Basic Mechanical Seals 密封基础知识 JC Tianjin Training
© 2001 John Crane EAA
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What is a mechanical seal?
什么是机械密封？ two flat sliding surfaces, which maintain a close running clearance while separated by a fluid film rotating seal unit
stationary seal unitpgm_430mei
2 2氧化钢
Desired Features of a Seal 机械密封必须有的特征
Small axial clearance 小的轴向间隙 Self adjusting 自调节
Shaft Movement 轴的运动
Long-life 很长的寿命 Easy maintenance 容易检修 Low cost 低成本
Basic Mechanical Seal
基础机械密封
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Loose ring set screwed to the shaft
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Basic Mechanical Seal
基础机械密封
2神仙树学名叫双翅六道木
工程仿真
Wear here will create leakage
O-ring prevents leakage through the bore
5 5机
Basic Mechanical Seal
基础机械密封
rbd-508Heat generated here 此处生热 Leak path
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Large component 大零件
Spring ensures automatic adjustment 弹簧确保自动调整
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