Slide component

• US 10,443,737 B2
• Filed: 10/28/2015
• Issued: 10/15/2019
• Est. Priority Date: 11/08/2014
• Status: Active Grant

• Current Assignee: Eagle Industry Company Limited
• Original Assignee: Eagle Industry Company Limited
• Inventors: Itadani, Masatoshi, Sunagawa, Kazumasa, Tokunaga, Yuichiro, Inoue, Hideyuki, Hosoe, Takeshi, Yamakawa, Ryoma, Negishi, Yuta, Kiryu, Kenji, Chiba, Keiichi, Yoshino, Akira, Kubota, Hiroshi
• Primary Examiner(s): Byrd, Eugene G
• Application Number:
  US15/521,608
• Publication Number:
  US 20170241549A1
• Time in Patent Office: 1,448 Days
• CPC Class Codes: F16J 15/34 with slip-ring pressed against a more or less radial face on one member
• CPC Class Codes: F16J 15/3412 with cavities F16J15/3424 takes precedence
• CPC Class Codes: F16J 15/342 with means for feeding fluid directly to the face
• CPC Class Codes: F16J 15/40 by means of fluid

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.

Claims

1. A slide component comprising:

a pair of slide parts that relatively slide on each other,

one of the slide parts being provided, on a low-pressure side of a sealing face thereof, with a negative pressure generation mechanism comprising a negative pressure generation groove, the negative pressure generation groove communicating with a high-pressure fluid side and being separated from a low-pressure fluid side by a land portion,

the other of the slide parts being provided, in a sealing face thereof, with at least one interference groove communicating with the high-pressure fluid side for producing pressure variations in a fluid in the negative pressure generation groove,

wherein the sealing face of the other slide part has (i) a sealing portion at which the other slide part slides on the one slide part, (ii) an outer sealing face margin on an outer diameter side of the sealing portion, and (iii) an inner sealing face margin on an inner diameter side of the sealing portion, wherein the outer sealing face margin has an outer diameter which is larger than an outer diameter of the one slide part, and the inner sealing face margin has an inner diameter which is smaller than an inner diameter of the one slide part,

each interference groove is provided in continuously the sealing portion and one of the outer and inner sealing face margins, and

each interference groove has an end in the one of the outer and inner sealing face margins in a manner that the end communicates with the high-pressure fluid side, and

each interference groove has another end in the sealing portion in a manner extending to a position to radially overlap the negative pressure generation groove,

wherein the at least one interference groove comprises a plurality of interference grooves provided circumferentially, the plurality of interference grooves being arranged at particular intervals such that when one of the interference grooves is at a position facing an upstream end of the negative pressure generation groove, none of the interference grooves is at a position facing a downstream end of the negative pressure generation groove, and when one of the interference grooves is at a position facing the downstream end of the negative pressure generation groove, none of the interference grooves is at a position facing the upstream end of the negative pressure generation groove, so that pressure variations in the fluid in the negative pressure generation groove constantly occur alternately between the upstream end and the downstream end of the negative pressure generation groove when in use.

2. The slide component according to claim 1, wherein the negative pressure generation mechanism is formed from a reverse Rayleigh step mechanism.

3. The slide component according to claim 1, wherein

the one slide part is provided, in the sealing face thereof, with a fluid circulation groove that communicates with the high-pressure fluid side via an inlet portion and an outlet portion and is separated from the low-pressure fluid side by a land portion, and

the negative pressure generation groove has a downstream end communicating with the inlet portion of the fluid circulation groove.

4. The slide component according to claim 1, wherein

the one slide part is provided with a positive pressure generation mechanism comprising a positive pressure generation groove in a portion enclosed by a fluid circulation groove in the sealing face thereof and the high-pressure fluid side, and

the positive pressure generation groove has an upstream side communicating with an inlet portion of the fluid circulation groove.

5. The slide component according to claim 4, wherein the positive pressure generation mechanism is formed from a Rayleigh step mechanism.

6. The slide component according to claim 1, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

7. The slide component according to claim 2, wherein

the one slide part is provided, in the sealing face thereof, with a fluid circulation groove that communicates with the high-pressure fluid side via an inlet portion and an outlet portion and is separated from the low-pressure fluid side by a land portion, and

the negative pressure generation groove has a downstream end communicating with the inlet portion of the fluid circulation groove.

8. The slide component according to claim 2, wherein

the one slide part is provided with a positive pressure generation mechanism comprising a positive pressure generation groove in a portion enclosed by a fluid circulation groove in the sealing face thereof and the high-pressure fluid side, and

the positive pressure generation groove has an upstream side communicating with an inlet portion of the fluid circulation groove.

9. The slide component according to claim 2, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring, and

the rotating-side seal ring is made larger in outside diameter and smaller in inside diameter than the stationary-side seal ring.

10. The slide component according to claim 3, wherein

the one slide part is provided with a positive pressure generation mechanism comprising a positive pressure generation groove in a portion enclosed by the fluid circulation groove in the sealing face thereof and the high-pressure fluid side, and

the positive pressure generation groove has an upstream side communicating with an inlet portion of the fluid circulation groove.

11. The slide component according to claim 3, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

12. The slide component according to claim 4, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

13. The slide component according to claim 5, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

14. The slide component according to claim 7, wherein

the one slide part is provided with a positive pressure generation mechanism comprising a positive pressure generation groove in a portion enclosed by the fluid circulation groove in the sealing face thereof and the high-pressure fluid side, and

the positive pressure generation groove has an upstream side communicating with an inlet portion of the fluid circulation groove.

15. The slide component according to claim 7, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

16. The slide component according to claim 8, wherein the positive pressure generation mechanism is formed from a Rayleigh step mechanism.

17. The slide component according to claim 8, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

18. The slide component according to claim 10, wherein the positive pressure generation mechanism is formed from a Rayleigh step mechanism.

19. The slide component according to claim 10, wherein

the one slide part is a stationary-side seal ring, and

the other slide part is a rotating-side seal ring.

20. The slide component according to claim 14, wherein the positive pressure generation mechanism is formed from a Rayleigh step mechanism.