Valve device

Patent metadata

Field	Value
Publication number	US-11255249-B2
Application number	US-201816643734-A
Country	US
Kind code	B2
Filing date	Sep 25, 2018
Priority date	Sep 26, 2017
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A valve device includes: a casing having an outflow port in which a fluid outlet opening is formed; a joint joined to an opening end surface of the outlet opening; a valve accommodated in the casing so as to be rotatable or slidable and in which a communication port that can communicate with the outlet opening is formed; and a sliding ring with a sliding surface for sliding on an outer surface of the valve while being accommodated in the outflow port and communicates the outlet and the communication port based upon a position of the valve. At least the outer surface of the valve includes a first resin material that contains a first resin, at least the sliding surface of the sliding ring includes a second resin material that contains a second resin, and the first resin and the second resin are the same type of resin.

First claim

The invention claimed is:

1. An engine cooling system valve device comprising:
a casing having an outflow port in which a fluid outlet opening in a first direction is formed;
a joint joined to an opening end surface of said outlet in said outflow port;
a valve accommodated in said casing so as to be rotatable or slidable and in which a communication port that can communicate with said outlet is formed;
a sliding ring that has a sliding surface for sliding on an outer surface of said valve while being accommodated in said outflow port and communicates said outlet and said communication port in accordance with a rotating position or a sliding position of said valve; and
a sealing ring interposed between an inner peripheral surface of said outflow port and an outer surface of said sliding ring,
wherein at least said outer surface of said valve comprises a first resin material that contains a first resin as a main component,
at least said sliding surface of said sliding ring comprises a second resin material that contains a second resin as a main component,
said first resin and said second resin are both polyphenylene sulfide, polyether ether ketone or polyamide,
said sliding ring comprises:
a small diameter portion having said outer surface on which said sealing ring slides; and
a large diameter portion which is positioned on a side of said valve in said first direction with respect to said small diameter portion and is increased in diameter with respect to said small diameter portion,

a surface of said large diameter portion facing said valve in said first direction constitutes said sliding surface,
a surface of said large diameter portion facing an opposite side of said valve in said first direction constitutes a facing surface that faces said sealing ring in said first direction, and
an area of said sliding surface is larger than an area of said facing surface.

2. The engine cooling system valve device according to claim 1 , wherein a sliding speed of said sliding surface with respect to said outer surface when said valve rotates or slides is 3 m/min or less.

3. The engine cooling system valve device according to claim 2 , wherein a surface pressure acting between said outer surface and said sliding surface when said valve rotates or slides is 1 MPa or less.

4. The engine cooling system valve device according to claim 3 , wherein a linear expansion coefficient of said second resin material is from 40 to 250% with respect to a linear expansion coefficient of said first resin material.

5. The engine cooling system valve device according to claim 3 , wherein said first resin and said second resin are both polyphenylene sulfide.

6. The engine cooling system valve device according to claim 2 , wherein a linear expansion coefficient of said second resin material is from 40 to 250% with respect to a linear expansion coefficient of said first resin material.

7. The engine cooling system valve device according to claim 2 , wherein said first resin and said second resin are both polyphenylene sulfide.

8. The engine cooling system valve device according to claim 1 , wherein a linear expansion coefficient of said second resin material is from 40 to 250% with respect to a linear expansion coefficient of said first resin material.

9. The engine cooling system valve device according to claim 8 , wherein said first resin and said second resin are both polyphenylene sulfide.

10. The engine cooling system valve device according to claim 1 , wherein said first resin and said second resin are both polyphenylene sulfide.

Assignees

• Yamada Mfg Co Ltd

Inventors

• Ozeki Akifumi
• Nagai Toshihito

Classifications

• F01P2007/146

  using valves · CPC title

• F01P2060/16

  Outlet manifold · CPC title

• F01P2060/08

  Cabin heater · CPC title

• F01P7/165 Primary

  characterised by systems with two or more loops · CPC title

• F16K5/045

  Particular coverings and materials · CPC title