Hydro-generator coupling bolt elongation value measurement technique
A technology for hydraulic generators and coupling bolts, which is applied in the direction of mechanical solid deformation measurement, etc., and can solve problems such as fracture of coupling bolts, failure to reach the pre-tightening force of coupling bolts, and inability to accurately measure the elongation of coupling bolts, etc. , to achieve high reliability, high measurement reliability, and shorten the installation period
Inactive Publication Date: 2016-03-30
HARBIN ELECTRIC MASCH CO LTD
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Problems solved by technology
In the past, the method of measuring the elongation value of the coupling bolt of the hydro-generator was to fix the dial indicator on the upper surface of the coupling bolt and directly measure it. When the hydraulic tensioner is used to stretch the coupling bolt, the lower part of the coupling bolt also has an upward movement. , so this measurement method cannot accurately measure the elongation of the coupling bolt
This conventional method fails to achieve the expected pretightening force of the coupling bolt and may even cause serious consequences of coupling bolt fracture
Method used
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[0012] Such as figure 1 As shown, a method for measuring the elongation value of the coupling bolt of a hydro-generator comprises the following steps: 1) the length measuring rod 4 is installed in the central hole of the coupling bolt 5, and the dial indicator seat 2 is fitted on the coupling bolt through threads. In the central hole of the shaft bolt 5, the dial indicator 1 is fixed on the dial indicator seat 2 by using the M4×14H62 round head screw 3, and the pointer head of the dial indicator 1 is placed on the upper end surface of the length measuring rod 4;
[0013] 2) if figure 2 As shown, the manual high-pressure oil pump 6 is connected to the hydraulic tensioner 8 through the oil pipe 7, and the hydraulic tensioner 8 is assembled and connected to the coupling bolt 5. The hydraulic tensioner 8 is used to stretch the coupling bolt 5, and the coupling bolt 5 is connected to the measuring Long rod 4 moves up, and this moment, dial indicator 1 reading is the elongation of...
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The invention relates to a hydro-generator coupling bolt elongation value measurement technique. A length measuring rod is installed in the center hole of a coupling bolt, a dial indicator is fixed on a dial indicator base by a half-round screw, and the pointer head of the dial indicator presses against the upper end of the length measuring rod. When a hydraulic stretcher stretches the coupling bolt, the coupling bolt and the length measuring rod move upward, and the reading of the dial indicator at the moment is the elongation of the coupling bolt. The method can ensure that the pre-tightening force of the coupling bolt reaches a desired value. Moreover, the method has the advantages of installation period shortening and simple and convenient operation, and is of very high application value.
Description
technical field [0001] The invention relates to a process method for measuring the elongation value of coupling bolts of a hydroelectric generator. Background technique [0002] With the increase of unit unit capacity, the diameter of the coupling bolts of hydro-generator units is getting larger and larger, and the requirements for elongation measurement are getting higher and higher. In the past, the method of measuring the elongation value of the coupling bolts of hydro-turbine generators was to fix the dial indicator on the upper surface of the coupling bolts and measure directly. Because when the coupling bolts are stretched by a hydraulic tensioner, the lower part of the coupling bolts also has an upward movement. , so this measurement method cannot accurately measure the elongation of the coupling bolt. This conventional method fails to achieve the expected pretightening force of the coupling bolt, and may even cause serious consequences of coupling bolt fracture. C...
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Login to View More IPC IPC(8): G01B5/30
CPCG01B5/30
Inventor 赵海军王新洪李贺唯马云鹏周峰
Owner HARBIN ELECTRIC MASCH CO LTD