Issue with change in dust cover material?
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The current material is copper; it often comes out when rotating, and the set screw cannot hold it in place. Someone suggested changing it to tetrafluorographite; I’m not sure if that’s possible
It depends on the operating temperature of the material; it’s crucial to determine whether perfluorographite can withstand temperatures above 200 degrees. If the mechanical seal leaks, the fluid that escapes can directly enter the bearing box. Suggestion: Do not make any changes; it’s best to use copper. It’s more reasonable to machine a few set screws on a lathe
It can be modified; our company has already succeeded in making such technical improvements, starting with high-temperature pumps, and they can be reused repeatedly. The shaft and the fitting are connected by an interference fit, but care must be taken regarding the amount of interference; there are also many minor details related to machining that are difficult to control.
Reply to 3# Man Tianyun: We submitted the application in accordance with the regulations, but the relevant personnel were too afraid to sign it – some were worried about static electricity, some feared that high friction temperatures would melt the new material, and others were concerned about fires! They said: What’s going to happen if we make changes?
The leaders of the original poster are the same; don’t they understand that the vast majority of devices we use today have been improved bit by bit, over time? Speechless! Actually, the original poster can take measurements; as long as the cooling water is functioning properly, the temperature of the shaft at the non-driving end of the high-temperature pump will not exceed 70 degrees Celsius. If there is no friction due to proper control of the clearance, how could static electricity be generated?