Scroll Compressor Pin-and-Ring Mechanism Orbit Correction
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Solution Overview
Problem
The pin-and-ring type self rotation preventing mechanism in scroll compressors generates noise due to shock loads caused by changes in the orbit of the revolving scroll member, leading to reduced compression performance and increased gas leakage.
Innovation Solution
Incorporating an orbit correction part in the self rotation preventing mechanism, such as modifying the shape of the ring holes or rings, to reduce the maximum displacement and twist of the revolving scroll member, thereby smoothing the change in orbit and reducing shock loads on the pin and ring parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the maximum displacement R is set at a large value and the self rotation preventing pin location is offset, then the revolving radius variable can be included, but shock sound occurs due to orbit change and shock load on pins
Solution Approach 1:
The patent changes the geometric parameters of the pin-and-ring mechanism by setting the maximum displacement R at a large value and offsetting the pin location to accommodate the revolving radius variable, while simultaneously introducing an orbit correction part to modify the orbital path and reduce shock loads
Solution Approach 2:
The orbit correction part acts as an intermediary element that mediates between the pin-and-ring mechanism and the revolving scroll member, smoothing the orbital changes and reducing the shock loads transmitted to the pins and rings
2Adaptability or versatility
If the maximum displacement R is set at a large value and the self rotation preventing pin location is offset, then the revolving radius variable can be included, but excessive load operates on one of the self rotation preventing pins
Solution Approach 1:
The patent adjusts the geometric parameters including maximum displacement R and pin offset position to distribute the mechanical loads more evenly across multiple pins and rings during the compression cycle
Solution Approach 2:
The orbit correction part dynamically adjusts the orbital path of the revolving scroll member to prevent excessive displacement and load concentration on individual pins, allowing the system to adapt to varying operating conditions
3Reliability
If pins and rings are provided in plural places, then self rotation prevention is improved, but shock sound occurs due to pin and ring change
Solution Approach 1:
The patent divides the self rotation prevention function into multiple pin-and-ring pairs distributed at different locations, with each pair handling specific portions of the compression cycle, while the orbit correction part ensures smooth transitions between them
Solution Approach 2:
The orbit correction part dynamically smooths the orbital path to ensure continuous and smooth engagement between pins and rings, eliminating the shock sounds that occur during pin and ring changes while maintaining reliable self rotation prevention
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
This solution effectively reduces noise levels by up to Δ3 dB(A) and improves compression performance by minimizing gas leakage and self-rotation of the revolving scroll member, while maintaining a compact and cost-effective design.
Implementation Method 1
The driven crank mechanism uses centrifugal force, compression reaction force of a gas or the like to drive the revolving scroll member to perform revolutionary turning
Implementation Method 2
a pin-and-ring type self rotation preventing mechanism for preventing self rotation of the revolving scroll member
Data Source
Figure 1
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AI summary
To provide a scroll compressor capable of reducing a noise occurring in a pin-and-ring type self rotation preventing mechanism and improving compression performance. In a scroll compressor comprising: a fixed scroll member (25) and a revolving scroll member (27); a driven crank mechanism (55) for driving the revolving scroll member (27) to revolutionary turn; and a pin-and-ring type self rotation preventing mechanism (33) provided in plural places for preventing self rotation of a revolving scroll member (27), at least one of the self rotation preventing pin (63), the self rotation preventing ring (65) and the self rotation preventing ring hole (27D), which form the pin-and-ring type self rotation preventing mechanism (33), being provided with an orbit correction part (67) for reducing a maximum displacement R in a direction of self rotation of the revolving scroll member to smooth a change of an orbit of the revolving scroll member in changing a pin and a ring in a section of prevention of self rotation by means of a corresponding pin and ring part.