Rotary Compressor Oil Paddle Twist for Leak-Free Lubrication
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Solution Overview
Problem
In rotary compressors, the oil paddle's single-direction twist leads to unintentional oil leakage through the gas hole during startup, affecting lubrication and sealing efficiency.
Innovation Solution
The oil paddle is designed with upper and lower regions twisted in different directions, increasing the oil supply rate by using a first region twisted opposite to the rotation direction to raise oil and a second region twisted in the same direction to lower oil, preventing leakage through the gas hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the oil paddle is twisted in one direction to raise oil, then the oil supply rate increases, but oil leaks through the gas hole unintentionally
Solution Approach 1:
The oil paddle is segmented into two distinct regions: a lower region twisted in a first direction to raise oil, and an upper region twisted in a second direction (opposite to the first) to control oil flow. This segmentation allows each region to perform its specific function independently, achieving both high oil supply rate and prevention of oil leakage through the gas hole.
Solution Approach 2:
Different regions of the oil paddle are given different twist directions to create local quality variations. The lower region has a first twist direction optimized for raising oil, while the upper region has a second twist direction optimized for controlling oil discharge. This local differentiation resolves the contradiction between maximizing oil supply and preventing unwanted leakage.
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 design enhances oil supply rate and sealing performance, improving cooling efficiency and reducing costs by minimizing oil leakage and enhancing lubrication within the compressor.
Implementation Method 1
a first region twisted in a second direction opposite to the first direction to raise the oil
Implementation Method 2
a second region located above the first region and twisted in the first direction to lower the oil
Implementation Method 3
an oil channel space formed in the rotary shaft in a longitudinal direction
Data Source
AI summary
A rotary compressor includes a rotary shaft rotating in a first direction and defining each of an oil channel along which oil moves, an oil hole corresponding to a cylinder and a gas hole above the cylinder, and an oil paddle rotating in the first rotation direction together with the rotary shaft, the oil paddle including a first length region twisted in a second rotation direction opposite to the first rotation direction, and a second length region twisted in the first rotation direction, where rotation of the rotary shaft in the first rotation direction includes the first length region of the oil paddle transferring the oil along the oil channel and toward the gas hole, together with the second length region of the rotary shaft transferring the oil along the oil channel and away from the gas discharge hole.