| 摘要 |
PURPOSE:To reduce the weight of an eccentric shaft by setting the eccentricity direction of a cylinder to 120-150 deg. in crank angle, and by setting the amount of eccentricity through the necessary amount of radial clearance and the maximum deflection in the eccentric shaft's division situated in the cylinder. CONSTITUTION:A rolling piston 4 to make eccentric revolutions is arranged at a cylinder 2 which forms a compression chamber 3 installed in an eccentricity of 20mum from the rotational center of the eccentric shaft 1 driven by a motor, orientated at 120-150 deg. with respect to the vane position. This eccentric shaft 1 receives a load due to the vane back pressure and the load through the rolling piston 4 because of pressure difference between high pressure chamber and low pressure chamber, where the radial clearance 10 per turn will be 20mum max. and 0mum min, as the cylinder 2 is in an eccentricity of 20mum in the direction of 120-150 deg., which is much favorable in respect of gas leakage. |
