US 6,047,596 AGranted

Stress test rig for helicopter gear units

AssigneeZF Luftfahrttechnik GmbH

InventorsHerbert Krug, Detlef Bruggemann, Gunter Schroder

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Abstract

The stress test rig consists of a rigidly mounted part which contains the devices uniformly used for all types of test gears and an assembly truck (37) which holds the test gear (16) and the required adapter devices. A test rig gear unit (2) forms a continuous stress circuit with a superimposed gear unit (9), an adaptation gear (23) and a second test rig gear (19) wherein the stress torque is set by a control unit (15) through the superimposed gear unit (9). The regulation variable for the stress torque is determined up to more than 80% by a control network (31). The test rig gear unit (2) is a bevel gear wheel and the superimposed gear unit (9) has a bevel gear step (13) so that the output shaft (14) of the superimposed gear unit (9) is pivoted and has a height adapted to an input shaft of an adaptation gear unit (23) or of a test gear unit (16).

Claims20

Dependent claims

A stress test rig for a helicopter gear unit (16) having:

a motor (1) driving a first test rig gear unit (2), the first test rig gear unit (2) providing a stress circuit via a plurality of shafts;
at least one superimposed gear unit (9);
a second test rig gear unit (19);
a test gear unit (16);
wherein the motor (1) is coupled to an output shaft (8) of the first test rig gear unit (2) by an input shaft (3) and a bevel gear connection (4, 5) contained within said first test rig gear unit (2), the output shaft (8) of the first test rig gear unit (2) lies at an angle relative to said input shaft (3) and is coupled to the at least one superimposed gear unit (9) via a control unit (15), said at least one superimposed gear unit (9) couples the output shaft (8) of the first test rig gear unit (2) to an output shaft (14) of the superimposed gear unit (9) via a bevel gear (13), the output shaft (14) of the superimposed gear unit (9) is pivotable around a rotational axis of said output shaft (8) of the first test rig gear unit (2) and is connectable with an input shaft (17) of said test gear unit (16), and a main output shaft (18) of said gear unit (16) is connectable with said first test rig gear unit (2) via said second test rig gear unit (19).

2 more elements

A stress test rig for a helicopter gear unit (16) having:

a motor (1) driving a first test rig gear unit (2), the first test rig gear unit (2) providing a stress circuit via a plurality of shafts;
at least one superimposed gear unit (9);
a second test rig gear unit (19);
said stress test rig comprising a rigidly mounted unit carrying a plurality of gear unit devices, and an assembly truck (37) supporting said rigidly mounted unit, a test gear unit (16) and associated adaptation devices;
wherein the motor (1) is coupled to an output shaft (8) of the first test rig gear unit (2) by an input shaft (3) and a bevel gear connection (4,5) contained within said first test rig gear unit (2), the output shaft (8) of the first test rig gear unit (2) lies at an angle relative to said input shaft (3) and is coupled to the at least one superimposed gear unit (9) via a control unit (15), said at least one superimposed gear unit (9) couples the output shaft (8) of the first test rig gear unit (2) to an output shaft (14) of the superimposed gear unit (9) via a bevel gear (13), the output shaft (14) of the superimposed gear unit (9) is pivotable around a rotational axis of said output shaft (8) of the first test rig gear unit (2) and is connectable with an input shaft (17) of said test gear unit (16), and a main output shaft (18) of said gear unit (16) is connectable with said first test rig gear unit (2) via said second test rig gear unit (19).

2 more elements

Dependencies are inferred from the claim text.