Calculation of bridge crane load lifting mechanism - DBE, Drawings

Contents

CALCULATION OF BRIDGE CRANE LOAD LIFTING MECHANISM

1. Lifting force

2. Polyspast Efficiency

3. The maximum force in the branch of the rope running into the drum at

lifting of cargo

4. Electric motor selection

5. Motor angular speed

6. Rupture force of rope as a whole

7. Select rope type

8. Minimum drum diameter

9. Design Drum Diameter

10. Length of drum with double-sided cutting

11. Check drum dimensions according to conditions

12. Angular speed of drum

13. Gearbox type selection

14. Gear ratio of reduction gear box

15. Load moment on the drum

16. Check of gearbox by load torque

17. Brake selection

18. Brake torque to which the brake is adjusted

19. Condition of motor and drum proximity

20. Brake and drum proximity condition

21. Brake torque to which the brake is adjusted

22. Calculation of drum stage length

23. Minimum trolley gauge

24. Metal consumption of lifting mechanism variants

Conclusions

CALCULATION OF TROLLEY MOVEMENT MECHANISM

1. Mechanism diagram

2. Selection of running wheels

2.1 Determination of preliminary mass of trolley

2.2 Impeller pressure

3. Calculation of movement resistance

4. Electric motor selection

5. Gearbox selection

6. Determination of drive clutch margin factor

wheels with rail at start-up

7. Brake selection

List of literature

Conclusions

1. For a load capacity of 10 t, a multiplicity of 3 and 4 is unacceptable, since the length of the drum is more than 6.5

times its diameter.

2. The use of eight-pole engines is impractical due to the increase in engine weight, brake and mechanism dimensions.

3. The most acceptable option is 62 + 1, i.e. with a six-pole engine, a double polyspast and an increased by 1 pitch drum diameter. It differs from the nearest version 620 a smaller gauge (by 80 mm), and from the next version 82 + 1 also a smaller mass (by 50 kg).