Scientific Lubrication Prevents Bearing Failure in Steel Industry Highvoltage Motors

Steel production environments present distinct operating challenges: high temperatures, heavy loads and high concentrations of dust. These factors place demanding requirements on the mechanical structure of high-voltage motors, including models such as the YKS 900 series. Compared with ordinary industrial settings, motors used in the steel industry require stronger protection, and their maintenance intervals must be adjusted to actual operating conditions rather than relying solely on general maintenance guidelines.

During a recent repair of a 3,000 kW, 10 kV high-voltage motor at a steel enterprise, technicians found that the Babbitt bearings at both ends had burned out. Diagnosis traced the root cause to prolonged inadequate maintenance of the lubrication system, which allowed contaminants to enter the lubricating oil and caused it to lose its lubricating and cooling performance. The motor began to smoke during operation, but operators shut it down in time, avoiding total burnout and major economic loss.

For high-voltage motors that use sliding bearings, the lubrication system is a lifeline. To extend bearing life, enterprises should establish strict lubrication management procedures covering oil quality, oil level and operating temperature.

• Oil quality monitoring: Regularly test the cleanliness of lubricating oil and strictly prevent dust from entering the oil circuit.
• Oil level management: Ensure an adequate oil supply, because a low oil level can directly cause dry friction between moving surfaces.
• Temperature control: Keep lubricating oil within its optimal operating temperature range, as excessively high oil temperatures can accelerate oil oxidation and bearing wear.

For high-voltage motors used in the steel industry, a preventive maintenance strategy is recommended. Regular monitoring of motor operating conditions can identify abnormal vibration, temperature rises or unusual noise at an early stage, allowing faults to be addressed before they escalate. Bearings showing signs of wear should be professionally repaired or replaced promptly to help ensure stable production line operations.