System and device for over-speed protection of a turbo-machine

Patent metadata

Field	Value
Publication number	US-9334752-B2
Application number	US-201213416703-A
Country	US
Kind code	B2
Filing date	Mar 9, 2012
Priority date	Mar 9, 2012
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

This disclosure describes embodiments of a system and device to prevent damage that can occur during an over-speed condition in a turbo-machine. The embodiment includes a fluid circuit with a header, which couples to the turbo-machine, and a hydraulic circuit through which fluid can evacuate the header to a drain. The hydraulic circuit includes a trip header manifold with a pilot element in flow connection with a drain valve element that has an actuator to regulate the flow of fluid from the header. In one example, the pilot element uses solenoid valves to change the pressure of a fluid in the drain valve element and, in particular, maintains the actuator in a first position to prevent fluid to evacuate during normal operating conditions at the turbo-machine. When the over-speed condition occurs the actuator moves to a second position to place the header in flow connection with the drain.

First claim

What is claimed is:

1. A protection system for over-speed protection in a turbo-machine, said system comprising:
a fluid circuit comprising a header, a drain, and a hydraulic circuit coupling the header to the drain, the hydraulic circuit comprising a trip manifold device with a first state that prevents fluid to flow from a first inlet/outlet of the trip manifold device to a second inlet/outlet of the trip manifold device and a second state that permits fluid to flow from the first inlet outlet to the second inlet/outlet,
wherein the second state places the header in flow connection with the drain to permit fluid in the header to flow to the drain, and
wherein the hydraulic circuit comprises a first hydraulic circuit and a second hydraulic circuit that couple with the header to separate drains.

2. The system of claim 1 , wherein the hydraulic circuit directs a supply fluid to the trip manifold device as a pilot supply and a main supply, and wherein the pilot supply pressurizes an actuator in the trip manifold device to maintain the trip manifold device in the first state.

3. The system of claim 2 , further comprising one or more valves disposed in hydraulic circuit between the header and the trip manifold device.

4. The system of claim 1 , further comprising a junction box coupled with the trip manifold device, wherein the junction box provides an interface between turbo-machine controls and elements in the trip manifold device to change the trip manifold device between the first state to the second state.

5. The system of claim 4 , wherein the elements comprise a pair of solenoid valves.

Assignees

• Dietrich Brent Allan
• Stack Ricardo
• Foundoulis John Kirk
• Foss Steven Jackson
• Gen Electric

Inventors

• Dietrich Brent Allan
• Stack Ricardo
• Foundoulis John Kirk
• Foss Steven Jackson

Classifications

• F05D2220/31

  in steam turbines · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F16K31/06

  using a magnet {, e.g. diaphragm valves, cutting off by means of a liquid} · CPC title

• F01D21/18

  involving hydraulic means · CPC title

• F01D21/02 Primary

  Shutting-down responsive to overspeed · CPC title