往複真空泵主要部件為泵缸、活塞、活塞杆、吸入閥和排出閥，見圖1。
吸xi入ru閥fa和he排pai出chu閥fa均jun為wei單dan向xiang閥fa。當dang活huo塞sai自zi左zuo向xiang右you移yi動dong時shi，工gong作zuo室shi容rong積ji增zeng大da，形xing成cheng低di壓ya，此ci時shi排pai出chu閥fa在zai壓ya出chu管guan內nei液ye體ti的de壓ya力li下xia關guan閉bi而er吸xi入ru閥fa則ze被bei泵beng外wai液ye體ti推tui開kai，從cong而er將jiang貯zhu液ye池chi內nei的de液ye體ti經jing吸xi入ru管guan吸xi入ru泵beng缸gang內nei。當dang活huo塞sai移yi到dao最zui右you端duan時shi，工gong作zuo室shi容rong積ji最zui大da，吸xi入ru的de液ye體ti盆pen也ye最zui多duo。此ci後hou活huo塞sai便bian改gai為wei向xiang左zuo移yi動dong，由you於yu泵beng缸gang內nei液ye體ti受shou擠ji壓ya而er使shi其qi壓ya強qiang增zeng大da，致zhi使shi吸xi入ru閥fa關guan閉bi而er排pai出chu閥fa打da開kai，從cong而er將jiang泵beng缸gang內nei液ye體ti排pai出chu。活huo塞sai往wang複fu一yi次ci，則ze吸xi入ru和he排pai出chu液ye體ti各ge一yi次ci，因yin此ci隻zhi要yao活huo塞sai不bu斷duan地di作zuo往wang複fu運yun動dong，就jiu可ke不bu斷duan地di將jiang液ye體ti交jiao替ti地di吸xi入ru與yu排pai出chu，達da到dao輸shu送song液ye體ti的de目mu的de。 |
