Motor fan cover fixing device

Abstract

The invention discloses a motor fan cover fixing device. The motor fan cover fixing device comprises a motor shell, a rear end cover is arranged on the motor shell, a motor fan cover is arranged on the rear end cover, a fan is arranged in the motor fan cover, a rotor is arranged in the motor shell, the output end part of the rotor is connected with the fan, a group of annularly distributed fixed bases are arranged on the rear end cover, supporting bases corresponding to the fixed bases are arranged on the motor shell, and axial screw holes are formed in the supporting bases and the fixed bases; and a connecting piece is arranged on the fixed base, the connecting piece is connected with the fixed base and the supporting base through vertical connecting bolts, and the motor fan cover is connected with the side face of the connecting piece through horizontal connecting bolts. The rear end cover, the motor shell and the motor fan cover are mutually connected and fixed together through theconnecting pieces, the fixing firmness degree of the motor fan cover can be improved, and the operation reliability of the auxiliary engine of the generator is guaranteed; moreover, the screw loose phenomenon can be reduced, the maintenance cost is reduced, the service life of the motor is prolonged, and the maintenance efficiency is improved.

Description

technical field [0001] The invention relates to a motor fan cover installation component, in particular to a motor fan cover fixing device. Background technique [0002] Traditional hydropower plants generally install axial-flow propeller turbine generators to generate electricity. In order to ensure the safe production and stable operation of the power plant, the generators and their auxiliary equipment need to be inspected and maintained regularly. Among them, the repair and maintenance of the motor usually requires the removal of the motor fan cover to clean the motor fan and other components. The maintenance personnel found that after the motor fan cover has been disassembled and installed many times, the fixing screw is easily damaged by fatigue, resulting in the fan cover being unable to be fixed, causing the motor to run Generate abnormal vibration and reduce the life of the motor. At present, there are three main methods to solve the damage to the fixing screw hole ...

AI Technical Summary

Problems solved by technology

[0003] However, since the rear end cover is an unconventional spare part, the procurement cycle is long; and the method of replacing the motor is expensive and laborious, and the price of the motor in the supermarket catalog of material procurement is often thousands of dollars.

Therefore, compared to the first two solutions, reaming and tapping on the fixed hole of the windshield is relatively fast and simple, and it is cost-effective. It is currently the most commonly used processing method; the process of reaming and tapping can be divided into Five steps: remove the rear end cover screws (requires 5 minutes), disassemble the motor fan and rear end cover (requires 25 minutes), reaming and tapping (requires 65 minutes), motor fan and rear end cover It takes about 120 minutes to reassemble (requires 15 minutes) and windshield reinstallation (requires 10 minutes), which is a long time and low efficiency; the fixing screw hole of the windshield is damaged, and a fixing screw needs to be redesigned. The method of reaming and tapping belongs to the processing on the original hole position. It is difficult to ream and tap on cast iron parts, and it is easy to fail; moreover, since the damage to the fixing screw hole of the windshield is generally an emergency, the maintenance personnel During daily maintenance and overhaul, the corresponding reaming tools are not carried with you. The reaming and tapping process requires the maintenance personnel to find the corresponding tools, which will not only affect the reaming efficiency, but also increase the difficulty of reaming.

Therefore, the existing technology has the problems of low efficiency and great difficulty

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