CN109209525B - High back pressure steam turbine set - Google Patents
High back pressure steam turbine set Download PDFInfo
- Publication number
- CN109209525B CN109209525B CN201811409152.1A CN201811409152A CN109209525B CN 109209525 B CN109209525 B CN 109209525B CN 201811409152 A CN201811409152 A CN 201811409152A CN 109209525 B CN109209525 B CN 109209525B
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- side wall
- nozzle
- fixed
- impeller
- inlet pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The invention discloses a high-back-pressure steam turbine set, which comprises a set body, wherein the set body comprises a steam inlet pipeline and an impulse mechanism, a heat preservation mechanism is arranged on the outer side of the steam inlet pipeline, the heat preservation mechanism comprises a heat preservation sleeve which is attached to the outer side wall of the steam inlet pipeline, an annular plate is fixed on the inner side wall of the steam inlet pipeline, a cavity is formed in the annular plate, a heating wire is connected in the cavity, an exhaust port is formed in the inner side wall of the annular plate along the axial array direction of the annular plate, the exhaust port is communicated with the cavity, the impulse mechanism comprises a rotating shaft, an impeller, moving blades and a nozzle, the impeller is fixed on the outer side wall of the rotating shaft, and a plurality of moving blades which are symmetrically arranged are fixed on the outer side wall of the impeller along the axial array direction of the impeller. The invention can adjust the spraying caliber of the nozzle, thereby adjusting the speed of the steam flow sprayed from the nozzle, further adjusting the rotating speed of the impeller, improving the conversion efficiency, and carrying out heat preservation and heating on the steam inlet pipeline to reduce the heat dissipation of the hot steam.
Description
Technical Field
The invention relates to the technical field of backpressure units, in particular to a high-backpressure steam turbine unit.
Background
The back pressure unit is a generator set which adjusts the power generation load by the heat load, namely, the power generation amount is changed along with the amount of the external supplied steam, and the steam turbine enters the steam turbine and discharges the steam. Therefore, the back pressure turbine has good economy, the steam extraction turbine can generate electricity and supply heat to the outside through air extraction, the electric heating mutual adjustment performance is good, two turbines are arranged in a common thermoelectric unit, and the unit can make corresponding adjustment according to the change of the outside load, so that the economic operation of the unit is ensured.
When the existing back pressure steam turbine set is used, hot steam is introduced into a steam inlet pipeline, the heat loss of the hot steam is easily caused due to the fact that the temperature near the steam inlet pipeline is low, the existing impulse mechanism generally expands in a nozzle through the steam, the pressure is reduced, the speed is increased, the heat energy is converted into kinetic energy, when high-speed airflow flows through moving blades, impulse force to the moving blades is generated due to the change of the airflow direction, an impeller is pushed to rotate to do work, the southeast of the steam is converted into mechanical energy of shaft rotation, however, the size of an outlet of the nozzle cannot be adjusted according to requirements through the nozzle of the existing high back pressure steam turbine set, and therefore the impulse force of the airflow to the moving blades cannot be adjusted.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-back-pressure steam turbine set.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-back-pressure steam turbine set comprises a set body, wherein the set body comprises a steam inlet pipeline and an impulse mechanism, a heat preservation mechanism is arranged on the outer side of the steam inlet pipeline, the heat preservation mechanism comprises a heat preservation sleeve which is attached to the outer side wall of the steam inlet pipeline, an annular plate is fixed on the inner side wall of the steam inlet pipeline, a cavity is formed in the annular plate, a heating wire is connected in the cavity, an exhaust port is formed in the inner side wall of the annular plate along the axial array direction of the annular plate and communicated with the cavity, the impulse mechanism comprises a rotating shaft, an impeller, moving blades and a nozzle, the impeller is fixed on the outer side wall of the rotating shaft, a plurality of moving blades which are symmetrically arranged are fixed on the outer side wall of the impeller along the axial array direction of the impeller, the nozzle is arranged above the moving blades, an adjusting mechanism is arranged in the nozzle, and comprises symmetrically arranged fixed blocks which are fixed on the side wall at the bottom end of the nozzle, and the fixed blocks and the nozzles are vertically arranged, the side wall of one side of one fixed block is connected with a protection box, and the inside of the protection box is connected with a driving motor through bolts.
Preferably, the output shaft of the driving motor is connected with a transmission shaft through a coupler, one end, far away from the driving motor, of the transmission shaft extends to the other end of the transmission shaft, the side wall of the fixing block is rotatably connected, and the transmission shaft and the fixing block are vertically arranged.
Preferably, the first recess that the symmetry set up is seted up to the both sides inner wall of nozzle, and sliding connection has the slider between the both sides lateral wall of first recess, and one side lateral wall top of slider is fixed with the connecting plate of perpendicular setting, the one end that the slider was kept away from to the connecting plate is fixed with the regulating plate that the slope set up.
Preferably, the lateral walls of the two sides of the adjusting plate are in contact with the lateral walls of the two sides of the nozzle, and the contact position of the adjusting plate and the nozzle is connected with a sealing gasket.
Preferably, a through hole is formed in the side wall of one side of the adjusting plate, one end of the transmission shaft penetrates through the through hole, reverse threads are formed in the outer side wall of the transmission shaft, and the transmission shaft and the adjusting plate are arranged in a thread matching mode.
Preferably, the second recess that the symmetry set up is seted up to the both sides lateral wall of nozzle, and the inside sliding connection of second recess has the guide bar, and the other end of guide bar extends to the second recess outside and is connected with the regulating plate lateral wall.
Preferably, the cross section of the moving blade is arc-shaped, and the moving blade is vertically arranged with the impeller.
The invention has the beneficial effects that:
1. through the arranged impulse mechanism and the adjusting mechanism, the spraying caliber of the nozzle can be adjusted according to the heat quantity of the steam, so that the spraying speed of the steam airflow from the nozzle is adjusted, the rotating speed of the impeller is adjusted, and the conversion efficiency is improved;
2. the heat preservation mechanism can preserve heat and heat the steam inlet pipeline, reduces heat dissipation of hot steam and improves practicability;
3. the invention can adjust the spraying caliber of the nozzle, thereby adjusting the speed of the steam flow sprayed from the nozzle, further adjusting the rotating speed of the impeller, improving the conversion efficiency, and can heat-insulating and heating the steam inlet pipeline, reduce the heat dissipation of the hot steam and improve the practicability.
Drawings
FIG. 1 is a side view of a block body structure of a high back pressure steam turbine block according to the present invention;
FIG. 2 is a side view of the steam inlet duct structure of a high back pressure steam turbine set in accordance with the present invention;
FIG. 3 is a side view of the structure of the impulse mechanism of a high back pressure steam turbine set according to the present invention;
FIG. 4 is a top view of a rotor blade structure of a high back pressure steam turbine set in accordance with the present invention;
FIG. 5 is an enlarged schematic view of part A of a high back pressure steam turbine set according to the present invention;
fig. 6 is a top view of an impeller structure of a high back pressure steam turbine set according to the present invention.
In the figure: the device comprises a unit body 1, a steam inlet pipeline 2, a heat insulation sleeve 3, an annular plate 4, a cavity 5, a heating wire 6, an exhaust port 7, a rotating shaft 8, an impeller 9, a moving blade 10, a nozzle 11, a fixed block 12, a protective box 13, a driving motor 14, a transmission shaft 15, a first groove 16, a sliding block 17, a connecting plate 18, an adjusting plate 19, a second groove 20 and a guide rod 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-6, a high back pressure steam turbine set, which comprises a set body 1, the set body 1 comprises a steam inlet pipeline 2 and an impulse mechanism, a heat preservation mechanism is arranged outside the steam inlet pipeline 2, the heat preservation mechanism comprises a heat preservation sleeve 3 attached to the outer side wall of the steam inlet pipeline 2, an annular plate 4 is fixed on the inner side wall of the steam inlet pipeline 2, a cavity 5 is arranged inside the annular plate 4, a heating wire 6 is connected inside the cavity 5, an exhaust port 7 is arranged on the inner side wall of the annular plate 4 along the axial array direction, the exhaust port 7 is communicated with the inside of the cavity 5, the impulse mechanism comprises a rotating shaft 8, an impeller 9, a moving blade 10 and a nozzle 11, the outer side wall of the rotating shaft 8 is fixed with the impeller 9, the outer side wall of the impeller 9 is fixed with a plurality of moving blades 10 which are symmetrically arranged along the axial array direction, the nozzle 11 is arranged above the moving blade 10, and an adjusting mechanism is arranged inside the nozzle 11, the adjusting mechanism comprises fixing blocks 12 which are fixed on the side wall of the bottom end of the nozzle 11 and are symmetrically arranged, the fixing blocks 12 and the nozzle 11 are vertically arranged, one side wall of one fixing block 12 is connected with a protection box 13, and the inside of the protection box 13 is connected with a driving motor 14 through bolts.
An output shaft of a driving motor 14 is connected with a transmission shaft 15 through a coupler, one end of the transmission shaft 15, far away from the driving motor 14, extends to the side wall of another fixed block 12 to be rotatably connected, the transmission shaft 15 and the fixed block 12 are vertically arranged, the inner walls of two sides of a nozzle 11 are provided with first grooves 16 which are symmetrically arranged, a sliding block 17 is slidably connected between the side walls of two sides of the first groove 16, the top end of one side wall of the sliding block 17 is fixedly provided with a connecting plate 18 which is vertically arranged, one end of the connecting plate 18, far away from the sliding block 17, is fixedly provided with an adjusting plate 19 which is obliquely arranged, the side walls of two sides of the adjusting plate 19 are both contacted with the side walls of the nozzle 11, a sealing gasket is connected at the contact part of the adjusting plate 19 and the nozzle 11, one side wall of one side of the adjusting plate 19 is provided with a through hole, one end of the transmission shaft 15 passes through the through hole, the outer side wall of the transmission shaft 15 is provided with reverse threads, and the adjusting plate 19 are arranged in a matched manner, the two side walls of the nozzle 11 are provided with second grooves 20 which are symmetrically arranged, the inside of the second groove 20 is connected with a guide rod 21 in a sliding mode, the other end of the guide rod 21 extends to the outside of the second groove 20 to be connected with the side wall of an adjusting plate 19, the cross section of the moving blade 10 is arc-shaped, the moving blade 10 and the impeller 9 are vertically arranged, and the model of the unit body 1 is STT 624.
Example (b): when the spraying aperture of the nozzle 11 is adjusted, the driving motor 14 is started, the driving motor 14 drives the transmission shaft 15 to rotate, the transmission shaft 15 drives the adjusting plate 19 to approach or separate from each other through thread transmission, the adjusting plate 19 performs a guiding function through the connecting plate 18 and the guide rod 21 in the moving process, meanwhile, the sealing performance between the adjusting plate 19 and the inner wall of the nozzle 11 is improved through the arranged sealing gasket, the air flow sprayed out of the nozzle 11 blows the moving blade 10 to rotate the impeller 9, meanwhile, the heating wire 6 is started, the heat generated by the heating wire 6 enters the steam inlet pipeline 2 from the exhaust port 7 to preheat and insulate the steam inlet pipeline 2, further, the heat emission of the steam inlet pipeline 2 can be reduced through the arranged insulation sleeve 3, the design is simple and fast, the spraying aperture of the nozzle can be adjusted, and the spraying speed of the steam flow from the nozzle can be adjusted, and then adjust the slew velocity of impeller, improved conversion efficiency, can keep warm the heating to admission line department moreover, reduce the heat of hot steam and distribute, improved the practicality.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The high-backpressure steam turbine set comprises a set body (1) and is characterized in that the set body (1) comprises a steam inlet pipeline (2) and an impulse mechanism, a heat preservation mechanism is arranged on the outer side of the steam inlet pipeline (2) and comprises a heat preservation sleeve (3) which is attached to the outer side wall of the steam inlet pipeline (2), an annular plate (4) is fixed on the inner side wall of the steam inlet pipeline (2), a cavity (5) is formed in the annular plate (4), a heating wire (6) is connected to the inside of the cavity (5), an exhaust port (7) is formed in the inner side wall of the annular plate (4) along the axial array direction of the annular plate, the exhaust port (7) is communicated with the inside of the cavity (5), the impulse mechanism comprises a rotating shaft (8), an impeller (9), a moving blade (10) and a nozzle (11), the impeller (9) is fixed on the outer side wall of the rotating shaft (8), a plurality of moving blades (10) which are symmetrically arranged are fixed on the outer side wall of the impeller (9) along the axial array direction of the moving blades, nozzles (11) are arranged above the moving blades (10), an adjusting mechanism is arranged in the nozzles (11), the adjusting mechanism comprises symmetrically arranged fixed blocks (12) which are fixed on the side wall of the bottom end of each nozzle (11), the fixed blocks (12) and the nozzles (11) are vertically arranged, one side wall of one fixed block (12) is connected with a protection box (13), and the protection box (13) is internally connected with a driving motor (14) through bolts;
an output shaft of the driving motor (14) is connected with a transmission shaft (15) through a coupler, one end, far away from the driving motor (14), of the transmission shaft (15) extends to the side wall of the other fixing block (12) to be connected in a rotating mode, and the transmission shaft (15) and the fixing block (12) are vertically arranged;
first grooves (16) which are symmetrically arranged are formed in the inner walls of the two sides of the nozzle (11), a sliding block (17) is connected between the side walls of the two sides of the first groove (16) in a sliding mode, a connecting plate (18) which is vertically arranged is fixed at the top end of the side wall of one side of the sliding block (17), and an adjusting plate (19) which is obliquely arranged is fixed at one end, away from the sliding block (17), of the connecting plate (18);
the both sides lateral wall of regulating plate (19) all contacts with nozzle (11) both sides lateral wall, and regulating plate (19) and nozzle (11) contact department is connected with sealed the pad.
2. The high back pressure steam turbine set according to claim 1, wherein a through hole is formed in a side wall of the adjusting plate (19), one end of the transmission shaft (15) passes through the through hole, a reverse thread is formed in an outer side wall of the transmission shaft (15), and the transmission shaft (15) and the adjusting plate (19) are in thread fit arrangement.
3. The high back pressure steam turbine unit as claimed in claim 1, wherein the two side walls of the nozzle (11) are provided with symmetrically arranged second grooves (20), the inside of the second groove (20) is slidably connected with a guide rod (21), and the other end of the guide rod (21) extends to the outside of the second groove (20) and is connected with the side wall of the adjusting plate (19).
4. A high back pressure steam turbine plant according to claim 1, characterized in that the moving blades (10) are arcuate in cross section and that the moving blades (10) are arranged perpendicularly to the impeller (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409152.1A CN109209525B (en) | 2018-11-23 | 2018-11-23 | High back pressure steam turbine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409152.1A CN109209525B (en) | 2018-11-23 | 2018-11-23 | High back pressure steam turbine set |
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| Publication Number | Publication Date |
|---|---|
| CN109209525A CN109209525A (en) | 2019-01-15 |
| CN109209525B true CN109209525B (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811409152.1A Active CN109209525B (en) | 2018-11-23 | 2018-11-23 | High back pressure steam turbine set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110332014A (en) * | 2019-07-26 | 2019-10-15 | 天津商业大学 | A kind of runner of regulating gas flow direction |
| CN113279826B (en) * | 2021-06-22 | 2022-03-25 | 中国核动力研究设计院 | Guiding and supporting device suitable for foreign matter operation tool in steam turbine pipeline |
| CN113352413B (en) * | 2021-07-05 | 2022-05-17 | 佛山市立耀新材料有限公司 | Automatic bamboo softening and decomposing equipment and rapid softening and decomposing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US2648195A (en) * | 1945-12-28 | 1953-08-11 | Rolls Royce | Centrifugal compressor for supercharging internal-combustion engines |
| EP1191192A1 (en) * | 2000-09-26 | 2002-03-27 | Siemens Aktiengesellschaft | Method and apparatus for preheating and dewatering of turbine stage steam conduits |
| US6419464B1 (en) * | 2001-01-16 | 2002-07-16 | Honeywell International Inc. | Vane for variable nozzle turbocharger |
| KR101070903B1 (en) * | 2004-08-19 | 2011-10-06 | 삼성테크윈 주식회사 | Turbine having variable vane |
| CN100523439C (en) * | 2007-08-02 | 2009-08-05 | 寿光市康跃增压器有限公司 | Composite spray of variable cross-section turbosupercharger |
| IN2012DN02819A (en) * | 2009-10-06 | 2015-07-24 | Cummins Ltd | |
| CN203867638U (en) * | 2014-03-10 | 2014-10-08 | 北京全四维动力科技有限公司 | Auxiliary steam heating system of turbine valve |
| DE102014214915B3 (en) * | 2014-07-30 | 2015-12-10 | MTU Aero Engines AG | Housing for a gas turbine, aircraft engine and a method for operating a gas turbine |
| CN204610293U (en) * | 2015-05-08 | 2015-09-02 | 江苏海事职业技术学院 | A kind of turbo machine |
| CN207161145U (en) * | 2017-09-05 | 2018-03-30 | 恒盛能源股份有限公司 | A kind of ventilation protection device of high-efficiency steam pipeline |
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Effective date of registration: 20211105 Address after: 719400 Huangfuchuan Industrial Park, Huangfu Town, Fugu County, Yulin City, Shaanxi Province Applicant after: Fugu kechuangyuan Energy Technology Co.,Ltd. Address before: 341000 Room 501, unit 1, building 10, Tianji Huating, No. 2, Changzheng Avenue, Zhanggong District, Ganzhou City, Jiangxi Province Applicant before: Chen Jiying |
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