Steam Turbine Bundle Casing Assembly and Bearing Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly and disassembly of steam turbines with divided casing and diaphragm structures are time-consuming and labor-intensive, especially for larger turbines, requiring significant time and resources.
Innovation Solution
A steam turbine design where the rotor, diaphragms, bearing portion, and seal portion are integrated into a bundle casing, allowing for simultaneous movement and attachment, reducing the need for individual component handling and alignment, and featuring a configuration that separates the bearing portion from the steam flow path to prevent lubricating oil defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the casing and diaphragm are divided into upper and lower halves for assembly, then the steam turbine can be manufactured and maintained with modular components, but the assembly and disassembly time becomes excessively long
Solution Approach 1:
The invention merges the rotor, diaphragms, bearing portion, and seal portion into a single integrated bundle that is accommodated in a bundle casing. This allows the entire rotor assembly to be installed as one unit rather than assembling individual components separately, dramatically reducing assembly time while maintaining the modular benefit of the divided casing structure.
2Manufacturing precision
If the steam turbine components are assembled individually in sequence, then each component can be precisely positioned and installed, but the overall assembly process becomes time-consuming and labor-intensive
Solution Approach 1:
By combining the rotor, diaphragms, bearing portion, and seal portion into an integrated bundle, the invention maintains positioning accuracy through pre-assembly within the bundle casing while dramatically improving productivity. The bundle is positioned as a single unit, eliminating repeated positioning operations for each individual component.
3Device complexity
If the bearing portion is positioned within the steam flow path, then the structure becomes more compact, but the lubricating oil is exposed to high-temperature steam causing defects
Solution Approach 1:
The invention segments the steam flow path from the bearing portion by positioning the bearing outside the steam flow path and accommodating both in separate regions of the bundle casing. This spatial segmentation prevents lubricating oil exposure to high-temperature steam while maintaining a compact overall structure through the integrated bundle design.
4Ease of operation
If multiple components are handled and positioned separately during assembly, then each component can be independently inspected and installed, but the assembly process requires significant time and labor
Solution Approach 1:
The invention combines multiple components into an integrated bundle that can be inspected as a unit before final installation. The bundle casing accommodates the rotor, diaphragms, bearing portion, and seal portion in a consolidated structure, allowing pre-inspection while eliminating the need for separate handling and positioning operations during final assembly.
Data Source
AI summary
A steam turbine includes a casing which is dividable and of which both ends are open, and a bundle accommodated in the casing. The bundle includes a rotor, a plurality of diaphragms which can be divided, a bundle casing to which the diaphragm is fixed inside thereof, and a bearing portion fixed to an inside of the bundle casing on an outside of the diaphragm, and a seal portion fixed to the inside of the bundle casing between the diaphragm and the bearing portion. The bundle casing can be attached and detached to and from the casing in a state of holding the rotor, the diaphragm, the bearing portion, and the seal portion.