Abstract: The present invention makes a lap clearance between a fixed scroll and an turning scroll as small as possible to suppress leakage of compressed fluid from a compression chamber in a compression operation, thereby improving a compression efficiency. Provided is a scroll-type fluid machine characterized by comprising: a fixed scroll having a scroll lap portion; and an orbiting scroll that is provided to face the fixed scroll and that has a scroll lap portion turning so as to form a plurality of compression chambers in a clearance relative to the lap portion of the fixed scroll, wherein the lap portion of at least one of the fixed scroll and the turning scroll is provided with, in a predetermined region, a recessed portion on one lateral surface thereof and a protruding portion on the other lateral surface thereof.

Abstract: A scroll-type fluid machine and maintenance method for same are provided in order to improve reliability and workability by supplying sufficient grease to necessary parts of an orbiting bearing or auxiliary crank bearing without entailing a complicated operation during maintenance. The scroll-type fluid machine includes a fixed scroll, an orbiting scroll, a casing provided on the outer side of the orbiting scroll in the radial direction, a drive shaft, an orbiting bearing supporting the drive shaft with respect to the orbiting scroll, and a piping supplying a lubricant to the orbiting bearing. The orbiting scroll is provided with a boss plate that is attached to the drive shaft, the piping is provided in the boss plate, and the tip of the piping faces toward an opening provided between the casing and the fixed scroll or toward an opening provided in the fixed scroll or the casing.

Abstract: A compressor has a compressor body and a motor integrated with one another, with the structure in which the sub-assembly of the motor portion and the compressor body assembled by positioning centers of the motor and compressor casings with positioning pins. When the deformation of a flange surface of the motor casing is large on a side of the compressor casing, positioning pin holes may have positional dimensions where the positioning is difficult, and the rigidity of the motor casing is increased to avoid change to the dimensional positions of the pin holes of the motor casing after the sub-assembly process. Fastening seats to fasten a motor stator by use of fastening members and ribs to reinforce the fastening seats are thus provided inside the motor casing to increase rigidity of the motor casing and inhibit deformation of the positional dimensions of the positional pin holes.

Abstract: The objective of the present invention is to provide a scroll-type fluid machine for which the service life can be improved by reducing the load applied to a rotation prevention mechanism.

Abstract: The objective of the present invention is to provide a scroll-type fluid machine and maintenance method for same with which reliability and workability are improved by making it possible to supply sufficient grease to necessary parts of an orbiting bearing or auxiliary crank bearing without entailing a complicated operation during maintenance.

Abstract: The present invention makes a lap clearance between a fixed scroll and an turning scroll as small as possible to suppress leakage of compressed fluid from a compression chamber in a compression operation, thereby improving a compression efficiency. Provided is a scroll-type fluid machine characterized by comprising: a fixed scroll having a scroll lap portion; and an orbiting scroll that is provided to face the fixed scroll and that has a scroll lap portion turning so as to form a plurality of compression chambers in a clearance relative to the lap portion of the fixed scroll, wherein the lap portion of at least one of the fixed scroll and the turning scroll is provided with, in a predetermined region, a recessed portion on one lateral surface thereof and a protruding portion on the other lateral surface thereof.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: The objective of the present invention is to provide a scroll-type fluid machine for which the service life can be improved by reducing the load applied to a rotation prevention mechanism.

Abstract: A scroll fluid machine is provided that includes: a fixed scroll; an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting with a plurality of compression chambers formed between the orbiting scroll and the fixed scroll; a drive shaft driving the orbiting scroll; and a backside plate provided between the drive shaft and the orbiting scroll, an alignment hole being provided in each of the orbiting scroll and the backside plate, and an alignment pin for alignment and a seal member for sealing the compression chambers being provided in the alignment holes.

Abstract: A scroll fluid machine having: a compressor body including a fixed scroll and an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting; a drive shaft connected to the orbiting scroll; a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body, when the cooling wind passage being disposed left and the drive shaft being disposed right when seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions being smaller in upstream than downstream of the cooling wind passage.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: In a compressor having a compressor body and a motor integrated with one another and having the structure in which the sub-assembly of the motor portion and the compressor body are assembled by positioning the centers of the motor casing and compressor casing with positioning pins, when the deformation of the flange surface of the motor casing is large on the side of the compressor casing, the positioning pin holes may have positional dimensions where the positioning is difficult. Therefore, the rigidity of the motor casing may need to be increased not to change the dimensional positions of the pin holes of the motor casing after the sub-assembly process. Inside the motor casing, fastening seats to fasten a motor stator by use of fastening members and ribs to reinforce the fastening seats are provided. As a result, the rigidity of the motor casing is increased, and the deformation of the positional dimensions of the positional pin holes can be inhibited.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: An electromagnetic valve, which is provided between an intake port of a compressor body and a pneumatic line at an intermediate position of an intake pipe, is opened/closed by a control unit. Communication between the intake port of the compressor body and the pneumatic line is permitted when the valve is open, and is blocked when the valve is closed. In a start-up control of the compressor body, the electromagnetic valve is opened, permitting communication of the pneumatic line in the plant with the intake port of the compressor body for power supply to an electric motor to drive an orbiting scroll. Rattling of the orbiting scroll by an amount equal to the axial gap (play) is suppressed before starting a compression operation.

Abstract: A scroll fluid machine having: a compressor body including a fixed scroll and an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting; a drive shaft connected to the orbiting scroll; a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body, when the cooling wind passage being disposed left and the drive shaft being disposed right when seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions being smaller in upstream than downstream of the cooling wind passage.

Abstract: A scroll fluid machine is provided that includes: a fixed scroll; an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting with a plurality of compression chambers formed between the orbiting scroll and the fixed scroll; a drive shaft driving the orbiting scroll; and a backside plate provided between the drive shaft and the orbiting scroll, an alignment hole being provided in each of the orbiting scroll and the backside plate, and an alignment pin for alignment and a seal member for sealing the compression chambers being provided in the alignment holes.

Abstract: A scroll fluid machine with ensured reliability of an oil seal and a bearing even in a compressor operation at high rpm and high load is provided, which includes: a fixed scroll; an orbiting scroll facing the fixed scroll and having a boss provided on a face opposite to the fixed scroll; a drive shaft having a leading end mounted to the boss; an orbiting bearing supporting the drive shaft in connection with the orbiting scroll; and a seal member placed between the boss and the drive shaft to seal against a lubricant supplied to the orbiting bearing. The seal member has an oil lip producing action of moving the lubricant toward the orbiting bearing by rotation of the drive shaft. A communication passage is provided in the oil lip for communication between a space between the orbiting bearing and the seal member and a space outside the boss.

Abstract: A reciprocating compressor includes a piston which compresses air by, while rocking, reciprocatingly moving in a cylinder and a sealing member which is fitted in a groove formed on the piston for sealing between the cylinder and the piston. In the reciprocating compressor: the sealing member has a bottom portion to be fitted in the groove formed on the piston and a side portion provided radially outwardly of the piston; and the side portion includes a bent portion so as to reduce a gap between an upper end portion thereof and the piston.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: The invention reduces a centrifugal force of an orbiting scroll which acts on an auxiliary crank mechanism. A crank pin which is eccentric from a main shaft portion is formed in a drive shaft and attached to an orbiting bearing which is provided in a back face side of an orbiting scroll. The main shaft portion of the drive shaft is rotatably supported by a main bearing. An internal gap of the main bearing is set to a value which is larger than a value obtained by subtracting the double value of an eccentric amount difference between an eccentric amount of an auxiliary crank shaft and an eccentric amount of the drive shaft from an internal gap of the orbiting bearing.