摘要:
The invention intends to improve a response by utilizing a rotational variable torque of a cam shaft (3). Communication paths respectively communicating an advance hydraulic chamber (9) and a retard hydraulic chamber (10) provided in a second rotary member (5) and a hydraulic connecting passage are provided so as to be communicated, at a time when a control member (20) intending to improve a response by moving a phase angle control slider (19) in an axial direction or a rotational direction in correspondence to an operating state such as an advance, a retard or the like so as to intermittently communicate an advance chamber communication path (26) and a retard chamber communication path (27) with a hydraulic chamber connecting groove (25) only in a section in which a cam shaft variable torque in an operating direction is applied, is controlled in a rotating region, and a relative rotation of a third rotary member and the second rotary member stops.
摘要:
Disclosed is a roller screw including a screw shaft (1) and a nut cage (2) with the screw shaft (1) inserted therein, the roller screw being adapted to convert a rotary motion of either the screw shaft (1) or the cage (2) into a rectilinear or linear motion of the other; the roller screw further including: a plurality of rollers (3), each formed to roll along a flank surface (1a) of the screw shaft; and a plurality of roller bearings (4), each formed to support one of the rollers (3) so as to allow the roller (3) to rotate. At least one of the roller bearings (4) is retained in the case (2) so as to move forward and backward in an axial direction of rotation of the corresponding roller (3) supported by the roller bearing (4).
摘要:
A method of and an apparatus for effecting volume control suitable for use with a compressor for compressing a compressible fluid, such as a refrigerant of the refrigeration cycle, wherein a suction fluid is forcedly closed while a suction step is being performed and the fluid drawn up to then by suction into each working chamber is subjected to adiabatic expansion during the rest of the suction stroke. The fluid in the working chamber subjected to adiabatic expansion is then subjected to adiabatic compression in initial stages of a compression stroke following the suction stroke only for a period corresponding to the period of the adiabatic expansion. An on-off control valve (12) is mounted in a fluid suction passage (1e 2,10b) and operative to be brought, when it is necessary to effect volume control, to a closed position while the suction stroke is being performed, to thereby interrupt the flow of the fluid through the fluid suction passage (10b) to the working chamber.
摘要:
A rotary-vane type fluid machine is constructed such that a rotor (1) is caused to rotate within a casing (2) to increase or decrease the volume of a space created between the outer periphery of the rotor (1) and the inner wall surface of the casing (2) by vane structures (8) which rotate together with the rotor (1) to thereby transfer a fluid by pressure in accordance with the variation in volume of said space. The vane structure (8) has two vanes disposed in substantially symmetrical relationship with respect to a shaft (6) of the rotor and fixed so that they can not moved relative to each other. The fluid machine also comprises a crank mechanism (3, 4, 3a, 4a) which causes the vane structure (8) to radially advance the retreat in order to reciprocally vary a distance between a center of the shaft (6) and a tip end (7) of one vane and a distance between the center of the shaft (6) and a tip end (7) of the other vane in accordance with the rotation of the rotor (1).
摘要:
A rotary-vane type fluid machine is constructed such that a rotor (1) is caused to rotate within a casing (2) to increase or decrease the volume of a space created between the outer periphery of the rotor (1) and the inner wall surface of the casing (2) by vane structures (8) which rotate together with the rotor (1) to thereby transfer a fluid by pressure in accordance with the variation in volume of said space. The vane structure (8) has two vanes disposed in substantially symmetrical relationship with respect to a shaft (6) of the rotor and fixed so that they can not moved relative to each other. The fluid machine also comprises a crank mechanism (3, 4, 3a, 4a) which causes the vane structure (8) to radially advance the retreat in order to reciprocally vary a distance between a center of the shaft (6) and a tip end (7) of one vane and a distance between the center of the shaft (6) and a tip end (7) of the other vane in accordance with the rotation of the rotor (1).
摘要:
The method comprises the steps of arranging a first member (5) to be combined, which has a first connecting bore (5A), and a second member (7) to be combined, which has a second connecting bore (7A), in such a manner that one of said members (5) is piled on the other (7) with said first and second connecting bores (5A, 7A) substantially aligned with each other, inserting a connecting member (9) into said first and second connecting bores (5A, 7A) in said first and second members (5, 7) to be combined, and expanding said connecting member (9) to combine said first and second members (5, 7) together via said connecting member (9). Said connecting member (9) may be a tube of a metal not harder than that of said members (5,7) to be combined.
摘要:
The invention intends to improve a response by utilizing a rotational variable torque of a cam shaft (3). Communication paths respectively communicating an advance hydraulic chamber (9) and a retard hydraulic chamber (10) provided in a second rotary member (5) and a hydraulic connecting passage are provided so as to be communicated, at a time when a control member (20) intending to improve a response by moving a phase angle control slider (19) in an axial direction or a rotational direction in correspondence to an operating state such as an advance, a retard or the like so as to intermittently communicate an advance chamber communication path (26) and a retard chamber communication path (27) with a hydraulic chamber connecting groove (25) only in a section in which a cam shaft variable torque in an operating direction is applied, is controlled in a rotating region, and a relative rotation of a third rotary member and the second rotary member stops.
摘要:
A rotary compressor comprises a rotor (14), a cylinder (18) having an inner surface slidably contacting the rotor (14) at one or more portions thereof, side plates (12,13) disposed on both sides of the cylinder (18) for supporting a rotor driving shaft (11), and axial insert type discharge valves (24, 25) disposed inside the cylinder (18). The cylinder (18) includes an inner cylinder (30) having an inner surface slidably contacting the rotor (14), and an outer cylinder (31) surrounding the whole of the outer periphery of the inner cylinder (30).