Load-adjustable anti-loosening performance evaluation and detection device for electric power fasteners

Abstract

The invention discloses a load-adjustable anti-loosening performance evaluation and detection device for electric power fasteners. The device comprises a vibration main unit, a servo hydraulic system, a microcomputer and an electrical control system, the vibration main unit comprises a frame and a servo oil cylinder connected on one side of the frame, a piston rod of the servo oil cylinder is connected with a force transducer, the force transducer is connected with a connecting seat and a pulling plate, a through hole for a testing screw to pass through is arranged in the middle of the pulling plate, and a support plate is connected on the other side of the frame and movably connected below the pulling plate. Vibration load of the anti-loosening performance evaluation and detection device can be adjusted according to practical application occasions and borne vibration load characteristics of the electric power fasteners, so that evaluation and detection for the anti-loosening performance of the fasteners in connection are achieved.

Description

technical field [0001] The invention relates to the field of vibration tests, in particular to a device for evaluating and detecting the anti-loosening performance of electric fasteners. Background technique [0002] In the main equipment composition of the power system, various forms of fastener connections are almost always used. In the assembly of major electrical equipment, considering the design life of the equipment and the characteristics of operation and maintenance within its life cycle, riveting and bolting are the most common fastening forms, and riveting is mostly used in electrical equipment that requires high electric field distribution. In some occasions, the application of bolted connection is more extensive. The anti-vibration ability of electrical equipment and the anti-loosening performance of fasteners are more prominent in the structure of transmission towers. [0003] Due to the characteristics of meteorology and geography, it is easy to cause gallopi...

AI Technical Summary

Problems solved by technology

The test device is mainly a mechanical eccentric wheel structure driven by a motor. The size of the vibration load can only be adjusted by adjusting the driving radius (amplitude) of the motor. First, it is impossible to directly adjust and measure the size and waveform of the vibration load. Set the load according to the actual use conditions of the fastener connection and the change characteristics of the actual dynamic load during use

Second, the output of the clamping force change curve of the sample during the test is fixed-point sampling every second, which cannot reflect the dynamic change characteristics of the clamping force with the dynamic load

Third, the vibration test device driven by the motor is affected by the stress of the test piece and the friction during the transmission process during the working process, and the continuous working time is short (a few minutes), so it cannot achieve the prevention of "the number of continuous vibrations with complete loss of clamping force". loose performance evaluation model

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