VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR

摘要

A variable displacement swash plate type compressor includes a rotary shaft, a swash plate, and an actuator. The actuator includes a partition body, a movable body, and a coupling member located radially outward of the rotary shaft of the swash plate. The movable body has a guide surface for changing the inclination angle of the swash plate and a sliding portion that slides on the rotary shaft or the partition body. When viewed in a direction that is perpendicular to a direction in which the rotational axis of the rotary shaft extends and perpendicular to a first direction, the guide surface has a curved shape that is configured such that a normal of the guide surface and the rotational axis of the rotary shaft intersect in a zone surrounded by the sliding portion in the entire range of change in the inclination angle.

主权项

1. A variable displacement swash plate type compressor comprising:
a housing that has a suction chamber, a discharge chamber, a swash plate chamber communicating with the suction chamber, and a cylinder bore; a rotary shaft that is rotationally supported by the housing and has a rotational axis; a swash plate that is rotational in the swash plate chamber by rotation of the rotary shaft; a link mechanism that is arranged between the rotary shaft and the swash plate and allows change of an inclination angle of the swash plate with respect to a first direction that is perpendicular to the rotational axis of the rotary shaft; a piston reciprocally received in the cylinder bore; a conversion mechanism that causes the piston to reciprocate in the cylinder bore by a stroke corresponding to the inclination angle of the swash plate through rotation of the swash plate; an actuator that is located in the swash plate chamber and capable of changing the inclination angle; and a control mechanism that controls the actuator, wherein the actuator includes a partition body provided on the rotary shaft, a movable body that is located in the swash plate chamber and movable along the rotational axis of the rotary shaft, a control pressure chamber that is defined by the partition body and the movable body and moves the movable body by introducing refrigerant from the discharge chamber, and a coupling member that is located between the movable body and the swash plate and radially outward of the rotary shaft of the swash plate, the movable body includes a guide surface that guides the coupling member and changes the inclination angle of the swash plate as the movable body moves along the rotational axis of the rotary shaft, and a sliding portion that slides on the rotary shaft or the partition body as the movable body moves along the rotational axis of the rotary shaft, and when viewed in a direction that is perpendicular to a direction in which the rotational axis of the rotary shaft extends and perpendicular to the first direction, the guide surface has a curved shape that is configured such that a normal of the guide surface and the rotational axis of the rotary shaft intersect in a zone surrounded by the sliding portion in the entire range of change in the inclination angle.