SHIM FOR TURBINE BLADE, TURBINE ROTOR STRUCTURE AND TURBINE Russian patent published in 2013 - IPC F01D5/30 

FIELD: machine building.

SUBSTANCE: turbine blade shim has two side plates located opposite support surfaces of blade leg and base that interconnects side plates. The shim at the level of side plates has multi-layer structure that consists of three layers clamped together and arranged one on the other. The first layer is made of first material, the second layer is made of second material and third layer - third material that can be identical or differ from first material. Note that first, second and third material has first, second and third Young's modulus correspondingly that have values connected by ratio protected by present invention. The other invention of the group pertains to turbine rotor structure that has disk with recesses at external periphery, blades the legs of which are mounted into recesses and the above shim. Each side plate of each shim is located between bearing surface of blade leg and bearing surface of disk. One more invention refers to turbine that contains the above rotor structure.

EFFECT: invention allows increasing durability of blade bearing surfaces and disk due to their wear reduction.

9 cl, 4 dwg