Mechanical Seal Basic Sealing Points (Leakage Points)
2024-11-12
Mechanical Seal Basic Sealing Points (Leakage Points)
Mechanical seals generally have four basic sealing points (leakage points), as shown in the figure A, B, C, D.
A is a dynamic seal in which the end faces of the rotor 3 and the stator 7 are attached to each other and slide relative to each other. It is the main seal in the mechanical seal device and is also the key to determining the performance and life of the mechanical seal. Therefore, the processing requirements for the sealing end face are very high. At the same time, in order to maintain the necessary lubricating film between the sealing end faces, the unit area pressure on the end face must be strictly controlled. If the pressure is too high, it is not easy to form a stable lubricating film, which will accelerate the wear of the end face; if the pressure is too low, the leakage will increase. Therefore, in order to obtain good sealing performance and sufficient life, it is necessary to ensure that the unit area pressure value of the end face is in the most appropriate range.
B is the seal between the stator 7 and the end cover 4;
C is the seal between the rotor 3 and the matching the shaft (or sleeve) 9. Because it can move axially with the compensation ring and play a sealing role, it is also called a secondary seal;
D is the seal between end cover 4 and pump body
B, C, and D are static seals, generally sealed with gaskets such as O-shaped and V-shaped sealing rings, which are not easy to leak.
机械密封基本密封点（泄漏点）
A是旋转环与静止环的端面彼此贴合作相对滑动的动密封，它是机械密封装置中的主密封，也是决定机械密封性能和寿命的关键。因此，对密封端面的加工要求很高，同时为了使密封端面间保持必要的润滑液膜，必须严格控制端面上的单位面积压力，压力过大，不易形成稳定的润滑液膜，会加速端面的磨损；压力过小，泄漏量增加。所以，要获得良好的密封性能又有足够寿命，一定要保证端面单位面积压力值在最适当的范围。
B为静环7与压盖4端面之间的密封；
C处为动环3与轴（或轴套）9配合面之间的密封，因能随补偿环轴向移动并起密封作用，所以又称副密封；
D处为压盖与泵壳端面之间的密封。
B、C、D三处是静止密封，一般采用O形、V形密封圈等垫圈密封，不易泄漏。
A是旋转环与静止环的端面彼此贴合作相对滑动的动密封，它是机械密封装置中的主密封，也是决定机械密封性能和寿命的关键。因此，对密封端面的加工要求很高，同时为了使密封端面间保持必要的润滑液膜，必须严格控制端面上的单位面积压力，压力过大，不易形成稳定的润滑液膜，会加速端面的磨损；压力过小，泄漏量增加。所以，要获得良好的密封性能又有足够寿命，一定要保证端面单位面积压力值在最适当的范围。
B为静环7与压盖4端面之间的密封；
C处为动环3与轴（或轴套）9配合面之间的密封，因能随补偿环轴向移动并起密封作用，所以又称副密封；
D处为压盖与泵壳端面之间的密封。
B、C、D三处是静止密封，一般采用O形、V形密封圈等垫圈密封，不易泄漏。
For more information about mechanical seals or assistance with your specific requirements, feel free to contact us. Our team of experts is here to help you find the perfect sealing solution for your needs.
如需有关机械密封的更多信息或满足您的特定要求，请随时联系我们。我们的专家团队将帮助您找到适合您需求的完美密封解决方案。
如需有关机械密封的更多信息或满足您的特定要求，请随时联系我们。我们的专家团队将帮助您找到适合您需求的完美密封解决方案。
Mechanical seals Features & Benefits & Industries
How a Mechanical Seal Works
