Compressor Welding Point Arrangement for Vibration Reduction
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Solution Overview
Problem
Conventional compressors experience significant vibrations in the suction tube and accumulator due to the alignment of welding points coinciding with the natural vibration modes of the suction tube, leading to transmission of motor vibrations and increased vibration even without an accumulator connected.
Innovation Solution
The compressor design includes a closed container and compression element welded at three or more points, with the welding points arranged such that their directions do not coincide with the natural vibration modes of the suction tube, reducing vibrations and increasing the rigidity of the container through evenly distributed welding points and concentrated windings in the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If welding points are arranged along the central axis or perpendicular to it, then manufacturing is simplified, but the suction tube and accumulator experience significant vibrations due to resonance with motor vibration frequencies
Solution Approach 1:
The patent applies asymmetry by arranging welding points at specific angular positions that are neither symmetric along the central axis nor perpendicular to it. The welding points are positioned at angles that avoid resonance with the motor's vibration frequencies, specifically avoiding the first direction (central axis) and second direction (perpendicular to central axis). This asymmetric arrangement prevents the suction tube from vibrating resonantly while maintaining manufacturability.
2Object-affected harmful factors
If welding points are positioned to avoid natural vibration modes, then vibration is reduced, but manufacturing complexity increases due to precise angular positioning requirements
Solution Approach 1:
The patent applies parameter changes by specifying precise angular parameters for welding point positions. The welding points are arranged at specific angles relative to the central axis, creating a defined geometric configuration that avoids resonance. This parameter-based approach provides a clear manufacturing specification that reduces vibration while maintaining reasonable manufacturing complexity through standardized angular measurements.
Data Source
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AI summary
In a compressor, a closed container (1) and a compression element (2) are welded together at six welding points (8). A suction tube (11) for sucking refrigerant gas is attached to the closed container (1). A first direction D1 and a second direction D2 that are associated with a natural vibration mode of the suction tube (11) do not coincide with a direction in which any two of the welding points (8) are aligned. Accordingly, vibration of the suction tube (11) can be reduced by arrangement of the welding points (8) even if vibration of a motor is transmitted to the compression element (2).