Test device for bending vibration fatigue characteristics of ball-joint hanging rings in power transmission lines

Abstract

The invention relates to a testing device for a ball eye flexural vibration fatigue characteristic in a power transmission line, belonging to the technical field of detection of power transmission line hardware, wherein a motor output shaft is linked with a bearing, and an eccentric shaft top block is arranged at the end part of the bearing. An upper air cylinder and a lower air cylinder are fixed on a device bracket, an upper sliding block and a lower sliding block are arranged at end parts of a mandril of the upper air cylinder and a mandril of the lower air cylinder, test sample colliding blocks are fixedly arranged on end faces of the upper sliding block and the lower sliding block, and a to-be-tested ball eye is arranged between the two test sample colliding blocks. The eccentric shaft top block at the end part of the bearing is arranged at one side of a test sample chuck. An oil cylinder is arranged at the other side of the test sample chuck, a piston of the oil cylinder is connected with a to-be-tested ball, and the end part of the ball of the to-be-tested ball eye is embedded in a groove of the test sample chuck. The testing device can be used for applying an impaction force and a tensioning force to the ball eye, and simulating a use tension of an actual line and use states under various complicated use conditions; various testing data of service life and fatigue resistance of the ball eye can be theoretically obtained within the shortest time.

Description

technical field [0001] The invention relates to a test device for the bending vibration fatigue characteristics of a ball joint hanging ring in a power transmission line, and belongs to the technical field of power transmission line hardware detection. Background technique [0002] The ball joint link is the key fitting for connecting insulators and towers in overhead transmission lines. In fact, during the suspension process, the wire will generate continuous vibration due to wind speed, wind direction and other reasons. The various mechanical forces generated by the vibration of the wire will form a dynamic load on the ball joint link connecting the insulator and the tower. The ball joint ring bears the irregular alternating load caused by the vibration of the wire for a long time, which will cause the fatigue of the hardware, and in severe cases, it will break. However, the ball joint link is located at the connecting part of the insulator and the pole tower, and its fa...

AI Technical Summary

Problems solved by technology

[0005] (1) This device is not designed for the ball joint ring, it can only detect the performance of the material itself, and cannot apply tension to the sample at the same time, so it cannot simulate the actual operating conditions of the ball joint ring very well, and the experimental data obtained are not accurate. precise

[0006] (2) The device directly causes the application of bending fatigue force by the rotation of the eccentric wheel and the main shaft. Without the pressure control system, the force applied to the sample cannot be quantitatively set, and the measurement data is inaccurate.

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