Distinguish material handling devices, their types and purposes. Select and calculate the elements of the mechanisms for lifting, driving, rotation and elements of the load-bearing structure.

Student responsibilities:

Attendance at lectures and exercises (maximum three absences).

Grading and evaluation of student work over the course of instruction and at a final exam:

Project assignment, oral exam

Upon successful completion of the course, students will be able to (learning outcomes):

1 . Identify material handling devices, according to the type of supply and the area of their application.

2 . solve the degree of efficiency and transfer ratio in working and braking condition for factor pulley and complex mechanism.

3 . Illustrate the given type of pulley with kinematics of speeds on the ropes and the corresponding transfer ratio.

4 . Distinguish between ordinary and double factor pulley of the same transfer ratio.

5 . Distinguish and select the steel rope according to the given operating conditions.

6 . Develop mechanical design of structural elements of transport devices.

Lectures

1. Introduction: General information about transport devices, capacity, volume and mass flow.

2. Load handling: Drive groups, hooks, gripping mechanisms.

3. Transfer ratio: General on transfer ratio.

4. Pulley structure and transfer ratio.

5. Efficiency: general about efficiency in power transmission.

6. Efficiency of the pulley.

7. Ropes: structure and types.

8. Ropes: dimensioning and selection.

9. Pulley design: rope, rope blocks, rope drum.

10. Types of drive 1: manual drive, hydraulic drive.

11. Types of drive 2: electric motor drive, selection of lifting motor.

12. Brakes and retainers: types of brakes, calculation of brakes on time, travel, operation, and heating during braking.

13. Retainers.

14. Lifting mechanisms: structural design.

15. Calculation of the acceptance of the lifting mechanism on the load-bearing structure.

Exercises

1. Calculation of required flow, capacity, and transfer time.

2. Determining the drive group according to working conditions.

3. Standard hook selection.

4. Sizing the hook assembly.

5. Calculation of the transfer ratio of an arbitrary mechanism.

6. Calculation of the transfer ratio for a given pulley.

7. Calculation of power transmission efficiency.

8. Calculation of efficiency for a given pulley.

9. Determining the structure of steel ropes, calculating the load capacity.

10. Rope sizing, calculation of rope fracture length.

11. Calculation and sizing of hooks.

12. Calculation and sizing of drums.

13. Calculation of the required power and selection of the lifting motor, selection of the gearbox of the lifting mechanism.

14. Calculation of brake dimensions, determination of brake life.

15. Calculation of the force in the bolts of the connection of the lifting mechanism with the load-bearing structure.

Compulsory literature:

Recommended literature: