Auxiliary tooling and assembly and disassembly method for axial assembly and disassembly of precision parts of turbine main engine

Abstract

The invention discloses an auxiliary tool of a turbine main machine for axially mounting and dismounting precise parts and a mounting and dismounting method. The auxiliary tool comprises positioning tools, hoisting tools and pushing tools; the positioning tools comprise outer rings a, support rods a and inner rings a; the hoisting tools comprise outer rings b, support rods b and inner rings b; theinner rings b penetrate through first thread holes; jacking screw rods are mounted in the first thread holes; the pushing tools push the precise parts into or outside a mounting part in the axial direction of a main shaft; and the positioning tools, the hoisting tools and the pushing tools are symmetrically arranged on two side end surfaces of a cylinder block. The method comprises the followingsteps: the precise parts are pushed in front of the mounting part in the cylinder block along the main shaft; the positioning tools and the hoisting tools are mounted; the jacking screw rods are tightened to eject and hoist the main shaft; the precise parts are pushed into the mounting part of the cylinder block by using the screw rod; and the positioning tools and the hoisting tools are dismounted. The auxiliary tool is simple in structure and excellent in mounting consistency, reduces the mounting difficulty under the precondition of guaranteeing the mounting precision, and guarantees no surface damage of the main shaft and the precise parts.

Description

technical field [0001] The invention belongs to the technical field of auxiliary tooling for axially installing components, and in particular relates to an auxiliary tooling for axially installing and disassembling precision components of a turbine main engine and an assembly and disassembly method. Background technique [0002] In the machinery industry, the axial installation of precision parts is often involved. In order to meet the design standards, all parts must be closely matched, especially the parts that cooperate with the rotor, such as bearings, mechanical seals and other high-precision parts. These components are expensive and play a vital role in the unit. At the same time, they need to meet the requirements of fast and accurate disassembly and assembly when the unit is overhauled after operation. Therefore, in the design of the unit, the axial installation of precision parts has become the top priority of the design. [0003] In the assembly state of the unit,...

AI Technical Summary

Problems solved by technology

[0003] In the assembly state of the unit, when no precision parts are installed, the center of gravity of the main shaft mainly falls on other non-precision parts that have been installed in place. The axis will be reduced to about 1mm relative to the normal working axis due to the action of gravity. The radial clearance of the rotor is often only a few wires, so when assembling precision parts in this case, the lower half of the parts will be greatly squeezed and the inner surface will be scratched; in the disassembled state, the center of gravity of the rotor will fall On precision parts, if the precision parts are directly removed axially, it is bound to cause damage

Therefore, in order to facilitate the axial assembly and disassembly of precision parts, the main shaft needs to be lifted to its normal operating position. However, the common jacking tooling in the prior art is a jack or similar tooling, which is easy to scratch the main shaft and precision parts, and cannot Raise the spindle to the exact position, poor assembly operability

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