Passenger Lifts
| Course name: | Passenger Lifts |
| Course coordinator: | Artur Jankowiak (Ph.D. Eng), r. 3.15b, Mirosław Szymański (M.Sc.) |
| Level of education: | First cycle (Bsc) |
| Preliminary requirements: | None |
| Contents of education: |
1. Introduction. Classification of short distance transport machines. Lifts – terms and definitions. Classification of passenger lifts. EU Lift Directive and harmonized standards. 2. Location of a lift in a building. Completely enclosed and panoramic shafts (wells). Spaces in the lift shafts (headrooms, pits). Requirements for wells (shafts), machine rooms, machinery spaces and pulley rooms. 3. Logistic issues. Transport among floors. Lift operation cycle. Lift car speed course. Choice of working lift parameters and of the number of lifts for a building. Lift traffic analysis. 4. Construction and principles of operation of electric lift (traction sheave lifts). Basic roping systems of traction sheave lifts. Evaluation of safety factor on suspension ropes. 5. Traction drive theory. Load capacity coefficient. Forces exerted on suspension means (ropes). Evaluation of traction. Static and dynamic conditions. Compensation means (ropes/chains). 6. Lift hoisting machines. Machine’s electric motor operation control. Geared and gearless hoisting machines. 7. Construction of hydraulic lift. Hydraulic drive and control system; hydraulic jacks and valve blocks. Calculations of hydraulic jacks. 8. Safety components (safety gears, locking elements, overspeed governor, safety rope, buffers, rupture valves). 9. Other safety aspects. Technical and non-technical safeguards (traction drive conditions, unlocking zone, load monitoring, safety factors of suspension ropes, safety circuits, safety contacts, car speed monitoring (overspeed governors), monitoring of electrical motor running time, refuge spaces, service areas, relationship between rated load and maximum available car area). 10. Guide rails of the car, counterweight or balancing weight. Calculation of guide rails. 11. Electric powering. Main and administrative power supply. Safeguards. 12. Systems for lift control (transposable control, collective, group – collective). Analysis of electric installation of lifts with different control systems. Systems for automatic lift adjustment. 13. Elements of electromechanical and electronic lift accessories (contractors, relays, limit switches, floor-adjustment switches, stop switches, pulsators, semiconductor elements, logic systems, microprocessor controllers). 14. Lift documentation. Required calculations and instructions. Acceptance tests. Evaluation of compatibility. 15. Supervising of safe lift using – technical inspection (UDT, TDT, WDT). Maintenance issues, periodic and ad-hoc tests, repairs and modernization. |
| Methods of evaluation: | 2 tests |
Laboratory
| Exercise | Exercises topics | Lecturer |
| W1 | Study of energy intensity of drive system of hydraulic lift. |
D. Dąbrowski (M.Sc) r. 0.11e |
| W2 | Control algorithms in passenger lifts. |
A. Zawadzki (Ph.D) r. 4.5b |
| W3 | Dynamics of electric lifts hoisting systems. |
S. Bąk (M.Sc) r. 4.7c |
| W4 | Study of the properties of roping systems. |
A. Jankowiak (Ph.D) r. 3.15b |
| W5 | Evaluation of rope traction in an electric lift. |
P. Grabowski (M.Sc) r. 4.7a |
| W6 | Testing of an elevator belt-driven reeving system. |
P. Grabowski (M.Sc) r. 4.7a |
Exercises W1, W2, W3 stands there are in Laboratory MRC (room 0.2).
Exercises W4, W5, W6 stands there are in Laboratory 4.4b.
Schedule of Laboratory and regulations