Regulator flow damping

Patent metadata

Field	Value
Publication number	US-9435311-B2
Application number	US-201414272085-A
Country	US
Kind code	B2
Filing date	May 7, 2014
Priority date	May 7, 2014
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

The subject matter of this specification can be embodied in, among other things, a method that includes providing a fluid at a fluid inlet fluidically connected to an input fluid path, providing a fluid outlet fluidically connected to an outlet fluid path, fluidically connecting the inlet fluid path to the outlet fluid path through a valve, fluidically connecting the inlet fluid and the outlet fluid through a bypass fluid path in parallel with the valve, flowing the fluid from the inlet fluid path to the outlet fluid path through the valve and the bypass fluid path at a regulated fluid flow rate, restricting fluid flow in the bypass fluid path with a first orifice, restricting fluid flow in one of the fluid inlet path or the fluid outlet path with a second orifice, and providing the fluid at the fluid outlet at an outlet fluid flow rate.

First claim

What is claimed is:

1. A fuel flow regulator system for regulating flow, comprising:
a fuel delivery path operable to provide a regulated fuel fluid flow between a fuel inlet and a fuel outlet;
a fuel bypass valve in the fuel delivery path operable to selectively provide a restriction in the fuel delivery path in response to the pressures of the fuel inlet and the fuel outlet of the regulated fuel fluid flow, wherein the bypass valve is fluidically connected to a fluid inlet path fluidically connected with the fuel inlet and a fluid outlet path fluidically connected with the fuel outlet;
a bypass fluid path fluidically connecting the fluid inlet path and the fluid outlet path and parallel with the fuel bypass valve;
a first restricting orifice in the bypass fluid path; and
a second restricting orifice in one of the fluid inlet path or the fluid outlet path.

2. The fuel flow regulator system of claim 1 , wherein the second restricting orifice restricts the fluid outlet path.

3. The fuel flow regulator system of claim 2 , further comprising a third restricting orifice in the fluid inlet path.

4. The fuel flow regulator system of claim 1 , wherein the first restricting orifice has a size selected based on a minimum fluid flow rate.

5. The fuel flow regulator system of claim 4 , wherein the outlet fluid flow rate is the sum of the minimum fluid flow rate and the regulated fluid flow rate.

6. The fuel flow regulator system of claim 4 , wherein the second restricting orifice has a size selected based on a bypass path flow rate, and the outlet flow rate is the sum of the minimum fluid flow rate, the bypass path flow rate, and the regulated fluid flow rate.

7. The fuel flow regulator system of claim 1 , wherein the fluid inlet path further comprises a filter screen configured to resist the flow of ice or contaminant particle flow.

8. The fuel flow regulator system of claim 1 , wherein the fluid inlet path further comprises a heating element.

9. A method of regulating fluid flow comprising:
providing a regulated fluid flow between a fluid inlet and a fluid outlet;
providing an inlet fluid path fluidically connected to the fluid inlet;
providing an outlet fluid path fluidically connected to the fluid outlet;
fluidically connecting the inlet fluid path and the outlet fluid path to a bypass valve in the fluid path;
fluidically connecting the inlet fluid path and the outlet fluid path through a bypass fluid path parallel with the bypass valve;
operating the bypass valve in response to the pressures of the fluid inlet and the fluid outlet to provide a restriction in the fluid path;
restricting fluid flow in the bypass fluid path with a first restricting orifice;
restricting fluid flow in one of the inlet fluid path or the outlet fluid path with a second restricting orifice; and
providing the fluid at the fluid outlet at an outlet fluid flow rate.

10. The method of claim 9 , wherein the second restricting orifice restricts the outlet fluid path.

11. The method of claim 10 , further comprising a third restricting orifice restricting the inlet fluid path.

12. The method of claim 9 , wherein the first restricting orifice has a size selected based on a minimum fluid flow rate.

13. The method of claim 12 , wherein the outlet fluid flow rate is the sum of the minimum fluid flow rate and the regulated fluid flow rates.

14. The method of claim 12 , wherein the second restricting orifice has a size selected based on a bypass path flow rate, and the outlet fluid flow rate is the sum of the minimum fluid flow rate, the bypass path flow rate, and the regulated fluid flow rate.

15. The method claim 9 , wherein the inlet fluid path further comprises a filter screen configured to resist the flow of ice or contaminant particle flow.

16. The method claim 9 , wherein the inlet fluid path further comprises a heating element.

Assignees

• Woodward Inc

Inventors

• Snodgrass Brett J
• Schaefer Paul J
• Lawver Brian K

Classifications

• F02C9/263

  by means of fuel metering valves · CPC title

• Y10T137/0379

  By fluid pressure · CPC title

• F02M69/54 Primary

  Arrangement of fuel pressure regulators · CPC title

• Y10T137/7801

  Balanced valve · CPC title

• F02C7/232 Primary

  Fuel valves {(control of fuel supply by means of fuel metering valves F02C9/263)}; Draining valves or systems (valves in general F16K) · CPC title