Valve device

Patent metadata

Field	Value
Publication number	US-9903479-B2
Application number	US-201515128413-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	Mar 27, 2014
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A valve device includes: a drive source; a turning member; a valve body, being fixed to the turning member and integrally turned with the turning member; and a valve seat, being sliding contacted with an end face of the valve body opposite to the end face of the valve body contacting with the turning member. The valve seat has at least one outflow hole for fluid passing through the valve device. The valve body has a throttle part being a minute hole that communicates with the outflow hole in a part of a turning angle of the valve body. A flow passage has an opening part provided between opposed faces of the turning member and the valve body, thus the throttle part is communicated with an inflow hole for the fluid and inflow of an individual matter having a size unable to pass through the throttle part is shielded.

First claim

The invention claimed is:

1. A valve device, comprising:
a drive source;
a turning member, being driven and turned by the drive source;
a valve body, being fixed to the turning member in a state that an end face of the valve body and an end face of the turning member in an axial direction are contacted with each other, and the valve body is integrally turned with the turning member; and
a valve seat, being sliding contacted with an end face of the valve body opposite to the end face of the valve body contacting with the turning member;
wherein the valve seat comprises at least one outflow hole for fluid passing through the valve device;
wherein the valve body comprises a throttle part which is a minute hole capable of being communicated with the outflow hole in a part of a turning angle of the valve body; and
wherein a flow passage comprises an opening part which is provided between opposed faces of the turning member and the valve body, so that the throttle part is communicated with an inflow hole for the fluid and so that inflow of an individual matter having a size which is unable to pass through the throttle part is shielded.

2. The valve device according to claim 1 , wherein
the flow passage is a stepped part formed in an outer circumferential edge of the opposed face of the valve body or an outer circumferential edge of the opposed face of the turning member,
a height in an axial direction of the opening part of the stepped part is smaller than a minimum diameter of the throttle part, and
a length in a circumferential direction of the opening part of the stepped part is set to be a length so that an area of the opening part obtained by multiplying the length by the height in the axial direction is larger than an opening area of the throttle part.

3. The valve device according to claim 2 , wherein
the stepped part is provided over an entire periphery of an outer circumferential edge of the valve body or of an outer circumferential edge of the turning member.

4. The valve device according to claim 2 , wherein
the opening part is formed with at least one shielding part for closing a part of an opening of the opening part.

5. The valve device according to claim 2 , wherein
the turning member is a gear member provided with a teeth part on a peripheral face of the turning member, and
the stepped part is provided on the valve body.

6. The valve device according to claim 5 , wherein
the stepped part is communicated with the throttle part.

7. The valve device according to claim 1 , wherein
the valve body comprises a cut-out part which is cut out toward a turning center side from an outer periphery of the valve body on an opposed face to the valve seat, and
the cut-out part exposes an entire periphery of at least one of the outflow holes in a part of a turning angle of the valve body to allow the inflow hole to communicate with the outflow hole.

8. The valve device according to claim 7 , wherein
the cut-out part is disposed at a position different from a position of the throttle part,
the cut-out part is provided with a size which is capable of exposing an entire periphery of at least one of the outflow hole, and
the inflow hole and the outflow hole are communicated with each other through the cut-out part at a position where the cut-out part faces the outflow hole.

9. The valve device according to claim 7 , wherein
the opposed face of the turning member to the valve body is formed with a protruded part which is protruded to a side of the valve body,
the opposed face of the valve body to the turning member is formed with a recessed part to which the protruded part is fitted,
at least a pair of the protruded part and the recessed part are provided,
at least one of the recessed part is a through-hole which is penetrated to the cut-out part, and
the protruded part fitted to the recessed part which is the through-hole is caulked on a side of the cut-out part and thereby the valve body is fixed to the turning member.

10. The valve device according to claim 7 , wherein
the flow passage having the opening part is a stepped part formed in an outer circumferential edge of the opposed face of the valve body or an outer circumferential edge of the opposed face of the turning member,
a height in an axial direction of the opening part of the stepped part is smaller than a minimum diameter of the throttle part, and
a length in a circumferential direction of the opening part of the stepped part is set to be a length so that an area of the opening part obtained by multiplying the length by the height in the axial direction is larger than an opening area of the throttle part.

11. The valve device according to claim 1 , wherein
the throttle part is formed in a thin wall part between recessed parts with larger diameters than the throttle part which are provided at both ends in an axial direction of the valve body, so as to be overlapped with each other in the axial direction of the valve body, and
the throttle part is formed with an opening in a mortar shape.

12. The valve device according to claim 11 , wherein
the flow passage is a stepped part formed in an outer circumferential edge of the opposed face of the valve body or an outer circumferential edge of the opposed face of the turning member,
a height in an axial direction of the opening part of the stepped part is smaller than a minimum diameter of the throttle part, and
a length in a circumferential direction of the opening part of the stepped part is set to be a length so that an area of the opening part obtained by multiplying the length by the height in the axial direction is larger than an opening area of the throttle part.

13. The valve device according to claim 12 , wherein
the stepped part is communicated with the throttle part.

14. The valve device according to claim 13 , wherein
the valve body comprises a cut-out part which is cut out toward a turning center side from an outer periphery of the valve body on an opposed face to the valve seat, and
the cut-out part exposes an entire periphery of at least one of the outflow holes in a part of a turning angle of the valve body to allow the inflow hole to communicate with the outflow hole.

15. The valve device according to claim 1 , further comprising:
a base to which the valve seat is fixed; and
a sealing cover in cup-shape,
wherein the base is covered with the sealing cover so that the inflow hole for the fluid, a rotor of a motor structuring the drive source, the turning member, the valve body, and a valve seat face of the valve seat are covered by the sealing cover, and a valve chamber provided with the inflow hole and the outflow hole is sectioned by the sealing cover together with the base, and
wherein when the throttle part of the valve body is turned to a position facing the outflow hole by the motor, the fluid is passed through the throttle part from the opening part and is flowed out from the outflow hole.

16. The valve device according to claim 15 , wherein
the opening part is a space formed between the opposed face of the turning member on a side of the valve body and the opposed face of the valve body on a side of the turning member,
a width in an axial direction of the space is smaller than a minimum diameter of the throttle part, and
a length in a circumferential direction of the space is set so that a flow amount of the fluid flowing through the space is larger than a flow amount which is capable of passing the throttle part.

17. The valve device according to claim 16 , wherein
the space as the opening

Assignees

• Nidec Sankyo Corp

Inventors

• Yokoe Satoru

Classifications

• F16K3/085 Primary

  the axis of supply passage and the axis of discharge passage being coaxial and parallel to the axis of rotation of the plates · CPC title

• F16K3/08

  with circular plates rotatable around their centres · CPC title

• F16K31/535

  for rotating valves (F16K31/54 takes precedence) · CPC title

• F25B41/04

  Mechanical Engineering · mapped topic

• F16K11/074

  with flat sealing faces · CPC title