WORKING WHEEL OF BLOWER Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: blades of the blower is made of a shape memory material and secured to a disk for permitting changing their position from parallel to perpendicular to the plane of the disk when the temperature of the fluid to be pumped varies within a required range. To increase the rigidity and strength each blade can be composed of two plates which can be connected and disconnected. The plates form a hollow structure at a given temperature of the fluid to be pumped. This allows the flow rate of the fluid to be pumped to be expanded from a maximum to the flow rate when it is fully excluded. EFFECT: decreased material consumption and improved design. 2 cl, 5 dwg