Slide component

Patent metadata

Field	Value
Publication number	US-10598286-B2
Application number	US-201615573113-A
Country	US
Kind code	B2
Filing date	May 13, 2016
Priority date	May 19, 2015
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

In an embodiments, in a sealing face of at least one slide part of a pair of slide parts, a dynamic pressure generation groove 10 is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces, between an end 10a on the leakage side of the dynamic pressure generation groove 10 and the leakage side, a fluid introduction groove 11 which communicates the dynamic pressure generation groove 10 and the leakage side is provided, and the cross-sectional area of the fluid introduction groove 11 is set smaller than the cross-sectional area of the dynamic pressure generation groove 10. The sealing faces are subjected to fluid lubrication and low friction in a steady operation, and leakage of the sealed fluid and entrance of dust into the sealing faces are suppressed.

First claim

The invention claimed is:

1. A slide component comprising a pair of slide parts relatively sliding on each other, wherein
one slide part is a stationary-side seal ring and the other slide part is a rotating-side seal ring, these seal rings have sealing faces formed radially for sealing a sealed fluid from leaking,
in the sealing face of one of the pair of slide parts, a dynamic pressure generation groove is provided, wherein a land portion is provided on each of an inner-diameter side and an outer-diameter side of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts has, in a radial direction, (i) an inner diameter which is set smaller than an inner diameter of the dynamic pressure generation groove, and (ii) an outer diameter which is set larger than an outer diameter of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts is slidably in contact with the land portion on each of the inner-diameter side and the outer-diameter side of the dynamic pressure generation groove of the one of the pair of the slide parts, in a manner that the dynamic pressure generation groove is separated from a sealed fluid side without fluid communication with the sealed fluid side and is separated from a leakage side without direct fluid communication with the leakage side, and
between an end on the leakage side of the dynamic pressure generation groove and the leakage side, a fluid introduction groove which fluidly communicates the dynamic pressure generation groove and the leakage side is provided, wherein a circumferentially cross-sectional area of the fluid introduction groove is set smaller than a circumferentially cross-sectional area of the dynamic pressure generation groove,
wherein the fluid introduction groove is set such that the cross-sectional area thereof decreases from the leakage side toward the dynamic pressure generation groove side.

2. A slide component comprising a pair of slide parts relatively sliding on each other, wherein
one slide part is a stationary-side seal ring and the other slide part is a rotating-side seal ring, these seal rings have sealing faces formed radially for sealing a sealed fluid from leaking,
in the sealing face of one of the pair of slide parts, a dynamic pressure generation groove is provided, wherein a land portion is provided on each of an inner-diameter side and an outer-diameter side of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts has, in a radial direction, (i) an inner diameter which is set smaller than an inner diameter of the dynamic pressure generation groove, and (ii) an outer diameter which is set larger than an outer diameter of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts is slidably in contact with the land portion on each of the inner-diameter side and the outer-diameter side of the dynamic pressure generation groove of the one of the pair of the slide parts, in a manner that the dynamic pressure generation groove is separated from a sealed fluid side without fluid communication with the sealed fluid side and is separated from a leakage side without direct fluid communication with the leakage side, and
between an end on the leakage side of the dynamic pressure generation groove and the leakage side, a fluid introduction groove which fluidly communicates the dynamic pressure generation groove and the leakage side is provided, wherein a circumferentially cross-sectional area of the fluid introduction groove is set smaller than a circumferentially cross-sectional area of the dynamic pressure generation groove,
wherein the fluid introduction groove is arranged to be inclined upstream from the leakage side toward the dynamic pressure generation groove side.

3. A slide component comprising a pair of slide parts relatively sliding on each other, wherein
one slide part is a stationary-side seal ring and the other slide part is a rotating-side seal ring, these seal rings have sealing faces formed radially for sealing a sealed fluid from leaking,
in the sealing face of one of the pair of slide parts, a dynamic pressure generation groove is provided, wherein a land portion is provided on each of an inner-diameter side and an outer-diameter side of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts has, in a radial direction, (i) an inner diameter which is set smaller than an inner diameter of the dynamic pressure generation groove, and (ii) an outer diameter which is set larger than an outer diameter of the dynamic pressure generation groove,
the sealing face of the other of the pair of the slide parts is slidably in contact with the land portion on each of the inner-diameter side and the outer-diameter side of the dynamic pressure generation groove of the one of the pair of the slide parts, in a manner that the dynamic pressure generation groove is separated from a sealed fluid side without fluid communication with the sealed fluid side and is separated from a leakage side without direct fluid communication with the leakage side, and
between an end on the leakage side of the dynamic pressure generation groove and the leakage side, a fluid introduction groove which fluidly communicates the dynamic pressure generation groove and the leakage side is provided, wherein a circumferentially cross-sectional area of the fluid introduction groove is set smaller than a circumferentially cross-sectional area of the dynamic pressure generation groove,
wherein, the fluid introduction groove has a cross-sectional shape, which presents wavy smooth curves at a bottom wall and side walls of the fluid introduction groove.

4. The slide component according to claim 1 , wherein, in the sealing face of at least one slide part of the pair of slide parts, a fluid introduction groove configured so as to communicate with the sealed fluid side and not to communicate with the leakage side is provided.

5. The slide component according to claim 1 , wherein the dynamic pressure generation groove has a spiral shape for sucking the fluid on the leakage side and pumping it to the sealed fluid side.

6. The slide component according to claim 1 , wherein, in the sealing face of at least one slide part of the pair of slide parts, a fluid introduction groove configured so as to communicate with the sealed fluid side and not to communicate with the leakage side is provided.

7. The slide component according to claim 1 , wherein, in the sealing face of at least one slide part of the pair of slide parts, a fluid introduction groove configured so as to communicate with the sealed fluid side and not to communicate with the leakage side is provided.

8. The slide component according to claim 2 , wherein, in the sealing face of at least one slide part of the pair of slide parts, a fluid introduction groove configured so as to communicate with the sealed fluid side and not to communicate with the leakage side is provided.

9. The slide component according to claim 3 , wherein, in the sealing face of at least one slide part of the pair of slide parts, a fluid introduction groove configured so as to communicate with the sealed fluid side and not to communicate with the leakage side is provided.

10. The slide component according to claim 2 , wherein the dynamic pressure generation groove has a spiral shape for sucking the fluid on the leakage side and pumping it to the sealed fluid side.

11. The slide component according to claim 3 , wherein the dynamic pressure generation groove has a spiral shape for sucking the fluid on the leakage side and pumping it to the se

Assignees

• Eagle Ind Co Ltd

Inventors

• Tokunaga Yuichiro
• Inoue Hideyuki
• Kimura Wataru
• Iguchi Tetsuya
• Hosoe Takeshi
• Kasahara Hidetoshi
• Ota Takafumi
• Chiba Keiichi
• Itadani Masatoshi
• KATORI Hikaru

Classifications

• F16J15/08

  with exclusively metal packing · CPC title

• F02B39/00

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title

• F16J15/34

  with slip-ring pressed against a more or less radial face on one member · CPC title

• F16J15/3404 Primary

  and characterised by parts or details relating to lubrication, cooling or venting of the seal · CPC title

• F16J15/342 Primary

  with means for feeding fluid directly to the face · CPC title