Abstract: In an exemplary embodiment, a sliding component includes a pair of sliding parts 4 and 7 sliding relatively to each other and having sliding faces S formed radially for sealing a liquid or a misty fluid as a sealed fluid against leakage. One sliding part is a stationary-side seal ring 7, and the other sliding part is a rotating-side seal ring 4. At least one of the sliding faces S is provided with positive pressure generation mechanisms 11 having positive pressure generation grooves 12 configured to communicate with a circumferential edge of the sliding face S on the sealed-fluid side and not to communicate with a circumferential edge on the leakage side, and discharge grooves 10 disposed at an angle such that upstream ends are located on the leakage side and downstream ends are located on the sealed-fluid side.

Abstract: In an embodiment, a pair of sliding components that slide relative to each other is included. One of the sliding components is a stationary-side seal ring 2, and the other sliding component is a rotating-side seal ring 3. The seal rings 2 and 3 have sliding faces S2 and S3 extending radially, respectively, for sealing sealed fluid against leakage. The sliding faces S2 and S3 are provided with a static pressure groove 22 communicating with a sealing gas supply passage, and pumping grooves 5 capable of controlling the radial flow of sealing gas to a flow from the low-pressure fluid side to the high-pressure fluid side by relative sliding of the sliding faces. By controlling the radial flow of sealing gas at the sliding face, the amount of flow of the sealing gas flowing to the low-pressure fluid side is reduced to improve sealing performance.

Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.

Abstract: In an embodiment, in a slide component, dynamic pressure generation grooves 10 are provided on a sealing face of at least one of a pair of slide parts 4, 7 so as to be isolated with no communication from the sealed fluid side and the leakage side by land portions R of both the sealing faces, and a plurality of independently-formed minute recessed sections 11 is provided at positions on the sealing face IS between the dynamic pressure generation grooves 10 and the leakage side, the positions being separated in the radial direction from the dynamic pressure generation grooves. The slide component can make the sealing faces fluid-lubricant and low frictional and prevent leakage of a sealed fluid and incoming of dust to the sealing faces at the time of normal operation.

Abstract: A sliding component is provided. At least one sliding face of sliding faces sliding relatively to each other of a pair of sliding parts of annular shapes is provided with positive pressure generation mechanisms with positive pressure generation grooves and negative pressure generation mechanisms with negative pressure generation grooves. The positive pressure generation grooves and the negative pressure generation grooves are separated from the opposite-to-sealed-fluid side by a land. Deep grooves deeper than the groove depth of the positive pressure generation grooves and the negative pressure generation grooves are located at least on the opposite-to-sealed-fluid side of the positive pressure generation grooves and the negative pressure generation grooves. The deep grooves are provided in such a manner as to communicate at least with the sealed fluid side.

Abstract: A sliding component includes a pair of sliding parts of which a rotating-side sliding part rotates in both forward and reverse directions. In the sliding component, at least one of the sliding parts has a sliding face provided with positive pressure generation grooves on the sealed fluid side, and a negative pressure generation groove on the opposite-to-sealed-fluid side and separated from the opposite-to-sealed-fluid side by a land, and a deep groove communicating with the sealed fluid side on the sealed fluid side of the negative pressure generation groove. The positive pressure generation grooves each have an upstream end communicating with the deep groove, and the negative pressure generation groove has an upstream inlet and a downstream outlet that communicate with the deep groove, and an intermediate portion between the inlet and the outlet located on the opposite-to-sealed-fluid side of the inlet and the outlet.

Abstract: In an embodiment, a slide component includes one slide part 5 provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism 10 including a negative pressure generation groove 10. The negative pressure generation groove 10a communicates with a high-pressure fluid side and is separated from a low-pressure fluid side by a land portion R. Another slide part 1 is provided, in a sealing face thereof, with at least one interference groove 15 communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove 10a. The at least one interference groove 15 has an end 15a on an inside-diameter side extending to a position to radially overlap the negative pressure generation groove 10a.

Abstract: In an exemplary embodiment of a sliding component, a sliding face S is provided with a first fluid-side negative pressure generation mechanism 12 including a first negative pressure generation groove 13, and is provided with a second fluid-side negative pressure generation mechanism 14 including second negative pressure generation grooves 15 located on the second-fluid side of the first fluid-side negative pressure generation mechanism 12, and is further provided with a dynamic pressure generation mechanism 10 including dynamic pressure generation grooves 11 on at least one of the first-fluid side and the second-fluid side of the first fluid-side negative pressure generation mechanism 12 and the second fluid-side negative pressure generation mechanism 14, and the first negative pressure generation groove 13 is isolated from the second-fluid side by a land R, and the second negative pressure generation grooves 15 are isolated from the first-fluid side by a land R.

Abstract: In an embodiments, a slide component includes a pair of slide parts that relatively slide on each other, one of the slide parts being provided in a sealing face with fluid circulation grooves 10 that communicate with a high-pressure fluid side via inlet portions and outlet portions and are separated from a low-pressure fluid side by land portions, the other of the slide parts being circumferentially provided in a sealing face with a plurality of interference grooves 15, 16, 17, 20 for producing pressure variations in a fluid in the fluid circulation grooves 10, adjacent ones of the interference grooves 15, 16, 17, 20 being set to have different shapes.

Abstract: In an embodiment, a sliding face of at least one sliding part of the pair of sliding parts is provided, along its entire circumference, with a trap groove 10 for trapping leakage fluid, located on a leakage side and spaced from the leakage side by a land. A dust entry reduction means 12 for reducing entry of dust from the leakage side while allowing passage of fluid is formed between lands of the pair of sliding parts on the leakage side of the trap groove 10. At the sliding faces of the pair of sliding parts sliding relatively, entry of dust from the leakage side as well as liquid leakage to the leakage side are suppressed.

Abstract: In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring 7 and a rotating-side seal ring 4) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves 10 spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes 11 between leakage-side ends 10a of the grooves 10 and the leakage side, for communicating the grooves 10 and the leakage side. Each fluid introduction holes 11 is configured such that a dynamic-pressure-generation-groove-side opening 11a open to a corresponding one of the grooves 10 is axially displaced from a leakage-side opening 11b open to the leakage side.

Abstract: A sliding component includes a pair of sliding parts each having an annular sliding face to relatively slide on each other. At least one of the sliding faces has a plurality of dimples disposed thereon. The dimples have substantially the same opening diameter, and are provided independently of each other. The ratio between the depth h and the diameter D of the dimples is set in a range of 1/500 to 1/10. The dimples are arranged randomly such that the area ratio of the dimples within a 120° unit angle in a circumferential direction of a sliding face is in a range of 8% to 50%.

Abstract: An oil seal member is provided at an outside surface of a member performing whirling motion such as a rotary engine rotor. A sliding face of the oil seal member that slides relatively to a stationary-side member is provided with a step extending circumferentially, and has a relatively high surface formed on one radial side with respect to the step and a relatively low surface on the other radial side. The high surface is provided with pumping grooves to pump oil tending to leak from the high surface side into the low surface side, into the high surface side by sliding relatively to the stationary-side member.

Abstract: Provided is a slide component that can prevent deposit formation on a sealing face as well as promoting circulation of a fluid on sealing faces while fulfilling both conflicting conditions of sealing and lubrication, to maintain the sealing function of the sealing faces for a long period of time. The slide component includes a pair of slide parts that relatively slide on each other, one of the slide parts being provided in a sealing face with fluid circulation grooves 10 that communicate with a high-pressure fluid side via an inlet portion and an outlet portion and are separated from a low-pressure fluid side by a land portion, the other of the slide parts being provided in a sealing face with interference grooves 15 that communicate with the high-pressure fluid side and produce pressure variations in a fluid in the fluid circulation grooves 10.

Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The fluid communication paths 12 are provided with spiral grooves 13 for discharging fluid. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.

Abstract: In an embodiment, a sliding part is provided with a mechanism to generate dynamic pressure by means of relative sliding of a pair of sealing faces of the sliding part, which is characterized in that one sealing face is provided with a land 10 for generating dynamic pressure facing the high-pressure fluid side and a seal area 11 facing the low-pressure fluid side, wherein the land 10 and seal area 11 are positioned away from each other in the radial direction and the areas of the sealing face other than the land 10 and seal area 11 are formed lower than these areas to constitute fluid communication paths 12. The lands 10 have different lengths in the radial direction. The fluid entering the grooves for generating dynamic pressure formed on the sealing face is allowed to circulate.

Abstract: To prevent leakage regardless of the level of differential pressure between the inner periphery and outer periphery of the sealing face, the sliding component has dimples provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, and grooves with directionality are provided in a cavitation formation area in each dimple.

Abstract: In an embodiment, a pair of sliding components that slide relative to each other is included. One of the sliding components is a stationary-side seal ring 2, and the other sliding component is a rotating-side seal ring 3. The seal rings 2 and 3 have sliding faces S2 and S3 extending radially, respectively, for sealing sealed fluid against leakage. The sliding faces S2 and S3 are provided with a static pressure groove 22 communicating with a sealing gas supply passage, and pumping grooves 5 capable of controlling the radial flow of sealing gas to a flow from the low-pressure fluid side to the high-pressure fluid side by relative sliding of the sliding faces. By controlling the radial flow of sealing gas at the sliding face, the amount of flow of the sealing gas flowing to the low-pressure fluid side is reduced to improve sealing performance.

Abstract: In an embodiment, in a sliding component, a sliding face S at least one sliding part of a pair of sliding parts is provided with positive pressure generation mechanisms 10 which generate dynamic pressure, an annular pressure release groove 11, and radial grooves 12 which intersect the pressure release groove 11, in which corners 13a and 13b at an intersecting portion of the pressure release groove 11 and the radial grooves 12 are each formed in a curved surface shape such that the pressure release groove 11 and the radial groove 12 are joined by a smooth curved surface. The sliding component can prevent generation of cavitation in a pressure release groove and a radial groove without setting depths of the grooves to be deeper than necessary.

Abstract: In an embodiment, in a sliding component, a sliding face of a stationary-side seal ring 6 has a fluid circulation groove 10 communicating with a high-pressure fluid side via an entrance portion 10a and an exit portion 10b. A rotating-side seal ring 5 has a larger outer diameter and a smaller inner diameter than the seal ring 6. A groove 15 into which a claw is loosely fitted is provided on an outer periphery of the seal ring 5. A width of the groove 15 is smaller than a distance between the portion 10a and the 10b in the circumferential direction. WMR/WSR is set within a range of 0.75<WMR/WSR<1.4 (WMR is a face width between an inner diameter of the groove 15 and an inner diameter 6b of the sliding face; WSR is a face width of the sliding face).