CN203146341U - Novel 600MW supercritical unit starting pump - Google Patents
Novel 600MW supercritical unit starting pump Download PDFInfo
- Publication number
- CN203146341U CN203146341U CN 201320106005 CN201320106005U CN203146341U CN 203146341 U CN203146341 U CN 203146341U CN 201320106005 CN201320106005 CN 201320106005 CN 201320106005 U CN201320106005 U CN 201320106005U CN 203146341 U CN203146341 U CN 203146341U
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- supercritical unit
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Abstract
The utility model discloses a novel 600MW supercritical unit starting pump. The pump comprises a pump shell, a pump shaft and a multi-level impeller, wherein the pump shaft is arranged in the pump shell; and the multi-level impeller is fixedly arranged on the pump shaft. The pump is characterized in that a pair of sucking impellers are also arranged at the front end of the pump shaft which is provided with the multi-level impeller. The requirement on the net positive suction head at an inlet of a water pump is met, enough lift can be provided by the pump to satisfy start and a low-load running working condition, and the pump is simple in structure and convenient to maintain.
Description
Technical field
The utility model relates to a kind of startup pump, designs a kind of novel 600MW supercritical unit especially and starts pump.
Background technique
Because the needs of the electric power energy-saving of country consumption reduction, the 600MW supercritical unit generally adopts electronic startup feed water pump to realize the operating mode of boiler of power plant startup, debugging washing pipe, underrun at present.Electronic startup feed water pump to the smooth startup of unit, Economy, Security all tool have a significant impact.
Nearly all pump all can produce cavitation, because working pressure is low, causes the suction side vaporizing liquid, produces bubble, beats on blade, causes damage.The method that prevents has increased inlet pressure exactly.Can use suction booster, change setting height(from bottom) (generally all being positioned on ground floor), increase guide wheel, improve the blade profile design, improve blade material etc. mode and realize.
In the former project, as depicted in figs. 1 and 2, start pump basic configuration mode for adopting a front-mounted pump 1 and a feed water pump 2, respectively by motor driving, front-mounted pump 1 and feed water pump 2 are formed startup feed water pump group.Increase the inlet pressure that front-mounted pump 1 can improve main pump, prevent the main pump cavitation; The impeller of front-mounted pump 1 is selected double-entry impeller 3, can improve the anti-cavitation ability of front-mounted pump itself; The structure of feed water pump 2 is multistage centrifugal pump, mechanical seal, and rotating speed is 3000rpm, the first stage impeller of pump has adopted single suction impeller.
Above-mentioned startup feed water pump group can satisfy the needed duty parameter of power plant, but above-mentioned tradition starts the feed water pump group following shortcoming is arranged:
(1) system complex needs front-mounted pump, and every front-mounted pump also needs to be furnished with inlet screen and corresponding thermal technology's control instrument, and front-mounted pump connects to the pipeline that needs equivalent length between the feed water pump.
(2) lubricating oil system complexity and lubricants capacity are big, and oil system pipeline complexity is difficult to mounting arrangements.
(3) the shared factory building space of entire pump group is bigger, needs to increase the power plant construction cost.
(4) pump group efficient is low, and total motor power (output) is big, and house-service consumption increases.
(5) corollary equipment is many, and maintenance is complicated, and reliability of operation reduces.
In view of above shortcoming, design a kind of novel startup feed water pump that can satisfy the needed duty parameter of power plant and seem extremely important.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of novel 600MW supercritical unit to start pump, this startup pump had both satisfied the requirement of the net positive suction head of entrance of water-supplying pump, can make pump provide enough lifts to satisfy again and start and the underrun operating mode, and it is simple in structure, easy to maintenance.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
A kind of novel 600MW supercritical unit starts pump and comprises pump case, pump shaft and multi-stage impeller, and described pump shaft is arranged in the described pump case, and described multi-stage impeller is fixed on the pump shaft.It is characterized in that the front end that is provided with the described pump shaft of multi-stage impeller also is provided with a pair of phyllidium wheel.
After adopting the technological scheme of band double-entry impeller feed water pump, have following beneficial effect:
(1) this configuration only needs feed water pump and feed water pump motor, need not front-mounted pump and front-mounted pump motor.
(2) this scheme system is simple, need not front-mounted pump to the connecting tube between the feed water pump, has reduced resistance loss.
(3) manufacturing, buying, operating cost reduce, and power plant's operational reliability improves.
(4) efficient of pump group improves, and necessary electromotor power is little, can save the consumption of station service.
(5) the pump group accounts for the plant area minimizing, has saved the space, place of power plant.
(6) lubricants capacity tails off, and has reduced on-the-spot pipeline, makes site operation convenient.
Description of drawings
Fig. 1 is prior art front-mounted pump structural drawing;
Fig. 2 is the feed water pump structural drawing of single suction impeller for the prior art first stage impeller;
Fig. 3 is the structural drawing of double-entry impeller for the utility model first stage impeller.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 3,
A kind of novel 600MW supercritical unit starts pump and comprises pump case 6, pump shaft 7 and multi-stage impeller 8, and described pump shaft 7 is arranged in the described pump case 6, and described multi-stage impeller 8 is fixed on the pump shaft 7.The front end that is provided with the described pump shaft 7 of multi-stage impeller 8 also is provided with a pair of phyllidium wheel 5.
The utility model has at first carried out Selection and Design again to double-entry impeller 5, makes it can obtain good cavitation performance under the rotating speed of 3000rpm.
Then with the first stage impeller of this double-entry impeller 5 as novel feed water pump 4.Considered the intensity of axle during specific design, the stream compliance of inlet channel, the design experiences in conjunction with my company's product and boiler feed pump successfully is integrated into double-entry impeller in the feed water pump.
This startup pump had both satisfied the requirement of the net positive suction head of entrance of water-supplying pump, can make pump provide enough lifts to satisfy again and start and the underrun operating mode, and it is simple in structure, easy to maintenance.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. a novel 600MW supercritical unit startup pump comprises pump case, pump shaft and multi-stage impeller; Described pump shaft is arranged in the described pump case; Described multi-stage impeller is fixed on the pump shaft, it is characterized in that, the front end that is provided with the described pump shaft of multi-stage impeller also is provided with a pair of phyllidium wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320106005 CN203146341U (en) | 2013-03-07 | 2013-03-07 | Novel 600MW supercritical unit starting pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320106005 CN203146341U (en) | 2013-03-07 | 2013-03-07 | Novel 600MW supercritical unit starting pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146341U true CN203146341U (en) | 2013-08-21 |
Family
ID=48973871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320106005 Expired - Fee Related CN203146341U (en) | 2013-03-07 | 2013-03-07 | Novel 600MW supercritical unit starting pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146341U (en) |
-
2013
- 2013-03-07 CN CN 201320106005 patent/CN203146341U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ELECTRIC POWER CONSTRUCTION EQUIPMENT RESEAR Effective date: 20150519 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150519 Address after: 201316, Shanghai, Pudong New Area Airlines Road, No. 80 Patentee after: Shanghai Power Equipment Manufacture Co., Ltd. Patentee after: CHINA ELECTRIC POWER CONSTRUCTION GROUP EQUIPMENT INSTITUTE CO., LTD. Address before: 201316, Shanghai, Pudong New Area Airlines Road, No. 80 Patentee before: Shanghai Power Equipment Manufacture Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHINA POWER CONSTRUCTION GROUP ENERGY EQUIPMENT CO Free format text: FORMER NAME: SHANGHAI POWER BUILDING AND REPAIRING GENERAL FACTORY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201316, Shanghai, Pudong New Area Airlines Road, No. 80 Patentee after: POWERCHINA SPEM COMPANY LIMITED Patentee after: CHINA ELECTRIC POWER CONSTRUCTION GROUP EQUIPMENT INSTITUTE CO., LTD. Address before: 201316, Shanghai, Pudong New Area Airlines Road, No. 80 Patentee before: Shanghai Power Equipment Manufacture Co., Ltd. Patentee before: CHINA ELECTRIC POWER CONSTRUCTION GROUP EQUIPMENT INSTITUTE CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20170307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |