Modular design method for fir-shaped blade root blade groove of turbine of gas turbine
A modular design, gas turbine technology, applied in mechanical equipment, computing, engine components, etc., can solve problems such as long design cycle, gas turbine failure, stress concentration at tenon joints, etc., to reduce the number of selection iterations and improve design efficiency , The effect of short design cycle
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[0041] Such as Figure 1-3 Shown is a modular design method of fir-tree-shaped blade root and groove of a gas turbine turbine, which establishes a standard fir-tree-shaped blade-root and groove library, which includes the standards that have been applied to mature units The blade root groove shape line has 3-5 teeth, the tooth pitch is 7.135mm-12.475mm, and the wedge angle is 40°. All standard blade root groove shape lines are stored in the CAD drawing. Include the following steps:
[0042] S1: given the number of blades Z1, the outer diameter of the rim RR1 and the radial height of the groove HH1, each standard blade root groove profile has a standard blade root top pitch Ai and a standard blade groove radial height HHi, calculate formula:
[0043] (2*π*RR1 / (Z1*HH1)):(Ai / HHi)
[0044] Among them, the formula for calculating the pitch at the top of the blade root is 2*π*RR1 / Z1. Screen out the standard blade root groove shape line that makes the value of the formula 0.9-1.1...
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