Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Toyota Jidoshokki Seisakusho Kabushiki Kaisha

Tatsuya Nakai

Masahiro Kawaguchi

Yasushi Watanabe

Shinichi Suzuki

Hayato Ikeda

Naoya Yokomachi

Masanobu Yokoi

A swash plate type compressor incorporating therein a swash plate having an annular rail raised from each flat face thereof for providing a sliding-contact surface being in contact with sliding-contact surface portions of respective shoes which constitute a rotation-to-reciprocation conversion unit arranged between the swash plate and double-headed pistons reciprocating axial cylinder bores of the compressor. The sliding-contact surfaces of respective shoes bulge outward and have a radius of curvature 'R' in the range of 800 through 1600 millimeters which is smaller than that of the conventional shoes of a swash plate type compressor, so that relatively large wedge shaped gaps are formed between the respective shoes and the swash plate to thereby stably and constantly hold lubricating oil.

Swash plate compressor with sufficiently lubricated shoes

A variable displacement vane compressor for an air conditioning system having at least one crescent chamber (R1, R2) defined by vanes (8), a rotor (6), and a bore of a cylindrical body (3). The cooling capacity is adjusted by rotational displacement of an annular plate member (21) for controlling the amount of refrigerant introduced into the crescent chamber (R1, R2). The annular plate member (21) is rotated by a spool (25) driven by a dynamic pressure balance between a first compartment (S1) to which a refrigerant gas under a discharging pressure is introduced, and of a second compartment (S2) to which an oil under a discharging pressure is introduced. The spool (25) is connected to the annular plate member (21) through a pin (26) penetrating an arcuate slot 27 formed in a front end wall plate member (4). A sealing means (35a, 36) for preventing the leakage of the refrigerant gas from the high pressure region including the first compartment (S 1) to the low pressure region is provided between the annular plate member (21) and the front end wall member (4). A pressurized oil is supplied to the sealing means (35a, 36) through an intermediate passage (37) to enhance the sealing effect of the sealing means (35a, 36). The intermediate passage (37) is separated from the arcuate slot (27) to prevent the high pressure oil from leaking into the first compartment (S1).

Variable displacement vane compressor

A variable displacement vane compressor including a rotor rotatably supported between a pair of side plates secured to a cylinder, vanes movably supported in the rotor to define variable compression chambers in the cylinder, a reciprocally rotatable displacement control plate located between the rotor and one of the side plates for controlling the largest displacement of the compression chambers when closed, a spool chamber provided in one side plate and opposed to the displacement control plate, a spool which reciprocates in the spool chamber to define a first pressure chamber in which a refrigerant having a discharge pressure is introduced and a second pressure chamber in which an oil having the discharge pressure is introduced through a control valve unit in response to the suction pressure, the spool and the displacement control plate being interconnected by a connecting member and moving together, a seal ring between the displacement control plate and the one side plate, for isolating a high pressure area from a low pressure area, and feed passages for introducing the oil having the discharge pressure to the sealing ring. The one side plate has an elongated hole which permits movement of the connecting member extending therethrough, and the seal ring has a diameter smaller than that of an imaginary circle centered on the rotation axis of the rotor and circumscribing the elongated hole. The seal ring is eccentric to the rotation axis and includes the elongated hole in the seal ring.

A variable capacity type vane compressor comprising a cylinder having an oblong cylinder bore and a rotor with radial vanes rotatably inserted in the cylinder so that the radially outer ends of the vanes are in slidable contact with the cylinder bore surface to form compression chambers therebetween. A movable capacity control disk is arranged at an interface between one side plate and the rotor to control the quantity of introduced gas and/or returned compressed gas to vary a capacity of the compressor. The capacity control disk is moved by a spool actuator inserted in a spool cylinder having opposed working chambers. Gas under output pressure is introduced into the first working chamber, and oil under output pressure is introduced into the second working chamber, while a leak passage relieves the oil pressure to an intermediate pressure. A spring is also arranged in the second working chamber to urge the spool, and a valve is arranged in the oil passage close to the second working chamber to regulate the movement of the spool in response to a predetermined requirement.

Growing community of inventors

Kariya, Japan

Tatsuya Nakai