CN113153457A - Static testing system and method for stationary blade heating and dehumidifying - Google Patents
Static testing system and method for stationary blade heating and dehumidifying Download PDFInfo
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- CN113153457A CN113153457A CN202110409488.3A CN202110409488A CN113153457A CN 113153457 A CN113153457 A CN 113153457A CN 202110409488 A CN202110409488 A CN 202110409488A CN 113153457 A CN113153457 A CN 113153457A
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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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
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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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
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- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a static test system and a static test method for heating and dehumidifying of a stationary blade, which are used for researching the influence of the flow of heating steam in an internal channel of the stationary blade on the evaporation of an external water film. According to the testing method provided by the invention, a high-speed camera and a thermal infrared imager are used for researching the evaporation process of the surface of the stationary blade, the steam pressure and the flow of the heating channel in the stationary blade, the stationary blade inclination angle and the influence rule of the internal channel structure on the water film evaporation speed and the water film evaporation process of the surface of the stationary blade can be obtained, basic data are provided for the optimization of the internal heating channel structure and the operation parameters of the blade, and the reliability of the numerical simulation result is tested.
Description
Technical Field
The invention belongs to the technical field of turbine blade dehumidification, and particularly relates to a static blade heating dehumidification testing system and method.
Background
The water film is formed by gathering primary water drops formed by condensation of steam in the wet steam stage of the steam turbine on the surface of the stationary blade, and the water film is torn by high-speed steam flow to form secondary water drops to continuously impact the movable blade, so that the water erosion of the blade can be caused, the service life of the blade is shortened, and even the blade is broken, and the normal operation of the steam turbine is seriously threatened.
The turbine stator blade dehumidification technology adopts a hollow stator blade, and removes a liquid film attached to the surface of the stator blade or large liquid drops at the tail edge by a suction, blowing or heating method so as to reduce the water erosion of the blade. The suction and blowing methods need to form slots on the surfaces of the static blades, and on one hand, the two methods destroy the surface structures of the static blades and weaken the strength of the blades; on the other hand, the pneumatic efficiency is reduced because the suction and purging of the steam interfere with the main flow. Compared with the prior art, when the heating method is adopted, the heating steam only flows in the hollow stationary blade, water drops or water films are evaporated by heating the outer surface of the stationary blade, the influence on the strength of the blade and the pneumatic performance of a main flow is small, in addition, the heating steam can adopt steam seal steam discharge of a steam turbine or some steam leakage in a thermodynamic system, external energy is not introduced, the integral energy utilization rate of the steam turbine can be improved, and the energy-saving effect is good.
The method for heating and dehumidifying the stationary blade is an efficient turbine stationary blade dehumidifying technology and has a wide application prospect, but the method relates to a complex phase change heat exchange process, and comprises a plurality of complex problems of heating channel design, heating steam parameter selection and the like. Therefore, the key problems involved in the heating and dehumidifying of the turbine stator blade are researched, the heating and dehumidifying test is developed to obtain basic research data, and an efficient heating and dehumidifying technology based on the real application environment of the turbine stator blade is developed, so that the method is vital to reducing the water erosion of the blade and further ensuring the safe operation of a unit.
Disclosure of Invention
The invention aims to provide a static testing system and a static testing method for heating and dehumidifying of a stationary blade, which are used for researching the saturated steam pressure, the flow velocity (flow) and the blade inclination of a heating channel in the stationary blade and the influence rule of a channel structure on the evaporation velocity of a water film on the surface of the stationary blade and the evaporation process of the water film, and providing basic data for optimizing the blade heating channel structure and the operation parameters.
In order to achieve the purpose, the invention adopts the technical scheme that:
a static testing system for heating and dehumidifying of a stationary blade comprises a heating steam passage, a saturated water passage and a data acquisition circuit;
the heating steam passage comprises a steam inlet regulating valve, a volume flow meter and a water tank which are sequentially connected, and the test piece is used for being connected between the volume flow meter and the water tank and arranged on the coordinate frame;
the saturated water passage is arranged above the test piece and comprises a water inlet regulating valve and an atomizing nozzle which are connected in sequence;
the data acquisition circuit comprises a high-speed camera, a thermal infrared imager and a computer, wherein the high-speed camera is used for continuously shooting images of a water film evaporation process on the surface of the stationary blade, the thermal infrared imager is used for measuring the temperature distribution on the surface of the stationary blade, and the computer stores data of the high-speed camera and the thermal infrared imager.
The invention is further improved in that the steam inlet regulating valve is used for controlling the on-off of the heating steam and regulating the flow of the heating steam, the volume flow meter is used for measuring the flow of the heating steam, and the volume flow meter has the characteristic of high temperature resistance due to higher steam temperature.
The invention is further improved in that the test piece is a stationary blade having an internal heating channel, and a heating steam inlet and a heating steam outlet are present on the upper surface of the stationary blade.
The invention is further improved in that the heating steam is condensed into water in the water tank after flowing out of the steam outlet of the test piece, and in order to ensure the rotation of the test piece, a pipeline connected with the steam inlet and the steam outlet adopts a metal hose.
The coordinate frame is further improved in that the coordinate frame comprises a base, a dial and a test piece clamping arm, the clamping arm is divided into an upper short arm and a lower long arm, one end of the lower long arm is vertically fixed with the base, the other end of the lower long arm is connected with the upper short arm through a bolt, the included angle between the short arm and the long arm is adjustable, the dial is arranged at the connection position to measure the included angle between the long arm and the short arm, and the other end of the short arm is vertically and fixedly connected with the test piece.
The invention is further improved in that the water inlet regulating valve is used for controlling the on-off of the saturated water, and the atomizing nozzle is used for spraying the saturated water on the surface of the stationary blade to form a water film.
A static testing method for stator blade heating and dehumidifying is based on the static testing system for stator blade heating and dehumidifying, and comprises the following steps:
1) designing and selecting an internal heating channel of the stationary blade by using a numerical simulation method, increasing rib column turbulent flow structures and adjusting turbulent flow structure parameters when the internal channel of the blade adopts a U-shaped turning serpentine channel, primarily calculating and comparing the performances of different channels by using the numerical simulation method, and selecting a design scheme with the best performance according to a numerical calculation result to process to obtain a test piece required by testing;
2) multi-parameter test testing of test pieces on a test system
3) And analyzing the measurement results of the high-speed camera and the thermal infrared imager, optimizing the internal heating channel structure of the blade by combining numerical simulation, and repeating the test to obtain the saturated steam pressure, the flow, the blade inclination angle and the influence rule of the channel structure on the water film evaporation speed and the water film evaporation process on the surface of the stationary blade.
The invention has the further improvement that the step 2) specifically comprises the following steps:
(a) checking whether each component of the test system can normally run or not, and debugging the test and measurement system to reach the condition of normal test measurement; installing a test piece on a coordinate frame of a blade static heating and dehumidifying test system, horizontally placing the test piece at the moment, enabling the pressure surface to face upwards, starting a high-speed camera and a thermal infrared imager, and adjusting the placing angle and the placing distance to ensure that the high-speed camera and the thermal infrared imager can completely shoot the surface of the test piece;
(b) generating heating steam with set pressure by using a steam boiler, adjusting the opening of a steam inlet adjusting valve, opening the water inlet adjusting valve after the flow reading shown by a volume flowmeter is stabilized at the set parameter of the test, enabling saturated water to form a water film on the surface of the blade in the form of water mist or water drops through an atomizing nozzle, and setting the shooting frame rate and the resolution of a high-speed camera; starting a high-speed camera and a thermal infrared imager while closing the water inlet adjusting valve, and continuously shooting a water film evaporation process image on the surface of the stationary blade and a temperature distribution image on the surface of the stationary blade until water drops attached to the surface of the stationary blade disappear; closing the steam inlet regulating valve and storing the test data on the computer;
(c) adjusting the opening of the steam inlet adjusting valve to change the steam flow, and completing test measurement under different saturated steam pressures and different flows according to the method in the step (b);
(d) adjusting the included angle between the upper short arm and the lower long arm of the coordinate frame clamping arm to change the inclination angle of the test piece, adjusting the position of the atomizing nozzle to ensure that a water film can be sprayed on the surface of the stationary blade, adjusting the positions of the high-speed camera and the thermal infrared imager to ensure that the surface of the stationary blade can be completely shot; and (c) completing test measurement under different typical inclination angles according to the methods of the steps (b) and (c), and analyzing the influence of the heating steam pressure, the flow and the inclination angle of the blade surface on the water film evaporation speed.
The invention has at least the following beneficial technical effects:
1. in the stationary blade heating and dehumidifying test system, heating steam is generated by a steam boiler, the pressure parameter of the heating steam is adjustable, the steam flow is controlled by the steam inlet adjusting valve, stationary blades of different internal heating channels can be designed for testing, and the stationary blades are arranged on the coordinate frame with the adjustable angle.
2. And spraying water on the surfaces of the static blades by using the atomizing nozzles to form water films so as to simulate the water films formed by deposition of main steam on the surfaces of the static blades.
3. And observing the evaporation (dehumidification) process and the evaporation (dehumidification) speed of water films in different areas on the surface of the stationary blade by using a high-speed camera, and measuring the temperature distribution of the surface of the stationary blade by using a thermal infrared imager to provide data for the optimization of the heating channel structure in the blade.
In conclusion, the invention adopts a numerical calculation method to carry out design analysis on the heating channel inside the static blade, and screens a typical structure to obtain a test piece for testing. And placing the test piece in a test system to carry out multi-parameter tests, and recording test data results. And analyzing the test data by combining the numerical calculation result, optimizing the parameters of the internal channel of the blade, repeatedly performing the test, finally obtaining the influence rule of different parameters on the water film evaporation speed and the water film evaporation process on the surface of the stationary blade, and providing basic data for the optimization of the blade heating channel structure and the operation parameters.
Drawings
FIG. 1 is a flow chart of a static testing method for stationary blade heating and dehumidification according to the present invention.
FIG. 2 is a schematic diagram of a static test method testing system.
FIG. 3 is a flow chart of a static test procedure for vane heating dehumidification.
Description of reference numerals:
the method comprises the following steps of 1-steam inlet adjusting valve, 2-volume flow meter, 3-test piece, 4-coordinate frame, 5-water tank, 6-water inlet adjusting valve, 7-atomizing nozzle, 8-thermal infrared imager, 9-high-speed camera, 10-computer, 11-steam inlet and 12-steam outlet.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The invention provides a static testing system and a static testing method for static blade heating and dehumidification, which are used for researching the evaporation process of heating steam inside a static blade to a water film through a heating channel to heat the surface of the static blade, wherein the water film on the surface of the blade is formed by spraying saturated water on the surface of the blade through an atomizing nozzle 7. The method can research the influence rule of steam parameters, internal heating channel structures and blade inclination angles on the stationary blade water film evaporation speed and the water film evaporation process.
Referring to fig. 1, the static testing method for stationary blade heating and dehumidification provided by the invention comprises the following steps:
1) a static test system used in the static blade heating and dehumidifying static test method is established. Referring to fig. 2, a schematic diagram of a static test method test system is shown, and the system mainly comprises a heating steam passage, a saturated water passage and a data acquisition circuit. The heating steam passage is composed of a steam inlet adjusting valve 1, a volume flow meter 2, a test piece 3, a coordinate frame 4, a water tank 5 and a connecting pipeline, wherein the steam inlet adjusting valve 1 plays a role of controlling on-off of heating steam and adjusting the flow of the heating steam, the volume flow meter 2 is used for measuring the flow of the heating steam, the volume flow meter 2 has the characteristic of high temperature resistance due to high steam temperature, the test piece 3 is a static blade with an internal heating channel, as shown in a gray square frame in figure 2, a heating steam inlet 11 and a heating steam outlet 12 are arranged on the upper surface of the static blade, the heating steam flows in a U-shaped turning serpentine mode inside the static blade, as shown by a dotted line in a square frame of the test piece 3, the test piece 3 is fixed on the coordinate frame 4, the coordinate frame 4 is composed of a base, a dial and a test piece clamping arm, the clamping arm is divided into an upper short arm and a lower long arm, one end of the lower long arm is vertically fixed with the base, the other end of the short arm is connected with the upper short arm through a bolt, so that the included angle between the short arm and the long arm is adjustable, a dial is arranged at the joint for measuring the included angle between the long arm and the short arm, the other end of the short arm is vertically and fixedly connected with the test piece, heating steam is condensed into water in the water tank 5 after flowing out of the steam outlet 12 of the test piece 3, and a metal hose is adopted for a pipeline connected with the steam inlet 11 and the steam outlet 12 so as to ensure the rotation of the test piece. The saturated water passage is arranged above the test piece 3 and consists of a water inlet adjusting valve 6, an atomizing nozzle 7 and a connecting pipeline, the water inlet adjusting valve 6 controls the on-off of the saturated water, and the atomizing nozzle 7 sprays the saturated water on the surface of the stationary blade to form a water film. The data acquisition circuit consists of a high-speed camera 8, a thermal infrared imager 9 and a computer 10, the high-speed camera 8 continuously shoots water film evaporation process images of the surface of the stationary blade, the thermal infrared imager 9 measures the temperature distribution of the surface of the stationary blade, and the computer 10 stores data of the high-speed camera 8 and the thermal infrared imager 9.
2) The method comprises the steps of designing and selecting an internal heating channel of a stationary blade by using a numerical simulation method, designing and comparing different channel performances by using a numerical simulation method in such a way that a U-shaped turning snake-shaped channel is adopted as the internal channel of the blade, a rib column turbulent flow structure is added by designing the width-to-height ratio of the channel, turbulent flow structure parameters are adjusted, and the like. And selecting a design scheme with obvious performance according to the numerical calculation result to process to obtain a test piece 3 required by the test.
3) The test piece 3 was subjected to a multi-parameter test on a test system. Referring to FIG. 3, a flow chart of vane heating dehumidification static test steps includes the steps of:
(a) and checking whether each part of the test system can normally run or not, and debugging the test and measurement system to reach the condition of normal test measurement. The test piece 3 is installed on the upper short arm of the clamping arm of the coordinate frame 4 of the blade static heating and dehumidifying test system, the upper short arm is initially parallel to the lower long arm, the test piece 3 is horizontally placed at the moment, the pressure surface faces upwards, and the surface where the black cross star is located in the figure 2 is the pressure surface of the stationary blade. And starting the high-speed camera 8 and the thermal infrared imager 9, and adjusting the placing angle and the placing distance to ensure that the high-speed camera and the thermal infrared imager can completely shoot the surfaces of the static blades.
(b) The steam boiler is used for generating heating steam with set pressure, the opening degree of the steam inlet adjusting valve 1 is adjusted, after the flow reading shown by the volume flow meter 2 is stabilized at the set parameter of the test, the water inlet adjusting valve 6 is opened, saturated water is enabled to form a water film on the surface of the blade in the form of water mist or water drops through the atomizing nozzle 7, and the shooting frame rate and the resolution of the high-speed camera 8 are set. And starting the high-speed camera 8 and the thermal infrared imager 9 while closing the water inlet adjusting valve 6, and continuously shooting a water film evaporation process image and a stationary blade surface temperature distribution image of the stationary blade surface until water drops attached to the stationary blade surface disappear. The steam inlet regulating valve 1 is closed, and the test data is stored on the computer 10.
(c) And (c) adjusting the opening of the steam inlet adjusting valve 1 to change the steam flow, and completing test measurement under different saturated steam pressures and different flows according to the method in the step (b).
(d) The included angle of the upper short arm and the lower long arm of the clamping arm of the coordinate frame 4 is adjusted to change the inclination angle of the test piece 3, the position of the atomizing nozzle 7 is adjusted, the fixed blade surface is guaranteed to be sprayed to form a water film, the positions of the high-speed camera 8 and the thermal infrared imager 9 are adjusted, and the fixed blade surface can be completely shot. And (c) completing test measurement under different typical inclination angles according to the methods (b) and (c), and analyzing the influence of the heating steam pressure, the flow and the inclination angle of the blade surface on the water film evaporation speed.
4) And analyzing the measurement results of the high-speed camera 8 and the thermal infrared imager 9, optimizing the internal heating channel structure of the blade by combining numerical simulation, repeating the test to obtain the saturated steam pressure, the flow, the blade inclination angle and the influence rule of the channel structure on the water film evaporation speed and the water film evaporation process on the surface of the stationary blade, providing basic data for optimizing the blade heating channel structure and the operation parameters, and checking the reliability of the numerical simulation result.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is set forth in the following claims.
Claims (8)
1. A static testing system for heating and dehumidifying a stationary blade is characterized by comprising a heating steam passage, a saturated water passage and a data acquisition circuit;
the heating steam passage comprises a steam inlet regulating valve (1), a volume flow meter (2) and a water tank (5) which are sequentially connected, and the test piece (3) is used for being connected between the volume flow meter (2) and the water tank (5) and arranged on the coordinate frame (4);
the saturated water passage is arranged above the test piece (3) and comprises a water inlet regulating valve (6) and an atomizing nozzle (7) which are connected in sequence;
the data acquisition circuit comprises a high-speed camera (8), a thermal infrared imager (9) and a computer (10), the high-speed camera (8) is used for continuously shooting images of a water film evaporation process on the surfaces of the stationary blades, the thermal infrared imager (9) is used for measuring temperature distribution on the surfaces of the stationary blades, and the computer (10) stores data of the high-speed camera (8) and the thermal infrared imager (9).
2. The static testing system for stationary blade heating and dehumidification as recited in claim 1, wherein the steam inlet adjusting valve (1) is used for controlling on/off of the heating steam and adjusting the flow rate of the heating steam, the volume flow meter (2) is used for measuring the flow rate of the heating steam, and the volume flow meter (2) has the characteristic of high temperature resistance due to the high temperature of the steam.
3. A stationary blade heating and dehumidifying static test system as claimed in claim 1, wherein the test piece (3) is a stationary blade having an inner heating passage, and a heating steam inlet (11) and a heating steam outlet (12) are present on an upper surface of the stationary blade.
4. A static stationary blade heating and dehumidifying test system as claimed in claim 3, wherein the heated steam is condensed into water in the water tank (5) after flowing out from the steam outlet (12) of the test piece (3), and the piping connected to the steam inlet (11) and the steam outlet (12) is made of flexible metal pipes to ensure the rotation of the test piece.
5. The static stationary blade heating and dehumidifying test system as claimed in claim 1, wherein the coordinate frame (4) comprises a base, a dial and a test piece holding arm, the holding arm is divided into an upper short arm and a lower long arm, one end of the lower long arm is vertically fixed to the base, the other end of the lower long arm is connected with the upper short arm through a bolt, an included angle between the short arm and the long arm is adjustable, the dial is arranged at a joint, an included angle between the long arm and the short arm is measured, and the other end of the short arm is vertically fixed to the test piece.
6. The static test system for heating and dehumidifying of the stationary blades as claimed in claim 1, wherein the water inlet regulating valve (6) is used for controlling the on-off of saturated water, and the atomizing nozzle (7) is used for spraying the saturated water on the surface of the stationary blade to form a water film.
7. A static test method of vane heating dehumidification, which is based on the static test system of any one of claims 1 to 6, and comprises:
1) designing and selecting an internal heating channel of the stationary blade by using a numerical simulation method, increasing a rib column turbulent flow structure when the internal channel of the blade adopts a U-shaped turning serpentine channel, designing the width-to-height ratio of the channel, adjusting turbulent flow structure parameters, performing preliminary calculation and comparison on different channel performances by using the numerical simulation method, selecting a design scheme with the best performance according to a numerical calculation result, and processing to obtain a test piece (3) required by testing;
2) carrying out a multi-parameter test on a test piece (3) on a test system
3) And analyzing the measurement results of the high-speed camera (8) and the thermal infrared imager (9), optimizing the heating channel structure in the blade by combining numerical simulation, and repeating the test to obtain the saturated steam pressure, the flow, the blade inclination angle and the influence rule of the channel structure on the water film evaporation speed and the water film evaporation process on the surface of the stationary blade.
8. The static testing method for stationary blade heating dehumidification according to claim 7, wherein the step 2) comprises the following steps:
(a) checking whether each component of the test system can normally run or not, and debugging the test and measurement system to reach the condition of normal test measurement; installing the test piece (3) on a coordinate frame (4) of the blade static heating and dehumidifying test system, horizontally placing the test piece (3) at the moment, enabling a pressure surface to face upwards, starting a high-speed camera (8) and a thermal infrared imager (9), and adjusting a placing angle and a placing distance to ensure that the high-speed camera and the thermal infrared imager can completely shoot the surface of the test piece (3);
(b) a steam boiler is used for generating heating steam with set pressure, the opening degree of a steam inlet adjusting valve (1) is adjusted, after the flow reading shown by a volume flow meter (2) is stabilized at the set parameter of the test, a water inlet adjusting valve (6) is opened, saturated water forms a water film on the surface of a blade in the form of water mist or water drops through an atomizing nozzle (7), and the shooting frame rate and the resolution of a high-speed camera (8) are set; starting a high-speed camera (8) and a thermal infrared imager (9) while closing the water inlet adjusting valve (6), and continuously shooting a water film evaporation process image of the surface of the static blade and a temperature distribution image of the surface of the static blade until water drops attached to the surface of the static blade disappear; closing the steam inlet regulating valve (1), and storing test data on a computer (10);
(c) adjusting the opening of the steam inlet adjusting valve (1) to change the steam flow, and completing test measurement under different saturated steam pressures and different flows according to the method in the step (b);
(d) adjusting the included angle between the upper short arm and the lower long arm of the clamping arm of the coordinate frame (4) to change the inclination angle of the test piece (3), adjusting the position of the atomizing nozzle (7), ensuring that a water film can be sprayed on the surface of the stationary blade, adjusting the positions of the high-speed camera (8) and the thermal infrared imager (9), and ensuring that the surface of the stationary blade can be completely shot; and (c) completing test measurement under different typical inclination angles according to the methods of the steps (b) and (c), and analyzing the influence of the heating steam pressure, the flow and the inclination angle of the blade surface on the water film evaporation speed.
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| JP2010116922A (en) * | 2010-01-08 | 2010-05-27 | San World:Kk | Steam turbine and its water droplet removing method |
| CN103437831A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| CN103760109A (en) * | 2013-12-30 | 2014-04-30 | 浙江大学 | Optoacoustic measurement method and device of humidity of wet steam |
| JP2015048716A (en) * | 2013-08-30 | 2015-03-16 | 株式会社東芝 | Steam turbine |
| CN110318825A (en) * | 2019-06-21 | 2019-10-11 | 西安交通大学 | A kind of whole circle leaf grating heating and blowing dehumidifying experimental system of steam turbine and test method |
| CN211008777U (en) * | 2019-11-25 | 2020-07-14 | 西安交通大学 | Hollow quiet leaf pressure surface suction dewatering structure of steam turbine |
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2021
- 2021-04-16 CN CN202110409488.3A patent/CN113153457B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010116922A (en) * | 2010-01-08 | 2010-05-27 | San World:Kk | Steam turbine and its water droplet removing method |
| CN103437831A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device |
| JP2015048716A (en) * | 2013-08-30 | 2015-03-16 | 株式会社東芝 | Steam turbine |
| CN103760109A (en) * | 2013-12-30 | 2014-04-30 | 浙江大学 | Optoacoustic measurement method and device of humidity of wet steam |
| CN110318825A (en) * | 2019-06-21 | 2019-10-11 | 西安交通大学 | A kind of whole circle leaf grating heating and blowing dehumidifying experimental system of steam turbine and test method |
| CN211008777U (en) * | 2019-11-25 | 2020-07-14 | 西安交通大学 | Hollow quiet leaf pressure surface suction dewatering structure of steam turbine |
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