Method for monitoring unbalanced force of sliding bearings of supergravity centrifugal machine

Abstract

The invention discloses a method for monitoring unbalanced force of sliding bearings of a supergravity centrifugal machine. The method is characterized in that the sliding bearings are arranged on the upper portion, the middle portion and the lower portion of a spindle of the supergravity centrifugal machine correspondingly, bearing bushes are arranged on the sliding bearings, force sensors are arranged at the bearing bushes, a centrifugal machine test is carried out to acquire data of the force sensors in real time, and a load time-travel curve is obtained; and two coordinate systems are established to synthesize total support reaction force of each sliding bearing, processing is carried out to obtain the dynamic unbalance force of the supergravity centrifugal machine, the dynamic unbalance force of the whole supergravity centrifugal machine and the working performance of the sliding bearings are checked, and the monitoring of the unbalance force of the sliding bearings of the supergravity centrifugal machine is realized. According to the method for monitoring the unbalanced force of the sliding bearings of the supergravity centrifugal machine, high-precision operation and the accuracy of the final unbalanced load can still be guaranteed under the condition that some sensors fail, other factors for generating the dynamic unbalance amount can also be reflected, stable operation and control are better guaranteed, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of centrifuge rotor balance, and relates to a supergravity centrifuge monitoring technology, in particular to a supergravity centrifuge sliding bearing unbalanced force monitoring method. Background technique [0002] As a high-speed rotating equipment, the ultra-gravity centrifuge must bear the additional dynamic load including the unbalanced rotation in addition to the static load. The dynamic load will cause forced vibration of the equipment, which will reduce the smoothness and precision of operation, increase the motion noise, accelerate the wear of moving parts, and shorten the service life; the severe one will make the rotor unable to operate normally and fail to meet the design indicators. Therefore, sensitive and reliable real-time monitoring and feedback of the unbalanced amount of the centrifuge during operation is an important condition to ensure the stable operation of the ultragravity centrifug...

AI Technical Summary

Problems solved by technology

[0010] It is required to install a monitoring device between the boom and the support of the boom. The newly added mechanism not only increases the complexity of the main structure, but also complicates the processing, troublesome installation and adjustment, and limited measurement accuracy also limits the development of its own technology.

In addition, the trimming technology mainly uses the monitoring results of the unbalance monitoring device to provide real-time feedback control of the moving mechanism to perform the trimming operation. If the additional mechanism is not adjusted and coordinated, the additional friction to the centrifuge will affect the transmission of the unbalanced force and cause monitoring. data deviation

[0011] In addition, the existing monitoring technologies all use the measurement results of the force sensor between the rotating arm and the main shaft to represent the unbalanced amount, which represents the unbalanced centrifugal force at the working end and the counterweight end. However, due to the need to overcome the The effect of friction between them will lead to unsafe monitoring results

Moreover, the amount of unbalance to be borne by the centrifuge caused by other reasons (such as the leftover angle of swing, installation deviation, etc.) cannot be monitored by existing technologies

[0012] Finally, the dynamic unbalanced load obtained through indirect conversion cannot reflect the effect of the unbalanced force at the end of the arm on the bearing, and the bearing is the key support component involved in the safe and effective operation of the supergravity centrifuge and the main component of the mechanical system. Therefore, based on The direct unbalanced force monitoring method of the bearing can ensure the real-time dynamic load and the stability of the machine operation, which has not been solved by the existing indirect monitoring methods

Images