Introduction to relevant knowledge of mechanical seals for kettles

The mechanical seal for the kettle is an important component of the current and multi-equipment, which can greatly help the equipment to improve the sealing performance, but many users do not understand the relevant knowledge of the equipment, so the definition, classification, and installation instructions of the equipment will be described in detail next. introduction.

1. Definition:

The mechanical seal for the kettle is an ideal way to solve the sealing of the stirring shaft. According to the logarithm of the sealing surface, there are single-end mechanical seals and double-end mechanical seals. Double-end mechanical seals are generally equipped with a balanced circulation system, which can be used in occasions with stricter sealing requirements such as flammable, explosive, toxic and corrosive, and high vacuum. The sealing structure is an external flushing structure. The flushing liquid can be clean water or industrial reuse water. The pressure of the flushing liquid is lower than the pressure of the sealing chamber. The flushing liquid is input at the upper end of the auxiliary sleeve and output at the lower end of the auxiliary sleeve for recycling. The seal plays the role of cooling and flushing. The auxiliary devices of the mechanical seal include a thermostat, a balance tank (isolated fluid container), a forced circulation balance system, etc.

2. Classification:

1. Single-end single-spring unbalanced seal

2. Single-end multi-spring unbalanced seal

3. Single-end single-spring balanced seal

4. Single-end multi-spring balanced seal

5. Double-end multi-spring unbalanced seal

6. Double-end multi-spring balanced seal

3. Installation instructions:

1. Check whether the model and specification of the mechanical seal to be installed are correct.

2. Check whether the dimensional accuracy, geometric accuracy and mutual relationship between the host and the installation of the mechanical seal meet the technical requirements. There are mainly the following aspects:

(1) The radial runout tolerance of the shaft (or sleeve) where the mechanical seal is installed, the surface finish of the shaft (or sleeve) and the tolerance of the outer diameter.

(2) Perpendicularity tolerance between the sealing chamber and the gland combined with the positioning end facing the center line of the shaft (or sleeve).

(3) The end of the shaft (or sleeve) where the dynamic ring seal is installed, and the chamfering and smoothness of the end structure of the housing hole where the mechanical seal is installed.

(4) The axial displacement of the rotating shaft of the mechanical seal when it is working.

3. During the installation of the mechanical seal, it should be kept clean, and it is not allowed to hit the sealing element with tools to prevent damage and damage.

4. During installation, the surfaces of the dynamic and static rings should be coated with a layer of clean engine oil and turbine oil. The auxiliary sealing ring (including the moving ring sealing ring and the static ring sealing ring) also needs to be coated with a layer of clean engine oil or turbine oil before installation to ensure smooth installation.

5. Put the static ring sealing ring on the back of the static ring and put it into the sealing end cover. Be careful not to damage the end face of the static ring. Make sure that the end face of the static ring is perpendicular to the center line of the end cover, and pay attention to the anti-rotation groove on the back of the static ring The anti-rotation pins must be aligned but not touching.

6. The rotating part of the mechanical seal is fixed with the shaft by two fixing screws on the spring seat. When tightening the fixing screws, the working length of the spring must be guaranteed.

The above is the introduction of the definition, classification, and installation instructions of mechanical seals for kettles. According to the introduction, one can clearly understand the use of the product and the performance of related performances, so as to effectively extend and improve its use efficiency.