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Selection and determination of rotor balance

Selection and determination of rotor balance
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  • Categories:news
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  • Time of issue:2021-04-17 18:42
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(Summary description)In the related problems of dynamic balancing machine detection: common machinery contains a large number of rotating parts, such as various transmission shafts, main shafts, electric motors, and steam turbine rotors, which are collectively referred to as rotating bodies. Under ideal circumstances, the pressure on the bearing is the same when the revolving body rotates and when it is not rotating. Such a revolving body is a balanced revolving body.

Selection and determination of rotor balance
Top

In the related problems of dynamic balancing machine detection: common machinery contains a large number of rotating parts, such as various transmission shafts, main shafts, electric motors, and steam turbine rotors, which are collectively referred to as rotating bodies. Under ideal circumstances, the pressure on the bearing is the same when the revolving body rotates and when it is not rotating. Such a revolving body is a balanced revolving body.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2021-04-17 18:42
  • Views:

In the related problems of dynamic balancing machine detection: common machinery contains a large number of rotating parts, such as various transmission shafts, main shafts, electric motors, and steam turbine rotors, which are collectively referred to as rotating bodies. Under ideal circumstances, the pressure on the bearing is the same when the revolving body rotates and when it is not rotating. Such a revolving body is a balanced revolving body.

 

However, due to uneven materials or blank defects, errors in processing and assembly, and even asymmetrical geometric shapes in the design of various rotating bodies in engineering, when the rotating body is rotating, every The centrifugal inertial force generated by the small particles cannot cancel each other out. The centrifugal inertial force acts on the machine and its foundation through the bearing, causing vibration, generating noise, accelerating bearing wear, shortening the life of the machine, and causing destructive accidents in severe cases.

For this reason, the rotor must be balanced to reach the allowable balance accuracy level, or the resulting mechanical vibration amplitude should be reduced within the allowable range. The difference between rotor dynamic balance and static balance. Correction and balance are performed on a correction surface of the rotor, and the residual unbalance after correction is to ensure that the rotor is within the specified range of allowable unbalance when it is static. It is static balance and is also called single-sided balance.

Perform correction and balance on both correction surfaces of the rotor at the same time, and the residual unbalance after correction to ensure that the rotor is in the specified range of the allowable unbalance when it is dynamic. It is dynamic balance and is also called double-sided balance. How to choose the balance method of the rotor is a key issue. The choice has this principle: as long as the rotor can be statically balanced under the premise of the needs of the use after the rotor is balanced, then dynamic balance should not be performed, and dynamic balance should not be used for static and dynamic balance. The reason is simple. Static balance is easier to do than dynamic balance, which saves effort, effort, and expense.

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