Steam turbine moving blade locking device and method, blade using same, and steam turbine

Abstract

The invention discloses a turbine moving blade locking device. The turbine moving blade locking device includes intermediate connecting blocks and locking toothed pins, wherein the locking toothed pins are used for locking a locking moving blade and the intermediate connecting blocks on a rotor through the toothed structures; each locking toothed pin can be divided into two parts; the two parts of each locking toothed pin are respectively connected onto the intermediate connecting blocks and the rotor during mounting, and are rotated by 90 DEG and punch-riveted after assembly to lock the intermediate connecting blocks and the locking moving blade. The invention further discloses a turbine moving blade locking method, a turbine blade employing the turbine moving blade locking device and method, and a turbine. The locking device provided by the invention achieves simplicity and high convenience in processing, is highly reliable, facilitates processing and blade assembly and replacement, and is applicable for the locking of moving blades which are circumferentially assembled on a wheel-drum type rotor structure.

Description

technical field [0001] The invention belongs to the field of steam turbines, and more specifically relates to a locking device and method for moving blades of a steam turbine, a blade and a steam turbine using the locking device, which can be used for locking of various wheel-drum rotors for circumferentially assembling moving blades. Background technique [0002] The steam turbine consists of a rotor and a stator. The rotor is usually a disc-type and drum-type structure. The rotor is equipped with moving blades. For the drum-type rotor, since there is no disc, the moving blades adopt a circumferential assembly structure, such as an inverted T shape, Double inverted T shape, etc. There are one or two locking moving blades in each stage of circumferentially assembled moving blades, usually the last blade in each stage, which is used to limit other moving blades on the rotor so that they cannot fall off from the rotor. There are two types of traditional moving blade locking s...

AI Technical Summary

Problems solved by technology

In this structure, since the rotor and the final blade are processed separately, it is necessary to ensure that the tooth profiles of the two are consistent. In addition, it is difficult to ensure that the position of the final blade is exactly the same as the position of the tooth pin on the rotor when the blade is assembled, which brings difficulties to the assembly. huge problem

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