密封基础知识(基本结构).ppt

文档介绍：rotating seal unit
two flat sliding surfaces, which maintain a close running clearance while separated by a fluid film
两个光滑平面之间维持着一个由流体膜隔开的微小间隙
stationary seal unit
What is a mechanical seal?什么是机械密封？
1
Desired Features of a Seal机械密封必须有的特征
Long-life 很长的寿命
Easy maintenance 容易检修
Low cost 低成本
Small axial clearance 小的轴向间隙
Self adjusting 自调节
Shaft
Movement
轴的运动
Basic Mechanical Seal基础机械密封
Loose ring set screwed to the shaft
把一个有间隙的环用顶丝固定在轴上
1
3
Basic Mechanical Seal基础机械密封
O-ring prevents leakage through the bore
Wear here will create leakage
这里的磨损将导致泄漏
2
4
Basic Mechanical Seal基础机械密封
Spring ensures automatic adjustment
弹簧确保自动调整
Heat generated here
此处生热
Leak path
Large component
大零件
3
5
Basic Mechanical Seal基础机械密封
Recirculation
for cooling
Gasket or O-ring
垫片或者O型圈
Primary Seal
主密封
Secondary Seal
二次密封
Tertiary Seal
三次密封
4
6
Basic Mechanical Seal基础机械密封
Seat or Mating Ring
Face or Primary Ring
Spring or Spring Force
5
7
Basic Mechanical Seal基础机械密封
Gasket or O-ring
Primary Seal
Secondary Seal
Tertiary Seal
SEAT
Recirculation
for cooling
SPRING OR
SPRING FORCE
8
O-Ring O型圈
Shaft轴
Mating Ring
配合环
Primary Ring补偿环
Snap Ring卡环
Anti-X Ring 挡环
O-Ring O型圈
Disk推环
Springs弹簧
Retainer传动套
Set Screw定位螺丝
An Example of a Complete Seal一个完整密封的例子
Simply put, a mechanical seal is:简单的说,机械密封就是:
1. A wearable, stationary, primary sealing element
一个耐磨,静止的密封件
2. A wearable, rotating, primary sealing element
一个耐磨,旋转的密封件
3. A secondary sealing element
二次密封
4. A mechanical loading device to press primary sealing elements 1 and 2 against one another, and
使件1和件2相互贴合的机械装置
5. Auxiliary components to complete seal
使密封更加完善的辅助件