威格士柱塞泵柱塞往復(fù)運動總行程L是不變的，由凸輪的升程決定。柱塞每循環(huán)的供油量大小取決于供油行程,供油行程不受凸輪軸控制是可變的。供油開始時刻不隨供油行程的變化而變化。轉(zhuǎn)動柱塞可改變供油終了時刻，從而改變供油量。柱塞泵工作時，在噴油泵凸輪軸上的凸輪與柱塞彈簧的作用下，迫使柱塞作上、下往復(fù)運動，從而完成泵油任務(wù)，泵油過程可分為以下三個階段。

1、進(jìn)油過程

當(dāng)凸輪的凸起部分轉(zhuǎn)過去后，在彈簧力的作用下，柱塞向下運動，柱塞上部空間（稱為泵油室）產(chǎn)生真空度，當(dāng)柱塞上端面把柱塞套上的進(jìn)油孔打開后，充滿在油泵上體油道內(nèi)的柴油經(jīng)油孔進(jìn)入泵油室，柱塞運動到下止點，進(jìn)油結(jié)束。

2、供油過程

當(dāng)凸輪軸轉(zhuǎn)到凸輪的凸起部分頂起滾輪體時，柱塞彈簧被壓縮，柱塞向上運動，燃油受壓，一部分燃油經(jīng)油孔流回噴油泵上體油腔。當(dāng)柱塞頂面遮住套筒上進(jìn)油孔的上緣時，由于柱塞和套筒的配合間隙很小（0.0015-0.0025mm）使柱塞頂部的泵油室成為一個密封油腔，柱塞繼續(xù)上升，泵油室內(nèi)的油壓迅速升高，泵油壓力>出油閥彈簧力+高壓油管剩余壓力時，推開出油閥，高壓柴油經(jīng)出油閥進(jìn)入高壓油管，通過噴油器噴入燃燒室。

3、回油過程

威格士柱塞向上供油，當(dāng)上行到柱塞上的斜槽（停供邊）與套筒上的回油孔相通時，泵油室低壓油路便與柱塞頭部的中孔和徑向孔及斜槽溝通，油壓驟然下降，出油閥在彈簧力的作用下迅速關(guān)閉，停止供油。此后柱塞還要上行，當(dāng)凸輪的凸起部分轉(zhuǎn)過去后，在彈簧的作用下，柱塞又下行。此時便開始了下一個循環(huán)。

威格士柱塞泵是往復(fù)泵的一種，屬于體積泵，其柱塞靠泵軸的偏心轉(zhuǎn)動驅(qū)動，往復(fù)運動，其吸入和排出閥都是單向閥。當(dāng)柱塞外拉時，工作室內(nèi)壓力降低，出口閥關(guān)閉，低于進(jìn)口壓力時，進(jìn)口閥打開，液體進(jìn)入；柱塞內(nèi)推時，工作室壓力升高，進(jìn)口閥關(guān)閉，高于出口壓力時，出口閥打開，液體排出。帶滑靴結(jié)構(gòu)的軸向柱塞泵是目前使用zui廣泛的軸向柱塞泵，安放在缸體中的柱塞通過滑靴與斜盤相接觸，當(dāng)傳動軸帶動缸體旋轉(zhuǎn)時，斜盤將柱塞從缸體中拉出或推回，完成吸排油過程。柱塞與缸孔組成的工作容腔中的油液通過配油盤分別與泵的吸、排油腔相通。變量機(jī)構(gòu)用來改變斜盤的傾角，通過調(diào)節(jié)斜盤的傾角可改變泵的排量。

威格士柱塞泵系列：

   PVQ系列：PVQ5、PVQ10、PVQ15、PVQ20、PVQ25、PVQ29、PVQ45

   PVB系列：PVB5、PVB10、PVB15、PVB20、PVB25、PVB29、PVB45

   PVH系列：PVH57、PVH74、PVH98、PVH131、PVH141

   PVM系列：PVM018/020、PVM040/050、PVM057/063、PVM074/081、PVM098/106、PVM131/141

   PVXS（PF）系列：PVXS066、PVXS090、PVXS130、PVXS180、PVXS250等。

威格士PVH柱塞泵：VICKERS PISTON PUMP：

PVH074R01AA10A25000000100100010A   PVH74C-RF-1S-10-C25-31       VICKERS PISTON PUMP

PVH074R01AA10B25200000100100010A   PVH74C-RF-1S-10-C25V-31      VICKERS PISTON PUMP

PVH074R01AA10A250000001001AA010A   PVH74C-RF-1S-11-C25-31       VICKERS PISTON PUMP

PVH074R01AA10B252000001001AA010A   PVH74C-RF-1S-11-C25V-31      VICKERS PISTON PUMP

PVH074R02AA10A25000000100100010A   PVH74C-RF-2S-10-C25-31       VICKERS PISTON PUMP

PVH074R02AA10B25200000100100010A   PVH74C-RF-2S-10-C25V-31      VICKERS PISTON PUMP

PVH074R02AA10B252000001001AA010A   PVH74C-RF-2S-11-C25V-31      VICKERS PISTON PUMP

PVH074R01AA10A25000000200100010A   PVH74C-RSF-1S-10-C25-31      VICKERS PISTON PUMP

PVH074R01AA10B25200000200100010A   PVH74C-RSF-1S-10-C25V-31     VICKERS PISTON PUMP

PVH074R01AA10A250000002001AA010A   PVH74C-RSF-1S-11-C25-31      VICKERS PISTON PUMP

PVH074R02AA10A25000000200100010A   PVH74C-RSF-2S-10-C25-31      VICKERS PISTON PUMP

PVH074R02AA10B25200000200100010A   PVH74C-RSF-2S-10-C25V-31     VICKERS PISTON PUMP

PVH074R01AA10A250000001001AB010A   PVH74QIC-RF-1S-10-C25-31     VICKERS PISTON PUMP

PVH074R01AA10B252000001001AB010A   PVH74QIC-RF-1S-10-C25V-31    VICKERS PISTON PUMP

PVH074R01AA10A250000001001AE010A   PVH74QIC-RF-1S-11-C25-31     VICKERS PISTON PUMP

PVH074R01AA10B252000001001AE010A   PVH74QIC-RF-1S-11-C25V-31    VICKERS PISTON PUMP

PVH074R02AA10A250000001001AB010A   PVH74QIC-RF-2S-10-C25-31     VICKERS PISTON PUMP

PVH074R02AA10B252000001001AB010A   PVH74QIC-RF-2S-10-C25V-31    VICKERS PISTON PUMP

PVH074R02AA10A250000001001AE010A   PVH74QIC-RF-2S-11-C25-31     VICKERS PISTON PUMP

PVH074R02AA10B252000001001AE010A   PVH74QIC-RF-2S-11-C25V-31    VICKERS PISTON PUMP

PVH074R01AB10A250000001001AB010A   PVH74QIC-RM-1S-10-C25-31     VICKERS PISTON PUMP

PVH074R02AB10A250000001001AE010A   PVH74QIC-RM-2S-11-C25-31     VICKERS PISTON PUMP

PVH074R01AA10A250000002001AB010A   PVH74QIC-RSF-1S-10-C25-31    VICKERS PISTON PUMP

PVH074R01AA10B252000002001AB010A   PVH74QIC-RSF-1S-10-C25V-31   VICKERS PISTON PUMP

PVH074R01AA10A250000002001AE010A   PVH74QIC-RSF-1S-11-C25-31    VICKERS PISTON PUMP

PVH074R02AA10A250000002001AB010A   PVH74QIC-RSF-2S-10-C25-31    VICKERS PISTON PUMP

PVH074R02AA10A250000002001AE010A   PVH74QIC-RSF-2S-11-C25-31    VICKERS PISTON PUMP

PVH074R01AB10A250000002001AE010A   PVH74QIC-RSM-1S-11-C25-31    VICKERS PISTON PUMP

VICKERS威格士PVH098型號.

PVH098R01AJ30A25000000100100010A   PVH98C-RF-1S-10-C25-31       VICKERS PISTON PUMP

PVH098R01AJ30B25200000100100010A   PVH98C-RF-1S-10-C25V-31      VICKERS PISTON PUMP

PVH098R01AJ30B252000001001AA010A   PVH98C-RF-1S-11-C25V-31      VICKERS PISTON PUMP

PVH098R02AJ30A25000000100100010A   PVH98C-RF-2S-10-C25-31       VICKERS PISTON PUMP

PVH098R02AJ30B25200000100100010A   PVH98C-RF-2S-10-C25V-31      VICKERS PISTON PUMP

PVH098R02AJ30B252000001001AA010A   PVH98C-RF-2S-11-C25V-31      VICKERS PISTON PUMP

PVH098R01AJ30A25000000200100010A   PVH98C-RSF-1S-10-C25-31      VICKERS PISTON PUMP

PVH098R01AJ30B25200000200100010A   PVH98C-RSF-1S-10-C25V-31     VICKERS PISTON PUMP

PVH098R02AJ30A25000000200100010A   PVH98C-RSF-2S-10-C25-31      VICKERS PISTON PUMP

PVH098R02AJ30B25200000200100010A   PVH98C-RSF-2S-10-C25V-31     VICKERS PISTON PUMP

PVH098R01AJ30A250000001001AB010A   PVH98QIC-RF-1S-10-C25-31     VICKERS PISTON PUMP

PVH098R01AJ30B252000001001AB010A   PVH98QIC-RF-1S-10-C25V-31    VICKERS PISTON PUMP

PVH098R01AJ30A250000001001AE010A   PVH98QIC-RF-1S-11-C25-31     VICKERS PISTON PUMP

PVH098R02AJ30B252000001001AB010A   PVH98QIC-RF-2S-10-C25V-31    VICKERS PISTON PUMP

PVH098R02AJ30A250000001001AE010A   PVH98QIC-RF-2S-11-C25-31     VICKERS PISTON PUMP

PVH098R01AD30A250000001001AB010A   PVH98QIC-RM-1S-10-C25-31     VICKERS PISTON PUMP

PVH098R01AD30A250000001001AE010A   PVH98QIC-RM-1S-11-C25-31     VICKERS PISTON PUMP

PVH098R01AJ30A250000002001AB010A   PVH98QIC-RSF-1S-10-C25-31    VICKERS PISTON PUMP

PVH098R01AJ30B252000002001AB010A   PVH98QIC-RSF-1S-10-C25V-31   VICKERS PISTON PUMP

PVH098R01AJ30A250000002001AE010A   PVH98QIC-RSF-1S-11-C25-31    VICKERS PISTON PUMP

PVH098R02AJ30A250000002001AB010A   PVH98QIC-RSF-2S-10-C25-31    VICKERS PISTON PUMP

PVH098R02AJ30A250000002001AE010A   PVH98QIC-RSF-2S-11-C25-31    VICKERS PISTON PUMP

PVH098R01AD30A250000002001AB010A   PVH98QIC-RSM-1S-10-C25-31    VICKERS PISTON PUMP

PVH098R01AD30A250000002001AE010A   PVH98QIC-RSM-1S-11-C25-31    VICKERS PISTON PUMP

PVH098R01AD30B252000002001AE010A   PVH98QIC-RSM-1S-11-C25V-31   VICKERS PISTON PUMP  VICKERS威格士PVH柱塞泵/東莞威格士