搜索
ss
ss
新闻中心
News
-
-
Performance characteristics of rigid rotor dynamic balance

Performance characteristics of rigid rotor dynamic balance
TopRecommend

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2021-04-24 18:36
  • Views:

(Summary description)For rotors whose working speed is much lower than the critical speed, the deformation caused by the unbalance is small. This kind of rotor can be treated as a rigid body, and the dynamic balance can be carried out at a low speed, which is called the dynamic balance of a rigid rotor. When the rigid rotor is dynamically balanced, the centrifugal inertial force system caused by the unbalanced amount of each micro-segment can be simplified to two arbitrarily selected sections.

Performance characteristics of rigid rotor dynamic balance
TopRecommend

For rotors whose working speed is much lower than the critical speed, the deformation caused by the unbalance is small. This kind of rotor can be treated as a rigid body, and the dynamic balance can be carried out at a low speed, which is called the dynamic balance of a rigid rotor. When the rigid rotor is dynamically balanced, the centrifugal inertial force system caused by the unbalanced amount of each micro-segment can be simplified to two arbitrarily selected sections.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2021-04-24 18:36
  • Views:

For rotors whose working speed is much lower than the critical speed, the deformation caused by the unbalance is small. This kind of rotor can be treated as a rigid body, and the dynamic balance can be carried out at a low speed, which is called the dynamic balance of a rigid rotor. When the rigid rotor is dynamically balanced, the centrifugal inertial force system caused by the unbalanced amount of each micro-segment can be simplified to two arbitrarily selected sections.

 

Make corresponding corrections (de-weighting or counterweighting) on ​​these two surfaces to complete the dynamic balance. In order to find the position and size of the imbalance on the two sections, a dynamic balancing machine can be used. Common dynamic balancing machines are divided into two types: soft support type and hard support type. The former detects the vibration caused by the unbalance; the latter detects the force of the unbalanced rotor on the support. The dynamic balance problem of the rigid rotor has been solved well.

The International Organization for Standardization (ISO) has stipulated the accuracy of the dynamic balance of various rigid rotors. Dynamic balance of the flexible rotor When a rotor working at a supercritical speed is started and braked, the speed must pass the critical speed. At this time, the unbalance will cause the rotor to deform significantly. If the deviation of the centroid of each micro-segment of the rotor on the axis of rotation has a significant impact on the deformation, the rotor cannot be treated as a rigid rotor, and the corresponding dynamic balance is called the dynamic balance of a flexible rotor.

Decompose the unbalance amount according to the natural vibration mode of each order of the rotor. If the rotational speed during dynamic balance is close to a certain critical rotational speed, the natural mode shape of this order protrudes above the other orders. By detecting the mode shape, the size and position of the correction mass needed to eliminate this order of unbalanced components can be found. Step by step, you can complete the dynamic balance.

相关资讯