A composite assembly method of a multi-layer assembly structure

Abstract

The invention discloses a composite assembly method of a multi-layer assembly structure, which includes the following processes: positioning and connecting an outer ring and a head transition section through process bolts; installing a first section of tiles on the outer ring to make the first section of tiles The size of the gap between the plate and the splash plate on the head adapter section meets the installation requirements, and then install the remaining tiles on the outer ring; then assemble the inner ring and cap on the outer ring and the head adapter section to connect The process bolt is removed, and an assembly bolt is fitted into the bolt hole from which the process bolt has been removed; the process bolt adopts a straight rod structure. The present invention does not require repeated disassembly and assembly of the outer ring and the head transition section, thus avoiding the problems caused by repeated disassembly and assembly, and can improve assembly efficiency and product quality.

Description

technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to a composite assembly method of a multi-layer assembly structure. Background technique [0002] The aero-engine flame tube is mainly composed of a head transition section, an inner ring, an outer ring and a cap. It belongs to a typical multi-layer assembly structure, that is, there are many supporting levels and many assembly parts. Taking the floating wall flame tube as an example, the above four parts are connected by bolts to form a flame tube assembly, and the assembly relationship is as follows: figure 1 As shown, the normal assembly sequence is: first install the cap 3 and the outer ring 4, then install the head adapter section 2, and finally insert the inner ring to complete the assembly, a total of 3 steps. However, due to the requirements of the structure and size, the outer ring 4 and the head adapter section 2 must be assembled before assembly to ensure that the...

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to carry out assembly according to the conventional sequence, but it is necessary to carry out a trial assembly of the transition section between the outer ring and the head before assembly, ensure the gap size and record it, then decompose it into parts, and then follow the normal assembly described above sequential assembly

Because of this, there are the following problems: First, the outer ring 4 and the head adapter section 2 need to be disassembled after trial assembly, and then reassembled, resulting in repeated work, which has a serious impact on the production progress during batch processing; The second is that the gap dimensions DR and DA measured and recorded during the trial assembly have to be decomposed, mainly because figure 1 The middle cap cover 3 needs to be assembled on the outside of the head adapter section 2, and the used assembly bolt 5 has a dead end 5-1, as shown in Figure 3(a), if the assembly on the outside will cause interference, it must be disassembled first , the components will be reassembled during the final assembly, so it is not the final size, and the size will definitely change when the flame tube is finally reassembled, but the size cannot be retested in the component state, so the accuracy of product quality and data have a serious impact

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