Control valve

Patent metadata

Field	Value
Publication number	US-11703136-B2
Application number	US-202217677351-A
Country	US
Kind code	B2
Filing date	Feb 22, 2022
Priority date	Mar 22, 2021
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A control valve 8 according to the present disclosure includes a casing 21 in which an outlet for a liquid is formed and the liquid is accommodated, a rotor 22 rotatably accommodated in the casing 21 and having a communication port communicating with the outlet, and a sliding ring 131 having a sliding surface 141 a sliding on an outer surface of the rotor in a state of being disposed inside the outlet and causing the outlet and the communication port to communicate with each other according to a rotation position of the rotor 22 , in which a liquid holding portion for holding the liquid between the sliding surface 141 a and the liquid holding portion is provided on the outer surface of the rotor 22 , and the liquid holding portion has a recessed portion for accommodating the liquid.

First claim

What is claimed is:

1. A control valve comprising:
a casing in which an outlet for a liquid is formed and the liquid is accommodated;
a rotor having a communication port communicatable with the outlet and rotatably accommodated in the casing; and
a sliding ring having a sliding surface sliding on an outer surface of the rotor in a state of being disposed in the outlet and causing the outlet and the communication port to communicate with each other according to a rotation position of the rotor,
wherein
a liquid holding portion for holding the liquid between the sliding surface and the liquid holding portion is provided on the outer surface of the rotor,
the liquid holding portion has a recessed portion for accommodating the liquid,
the rotor is formed in a tubular shape extending coaxially with the rotation axis,
a groove extending spirally in an axial direction along the rotation axis as the groove extends to one side in the circumferential direction is formed on an outer peripheral surface of the rotor, and
the groove is formed by arranging a plurality of the recessed portions in the axial direction in a cross-sectional view along the axial direction.

2. The control valve according to claim 1 ,
wherein when a surface roughness of the outer surface is defined as a rotor surface roughness and a surface roughness of the sliding surface is defined as a ring surface roughness, the rotor surface roughness is larger than the ring surface roughness.

3. A control valve comprising:
a casing in which an outlet for a liquid is formed and the liquid is accommodated;
a rotor having a communication port communicatable with the outlet and rotatably accommodated in the casing; and
a sliding ring having a sliding surface sliding on an outer surface of the rotor in a state of being disposed in the outlet and causing the outlet and the communication port to communicate with each other according to a rotation position of the rotor,
wherein
a liquid holding portion for holding the liquid between the sliding surface and the liquid holding portion is provided on the outer surface of the rotor,
the liquid holding portion has a recessed portion for accommodating the liquid, and
when a surface roughness of the outer surface is defined as a rotor surface roughness and a surface roughness of the sliding surface is defined as a ring surface roughness, the rotor surface roughness is larger than the ring surface roughness.

4. The control valve according to claim 3 ,
wherein the rotor surface roughness is in a range of 11 μm<X≤45 μm in terms of ten-point average roughness Rz.

Assignees

• Yamada Mfg Co Ltd

Inventors

• Mimura Tetsuya
• Ozeki Akifumi

Classifications

• F16K11/0856 Primary

  having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug · CPC title

• F16K5/205

  Sealing effected by the flowing medium · CPC title

• F16K11/087

  with spherical plug · CPC title

• F01P2007/146

  using valves · CPC title

• F16K11/06

  comprising only sliding valves {, i.e. sliding closure elements} · CPC title