A way to improve gear life and reduce damage: slotting

A method that can increase gear life and reduce damage: The relevant instructions for gear grooving are as follows for reference.

mostgearThe damage is caused by high contact stress and bending stress. Slotted gear teeth can reduce these stresses and obtain a smooth operation of the machine.

Gear teeth are typically point contact.Most of its damage is the result of excessively high contact (Hertz) stress and bending stress.At this time, the gear fatigue life depends on the cycle period of high contact stress.

Reducing the Hertzian stress or contact stress can prolong the life span and transmit a higher allowable load, the operation is calm, and the reliability is improved.

If the gear teeth reduce the contact height of the contact area under load, the gear life and reliability can be improved.

This can be started from the following two methods:

One is to analyze gears similar to the analysis of bearings, that is, gears with combined materials.

The other is gear slotting.

Both of these methods can reduce the contact stress and at the same time reduce the shear stress in the lubrication failure area, and then reduce the stress concentration in the tooth root part of the grooved tooth, and finally obtain an iso-strength design that improves the bending stress distribution of the tooth.

In addition, the elasticity of the grooved gear teeth reduces the backlash to a certain minimum, or even eliminates the backlash, and it is possible to obtain zero clearance between the meshing surfaces of the gear teeth, so that the dynamic load on the gear teeth is minimized or Equal to zero.

When there is a gap in the gear teeth in operation, it can usually produce a dynamic load of 10 times the calculated load of the gear.The gear slotting aims to obtain a uniform load on the meshing section.

The flexibility of the grooved teeth can compensate for smaller tooth profile errors.After repeated rotations of the gear teeth, the gear transmission becomes softer and calmer.

Generally, the cost of precision gears required for quiet operation is high, and the role of gear tooth slotting is like an impact or vibration absorber, which compensates for mechanical errors and installation errors, thereby replacing precision gears.

Slotted gear:

Slots on the gear teeth to reduce Hertzian stress (see picture) are suitable for any gear.Grooves of various sizes and forms can reduce the Hertzian stress in the contact area.The result of grooving reduces the concentration of bending stress on the arc part of the tooth root, and makes the load on the dangerous section reasonable distribution.

The above is the relevant instructions that gear grooving can increase product life and reduce damage, including but not limited to, if you have more questions or related needs, you can consult EP Technology for free.