(1) Influence of pinion tooth width on transmission error of helical gear
Figure 1 shows the relationship curve between pinion tooth width and helical gear transmission error. It can be seen that within the range of 22mm~40mm, with the increase of pinion tooth width, the transmission error decreases first, then increases until it remains unchanged, that is, when the pinion tooth width reaches 34mm, the transmission error is stabilized at 0.615 μ m。
(2) Influence of pinion tooth width on hertz contact stress of helical gears
Figure 2 shows the relationship curve between pinion tooth width and helical gear Hertz contact stress. It can be seen from the figure that with the increase of the pinion tooth width, the Hertz contact stress first continues to decrease until the pinion tooth width exceeds 34mm, and then the Hertz contact stress drops to the lowest, 499.347N/mm2.
(3) Influence of pinion tooth width on helical gear transmission efficiency
Figure 3 shows the relationship curve between pinion tooth width and helical gear transmission efficiency. When the tooth width of the pinion varies from 22 mm to 34 mm, the transmission efficiency will increase to 99.8% with the increase of the tooth width; However, when the pinion tooth width exceeds 34mm, the transmission efficiency remains unchanged.
To sum up, properly increasing the tooth width of the pinion is conducive to improving the transmission efficiency and Hertz contact stress of the helical gear, but it will increase the transmission error and thus aggravate the gear vibration noise.
Therefore, the tooth width of big and small gears cannot be increased blin