Abstract:
A compressor (12) with a capacity modulation system (10) includes a compression chamber (30), a rotatable shaft (20) within the compression chamber (30), and a roller (32) mounted on the shaft (20) in contact with a wall of the compression chamber (30). A re-expansion channel (46) adjacent to the compression chamber (30) has a first end forming a re-expansion port (48) in the wall of the compression chamber (30). A re-expansion chamber (50) is connected to the re-expansion channel (46). A valve (52) disposed in the re-expansion channel (46) is movable between a first position, in which the valve (52) allows fluid communication between the compression chamber (30) and the re-expansion chamber (50), and a second position, in which the valve (52) prevents fluid communication between the compression chamber (30) and the re-expansion chamber (50). The compressor (12) operates in a reduced capacity mode with the valve (52) in the first position, and in a full capacity mode with the valve (52) in the second position.
Abstract:
A shaft load balancing system (10) includes a housing (22) divided into a first chamber (26) at a first operating pressure and a second chamber (28) at a second, lower operating pressure. A shaft (38) passes from the first chamber (26) into the second chamber (28). The shaft (38) includes a first end (46) in the first chamber, a second end (48) in the second chamber, and a substantially axial channel (50) connecting the first end and the second end. The first end (46) is in fluid communication with a fluid reservoir (30) in the housing (22). A reaction member (52) engages the second end (48). The reaction member 52) includes a compression volume (54) in fluid communication with the channel (50). A pressure differential between the chambers (26, 28) forces fluid from the fluid reservoir (30) through the channel (50) and into the compression volume (54). The reaction member (52) transmits the fluid force to the housing (22), allowing the fluid to create a force on the second end (48) of the shaft (38).
Abstract:
A compressor system (10) includes a housing (12) with a low pressure first chamber (14) and a high pressure second chamber (16). A motor (24) in the first chamber (14) has a shaft (30) that passes into the second chamber (16). A compressor (18) in the housing (12) is operably connected to the motor (24) by the shaft (30). The second chamber (16) contains an oil sump (48) storing lubricating oil for the compressor (18). By the action of the compressor (18), the fluid in the first chamber (14) is maintained at compressor suction pressure and the fluid in the second chamber (16) is maintained at compressor discharge pressure. Lubricating oil is separated from the compressed fluid with a baffle (58) in the high pressure chamber (16). Further oil separation can be carried out using a weighted disk (62) secured on the shaft (30) in the high pressure chamber (16).
Abstract:
A compressor system includes a housing with a low pressure first chamber and a high pressure second chamber. A motor in the first chamber has a shaft that passes into the second chamber. A compressor in the housing is operably connected to the motor by the shaft. The second chamber contains an oil sump storing lubricating oil for the compressor. A fluid path through the compressor system includes a first orifice in the housing communicating a suction tube with the first chamber, a first fluid passage communicating the first chamber with the compressor suction port, a second fluid passage communicating the compressor discharge port with the second chamber, and a second orifice in the housing communicating the second chamber with a discharge tube. By the action of the compressor, the fluid in the first chamber is maintained at compressor suction pressure and the fluid in the second chamber is maintained at compressor discharge pressure. Placement of the motor in the low pressure chamber allows operation of the compressor system in environments with high ambient temperatures without adverse effects on the motor performance. Lubricating oil is separated from the compressed fluid with a baffle in the high pressure chamber. Further oil separation can be carried out using a weighted disk secured on the shaft in the high pressure chamber. Fluid discharged from the compressor can be directed onto the rotating weighted disk, which propels oil in the fluid onto the inner wall of the housing. The separated oil drains into the oil sump.
Abstract:
A shaft load balancing system includes a housing divided into a first chamber at a first operating pressure and a second chamber at a second, lower operating pressure. A shaft passes from the first chamber into the second chamber. The shaft includes a first end in the first chamber, a second end in the second chamber, and a substantially axial channel connecting the first end and the second end. The first end is in fluid communication with a fluid reservoir in the housing. A reaction member engages the second end. The reaction member includes a compression volume in fluid communication with the channel. A pressure differential between the chambers forces fluid from the fluid reservoir through the channel and into the compression volume. The reaction member transmits the fluid force to the housing, allowing the fluid to create a force on the second end of the shaft.
Abstract:
A compressor system includes a housing with a low pressure first chamber and a high pressure second chamber. A motor in the first chamber has a shaft that passes into the second chamber. A compressor in the housing is operably connected to the motor by the shaft. The second chamber contains an oil sump storing lubricating oil for the compressor. A fluid path through the compressor system includes a first orifice in the housing communicating a suction tube with the first chamber, a first fluid passage communicating the first chamber with the compressor suction port, a second fluid passage communicating the compressor discharge port with the second chamber, and a second orifice in the housing communicating the second chamber with a discharge tube. By the action of the compressor, the fluid in the first chamber is maintained at compressor suction pressure and the fluid in the second chamber is maintained at compressor discharge pressure. Placement of the motor in the low pressure chamber allows operation of the compressor system in environments with high ambient temperatures without adverse effects on the motor performance. Lubricating oil is separated from the compressed fluid with a baffle in the high pressure chamber. Further oil separation can be carried out using a weighted disk secured on the shaft in the high pressure chamber. Fluid discharged from the compressor can be directed onto the rotating weighted disk, which propels oil in the fluid onto the inner wall of the housing. The separated oil drains into the oil sump.
Abstract:
A compressor with a capacity modulation system includes a compression chamber, a rotatable shaft within the compression chamber, and a roller mounted on the shaft in contact with a wall of the compression chamber. A suction channel is in fluid communication with the compression chamber for providing fluid at a suction pressure and a discharge channel is in fluid communication with the compression chamber for removing fluid at a discharge pressure. A re-expansion channel adjacent to the compression chamber has a first end forming a re-expansion port in the wall of the compression chamber. A re-expansion chamber is connected to the re-expansion channel. A valve disposed in the re-expansion channel is movable between a first position, in which the valve allows fluid communication between the compression chamber and the re-expansion chamber, and a second position, in which the valve prevents fluid communication between the compression chamber and re-expansion chamber.