We offer experimental characterization of meshing gears under quasi-static condition on our self-designed test bench. It is possible to evaluate the Static Transmission Error (STE), main source of vibration and noise and the stresses of two meshing gears.

Flexible

Flexible

Set up any type of gear: spur, helical, bevel, hypoids

Safe

Safe

Barriers and electro-mechanic system for the security

Rigid

Rigid

Blocking system in order to isolate gears measurement

Test bench

Static Transmission Error (STE) is considered as the main source of overloads and Noise, Vibration and Harshness issues in mechanical transmissions. It is defined as the difference between the theoretical angular position of two gears under load in quasi-static conditions and the real one. This parameter strictly depends on the applied torque and the tooth macro and micro-geometry. We have designed a test bench to evaluate the actual Static Transmission Error of two gears under load in quasi-static conditions. In particular, this testbed can be divided in two macro elements: the first one is the mechanism composed by weights and pulleys that generates a driving and a braking torque up to 500 Nm.

The second element is composed by two structures called “supports”: one fixed to the floor and the other movable in order to be as much as possible flexible to set tests for every kind of gears (spur, helical, bevel, hypoid, etc.). Above these two supports the kinematic chain (shafts, bearings, gears), the torque-meter to measure the instantaneous torque and two high precision angular encoders to detect angular differences up to 10-6 rad are mounted.

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