Bleed air selector valve

Patent metadata

Field	Value
Publication number	US-10801509-B2
Application number	US-201816046640-A
Country	US
Kind code	B2
Filing date	Jul 26, 2018
Priority date	Jul 26, 2018
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A bleed air selector valve allows selection and extraction of bleed air from a plurality of different engine bleed air ports to optimize engine efficiency and to maintain bleed requirements using a single line replaceable unit. The bleed air selector valve uses a relatively simple arrangement of poppets, check valves, and thermostatic compensation to augment high and low temperature to within acceptable limits. The bleed air selector valve significantly reduces weight, cost, envelope, and system complexity as compared to known two-port bleed systems with heat exchanger thermal compensation.

First claim

What is claimed is:

1. A bleed air selector valve, comprising:
a flow body having a first inlet port, a second inlet port, a third inlet port, and an outlet port;
a first piston chamber formed in the valve body and having a first vent opening;
a second piston chamber formed in the valve body and spaced apart from the first piston chamber;
a first control pressure passage formed in the valve body, the first control pressure passage in fluid communication with the third inlet port and the second piston chamber; and
a first flow passage disposed between the third inlet port, the outlet port, the first piston chamber, and the second piston chamber;
a first check valve disposed within the flow body between the first inlet port and the outlet port, the first check valve moveable between a closed position and an open position;
a second check valve disposed within the flow body between the second inlet port and the outlet port, the second check valve moveable between a closed position and an open position;
a first flow regulating valve disposed within the first piston chamber, the second piston chamber, and the first flow passage, and is moved between a plurality of open positions and a closed position based in part on fluid pressures in the first piston chamber and the second piston chamber; and
a second flow regulating valve disposed within the flow body between the second check valve and the outlet port, the second flow regulating valve movable between a plurality of open positions and a closed position,
wherein:
the third inlet port is in fluid communication with the outlet port when the first flow regulating valve is in one of the plurality of open positions,
the third inlet port is fluidly isolated from the outlet port when the first flow regulating valve is in the closed position,
the second inlet port is in fluid communication with the outlet port when (i) the second flow regulating valve is in one of its plurality of open positions and (ii) the second check valve is in one of its plurality of open positions, and
the second inlet port is fluidly isolated from the outlet port when the second check valve is in the closed position, regardless of the position of the second flow regulating valve.

2. The bleed air selector valve of claim 1 , wherein:
the first flow regulating valve comprises a first control piston, a second control piston, and a first valve element;
the first control piston is movably disposed within the first piston chamber;
the second control piston is movably disposed within the second piston chamber; and
the valve element is disposed within the first flow passage.

3. The bleed air selector valve of claim 2 , further comprising:
a first bias spring disposed within the first piston chamber and engaging the first control piston, the first bias spring supplying a force that urges the first flow regulating valve toward an open position.

4. The bleed air selector valve of claim 1 , further comprising:
a first thermostatic control passage having a first thermostatic control passage inlet and a first thermostatic control passage outlet, the first thermostatic control passage inlet in fluid communication with the second piston chamber;
a first thermostatic control valve disposed within the first thermostatic control passage between the first thermostatic control passage inlet and the first thermostatic control passage outlet, the first thermostatic control valve movable between a closed position, in which the first thermostatic control passage inlet is fluidly isolated from the first thermostatic control passage outlet, and a plurality of open positions, in which the first thermostatic control passage inlet is in fluid communication with the first thermostatic control passage outlet; and
a first temperature sensitive actuator disposed at least partially in the outlet port and coupled to the first thermostatic control valve, the first temperature actuator responsive to fluid temperature in the outlet port to move the first thermostatic control valve,
wherein the first temperature sensitive actuator and the first thermostatic control valve are configured such that the first temperature sensitive actuator moves the first thermostatic control valve toward the closed position as temperature increases.

5. The bleed air selector valve of claim 1 , further comprising:
a third piston chamber formed in the valve body;
a second control pressure passage formed in the valve body, the second control pressure passage in fluid communication with the first inlet port and the third piston chamber; and
a second flow passage disposed between the second inlet port, the outlet port, and the third piston chamber,
wherein the second flow regulating valve is disposed within the third piston chamber, and the second flow passage, and is moved between its plurality of open positions and its closed position based in part on fluid pressures in the third piston chamber and the second flow passage.

6. The bleed air selector valve of claim 5 , wherein:
the second flow regulating valve comprises a third control piston and a second valve element;
the third control piston is movably disposed within the third piston chamber; and
the second valve element is disposed within the second flow passage.

7. The bleed air selector valve of claim 6 , further comprising:
a second bias spring disposed within the third piston chamber and engaging the third control piston, the second bias spring supplying a force that urges the second flow regulating valve toward an open position.

8. The bleed air selector valve of claim 5 , further comprising:
a second thermostatic control passage having a second thermostatic control passage inlet and a second thermostatic control passage outlet, the second thermostatic control passage inlet in fluid communication with the third piston chamber;
a second thermostatic control valve disposed within the second thermostatic control passage between the second thermostatic control passage inlet and the second thermostatic control passage outlet, the second thermostatic control valve movable between a closed position, in which the second thermostatic control passage inlet is fluidly isolated from the second thermostatic control passage outlet, and a plurality of open positions, in which the second thermostatic control passage inlet is in fluid communication with the second thermostatic control passage outlet; and
a second temperature sensitive actuator disposed at least partially in the outlet port and coupled to the second thermostatic control valve, the second temperature actuator responsive to fluid temperature in the outlet port to move the second thermostatic control valve,
wherein the second temperature sensitive actuator and the second thermostatic control valve are configured such that the second temperature sensitive actuator moves the second thermostatic control valve toward more open positions as temperature increases.

9. A bleed air selector valve, comprising:
a flow body having a first inlet port, a second inlet port, a third inlet port, and an outlet port;
a first piston chamber formed in the valve body and having a first vent opening;
a second piston chamber formed in the valve body and spaced apart from the first piston chamber;
a third piston chamber formed in the valve body and spaced apart from the first and second piston chambers;
a first control pressure passage formed in the valve body, the first control pressure passage in fluid communication with the third inlet port and the second piston chamber;
a first flow passage disposed between the third inlet port, the outlet port, the first piston chamber, and the second piston chamber;
a second control pressure passage formed in th

Assignees

• Honeywell Int Inc

Inventors

• Franconi Robert
• Banta Paul

Classifications

• F04D27/023

  Details or means for fluid extraction · CPC title

• F02C6/08

  the gas being bled from the gas-turbine compressor · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title

• F05D2220/3216

  for a special compressor stage · CPC title

• G05D7/0133

  within the flow-path · CPC title