A dynamic gap measuring instrument and its measuring method

Abstract

The invention relates to a dynamic clearance measuring instrument and a measuring method. The dynamic clearance measuring instrument comprises a clearance probe (4), an excitation assembly and a displacement measuring assembly; the excitation assembly comprises a vibrator (6), a vibrator fixing rod (7) and a vibration control loop (5), wherein the vibrator (6) is arranged on the vibrator fixing rod (7); the displacement measuring assembly includes an eddy current displacement sensor (3) and a displacement sensor fixing rod (2); the clearance probe (4) used for measuring a clearance is sheathed with the vibration control loop (5); the vibration control loop (5) is connected with the vibrator (6), so that the vibration response of the vibrator (6) can be transmitted to the clearance probe (4); and the eddy current displacement sensor (3) arranged on the displacement sensor fixing rod (2) measures the displacement response of the clearance probe (4).

Description

technical field [0001] The invention belongs to the field of measurement, in particular to a dynamic gap measuring instrument and a measuring method thereof. Background technique [0002] In the mechanical structure, due to the requirements of assembly and lubrication, gaps inevitably exist between the joint surfaces of various components. Due to the existence of the joint surface gap, under the action of external force and external torque, the joint parts will be offset relative to the joint surface, and this offset will inevitably lead to the deviation of the structural parts relative to the ideal position, resulting in a decrease in response accuracy. In addition, due to the influence of factors such as wear, thermal effects, and local deformation during the movement, the gap value will gradually increase, thereby continuously changing the force between the components, resulting in increased wear between components, and harsh noises will be generated at the same time. Se...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for gap measurement, but the main gap measurement devices and methods have the following deficiencies: the combination operation of the gap feeler gauge is complicated, the combination process will bring errors, and the measurement accuracy will be affected by human subjective factors and material properties. Influence; the accuracy of the image processing method is poor, and it can only measure the gap value of the outer edge of the mechanism gap; the digital vernier gap ruler cannot realize the accurate measurement of the small gap value due to the limitation of the thickness of the measuring head

This patent can detect the displacement of the hammer head in real time, but the patent cannot realize the accurate measurement of the small gap value

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