Rotary machinery dynamic balance quick weight-countering adjustment device and method

Abstract

The present invention discloses a rotary machinery dynamic balance quick weight-countering adjustment device. The device comprises a balance disc and at least one pair of weight-countering adjusting components mounted on the balance disc, wherein the weight-countering adjusting components are distributed at equal intervals along the radial direction of the disc surface of the balance disc. According to the rotary machinery dynamic balance quick weight-countering adjustment device of the invention, after weight-countering mass, a weight-countering position and a weight-countering angle are obtained through a traditional dynamic balance algorithm, counterweights are not needed to be temporarily processed on a site, operation such as welding the counterweights is not required, and therefore, field dynamic balance time can be greatly decreased; as for field dynamic balance according to which a weight-countering position is provided with a cylinder or a shaft sleeve, it only needs to reserve adjustment holes, and a special wrench can be adopted to conveniently and fast adjust the weight-countering adjustment device of the invention through the adjustment holes, and therefore, field workload can be greatly decreased; and since the adjustment of the positions of the counterweights can be carried out through screw rods, and the positions of the counterweights can be adjusted very precisely, and the precision of dynamic balance is improved. The weight-countering adjustment algorithm of the invention is easy to understand and can facilitate field personnel to carry out adjustment and calculation.

Description

Technical field [0001] The invention relates to a fast adjusting device for counterweight, in particular to a fast adjusting device and method for dynamic balance of rotating machinery. Background technique [0002] When the center of gravity of the rotor of a rotating machine does not coincide with the center of rotation, an unbalanced force will be generated in the rotating state, and the rotor will vibrate under the action of the unbalanced force. At high speeds, even if the mass with a small value is eccentric, it will generate a large centrifugal force and cause a large vibration. Unbalance is a common cause of failure of rotating machinery, accounting for more than 75% of the total number of failures. There are many factors that cause rotor imbalance, such as asymmetric rotor structure, raw material defects, manufacturing and installation errors, and thermal deformation. It can be said that dynamic balance work runs through the entire stages of rotating machinery manufact...

AI Technical Summary

Problems solved by technology

This kind of counterweight method needs to wait until the rotating parts are completely stationary, then uncover the cover or the operator enters into the cover to perform the counterweight operation. The operation process is relatively cumbersome and complicated, and the requirements for the working environment are high, and often need to meet a certain temperature It is required or necessary to detect the gas in the enclosure to meet the requirements of the operators, which is likely to bring safety hazards

The on-site dynamic balance test often needs to go through a trial weighting and start-up test, and then perform multiple counterweight adjustments depending on the dynamic balance effect. The adjustment process needs to be dismantled and assembled repeatedly. As a result, the whole test process has a long cycle, the workload of the on-site operators is heavy, and the on-site safety measures are cumbersome and other disadvantages.

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