Sliding component
Provided is a sliding component with less fluid leakage. A sliding component has a pair of sliding members at least one of which has positive pressure generation mechanisms and negative pressure generation mechanisms formed at a sliding surface of the sliding member. The negative pressure generation mechanisms are arranged on a low-pressure fluid side with respect to the positive pressure generation mechanisms. Adjoining two of the negative pressure generation mechanisms in a circumferential direction overlap with each other in a radial direction.
1. A sliding component comprising a pair of sliding members at least one of which has positive pressure generation mechanisms and negative pressure generation mechanisms formed at a sliding surface of the sliding member, the negative pressure generation mechanisms being arranged on a low-pressure fluid side with respect to the positive pressure generation mechanisms, wherein
adjoining two of the negative pressure generation mechanisms in a circumferential direction overlap with each other in a radial direction.
2. The sliding component according to claim 1 , wherein
each of the negative pressure generation mechanisms has a negative pressure generation part and a fluid discharge part, the negative pressure generation part of a first one of the adjoining two of the negative pressure generation mechanisms is arranged on the low-pressure fluid side with respect to the fluid discharge part of a second one of the adjoining two of the negative pressure generation mechanisms.
3. The sliding component according to claim 2 , wherein
each of the negative pressure generation mechanisms is a reverse Rayleigh step.
4. The sliding component according to claim 3 , wherein
each of the positive pressure generation mechanisms is a Rayleigh step having a fluid inflow part, and
the sliding member has, at the sliding surface thereof, a fluid introduction groove connecting the fluid discharge part of the reverse Rayleigh step and the fluid inflow part of the Rayleigh step to a high-pressure fluid side.
5. The sliding component according to claim 4 , wherein
the fluid introduction groove is a circulation groove having an inlet and an outlet both of which communicate with the high-pressure fluid side.
6. The sliding component according to claim 5 , wherein
the Rayleigh step is isolated from the low-pressure fluid side by the circulation groove.
7. The sliding component according to claim 6 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.
8. The sliding component according to claim 5 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.
9. The sliding component according to claim 4 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.
10. The sliding component according to claim 3 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.
11. The sliding component according to claim 2 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.
12. The sliding component according to claim 1 , wherein
the low-pressure fluid side is an outer diameter side of the sliding member, and
the high-pressure fluid side is an inner diameter side of the sliding member.