CN210889042U - Steam extraction back pressure type water feeding pump small steam turbine system with high-efficiency hydraulic speed regulating device - Google Patents
Steam extraction back pressure type water feeding pump small steam turbine system with high-efficiency hydraulic speed regulating device Download PDFInfo
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- CN210889042U CN210889042U CN201921296605.4U CN201921296605U CN210889042U CN 210889042 U CN210889042 U CN 210889042U CN 201921296605 U CN201921296605 U CN 201921296605U CN 210889042 U CN210889042 U CN 210889042U
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Abstract
The utility model relates to a steam extraction back pressure type water feeding pump small turbine system with a high-efficiency hydraulic speed regulating device, which comprises a steam extraction back pressure type water feeding pump small turbine, a high-efficiency hydraulic speed regulating device, a water feeding pump, a small power balance generator and a main turbine; an output shaft at one end of the small steam turbine is connected with the high-efficiency hydraulic speed regulating device, and an output shaft at the other end of the small steam turbine is connected with an input shaft of the small power balance generator; the high-efficiency hydraulic speed regulating device is connected with a water feeding pump, and the main steam turbine is connected with a steam inlet pipe of the small steam turbine through a middle steam extraction pipeline. The utility model discloses can guarantee that little steam turbine admission governing valve keeps full open operation in order to reduce the throttle loss, can improve the design efficiency 4-5% of little steam turbine. In addition, as the hydraulic speed regulation device adopts the internal structures of the hydraulic coupler, the hydraulic torque converter and the planetary gear, compared with the traditional pure hydraulic coupler for transmission speed regulation, the efficiency of the speed regulation device can be greatly improved by 4 percent, the speed regulation range can reach 10 to 100 percent, and meanwhile, the reliability of the whole transmission speed regulation is higher.
Description
Technical Field
The utility model belongs to the technical field of thermal power, especially, relate to a take high-efficient hydraulic speed adjusting device's little steam turbine system of steam extraction back pressure type feed pump.
Background
The ultra-supercritical coal-fired generator set has been developed for more than ten years in China, and currently enters a secondary reheating ultra-supercritical stage, because one more reheating cycle is adopted, the heat efficiency of the generator set is improved, and energy conservation and emission reduction are promoted.
In a double reheating million unit system, in order to improve the cycle heat efficiency and the power supply efficiency of the whole unit, the power consumption of a feed pump is relatively large, and the efficiency of a high-power feed pump driving system is one of the keys influencing the overall efficiency.
Among high-parameter twice-reheating million units, a small steam turbine of a water supply pump is applied to an extraction back pressure unit. However, how to improve the efficiency of this type of thermodynamic system needs to develop a speed regulation device for a pump turbine with high efficiency.
The traditional speed regulation device such as a hydraulic coupler system is widely used, but has the disadvantages of low overall speed regulation and regulation efficiency and rapid efficiency degradation along with load change, thereby limiting the application of the traditional speed regulation device in the speed regulation of a high-power feed water pump under the condition of a high-parameter ultra-supercritical unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take high-efficient hydraulic speed adjusting device's little steam turbine system of steam extraction back pressure type feed pump can realize that little steam turbine does not have the high-efficient speed governing of wide range of admission throttle regulation and feed pump.
The utility model provides a small steam turbine system of a steam extraction back pressure type water feeding pump with a high-efficiency hydraulic speed regulating device, which comprises a small steam turbine of the steam extraction back pressure type water feeding pump, a high-efficiency hydraulic speed regulating device, a water feeding pump, a small power balance generator and a main steam turbine;
an output shaft at one end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with the high-efficiency hydraulic speed regulating device, and an output shaft at the other end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with an input shaft of the small power balance generator;
the high-efficiency hydraulic speed regulating device is connected with the water feeding pump, and the main turbine is connected with a steam inlet pipe of a small turbine of the steam extraction back pressure type water feeding pump through a middle steam extraction pipeline;
the small steam turbine of the steam extraction back pressure type water feeding pump is provided with a driving steam source and driving power by the main steam turbine; the main power of the small turbine of the steam extraction back pressure type water feeding pump is transmitted to the water feeding pump through the high-efficiency hydraulic speed regulating device; the rotating speed and the flow of the water feeding pump are adjusted through the high-efficiency hydraulic speed adjusting device; and the residual shafting power of the small turbine of the steam extraction back pressure type water feeding pump is used for driving the small power balance generator to generate electricity externally.
Furthermore, the high-efficiency hydraulic speed regulation device comprises a hydraulic coupler, a hydraulic torque converter and a planetary gear, wherein the hydraulic torque converter is connected with the hydraulic coupler and the planetary gear; an output shaft at one end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with an input shaft of the hydraulic coupler; and the output shaft of the planetary gear is connected with the input shaft of the feed pump.
By means of the scheme, the small steam turbine system of the steam extraction back pressure type water feeding pump with the high-efficiency hydraulic speed regulating device can ensure that the steam inlet regulating valve of the small steam turbine keeps full-open operation to reduce throttling loss, and the design efficiency of the small steam turbine can be improved by 4-5%. In addition, as the hydraulic speed regulation device adopts the internal structures of the hydraulic coupler, the hydraulic torque converter and the planetary gear, compared with the traditional pure hydraulic coupler for transmission speed regulation, the efficiency of the speed regulation device can be greatly improved by 4 percent, the speed regulation range can reach 10 to 100 percent, and meanwhile, the reliability of the whole transmission speed regulation is higher.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a small steam turbine system of a steam extraction back-pressure water-feeding pump with a high-efficiency hydraulic speed regulation device.
Reference numbers in the figures:
1-extracting steam back pressure type water supply pump small steam turbine; 2-high-efficiency hydraulic speed regulation device; 3-a water supply pump; 4-power balance small generator; 5-a fluid coupling; 6-a hydraulic torque converter; 7-a planetary gear; 8-main turbine.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, the embodiment provides a steam extraction back pressure type water feeding pump small turbine system with a high-efficiency hydraulic speed regulating device, which includes a steam extraction back pressure type water feeding pump small turbine 1, a high-efficiency hydraulic speed regulating device 2, a water feeding pump 3, a small power balance generator 4 and a main turbine 8; an output shaft at one end of a small steam turbine 1 of the steam extraction back pressure type water feeding pump is connected with a high-efficiency hydraulic speed regulating device 2, and an output shaft at the other end of the small steam turbine is connected with an input shaft of a small power balance generator 4; the high-efficiency hydraulic speed regulation device 2 is connected with the water feeding pump 3, and the main steam turbine 8 is connected with a steam inlet pipe of the small steam turbine 1 of the steam extraction back pressure type water feeding pump through a middle steam extraction pipeline;
the small steam turbine 1 of the steam extraction back pressure type water feeding pump is provided with a driving steam source and driving power by a main steam turbine 8; the main power of a small turbine 1 of the steam extraction back pressure type water feeding pump is transmitted to a water feeding pump 3 through a high-efficiency hydraulic speed regulating device 2; the rotating speed and the flow of the water feeding pump 3 are adjusted by the high-efficiency hydraulic speed adjusting device 2; and the residual shafting power of the small steam turbine 1 of the steam extraction back pressure type water feeding pump is used for driving the small power balance generator 4 to generate power externally.
In the embodiment, the high-efficiency hydraulic speed regulation device 2 comprises a hydraulic coupler 5, a hydraulic torque converter 6 and a planetary gear 7, wherein the hydraulic torque converter 6 is connected with the hydraulic coupler 5 and the planetary gear 7; an output shaft at one end of a small turbine 1 of the steam extraction back pressure type water feeding pump is connected with an input shaft of a hydraulic coupler 5; the output shaft of the planetary gear 7 is connected with the input shaft of the feed pump 3.
The small turbine 1 of the steam extraction back pressure type water feeding pump is provided with a driving steam source and driving power by the main turbine 8 through a connecting pipeline. The main power of the small turbine 1 of the steam extraction back pressure type water feeding pump is transmitted to the water feeding pump 3 through the high-efficiency hydraulic speed regulating device 2, and the residual power of the shafting is used for driving the small power balance generator 4.
When the system operates normally, the steam inlet regulating valve of the small steam turbine 1 of the steam extraction back pressure type water feeding pump is kept fully opened, so that the steam inlet throttling loss is reduced, and the system operation efficiency is improved. The rotation speed and flow regulation of the water feeding pump 3 is completed through the high-efficiency hydraulic speed regulation device 2, and the residual power of the shafting can be balanced by the small power balance generator 4 for external power generation. At this time, the high-efficiency hydraulic governor 2 is speed-changed by the torque converter 6 and the planetary gear 7, and the fluid coupling 5 is in a non-speed-regulation synchronous follow-up state.
Under the starting and stopping conditions, the steam inlet regulating valve of the small steam turbine 1 of the steam extraction back pressure type water feeding pump can participate in throttling regulation, at the moment, the hydraulic coupler 5 is in a speed regulation state, the hydraulic torque converter 6 is in a non-speed regulation state, and power is transmitted by the hydraulic coupler 5 and the planetary gear 7 and is output to the water feeding pump 3. Similarly, the unbalanced power of the whole shafting can be digested by the small power balance generator 4 to generate electricity externally.
Because the small power balance generator 4 is connected with the power grid, in the starting stage, the small power balance generator 4 can enter a motor mode to coaxially drive the water feeding pump 3 under the condition that the small steam turbine 1 of the steam extraction back pressure type water feeding pump does not enter steam. And the high-efficiency speed regulating device 2 still outputs power and regulates speed by combining the hydraulic coupler 5 and the planetary gear 7. At this time, the small turbine 1 of the steam extraction back pressure water feeding pump needs to be fed with a certain small flow of cooling steam in order to prevent blowing.
The high-efficiency speed regulating system can ensure that the steam inlet regulating valve of the small steam turbine 1 of the steam extraction back-pressure water supply pump keeps full-open operation so as to reduce throttling loss, and can improve the design efficiency of the small steam turbine 1 of the steam extraction back-pressure water supply pump by 4-5%. In addition, because the high-efficiency hydraulic speed regulation device 2 adopts the internal structures of the hydraulic coupler 5, the hydraulic torque converter 6 and the planetary gear 7, compared with the traditional pure hydraulic coupler for transmission speed regulation, the efficiency of the speed regulation device can be greatly improved by 4 percent, the speed regulation range can reach 10 to 100 percent, and meanwhile, the reliability of the whole transmission speed regulation is higher.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A steam extraction back pressure type water feeding pump small turbine system with a high-efficiency hydraulic speed regulating device is characterized by comprising a steam extraction back pressure type water feeding pump small turbine, a high-efficiency hydraulic speed regulating device, a water feeding pump, a small power balance generator and a main turbine;
an output shaft at one end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with the high-efficiency hydraulic speed regulating device, and an output shaft at the other end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with an input shaft of the small power balance generator;
the high-efficiency hydraulic speed regulating device is connected with the water feeding pump, and the main turbine is connected with a steam inlet pipe of a small turbine of the steam extraction back pressure type water feeding pump through a middle steam extraction pipeline;
the small steam turbine of the steam extraction back pressure type water feeding pump is provided with a driving steam source and driving power by the main steam turbine; the main power of the small turbine of the steam extraction back pressure type water feeding pump is transmitted to the water feeding pump through the high-efficiency hydraulic speed regulating device; the rotating speed and the flow of the water feeding pump are adjusted through the high-efficiency hydraulic speed adjusting device; and the residual shafting power of the small turbine of the steam extraction back pressure type water feeding pump is used for driving the small power balance generator to generate electricity externally.
2. The small steam turbine system of the steam extraction back pressure type water feeding pump with the high-efficiency hydraulic speed regulating device as claimed in claim 1, wherein the high-efficiency hydraulic speed regulating device comprises a hydraulic coupler, a hydraulic torque converter and a planetary gear, and the hydraulic torque converter is connected with the hydraulic coupler and the planetary gear; an output shaft at one end of the small steam turbine of the steam extraction back pressure type water feeding pump is connected with an input shaft of the hydraulic coupler; and the output shaft of the planetary gear is connected with the input shaft of the feed pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921296605.4U CN210889042U8 (en) | 2019-08-08 | 2019-08-08 | Steam extraction back pressure type water feeding pump small steam turbine system with high-efficiency hydraulic speed regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921296605.4U CN210889042U8 (en) | 2019-08-08 | 2019-08-08 | Steam extraction back pressure type water feeding pump small steam turbine system with high-efficiency hydraulic speed regulating device |
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| Publication Number | Publication Date |
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| CN210889042U true CN210889042U (en) | 2020-06-30 |
| CN210889042U8 CN210889042U8 (en) | 2020-08-07 |
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| CN201921296605.4U Expired - Fee Related CN210889042U8 (en) | 2019-08-08 | 2019-08-08 | Steam extraction back pressure type water feeding pump small steam turbine system with high-efficiency hydraulic speed regulating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486094A (en) * | 2019-08-08 | 2019-11-22 | 大唐郓城发电有限公司 | A kind of back pressure extraction feed pump small turbine system with high-efficiency hydraulic speed regulation device |
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2019
- 2019-08-08 CN CN201921296605.4U patent/CN210889042U8/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486094A (en) * | 2019-08-08 | 2019-11-22 | 大唐郓城发电有限公司 | A kind of back pressure extraction feed pump small turbine system with high-efficiency hydraulic speed regulation device |
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| CN210889042U8 (en) | 2020-08-07 |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Patentee|Address|Patentee Correct: DATANG YUNCHENG POWER GENERATION Co.,Ltd.|274799, 14th Floor, Xinghe International Office Building, Dongxi Road, Yuncheng County, Heze City, Shandong Province|Thermal Power Technology Research Institute of China Datang Group Science and Technology Research Institute Co., Ltd. False: DATANG YUNCHENG POWER GENERATION Co.,Ltd.|274799, 14th Floor, Xinghe International Office Building, Dongxi Road, Yuncheng County, Heze City, Shandong Province|Thermal Power Technology Research Institute of China Datang Group Science and Technology Research Institute Co., Ltd. Number: 27-01 Volume: 36 Correction item: Patentee|Address|Patentee Correct: DATANG YUNCHENG POWER GENERATION Co.,Ltd.|274799, 14th Floor, Xinghe International Office Building, Dongxi Road, Yuncheng County, Heze City, Shandong Province|Thermal Power Technology Research Institute of China Datang Group Science and Technology Research Institute Co., Ltd. False: DATANG YUNCHENG POWER GENERATION Co.,Ltd.|274799, 14th Floor, Xinghe International Office Building, Dongxi Road, Yuncheng County, Heze City, Shandong Province|Thermal Power Technology Research Institute of China Datang Group Science and Technology Research Institute Co., Ltd. Number: 27-01 Page: The title page Volume: 36 |
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| CU01 | Correction of utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200630 Termination date: 20210808 |
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| CF01 | Termination of patent right due to non-payment of annual fee |