原裝YUKEN日本油研雙聯(lián)葉片泵PV2R12-8-47-F-REAA-40葉片泵轉(zhuǎn)子旋轉(zhuǎn)時(shí)，葉片在離心力和壓力油的作用下，尖部緊貼在定子內(nèi)表面上。這樣兩個(gè)葉片與轉(zhuǎn)子和定子內(nèi)表面所構(gòu)成的工作容積，先由小到大吸油后再由大到小排油，葉片旋轉(zhuǎn)一周時(shí)，完成兩次吸油與排油。 　
泵由轉(zhuǎn)子1、定子2、葉片3、配油盤和端蓋等部件所組成。定子的內(nèi)表面是圓柱形孔。轉(zhuǎn)子和定子之間存在著偏心。葉片在轉(zhuǎn)子的槽內(nèi)可靈活滑動(dòng)，在轉(zhuǎn)子轉(zhuǎn)動(dòng)時(shí)的離心力以及通入葉片根部壓力油的作用下，葉片頂部貼緊在定子內(nèi)表面上，于是兩相鄰葉片、配油盤、定子和轉(zhuǎn)子間便形成了一個(gè)個(gè)密封的工作腔。當(dāng)轉(zhuǎn)子按逆時(shí)針方向旋轉(zhuǎn)時(shí)，圖右側(cè)的葉片向外伸出，密封工作腔容積逐漸增大，產(chǎn)生真空，于是通過吸油口6和配油盤5上窗口將油吸入。而在圖的左側(cè)。葉片往里縮進(jìn)，密封腔的容積逐漸縮小，密封腔中的油液經(jīng)配油盤另一窗口和壓油口1被壓出而輸出到系統(tǒng)中去。這種泵在轉(zhuǎn)子轉(zhuǎn)一轉(zhuǎn)過程中，吸油壓油各一次，故稱單作用泵。轉(zhuǎn)子受到徑向液壓不平衡作用力，故又稱非平衡式泵，其軸承負(fù)載較大。改變定子和轉(zhuǎn)子間的偏心量，便可改變泵的排量，故這種泵都是變量泵。
Yuken油研葉片泵PV2R12雙聯(lián)泵系列本型泵由同一軸驅(qū)動(dòng)的兩個(gè)PV2R型單泵并聯(lián)組裝在同一殼體內(nèi)而成。
輸出流量可以輸向兩個(gè)獨(dú)立的回路。型號(hào)說明
PV2R12 - 14-33- F- R A A A - 4222
PV2R12----序列號(hào)
14-----------小流量泵 公稱排量（cm/rev）
33---------大流量泵 公稱排量（cm/rev）
F-----------安裝方式   L=底座安裝型   F=法蘭安裝型
R----------旋轉(zhuǎn)方向   R=順時(shí)針方面（標(biāo)準(zhǔn)） L=逆時(shí)針方向
A----------小流量泵 輸出口位置    A=上（標(biāo)準(zhǔn)）
A----------大流量泵 輸出口位置    A=上（標(biāo)準(zhǔn)）
A----------吸入口位置    A=上（標(biāo)準(zhǔn)）
4222-----設(shè)計(jì)號(hào)
原裝日本油研雙聯(lián)葉片泵PV2R12-8-47-F-REAA-40常用型號(hào)
PV2R12-6-26-L-RAAA-4222         PV2R12-6-26-F-RAAA-4222               PV2R12-6-26-L-LAAA-4222             
PV2R12-6-26-F-LAAA-4222         PV2R12-8-26-L-RAAA-4222               PV2R12-8-26-F-RAAA-4222             
PV2R12-8-26-L-LAAA-4222         PV2R12-8-26-F-LAAA-4222                PV2R12-10-26-L-RAAA-4222
PV2R12-10-26-F-RAAA-4222        PV2R12-10-26-L-LAAA-4222             PV2R12-10-26-F-LAAA-4222
PV2R12-12-26-L-RAAA-4222        PV2R12-12-26-F-RAAA-4222             PV2R12-12-26-L-LAAA-4222            
PV2R12-12-26-F-LAAA-4222        PV2R12-14-26-L-RAAA-4222             PV2R12-14-26-F-RAAA-4222
PV2R12-14-26-L-LAAA-4222        PV2R12-14-26-F-LAAA-4222              PV2R12-17-26-L-RAAA-4222            
PV2R12-17-26-F-RAAA-4222        PV2R12-17-26-L-LAAA-4222             PV2R12-17-26-F-LAAA-4222
PV2R12-19-26-L-RAAA-4222        PV2R12-19-26-F-RAAA-4222             PV2R12-19-26-L-LAAA-4222           
PV2R12-19-26-F-LAAA-4222        PV2R12-23-26-L-RAAA-4222             PV2R12-23-26-F-RAAA-4222           
PV2R12-23-26-L-LAAA-4222        PV2R12-23-26-F-LAAA-4222              PV2R12-25-26-L-RAAA-4222           
PV2R12-25-26-F-RAAA-4222        PV2R12-25-26-L-LAAA-4222             PV2R12-25-26-F-LAAA-4222
PV2R12-31-26-L-RAAA-4222        PV2R12-31-26-F-RAAA-4222             PV2R12-31-26-L-LAAA-4222           
PV2R12-31-26-F-LAAA-4222        PV2R12-6-33-L-RAAA-4222                PV2R12-6-33-F-RAAA-4222              
PV2R12-6-33-L-LAAA-4222         PV2R12-6-33-F-LAAA-4222                PV2R12-8-33-L-RAAA-4222             
PV2R12-8-33-F-RAAA-4222         PV2R12-8-33-L-LAAA-4222               PV2R12-8-33-F-LAAA-4222
PV2R12-10-33-L-RAAA-4222        PV2R12-10-33-F-RAAA-4222             PV2R12-10-33-L-LAAA-4222            
PV2R12-10-33-F-LAAA-4222        PV2R12-12-33-L-RAAA-4222             PV2R12-12-33-F-RAAA-4222            
PV2R12-12-33-L-LAAA-4222        PV2R12-12-33-F-LAAA-4222               PV2R12-14-33-L-RAAA-4222           
PV2R12-14-33-F-RAAA-4222        PV2R12-14-33-L-LAAA-4222             PV2R12-14-33-F-LAAA-4222
PV2R12-17-33-L-RAAA-4222        PV2R12-17-33-F-RAAA-4222             PV2R12-17-33-L-LAAA-4222
PV2R12-17-33-F-LAAA-4222        PV2R12-19-33-L-RAAA-4222             PV2R12-19-33-F-RAAA-4222           
PV2R12-19-33-L-LAAA-4222        PV2R12-19-33-F-LAAA-4222              PV2R12-23-33-L-RAAA-4222           
PV2R12-23-33-F-RAAA-4222        PV2R12-23-33-L-LAAA-4222             PV2R12-23-33-F-LAAA-4222
PV2R12-25-33-L-RAAA-4222        PV2R12-25-33-F-RAAA-4222             PV2R12-25-33-L-LAAA-4222            
PV2R12-25-33-F-LAAA-4222        PV2R12-31-33-L-RAAA-4222             PV2R12-31-33-F-RAAA-4222            
PV2R12-31-33-L-LAAA-4222        PV2R12-31-33-F-LAAA-4222              PV2R12-6-41-L-RAAA-4222             
PV2R12-6-41-F-RAAA-4222         PV2R12-6-41-L-LAAA-4222                PV2R12-6-41-F-LAAA-4222
PV2R12-8-41-L-RAAA-4222         PV2R12-8-41-F-RAAA-4222               PV2R12-8-41-L-LAAA-4222             
PV2R12-8-41-F-LAAA-4222         PV2R12-10-41-L-RAAA-4222             PV2R12-10-41-F-RAAA-4222            
PV2R12-10-41-L-LAAA-4222        PV2R12-10-41-F-LAAA-4222              PV2R12-12-41-L-RAAA-4222           
PV2R12-12-41-F-RAAA-4222        PV2R12-12-41-L-LAAA-4222             PV2R12-12-41-F-LAAA-4222
PV2R12-14-41-L-RAAA-4222        PV2R12-14-41-F-RAAA-4222             PV2R12-14-41-L-LAAA-4222            
PV2R12-14-41-F-LAAA-4222        PV2R12-17-41-L-RAAA-4222             PV2R12-17-41-F-RAAA-4222           
PV2R12-17-41-L-LAAA-4222        PV2R12-17-41-F-LAAA-4222              PV2R12-19-41-L-RAAA-4222            
PV2R12-19-41-F-RAAA-4222        PV2R12-19-41-L-LAAA-4222             PV2R12-19-41-F-LAAA-4222
PV2R12-23-41-L-RAAA-4222        PV2R12-23-41-F-RAAA-4222             PV2R12-23-41-L-LAAA-4222            
PV2R12-23-41-F-LAAA-4222        PV2R12-25-41-L-RAAA-4222             PV2R12-25-41-F-RAAA-4222           
PV2R12-25-41-L-LAAA-4222        PV2R12-25-41-F-LAAA-4222              PV2R12-31-41-L-RAAA-4222           
PV2R12-31-41-F-RAAA-4222        PV2R12-31-41-L-LAAA-4222             PV2R12-31-41-F-LAAA-4222
PV2R12-6-47-L-RAAA-4222         PV2R12-6-47-F-RAAA-4222                PV2R12-6-47-L-LAAA-4222             
PV2R12-6-47-F-LAAA-4222         PV2R12-8-47-L-RAAA-4222               PV2R12-8-47-F-RAAA-4222              
PV2R12-8-47-L-LAAA-4222         PV2R12-8-47-F-LAAA-4222                 PV2R12-10-47-L-RAAA-4222            
PV2R12-10-47-F-RAAA-4222        PV2R12-10-47-L-LAAA-4222             PV2R12-10-47-F-LAAA-4222
PV2R12-12-47-L-RAAA-4222        PV2R12-12-47-F-RAAA-4222             PV2R12-12-47-L-LAAA-4222            
PV2R12-12-47-F-LAAA-4222        PV2R12-14-47-L-RAAA-4222             PV2R12-14-47-F-RAAA-4222            
PV2R12-14-47-L-LAAA-4222        PV2R12-14-47-F-LAAA-4222              PV2R12-17-47-L-RAAA-4222            
PV2R12-17-47-F-RAAA-4222        PV2R12-17-47-L-LAAA-4222             PV2R12-17-47-F-LAAA-4222
PV2R12-19-47-L-RAAA-4222        PV2R12-19-47-F-RAAA-4222             PV2R12-19-47-L-LAAA-4222           
PV2R12-19-47-F-LAAA-4222        PV2R12-23-47-L-RAAA-4222             PV2R12-23-47-F-RAAA-4222            
PV2R12-23-47-L-LAAA-4222        PV2R12-23-47-F-LAAA-4222              PV2R12-25-47-L-RAAA-4222           
PV2R12-25-47-F-RAAA-4222        PV2R12-25-47-L-LAAA-4222             PV2R12-25-47-F-LAAA-4222
PV2R12-31-47-L-RAAA-4222        PV2R12-31-47-F-RAAA-4222             PV2R12-31-47-L-LAAA-4222            
PV2R12-31-47-F-LAAA-4222        PV2R12-6-53-L-RAAA-4222                PV2R12-6-53-F-RAAA-4222               
PV2R12-6-53-L-LAAA-4222         PV2R12-6-53-F-LAAA-4222                 PV2R12-8-53-L-RAAA-4222 
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