Variable-angle umbrella type flow guide device for water outlet pipe of bulb tubular turbine
A diversion device and type water turbine technology, which is applied in the direction of reaction engines, safety devices, mechanical equipment, etc., can solve the problems of flow disorder and poor pressure pulsation characteristics, and achieve the effect of improving the flow state
Pending Publication Date: 2022-03-18
福建华电电力工程有限公司 +1
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Problems solved by technology
[0003] The purpose of the present invention is to solve the technical problems of disordered flow state and poor pressure pulsation characteristics in the outlet pipe of the bulb tubular turbine under partial working conditions and low water head, and to provide a tube for the outlet pipe of the bulb tubular turbine. Variable angle umbrella deflector
Method used
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Embodiment 1
[0040] The pressure pulsation characteristics of a bulb tubular turbine in a hydropower station are studied. When the outlet pipe of the turbine is not equipped with a diversion device, the turbine model 1 is established through simulation software, including four inlet pipes, movable guide vanes, runners, and outlet pipes. In the first part, the unsteady value of model 1 is simulated within 7.68s for 12 cycles under the rated working condition; at the same time, the real machine test of the hydropower station is carried out under the same parameters.
[0041] The results show that the relative error of the time-domain data of the pressure fluctuation monitoring points of the movable guide vane inlet, runner inlet, and outlet pipe inlet of the bulb tubular turbine of the hydropower station and the real machine test data is within 5%, and the waveforms are basically consistent. The consistency of primary and secondary frequencies proves that the established model is accurate and...
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The variable-angle umbrella type flow guide device is arranged at a water inlet of the water outlet pipe, the two ends of a main rod of the flow guide device are each connected with a fixing rod, the top ends of the two fixing rods are connected to the top wall of the water outlet pipe, and the whole flow guide device is hung in the water outlet pipe in the water flow direction; one end of each connecting rod is hinged to one end, connected with the first fixing rod, of the main rod, and the other end of each connecting rod is connected with one guide vane; one end of each supporting rod is hinged to the inner side of the corresponding guide vane, and the other end of each supporting rod is hinged to the clamping ring; one end of the adjusting rod is hinged to the second fixing rod, the other end of the adjusting rod is hinged to the clamping ring, the adjusting rod can slide up and down relative to the second fixing rod, the adjusting rod pushes the clamping ring to slide, and the included angle between the guide vane and the main rod is changed. The flow guiding device can be automatically adjusted to different blade angles according to the flow monitored in real time, water flow is guided, and the flow state of the water outlet pipe is improved.
Description
technical field [0001] The invention belongs to the technical field of diversion of water turbine outlet pipes, and in particular relates to a variable-angle umbrella-type diversion device for the outlet pipe of a bulb tubular water turbine. Background technique [0002] The flow state of the bulb tubular turbine is very complicated in actual operation. Under non-design conditions, the flow line distribution of the outlet pipe is uneven and the flow state is poor. In severe cases, it will cause vortices and affect the stable operation of the unit. Therefore, it is necessary to study the flow guide device. Guide the water flow of the outlet pipe, improve the flow state, and improve the stability of the unit operation. Contents of the invention [0003] The purpose of the present invention is to solve the technical problems of disordered flow state and poor pressure pulsation characteristics in the outlet pipe of the bulb tubular turbine under partial working conditions and ...
Claims
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IPC IPC(8): F03B3/18F03B3/04F03B15/00F03B11/00G06F30/28G06F30/17
CPCF03B3/183F03B3/04F03B15/00F03B11/008G06F30/28G06F30/17Y02E10/20
Inventor 黄立芹范志锋林巧锋陈齐灯黄叶雯芦月张玉全郑源张震
Owner 福建华电电力工程有限公司