Mechanical seal
Thread Content
Mechanical seals achieve sealing in dynamic operation by utilizing the pressure between the rotating and stationary rings; what is then the principle of sealing in static operation? Can a static sealing effect be achieved merely by compressing the sealing surface between the rotating and stationary rings?
I’m not quite sure; does \"static\" refer to the state of a device when it’s not in operation? Are there no sealing issues when the moving equipment is not in operation?
It is recommended to buy a book on sealing; the principle behind it is quite simple.
It’s still the spring that presses the cover shut; in fact, it’s the same whether it’s in motion or at rest. It’s just that the rotating ring surface spins when it moves.
That’s right, it mainly relies on adjusting the spring preload
It’s possible; it relies on elastic pressure to ensure good dynamic and static sealing
Well, yes. Dynamic and static refer to the operating and non-operating states of a device.
The sealing surfaces are made of materials with very high hardness. Can the sealing effect be achieved merely by using the preloading force of springs to cause deformation in those sealing surfaces? The mechanical seal of the pump on site is subjected to a water pressure of over 10 meters
Looking at the design of the seal, it is a balanced type of mechanical seal; the pressure exerted by the medium on both sides of the moving ring is equal. It can also be tightened using compensating elements (high precision is required for the flatness of the sealing surface)
The sealing surface is made of a material with very high hardness, but this also depends on the application for which the mechanical seal is intended and its specific model. The spring provides the pre-tightening force for the mechanical seal; without this pre-tightening force, no matter how good the sealing surface is, it will not be able to provide a proper seal!