The following Vegetable Drying Machinet manufacturers will talk to you about common failures of the vacuum system of the freeze dryer.
Vacuum degree of vacuum system of freeze dryer is not high. Cause: The pump temperature is too high, which may be caused by scraping and abrasion of the valve plate or inner cavity of the pump, and displacement of the rotor axis causes single-sided abrasion. There are problems with the pump oil: the oil level is too low and the seal is not tight; Oil is yellow when contaminated. The oil level is normal, the oil circuit is blocked, and the pump chamber does not maintain an appropriate amount of oil. The pump itself leaks air: the sealing ring and the gasket of the air needle valve are damaged or not pressed tightly, and the exhaust valve piece is damaged, resulting in poor sealing. The air inlet filter is blocked. Methods: After the new assembly. Come on! Oil change; Check the oil inlet of oil circuit and oil valve. Change sealing ring or valve plate according to specific situation g. Remove and clean.
The motor of the vacuum system of the freeze dryer runs under load, and there are abnormal noises and noises in the operation of the pump, which makes it difficult to rotate. Cause: The pump temperature is too high, which may be caused by scraping and abrasion of the valve plate or inner cavity of the pump, and displacement of the rotor axis causes single-sided abrasion. The spring deforms or breaks, which makes the rotating plate produce impact sound due to uneven stress. The filter screen is damaged and the debris falls into the pump. Pollution in the pump chamber is severe and parts are rusted. The pump cavity shaft and shaft sleeve are tightly matched, resulting in lubrication. Methods: After the new assembly, G change the spring, remove the cleaning, oil change, new assembly, and oil circuit.
Oil leakage and injection in vacuum system of Freeze Dry Machine. Cause: The sealing ring of rotating shaft, oil window, oil drain hole and other parts is damaged or incorrectly assembled. Inlet pressure is too high. Too much oil results in oil injection. The oil screen under the exhaust cover is installed reversely, causing oil injection. Methods: g change the sealing ring or new assembly, try to reduce the oil intake, release some oil, new assembly.