Installation and use of magnetic fluid seal assembly of magnetron vacuum coating machine
Installation and use of the magnetic fluid seal assembly of the magnetron vacuum coating machine: When installing and using the seal assembly, pay attention to the coaxiality requirements of the installed seal assembly and the shaft, the amount of magnetic fluid injection should be appropriate, and the assembly should be carried out before installation. Necessary vacuum cleaning treatment, check when sealing components leak:
1. Pay attention to the coaxiality requirements of the installed sealing component and the shaft, so as to ensure that the sealing gap has a small eccentricity.
2. The amount of magnetic fluid injected should be appropriate. Under the premise of ensuring that there is sufficient amount in the sealing gaps at all levels, excessive magnetic fluid should not be injected to prevent excess magnetic fluid from entering the vacuum chamber during evacuation and polluting the vacuum chamber.
3. Before installation, the components should be vacuum cleaned, and attention should be paid to prevent cleaning agents such as acetone and ethanol from dripping into the magnetic fluid seal assembly to avoid failure of the seal assembly.
4. If leaks of the sealing components are found, the following points should be found:
a. Whether the magnetic fluid is invalid;
b. Whether the connecting flange and the static sealing ring in the assembly are damaged;
c. Whether the tooth profile of the pole tooth contact with the rotating shaft produces dry friction;
d. Whether the shaft and the sealing assembly are improperly connected, resulting in coaxial displacement;
e. Whether the permanent magnet is demagnetized, etc.
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