Mechanical seal for kettle How to prevent leakage?
The mechanical seal for kettle is a device specially designed to prevent leakage of containers or media in containers. It consists of a rotating part and a stationary part, which are connected together by using one or more sealing rings or gaskets. The role of mechanical seal is to ensure that the medium in the container will not leak from the rotating shaft, and prevent external environmental substances from entering the container.
The mechanical seal adopts a design principle of pressure balance, which can work under the condition of asymmetric pressure on both sides of the container. It achieves the sealing effect through the cooperation of static seal and dynamic seal. The following details several key aspects of how mechanical seals prevent leakage.
First, the mechanical seal adopts the design of sealing ring. Sealing ring is an important part of mechanical seal, and its material is usually hard alloy material with high wear resistance and corrosion resistance. The shape and size of the sealing ring shall match the axial clearance and radial clearance of the vessel to ensure that it can closely contact the vessel wall. When the medium in the container generates pressure, the sealing ring will be compressed, thus forming an effective static seal layer to prevent medium leakage.
Secondly, the mechanical seal also adopts the design of sealing gasket. The sealing gasket is usually made of rubber or polytetrafluoroethylene and has good pressure resistance and corrosion resistance. The sealing gasket is installed at the fixed end, which can produce good dynamic sealing effect with the rotating end. When the sealing gasket is under the effect of medium pressure, it will closely fit the vessel wall to form an effective sealing layer to prevent medium leakage. At the same time, the thickness and material selection of the sealing gasket shall be determined according to the nature of the medium and working conditions to ensure the stability and reliability of the sealing effect.
Third, the mechanical seal is also equipped with a system for lubricating medium. In order to ensure the stability and life of mechanical seal, it is usually necessary to provide a certain amount of lubricating medium in the mechanical seal. The selection of lubricating medium shall be determined according to the nature and working conditions of the medium. Common lubricating medium includes lubricating oil, grease, etc. The lubricating medium is transported to the mechanical seal through the pipeline, forming a protective film, reducing friction and wear, improving the sealing effect and sealing life, and preventing medium leakage.
Fourth, the mechanical seal also has a pressure balance system. Under some high pressure conditions, the medium will produce great pressure, which will bring great pressure load to the mechanical seal. In order to reduce the influence of pressure on mechanical seal, it is necessary to set pressure balance system in the pressure balance chamber of mechanical seal. The pressure balance system usually consists of a pressure balance hole and a pressure balance ring. When the medium pressure acts on the mechanical seal, part of the medium will enter the pressure balance chamber. Through the pressure balance hole and pressure balance ring, the pressure inside and outside the chamber will be kept in balance, reducing the pressure load on the mechanical seal, thus improving the reliability and life of the seal.
