Vibration of Helical Gears : Part 2 Experimental Investigation

抄録

Dynamic strain and accelerations of three-directional vibrations of helical gears are measured and their natural frequencies, modes and exciting force are discussed in comparison with those of spur gears. Some interesting facts are found : As in spur gears, in helical gears also the most prominent natural frequency is the one which corresponds to torsional vibration of the geared system. Some natural frequencies and modes which are not found in spur gears appear in vibrations of helical gears. As the result of resonance in these frequencies the axial vibration level and dynamic load of helical gears both increase to some extent. The exciting force due to periodic variation of tooth stiffness decreases with an increase of helix angle. Any remarkable difference is not found between levels of exciting forces of two pairs of helical gears having same helix angle but different face widths.