Method for manufacturing multi-finger pinned root for turbine blade attached to turbine rotor and turbine blade
A technology for turbine rotors and processing methods, applied to blade support elements, metal processing equipment, manufacturing tools, etc., can solve problems such as the inability to eliminate the adverse effects of rib-like cracks, and achieve the effect of suppressing the decline in fatigue strength
Active Publication Date: 2013-10-23
MITSUBISHI POWER LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When a high-strength material with high notch sensitivity is used for the blade material while maintaining the conventional method of machining the pin hole of the rotor blade, adverse effects caused by rib cracks cannot be ruled out
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] Embodiments of the present invention will be described below using the drawings.
[0027] figure 1 It is a structural diagram of the joint of the turbine rotor blade. The turbine rotor blade junction is a structure combining the turbine rotor blade 2 and the turbine rotor 3 . The turbine rotor blade 2 includes a blade portion 4 and a blade fork 5 that receives steam flow and converts it into rotational energy of the turbine. In addition, the turbine rotor 3 includes a turbine rotating shaft 10 and a rotor disk 6 provided on its outer periphery, and a rotor fork 7 is formed on the rotor disk 6 .
[0028] The blade fork 5 on the turbine rotor blade side and the rotor fork 7 on the turbine rotor side are arranged so as to interlock with each other. In addition, a pin hole 8 penetrating both in the rotational axis direction is formed in the blade fork 5 and the rotor fork 7 . Then, the coupling pin 9 is inserted to fill the pin hole 8 , thereby fixing the turbine rotor ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
In manufacturing a multi-finger pinned root pin-coupling a turbine blade (2) made of a high-strength material and a rotor disc (6), a reamer (21) used to ream a pin insertion hole (8) formed through a turbine blade attachment base is removed from the pin insertion hole (8) while being rotated so as to cause a scratch (15) formed by a chip (12) on the inner surface of the pin insertion hole (8) to be inclined with respect to the axial direction of the pin insertion hole (8). This brings the direction of the scratch (15) on the inner surface of the pin insertion hole (8) and the direction of tensile stress generated on the inner surface of the pin insertion hole (8) adequately close to be parallel to each other. As a result, the fatigue strength reduction caused by the scratch (15) can be inhibited.
Description
technical field [0001] The invention relates to a processing method of a pin joint part of a turbine rotor blade and a turbine rotor and the turbine rotor blade. Background technique [0002] In a steam turbine for power generation, moving blades are attached to a rotating shaft called a turbine rotor, and the force of steam applied to the moving blades rotates the turbine rotor to generate electricity. When the turbine rotor rotates, centrifugal force is generated on the moving blades, and the centrifugal force is received at the junction with the turbine rotor. As the connection method, there are a fork-pin connection method, a saddle connection method, an axial entry connection method, and the like. Among them, the joints of the rotor blade and the turbine rotor in the fork-pin joint method are respectively fork-shaped, and the two are joined by engaging the forks of the two and inserting a joint pin penetrating through the engaging part. When the turbine rotor rotates,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/30
CPCF01D5/3023F05D2230/10B23D75/00F01D5/3053Y10T29/49316
Inventor 平野敦也高桥正明
Owner MITSUBISHI POWER LTD