Abstract:
A shoe (15) arranged between a swash plate and a piston (10) of a swash plate type compressor for transmitting the rotating motion of the swash plate as a reciprocating movement to the piston (10), and a method for manufacturing the same. The shoe (15) is a single body having a hemispherical portion which slidably contacts a spherical recess formed on the piston, (10) and a planar end face (15b) which slidably contacts the end face of the swash plate. A method for manufacturing such a shoe (15) includes compressing a cylindrical blank in its axial direction and thereby plastically deforming one end of the blank against the inner surface of a hemispherical recess (10b) of a die, and plastically deforming the other end of the blank in a state where only the end face is restrained. According to this method a shoe (15) which incorporates a flank between the hemispherical portion making sliding contact with the recess (10b) of the piston (10) and the bottom end face (15b) making sliding contact with the swash plate can be readily manufactured. Another preferred embodiment of the method includes the steps of forming a hole having a predetermined size on the end face of the cylindrical portion of the blank beforehand and reducing the diameter of the hole opening by pressing and deforming the end face of the cylindrical portion so that the hemispherical portion is thus formed, or includes the steps of cutting the periphery of the end face of the cylindrical portion of the blank into a conical shape beforehand, and then pressing and deforming the conical portion of the blank thereby forming a hemispherical portion. This method can prevent the application of a local high load to the blank, and decrease the amount of material that must flow.
Abstract:
A compressor comprises: a cylinder with a compression space; a suction port and a discharge port which communicate with the compression space in the cylinder; a support member which closes an opening of the cylinder; a rotary shaft which is rotatably supported on the support member; a compression member whose one surface crossing an axial direction of the rotary shaft is inclined continuously between a top dead center and a bottom dead center and which is rotated and compresses a fluid to discharge the fluid via the discharge port; and a vane which is disposed between a suction port and the discharge port, abuts on one surface of the compression member and partitions the compression space in the cylinder into high and low pressure chambers.
Abstract:
An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability. The compressor comprises: a compression element comprising a cylinder in which a compression space is constituted; a suction port and a discharge port which communicate with the compression space in the cylinder; a support member which closes an opening of the cylinder; a rotary shaft which is rotatably supported by a main bearing as a bearing formed on the support member; a compression member whose one surface crossing an axial direction of the rotary shaft is inclined continuously between a top dead center and a bottom dead center and which is disposed in the cylinder to be rotated by the rotary shaft and which compresses a fluid sucked from the suction port to discharge the fluid via the discharge port; a vane which is disposed between the suction port and the discharge port to abut on one surface of the compression member and which partitions the compression space in the cylinder into a low pressure chamber and a high pressure chamber; and a shaft seal which is disposed on an end portion of the bearing (main bearing) on a side opposite to the compression member and which abuts on the rotary shaft.
Abstract:
A bearing assembly comprising, an inner race, an outer race spaced apart from the inner race and a plurality of rolling elements disposed in the space between the inner race and the outer race. The rolling elements are in rolling contact with the inner and outer races. An abrasion resistant coating is deposited on at least one of the inner race and the outer race. The coating is selected from the group consisting of metallic nitrides, metallic carbonitrides, and mixtures thereof.
Abstract:
A sliding member of an iron-based non-porous material, such as vane, of a rotary compressor has a sliding surface processed by a surface treatment in which the surface is subjected to oxidizing and nitriding to form an oxidized and nitrided layer thereon. The surface is then subjected to a steam-treatment in which water is caused to react with components of the oxidized and nitrided layer to form a layer of oxidized iron of a porous network structure disposed outwardly of the oxidized and nitrided layer. The oxidized iron layer is composed mainly of tri-iron tetroxide and softer than the oxidized and nitrided layer.
Abstract:
A compressor having a compression element with a cylinder in which a compression space is constituted, a suction port and a discharge port which communicate with the compression space in the cylinder, a support member which closes an opening on the cylinder and a rotary shaft which is rotatably supported by a main bearing as a bearing formed on the support member. A compression member, whose one surface crosses an axial direction of the rotary shaft is inclined continuously between a top dead center and a bottom dead center and is disposed in the cylinder to be rotated by the rotary shaft, compresses a fluid sucked from the suction port to discharge the fluid via the discharge port. A vane which is disposed between the suction port and the discharge port to abut on one surface of the compression member partitions the compression space in the cylinder into a low pressure chamber and high pressure chamber. A shaft seal which is disposed on an end portion of the main bearing, on a side opposite to the compression member, abuts on the rotary shaft.
Abstract:
An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability. The compressor comprises: a compression element comprising a cylinder in which a compression space is constituted; a suction port and a discharge port which communicate with the compression space in the cylinder; a support member which closes an opening of the cylinder; a rotary shaft which is rotatably supported by a main bearing as a bearing formed on the support member; a compression member whose one surface crossing an axial direction of the rotary shaft is inclined continuously between a top dead center and a bottom dead center and which is disposed in the cylinder to be rotated by the rotary shaft and which compresses a fluid sucked from the suction port to discharge the fluid via the discharge port; a vane which is disposed between the suction port and the discharge port to abut on one surface of the compression member and which partitions the compression space in the cylinder into a low pressure chamber and a high pressure chamber; and a shaft seal which is disposed on an end portion of the bearing (main bearing) on a side opposite to the compression member and which abuts on the rotary shaft.
Abstract:
A system for hydrostatic pressure release of the rocker in the bearing box in an axial piston machine. The pressure-relief system includes slots in the rocker bearing box connected with axial passages through the pistons, pressure pockets in the guide shoes and passageways through the rocker. In order to render the forces in the pressure-relief system essentially constant and speed-independent, the pressure-relief devices of the rocker bearing and four individual slots, two of which are parallel to each other in the region of each of the two bearing surfaces on the rocker and which are connected to the pressure pockets in the guide shoes by the passageways through the rocker.