Patent ID: 9322436
Filing Date: 2016-04-26
CPC Classification: F16C,F16J

Claim Text:
1. A pair of sliding parts comprising annular bodies, in which a positive pressure generation mechanism including a positive pressure generation groove is provided on a high pressure side of one of sealing faces that relatively slide on each other, a negative pressure generation mechanism including a negative pressure generation groove is provided on a low pressure side, a pressure release groove is provided between the positive pressure generation groove and the negative pressure generation groove, and further, a radial groove that provides communication between the positive pressure generation groove, the pressure release groove and the negative pressure generation groove, and a high pressure fluid side is provided on the sealing face, and the positive pressure generation groove, the pressure release groove, the negative pressure generation groove, and the radial groove are isolated from a low pressure fluid side by a seal face, wherein: the radial groove includes an inlet section that provides communication between an upstream side of the positive pressure generation groove and the pressure release groove, and the high pressure fluid side, and an outlet section that provides communication between a downstream side of the negative pressure generation groove and the pressure release groove, and the high pressure fluid side; the inlet section and the outlet section are inclined in the directions in which the sections respectively open from the low pressure side toward the high pressure side; and an intersection angle of both the sections made by a tangent line on a sealing face end is set to be an obtuse angle.