Mechanical seal installation and technical requirements

The mechanical seal is a precise component, and the manufacturing accuracy and installation accuracy of the equipment are very strict. Improper assembly will affect the sealing performance. Correct installation must pay attention to the following points:

1. Requirements for the reaction kettle and the matching part of the mechanical seal: ①The shaft manufacturing tolerance of the mechanical seal installation is h8, indicating that the roughness is 1.6um2. The end of the shaft or the shaft sleeve where the mechanical seal is installed should be chamfered and polished. as the picture shows:

③The axial movement of the stirring shaft is less than 0.3mm, and the axial swing is less than, Vd /100 (d is the shaft diameter) mm (measured at the mechanical seal):

④The vertical angle between the stirring shaft and the flange of the kettle mouth is not more than 0.5mm, and the concentricity between the stirring shaft and the flange of the kettle mouth is not more than 0.5mm;

⑤The service life of the mechanical seal is based on the premise that the equipment meets the above conditions, the operating conditions of the equipment meet the operating parameters of the mechanical seal, and the daily maintenance is correct.

2. Installation requirements for mechanical seals for kettles ① Design requirements for symbols and drawings of each part in the component. 2. There should be a 3-5mm gap between the dynamic ring seal of the balanced mechanical seal and the dynamic ring seal cavity. ③ When installing the static ring, the end face needs to be aligned with a dry sub-table and ensure that the front face of the end face is perpendicular to the axis, allowing 0.05mm.

④The amount of compression of the spring is allowed to have an error of ±0.2mm according to the requirements of the drawing.

5 After installation, loosen the positioning card nut before driving.

⑥ After the mechanical seal is installed, there should be more than 24 hours of empty running-in operation.

⑦In the absence of reliable protective measures, the mechanical seal of the kettle is prohibited to be assembled on the reactor for transportation.