Cylindrical two-stage three-flow gearbox

Contents

1. Kinematic calculations:

1.1 Electric motor selection

1.2 Actual gear ratio

1.3 Torques on shafts

2. Allowable stresses:

2.1 Selection of material and heat treatment of gear wheels

2.2 Allowable contact stresses

2.. 2 a Slow-moving stage

2.2 b High speed stage

2.3 Allowable bending stresses

2.4 Ultimate voltages

3. Design calculation of gears:

3.1 Calculation of slow-moving stage

3.2 Calculation of high-speed stage

4. Calculation of gearbox housing elements

5. Design calculation of shafts

5.1 Slow-moving shaft

5.2 High speed shaft

5.3 Intermediate shaft

6. Refined Shaft Calculation

6.1 Slow-moving shaft

7. Updated calculation of bearings (for low-speed shaft)

8. Selection of couplings

9. Calculation of key connections

10. Oil selection and calculation

11. Gearbox weight calculation

12. Gearbox assembly..... 28 Literature list

Gearbox assembly

Gearbox is assembled in the following sequence:

First, shafts are taken and keys are inserted into key slots, then toothed wheels are planted on the keys. After that bearings are pressed onto mounting sections of shaft.

After the performed operation, an intermediate shaft with bearings and a wheel is inserted into the upper part of the reduction gear, after which a slow-moving shaft is inserted, and then a high-speed shaft. Then covers of reduction gear box are closed and connecting bolts are tightened, then bearing covers are closed. Gearbox is checked for rotation. Oil is poured, tightness is checked and sent for testing - running-in.