Abstract:
A rotary compressor (1) including a cylindrical compressor housing (10) provided with an inlet unit (134S) of a refrigerant and a discharging unit (107) of the refrigerant, a compressing unit (12) which is disposed inside the compressor housing and includes a cylinder (121S) and a piston (125S) for compressing the refrigerant sucked in from the inlet portion, a rotation shaft (15) provided with the piston of the compressing unit, and a motor (11) which includes a cylindrical stator and a rotor that is provided on another end side of the rotation shaft and that rotates inside the stator, and which drives the compressing unit via the rotation shaft, in which an outer circumferential portion of the stator includes a concave portion (164) and is fixed to an inner circumferential portion of the compressor housing in a transition fit state, and in which the compressor housing includes a weld portion which is joined to the concave portion of the stator.
Abstract:
In the two-cylinder hermetic compressor, a main bearing is disposed on one surface of a first cylinder, an intermediate plate is disposed on another surface of the first cylinder, the intermediate plate is disposed on one surface of a second cylinder, and an auxiliary bearing is disposed on another surface of the second cylinder. A shaft is constituted by a main shaft portion which has a rotor attached thereto and is supported by the main bearing, a first eccentric portion having a first piston attached thereto, a second eccentric portion having a second piston attached thereto, and an auxiliary shaft portion supported by the auxiliary bearing. A thrust receiving portion is provided on a side of the second eccentric portion facing the auxiliary shaft portion, and the auxiliary bearing is provided with a thrust surface on which the end face of the thrust receiving portion slides while contacting therewith. The thrust surface is provided with a ring groove.
Abstract:
A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyol ester oil as a compressor lubricating oil. In addition, a fixed scroll (12) and a revolving scroll (13) each having a spiral lap rising from an end plate, and a compression chamber (15) which is formed by meshing the fixed scroll (12) and the revolving scroll (13), are provided. In addition, a discharge hole (18) which is provided at a center position of the end plate of the fixed scroll (12), and is open to a discharge chamber (31), a bypass hole (68) which is provided in the end plate of the fixed scroll (12), and communicates with the compression chamber (15) and the discharge chamber (31) at a timing different from a timing at which the compression chamber (15) communicates with the discharge hole (18), and a check valve which is provided in the bypass hole (68), and allows a flow from the compression chamber (15) side to the discharge chamber (31) side.
Abstract:
The purpose of the present invention is to provide a scroll fluid machine, the reliability of which is ensured and which can be manufactured with high productivity. The present invention provides a scroll fluid machine comprising: a stationary scroll having a spiral wrap upstanding therefrom; an orbiting scroll provided facing the stationary scroll and orbiting; a casing provided outside the orbiting scroll; a drive shaft for causing the orbiting scroll to orbit; an orbiting bearing for transmitting the rotational movement of the drive shaft to the orbiting scroll; and a plurality of rotation prevention mechanisms for preventing the orbiting scroll from rotating. The scroll fluid machine is characterized in that: the rotation prevention mechanisms have crankshafts and also have crank bearings for supporting the crankshafts; and the gap between each of the crankshafts and the corresponding one of the crank bearings is set to be greater than the gap between the drive shaft and the orbiting bearing.
Abstract:
The invention relates to an eccentric screw pump, comprising at least one stator (1) composed of an elastic material and a rotor (2) that can be rotated in the stator (1), the stator (1) being surrounded by a stator casing (3) at least in some regions. The stator casing (3) consists of at least two casing segments (19) as a longitudinally divided casing and forms a stator clamping device, by means of which the stator (2) can be clamped against the rotor (1) in the radial direction. The pump is characterized in that the casing segments (19) have at least one clamping flange (20) having first clamping surfaces (21) at each end of the casing segments and that one or more clamping elements (22, 23), which can be displaced in the axial direction and have second clamping surfaces (24), are placed onto the clamping flange (20), the first clamping surfaces (21) and the second clamping surfaces (24) being designed in such a way and interacting in such a way that the stator casing (3) can be clamped against the stator in the radial direction in the course of an axial displacement of the clamping elements (22, 23).
Abstract:
A claw pump includes: a housing which forms a pump chamber; two rotating shafts which are disposed parallel to each other inside the housing; a pair of rotors which are respectively fixed to the two rotating shafts inside the housing and are provided with hook-shaped claws meshing with each other in a non-contact state; a rotary drive device which drives the pair of rotors so as to be rotated; and a suction port and discharge ports which are formed in a partition wall of the housing. The discharge ports are constituted by a first discharge port and a second discharge port, the first discharge port is formed at a position that communicates with an initial stage compression space formed at an initial stage of a compression stroke in a compression space that is formed by joining a first pocket and a second pocket defined by the pair of the rotors and the partition wall of the housing, and the second discharge port is formed at a position that communicates with an end stage compression space formed at an end stage of the compression stroke in the compression space. The claw pump includes an opening/closing mechanism which opens the first discharge port when a pressure of the initial stage compression space reaches a threshold of atmospheric pressure or higher and closes the first discharge port when the pressure of the initial stage compression space does not reach the threshold.
Abstract:
Pumpe mit verstellbarem Fördervolumen, wobei die Pumpe (1) Folgendes umfasst: (a) ein Pumpengehäuse (2) mit einer Förderkammer (5), (b) einen in der Förderkammer (5) um eine Rotationsachse drehbaren Förderrotor (10) zur Förderung des Fluids, (c) eine Verstelleinrichtung mit (c1) einem zur Verstellung des Fördervolumens der Pumpe (1) im Pumpengehäuse (2) verstellbaren Verstellorgan (20), (c2) einer ersten Stellkammer (K1) zur Erzeugung eines ersten Stelldrucks zur Verstellung des Verstellorgans (20) (c3) und einer zweiten Stellkammer (K2) zur Erzeugung eines zweiten Stelldrucks zur Verstellung des Verstellorgans (20), (d) ein fluidisch betätigbares Ventil (30) zur Verstellung des Stelldrucks der ersten Stellkammer (e) und ein Elektromagnetventil (40) mit einem Druckanschluss (P) für ein von der Hochdruckseite abgezweigtes Stellfluid und einem Entlastungsanschluss (S) für das Stellfluid.