SU1112130A1 - Method for making drum and disc turbine rotor - Google Patents

Abstract

METHOD FOR PRODUCING BARABANPO-DISKOVOGOROTORA SESESE 33CiffiSH23 TURBINB1 comprising cavities closed by welding disks and the trunnions with each other, heat treatment, determine the magnitude and location of the beat-nar uzhny.h povsr.hiostey disks and the trunnions and the axis of flyweights n subsequent balancing; characterized in that, in order to increase the rotor reliability by reducing the unbalance after turning, before welding, further south and south are fixed with marks the size and location of the beats of the internal surfaces of the disks and trunnions relative to their outer surfaces and after heat treatment determine the main central the inertia axis of the closed cavities and use it as an axis of turning.

Description

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And; and) bretting is related to turbomachinery and can find applications in the case of rotors of multistage axial turbines.

A known method of manufacturing a turbine rotor, including its closed cavity, by pairing the disks and trunnions together, heat treating, determining the size and location of the beats of the outer surfaces of the disk and their turning axis and subsequent balancing, and the turning is determined by the beating of the outer surfaces of the disk including closed nolost coaxial with it (1.

However, the application of this method is limited to single-stage small-scale turbines, for which a disk with a cavity that can be machined together with external surfaces from a single installation can be made by turning from one blank.

The closest in technical essence to the invention is a method of manufacturing a drum-disk rotor of a turbine, including closed cavities, by picking disks and pins between themselves, heat treating, determining the size and location of the beats of the outer surfaces of the disks and pins and their turning axis, and then balancing, moreover, the turning axis is determined by the beating of the outer surfaces of the disks and pivots 2.

However, the closed inner cavities of the rotor are formed by surfaces that have undefined beats on the BHenjHHx surface (; tay, reaching significant values, due to the fact that they cannot be processed from one Ustapov, therefore, when determining the axis of rotation of the outer surfaces of the rotor, it is impossible to avoid significant residual unbalance due to the misalignment of the internal cavities, which increases the balancing allowance and uneven distribution of the rotor bearing material and thereby reduces of reliability.

The purpose of the invented method is to increase the reliability of the rotor by reducing the unbalance after 1 H1.

This goal is achieved by the fact that with the method of manufacturing a drum-and-disk rotor of a turbine, including closed conditions, by welding the disks and spigots together, heat treating, determining the size and location of the beat of the outer surfaces of the disks and spigots and axes

their turning and subsequent balancing, before welding, additionally determine and fix with marks the size and location of the beats of the inner surfaces of the disks and pins relative to their outer

0 surfaces, and after heat treatment, determine the main central axis of inertia of the closed cavities and use it as an axis of turning.

The drawing shows a drum-disk rotor of the turbine.

The drum-disk rotor contains disks 1 and trunnions 2 having external surfaces 3 with an axis 4 of turning and internal surfaces 5, the latter being formed by closed cavities 6.

The production of a drum-disk rotor of a turbine, including closed cavities, in this method is carried out by welding the disks I and the trunnions 2 among themselves, by heat treatment, determining the size and location of the external beat

 the surfaces of 3 disks 1 and trunnions 2 and the axis 4 of their turning and subsequent balancing. . Before welding, the value and location of the beats of the inner surfaces 5 of the disk 1 are determined and fixed with marks.

Q and trunnions 2 relative to their outer surfaces 3. After heat treatment, the main central axis of inertia of the closed cavities 6 is determined and used as the axis 4 of the turning.

Use as the axis 4 points of the outer surfaces 3 of the main axis of inertia of the internal cavities provides minimal beating about axis 4 of both the volumes described by the external surfaces 3 and the volumes of the closed cavities 6, as a result of which the unbalance after turning is determined only by the degree of excellence of the measuring technology and can be significantly reduced.

Thus, the allowance for balancing decreases, as does the removal of the rotor's material when balancing, which reduces the uneven distribution of the material over the rotor and increases its reliability.

Claims (1)

METHOD FOR PRODUCING A DRUM-DISK ROTOR TURBINES, including closed cavities, by welding the disks and trunnions between themselves, heat treatment, determining the size and location of the beats of the outer surfaces of the disks and trunnions and the axis of their turning and subsequent balancing, characterized in that, in order to increase the reliability of the rotor by reducing the unbalance after turning, before welding, additionally determine and fix with marks the size and location of the beats of the inner surfaces of the disks and trunnions relative to their outer surfaces and after heat treatment determine the chapters the central axis of inertia of the closed cavities and use it as the axis of turning. I 112130