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SUNFUN Group specializes in intelligent and sustainable industrial development. Driving quality advancement in manufacturing across China and the globe through technological innovation, we are committed to creating green value for a better human life.
We have deep expertise in smart energy and smart manufacturing, consistently achieving breakthroughs in precision production. Our capabilities range from 0.001-mm precision machining to the manufacture of components weighing from 0.1 grams to 150 tons. We maintain energy consumption within 0.1% and implement fully intelligent process management—all supported by four decades of specialized experience!
Innovation is the foundation of the growth of our group. We have built an open and collaborative innovation ecosystem, partnering with governments, enterprises, universities, and institutions to enable cooperative innovation and shared value, injecting sustained momentum into the industry.<br/>
As an accredited technology enterprise with its own institute and talent academy, SUNFUN has completed more than ten national-level R&D tasks and undertaken major projects commissioned by agencies such as the NDRC, MOST, and MIIT.
The total length of the cylinder is 5300mm*the width is 3294mm*the height is 6435mm. The total weight of the cylinder is 43800kg.
Product Overview
The H159 Middle Part of the Low-Pressure (LP) Inner Cylinder is a critical structural component of the steam turbine. Designed as a double-flow, double-layer cylinder, it features a specialized structural design separated from the horizontal plane. The component is manufactured using special material welding methods and high-precision machining to meet the rigorous demands of modern power generation and industrial propulsion.
Key Features and Advantages
● Advanced Material Integration: The use of specialized materials optimizes the temperature distribution of the cylinder, ensuring uniform deformation and enhanced operational safety.
● ● Superior Mechanical Properties: The structural design provides excellent shock absorption and vibration damping characteristics.
Enhanced Thermal Efficiency: Effectively addresses technical challenges such as high LP extraction temperatures and significant inlet steam pressure loss.
● Optimized Design: Reflects the latest technological trends in steam turbine development, balancing structural integrity with aerodynamic performance.
Technical Manufacturing & Quality Standards
The production process adheres to strict technical specifications to ensure reliability:
● Welding Standards: * Welding of the carbon steel cylinder body is performed in accordance with SQZ43.112 (covering arc welding, TIG welding, and metal arc welding).
● Post-weld heat treatment is strictly executed per SQZ43.143 technical specifications.
Inspection Protocols:
● Weld defect levels comply with ISO 5817-B and 5817-C.
● 100% Ultrasonic Testing (UT) is conducted according to SQB49.49 for welded joints.
● 100% Surface Defect Inspection is mandatory for all critical areas.
Machining Process:
● Processing follows the "Steam Turbine Metalworking Process Card."
● Utilizes CNC boring and milling, large-scale drilling, and vertical lathes for both rough and precision machining.
● Post-machining includes comprehensive cleaning and anti-rust treatment prior to final assembly.
Product Applications
As the core equipment for energy conversion, this LP inner cylinder is utilized across various sectors:
● Thermal Power Plants: Serves as a primary component in domestic power generation. It plays a vital role in meeting increasing electricity demands and providing peak frequency capacity to stabilize grids with high proportions of intermittent wind and solar energy.
● Industrial Drives: Utilized in large-scale models to drive industrial equipment, including large fans, water pumps, and compressors.
● Marine Propulsion: Employed on ships to drive propellers and provide primary propulsion power.
