I believe that after reading this article that Huashun teaches you how to choose the right balance machine, users have clearly understood the purpose of the balance machine. Correcting the imbalance of the rotor according to the data measured by the balancing machine can improve the mass distribution of the rotor relative to the axis, and reduce the vibration generated during the rotation of the rotor or the vibration force acting on the bearings to within the allowable range. Therefore, the balancing machine is an indispensable device for reducing vibration, improving performance and improving quality.
Generally, the balance of the rotor includes two steps of measuring and correcting the unbalance. The balance machine is mainly used for the measurement of the unbalance. The correction of the unbalance is often made by other auxiliary equipment such as drilling machines, milling machines and spot welding machines, or by manual The method is complete; some balancing machines have made the calibration device a part of the balancing machine.
Gravity balancers and centrifugal balancers are two types of typical balancers. Gravity balancers are generally called static balancers. They rely on the gravity of the rotor to measure the static imbalance. The balanced rotor is placed on a support supported by a hydrostatic bearing, and a reflector is embedded under the support. When there is no imbalance in the rotor, the light beam emitted by the light source is reflected by this mirror and then projected at the polar coordinate origin of the imbalance indicator.
If the rotor has an unbalanced amount, the rotor support will tilt under the action of the unbalanced heavy moment, and the reflector under the support will also tilt and deflect the reflected beam, so that the light cast on the polar indicator Click to leave the origin. According to the coordinate position of this light spot deflection, the magnitude and position of the imbalance amount can be obtained.
The gravity balance machine is only suitable for some disc-shaped parts with low balance requirements. For rotors with high balance requirements, centrifugal single-sided or double-sided balancers are generally used.
The centrifugal balancer measures the imbalance according to the support vibration caused by the rotor imbalance or the vibration force acting on the support while the rotor is rotating. According to the number of correction planes, it can be divided into single-sided balancing machines and double-sided balancing machines. The single-sided balancing machine can only measure the imbalance (static unbalance) on one plane. Although it is measured when the rotor is rotating, it is still a static balancing machine. The double-sided balancing machine can measure dynamic imbalance, and can also measure static imbalance and even imbalance, which are generally called dynamic balance machines.
Centrifugal force type balancing machines can be divided into soft supporting balancing machines and hard supporting balancing machines according to different supporting characteristics. The balance speed is higher than the natural frequency of the rotor-supporting system. This kind of balancing machine has a small support stiffness, and the signal detected by the sensor is proportional to the vibration displacement of the support. The balance speed lower than the natural frequency of the rotor-supporting system is called a hard-supported balancer. The support rigidity of this balancer is large, and the signal detected by the sensor is proportional to the vibration force of the support. According to the needs of mass production, an automatic balancer that can automatically complete balance measurement and balance correction for a specific rotor, and an automatic balance line. Hyundai has already been equipped in a large number of industrial sectors such as automobile manufacturing and motor manufacturing.