CN202946437U - Second-generation nuclear primary pump thrust bearing oil impeller - Google Patents
Second-generation nuclear primary pump thrust bearing oil impeller Download PDFInfo
- Publication number
- CN202946437U CN202946437U CN 201220686149 CN201220686149U CN202946437U CN 202946437 U CN202946437 U CN 202946437U CN 201220686149 CN201220686149 CN 201220686149 CN 201220686149 U CN201220686149 U CN 201220686149U CN 202946437 U CN202946437 U CN 202946437U
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- blade
- wheel hub
- bearing oil
- hub
- oil impeller
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Abstract
The utility model relates to a second-generation nuclear primary pump thrust bearing oil impeller. The second-generation nuclear primary pump thrust bearing oil impeller comprises a pair of axial spiral straight blades (1) which are evenly distributed on the circumference; the blades (1) are inlets without angles of attack; the front end (2) of the blade (1) is in smooth transition to the rear end (6) of an axial-flow type blade (1) at the rear end (6) in an inducer manner; the wrap angle of a rim (9) of the blade is about 240 degrees; the wrap angle at the inner edge (11) of the blade (1) is about 225 degrees; the thickness of the blade (1) is small and smaller than 5mm; the outlet (10) of a hub (7) adopts circular arc transition to form a 90-degree bent runner; a mechanical sealing positioning screw hole (8) is designed at the outer edge of the hub (7); a mechanical sealing assembly step (3) is arranged at the inner side of the hub (7); eight radial inclined holes (12) which are evenly distributed on the circumference are designed near the outlet (10) of the hub (7); and 16 mounting screw holes (4) which are distributed on the circumference, and four jack screw holes (5) for dismantling are arranged at the upper end face of the hub (7). The cavitation characteristics of the pump can be obviously improved; and the vacuum degree (HS is approximately equal to 0.5m) is reduced. Thus, the height demand of working oil level of a bearing housing is reduced, so as to achieve the target of reducing the total height of a reactor coolant pump.
Description
Technical field: invention related to for two generations and adds main pump thrust-bearing oil impeller.
Background technique: two generation modified model shaft seal main pump be widely used in the main pump type of pressurized-water reactor nuclear power plant all over the world.The thrust-bearing of this type main pump all is positioned at the pressure-bearing boundary outside and adopts oil lubrication and cooling.Early stage main pump and main pump motor bearing need external oil feed pump that circulating lubricating oil is provided, and oil supplying device is complicated, and maintenance task is heavy.
Summary of the invention: the purpose of this utility model is to provide a kind of Cavitation Characteristics that can significantly improve pump, reduces suction vacuum, and two generations of improving the operation stability of main pump bearing oil system add core main pump thrust-bearing oil impeller.The technical solution of the utility model is: in a kind of two generations, add core main pump thrust-bearing oil impeller, has the spiral prismatic blade of axial class (1) of a pair of circumference uniform distribution; Blade (1) is without angle of attack import, the rear end (6) of the blade (1) of the front end (2) of blade (1) from inducer form smooth transition to axial flow, blade (1) cornerite is large, approximately 240 ° of the wheel rim of blade (9) cornerites, the cornerite that blade (1) inner edge (11) is located is 225 °, blade (1) thin thickness, and thickness is less than 5mm; The outlet (10) of wheel hub (7) end adopts arc transition, and circular arc forms 90 ° of curved runners, two generations utilize when adding core main pump thrust-bearing oil impeller operation this runner with fluid to radially extruding; Wheel hub (7) outer rim is designed with mechanical seal positioning screw hole (8), and there is mechanical seal assembling step (3) wheel hub (7) inboard; Wheel hub (7) outlet (10) has designed radially inclined hole (12) of eight circumference uniform distributions near locating, two generations utilize when adding core main pump thrust-bearing oil impeller operation centrifugal action with fluid from the interior side direction wheel hub of wheel hub (7) (7) external circumferential sucking-off; There are mounting screw hole (4) and four top wire holes (5) that are used for dismounting of 16 circle distribution wheel hub (7) upper-end surface.
The technological merit of this product invention is:
1. the evidence inducer that has a small inlet angle of attack can improve the anti-cavitation erosion ability of main impeller, and this oily impeller adopts without inlet incidence angle, and blade can significantly improve the Cavitation Characteristics of pump by the runner design of inducer section smooth transition, reduces suction vacuum (H
S≈ 0.5m), thereby reduced bearing chamber work oil level requirement for height, to reach the purpose that reduces the reactor coolant pump total height.
2. the utility model oil impeller height is little, and height diameter ratio only approximately 0.2 has been saved the installing space of reactor coolant pump preciousness.
3. the blade of the utility model oil impeller adopts little laying angle, double-leaf (low cascade solidity), large cornerite design, flow-the heat-capacity curve that has steady decline, for the sealing of oil machine tool provides stable working pressure, improved the operation stability of main pump bearing oil system under the prerequisite of the flow that guarantees to provide enough for system.
4. the utility model oil impeller inside can integrated oily mechanical seal assembly, and packing and the whole quick assembling of main pump section cover is convenient in this modular design, reduced nuclear power station site examining and repairing maintenance time.
5. the utility model oil impeller outlet end wheel hub is provided with eight inclined holes (12), with oil machine tool sealed high pressure side UNICOM, utilizes the rotating centrifugal of inclined hole to act as the sealing of oil machine tool cool stream is provided, and need not provides cooling in addition.
Description of drawings:
Fig. 1 oil impeller shaft mapping
Fig. 2 oil impeller worm's eye view
Fig. 3 oil impeller sectional drawing
Fig. 4 oil impeller blade is located unfolded drawing at wheel rim (D) and wheel hub (dh)
Fig. 5 oil Impeller Design parameter list
Embodiment: in a kind of two generations as shown in Figure 1, add core main pump thrust-bearing oil impeller, has the spiral prismatic blade 1 of axial class of a pair of circumference uniform distribution; Blade 1 is without angle of attack import, the rear end 6 of the blade 1 of the front end 2 of blade 1 from inducer form smooth transition to axial flow, and blade 1 cornerite is large, approximately 240 ° of wheel rim 9 cornerites of blade, the cornerite at blade 1 inner edge 11 places is 225 °, blade 1 thin thickness, thickness is less than 5mm; Outlet 10 ends of wheel hub 7 adopt arc transition, and circular arc forms 90 ° of curved runners, two generations utilize when adding core main pump thrust-bearing oil impeller operation this runner with fluid to radially extruding; As shown in Figure 2, wheel hub 7 outer rims are designed with mechanical seal positioning screw hole 8, and there is mechanical seal assembling step 3 wheel hub 7 inboards; Designed near wheel hub 7 outlet 10 places eight circumference uniform distributions utilize when radially 12, two generations of inclined hole add core main pump thrust-bearing oil impeller operation centrifugal action with fluid from the interior side direction wheel hub 7 external circumferential sucking-offs of wheel hub 7; There are mounting screw hole 4 and four top wire holes 5 that are used for dismounting of 16 circle distribution wheel hub 7 upper-end surfaces.
Described blade 1 is 90 ° of prismatic blades, and as shown in Figure 4, the circumferentially deploying figure of blade 1 is shown as without inlet incidence angle, approximately 240 ° of blade 1 outer rim cornerites, and approximately 225 ° of blade 1 inner edge cornerites, blade 1 even thickness, thickness are 4mm.
Claims (2)
1. in a generation, add core main pump thrust-bearing oil impeller, it is characterized in that: the spiral prismatic blade of axial class (1) that has a pair of circumference uniform distribution; Blade (1) is without angle of attack import, the rear end (6) of the blade (1) of the front end (2) of blade (1) from inducer form smooth transition to axial flow, blade (1) cornerite is large, the wheel rim of blade (9) cornerite is 240 °, the cornerite that blade (1) inner edge (11) is located is 225 °, blade (1) thin thickness, and thickness is less than 5mm; The outlet (10) of wheel hub (7) end adopts arc transition, and circular arc forms 90 ° of curved runners, two generations utilize when adding core main pump thrust-bearing oil impeller operation this runner with fluid to radially extruding; Wheel hub (7) outer rim is designed with mechanical seal positioning screw hole (8), and there is mechanical seal assembling step (3) wheel hub (7) inboard; Wheel hub (7) outlet (10) has designed radially inclined hole (12) of eight circumference uniform distributions near locating, two generations utilize when adding core main pump thrust-bearing oil impeller operation centrifugal action with fluid from the interior side direction wheel hub of wheel hub (7) (7) external circumferential sucking-off; There are mounting screw hole (4) and four top wire holes (5) that are used for dismounting of 16 circle distribution wheel hub (7) upper-end surface.
2. in a kind of two generations according to claim 1, add core main pump thrust-bearing oil impeller, and it is characterized in that: the circumferentially deploying figure of described blade (1) is shown as without inlet incidence angle, blade (1) even thickness, and thickness is 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686149 CN202946437U (en) | 2012-12-13 | 2012-12-13 | Second-generation nuclear primary pump thrust bearing oil impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220686149 CN202946437U (en) | 2012-12-13 | 2012-12-13 | Second-generation nuclear primary pump thrust bearing oil impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946437U true CN202946437U (en) | 2013-05-22 |
Family
ID=48422143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220686149 Withdrawn - After Issue CN202946437U (en) | 2012-12-13 | 2012-12-13 | Second-generation nuclear primary pump thrust bearing oil impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016392A (en) * | 2012-12-13 | 2013-04-03 | 哈尔滨电气动力装备有限公司 | Oil impeller for thrust bearing of second-generation reactor coolant pump |
-
2012
- 2012-12-13 CN CN 201220686149 patent/CN202946437U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016392A (en) * | 2012-12-13 | 2013-04-03 | 哈尔滨电气动力装备有限公司 | Oil impeller for thrust bearing of second-generation reactor coolant pump |
| CN103016392B (en) * | 2012-12-13 | 2015-05-13 | 哈尔滨电气动力装备有限公司 | Oil impeller for thrust bearing of second-generation reactor coolant pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130522 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |