Metal wire vibration fatigue testing machine and metal wire vibration fatigue test method
A metal wire, vibration fatigue technology, applied in the direction of analyzing materials, testing the strength of materials by applying repetitive force/pulsation force, instruments, etc., can solve the problems of long test period and high cost, and achieve simple method, short sample, and test Inexpensive effect
Active Publication Date: 2018-09-25
上海国缆检测股份有限公司 +1
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Problems solved by technology
The test strand needs at least 50 meters, the test period is long and the cost is high
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[0054] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0055] Please refer to attached picture. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. within the scope covered by the disclosed technical content. At the sa...
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Abstract
The invention provides a metal wire vibration fatigue testing machine and a metal wire vibration fatigue testing method. The testing machine comprises a driving system and a tension loading device which are opposite, a controller and a display device. The driving system comprises a swing motor, a reversing motor and a driving part reversing plate. The output end of the swing motor is connected with the reversing motor. An output shaft of the reversing motor is connected with the driving part reversing plate. The tension loading device comprises a force measuring device, an elastic element and a slide support which are sequentially connected. The side, away from the elastic element, of the slide support is movably connected with a loading part reversing plate. The swing motor, the reversing motor and the force measuring device are all connected with the display device. The controller is connected with the swing motor, the reversing motor and the force measuring device. The testing machine and the testing method have the advantages that the device and the method are simple, samples are required to be short and small, and test expenses are low; the fatigue strength and fatigue service life of metal wires under various stress can be tested.
Description
technical field [0001] The invention relates to the technical field of material testing, in particular to a metal wire vibration fatigue testing machine and a metal wire vibration fatigue testing method. Background technique [0002] The overhead ground wire is the main equipment component of the transmission line. During the operation of the line, due to the action of the breeze, Karman eddy currents will be generated on the back of the ground wire, and an alternating force acts on the lateral direction of the ground wire. When the frequency of this alternating force is consistent with the natural frequency of the ground wire, the synchronization effect occurs in the ground wire to generate breeze vibration. After the breeze vibration occurs, the ground wire bends and deforms, and the wire strands add dynamic bending strain in addition to the original static forces, such as main tension, bending stress at the clamp, and extrusion force. The bending stress is also greater. ...
Claims
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IPC IPC(8): G01N3/32G01N3/26
CPCG01N3/26G01N3/32
Inventor 刘磊党朋李斌黄国飞王国利
Owner 上海国缆检测股份有限公司