CN101555889A - High-pressure safety injection pump for nuclear power station - Google Patents
High-pressure safety injection pump for nuclear power station Download PDFInfo
- Publication number
- CN101555889A CN101555889A CNA200810035681XA CN200810035681A CN101555889A CN 101555889 A CN101555889 A CN 101555889A CN A200810035681X A CNA200810035681X A CN A200810035681XA CN 200810035681 A CN200810035681 A CN 200810035681A CN 101555889 A CN101555889 A CN 101555889A
- Authority
- CN
- China
- Prior art keywords
- pump
- safety injection
- injection pump
- pressure safety
- power station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A high-pressure safety injection pump relates to the main equipment of a return passage safety injection system of a nuclear power station. When middle or small crevasse water loss accident happens on a main return passage system of a nuclear reactor, the safety injection pump quickly starts and injects water into the nuclear reactor to prevent the accident being more serious and ensuring nuclear reactor safety. The high-pressure safety injection pump comprises an outer cylinder body, an inner shell component, a water inlet and outlet end cover, a two-end support bearing part, a base and corresponding connecting pipelines and is characterized in that the high-pressure safety injection pump is a horizontal type double-shell drawing core type multiple centrifugal pump, and the inlet and the outlet of the pump are vertically upwards. The high-pressure safety injection pump has reasonable structure and good thermal shock resistance and the hydraulic design and the strength design of the high-pressure safety injection pump fully satisfy the requirements for the nuclear power station safety injection system.
Description
Technical field
The present invention relates to a kind of pump, concrete a kind of used in nuclear power station that relates to is examined II level pump.
Background technique
Pressurized-water reactor nuclear power plant is the nuclear reaction power station of relatively extensively adopting at present, high-pressure safety injection pump is the capital equipment of nuclear power station one loop safety injection system, in the reactor main circuit system takes place, during small break LOCA, this pump promptly should start rapidly, water filling in reactor, to prevent the further expansion of accident, guarantee reactor safety.Pump is in operation the medium carried for being with radioactive boron water, and contains chips such as a small amount of concrete, thermal insulating material, coating.Pump can bear in ten seconds 5 ℃ to 127 ℃ thermal shock, at reactor pressure with in the process that slowly descends by rating value, can both water filling in reactor reliably.
Existing general service pump is in rigidity, intensity, heat shock resistance, the impurity of anti-working medium the and sealability, and the material behavior aspect all can't satisfy the requirement of nuclear power station high-pressure safety injection system.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of high-pressure safety injection pump for nuclear power station according to the needs of nuclear power station high-pressure safety injection system.
In order to address the above problem technological scheme of the present invention is such:
A kind of high-pressure safety injection pump for nuclear power station, form by outer cylinder body, inner housing assembly, water inlet and outlet end cap, two end supports bearing part, base and corresponding connecting pipeline, it is characterized in that described high-pressure safety injection pump is the Drawing-Core multistage centrifugal pump of horizontal bivalve body, the import of pump and outlet are vertically upward.
Described outer cylinder body is cylindrical forging, be connected with the import and export flange by bolt on the outer cylinder body, also be provided with an angle that is used to support on the ectosome, the outer cylinder body bottom has one makes its guide pad that is in the tram, and outer cylinder body can be along guide pad to one section stretching, extension during thermal shock.
Described inner housing assembly comprises: pump shaft, and inner housing protecgulum, inner housing bonnet, stator and impeller, described inner housing protecgulum, inner housing bonnet, stator and impeller etc. connect as one structure by ten rod bolts, and ten one-level impellers are arranged on the described pump shaft.
Described impeller is fixed on the pump shaft by key and location collar, has certain axial clearance between the adjacent impeller, makes when impeller is subjected to thermal shock, can expand vertically freely.
Described pump shaft two ends are provided with radial sliding bearing, are provided with a thrust-bearing at the water outlet end of pump shaft, and described thrust-bearing is a self oiling bearing.
Water intake side end at pump shaft is provided with the flexible laminated membrane coupling that is used to connect motor output shaft.
Described bearing part has the axle envelope, and the axle envelope is integrated mechanical sealing, and the axle envelope is connected with the heat exchanger that is used to cool off.The axle envelope adopts integrated mechanical sealing, and is provided with heat exchanger as cooling unit.
Being provided with the balancing drum that is used for balancing axial thrust near on the pump shaft of water outlet, have a balance cylinder behind the balancing drum, be provided with the balance return pipe in the balance cylinder, return pipe is connected to water intake.
Beneficial effect, high-pressure safety injection pump reasonable in design of the present invention, resistance to sudden heating is good, and waterpower design, Intensity Design satisfy the requirement of nuclear plant safety injecting systems fully.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of a kind of high-pressure safety injection pump for nuclear power station of the present invention;
Fig. 2 is that the A of Fig. 1 is to structural representation.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
High-pressure safe injection pump/motor unit is to use one of capital equipment in the PWR nuclear power plant safety injection system, and its function is as follows:
In reactor coolant loop takes place, when small break LOCA or steam line break accident, high-pressure safety injection pump puts into operation, and carries out following function;
At injection stage, will boron water piii reactor from material-changing water tank in, with the cooling of keeping reactor core and the reactivity that reduces reactor;
In the recirculation stage, by the front-mounted pump of residual heat removal pump as high-pressure safety injection pump, two series connections of pumps operation, and change by containment sump suction continuation water filling in reactor, exposed to prevent reactor core.
Environmental conditions
Ambient temperature: 5-50 ℃;
External pressure: 0.10MPa (definitely);
Relative moisture :≤80%;
Accumulative total radioactive dosage (40 years): 2 * 104Gy.
Working medium
Be with radioactive deionized water, wherein:
-boron content is (when nominal situation): 2000ppm;
-NaOH content:＜0.8%;
-medium proportion: 1000kg/m3.
When pump moves, also have following impurity in the working medium under the recirculation operating mode:
-concrete particle thing (0.5mm diameter) :≤60.0ppm;
-thermal insulating material particulate matter (6.35mm diameter) :≤20.0ppm;
-coating particles thing (6.35mm diameter) :≤12.0ppm.
Flow
Design discharge: 75
-1% + 5%M3/h;
Rated lift: 800m;
Peak rate of flow: 120m3/h;
Lift during peak rate of flow: 〉=420m;
Minimum discharge: 10m3/h;
(free from admixture moves more than 3 hours continuously);
Medium Maximum operating temperature: 127 ℃;
Revolution speed: 2960r/min;
The characteristic little according to the high-pressure safe injection pump duty, that lift is high, and for satisfying in ten seconds from the requirement of 5 ℃ to 127 ℃ thermal shock requirement and pump body dismounting time less than 24 hours, pump structure adopts double hulled Drawing-Core multistage centrifugal pump structure, inner housing can integral body be extracted out from cylindrical shell, and has a cover to be specifically designed to the special tool of dismounting.The rotating speed of pump is 2960rpm.The waterpower design guarantees its flow, the stable no hump that glides of head curve.
The structure explanation
High-pressure safety injection pump mainly is made up of outer cylinder body 1, inner housing assembly 2, water inlet and outlet end cap 3,4, bearings at both ends parts 5, base 6 and corresponding connecting pipeline.
The core bag of being made up of rotor part and inner shell member 2 is for can whole barrel-type structure of extracting out.All hydraulic pressure parts all are installed in the cylindrical shell of a forging, and the water inlet and outlet flange design is solid forging, all vertically upward.Cylindrical shell is supported on the base by four welding leg 7 thereon, and cylindrical shell can forever link to each other with feedwater piping, can not will during maintenance cylindrical shell pull down.The pump leg is a welded structure, and the cylindrical shell leg is fixed on the bearing with bolt, nut, butterfly spring circle and pump pin spacer sleeve.Between cylindrical shell suction side leg and pump holder load-carrying surface, lateral symmetry is equipped with positioning dowel, and cylindrical shell is remained on the suitable axial position.The feather key 8 that makes cylindrical shell be in the tram is arranged at the cylindrical shell bottom, and cylindrical shell can stretch to an end along feather key 8 during thermal expansion.
Inner shell member is inner housing protecgulum 9, stage casing 10, stator 11, final stage stator 12 etc., and the core bag by ten rod bolts 13 are formed with six cover special bolts and hexagonal socket nuts, is fixed on intake chamber and core bag on the cylindrical shell.Sealing between the stage casing compresses O type circle by the contact end face between the stage casing and reaches.Between housing protecgulum and cylindrical shell, all be lined with gasket seal between balance bush and the water outlet end cap.
Rotor part is supported by two radial sliding bearings, adopts thin oil lubricant, and the screw of adjusting the radial clearance between rotor and the stator is housed.
The end thrust of rotor, Equilibrator and a doubledirection thrust bearing of being made up of balancing drum and balance cover for seat come balance.The axle two ends respectively have a cover mechanical seal device 16, and the sealing cooling water is by cooler 22 cooling, cooling water by shaft sealing with small impeller constitute self-loopa.
The cylindrical shell two ends are sealed with suction side end cap 3 and outlet side end cap 4.16 main double-screw bolts of outlet side end cap 4 usefulness and mother nut connect with cylindrical shell, can tighten mother nut.All seal between end cap and the cylindrical shell with 4.5mm spiral seal pad.
Pump connects with adopting flexible laminated membrane coupling 17 connecting of motor shaft.
Thrust disc at the free end bearing parts 5 of pump has oil pump 18, pump when proper functioning, by thrust disc as oil pump to the bearing fuel feeding.
Equalization of discharge pipe 19 is housed on the rear shaft seal housing, links to each other with pump inlet 20, (balance cylinder's station location marker is wrong, should be marked near the balancing drum 16 after) draws the equilibrirm water from the balance cylinder 21.
Selecting for use of the structure of main parts size, Intensity Design and material
Because the medium that the high-pressure safe injection pump is carried is for being with radioactive boron water, and contain a small amount of concrete, thermal insulation layer is coated with impurity such as material debris, simultaneously, the inlet temperature of pump will be raised to 127 ℃ from 5 ℃ in ten times in second, so the material of choosing will have good wear resistance, choose the identical or essentially identical match materials of linear expansion coefficient.
Selecting for use of part material
A) because cylindrical shell will bear the high pressure stage high temperature of 13.5MPa, and bear thermal shock, consider the uniformity of thermal expansion, so it is cylindrical that barrel designs becomes, material adopts and forges, and imports and exports flange and is connected on the cylindrical shell by double-screw bolt, and pump barrel body leg is welded on the cylindrical shell central position, carry out x-ray inspection after the welding and carry out dye penetrant inspection, cylindrical shell carries out intensity by the ASTM standard and calculates.The material of cylindrical shell is an ASME SA-182F304L Austenitic Stainless Steel.
B) water outlet side end cap
The water outlet side end cap also will bear high pressure and high temperature and thermal shock, adopts and forges, and forging carries out ultrasonic flaw detection, carries out intensity by the ASME standard and calculates, and material adopts ASME SA-182 F304L Austenitic Stainless Steel.
C) influent side end cap
The influent side end cap adopts ASME SA-182 F304L forging.
D) rear shaft seal housing
The rear shaft seal housing adopts ASME SA-182 F304L forging.
E) main double-screw bolt
Carry out intensity by the ASME standard and calculate, part is done magnetic particle flaw detection, and material adopts high strength alloy steel 25Cr2MoV.
F) stage casing
Carry out the colouring check, carry out intensity by the ASME standard and calculate, material adopts 1Cr13.
G) inner housing protecgulum
Carry out the colouring check, material adopts ASME SA-182 F316L.
H) stator
Stator makes the import of the rate of discharge guiding next stage impeller of previous stage impeller, and the balance radial force, and stator adopts precision casting, and material adopts ASTM A743 CA-6NM.
I) impeller
For improving the degree of finish on impeller channel surface, to carry out precision casting, and impeller is made static balancing and dynamic balance test of rotor, material selection wear resistance and corrosion resistance be ASTM CA-40 preferably.
J) balancing drum
The axial force that the forward back of the balancing drum most of impeller of pressure balance produces is chosen less matching gap, with the control leakage rate, and carries out high frequency hardening to foreign round and handles.Hardness HRC=50～59, material selection 3Cr13 forging.
K) balance cover for seat
Adopt high-intensity 0Cr17Ni4Cu4Nb precipitation hardening steel.
L) axle
For improving the strength and stiffness of axle, the material of axle adopts the good 0Cr17Ni4Cu4Nb precipitation hardening steel of strength and stiffness.
M) seal ring
Material selection ASTM 440A, material heat-treat back hardness HRC=50～56, for reducing leakage rate, have more shallow circular groove on seal ring.
Consideration to thermal shock effect
When pump is changed when absorbing water in containment sump by material-changing water tank suction, the inlet temperature of pump will be converted to 127 ℃ by 5 ℃ in ten times in second, in the pump barrel body with the contacted part of medium with expanded by heating, because the linear expansion coeffcient difference of various materials and the difference of thermal capacity, each part will produce different swell incremenies, cause the variation of each component matching gap in the pump, bring difficulty for the safe operation of pump, therefore the identical or essentially identical match materials of alternative line expansion coefficient as far as possible when design, flow passage components all are axisymmetric solid of rotation, and carefully selected between each component parts matching gap, leave enough big gap at axial direction between the stage casing and the pump housing, the pump housing is connected with base, adopts fixing at the coupling end, the other end is structure slidably.
Selecting for use of bearing
Require the unit upper bearing (metal) should carry the pressure oil lubrication system on the specifications, need not the Lubricating-oil Station of outer fuel feeding, the radial bearing of pump and thrust-bearing are selected the radial bearing and the thrust-bearing of the selflubricating of Britain GLACIER company production for use, the lubricant oil of this bearing produces oil pressure by the impeller of thrust-bearing, oil is after supercooling, radially bearing and thrust-bearing are lubricated, and this structure just can be moved under the situation of the Lubricating-oil Station that does not have outer fuel feeding safely and reliably.
The axle envelope
A cover mechanical seal respectively is equipped with at the two ends of pump, the dynamic and static ring of mechanical seal selects for use impregnated graphite to cooperate with silicon carbide, show through a large amount of tests, this cooperation is comparatively ideal a kind of cooperation, two cover mechanical seals respectively have backup seal, when mechanical seal damaged, backup seal was devoted oneself to work, with the maximum leakage amount that guarantees mechanical seal less than 12m3/h.The self-loopa cooling is adopted in the cooling of mechanical seal, utilized the impeller that carries in the mechanical seal to carry out self-loopa, sealing water is by the cooler cooling of special use, and this sealing was carried out particular study and test and was tested and appraised.
The dismounting of inner housing and assembling
In 24 hours, finish the requirement of dismounting in order to satisfy pump inner core pulling assembly, to the assembling of inner housing and the special-purpose dismantling devices of two covers of having packed the cylindrical shell specialized designs into, inner housing can be assembled on the assembling frame of special use, pack into cylindrical shell and in cylindrical shell, dismantling of inner housing, designed special-purpose balladeur train, inner housing can be dismantled on balladeur train or the cylindrical shell of packing into easily.
The critical speed of rotation of rotor
The multistage centrifugal pump shaft generally all is designed to disturbing property axle according to characteristics, the aerial critical speed of rotation of rotor is lower than the working speed of pump, vibrate in order to prevent that pump is in operation, guarantee the safe operation of pump, must make the critical speed of rotation of pump avoid the working speed of pump, the aerial critical speed of rotation of rotor is about 1400r/min as calculated, consider the impeller seals hydrodynamic force and join the influence of the medium that shakes on every side, the critical speed of rotation of pump in real work is than improve about 2.5～4 times in air, for the critical speed of rotation of calculating pump in real work reliably, guarantee the safe operation of pump, my company carried out the test of simulation pump critical speed of rotation in the high-pressure safe injection pump of Qinshan first phase, and by the verification experimental verification computer program.
The technical order of motor
A) motor is a squirrel cage motor, security level IP34, type of cooling IC01, safety class IE level.
B) the bearings at both ends temperature measuring element is a WZPM-201 Pt100 end face thermal resistor.
C) bearing adopts single-row radial ball bearing 6318/C3, and lubricant oil adopts No. 32 steam turbine oils.
D) motor model: YKHD-290, power 290kW, voltage 6kV, rotating speed 2969rpm.
Vibration and elimination thereof
The reason that causes vibration is a lot, and the factor of existing rotating part has the factor of standing part again, in order to reduce vibration and to eliminate vibration as far as possible, takes following measure in design:
A) under the situation that does not influence hydraulic performance, increase the diameter of axle as far as possible, and the 0Cr17Ni4Cu4Nb material that adopts high strength and high rigidity, to improve the rigidity of axle.
B) rotor part and flexible laminated membrane coupling are made dynamic balance running respectively.Flexible laminated membrane coupling has weakening, vibration isolation effect.
C) machining accuracy of raising impeller ring and casing ring guarantees concentricity as far as possible, improves the hardness of seal ring material, to eliminate fricative off-centre.
D) rigidity of retaining elements such as the assurance pump housing, pump cover, base.
High-pressure safety injection pump reasonable in design of the present invention, resistance to sudden heating is good, and waterpower design, Intensity Design satisfy the requirement of nuclear plant safety injecting systems fully.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1, a kind of high-pressure safety injection pump for nuclear power station, form by outer cylinder body, inner housing assembly, water inlet and outlet end cap, two end supports bearing part, base and corresponding connecting pipeline, it is characterized in that described high-pressure safety injection pump is the Drawing-Core multistage centrifugal pump of horizontal bivalve body, the import of pump and outlet are vertically upward.
2, a kind of high-pressure safety injection pump for nuclear power station according to claim 1, it is characterized in that, described outer cylinder body is cylindrical forge piece, be connected with the import and export flange by bolt on the outer cylinder body, also be provided with an angle that is used to support on the outer cylinder body, the outer cylinder body bottom has one makes its guide pad that is in the tram, and outer cylinder body can be along guide pad to one section stretching, extension during thermal shock.
3, a kind of high-pressure safety injection pump for nuclear power station according to claim 1, it is characterized in that, described inner housing assembly comprises: pump shaft, inner housing protecgulum, inner housing bonnet, stator and impeller, described inner housing protecgulum, inner housing bonnet, stator and impeller etc. connect as one structure by ten rod bolts, and described pump shaft has ten one-level impellers.
4, a kind of high-pressure safety injection pump for nuclear power station according to claim 3, it is characterized in that described impeller is fixed on the pump shaft by key and location collar, has certain axial clearance between the adjacent impeller, make when impeller is subjected to thermal shock, can expand vertically freely.
5, a kind of high-pressure safety injection pump for nuclear power station according to claim 3 is characterized in that, described pump shaft two ends are provided with radial sliding bearing, is provided with a thrust-bearing at the water outlet end of pump shaft, and described thrust-bearing is designed to self oiling bearing.
6, a kind of high-pressure safety injection pump for nuclear power station according to claim 3 is characterized in that, is provided with the flexible laminated membrane coupling that is used to connect motor output shaft at the water intake side end of pump shaft.
7, a kind of high-pressure safety injection pump for nuclear power station according to claim 1 is characterized in that, described bearing part has the axle envelope, and the axle envelope is integrated mechanical sealing, and the axle envelope is connected with the heat exchanger that is used to cool off.
8, a kind of high-pressure safety injection pump for nuclear power station according to claim 7, it is characterized in that, having a balance cylinder behind the balancing drum being provided with the balancing drum that is used for balancing axial thrust near on the pump shaft of water outlet, be provided with the balance return pipe in the balance cylinder, return pipe is connected to water intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035681XA CN101555889A (en) | 2008-04-07 | 2008-04-07 | High-pressure safety injection pump for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035681XA CN101555889A (en) | 2008-04-07 | 2008-04-07 | High-pressure safety injection pump for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101555889A true CN101555889A (en) | 2009-10-14 |
Family
ID=41174126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810035681XA Pending CN101555889A (en) | 2008-04-07 | 2008-04-07 | High-pressure safety injection pump for nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101555889A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338126A (en) * | 2011-08-06 | 2012-02-01 | 河南兴发精细化工有限公司 | Application of deionized water in cooling chemical pump machine seal |
| CN105443399A (en) * | 2016-01-07 | 2016-03-30 | 上海电气凯士比核电泵阀有限公司 | Self-cooling electric auxiliary water feeding pump |
| CN108488074A (en) * | 2018-05-31 | 2018-09-04 | 合肥华升泵阀股份有限公司 | A kind of high lift two-stage Full-lining oil slurry pump of large high-temperature |
| CN109715954A (en) * | 2016-09-15 | 2019-05-03 | 西门子股份公司 | Single axle turbo-compressor |
| CN117646727A (en) * | 2024-01-29 | 2024-03-05 | 烟台恒邦泵业有限公司 | Vertical multistage magnetic drive pump |
-
2008
- 2008-04-07 CN CNA200810035681XA patent/CN101555889A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338126A (en) * | 2011-08-06 | 2012-02-01 | 河南兴发精细化工有限公司 | Application of deionized water in cooling chemical pump machine seal |
| CN105443399A (en) * | 2016-01-07 | 2016-03-30 | 上海电气凯士比核电泵阀有限公司 | Self-cooling electric auxiliary water feeding pump |
| CN109715954A (en) * | 2016-09-15 | 2019-05-03 | 西门子股份公司 | Single axle turbo-compressor |
| CN109715954B (en) * | 2016-09-15 | 2021-04-02 | 西门子股份公司 | Single-shaft type turbo compressor |
| US11286948B2 (en) | 2016-09-15 | 2022-03-29 | Siemens Energy Global GmbH & Co. KG | Single-shaft turbo compressor |
| CN108488074A (en) * | 2018-05-31 | 2018-09-04 | 合肥华升泵阀股份有限公司 | A kind of high lift two-stage Full-lining oil slurry pump of large high-temperature |
| CN117646727A (en) * | 2024-01-29 | 2024-03-05 | 烟台恒邦泵业有限公司 | Vertical multistage magnetic drive pump |
| CN117646727B (en) * | 2024-01-29 | 2024-04-16 | 烟台恒邦泵业有限公司 | Vertical multistage magnetic drive pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201187473Y (en) | Residual heat discharge pump for nuclear power station | |
| CN207406529U (en) | A kind of main pump bearing chamber lubrication oil circulation circuit | |
| CN101555889A (en) | High-pressure safety injection pump for nuclear power station | |
| CN102606484A (en) | Charging pump for nuclear power station | |
| CA2991126C (en) | Reactor coolant pump set | |
| CN103225624A (en) | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump | |
| CN202597113U (en) | Charging pump for nuclear power station | |
| CN205297940U (en) | On fill pump | |
| US20080159891A1 (en) | Pumping Device for Nuclear Facility | |
| CN103195759A (en) | Main feed pump | |
| CN205618367U (en) | Horizontal double -shell middling pressure safe injection pump | |
| CN105041463A (en) | Power output device of screw tube rotor engine | |
| CN105351207A (en) | Charging pump | |
| CN210317773U (en) | Vertical centrifugal pump for primary loop of lead-bismuth reactor | |
| Oguma et al. | Water Lubricated guide bearing with self-aligning segments | |
| CN111648977A (en) | Motor-driven auxiliary water supply steam-driven pump test system | |
| CN101555886A (en) | Containment spray pump for nuclear power station | |
| CN206311330U (en) | Bearing is lubricated under a kind of ring and receives oil test machine | |
| CN111828336A (en) | Ultra-silent zero-leakage nuclear main pump/fan compressor integrated design scheme | |
| CN220566280U (en) | Bearing box structure of multistage pump | |
| CN220487873U (en) | Rotor cooling structure of multistage pump | |
| Kunitomi et al. | Research and development for gas turbine system in GTHTR300 | |
| CN219953675U (en) | Pump door with high-strength erosion-resistant replaceable lining | |
| Kelly et al. | Development of a High Temperature Liquid Metal Turbopump | |
| Watterson | Rotating Equipment: Maintenance and Troubleshooting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20091014 |