A large-scale Francis hydro-generator water thrust online monitoring test method
A hydroelectric generator and test method technology, applied in hydroelectric power generation, engine components, machines/engines, etc., can solve the problems of large sand concentration in the passing machine, inability to determine the sand concentration in the passing machine of the unit, and inability to accurately quantify the impact , to achieve intuitive results analysis, convenient test methods, and intuitive test results
Active Publication Date: 2020-09-01
HARBIN ELECTRIC MASCH CO LTD
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Problems solved by technology
[0003] In Liujiaxia Taohe Estuary Sand Discharge Tunnel and Machine Expansion Project, after the completion of sand discharge in the sand discharge tunnel, a large amount of sediment (about 300 meters in length) was accumulated at the surge shaft gate from the power generation tunnel and the sand discharge tunnel bifurcation pipe. The sand concentration in the engine is too large, and it is impossible to determine the sand concentration of the unit during this process, and it is also impossible to accurately quantify the impact of a large sand concentration on the thrust bearing
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[0024] Such as figure 1 and figure 2 The shown large-scale Francis hydro-generator water thrust online monitoring test method is characterized by:
[0025] 1) Determine the placement position of the sensor: determine the position of the deformation sensor 1 on the main body structure of the hydro-generator, select the lower frame with the most sensitive deformation, and select four symmetrically distributed relative coordinates X and Y axes on the lower frame. The four support arms 5 place the measuring points and number each support arm 5. Each support arm 5 is located directly below the center body of the thrust bearing, 140-160mm away from the lower edge of the support ring plate of the center body of the thrust bearing, and 140-160 mm away from the inner edge of the lower frame. The area of 200-250 mm is the test area where the deformation sensor 1 is placed, and this area on both sides of each support arm 5 is marked;
[0026] 2) Coarse grinding of measuring points: ...
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Abstract
The invention discloses a hydraulic thrust online monitoring and testing method for a large mixed-flow hydro-generator. The hydraulic thrust testing method acquires thrust load quantized data to further acquire hydraulic thrust data by adopting a method of measuring deformation in axial vertical direction of a rack under the mixed-flow hydro-generator. The testing method is convenient and effective and can acquire hydraulic thrust and thrust load data and a trend curve, and the acquired thrust load data can provide a powerful data ground for determining whether a bearing part needs to be replaced or not in reformation of capacity expansion of the hydro-generator, for the analysis of relationship between the hydraulic thrust and sediment passing through the generator, and for precaution ina flood season, thereby providing a reliable testing method and a testing technological means for safe operation and reformation of capacity expansion of the hydro-generator. The method has a very good application prospect.
Description
Technical field: [0001] The invention relates to an on-line monitoring test method for water thrust of a large mixed-flow hydroelectric generator. Background technique: [0002] The Yellow River is the river with the largest sediment content in the world. The hydropower stations along the river have a very large amount of sediment in the process of power generation during the flood season, which has caused great harm to the safe operation of the units of the coastal power stations. In addition to the Yellow River Basin, hydropower stations located in Yunnan and areas with poor water quality are also facing same problem. The speed of the turbine is high, and there is a lot of silt passing through the machine, which will cause serious wear and tear of the runner. With the wear of the runner anti-leakage sealing device, the gap increases and the water leakage increases, resulting in a decrease in unit output and efficiency. At the same time, the water pressure of the top cover...
Claims
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IPC IPC(8): F03B11/00F03B13/00G01L5/00
CPCF03B11/008F03B13/00G01L5/0038Y02E10/20
Inventor 梁彬李志和胡丽杰韩波苟智德李丹华兰波沈坤鹏曹泽伦刘继惠杨国昌
Owner HARBIN ELECTRIC MASCH CO LTD