Couplings change rotational inertia to avoid resonance_日照市晨晖橡塑制品有限公司

Couplings change rotational inertia to avoid resonance

Published:

2022-11-04

　　Coupling in the work, the periodic load is a more typical form of load in mechanical transmission, the coupling cycle load change frequency and the transmission shaft system to stagger the inherent frequency. Generally, the purpose of not resonating is achieved by changing the inherent frequency of the shaft system, and changing the inherent frequency of the shaft system is generally to change the rotational inertia or stiffness of the shaft system, the rotational inertia is related to the mechanical structure, and any variable torque can produce the effect of vibration reduction, which is difficult to achieve by changing the rotational inertia, while the stiffness of the shaft system can be easily changed. purpose.
　　Bearing seat vibration for a long time to produce offset, due to the large fan vibration is inevitable, so it is easy to cause the base fastening bolts slightly loose, the consequence is to cause misalignment and vibration. Bearing seat and base bolts fastening should be closely fit, with 0.05mm stopper check shall not be stuffed. The main motor itself caused by the large motor on the dynamic balance itself requires better, long time running due to various reasons, the motor itself dynamic balance damage and require misalignment. Start and stop or lift speed process improper operation, thermal expansion is not uniform or stay in the critical area for too long.
　　The output shaft side of the motor also has obvious vibration, the induced draft fan and motor coupling disconnected, the motor single operation, vibration disappeared. Re-correct the coupling center and adjust, reduce the induced draft fan and motor shaft eccentricity, and reasonably reserve the clearance between the induced draft fan and motor coupling. As the load changes, the amplitude is small at idle and large at full load, and the larger the shaft center deviation, the larger the vibration. The radial displacement of the two shaft centers shall not be greater than 0.03mm, and the contact between the two half-coupling end surfaces shall be tight. Coupling keyway type fixed, suitable for high torque transmission, in order to prevent axial sliding, usually with positioning screw fixed and clamping screw fixed and used.

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Couplings change rotational inertia to avoid resonance