CN106286409A - Axle Feng Shihe main pump heat screen system and device - Google Patents
Axle Feng Shihe main pump heat screen system and device Download PDFInfo
- Publication number
- CN106286409A CN106286409A CN201610911174.2A CN201610911174A CN106286409A CN 106286409 A CN106286409 A CN 106286409A CN 201610911174 A CN201610911174 A CN 201610911174A CN 106286409 A CN106286409 A CN 106286409A
- Authority
- CN
- China
- Prior art keywords
- axle
- runner
- baffle pipe
- sleeve
- main pump
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of axle Feng Shihe main pump heat screen system and device, there is simple in construction, easily install, parts thermal deformation is little, the feature such as need not weld, major function is by lower pump shaft (20), three-level fluid dynamic pressure mechanical seal (21) and lower guide bearing (18) and internal pump components are maintained at lower temperature, the present invention is in addition to ensureing the heat insulating function under main pump nominal situation, also can take into account under main pump accident conditions, i.e. axle envelope is injected water and is broken the insulation requirement missed the season, reduce the heat transfer speed under accident conditions, prevent the crackle that lower pump shaft (20) causes because the drastically change generation thermal stress of temperature is excessive, recovery for fault gains time.Described heat screen system and device, insulator (6) in employing, lower insulator (3) solid-state are heat insulation, two runners in parallel are formed by interior baffle pipe (13) and outer baffle pipe (15), by the control to two flow passage resistances in parallel, it is achieved the insulation requirement under nominal situation and accident conditions.
Description
Technical field: the present invention relates to a kind of axle Feng Shihe main pump heat screen system and device.
Background technology: reactor coolant pump, i.e. core main pump, the reactor coolant fluid temperature (F.T.) of its transport is the highest by (290
DEG C), when reactor coolant is by pump inner flow passage, meeting transfers heat to the solid contacted therewith in heat convection mode
Circumference, and gradually transmit to low temperature part with the heat transfer type such as heat conduction, radiation, so that blade, three-level fluid dynamic pressure machinery are close
The envelope part temperatures such as (21) and lower pump shaft (20) raises, as taken no action to be taken away by this partial heat, along with amassing of heat
Tired and upwards conduct, three-level fluid dynamic pressure mechanical seal (21) can be too high and lost efficacy due to temperature, and another aspect, due to main method
Between orchid and heat shielding, the pressure drop of cavity zone is less than RCP device pressure, and once axle envelope injects the forfeiture of water, and reactor can be caused cold
But agent flows up in pump case, and final three-level fluid dynamic pressure mechanical seal (21) can be too high and lost efficacy due to temperature, thus leads
Causing reactor coolant leakage, environmental radiation pollutes, and lower pump shaft (20) can produce because the drastically change of temperature produces thermal stress
Crackle, fatigue is received a mandate and is greatly lowered.So the design of place's heat screen must is fulfilled for two operating modes, i.e. axle envelope injection water normally supplies
At once, prevent the heat three-level fluid dynamic pressure mechanical seal (21) to low temperature and lower pump shaft (20) transmission, and when axle envelope injects water
Disconnected miss the season, delay lower pump shaft (20) and three-level fluid dynamic pressure mechanical seal (21) be rapidly heated, improve the fatigue of lower pump shaft
In the life-span, the reply for fault gains time.
At present, heat screen is designed to multistory steel structure more, by the space between multiple structure, according to reflected radiation heat and
The principle of jacket gas thermal resistance reaches effect of heat insulation.Meanwhile, for strengthen heat exchange, use more add on cylinder regular pit or
The structures such as projection, to increase heat transfer area, strengthen effect of heat insulation.Owing to the effect of heat screen described herein is to control core main pump
Internal structure is in using temperature range.According to above-mentioned conventional design, though conventional working condition requirement can be met, spy cannot be met
Determine accident conditions, i.e. main pump injects water in axle envelope and breaks the insulation requirement missed the season.
Summary of the invention: it is an object of the invention to open a kind of axle Feng Shihe main pump heat screen system and device, there is structure
Simply, easily installing, parts heat diminishes, and the feature such as need not weld, and in addition to ensureing the heat insulating function under main pump nominal situation, also may be used
The crackle preventing lower pump shaft (20) from causing because the drastically change generation thermal stress of temperature is excessive, increases lower guide bearing (18) tired
Life-span, and gain time for the recovery of fault.The technical scheme is that insulator (6) and lower insulator (3) pass through spiral shell
Nail (4) connects into an insulating assembly, and insulating assembly is fixedly installed to stator (2) by straight pin (5) and socket head screw
On, and be pressed in closed chamber (10) by screw (7) locking dress, above prop up stay tube (16), outer baffle pipe (15) and interior baffle pipe
(13) it is chained together by hex head screw (14), above props up stay tube (16) and be fastened to down a stay tube (1) by hex head screw
On, lower stay tube (1) is installed on lower guide bearing (18) by straight pin (19), installs between axle sleeve (17) and lower pump shaft (20)
Feather key (8), swivel plate butterfly spring (12) is placed on rotating spring sleeve (9), rotating spring sleeve (9) be placed in axle sleeve (17) it
On, rotating spring sleeve (9) and axle sleeve (17) are pressed on lower pump shaft as position compensation parts by swivel plate spring (12)
(20) on step, swivel plate spring (12), turnbarrel (9), axle sleeve (17) and lower pump shaft (20) rotary motion together.
The operation principle of the present invention is: axle envelope is injected water and is divided into two strands of routes in parallel when flowing through heat screen system and device
Flowing, parallel fluid flow follows the principle that overall presure drop is equal, by the control of the control realization assignment of traffic to two flow path resistances
System, baffling runner (22) (see Fig. 2) flow resistance is little, and distribution flow is big, and runner (23) (see Fig. 2) flow resistance is big, and distribution flow is little.Work as axle
When envelope injection water supply is normal, the baffling runner (22) that baffle pipe is formed there is no necessity of absolute existence, but, when axle envelope is injected
Water is disconnected misses the season, pyroreaction reactor coolant (abbreviation high-temperature water) by lower guide bearing (18) countercurrently, now due to parallel flow paths and
Baffling runner (22) flow resistance is little, the design that runner (23) flow resistance is big, makes more high-temperature water flow to baffling runner (22), less
High-temperature water flows to runner (23), and the high-temperature water of relatively various flow forms buffering in baffling runner (22), and heat transfer speed subtracts significantly
Slowly, less flow high-temperature water flows through the runner (23) near lower pump shaft (20) place, reduces lower pump shaft (20) thermograde, reduces heat
Stress.
The technological merit of the present invention is:
1, upper insulator (6) is designed to irregular revolving body, in the way of heat conduction with the geometry of lower insulator (3)
Controlling heat to transmit to low-temperature region, the mutually card slot type design of upper insulator (6) and lower insulator (3), cooperation face is left necessarily
Amount gap, on the one hand facilitates location and installation, on the other hand prevents the material distortional stress caused due to parts thermal expansion.
2, mounting structure two runners of formation of heat shielding system: interior baffle pipe (13) and outer baffle pipe (15) and upper stay tube
(16) forming baffling runner (22) (see Fig. 2) together, the gap between interior baffle pipe (13) and axle sleeve (17) forms (runner 23)
(see Fig. 2), the passage in lower stay tube (1) of baffling runner (22) tailing edge converges, so at interior baffling with runner (23) flowing
Pipe (13) both sides just form parallel fluid flow, therefore overall presure drop equal principle is followed in flowing, thus can be by hindering the flowing of two streams
The control of the control realization assignment of traffic of power.
3, the circulation passage between interior baffle pipe (13) and axle sleeve (17), i.e. runner (23) (see Fig. 2), is designed to small-gap suture
Passage (only 1mm), and interior baffle pipe (13) is designed to a series of sudden expansion, sudden contraction ring cavity group groove, on the one hand increases runner
(23) flow resistance, on the other hand increases heat exchange area, strengthens the heat transfer effect at (23) place.
What 4, the circulation area of runner (22) will be big than runner (23) is many, so that the flow resistance of runner (23) is much larger than
The flow resistance of stream (22), therefore due to the design of parallel-connection structure, under any operating mode, all can make more flux and flow direction runner
(22)。
5, axle sleeve (17) is arranged on lower pump shaft (20), and axle sleeve (17) forms contact surface with lower guide bearing (18).Pass through axle
Set (17), is possible to prevent lower pump shaft (20) to be worn, and meanwhile, in the case of lower guide bearing (18) damages, whole pump shaft system is also
Without changing.
6, the correct installation site of axle sleeve (17) is ensured by swivel plate spring (12), swivel plate spring (12) conduct
Axle sleeve (17) is pressed on the step of lower pump shaft (20) by one position compensation parts.
7, main shaft seal assembly (21) lower end press-fits a rotating spring sleeve (9) (single-piece figure is shown in Fig. 3), rotating spring set
Cylinder (9) Excircle machining 10 launches helix, rotation direction dextrorotation, and when axle envelope injection water supply is normal, the rotation direction of helixseal is axle
Envelope injects water provides power, relatively large number of axle envelope is injected Chiragra Spider Conch rotation and flows to the baffling runner (22) of heat shielding system, strengthen
Lower insulator (3) that heat-exchange temperature is higher and upper insulator (6) part.And when axle envelope is injected, water is disconnected misses the season, the high temperature of major loop
Water can prolong in two runners that the gap of lower guide bearing (18) and axle sleeve (17) enters heat shielding system from bottom to top, now rotating spring
The thread rotary orientation of sleeve (9) cylindrical will affect fluid flow direction, taking back high-temperature water in heat shielding system runner, thus prevent
High-temperature water enters three-level fluid dynamic pressure mechanical seal (21) heat damage that three-level fluid dynamic pressure mechanical seal (21) causes.
The functional advantage that more than design structure realizes is:
When axle envelope injects water regular supply, diffuser (2) side contacts with 290 DEG C of high-temperature water, and temperature is higher, and main turn
Moving axis (20) side temperature is relatively low, therefore owing to injecting the design of cooling water flow conduits parallel-connection structure and the control to two flow passage resistances
System, the larger flow making axle envelope inject water flows to runner (22) as in figure 2 it is shown, to strengthen the higher upper insulator of chilling temperature
(6), lower insulator (3) assembly side so that the distribution of heat shielding system temperature is more uniform, prevent hot-spot.
When break down operating mode time, i.e. axle envelope injects that water is disconnected misses the season, and major loop high-temperature water can prolong lower guide bearing (18) and axle
The gap of set (17) enters in two runners of heat shielding system, and the at this moment parallel-connection structure design of this patent will make the 290 of less flow
DEG C high-temperature water flows upwardly toward runner (23), as in figure 2 it is shown, more flux and flow direction runner (22), on the one hand slows down lower pump shaft (20)
Be brought rapidly up, on the other hand reduce thermal stress, improve lower pump shaft (20) fatigue life, set due to the baffling flowing of runner (22)
Meter, extends heat transfer time, thus prevents lower pump shaft from recovering to gain time.
As it is shown on figure 3, the design of rotating spring sleeve (9) and application realize when axle envelope injection water supply is normal, for axle
Seal and water offer power is provided, break at axle envelope injection water and miss the season, block the high-temperature water main three-level fluid dynamic pressure mechanical seal of entrance (21)
System, prevents three-level fluid dynamic pressure mechanical seal (21) heat damage.
Accompanying drawing illustrates:
Fig. 1 axle Feng Shihe main pump heat shielding system and device profile
Fig. 2 heat shielding system runner figure
Fig. 3 rotatory sealing sleeve profile
Detailed description of the invention:
As it is shown in figure 1, a kind of axle Feng Shihe main pump heat screen system and device, upper insulator 6 passes through spiral shell with lower insulator 3
Nail 4 connects into an insulating assembly, and insulating assembly is fixedly installed on stator 2 by straight pin 5 and socket head screw, and leads to
Cross screw 7 to lock dress and be pressed in closed chamber 10, above prop up stay tube 16, outer baffle pipe 15 and interior baffle pipe 13 by hex head screw 14
Being chained together, above prop up stay tube 16 and be fastened to down on a stay tube 1 by hex head screw, lower stay tube 1 is blocked by straight pin 19
Being contained on lower guide bearing 18, install feather key 8 between axle sleeve 17 and lower pump shaft 20, swivel plate butterfly spring 12 is placed in rotating spring sleeve
On 9, rotating spring sleeve 9 is placed on axle sleeve 17, swivel plate spring 12 as position compensation parts by rotating spring
Sleeve 9 and axle sleeve 17 are pressed on the step of lower pump shaft 20, with realize swivel plate spring 12, turnbarrel 9, axle sleeve 17 and
The rotary motion together of lower pump shaft 20.
As in figure 2 it is shown, axle envelope injects water will be divided into two bursts of path flows, interior baffling when flowing through heat screen system and device
Pipe 13 is connected in series in forming baffling runner 22 with outer baffle pipe 15 and a upper stay tube 16, between interior baffle pipe 13 and axle sleeve 17 between
Gap forms runner 23, and the baffling runner 22 passage along lower stay tube 1 converges with runner 23, and interior baffle pipe 13 is sudden expansion, sudden contraction
Ring cavity group groove structure.
Three-level fluid dynamic pressure mechanical seal 21 lower end press-fits a rotating spring sleeve 9, as it is shown on figure 3, rotating spring set
Cylinder 9 Excircle machining launches helix, and rotating spring sleeve 9 moves with lower pump shaft 20 rotating Vortex.
Claims (3)
1. an axle Feng Shihe main pump heat screen system and device, is characterized in that: upper insulator (6) passes through with lower insulator (3)
Screw (4) connects into an insulating assembly, and insulating assembly is fixedly installed to stator by straight pin (5) and socket head screw
(2) on, and it is pressed in closed chamber (10) by screw (7) locking dress, above props up stay tube (16), outer baffle pipe (15) and interior baffle pipe
(13) it is chained together by hex head screw (14), above props up stay tube (16) and be fastened to down a stay tube (1) by hex head screw
On, lower stay tube (1) is installed on lower guide bearing (18) by straight pin (19), installs between axle sleeve (17) and lower pump shaft (20)
Feather key (8), swivel plate butterfly spring (12) is placed on rotating spring sleeve (9), rotating spring sleeve (9) be placed in axle sleeve (17) it
On, rotating spring sleeve (9) and axle sleeve (17) are pressed on lower pump shaft as position compensation parts by swivel plate spring (12)
(20) on step, swivel plate spring (12), turnbarrel (9), axle sleeve (17) and lower pump shaft (20) rotary motion together.
A kind of axle Feng Shihe main pump heat screen system and device the most according to claim 1, is characterized in that: axle envelope injects water
Two bursts of path flows, interior baffle pipe (13) and outer baffle pipe (15) and upper support will be divided into when flowing through heat screen system and device
Pipe (16) is connected in series in forming baffling runner (22), and the gap between interior baffle pipe (13) and axle sleeve (17) forms runner (23),
The baffling runner (22) passage along lower stay tube (1) converges with runner (23), and interior baffle pipe (13) is sudden expansion, sudden contraction ring cavity group
Groove structure.
Axle Feng Shihe main pump heat shielding system the most according to claim 1, is characterized in that: three-level fluid dynamic pressure mechanical seal
(21) lower end press-fits a rotating spring sleeve (9), and rotating spring sleeve (9) Excircle machining launches helix, rotating spring set
Cylinder (9) moves with lower pump shaft (20) rotating Vortex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911174.2A CN106286409A (en) | 2016-10-19 | 2016-10-19 | Axle Feng Shihe main pump heat screen system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911174.2A CN106286409A (en) | 2016-10-19 | 2016-10-19 | Axle Feng Shihe main pump heat screen system and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106286409A true CN106286409A (en) | 2017-01-04 |
Family
ID=57718832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610911174.2A Pending CN106286409A (en) | 2016-10-19 | 2016-10-19 | Axle Feng Shihe main pump heat screen system and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106286409A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120314A (en) * | 2017-06-02 | 2017-09-01 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump pumping chamber |
| CN109779918A (en) * | 2019-01-25 | 2019-05-21 | 中科瑞华（安徽）中子能源技术有限公司 | A kind of small-sized lead base reactor pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230600A (en) * | 1984-05-01 | 1985-11-16 | Hitachi Ltd | Shaft sealing mechanism provided with mechanical seal |
| CN102777423A (en) * | 2012-08-27 | 2012-11-14 | 哈尔滨电气动力装备有限公司 | Hydraulic part of 300MW reactor coolant pump |
| CN202732479U (en) * | 2012-08-27 | 2013-02-13 | 哈尔滨电气动力装备有限公司 | 300MW reactor coolant pump hydraulic part |
| CN203892228U (en) * | 2014-04-04 | 2014-10-22 | 哈尔滨电气动力装备有限公司 | Bearing guide ring structure of main pump assembly of 300MW nuclear reactor coolant pump |
| CN206280306U (en) * | 2016-10-19 | 2017-06-27 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump heat screen system and device |
-
2016
- 2016-10-19 CN CN201610911174.2A patent/CN106286409A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60230600A (en) * | 1984-05-01 | 1985-11-16 | Hitachi Ltd | Shaft sealing mechanism provided with mechanical seal |
| CN102777423A (en) * | 2012-08-27 | 2012-11-14 | 哈尔滨电气动力装备有限公司 | Hydraulic part of 300MW reactor coolant pump |
| CN202732479U (en) * | 2012-08-27 | 2013-02-13 | 哈尔滨电气动力装备有限公司 | 300MW reactor coolant pump hydraulic part |
| CN203892228U (en) * | 2014-04-04 | 2014-10-22 | 哈尔滨电气动力装备有限公司 | Bearing guide ring structure of main pump assembly of 300MW nuclear reactor coolant pump |
| CN206280306U (en) * | 2016-10-19 | 2017-06-27 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump heat screen system and device |
Non-Patent Citations (1)
| Title |
|---|
| 冯晓东等: "CNP1000轴封式核主泵技术", 《排灌机械工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120314A (en) * | 2017-06-02 | 2017-09-01 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump pumping chamber |
| CN109779918A (en) * | 2019-01-25 | 2019-05-21 | 中科瑞华（安徽）中子能源技术有限公司 | A kind of small-sized lead base reactor pump |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
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| WD01 | Invention patent application deemed withdrawn after publication |