How to calculate the working life Lh of single shift gear? Working life is 10 year.

The formula for calculating the number of stress cycles of gears is N=60njLh.

For example:

Lh=2*8*300* 15

Lh= working years * working days in a year * working hours in a day.

300 is the number of working days per year, 15 is the working year of 15, and 2 is the number of times when the gear rotates once and the tooth surfaces mesh. Eight is an eight-hour working day.

There are teeth on the rim, which can continuously mesh with mechanical elements to transmit movement and power. The application of gears in transmission appeared very early. At the end of 19, the principle of generating tooth cutting and the special machine tools and tools for tooth cutting using this principle appeared one after another. With the development of production, the stability of gear operation has been paid more and more attention.

Extended data:

Correlation calculation of gears

1, tooth top circle diameter = (number of teeth +2ha*)* modulus

2. Diameter of dividing circle = number of teeth * modulus

3. Tooth root circle diameter = (number of teeth -2ha*-2*hc*)* modulus

4. For standard gears: ha*= 1, hc * = 0.25, other non-standard gears shall be taken separately.

Such as M4, teeth 32

5. The diameter of the addendum circle = (32+2 *1) * 4 =136mm.

6. Diameter of dividing circle =32*4= 128mm.

7. Diameter of root circle = (32-2 *1-2 * 0.25) * 4 =118mm.

This calculation method is for all modular gears (excluding modified gears). Modulus represents the size of gear teeth.

8. Gear module = diameter of dividing circle/number of teeth

References:

Baidu encyclopedia-gear