Scroll Compressor Modular Assembly Positioning
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Solution Overview
Problem
The existing scroll-type compressors face difficulties in separating and connecting the compression mechanism unit and motor unit without disassembly, which complicates assembly and positioning of the eccentric and non-eccentric parts, leading to poor assembling performance.
Innovation Solution
A scroll-type fluid machine design where the motor unit and main body unit are fastened using separate fastening and positioning members, with the positioning member having a specific dimensional relationship to facilitate easy alignment and connection without disassembly, and the motor casing and main body casing include positioning holes for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the bearing fitting hole is provided in the compression mechanism unit, then the axial centers of compression mechanism unit and motor can be determined by fitting between bearing fitting hole and main bearing, but it is not easy to separate and connect the compression mechanism unit and motor
Solution Approach 1:
The patent divides the scroll compressor into separate modules: compression mechanism unit and motor unit, connected via a coupling mechanism. This segmentation allows independent assembly and disassembly of each unit while maintaining precise positioning through the coupling interface, resolving the contradiction between assembly ease and positioning precision.
Solution Approach 2:
The patent introduces a coupling mechanism as an intermediary component between the compression mechanism unit and motor unit. This coupling serves as a mediator that enables easy connection and separation while ensuring accurate alignment of axial centers, thus resolving the contradiction between ease of assembly and positioning precision.
2Ease of operation
If the bearing fitting hole is provided in the motor frame, then the compression mechanism unit and motor can be easily separated and connected, but it is necessary to position the compression mechanism unit and motor with uniquely fixed positions which deteriorates the assembling performance
Solution Approach 1:
The patent employs a dynamic coupling mechanism that allows for adjustable positioning between the compression mechanism unit and motor unit. The coupling can be positioned at multiple locations along the drive shaft, enabling flexible assembly while maintaining precise alignment, thus resolving the contradiction between assembly ease and positioning precision.
3Ease of operation
If separate fastening and positioning members are used, then the motor unit and main body unit can be easily separated and connected, but the device complexity increases
Solution Approach 1:
The patent combines the fastening function and positioning function into an integrated coupling mechanism. This unified structure performs both functions simultaneously, reducing the number of separate components and simplifying the overall device structure while maintaining ease of assembly and disassembly.
Data Source
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AI summary
The objective of the present invention is to provide a scroll-type fluid machine, and a method for assembling this scroll-type fluid machine, with which an eccentric shaft and a non-eccentric part can be positioned easily in the same step, while allowing a main body unit and a motor unit to be separated and connected without being disassembled. To achieve this objective, this scroll-type fluid machine is equipped with a main body unit having a main body casing, a fixed scroll, and an orbiting scroll, and a motor unit having a drive shaft for driving the main body unit, and a motor casing, wherein the drive shaft protrudes from the motor casing and is attached to a slewing bearing of the main body unit, positioning holes into which a positioning member is inserted are formed on their respective opposing mating surfaces of the motor casing and the main body casing, and the dimensional difference between main-body-casing-side insertion opening of the positioning hole and the motor-casing-side end surface of the slewing bearing in the axial direction is less than the dimensional difference between the main-body-unit-side tip ends of the drive shaft and the positioning member in the axial direction.