DEVICE AND METHOD OF BALANCE OF SPECIFIC LOADS IN TWO-STEP BELT-SHOE BRAKE Russian patent published in 2011 - IPC F16D49/08 

FIELD: machine building.

SUBSTANCE: device consists of brake pulley with ribs, of brake shoes with external and internal friction linings located on brake pulley, of brake belt and of mechanical drive. Cross slots of various lengthwise section are made along whole perimetre of working surface of the brake pulley. Friction elements are pressed into the slots. Ribs of L-shape are secured to the brake pulley on ends through magnet insulated padding. The ribs have tapered flanges forming a cavity along perimetre of the pulley in form of a dovetail. Brake shoes with bases transformed into arc-shape plates are installed into the cavity. Internal and external friction linings are arranged on surfaces of the plates. The method consists in the following: before operation of the brake there is determined ratio of coefficients of mutual overlap equal to ratio of specific loads on entering and leaving branches of the brake belt; while the second ratio of coefficients is equal to ratio of specific loads realised on entering and leaving surfaces of the brake pulley, resulted in transfer of the brake shoes under branches of the brake belt in process of operation of friction pairs. Transfer of brake shoes causes re-distribution of specific loads in friction pairs.

EFFECT: static balance of specific loads in friction pairs of two-step belt-shoe brake by rational arrangement of brake shoes on surface of brake pulley and at second stage - dynamic balance due to limited transfer of shoes along entering and leaving surfaces of brake pulley.

2 cl, 4 dwg