TWO-STAGE BAND-AND-SHOE BRAKE WITH THERMAL ELECTRIC COOLING Russian patent published in 2009 - IPC F16D49/08 F16D65/813 

FIELD: engineering industry.

SUBSTANCE: invention refers to engineering industry, and can be used in band-and-shoe brakes of drill winches. Two-stage band-and-shoe brake consists of brake pulley whereon there located are generators and stabilisation device; brake band and elastic brake band-ring that is attached to the pulley edges on both sides; main and auxiliary friction pads, and cooling points and a drive. Band-ring is made from rubber reinforced with ropes. Pulley edges have ventilation holes at the bottom. There is "П"-shaped cavity along the perimeter of brake pulley; main and auxiliary friction pads are located in that cavity. Main and auxiliary friction pads are attached to inner and outer surface of brake band-ring. Cooling points are made in the form of thermobatteries consisting of plate-like thermocouples and cylindrical pins that comprise thermal elements with electronic conductivity and hole-type conductivity, which are installed in the body of auxiliary and main pads comprising the first and the second circuits. Non-working surfaces of thermal elements of batteries are connected to each other by means of heat-conductive plates-connecting straps.

EFFECT: improving cooling efficiency of friction points of two-stage band-and-shoe brake, and improving wear-and-friction properties of their friction pairs.

3 cl, 11 dwg