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Disassembling method of cold-end unit body

A unit body, cold end technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of rotor stuck, rotor and stator axial friction, etc., to improve reliability and ensure the progress of scientific research and production.

Active Publication Date: 2019-11-26
CHINA HANGFA SOUTH IND CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention provides a method for decomposing a cold-end unit body to solve the existing technical problems of rotor jamming and rotor-stator axial friction in the process of disassembling the cold-end unit body

Method used

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  • Disassembling method of cold-end unit body
  • Disassembling method of cold-end unit body

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Embodiment Construction

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0035] When the engine is disassembled, the engine needs to be placed on the assembly vehicle. After the engine is disassembled, the power turbine unit, the accessory drive unit, and the hot end unit are decomposed to obtain the cold end unit. The compressor rotor assembly in the cold end unit includes The 1st to 5th stage axial flow integral blade disc, centrifugal impeller, central tie rod, turbine connecting shaft, long bolts, No. 3 bearing and No. 4 bearing and other parts, among which, No. 3 bearing is a double inner half-ring angular contact ball bearing, and its Both the front and rear inner half rings are assembled on the front journal of the first-stage blade disc of the compressor, and their supporting points are located in the lubricating oil chamber of ...

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Abstract

The invention discloses a disassembling method of a cold-end unit body. According to the disassembling method of the cold-end unit body, a third bearing retainer is supported by an assembling bracketand an assembling base sequentially, thus, a third bearing can maintain the centering effect in the disassembling process, after a turbine connecting shaft is disassembled, a process shaft provided with a fourth bearing inner ring is used for replacing the turbine connecting shaft, therefore, the fourth bearing can maintain the centering effect, then a casing assembly in a diffuser, a compressor casing assembly, a compressor rotor assembly and a particle separator assembly are disassembled in sequence, and finally the third bearing retainer on the assembling base is taken down. According to the disassembling method of the cold-end unit body, the third bearing and the forth bearing maintain the centering effect in the entire disassembling process, the problems of rotor jamming, rotor and stator axial abrasion and falling-off of the third bearing retainer are avoided in the disassembling process, the reliability, stability and safety of the disassembling process are improved, and the scientific research and production progresses are ensured.

Description

technical field [0001] The invention relates to the technical field of engine disassembly, in particular to a method for disassembling a cold-end unit body. Background technique [0002] The cold end unit body of the turboshaft engine is composed of a particle separator assembly, a compressor casing assembly, a diffuser middle casing assembly and a compressor rotor assembly. Particle separator assembly and compressor casing assembly, compressor casing assembly and compressor rotor upper impeller casing, impeller casing and diffuser middle casing assembly are all positioned and bolted to form the No. 3 compressor rotor. , No. 4 bearing fulcrum. Although this connection method of precise seam positioning increases the installation accuracy of the No. 3 and No. 4 fulcrums of the compressor rotor, it also increases the difficulty of disassembly due to factors such as seam deformation after the engine test run, and increases the axial speed of the rotor and stator. Risk of grin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/00
CPCB23P19/00
Inventor 秦健瞿品祥张静董云龙孔勇
Owner CHINA HANGFA SOUTH IND CO LTD
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