Rotary vane vacuum pump is a basic equipment used to remove the gas in a specific sealed container, so that the container can obtain a certain vacuum. Due to the high development of modern science and technology, the application of rotary vane vacuum pump has spread throughout various scientific fields and various enterprises and institutions. It can be used for scientific research, production and teaching in scientific research institutions, colleges and universities, industrial and mining enterprises such as metallurgy, chemical industry, light industry, petroleum, medical treatment, pharmacy, printing and dyeing, electrical appliances, electric vacuum, semiconductor, food, atomic energy, textile, etc. And widely used in oil presses.