Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction betwee
Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.
대표청구항▼
1. A pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge comprising a plurality of spiral grooves each having a spiral direction that causes fluid to discharge to a high-pressure fluid side, each of the spiral groove
1. A pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge comprising a plurality of spiral grooves each having a spiral direction that causes fluid to discharge to a high-pressure fluid side, each of the spiral grooves being in communication with high-pressure fluid side, whereina buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face on a low-pressure side of the spiral grooves and communicates with low-pressure-side end of each of the spiral grooves. 2. The sliding components according to claim 1, wherein the sealing face is provided, on the high-pressure side, with a plurality of fluid circulation grooves in communication with the high-pressure fluid side in addition to the spiral grooves, wherein each of the spiral grooves is arranged between adjoining two of the fluid circulation grooves on outside of a space enclosed by each of the fluid circulation grooves and the high-pressure fluid side, and whereina plurality of positive pressure generating mechanisms are each provided in the space enclosed by each of the fluid circulation grooves and the high-pressure fluid side. 3. The sliding components according to claim 2, wherein each of the positive pressure generating mechanisms includes a groove with a Rayleigh step, the groove of each of the positive pressure generating mechanisms communicating with an inlet portion of each of the fluid circulation grooves and being isolated by a land portion from an outlet portion of each of the fluid circulation grooves and the high-pressure fluid side. 4. The sliding components according to claim 1, wherein the sealing face is provided, on the high-pressure side of the spiral grooves, with a plurality of positive pressure generating mechanisms. 5. The sliding components according to claim 4, wherein each of the positive pressure generating mechanisms includes a groove with a Rayleigh step, the groove of each of the positive pressure generating mechanisms being isolated from the high-pressure fluid side by a land portion. 6. The sliding components according to claim 5, wherein the sealing face is provided with a pressure releasing groove of annular form, and with a radial groove causing the pressure releasing groove to communicate with the high-pressure fluid side. 7. A pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge comprising a plurality of spiral grooves for discharging fluid to a high-pressure fluid side, each of the spiral grooves being in communication with high-pressure fluid side, whereina buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face on a low-pressure side of the spiral grooves so as to extend along low-pressure-side ends of the spiral grooves,wherein the sealing face is provided, on the high-pressure side of the spiral grooves, with a plurality of positive pressure generating mechanisms, whereineach of the positive pressure generating mechanisms includes a groove with a Rayleigh step, the groove of each of the positive pressure generating mechanisms being isolated from the high-pressure fluid side by a land portion, and whereinthe sealing face is provided with a pressure releasing groove of annular form, and with a radial groove causing the pressure releasing groove to communicate with the high-pressure fluid side. 8. The sliding components according to claim 7, wherein the plurality of positive pressure generating mechanisms comprise a plurality of fluid circulation grooves in communication with the high-pressure fluid side in addition to the spiral grooves, wherein each of the spiral grooves is arranged between adjoining two of the fluid circulation grooves on outside of a space enclosed by each of the fluid circulation grooves and the high-pressure fluid side, and whereina plurality of positive pressure generating mechanisms are each provided in the space enclosed by each of the fluid circulation grooves and the high-pressure fluid side. 9. The sliding components according to claim 8, wherein the groove of each of the positive pressure generating mechanisms communicating with the inlet portion of each of the fluid circulation grooves is isolated by the land portion from an outlet portion of each of the fluid circulation grooves and the high-pressure fluid side.
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이 특허에 인용된 특허 (3)
Sedy Josef (Mount Prospect IL), Face seal with angled grooves and shallow annular groove.
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