Blade rotating speed measuring device

Abstract

The invention relates to a blade rotating speed measuring device. The blade rotating speed measuring device comprises a stepped sleeve (1), blades (2), a bolt (3), a shaft (4), a nut (5), a first bearing (6), a second bearing (7), a fixation fluted disc (8), a thrust washer (9), a rotating speed sensor (10), a nut (11), a seal disc (12) and a screw(13). The inside portion of the stepped sleeve (1) is provided with a through hole. The shaft (4) runs through the through hole in the stepped sleeve (1). One end of the shaft (4) is connected with the blades (2) through the bolt (3). The stepped hole in one end of the stepped sleeve (1) is provided with the second bearing (7) and the fixation fluted disc (8) from inside to outside, and the stepped hole in the other end of the stepped sleeve (1) is provided with the first bearing (6) and the nut (5) from inside to outside. The stepped sleeve (1) is locked with the shaft (4) through the thrust washer (9) and the nut (11). The rotating speed sensor (10) is arranged on one side of the stepped sleeve (1) and in contact with the fixation fluted disc (8). The blade rotating speed measuring device of the invention can be used to ensure that the rotation shaft does not shaken and in stable condition during measurement so as to realize the accurate measurement of the rotating speed.

Description

technical field [0001] The invention belongs to the field of rotating speed measuring equipment, and in particular relates to a blade rotating speed measuring device. Background technique [0002] The original blade anemometer measurement device is to fix a dumbbell-shaped blade with screws on the top of a Φ8mm shaft with a length of 254mm, and install the bottom on an oil-free bearing. Output, get the value required by the measurer. For the measurement of the blade speed, the smaller the diameter of the shaft where the blade is installed, the better, so that the error caused by the weight of the shaft itself will be reduced, but the diameter of the shaft where the blade is installed is small and long, and the strength is difficult to guarantee, which can easily cause the top When the vane is installed, it vibrates when rotating, which causes the distortion of the rotational speed measurement, thus affecting the measurement accuracy. [0003] In order to ensure that the m...

AI Technical Summary

Problems solved by technology

For the measurement of the blade speed, the smaller the diameter of the shaft where the blade is installed, the better, so that the error caused by the weight of the shaft itself will be reduced, but the diameter of the shaft where the blade is installed is small and long, and the strength is difficult to guarantee, which can easily cause the top Vibration when the blade is installed rotates, causing distortion of rotational speed measurement, thus affecting measurement accuracy

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