Title:
CONTROL VALVE
Document Type and Number:
Japanese Patent JP2018194167
Kind Code:
A
Abstract:
To provide a control valve capable of having desired flow rate characteristics while suppressing an increase in load torque, an increase in the number of components, and an increase in size.SOLUTION: A control valve comprises: a casing 21; a rotor 22 having a rotary shaft 85 supported rotatably on the casing 21 through bushes 78, 84; and seal cylinders 87, 88 arranged on axially inner sides relative to the bushes 78, 84. The rotary shaft 85 have both end parts formed in a stepped shape to abut on the bushes 78, 84 respectively from axially inside, and areas of axial projections of both the end parts of the rotary shaft 85 are set to be equal to each other. Through holes 32a, 110 for opening parts, located axially outside the seal rings 87, 88, to the atmosphere are formed in a bottom wall part 32 and a lid body 26 of the casing 21, respectively.SELECTED DRAWING: Figure 4
Inventors:
OZEKI AKIFUMI
NAGAI YOSHIHITO
NAGAI YOSHIHITO
Application Number:
JP2018036486A
Publication Date:
December 06, 2018
Filing Date:
March 01, 2018
Export Citation:
Assignee:
YAMADA SEISAKUSHO KK
International Classes:
F16K5/06; F01P7/16; F16J15/3204; F16K3/26
Attorney, Agent or Firm:
Field Saki Satoshi
Junichi Kobayashi
Hiroyuki Hashimoto
Junichi Kobayashi
Hiroyuki Hashimoto