Method for measuring weight moment of turbine blade of gas turbine

Abstract

The invention discloses a method for measuring the weight moment of a turbine blade of a gas turbine. The method comprises the steps of (1) placing an electronic scale and a boss on a horizontal surface, (2 ) erecting two ends of a blade placement table on the electronic scale and the boss, wherein a support point with the electronic scale is A, and a support point with the boss is B, (3) installing the turbine blade on the placement table, reading a value WA of the electronic scale at this time and measuring a vertical distance L between the support point A and the support point B at the sametime, and (4) converting the weight moment according to a torque balance principle, wherein a counterclockwise direction torque W1*(R+L1) is equal to a clockwise direction torque WA*L with the support point B as a rotation point, and therefore, M1=W1*(R+L1)=WA*L is obtained. According to the method, the torque is converted by using the principle of torque balance, a value that cannot be accurately measured is substituted with the value that can not be accurately measured, and therefore, the fast and accurate measurement operation of the weight moment is achieved.

Description

technical field [0001] The invention relates to a measuring method, in particular to a measuring method for the weight moment of a gas turbine blade. Background technique [0002] Turbomachinery is a dynamic fluid machine with blades, which is characterized by the high-speed rotating motion of the rotor equipped with blades. When the fluid (gas / liquid) flows through the passage between the blades, the force generated between the blades and the fluid Interaction, in order to realize the conversion of energy. The most important part of turbomachinery is the rotating element (rotor / impeller), which is installed on the turbine shaft and has blades evenly arranged along the circumference. The specific working principle is as follows: the energy of the fluid is converted into Kinetic energy, when the fluid flows through the rotor, the fluid impacts the blades, pushing the rotor to rotate, thereby driving the turbine shaft to rotate, and then the turbine shaft drives other machine...

AI Technical Summary

Problems solved by technology

Usually, the weight moment is calculated by multiplying the mass M of the blade by the distance from its center of gravity to the center of rotation, where the distance from the center of gravity to the center of rotation is divided into the distance L1 from the center of gravity of the blade to the installation position and the distance R from the installation position to the center of rotation during actual measurement. , the latter distance value R can be directly measured, but the distance from the center of gravity to the installation position is difficult to measure accurately, because the position of the center of gravity of the blade will change according to its size and weight, and it cannot be directly measured, so the weight moment cannot be obtained. Realize precise measurement calculation

Images