Double-headed piston type swash plate compressor

摘要

A double-headed piston type swash plate compressor is provided with a front housing including a suction chamber, a rear housing, a cylinder block, a rotation shaft, and double-headed pistons. The cylinder block includes cylinder bores, a rotation shaft accommodation bore, a communication conduit that communicates the suction chamber with the rotation shaft accommodation bore, and suction passages communicating the rotation shaft accommodation bore to front compression chambers. The rotation shaft includes a groove passage that communicates with the suction passages. Further, the rotation shaft includes an annular groove that communicates the communication conduit with the groove passage. The annular groove includes a front side surface, which is spaced toward the rear housing from an opening of the rotary shaft accommodation bore that faces the front housing.

主权项

1. A double-headed piston type swash plate compressor comprising:
a front housing including a suction chamber; a rear housing; a cylinder block arranged between the front housing and the rear housing, wherein the cylinder block includes
a plurality of cylinder bores, each defining a front compression chamber,a rotation shaft accommodation bore,a swash plate chamber,a communication conduit that communicates the suction chamber with the rotation shaft accommodation bore, anda plurality of suction passages, each communicating the rotation shaft accommodation bore with a corresponding one of the front compression chambers; a rotation shaft supported in the rotation shaft accommodation bore in a rotatable manner and including a circumferential surface, wherein the rotation shaft includes a groove passage formed in part of the circumferential surface, and rotation of the rotation shaft sequentially communicates the groove passage with the suction passages; a plurality of double-headed pistons respectively arranged in the cylinder bores in a movable manner, wherein each of the double-headed pistons defines the front compression chamber at a front side of the corresponding cylinder bore; and a swash plate arranged in the swash plate chamber and fixed to the rotation shaft to rotate integrally with the rotation shaft, wherein the swash plate reciprocates the double-headed pistons in the corresponding cylinder bores, wherein, the rotation shaft includes an annular groove that extends about the circumferential surface of the rotation shaft in a circumferential direction, and the annular groove communicates the communication conduit with the groove passage, and the annular groove includes a front side surface, which is spaced toward the rear housing in an axial direction of the rotation shaft from an open end of the rotary shaft accommodation bore that faces the front housing.