METHOD TO DETECT DIRECTIONS OF ELECTRIC CURRENT COMPONENTS IN FRICTION PAIRS "POLYMER-METAL" OF DRUM-BLOCK BRAKE DURING THEIR HEATING IN BENCH CONDITIONS Russian patent published in 2012 - IPC F16D65/82 F16D51/10 

FIELD: machine building.

SUBSTANCE: method to detect directions of electric current components in a tribotechnical system "polymer-metal" of a drum-block brake during its heating in bench conditions consists in setting a common law of microcurrent formation on macroareas of friction surfaces due to formation of "stiff" and "soft" oxide films on them. Then under the condition that electronic work function from a friction pad W_n is higher than electronic work function from a rim of a brake drum W_M, with preferable direction of its rotation, the total current of electrisation I_"ф" generated in circuits by triboelectromotive forces is detected with account of directions of its summands. The method to detect directions of electric current components in a tribotechnical system "polymer-metal" of a drum-block brake with account of preferable direction of brake drum rotation during its heating in bench conditions above the permissible temperature for materials of a friction pad consists in setting a common law of microcurrent formation on macroareas of friction surfaces due to formation of "stiff" and "soft" oxide films on them. Then the total current of electrisation I_"ф" generated in circuits due to triboelectromotive forces is detected with account of directions of its summands.

EFFECT: method achieves detection of directions of total current components generated with microthermoelectric generators and microthermoelectric refrigerators on macroareas of direct and reverse friction pairs "polymer - metal" of a drum-block brake during their heating in bench conditions.

2 cl, 19 dwg