Slide component

Patent metadata

Field	Value
Publication number	US-10487944-B2
Application number	US-201615544496-A
Country	US
Kind code	B2
Filing date	Jan 26, 2016
Priority date	Jan 31, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

In an embodiment, in a slide component, a negative pressure generation mechanism 12 that generates negative pressure by relative rotational sliding of a stationary-side seal ring 5 and a rotating-side seal ring 3 is provided on a sealing face of one of the stationary-side seal ring 5 and the rotating-side seal ring 3, and at least the surface of the negative pressure generation mechanism 12 is covered by an adhesion-resistant material film 15. With the configuration, deposition of precipitates on a negative pressure portion of a sealing face can be inhibited.

First claim

The invention claimed is:

1. A slide component comprising an annular stationary-side seal ring fixed to a stationary side, and an annular rotating-side seal ring that rotates with a rotating shaft, the slide component causing opposed sealing faces of the stationary-side seal ring and the rotating-side seal ring to rotate relatively, thereby sealing a high-pressure fluid present on radially one side, as viewed in a radial direction, of the sliding sealing faces rotatable relative to each other, wherein:
a negative pressure generation mechanism that generates negative pressure by relative rotational sliding of the stationary-side seal ring and the rotating-side seal ring is provided on the sealing face of one of the stationary-side seal ring and the rotating-side seal ring;
a fluid circulation groove constituted by an inlet portion for entry of a sealed fluid thereinto from the high-pressure fluid side, an outlet portion for discharge of the sealed fluid therefrom to the high-pressure fluid side, and a connection portion circumferentially connecting the inlet portion and the outlet portion is provided on the sealing face of the one of the stationary-side seal ring and the rotating-side seal ring;
the sealing face having the negative pressure generation mechanism is provided with a film made of a material, other than titanium nitride (TiN), selected from the group consisting of diamond-like carbon (DLC), diamond, fluororesin (PTFE), fluorine, and a silicon resin as an adhesion-resistant material; and
a thickness of the adhesion-resistant material is smaller than a depth of the negative pressure generation mechanism.

2. The slide component according to claim 1 , wherein the negative pressure generation mechanism comprises a dimple formed in the sealing face.

3. The slide component according to claim 1 , wherein the negative pressure generation mechanism is formed in the sealing face, and comprises a pumping groove that discharges a fluid entering the sealing face to a high-pressure fluid side.

4. The slide component according to claim 1 , wherein the negative pressure generation mechanism is provided to be located on a low-pressure side of the sealing face, and comprises a negative pressure generation groove that communicates with a high-pressure fluid side and is separated from a low-pressure fluid side by a land portion.

5. The slide component according to claim 4 , wherein the negative pressure generation mechanism comprises a reverse Rayleigh step mechanism.

6. The slide component according to claim 4 , wherein the negative pressure generation mechanism comprises a reverse spiral groove.

7. The slide component according to claim 1 , wherein a thickness of the adhesion-resistant material is about 0.5 μm.

Assignees

• Eagle Ind Co Ltd

Inventors

• Itadani Masatoshi
• SUNAGAWA Kazumasa
• Chiba Keiichi
• Kiryu Kenji

Classifications

• F16J15/3496

  use of special materials · CPC title

• F04D29/08

  Sealings · CPC title

• F16J15/3424

  with microcavities · CPC title

• F04D29/10

  Shaft sealings · CPC title

• F16J15/164 Primary

  the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid · CPC title