VESSEL MIXERS WITH VIBRATION ACTIVATOR IN CONSTRUCTION ENGINEERING

Abstract

Construction mixes are classified as polydisperse heterogeneous systems, where surface phenomena occurring at the phase interface, exert a great influence on formation of such systems. As for mixing processes, adsorption and diffusion are the most important ones. Their speed depends on mobility of mineral constituents' particles, size of the active interfacial area, binder dispersion, technological peculiarities of the process and other factors. It is known that the vibration is one of the ways to increase mixing intensity. The article presents original designs of vessel mixers of forced action with vibration activators placed inside the mixing chamber. A vibration activator is installed in "dead" zones located along the geometrical axis of the mixing chamber where intensity of convective mixing is low. Methods of design of balanced eccentric vibration activators of precessing and plane-parallel type are considered. Results of production tests with regard to industrial designs of vibration mixers are presented. Considerable attention is paid to measurement of the vibration level reflecting the quality of dynamic balancing of the vibration activator. Vibrational impact on the environment and maintenance personnel amounts to ≈ 5 m/s2, corresponding to standard values for processing equipment as per GOST 22061-76.

Keywords

• Vessel mixer
• vibration activator
• design methods
• dynamic balancing