The commonly used mechanical pumps include fixed plate type, rotary plate type, and slide valve type, with the most commonly used being rotary plate vacuum pump (referred to as rotary plate pump), which is an oil sealed mechanical vacuum pump. Rotary vane mechanical pumps can be used independently or as pre pumping pumps for other high vacuum pumps or ultra-high vacuum Črpalke . Lahko se uporabi za odstranjevanje suhih plinov iz vakuumskih zaprtih zabojnikov in z nameščenim plinom lahko odstrani tudi določeno količino kondenziranih plinov ., vendar ni primerno za pridobivanje plinov z visoko vsebnostjo kisika, prahu, ki se nahajajo na črpalki, ki so v komentarju, ki so v komentarju, ki so v komentarju, ki so v komentarju, ki so v komentarju, ki so v sortalu, ki so v komentarju, ki so v komentarju, ki so v komentarju, ki so v sortalu, ki so v komentarju, ki so v komentarju. najotenzivna vakuumska oprema v vakuumski tehnologiji .
Rotary vane mechanical pumps are mostly small and medium-sized pumps, which have two types: single-stage pumps and two-stage pumps. A two-stage pump is a structure that connects two single-stage pumps in series. The difference between single-stage and two-stage pumps is that two-stage pumps can achieve higher vacuum levels.
In a two-stage pump, when there are unequal chambers between the low vacuum stage and the high vacuum stage, an auxiliary exhaust valve needs to be installed. The purpose of setting up an auxiliary exhaust valve is to start working when the gas compressed by the high vacuum stage reaches the exhaust pressure when the inlet pressure is high, and some gas is discharged from it, while the remaining gas is drawn away by the low vacuum stage. When the inlet pressure of the mechanical pump decreases, the exhaust volume of the auxiliary exhaust valve will also decrease, eventually reaching closure. During the entire pumping process, when the partial pressure of condensable gas exceeds the pump temperature and reaches the saturation vapor pressure, the condensable gas will condense and mix with the pump oil. Z delovanjem črpalke in kroženjem olja črpalke se bo ob vrnitvi na visok vakuumski konec . ponovno izhlapela v hlapi
Nastavitev plinskega balastnega ventila lahko učinkovito prepreči kondenzacijo kondenzacijskih plinov . med postopkom stiskanja črpalke plinski balast meša trajni suhi plin v stisnjeni plin skozi plin balasto exhaust valve to discharge both condensable and dry gases simultaneously. Under normal circumstances, oil sealed mechanical pumps are equipped with pneumatic valves, and their use can be found in the technical manual of the oil sealed mechanical vacuum pump. The disadvantage of this pump is that it is easy to return oil and spray oil. To overcome these disadvantages, Proizvajalec ponuja tudi dodatke, kot so molekularni sitovi, zbiralci oljnih mest, filtri za prah in oljni filtri .