Entries by Mike.Lake

Inadequate Oil Supply: Measure the Cause, Not the Symptom

This is Part Three of a three part series on steam turbine tips, discussing the challenge of inadequate oil supply. Directly measuring bearing metal temperature is the most effective way to really determine if a bearing is running hot.  Bearing oil drain temperatures are still being utilized on older machines.  By the time the bearing […]

Inadequate Oil Supply: Don’t Kill Your Turbine on Startup

This is Part Two of a three part series on steam turbine tips, discussing the challenge of inadequate oil supply. Your lube oil temperature needs to be lower at startup and shutdown than at full speed to reduce potential issues. Your turbine’s rotor does not actually ride on the surfaces of its bearings. It rides […]

Power Services Group (PSG) – the Best Alternative to the OEM for Alstom GT24 Gas Turbine Maintenance

During the first half of 2017, PSG successfully performed a number of maintenance activities at combined cycle power plants with Alstom GT 24 Integrated Cycle System (ICS) turbine-generator equipment.  GT24 work executed by the PSG team for multiple customers throughout the continental U.S. and Latin America: Generator field assembly and owner oversight SSS clutch replacement […]

Inadequate Oil Supply: When a Backup isn’t a Backup

This is Part One of a three part series on steam turbine tips, discussing the challenge of inadequate oil supply. The International Association of Engineering Insurers has found that the loss of oil pressure causes the highest frequency of failure in steam turbines worldwide.  Most of these steam turbine failures are caused by an unreliable […]

Alstom STF Steam Turbine

The Power Services Group, Inc. field service team recently completed a turnkey B-inspection on an Alstom STF steam turbine rated at 190 megawatts output. The work scope included disassembly, inspection and reassembly of the HP stop valve, HP control valve, IP stop valves, IP control valves, bearings #1 through 5, and the thrust bearing. PSG’s […]

Casing Repair – Distortion and Erosion

This is Part Three of a three part Turbine Tip series, discussing the most common steam turbine casing problems: cracking, distortion and erosion. The final Turbine Tip in this series discusses two common steam turbine casing problems – Distortion and Erosion. The repair methods employed – grinding, mechanical repair, welding and stress relief – have […]

Casing Repair – Welding Considerations

This is Part Two of a three part Turbine Tip series, discussing the most common steam turbine casing problems: cracking, distortion and erosion.  Welding is a common method to repair turbine casing cracks, but it must be applied with consideration. Most turbine casing alloys can be welded using either of two distinct procedures: stress relieved […]