| 摘要 |
While meeting contradictory conditions of sealing and lubrication, a fluid is actively taken into sealing faces, and even in a case where foreign substances and bubbles are taken into the sealing faces, wear, burnout, and the like due to leakage of the sealing faces and friction heat generation are prevented. A positive pressure generation mechanism 10 including a positive pressure generation groove 11 is provided on a high pressure side of one of sealing faces of a pair of sliding parts including annular bodies that relatively slide on each other, a negative pressure generation mechanism 12 including a negative pressure generation groove 13 is provided on a low pressure side, a pressure release groove 14 is provided between the positive pressure generation groove 11 and the negative pressure generation groove 13, and further, a radial groove 15 that provides communication between the positive pressure generation groove 11, the pressure release groove 14 and the negative pressure generation groove 13, and a high pressure fluid side is provided on the sealing face, and the radial groove 15 includes an inlet section 15a that provides communication between an upstream side of the positive pressure generation groove 11 and the pressure release groove 14, and the high pressure fluid side, and an outlet section 15b that provides communication between a downstream side of the negative pressure generation groove 13 and the pressure release groove 14, and the high pressure fluid side, the inlet section 15a and the outlet section 15b 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 m on a sealing face end is set to be an obtuse angle. |
