Analysis And Study On The Screening Mechanism Of Oscillation Sieves

The vibration sieves machinery's screening quality and the productivity do not only affect highway's construction quality but also affect highway's construction progress, therefore how studies to improve its screening quality and the productivity, to solute vibration screening machinery existence flash, the mixture, sieves box component's questions and so on damage, has certain practical significance and the value.The vibration screening machinery obtains the screening through in the driver to screening surface thin layer aggregate useful effect. In view of the fact that has in the oscillatory process compared to the vibration to the thin layer actuating medium fuller function effect characteristic, the paper obtains from shaker's excitation way, the change tradition's strength excitation way for the couple excitation (plane, space), proposed the oscillation screening theory, has carried on the analysis and the research to its screening mechanism and the screening efficiency.The paper has first analyzed the screening mechanism which the oscillation sieves, has studied the oscillation screening mechanism and sieves mechanism's difference ordinary, has established dynamics model which the oscillation sieves, and has carried on the theoretical analysis. Obtains in the oscillation screening surface through the theoretical analysis the material theory path, and in the ordinary shaker's screening rationale, established has sieved in view of the oscillation is perfect, system's screening theory.The paper has analyzed the screening efficiency influencing factor, it mainly with the material nature, the vibration characteristic, the screening surface structure as well as the operation management and so on concerns. Gave the oscillation to sieve the highly effective balanced screening the reason, this mainly the excitation way which sieved by the oscillation, the screening surface arrangement form and the screening surface inclination angle decision.To by the exciting force, the plane excitation couple, the spatial excitation couple and so on three ways carries on the comparative trial separately to two kind of screening surface function's screening, the experimental analysis indicated that the oscillation sieves has the higher screening efficiency especially in the seasonings screening aspect compared to the common shaker; The arc screening surface to sieve compared to a plane is more suitable for oscillation.Obtain initially through the theoretical analysis and the experiment: The oscillation not only caused in the screening surface each kind of aggregate movement to be fuller, to pass sieving rate to be high, moreover avoids sieving the body structural element's damage. The oscillation screening has provided an efficient path for the research enhancement screening mechanical gradation quality and the productivity.