Building Managers have a wide range of responsibilities. One of the most frustrating challenges for both building managers and occupants is dealing with elevator issues. If your elevator isn’t working properly, these five common causes could help you pinpoint the problem.
1) Noisy Bearings and Bearing Failures
A simple inspection can reveal worn-out or contaminated bearings. It’s essential to verify that all electrical grounds are properly secured. Unusual noises from the bearings are often caused by motor vibrations, which can generate stray electrical currents. These currents, while sometimes reducing energy costs, can also lead to accelerated wear on bearings. A practical solution is to install an inductive absorber, which helps neutralize these currents and prevents potential breakdowns.
2) Lubrication Issues
Check fluid levels, examine seals for wear, and identify any potential leaks. It’s also important to test the quality of the oil and lubricants. If an excessive amount of bronze particles appears in the gear case, it suggests premature wear on the crown gear. Similarly, if a high concentration of aluminum is found in a hydraulic elevator’s tank, this could indicate wear in the pump housing. Regular lubrication checks can prevent costly repairs.
3) Misalignment
Proper alignment is crucial for an elevator’s smooth operation. Ensuring that the shaft between the electric motor and other components is correctly positioned helps prevent mechanical issues. Advanced laser measurement tools provide the most precise results, but if one isn’t available, a straightedge and string can also help verify alignment.
4) Power Failures
Infrared thermography can detect sudden temperature fluctuations that might be affecting your elevator’s performance. Elevators rely heavily on the building’s power supply, and voltage inconsistencies can significantly impact their function. Temperature spikes often signal problems such as excessive or insufficient voltage and potential motor failure. If your elevator has a history of power issues, this test can help diagnose the underlying cause.
5) Wear and Tear on Ropes and Sheaves
Elevators operate using ropes and sheaves, which must be kept in good condition. Worn-out sheaves can damage ropes, and frayed ropes can, in turn, cause additional wear on sheaves. The key is to inspect the groove profiles to ensure a proper fit between the two. A visual examination followed by a magnetic measurement and a straightedge test can confirm whether the sheaves need to be regrooved or if the ropes need replacing.
By addressing these issues before an elevator is put back into service, you can prevent minor problems from turning into major expenses. Regular maintenance and early detection are key to keeping elevators running safely and efficiently.
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