1. Introduction
Reliability of conveyor systems is a determining factor in the continuity of production processes in Ukrainian industry. Unplanned downtime of the conveyor can lead to significant financial losses, which are estimated in the range of 500 to 2500 euros per hour depending on the production volumes. The ISO 12100 standards define safety requirements for machines that include conveyor equipment. Maintenance (MTO) should be aimed not only at eliminating faults, but also at their preventive prevention.
2. System architecture
A typical conveyor system consists of four main subsystems: the drive assembly (motor and gearbox), the supporting structure (frame), the belt and roller supports (inert elements), as well as the tension and alignment system. The drive assembly, which includes components such as REXROTH 0532VAW20/3FKM330DZ06A1, is responsible for torque transmission. The health of each component is critical to prevent cascading failures.
3. List of critical components
| Component | Specification/Example | Function | Check interval |
|---|---|---|---|
| Drive motor | REXROTH 0532VAW20/3FKM330DZ06A1 | Momentum transmission | Every week |
| Roller supports | C3 class bearings | Ribbon support | Every month |
| Tape | EP-rubber fabric, according to ISO 14890 | Transportation | Every week |
| Tension device | Screw/hydraulic | Tension correction | Every week |
4. Maintenance schedule
| Interval | actions |
|---|---|
| Every day | Visual inspection for the presence of foreign objects, checking the temperature regime of the bearings, cleaning the rollers. |
| Every week | Checking the belt tension, cleaning the drive unit (Rexroth), checking the alignment of the rollers. |
| Every month | Lubrication of bearings, inspection of drum lining wear, vibration measurement (according to ISO 10816). |
| Annually | Full diagnostics of the engine, checking the integrity of the frame, analysis of the condition of the belt for stretching and damage. |
5. Main types of failures
- Roller bearing wear: The most common cause is due to overloading or contamination.
- Mistracking: Occurs due to asymmetric loading or wear of the rollers.
- Overheating of the drive motor: Consequence of insufficient lubrication of the gearbox or exceeding the nominal load.
- Tearing or wear of the tape: Due to friction, mechanical shocks or incorrect tension.
- Loose tension mechanism: Causes the tape to slip on the drum.
6. Troubleshooting guide
To identify the causes of malfunctions, use the following logical algorithm:
- Symptom: The tape moves sideways.
Analysis: Check the parallelism of the rollers and the perpendicularity of the frame. If the rollers are worn out, replace them.
Action: Adjust the position of the roller supports. - Symptom: Vibration of the drive assembly.
Analysis: Check the alignment of the motor shaft and gear mounting.
Action: Perform the alignment, check the rigidity of the fasteners. - Symptom: Bearing overheating.
Analysis: Check for grease and seal tightness.
Action: Clean, lubricate to specification or replace bearing.
7. Spare parts strategy
To minimize downtime, it is recommended to implement an ABC inventory analysis strategy:
- Category A (Critical, high turnover): Bearings, drive belts, Rexroth components (like REXROTH 0532VAW20/3FKM330DZ06A1). Delivery time should be minimal, stock availability is mandatory.
- Category B (Medium priority): Rollers, tension mechanisms.
- Category C (Low Priority): Frame elements, protective covers.
We recommend using UNITEC-D E-Catalog for prompt search and ordering of original components with clear delivery dates.
8. Integration of condition monitoring
To implement predictive maintenance, it is necessary to use modern monitoring methods:
- Vibration analysis: Tracking of frequency characteristics of bearings according to ISO 10816 to detect defects in the early stages.
- Thermography: Control of overheating of engines and bearing units.
- Tip wear sensors: Ultrasonic tape thickness measurement for resource prediction.
9. Conclusion
Effective operation of the conveyor system requires a systematic approach to maintenance. Adherence to maintenance schedules and the use of original spare parts significantly extend the life of the equipment and reduce the total cost of ownership. Check out the range of components in our UNITEC-D E-Catalog.
10. List of references
- ISO 10816: Mechanical vibrations. Measurement and assessment of machine vibration.
- ISO 12100: Machine safety. General design principles.
- ISO 14890: Conveyor belts — rubber fabric belts for transporting bulk goods.
