Coursework on Machine Parts: "Design of Overhead Chain Conveyor Drive"

Contents

Terms of Reference

Introduction

1 Kinematic calculation of the drive

1.1 Electric motor selection

1.2 Transmission service life

1.3 Determination of gear ratio of drive and its stages

1.4 Determination of torque and rotation speeds of shafts

2 Selection of materials and permissible stresses for gears

2.1 Materials and heat treatment of gears

2.2 Allowable contact stresses per

endurance of active tooth surfaces

2.3 Allowable limit contact stresses

2.4 Allowable stresses for bending endurance calculation

2.5 Permissible bending stresses under short-term action

maximum load

3 Calculation of high-speed stage gear train

4 Calculation of low-speed gear train

5 Calculation of external engagement. Chain transmission

6 Calculation of shafts and bearings

6.1 Selection of materials and preliminary calculation of shafts

6.2 Bearing Selection

6.3 Selection of couplings

6.4 Check calculation of shafts and bearings

6.4.1 High-speed shaft

6.4.2 Intermediate shaft

6.4.3 Slow-motion shaft

6.4.4 Drive shaft

7 Calculation of key connections

8 Calculation of safety device

9 Calculation of bolts

10 Description of selected lubrication system

List of literature

Introduction

Conveyors move loose and lumped materials or piece uniform weights in continuous flow over short distances. They are widely used for mechanization of loading and unloading operations, for transporting products in process flow lines, etc.

At present, a large number of various conveying devices are known, distinguishing both in terms of operation and design.

The traction member of the plate conveyor is a chain.

Positive aspects of the design: compact drive with high gear ratio, quiet, smooth running.

Disadvantages: low K.P.D., possible difficulties with lubrication of vertical shafts.