Scroll Compressor Ring-Gap Lubrication to Reduce Contact Noise
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Solution Overview
Problem
Existing scroll compressors experience noise generation due to contact between the recessed portion and the ring in the rotation prevention mechanism, which is attributed to the reduced gap between the inner and outer peripheral surfaces.
Innovation Solution
A compressor design with a gap of 0.1 mm to 0.6 mm between the inner peripheral surface of the recessed portion and the outer peripheral surface of the ring, combined with a lubricant supply unit to facilitate lubrication and reduce impact noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the inner peripheral surface of the recessed portion and the outer peripheral surface of the ring is reduced, then the Hertz stress is reduced and damage to the recessed portion is suppressed, but noise is generated due to collision between the ring and the recessed portion
Solution Approach 1:
The patent optimizes the gap parameter between the ring and recessed portion to a specific range (0.01mm to 0.05mm) to simultaneously reduce Hertz stress and prevent collision noise, resolving the contradiction through precise parameter control
2Object-generated harmful factors
If the gap between the inner peripheral surface of the recessed portion and the outer peripheral surface of the ring is increased, then noise caused by collision is reduced, but the Hertz stress increases leading to damage of the recessed portion
Solution Approach 1:
The patent determines the optimal gap range (0.01mm to 0.05mm) by analyzing the relationship between gap size, Hertz stress, and collision occurrence, achieving a balance that prevents both noise and damage
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively suppresses noise caused by contact between the recessed portion and the ring, enhancing operational silence and reducing mechanical wear.
Implementation Method 1
a lubricant supply unit that supplies a lubricant to the rotation prevention mechanism
Data Source
AI summary
Provided is an electric compressor comprising: a housing; a fixed scroll that is housed in the housing and fixed on the housing side; a turning scroll that meshes with the fixed scroll and turns with respect to the fixed scroll; an autorotation inhibiting mechanism that inhibits autorotation of the turning scroll; and a lubricant supply unit that supplies a lubricant to the autorotation inhibiting mechanism. The autorotation inhibiting mechanism has: a ring hole which is formed in the turning scroll; a ring which is disposed in the ring hole, and the outer circumferential surface of which faces the inner circumferential surface of the ring hole; and a pin which is provided to the housing and which engages with the inner circumferential surface of the ring. A gap formed between the inner circumferential surface of the ring hole and the outer circumferential surface of the ring is 0.1-0.6 mm.