Hydrodynamic Analysis of Thrust Bearing for Scroll Compressor
Date Issued
2007
Date
2007
Author(s)
Liong, Siong-Hock
DOI
zh-TW
Abstract
Although scroll compressor was not commercialized until 1980’s, but its excellent efficiency and the advantage of little vibration and low noise made scroll compressor have the possibility to replace other types of compressor on the market.
There seems to exist a problem of over adhension on thrust bearing during operating. It causes the rise of input power, thus causes the efficiency to decrease. The compressor fails to work at last.
Noting that the broken thrust bearing presents a lot of pitting on the contact surfaces. When the compressor continues to operate the pitting phenomenon extends, thus causes surface fatigue. The pitting is caused by the boundary lubrication or even dry friction during high load operation.
This work establishes Reynolds equation for tilting pad thrust bearing and then applies finite difference method to analyze pressure distribution. The summation of the pressure distribution is thus the total supporting force.
Results show that the tilting pad thrust bearing with incline angle θ=tan-10.01 maximize the thrust bearing’s load capacity.
Subjects
渦卷壓縮機
止推軸承
雷諾方程式
潤滑
液動力
scroll compressor
thrust bearing
Reynolds equation
lubrication
hydrodynamic
Type
thesis
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