In the experiment of measuring involute spur gear parameters, which errors of the gear will affect the accuracy?

The size and shape errors of gear positioning reference holes will affect the measurement accuracy of gear parameters.

When the gear mechanism of cylindrical gear is engaged, it has a relatively large tangential sliding speed along its tooth length direction, so it will produce a large friction and wear rate.

On the other hand, the tooth profiles of two wheels are in point contact, and the contact stress will be great, which will make the curved surface press in prematurely and aggravate the tooth wear. Compared with parallel helical gears, the service life and mechanical efficiency of staggered helical gears are much lower.

Extended data:

When the gear mechanism is engaged, it has a large tangential relative sliding speed along its tooth length direction, so it will produce a large wear; On the other hand, when two gear tooth profiles are in point contact, the contact stress value will be very large, which will lead to premature pressing of Q surface and aggravate gear tooth wear. Compared with parallel helical gears, the service life and mechanical efficiency of staggered helical gears are much lower.

The helix angle and helix direction of the two gears of staggered helical gear mechanism are not necessarily the same, so the center distance, angular velocity ratio and relative steering of the two wheels can be adjusted by changing the helix angle α and intestine. This makes the gear mechanism more flexible in transmission geometry and easy to meet the requirements of motion transmission between arbitrary staggered shafts.

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