Electrically controlled actuating device incorporating a thermostatic function, and valve

Patent metadata

Field	Value
Publication number	US-9512932-B2
Application number	US-201314389235-A
Country	US
Kind code	B2
Filing date	Mar 29, 2013
Priority date	Mar 30, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A actuating device includes a fixed portion forming a frame including an inlet intended to receive a fluid, a main outlet and a sampling outlet and a return device for exerting a mechanical force on a movable portion; a movable portion including a shutter moving between an open position and a closed position; a thermostatic device including a conical turning disc, the turning of the disc above a known critical temperature driving the shutter to the closed position of same; a control device allowing a holding force for holding the shutter to be generated, the control device being able to be controlled in such a way that below the critical temperature, the opening or the closing of the valve results from the balance between the holding force and the mechanical force.

First claim

The invention claimed is:

1. An actuating device, comprising:
a fixed portion forming a frame comprising an inlet intended to receive a fluid, a main outlet and a second outlet, and a return device;
a movable portion, wherein the return device is configured to exert a mechanical force on the movable portion, the movable portion comprising:
a shutter comprising a rod moving in translation between an open position of the second outlet and a closed position of said second outlet under the effect of the mechanical force;

a thermostatic device comprising a conical turning disc integral with a collar movable around the rod of the shutter, the turning of the disc above a known critical temperature driving the shutter to the closed position of same;
a control device allowing a holding force for holding the shutter to be generated, the control device being able to be controlled in such a way that below the critical temperature, the opening or the closing of the shutter results from the balance of forces between the holding force and the mechanical force.

2. The actuating device according to claim 1 , wherein the mechanical force corresponds to a return force that is exerted by at least one return spring.

3. The actuating device according to claim 1 , wherein the shutter comprises a core, a rod and an integral closing ball moving in translation to the closed position of same either under the effect of the mechanical force return device, or under the effect of the turning of the disc above the critical temperature.

4. The actuating device according to claim 3 , wherein the conical turning disc mechanically drives the ball into a closed position of the shutter when the temperature exceeds the critical temperature.

5. The actuating device according to claim 4 , wherein the ball comprises a ring integral with the ball, the collar driving said ring on a portion of its surface when the conical turning disc turns around.

6. The actuating device according to claim 1 , wherein the control device is controlled by an electrical set point allowing a magnetic field to be generated by means of a coiling device, the core of the shutter comprising at least in part a ferromagnetic material, the induced magnetic force being able to be greater than the mechanical force so as to maintain the shutter in its open position.

7. The actuating device according to claim 6 , wherein the conical turning disc makes it possible to act on an electrical circuit of the control device by an opening or closing of said circuit so as to generate either a magnetic or hydraulic force allowing the shutter to be closed when the temperature exceeds the critical temperature.

8. The actuating device according to claim 1 , wherein the control device comprises a hydraulic regulating device controlled by a hydraulic control making it possible to introduce a fluid at a given pressure at the inlet of the actuating device, the pressure difference between the inlet of the frame and the main outlet generating a force retaining the shutter and which is greater than the mechanical force so as to maintain the shutter in its open position.

9. The actuating device according to claim 6 , wherein the hydraulic regulating device is a servovalve.

10. The actuating device according to claim 9 , wherein the frame comprises a third outlet enabling the hydraulic control to control the closing of the shutter when pressure is bled at the third outlet and controlling the opening of the shutter by the bleeding of an ambient pressure.

11. The actuating device according to claim 8 , wherein the hydraulic regulating device is a solenoid type valve.

12. A valve comprising an actuating device according to claim 1 .

Assignees

• Snecma

Inventors

• De Wergifosse Huguette
• De Wergifosse Eric

Classifications

• F16K31/002 Primary

  actuated by temperature variation (thermo-electric F16K31/025) · CPC title

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F16K31/566

  using a bistable spring device arranged symmetrically around the actuating stem · CPC title

• F02C9/18

  by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)} · CPC title

• F16K31/0655

  Lift valves · CPC title