The Studies On Dynamics Of Self-synchronization Elliptical Motion Shale Shaker

Shaker is a sort of sieving machine which is widely applied to petroleum, coal, metallurgy, chemical industry, grain, etc. Most of their vibrations are periodical and forced by the centrifugal inertia force produced by the rotating excitation shaft with the eccentric block. Shaker is classified as single shaft shaker, twin-shaft shaker and multi-shaft shaker by the amount of the shaft.According to the form of motion, twin-shaft shaker is classified as twin-shaft general elliptical motion shaker, twin-shaft circular motion shaker, twin-shaft linear motion shaker, twin-shaft balanced elliptical motion shaker and twin-shaft especial motion shaker; according to synchronous mode, shaker is classified as forced synchronized twin-shaft shaker and self- synchronized twin-shaft shaker; according to operating frequency of the exciting shaft, twin-shaft shaker is classified as single frequency shaker and multi-frequency shaker.Through the actuality analysis of self-synchronized elliptical shaker, the subject of dynamics about some new self-synchronized elliptical shakers is established in this dissertation.With the help of the project about GW-S1 shaker by CNPC, this dissertation has finished the following research work and has complemented the system of dynamicstheory of self-synchronized elliptical shaker.(1) On the basic theory of analytic mechanics, the comparatively intact dynamics model is set up for the first time, about the self- synchronized, equal product of quality and diameter, and twin-shaft shaker. The qualification of balanced elliptical motion is given, the self-synchronous condition and stability conditions are build up, the calculation method for phase difference is given when the two vibration motor are running steadily.(2) The dissertation studies the dynamics for the offset, equal product of quality and diameter, self-synchronized elliptical shaker ,and the dynamics mode about the shaker is set up, and the condition of realizing the balanced elliptical motion is provided.(3) Through the research on the unequal product of quality and diameter, twin-shaft, self-synchronized elliptical shaker, a set of synchronized theory about the shaker is set up, and the problem which people do not pay attention to in the beginning is corrected. On the basic of the theory, a kind of self-synchronized balanced elliptical shaker - GW-S1 type has been designed, and has been put into practice in petroleum well drilling widely.(4)0n the basis of self-follow phenomena of twin-shaft and self-synchronized shaker in the course of operating, a twin-shaft and self-synchronized energy conservation shaker is advanced. Through analyzing its operating principle, the twin-motor economical controller is designed, and the experiment on the testing shaker in the room is tried on, the result of the test shows that the energy-conserving rate of the controller can be up to 39.7%, and the energy-conserving result is very obvious.(5)The dissertation studies a kind of elliptic shaker whose motion is composed of rectilinear and circularity, and excited by three motors. The dynamics model of the shaker is advanced, and the qualification of realizing balanced elliptical motion is deduced. This paper also discusses the influence upon the motion of the shaker by the phase difference between the rectilinear motion and circular motion, and the calculation method of operational phase difference is set up.(6)Using the modern finite element software ANSYS to analyze the dynamic and static of the GW-S1 shaker, so guarantying the strength of the key part of shaker's boxes ,etc. At the same time, carrying the modal analysis on the part of participating in vibration, and get the 14 order natural frequency, On this basis, carrying through the analysis of dynamic response of this part, and getting the dynamic response of the characteristic point in the part, such as displacement, velocity and acceleration, etc.