PURPOSE: To minimize the deformation of the inside diameter of cylinder by making a discharge silencer communication hole only on upside from the center line in the horizontal direction of the cylinder and also making larger the thickness of casting between the discharge silencer communication hole and the cylinder.
CONSTITUTION: The discharge silencer communication hole 16 is made only on upside from the center line x-x in the horizontal direction of the cylinder 7, by which, even if a high internal pressure resulting from a high-pressure gas is applied to the discharge silencer chamber 19 and the discharge silencer communication hole 16, the thickness of a casting between the discharge silencer communication hole 16 and the cylinder 7 can be made larger because of the presence of the discharge silencer communication hole 16 on the upside from the center line x-x in the horizontal direction of the cylinder 7. In addition, because the center of force pressing the cylinder 7 acts only on the upside portion of the cylinder 7, the variation in the inside diameter of the cylinder 7 due to a high-pressure gas produced when a compressor is operated at a high pressure can be lessened to a great extent.
COPYRIGHT: (C)1980,JPO&Japio