Abstract:
The invention relates to a screw compressor for compressing a medium, having a drive unit which has a drive, and having a compressor unit which has two mutually engaging rotors with screw profiles, which are complementary to one another, and a compressor housing having an inlet and an outlet. The rotors are coupled to the drive unit via a shaft in each case. The shafts are only mounted on the drive side of the rotors. The rotors are mounted only on one side relative to their axial direction and are not mounted on the side which faces axially away from the drive. The invention furthermore relates to a screw compressor arrangement with screw compressors which are fluidically connected in series.
Abstract:
A rotary machine is disclosed which is coupled to a motor by a magnetic coupling. An outer magnet drives an inner magnet which is fixed to a rotary shaft which turns a rotor of the machine. The inner magnet is in an enclosure filled with pressurized fluid. The outer magnet is driven by a motor, both the outer magnet and motor being placed in a pressurized cavity outside of the enclosure for the inner magnet. Such arrangement enables the machine, including the motor to be submerged in the sea or chemical liquid while preventing seawater or liquid chemical contamination of the motor and the rotating machine.
Abstract:
A rotary machine is disclosed which is coupled to a motor by a magnetic coupling. An outer magnet drives an inner magnet which is fixed to a rotary shaft which turns a rotor of the machine. The inner magnet is in an enclosure filled with pressurized fluid. The outer magnet is driven by a motor, both the outer magnet and motor being placed in a pressurized cavity outside of the enclosure for the inner magnet. Such arrangement enables the machine, including the motor to be submerged in the sea or chemical liquid while preventing seawater or liquid chemical contamination of the motor and the rotating machine.
Abstract:
The invention relates to a rotary lobe pump (100) for conveying a fluid medium containing solids, comprising an inlet opening (111) and an outlet opening (112) for the medium being conveyed, two rotary lobes (121, 122) arranged in a pump casing (140) and having rotary lobe vanes engaging with other, wherein each of the two rotary lobes is fixed torque-resistantly on a respective shaft (131) and can be driven by said respective shaft, and wherein the two shafts are coupled to each other by a transmission gear arranged in a gearbox casing (152). The invention relates in particular to a rotary lobe pump in which the inlet opening and the outlet opening are arranged on a connection casing (151).
Abstract:
A gas driven motor includes a housing, a gas driven rotating member including a rotor and a rotor shaft carrying the rotor and journalled in a first bearing and a second bearing supported in the housing, and a speed governor for controlling a pressure gas inlet flow in response to the rotation speed of the rotating member. The first bearing includes a set of rolling elements, an outer race arranged in the housing and an inner race arranged on a shaft portion of the rotating member, the set of rolling elements being in contact with the races on which the rolling elements roll. The motor further includes a coupling device arranged to couple the speed governor to the rolling elements of the first bearing, thereby transferring the rotary motion from the rolling elements to the speed governor.
Abstract:
Various rotary pumps are disclosed that are designed to pump viscous fluids or slurries. Often, the seals of such pumps can become over heated. The disclosed pumps include slots disposed in the rotors and/or slots disposed in the openings through which the drive and driven shafts task so that some of the fluid being pumped through the pumping chamber can migrate through the proximal wall of the pump casing to the seal assemblies disposed on the other side of the proximal wall of the pump casing. Thus, the seal assemblies of the pumps are cooled without resorting to the use of a cooling jacket or other cooling mechanism.
Abstract:
An electric pump unit includes: a unit housing; a bearing unit provided within the unit housing; a rotary portion; and a motor stator fixed to the unit housing. The rotary portion includes: a pump driving motor shaft supported by the bearing unit such that an axial position of a center of gravity of the rotary portion falls within an axial range of the bearing unit, and a motor rotor. The motor rotor includes: a disc portion which extends radially outwards from an axial end portion of the motor shaft; and a cylindrical portion which extends from an outer circumferential portion of the disc portion towards the other axial end side and surrounds an outer circumference of the bearing unit.
Abstract:
Lifetime required of mobile-use fuel cells is secured and prolonged, stabilized pump performance is maintained by preventing bearing seizure and abnormal wear. The shaft (101) of a pump mechanism section (100) and the shaft (201) of a motor section (200) are integrated, and the shafts (101, 201) are supported by two or more ball bearings disposed in the pump mechanism section (100), thereby making it possible to fill grease in the closed spaces of the ball bearings (300), and secure a sufficient lifetime basically with almost no possibility of the grease leaking out, even if it is used at a relatively high environmental temperature.
Abstract:
An oil supply groove 12 in communication with a pump room 2A is formed above a bearing 2B of a housing 2, and an open air groove 14 in communication with an atmospheric air is formed at a position rotated around the bearing 2B by 90° from the oil supply groove. In a shank 3B of a rotor 3, a branch passage 11a branching from an oil passage 11 formed in its axial direction to the diametrical direction of the shank and an open air passage 13 formed in the direction perpendicular to the branch passage are formed. The branch passage and the oil supply groove communicate with each other while the open air passage and the open air groove are arranged to also communicate with each other. When the oil passage and the oil supply groove communicate with each other as the rotor stops, atmospheric air flowing in from the open air passage eliminates a negative pressure in the pump room to prevent the lubricating oil from flowing into the pump room in large quantities.
Abstract:
A rotary compressor includes a casing (1), a cylinder block (2), a rotor (3), a sliding plate (4), and a discharge valve (7). A suction port (6) and a discharge port (8) are provided on the casing (1). A rotating center axis of the cylinder block (2) deflects from a rotating center axis of the rotor (3), so that an outer circumference surface of the rotor (3) is inscribed with an inner circumference surface of the cylinder block (2). A head portion of the sliding plate (4) is embedded in a cylindrical body of the cylinder block (2), and a main body of the sliding plate (4) extends into a sliding plate slot of the rotor (3). The discharge valve (7) is provided on the outer circumference of the rotor (3) in front of a rotating direction of the sliding plate (4). A cylinder block inlet (12) is provided on the cylinder block (2) in rear of the rotating direction of the sliding plate (4). The sliding plate (4) and the inscribed point separate a crescent working volume between the inner circumference surface of the cylinder block (2) and the outer circumference surface of the rotor (3) into a suction chamber and a discharge chamber.