Stiffness curve test method for axial displacement of micro bearing under continuously progressively increased axial force

Abstract

The invention discloses a stiffness curve test method for the axial displacement of a micro bearing under continuously progressively increased axial force and relates to a test device and a monitoring device. A force measurement sensor is connected to the output shaft end of a cylinder, so that the cylinder, the force measurement sensor, the micro bearing and a displacement sensor are positioned on the same perpendicular line; the force measurement sensor can directly measure the axial tension generated by the cylinder; therefore, the advantage that the tension measured by the force measurement sensor is the axial force applied to the micro bearing can be achieved; the possible influence caused in other indirect processes can be effectively eliminated; the measured axial force is direct and reliable; the axial force is measured and recorded by the force measurement sensor; the displacement sensor also records the axial displacement of the micro bearing under the corresponding axial force in real time; finally, a stiffness curve is automatically generated through storage and processing of a computer; the stiffness curve supplies an important reference basis to optimizing the design of the micro bearing, reducing the noise of the micro bearing and prolonging the service life of the micro bearing.

Description

technical field [0001] The invention belongs to the technical field of bearing detection, and in particular relates to a stiffness curve test method for axial displacement of miniature bearings under continuous increasing axial force. Background technique [0002] It is very important to improve the bearing design to fix the outer ring of the tested bearing, apply a continuous incremental axial force to the inner ring of the tested bearing and measure the axial displacement of the inner ring. The test shows that the axial displacement is obvious at the initial stage. Measurable, but with the continuous increasing axial force, its axial displacement gradually decreases until it approaches zero. The relationship curve between the continuously increasing axial force and the corresponding axial displacement with the test time is referred to is the stiffness curve. [0003] The stiffness curve can reflect from one side the range of axial displacement that the bearing can withst...

AI Technical Summary

Problems solved by technology

[0004] There is no test equipment dedicated to the stiffness curve of miniature bearings in China. This is because people do not have high requirements for it. Even if there is a requirement, it is usually easy to measure the shaft by hanging weights on the inner ring of miniature bearings and using a dial gauge. Although the weight of the weight can be adjusted artificially, the adjustment of the weight of the weight is not a continuous continuous process, so the drawn stiffness curve is mostly non-curved, and the non-curved stiffness curve can improve the design of miniature bearings. It is not meaningful

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