| 摘要 |
PURPOSE:To reduce the generation of noise of a compressor and to prevent lowering of compression efficiency due to strain of a bearing, by a method wherein a delivery cover, with which a groove is covered, is attached to a bearing in which a groove extending throughout a whole periphery is formed in a surface opposite to a cylinder in a range of from a surface, adhered to the flat surface of a cylinder, to a position forming an outer periphery. CONSTITUTION:A recessed part 13 for mounting a valve and a groove 14, situated throughout a whole periphery in a range of from a surface 12c adhered to the flat part of a cylinder 7 to a position, forming an outer periphery, are formed in a surface 12b opposite to a cylinder of a bearing 12, the whole periphery of which is securely welded to the inner peripheral surface of a closed case 2. A cup-shaped discharge cover 15 is situated on the surface 12b, opposite to a cylinder, of the bearing 12 in a manner to cover the groove 14 therewith. This constitution increases the volume of a discharge chamber 15b in the discharge cover 15 thanks to the presence of the groove 14, reduces the generation of noise due to pressure pulsation, absorbs strain and deformation occurring when the bearing 12 is securely welded to the closed case 2, and prevents lowering of compression efficiency due to leak of gas.
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