Kontrollventil für einen verstellbaren Taumelscheibenkompressor

摘要

A variable displacement compressor that decreases displacement to reduce compression load without imbalancing the rotation of the drive shaft when the rotating speed of the compressor's drive shaft exceeds a predetermined limit value. The compressor includes a pressurizing passage connecting a crank chamber to a discharge chamber. A rotated guide (57a) rotates integrally with the drive shaft (16). The pressurizing passage is opened and closed by a valve body (58, 62). Orbiting balls (59), which contact the valve body (58, 62), are arranged about the axis (L) of the drive shaft (16) and the rotated guide (57a). The balls (59) follow the rotation of the rotated guide (57a) and orbit about the axis (L). The orbiting radius of the balls (59) varies. A spring (60) urges the balls (59) in a direction decreasing the orbiting radius of the balls (59). When the rotating speed of the drive shaft exceeds the limit value, centrifugal force moves the balls (59) against the force of the spring (60) and increases the orbiting diameter of the balls (59). This moves the valve body (58, 62) and increases the size of the pressurizing passage.