초록 ▼

A test fixture for testing directional pilot valves as used in connection with turbine engine thrust reversers, and an associated method of use. In a particular embodiment, the test fixture has a base and at least one support mounted to the base to support the directional pilot valve. At least one f

A test fixture for testing directional pilot valves as used in connection with turbine engine thrust reversers, and an associated method of use. In a particular embodiment, the test fixture has a base and at least one support mounted to the base to support the directional pilot valve. At least one fastener permits attachment of the directional pilot valve to the support. An adjustable actuator is also mounted to the base and is capable of stroking the directional pilot valve to simulate valve positions that may be encountered in operation of the valve. The adjustable actuator is also capable of maintaining a force, as set by a technician, against the directional pilot valve.

대표청구항 ▼

We claim: 1. A test fixture assembly for testing an aircraft directional pilot valve having a housing assembly, an inlet, and an opposing actuating sealing rod assembly, comprising: a base; supporting means for supporting the housing assembly coupled to the base; attaching means for attaching the

We claim: 1. A test fixture assembly for testing an aircraft directional pilot valve having a housing assembly, an inlet, and an opposing actuating sealing rod assembly, comprising: a base; supporting means for supporting the housing assembly coupled to the base; attaching means for attaching the housing assembly to the supporting means formed on the supporting means; actuating means for actuating the sealing rod assembly within the supported housing assembly, the actuating means mounted to the base; and a plate projecting from the base, the plate configured to engage the actuating means. 2. A test fixture assembly for testing an aircraft directional pilot valve having a housing assembly, an inlet, and an opposing actuating sealing rod assembly, comprising: a base; at least one support mounted to the base to support the housing assembly; at least one fastener formed on the support to secure the housing assembly to the support; an adjustable actuator mounted to the base, the actuator sized to engage the sealing rod assembly to longitudinally move the sealing rod assembly and hold it in at least one calibration location; and a plate projecting from the base, the plate configured to engage the adjustable actuator. 3. The test fixture assembly of claim 2, wherein the adjustable actuator is a threaded rod mounted parallel to the plane of the base; and wherein the the plate has a threaded hole formed therein to engage the threaded rod. 4. The test fixture assembly of claim 3, wherein the threads of threaded rod and mating threaded hole are substantially about 쩍-13 threads. 5. The test fixture assembly of claim 3, wherein the threaded rod is hollow and has openings at each end. 6. The test fixture assembly of claim 5, further comprising an adapter mounted to the threaded rod proximate to the support, the adapter substantially sized to engage the sealing rod assembly. 7. The test fixture assembly of claim 5, further comprising a grip mounted to the threaded rod. 8. The test fixture assembly of claim 2, further comprising an adjustable aligner mounted to the base. 9. The test fixture assembly of claim 7, wherein the adjustable aligner is a threaded rod perpendicular to the base. 10. The test fixture assembly of claim 2, wherein the at least one fastener is a threaded screw socket. 11. A method of testing an aircraft directional pilot valve having a housing assembly, an inlet, and an opposing actuating sealing rod assembly using a test fixture having a base, a support, and an adjustable actuator, the method comprising: attaching the directional pilot valve housing assembly to the test fixture; applying an initial load force to the sealing rod assembly to move it to an initial position to initialize the sealing rod assembly; adjusting the actuator to hold the sealing rod assembly in the initial position; supplying air at a first air pressure to the directional pilot valve inlet; measuring the air flow through the directional pilot valve with the sealing rod assembly at the initial position; adjusting the actuator to move the sealing rod to a second position; and measuring the air flow through the directional pilot valve with the sealing rod at the second position. 12. The method of claim 11, wherein the initial load force is between about 20 to 30 pounds. 13. The method of claim 11, wherein the initial load force is applied with a force gage slid through the adjustable actuator. 14. The method of claim 11, wherein the air flow through the directional pilot valve with the sealing rod at the initial position is less than about 0.036 pounds per minute. 15. The method of claim 11, wherein the first air pressure supplied to the inlet is between about 49 to 51 pounds per square inch. 16. The method of claim 15, wherein the air flow measured at the initial position is not greater than about 0.036 pounds per minute. 17. The method of claim 11, wherein the second position of the sealing rod is between about 0.34 to 0.38 inch away from the initial seated position. 18. The method of claim 11, further including adjusting the supplied air from a first air pressure to a second air pressure. 19. The method of claim 18, wherein the second air pressure supplied to the inlet is between about 19 to 21 pounds per square inch. 20. The method of claim 19, wherein the air flow measured at the second position is at least 2.6 pounds per minute. 21. The method of claim 11, further comprising measuring the force required to initiate actuation of the sealing rod from an open to a closed position before applying the initial load force. 22. The method of claim 21, wherein the measured force to initiate actuation is between about 3.0 to 5.0 pounds. 23. The method of claim 11, further comprising comparing the measured air flow at the initial position to an acceptable calibration range. 24. The method of claim 11, further comprising comparing the measured air flow at the second position to an acceptable calibration range.