A method for detecting the fastening tightness of motor parallel ring leads
A technology of link lead wire and detection method, which is applied in the direction of mechanical solid deformation measurement, etc., can solve the problems affecting the use effect of butterfly gaskets, affecting the safe operation of generators, exceeding the use limit, etc., so as to avoid generator failure and reduce operation dispersion sexual effect
Active Publication Date: 2016-08-17
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
The deformation of the disc washer directly affects the pre-tightening force of the parallel ring lead wires. If the pre-tightening force of the lead wires is insufficient, the long-term operation of the generator may cause insulation wear and lead wires to loosen, which will affect the safe operation of the generator; If the pre-tightening force of the lead wire is too large, it will affect the use effect of the butterfly washer, and even make the washer deform beyond its use limit
Method used
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Embodiment Construction
[0020] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.
[0021] figure 1 It is a flow chart of the method for detecting the tightness of the motor parallel ring lead wires provided by the present invention, figure 2 It is a schematic diagram of a Bakelite disc washer whose compression is to be measured. The disc washer is measured in two steps, which are two times before and after tightening the nut of the product with the specified torque. The maximum compression of a single disk washer is 0.8mm, and each screw rod is equipped with two convex disks installed opposite to each other at the position of the parallel ring lead plate. The maximum compression is 1.6mm in total. The specific operation of the detection method for the fixing tightness of the motor parallel ring lead wires is as follows:
[0022] Step 1: Before installation, spray lubricating spray on the front and back sides ...
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The invention provides a method for detecting the fixing tightness of the lead wires of parallel rings of motors. Before installation, spray lubricating spray on the front and back sides of the bakelite dish washer to be measured, and air dry; install the parallel ring pressing plate, and match the parallel ring and the pressing plate with pads The polyester felt impregnated with epoxy adhesive, to ensure that the polyester felt has a compression of 40% to 60%, install the tool bolts, and after the epoxy adhesive is completely cured, remove the tool bolts, replace the product screw, install the dish washer and nuts, and tighten them manually ; Then measure the distance from the nut to the disk washer before and after the product nut is tightened according to the torque, and finally calculate the deformation of the disk washer. The method provided by the present invention overcomes the deficiencies of the prior art. By measuring the shape variable of the dish washer, the size of the pretightening force of the pressure plate nut of the parallel ring lead wire can be effectively fed back, thereby reducing the dispersion of operation and effectively avoiding the problem of fixing the nut due to the parallel ring lead wire. Generator failure caused by abnormal preload.
Description
technical field [0001] The invention relates to a method for detecting the fixed pretightening force of parallel ring lead wires of a turbogenerator, which can judge whether the bakelite disc-shaped washer can reach the compression amount required by the drawings after the bakelite nut is tightened with a specified torque, and belongs to the technical field of generator manufacturing. Background technique [0002] In the design of conventional turbogenerators, disc washers are usually used to ensure the tightness of the parallel ring lead plate. During the stator embedding process, after the parallel ring lead clamp nut is tightened according to the specified torque, the dish washer will produce a certain amount of deformation. In the actual operation process, the shape, material, and even the placement method of the disc washer all affect the effect of the wrenching torque on the deformation. The deformation of the disc washer directly affects the pre-tightening force of t...
Claims
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IPC IPC(8): G01B5/30
Inventor 李磊蔡华芳沈兵王朝灿顾臻朱荣华
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD