Patent ID: 7500676
Filing Date: 2009-03-10
Classification: F16J

Abstract:
1. A sliding element for providing a seal against a process fluid being located in either inner circumference or outer circumference of sliding faces of a pair of relatively slidable sliding components, one of said components being a stationary sliding element and the other of said components being a rotary sliding element, said sliding element comprising: a) a first sliding face portion of one of said sliding faces being located in said process fluid side; b) first dimples being disposed on said first sliding face portion, each of said first dimples having at least straight side portions, a maximum length direction of said first dimples being oriented with an inclined angle in a range of from 16 to 55 degrees relative to a tangential direction of a rotational circumference, a longitudinal direction of said first dimples being aligned with said inclined angle, a maximum width of said first dimple being in a range of from 100×10 c) a second sliding face portion of said one of said sliding faces being located in the opposite side relative to said process fluid, said second sliding face portion having second dimples smaller in size than said first dimples, wherein said first dimples are disposed to form first radial lines, a plurality of said first radial lines are disposed along a circumferential direction in a radicalized manner, along each of said first radial lines, at least two first dimples are arranged in order to make a plurality of circles of the first dimples, all of the first dimples along each of said first radial lines are uniformly arrayed and have substantially the same longitudinal length and the same inclined angle, the longitudinal length being greater than the width, said second dimples are disposed to form second radial lines, a plurality of said second radial lines are disposed along a circumferential direction in a radicalized manner, along each of said second radial lines, at least two second dimples are arranged in order to make a plurality of circles of the second dimples, and a ratio of a first radial width (r