MIXER WITH ACTIVE PNEUMODYNAMIC PROTECTIVE DEVICE FOR SUPPORT UNIT Russian patent published in 2005 - IPC

FIELD: building equipment, particularly to prepare building mixers used to produce wall units, floor panels and for cast-in-place building.

SUBSTANCE: mixer comprises body with flanged bottom and drive shaft installed in bearing support having packing glands and arranged in independent case. The case is secured to flanged bottom of the body. Mixer also has blades and compressed air supply system. Bearing support case is arranged inside the body and is provided with protective shell made as an inverted cup. The cup includes cylinder with bottom flange fixedly secured in upper part thereof and adapted to secure above shell to end part of drive shaft above said bearing support so that lower edge of the cylinder wall and flanged bottom of the body define a gap. Blades are connected to above cylinder. The mixer is provided with additional compressed air supply system to deliver compressed air to upper part of above shell cavity directly under bottom flange thereof. End part of drive shaft projecting out of the shell is covered with air-tight lid.

EFFECT: increased time of undisturbed mixer operation, improved reliability, extended range of capabilities due to prevention of contact between packing gland assembly and aggressive working mixture, extended range of compressed air influence on the mixture, reduced material consumption of the structure and enhanced operational conditions of the mixture as a whole and of separate components thereof.

1 dwg