Influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting

Abstract

The invention discloses an influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting. The influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting comprises the steps that 1, designating a shafting balancing revolving speed point, balancing planes and numbers of measured points; 2, an initial deflection value of a spindle and an initial vibration value are measured under a slow revolving speed of 300rpm; 3, a vibration response of the measured points on a bearing after trial mass is conducted on a plurality of balancing planes on the shafting; 4, the minimum value of the residual vibration amplitude epsilon of all vibration measured points after the rotor is balanced is set as a goal, a vibration response vector equilibrium equation is established, and a size and angel of a balance weight Q on the unit shafting are obtained; 5, the vibration value of all vibration measured points are read, the above steps 2, 3, and 4 can be repeated once the value is unsatisfied. The influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting has a overall consideration on vibration with multiple plane, multiple-points and multiple revolving speed shafting, and a seesaw phenomenon in the traditional dynamic balance process is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of mechanical dynamic balance, and in particular relates to a multi-plane, multi-measuring point, multi-rotational speed shafting influence coefficient dynamic balancing method for a rotary machine. Background technique [0002] In the process of dynamic balancing of rotating machinery shafting, it is often required to balance the rotor at multiple speeds to avoid the "seesaw" phenomenon, that is, the vibration is reduced at one speed, but the vibration is increased at another speed. Moreover, it is also required that the number of weighted planes should not be less than the order of the highest mode shape of the rotor to be balanced. Generally, flexible rotors need to consider the first three mode shapes, so at least three balance planes are required. In addition, due to the inconsistent dynamic characteristics of the support system in the vertical and horizontal directions, generally each bearing will be i...

AI Technical Summary

Problems solved by technology

The existing influence coefficient dynamic balance calculation methods and the corresponding developed programs are difficult to meet

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