pump of the present invention;
Fig. 7 is the structural representation that the machine of house service pump of the present invention seals inlet pipeline in the flushing line;
Fig. 8 is the structural representation that the machine of house service pump of the present invention seals rising pipe in the flushing line.
Embodiment
In order to understand technological scheme of the present invention better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1 and Fig. 2, the house service pump that is used for nuclear power station of the present invention comprises the pump housing, rotor part, machine seal apparatus 3, machine envelope flushing line and bearing part.
See also Fig. 3 and Fig. 4 again, the pump housing comprises import loudspeaker 11, pump case 12, connecting tube 13, pump seat 14, outlet bend pipe 15, pump cover 16 and motor cabinet 17, wherein:
Chopped-off head connects shape and all identical and big up and small down horn shape of size that shell, secondary coupling housing and final stage connect shell;
The inner of every grade of guide plate inner cover 202 is integrally formed with the support sleeve that cooperates with pump shaft 20, the import of every grade of guide plate outer cover 201 respectively with the outlet smooth transition that connects shell 121 of the corresponding levels;
The outlet internal diameter of the guide plate outer cover 201 of chopped-off head blower inlet casing and the guide plate outer cover 201 of secondary blower inlet casing is identical; The outlet internal diameter of the guide plate outer cover 201 ' of final stage blower inlet casing 122 ' is greater than the outlet internal diameter of the following guide plate outer cover 201 of two-stage blower inlet casing and identical with the inlet diameter of connecting tube 13; So that the import smooth transition of the upper outlet of the guide plate outer cover 201 ' of final stage blower inlet casing 122 ' and connecting tube 13, thereby can reduce hydraulic loss;
The guide plate outer cover of chopped-off head blower inlet casing, secondary blower inlet casing and final stage blower inlet casing by the die casting moulding; And outlet inwall 200 is up-small and down-big conical surface; For the outlet of the guide plate outer cover 201 ' that makes final stage blower inlet casing 122 ' and the import smooth transition of connecting tube 13, the outlet inwall 200 ' of the guide plate outer cover 201 ' of final stage blower inlet casing 122 ' is processed as the cylndrical surface;
Connecting tube 13 is made up of five segment unit pipes and the intermediate support 130 that is connected between the two segment unit pipes, and the lower end import inwall of connecting tube 13 is up big and down small conical surface, and the bottom of this connecting tube 13 is provided with a radial support flange 136;
Also be provided with seal ring 160 between the outer circumferential face of the regulating ring 162 on the pump cover 16 and the inner peripheral surface of the retaining ring 142 on the pump seat 14, so that regulating ring 162 seals through seal ring 160 with retaining ring 142 movably;
The one adjustment pad 140 that is enclosed within outside the regulating ring 162 of pump cover 16 also is set between the lower end surface of the cover plate 161 of the upper-end surface of the mounting flange 141 of pump seat 14 and pump cover 16;
The upper-end surface of the mounting flange 141 on the pump seat 14 also offer one with pump cover 16 on the corresponding annular groove 145 of regulating ring 162, to enlarge the shift motion of regulating ring 162;
When the pump housing is installed on the basis, upper strata 61 through last pivot flange 146 after; Adjustment pad 140 can remedy the axial processing and the alignment error of the pump housing; Thereby the pump outer shroud 60 on guaranteeing radial support flange 136 and being embedded in subfoundation 62 is combined closely cooperating between the subfoundation 62; Driving torque is directly born by subfoundation 62, thereby can effectively eliminate the radial vibration that water pump produces, improve the stability of pump group.Upper strata basis 61 has 11.36m also to be connected through cement casing 63 with distance between the subfoundation 62.
The pump housing that is used for the house service pump of nuclear power station of the present invention can overhaul the workpiece below the basis, upper strata 61 under the situation of not dismantling outlet conduit 144, thereby has shortened the repair time of rotor part greatly.
See also Fig. 5 again, rotor part comprises pump shaft 20, impeller and impeller nut 24, wherein:
The bottom desired location of pump shaft 20 is provided with a shaft shoulder 200;
Impeller comprises and is installed on the pump shaft 20 from bottom to top in the same way and is arranged in first stage impeller 21 that chopped-off head connects shell, is arranged in the secondary impeller 22 of secondary connection shell and is arranged in the impeller 23 that final stage connects shell that the structure and the size of first stage impeller 21, secondary impeller 22 and impeller 23 are all identical;
Separate through a lower end axle sleeve 25 between first stage impeller 21 and the impeller nut 24, to confirm the setting height(from bottom) of first stage impeller 21;
Separate through a middle axle sleeve 26 and a lower end axle sleeve 25 successively between first stage impeller 21 and the secondary impeller 22, to confirm the setting height(from bottom) of secondary impeller 22;
Separate through a upper end axle sleeve 27 between the impeller 23 and the shaft shoulder 200, so that first stage impeller 21, secondary impeller 22 and impeller 23 axially locating are on pump shaft 20;
The top of the outer circumferential face of lower end axle sleeve 25 is the little down big conical surface of; So that the wheel hub entrance point smooth transition of lower end axle sleeve 25 and first stage impeller 21, secondary impeller 22 and impeller 23; Reduce the flowing pressure of medium, improve the hydraulic performance of impeller at the impeller inlet end.
The rotor part that is used for the house service pump of nuclear power station of the present invention; Because the mounting point of having raised impeller; Therefore reduce the lift of impeller, and the outlet diameter that reduces of single-stage impeller relatively, reduced the dielectric wire speed at impeller outlet place; Thereby improved the ability of impeller Nai Gaosha water erosion, increased the working life of impeller.In addition; Hexagonal spiral shell head screw in lock screw 240 adopts; The spiral shell head of lock screw 240 is against on the step surface of stepped shaft through hole of impeller nut 24, and the spiral shell head of lock screw 240 does not expose the surface of the block of impeller nut 24, both can prevent that impeller nut 24 from becoming flexible because of the counter-rotating of pump shaft 20; Can drop to minimumly again to medium in the flow interfering of the entrance point of pump, can not influence hydraulic performance.
See also Fig. 6 again, machine seal apparatus 3 is an integrated mechanical sealing, and this machine seal apparatus 3 is installed on the pump shaft 20 of pump cover 16 tops.Machine seal apparatus 3 comprises machine envelope axle sleeve 31, machine sealing chamber body 32, machine sealed cover 33, assembled plate 34, stationary ring 35, retainer 36, rotating ring 37 and some springs 38, wherein:
Machine envelope axle sleeve 31 is enclosed within on the pump shaft 20 through clamping ring 311 regularly; The top of the outer circumferential face of this machine envelope axle sleeve 31 is provided with a scrobicular ring; The bottom is provided with an outer bulge loop 312, and the upper-end surface of this outer bulge loop 312 is provided with some spring eyes and some positioning pin holes with being uniformly distributed along the circumference; Be provided with O-ring seals 313 between the inner headed face of this machine envelope axle sleeve 31 and the pump shaft;
On the pump cover 16 that machine sealing chamber body 32 is installed in through a bearing support 50, the top of the inner cavity surface of this machine sealing chamber body 32 is provided with internal projecting ring, and the inner headed face of this internal projecting ring is up big and down small one-level ladder surface; Offer a sparge water import 321 and sparge water outlet 322 on the wall of machine sealing chamber body 32, this sparge water import 321 and sparge water outlet 322 is sealed flushing line with machine on being located at the pump housing and is connected;
Machine sealed cover 33 is connected the upper end of machine sealing chamber body 32, and the bottom of the inner headed face of this machine sealed cover 33 is provided with an outside ladder surface, and the ladder surface on this ladder surface and the machine sealing chamber body 32 is common to be constituted one annular groove is installed;
Assembled plate 34 is connected in the top scrobicular ring of machine envelope axle sleeve 31, and through screw 340 machine sealed cover 33 and machine sealing chamber body 32 is axially fixed on the bearing support 50; Between the upper-end surface of the lower end surface of machine sealing chamber body 32 and bearing support 50 with an O-ring seals 350 is set;
The centre of the inner cavity surface of retainer 36 is provided with a protruding dish 360; And the external diameter of the outer bulge loop 312 of the interior circular diameter of these protruding dish 360 bottoms and machine envelope axle sleeve 31 is adaptive; The interior circular diameter on these protruding dish 360 tops and the external diameter of rotating ring 37 are adaptive; Offer the corresponding perforation of positioning pin hole on some and the machine envelope axle sleeve 31 on the surface of the protruding dish 360 of this retainer 36, this retainer 36 be positioned at protruding dish 360 machine envelope axle sleeve 31 outer bulge loop 312 the top mode and can be installed in machine through some locating studs 361 with moving axially and seal on the axle sleeve 31; Be provided with O-ring seals 314 between the outer circumferential face of the outer bulge loop 312 of the inner headed face of protruding dish 360 bottoms of this retainer 36 and machine envelope axle sleeve 31;
Rotating ring 37 is located at through O-ring seals 370 in the inner chamber on protruding dish 360 tops of retainer 36 and through two pins 362 and is fixed on the protruding dish 360 of retainer 36;
Some springs 38 are placed in the spring eye of machine envelope axle sleeve 31 one by one; Can squint by restraining spring 38; The front end of these some springs 38 is connected the lower end surface of the protruding dish 360 of retainer 36, so that fit slidably and form sealed friction surface in the lower end surface of the upper-end surface of rotating ring 37 and stationary ring 35.
The working principle of machine seal apparatus of the present invention is: in the pump operation process; In the machine sealing chamber that bearing support 50, machine sealing chamber body 32 and machine sealed cover 33 constitute, can form to be full of and have the certain pressure fed sheet of a media; Because the both ends of the surface area that rotating ring 37 is stressed does not wait; Can form impacting force to stationary ring 35; And stationary ring 35 fits the sealed friction surface appropriateness that forms between rotating ring 37 and the stationary ring 35 through spring 38, keeps the purpose that one deck liquid film as thin as a wafer reaches sealing between the sealing rubbing surface thereby so make.
Because pump no medium lubrication and seal rubbing surface in seven times in second of initial start stage; For preventing that the sealed friction surface dry friction from damaging; The back of employing machine seal apparatus is provided with a liquid-soaked jar; And on the wall of machine sealed cover 33, offer a Lubricants import 331 and Lubricants outlet 332, this Lubricants import 331 and Lubricants outlet 332 are connected with the liquid-soaked jar, are used for lubricating of the preceding sealed friction surface of pump startup.
Touch the liquid position, promptly stationary ring 35, retainer 36, rotating ring 37 all adopt dual phase steel S31803, and spring 37 adopts Hastelloy Hast.C4, but the washing away of the corrosion of sea water resistance and silt.The surface of contact of stationary ring 35 and rotating ring 37 all is covered with one deck silicon carbide, to be applicable to the medium that contains silt.In order to prevent sedimentation in the micro-leakage liquid in spring eye, the spring blocking hole was lost efficacy spring 38, in spring eye, filled special-purpose silicone grease, to guarantee normal long-term use of spring.
In addition, in the upper end portion of the internal chamber wall of machine sealed cover 33 a necking down ring 330 is set, the internal diameter of this necking down ring 330 cooperates with the crest clearance of machine envelope axle sleeve 31, not influence the rotation of pump shaft 20; One oil sealing chamber is set in the bottom of this necking down ring 330; And an outside framework oil seal 39 is set in this oil sealing chamber; This outside framework oil seal 39 both can limit the leakage of working medium in the machine sealing chamber, prevented the sealed friction surface dry friction in the machine package cavity, can also prevent outside certainly intrusions in the machine sealing chamber such as silt.
Machine seal apparatus 3 adopts the mode that combines from flushing and outer flushing; Promptly when pressure medium that external water pressure is carried greater than pump, adopt outer water receiving to wash; When pressure medium that external water pressure is carried less than pump, introduce fed sheet of a media in the pump housing machine seal apparatus is washed.
See also Fig. 7 and Fig. 8 again, machine envelope flushing line comprises inlet pipeline 41 and rising pipe 42, wherein:
The two ends of rising pipe 42 are connected in the sparge water outlet 322 and basis, upper strata 61 of machine sealing chamber body 32; This rising pipe 42 is made up of four sections straight tubes and three 90 ° of elbows; The trend that makes rising pipe 42 be successively earlier outwards, then downwards, inside again, downwards last.
When pressure medium that external water pressure is carried greater than pump,, utilize external water pipe 411 to introduce industry waters the machine seal apparatus is washed 415 conductings of the safety check on the inlet pipeline 41.When pressure medium that external water pressure is carried less than pump, the safety check on the inlet pipeline 41 415 cuts out, in pump seat 14, introduce fed sheet of a media through interior water receiving pipe 412 to 3 flushings of machine seal apparatus, sparge water is guided in the basis, upper strata 61 through rising pipe 42.Therefore, the sealed friction surface of machine seal apparatus 3 is washed fully and cool off, guarantee machine seal apparatus 3 proper functioning, prolong the working life of machine seal apparatus 3.Owing to contain sand in the medium, at the intracavity bottom of pump seat 14 setting pot 40 is set, can reduce the sand content in the sparge water, reduce the wearing and tearing of mechanical seal.
Bearing part comprise be located between import loudspeaker 11 and the pump shaft 20, the support sleeve on every grade of guide plate inner cover 202 and pump shaft 20 between; Intermediate support 130 in the connecting tube 13 is provided with guide bearing 5 respectively with pump shaft 20; And also be provided with one respectively on the top of support sleeve on every grade of guide plate inner cover 202 and the guide bearing between the pump shaft 20 and get rid of husky ring 28; To prevent that effectively fine sand from getting between guide bearing 5 and the pump shaft 20, reduce the fault occurrence probability of rotor part, improve the life-span of pump shaft 20.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not with opposing qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (10)
1. house service pump that is used for nuclear power station; Comprise the pump housing, rotor part, machine seal apparatus, machine envelope flushing line and bearing part; The said pump housing comprises import loudspeaker, pump case, connecting tube, outlet bend pipe, pump seat, pump cover and motor cabinet; Said rotor part comprises pump shaft, impeller and impeller nut, it is characterized in that
Said pump case is by chopped-off head pump case group, secondary pump case group and the final stage pump case group of serial connection constitute successively from bottom to top; Each pump case group constitutes by connecting shell and being connected the blower inlet casing that connects the shell upper end; The lower end that said chopped-off head connects shell connects the import loudspeaker, and the upper end of said final stage blower inlet casing connects connecting tube;
The upper end of said connecting tube reaches the inner chamber middle part of said pump seat;
The upper end of said pump seat connects a mounting flange, and the outer of the upper-end surface of this mounting flange is convexly equipped with a retaining ring, and the wall top of this pump seat is offered a drain opening and outside this drain opening, connected a horizontal waste pipe;
Said outlet bend pipe is located in the inner chamber of said pump seat; Waterexit end and the lower end of this outlet bend pipe respectively with said pump seat on waste pipe and the upper end of said connecting tube be connected, it is one coaxial and with the last straight tube of diameter with said connecting tube that the tube wall top of this outlet bend pipe is provided with;
Said pump cover comprises that the adaptive regulating ring and of internal diameter that cover plate, is connected lower end surface and the external diameter and the said retaining ring of cover plate is positioned at regulating ring and coaxial and with the lower straighttube of diameter with the last straight tube on the said outlet bend pipe, and this pump cover is inserted in the retaining ring of said pump seat with said regulating ring and the last straight tube ways of connecting on said lower straighttube and the said outlet bend pipe is installed in the upper end of said pump seat;
Said motor cabinet, said pump cover and said pump seat are stacked successively from top to bottom and link together through some connecting bolts;
The bottom desired location of said pump shaft is provided with a shaft shoulder;
Said impeller comprises and is installed on the said pump shaft from bottom to top in the same way and is arranged in first stage impeller that said chopped-off head connects shell, is arranged in the secondary impeller of said secondary connection shell and is arranged in the impeller that said final stage connects shell;
Said impeller nut is installed in the lower end of said pump shaft;
Said first stage impeller is through being arranged on the lower end axle sleeve axially locating of said impeller nut upper end; Said secondary impeller and said impeller are respectively through being successively set on the middle axle sleeve and the lower end axle sleeve axially locating of said first stage impeller upper end and said secondary impeller upper end; Spacing between the said impeller and the said shaft shoulder through the upper end axle sleeve;
Said machine encapsulation is changed to integrated mechanical sealing, and this machine seal apparatus is installed on the pump shaft of said pump cover top;
Said machine envelope flushing line comprises inlet pipeline and rising pipe, and said inlet pipeline comprises that threeway, safety check and two ends that are connected the external water pipe of the water intake of machine sealing chamber body, are located on the external water pipe successively are connected to the interior water receiving pipe on the threeway and the pump housing; The two ends of said rising pipe are connected on the water outlet and pump hole of machine sealing chamber body;
Said bearing part comprise be located between said import loudspeaker and the pump shaft, the guide bearing between said chopped-off head pump case group and the pump shaft, between said secondary pump case group and the pump shaft, between said final stage pump case and the pump shaft.
2. the house service pump that is used for nuclear power station according to claim 1 is characterized in that,
Said blower inlet casing includes guide plate outer cover, guide plate inner cover and multi-disc guide plate; Said guide plate outer cover and guide plate inner cover constitute guide channel; Said multi-disc guide plate is dispersion shape and is distributed in the guide channel and with guide plate outer cover and guide plate inner cover and links into an integrated entity; The inner of said guide plate inner cover is provided with support sleeve, the import of said guide plate outer cover and the said outlet smooth transition that connects shell;
The import inwall of said connecting tube is up big and down small conical surface;
The outlet inwall of the outlet inwall of the guide plate outer cover of said chopped-off head blower inlet casing and the guide plate outer cover of said secondary blower inlet casing is up-small and down-big conical surface; The outlet inwall of the guide plate outer cover of said final stage blower inlet casing is the cylndrical surface, so that the import smooth transition of the outlet of the guide plate outer cover of said final stage blower inlet casing and connecting tube.
3. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, said machine seal apparatus comprises machine envelope axle sleeve, machine sealing chamber body, machine sealed cover, assembled plate, retainer, rotating ring, stationary ring and some springs, wherein,
The bottom of the outer circumferential face of said machine envelope axle sleeve is provided with an outer bulge loop, and the upper-end surface of this outer bulge loop is provided with some spring eyes with being uniformly distributed along the circumference, and this machine envelope axle sleeve is enclosed within on the said pump shaft regularly;
The top of the inner cavity surface of said machine sealing chamber body is provided with internal projecting ring, and the inner headed face of this internal projecting ring is up big and down small one-level ladder surface, and said machine sealing chamber body is installed on the said pump cover through a bearing support;
The bottom of the inner headed face of said machine sealed cover is provided with an outside ladder surface, and the ladder surface on this ladder surface and the said machine sealing chamber body is common to be constituted one annular groove is installed, and this machine sealed cover is connected the upper end of said machine sealing chamber body;
Said assembled plate is connected to the top of said machine envelope axle sleeve, so that said machine sealed cover and machine sealing chamber axon are to being fixed on the said pump housing;
Said stationary ring is inlaid in the installation annular groove of said machine sealed cover and machine sealing chamber body formation;
The centre of the inner cavity surface of said retainer is provided with a protruding dish; And the external diameter of the outer bulge loop on the interior circular diameter of this protruding dish bottom and the said machine envelope axle sleeve is adaptive; The interior circular diameter on this protruding dish top and the external diameter of said rotating ring are adaptive, and this retainer is positioned at the outer bulge loop of said machine envelope axle sleeve with protruding dish the mode of top can be installed on the said machine envelope axle sleeve with moving axially;
Said rotating ring is fixed in the inner chamber on protruding dish top of said retainer;
Said some springs are placed in the spring eye of said machine envelope axle sleeve one by one, and the upper end of these some springs is connected the lower end surface of the protruding dish of said retainer, so that fit slidably in the lower end surface of the upper-end surface of said rotating ring and said stationary ring.
4. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, the outside of the regulating ring of said pump cover also is provided with an adjustment pad between the lower end surface of the cover plate of the upper-end surface of the mounting flange of said pump seat and said pump cover.
5. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, the bottom of the outer circumferential face of said connecting tube is provided with a radial support flange.
6. the house service pump that is used for nuclear power station according to claim 1; It is characterized in that; The top of the outer circumferential face of said lower end axle sleeve is the little down big conical surface of, so that the wheel hub entrance point smooth transition of lower end axle sleeve and said first stage impeller, secondary impeller and impeller.
7. the house service pump that is used for nuclear power station according to claim 1; It is characterized in that; The lower end surface of said pump shaft is provided with a tapped blind hole coaxial with pump shaft; Said impeller nut is the covering cap shape nut, and the surperficial central authorities of its block offer a through hole, and said impeller nut passes through hole through one and is threaded in the lower end that lock screw in the tapped blind hole of said pump shaft is installed in said pump shaft.
8. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, said in the middle of between axle sleeve and the lower end axle sleeve, be provided with one respectively between said upper end bearing and the shaft shoulder and get rid of husky the ring.
9. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, also in the front and rear portions of said safety check one stop valve is set respectively on the external water pipe of said inlet pipeline; On the interior water receiving pipe of said inlet pipeline a stop valve is set.
10. the house service pump that is used for nuclear power station according to claim 1 is characterized in that, said connecting tube comprises the plurality of sections unit pipe and is connected the intermediate support between the two segment unit pipes, is respectively equipped with guide bearing between each intermediate support and the said pump shaft.
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| CN201210083448.5A CN102606540B (en) | 2012-03-27 | 2012-03-27 | Water pump for factory for nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210083448.5A CN102606540B (en) | 2012-03-27 | 2012-03-27 | Water pump for factory for nuclear power station |
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| CN102606540A true CN102606540A (en) | 2012-07-25 |
| CN102606540B CN102606540B (en) | 2014-04-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103075369A (en) * | 2013-01-23 | 2013-05-01 | 广州市昕恒泵业制造有限公司 | Combined vertical-type submerged long-shaft pump |
| CN107605791A (en) * | 2017-10-16 | 2018-01-19 | 上海阿波罗机械股份有限公司 | The mixed-flow pump of LNG receiving stations |
| CN108980054A (en) * | 2018-07-25 | 2018-12-11 | 成都西南水泵厂 | Vertical high-efficiency energy-saving automatic control self-priming scale pump |
| CN109983231A (en) * | 2016-11-22 | 2019-07-05 | 株式会社不二工机 | Draining pump |
| CN111980960A (en) * | 2020-07-31 | 2020-11-24 | 中核核电运行管理有限公司 | Water seal device for hydrodynamic pressure type main pump mechanical seal of nuclear power station |
| WO2021017354A1 (en) * | 2019-07-26 | 2021-02-04 | 烟台龙港泵业股份有限公司 | Symmetric type self-balancing central liquid outlet submerged pump device |
| CN114434110A (en) * | 2022-03-09 | 2022-05-06 | 哈尔滨电气动力装备有限公司 | Process method for processing and assembling shaft systems of shaft seal main pump of nuclear power station at same time |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106337820A (en) * | 2016-09-29 | 2017-01-18 | 上海阿波罗机械股份有限公司 | Water pump for nuclear power station plant |
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| WO2021017354A1 (en) * | 2019-07-26 | 2021-02-04 | 烟台龙港泵业股份有限公司 | Symmetric type self-balancing central liquid outlet submerged pump device |
| CN111980960A (en) * | 2020-07-31 | 2020-11-24 | 中核核电运行管理有限公司 | Water seal device for hydrodynamic pressure type main pump mechanical seal of nuclear power station |
| CN114434110A (en) * | 2022-03-09 | 2022-05-06 | 哈尔滨电气动力装备有限公司 | Process method for processing and assembling shaft systems of shaft seal main pump of nuclear power station at same time |
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