Compared with the hot air circulation drying equipment, the vacuum oil injection equipment has removed the hot air circulation system. Compared with the fire oil phase drying equipment, it has removed several systems related to fire oil. In terms of the number of mechanical equipment systems, it is, in principle, similar to that of ordinary vacuum drying. Therefore, the configuration is simple, which greatly facilitates operation and maintenance.
The high degree of automation is due to its clear process path, simple and straightforward operation, which is conducive to the automatic control of the entire drying process, and the reliability of automatic control is relatively high. Compared with the oil vapor drying equipment, the equipment investment is relatively low, which can save one third of the investment. It is an advanced equipment that most electrical manufacturers can accept. One should observe and record patiently to identify the faults.
When the evacuation time is the same but the vacuum degree is low, close the high-pressure valve. If the pointer of the vacuum gauge drops rapidly, it is mostly because the vacuum chamber is leaking. At this time, the leakage point should be found first. If the pointer of the vacuum gauge drops very slowly, it is mostly due to the insufficient pumping capacity of the vacuum unit. At this time, the focus can be placed on looking for problems with the vacuum pump and valves to see where there is a leakage or if the oil in the diffusion pump has been contaminated or oxidized, etc. Or the pre-stage pipeline is not well sealed, resulting in insufficient pump oil. Or there may be faults such as oil emulsification in the pump, oil leakage from the shaft seal, or damage to the valve plate.
The user has stored it for four years. After completing the routine cleaning work and connecting the pipelines in a conventional way to start evacuating, it still couldn't meet the factory standards. Everything was checked, but the vacuum rubber hose for gas supply was not inspected. At that time, it was thought that the vacuum rubber hose would not leak. The result was exactly the opposite. The problem lay with this vacuum rubber hose. Furthermore, whether the vacuum pump components are cleaned with gasoline or other solvents, installation must be carried out only after the gasoline or solvents have completely evaporated. If the vacuum pump oil is mixed with other oils, solvents, or water, it will damage its performance and affect the performance indicators of the vacuum pump.