Ultra supercritical 660MW steam turbine

Ultra-supercritical 660MW class steam turbine

The steam turbine serves as the core energy conversion equipment in thermal power plants. Its main structure consists of a stator and rotor, with steam seals installed between them. The stator is supported by a base plate and sliding pin system. To regulate steam intake, a steam distribution mechanism is installed. For safety assurance, a turning device is also equipped.

The 660MW ultra-supercritical steam turbine series features single-shaft configurations with either four-cylinder four-pass or three-cylinder two-pass designs. Capable of operating with wet or air cooling systems, these turbines deliver substantial steam extraction capacity to meet heating and industrial demands. Through continuous innovation, the company has achieved multiple industry firsts, establishing its leadership in cost-effectiveness, safety, and operational flexibility that has earned widespread acclaim from customers.

The ultra-supercritical 660MW-class steam turbine operates within a power range of 600MW to 700MW, with steam inlet parameters varying from 25MPa/600℃/600℃ to 30MPa/610℃/630℃. It employs a full-cycle steam injection system with a make-up steam valve, running in a fixed-slide-fixed cycle mode. The unit features high-low-pressure combined start-up and a rated speed of 3000r/min.

technological superiority ：

1) High performance:

small diameter, multi-stage, high efficiency;

AIBT blade flow and CFD structural flow optimization design;

The measured heat consumption of multiple units is less than the designed heat consumption.

2) Unique structure:

The cylinder type high pressure cylinder can bear higher main steam pressure/temperature;

N+1 bearing support with a short shaft system;

The moving and stationary parts expand in the same direction, and the sliding pin system is smooth.

3) Flexible operation:

Built-in stress/temperature control with one-click activation;

It can reach the rated speed from 0 in just 5 minutes.

4) Easy to maintain:

The unit has high reliability and overhaul every 12 years;

High and medium pressure cylinders are assembled in the factory and shipped as a whole.

The integrated auxiliary system of the combined tank.