FIELD: power engineering. SUBSTANCE: bimetallic elements 1 is made in form of helical spring manufactured of bimetallic sheet, strip or bar whose active layer 2 and passive layer 3 are located in opposite directions relative to each other; connected with ends of this spring by means of hinges 5 of bimetallic element are ends of levers 6 which are connected by means of hinges 7, thus forming pair of levers. Both hinges of bimetallic element lie on the axial line of spring figure; all hinges of drive are made in form of axles which provide for turn of parts being connected relative to each other. In particular versions of drive, use is made of two pairs of levers 6 of second order which are located symmetrically relative to axial line of spring figure of bimetallic element or levers of first order connected in pairs by means of hinges 7 in their center portion; in case of thermal deformation or reduction of their length levers turn on hinges setting in motion end hinges 7 of levers by larger distance as compared with motion of ends of bimetallic element 1. Amplitude of motion of end hinges 7 of levers depends also on number of pairs of levers; load-carrying capacity is increased at this due to use of several bimetallic elements arranged in order mentioned above. EFFECT: enhanced efficiency. 5 cl, 4 dwg
