An all-round measurement device for bearing noise of a double-axis coil motor

Abstract

The invention discloses a double-shaft coil motor bearing noise omnibearing measurement device which comprises a base, sliding blocks, a lifting frame, a main working table, a driving motor and noisedecibel meters. A supporting table is arranged on the lifting frame; the supporting table is fixedly connected with the lifting frame by a screw; a groove is formed at the center position on the uppersurface of the supporting table; the supporting table is arranged inside the groove; screw thread sliding blocks are also mounted on a second screw rod by screw threads; and the noise decibel metersare fixedly mounted at the lower side of a second limiting pillar. By enabling the noise decibel meters to translate left and right, the requirement for multi-dimension testing is met, a decibel valueof bearing noise at each point is effectively measured and accuracy of noise measurement is improved; moreover, the noise decibel meters are arranged at both sides of a to-be-measured motor, and by carrying out comparison testing and obtaining an average value, testing accuracy is greatly improved; and by driving the to-be-measured motor to rotate, the to-be-measured motor is subjected 360-degreefull-degree measurement, and by multiple groups of data of different angles, the bearing noise is further accurately evaluated.

Description

technical field [0001] The invention relates to the field of motors, in particular to an omnidirectional measuring device for bearing noise of a double-axis coil motor. Background technique [0002] According to the different ways of motor noise generation, its noise can be roughly divided into three categories: ① electromagnetic noise; ② mechanical noise; ③ aerodynamic noise. Electromagnetic noise is mainly generated by the radial component of the air gap magnetic field acting on the stator core. It propagates outward through the yoke, causing the stator core to vibrate and deform. The second is the tangential component of the air gap magnetic field, which is opposite to the electromagnetic torque and causes the local deformation and vibration of the iron core teeth. When the radial electromagnetic force wave is close to the natural frequency of the stator, it will cause resonance, greatly enhance the vibration and noise, and even endanger the safety of the motor. When t...

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Problems solved by technology

When the radial electromagnetic force wave is close to the natural frequency of the stator, it will cause resonance, greatly enhance the vibration and noise, and even endanger the safety of the motor

When the motor leaves the factory, it is often necessary to detect the noise of the motor. The existing noise detection generally uses a hand-held noise tester to test the motor at multiple points, but the hand-held noise tester has a greater impact on the noise, resulting in inconsistent test results. exact situation

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