Course project on "Design of Chain Conveyor Drive"

Contents

Selection of electric motor

Gearbox calculation

2.1 Determination of power, speed and torque of gear box shafts

Design and check calculation of gears

2.2.1 Slow-moving stage

2.2.2 High speed stage

Preliminary calculation of gear box shafts

Design of toothed cylindrical and conical wheels

2.4.1. Cylindrical gear wheels of external engagement

2.4.2. Bevel gears

Gearbox housing structural dimensions

Selecting Fits for Inner Bearing Ring

Calculation of bearings

Shaft Strength Check

Lubrication of gear train

Calculation of key connection

Calculation of chain transmission

Coupling selection

List of used literature

Applications

Selecting Fits for Inner Bearing Ring

Internal bearing ring tolerance field is selected as per GOST 52071. Since in the reduction gear the inner rings of bearings of all shafts are rotated and the outer rings are in place, local loading takes place, therefore we will have transitional fits .

For the inner bearing ring of the high-speed shaft, we take the size. For the outer bearing ring of the high-speed shaft, which is mounted in the gearbox housing, we take the size:.

For inner ring of low-speed shaft bearing we take size. For the outer ring of the low-speed shaft bearing, which is mounted in the gearbox housing, we take the size:.

For the inner bearing ring of the intermediate shaft we take the size. For the outer bearing ring of the intermediate shaft, which is mounted in the gearbox housing, take the size:.

Coupling selection

Free-running clutches, or overtaking clutches, transmit torque in only one direction. The most widespread in mechanical engineering were roller couplings. The inner part of such a coupling is called an asterisk, and the outer part is called a cage. Both can be part of the coupling. For proper operation of the coupling, it is important that the clip be concentric with the asterisk. For this purpose holder with part installed on it is based on shaft or on other parts on the same shaft. When designing special couplings, you can embed rolling bearings in the race and in the sprocket.