Self-supporting bearing vibration measuring device

Abstract

The invention discloses a self-supporting vibration measuring device for bearings, which includes a frame, a platform, a motor transmission mechanism, a loading and unloading device, a sensor and an electric measuring device, and is characterized in that it also includes a lower bearing, a shaft coupling, a flywheel, and an auxiliary device. , a supporter, a quick-change mandrel and a suspension shaft, wherein the coupling is a movable elastic coupling, including two upper and lower half couplings, and the upper half coupling is a flywheel, and the flywheel and the suspension The lower end of the shaft is rigidly connected, the upper end of the suspension shaft is socketed with the quick-change mandrel, the mandrel supports the bearing to be tested, the bearing to be tested is supported on the supporter, and the supporter is installed on the platform; the lower half coupling passes through the half shaft It is supported in the lower bearing and connected with the motor transmission mechanism. The invention adopts the self-supporting structure of the suspension shaft and the bearing under test, which frees the vibration measurement of the bearing from the constraint of the precision main shaft, relies on the bearing's own parameters to rotate, eliminates the interference of the coaxiality of the main shaft and its vibration, and further improves the measurement accuracy .

Description

technical field [0001] The invention relates to a device for measuring mechanical vibration by detecting changes in electrical characteristics. It is a bearing vibration measuring instrument that uses the bearing itself to support the drive shaft to rotate, thereby reducing the measurement error caused by the coaxiality and vibration of the main shaft. Background technique [0002] In the prior art, the measurement of bearing vibration all adopts low-vibration precision spindle as the supporting shaft of the bearing under test. The measurement error caused by the coaxiality of the spindle and vibration is difficult to eliminate, thus limiting the accuracy of bearing vibration measurement. improve. In order to overcome the error caused by the spindle to the measurement, the most reliable way is to cancel the spindle seat, directly support the support shaft in the bearing under test, and make the bearing under test rotate with its own performance parameters. Contents of the ...

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Problems solved by technology

[0002] In the prior art, the measurement of bearing vibration all adopts low-vibration precision spindle as the supporting shaft of the bearing under test. The measurement error caused by the coaxiality of the spindle and vibration is difficult to eliminate, thus limiting the accuracy of bearing vibration measurement. improve

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