REXROTH柱塞泵的泵油機(jī)構(gòu)包括兩套精密偶件：柱塞（plunger）+柱塞套(barrel)構(gòu)成柱塞偶件(plunger and barrel assembly)（圖5-11）、（delivery valve）和出油閥座(delivery valve seat)構(gòu)成出油閥偶件(delivery valve assembly

柱塞和柱塞套是一對(duì)精密偶件,，經(jīng)配對(duì)研磨后不能互換,，要求有高的精度和光潔度和好的耐磨性，其徑向間隙為0.002～0.003mm

柱塞頭部圓柱面上切有斜槽,，并通過(guò)徑向孔,、軸向孔與頂部相通，其目的是改變循環(huán)供油量,；柱塞套上制有進(jìn),、回油孔，均與泵上體內(nèi)低壓油腔相通,，柱塞套裝入泵上體后,，應(yīng)用定位螺釘定位。

柱塞頭部斜槽的位置不同,，改變供油量的方法也不同,。

出油閥和出油閥座也是一對(duì)精密偶件，配對(duì)研磨后不能互換,，其配合間隙為0.01mm ,。

出油閥是一個(gè)單向閥，在彈簧壓力作用下,，閥上部圓錐面與閥座嚴(yán)密配合,，其作用是在停供時(shí)，將高壓油管與柱塞上端空腔隔絕,，防止高壓油管內(nèi)的油倒流入噴油泵內(nèi),。

出油閥的下部呈十字?jǐn)嗝妫饶軐?dǎo)向,，又能通過(guò)柴油,。出油閥的錐面下有一個(gè)小的圓柱面,，稱為減壓環(huán)帶，其作用是在供油終了時(shí),，使高壓油管內(nèi)的油壓迅速下降,，避免噴孔處產(chǎn)生滴油現(xiàn)象。當(dāng)環(huán)帶落入閥座內(nèi)時(shí)則使上方容積很快增大,，壓力迅速減小,，停噴迅速。

REXROTH柱塞泵：部分型號(hào)

A4VG71DWDMT2/23L-NZF02F041D,
A4VG250HD1D1/32LNZD10F001S,
A4VG125HD1D2/32R-NTF02F691P,
A4VG125HD1D2/32R-NSF02F02F021P,
A4VG125HDMT1-32R-NSF02F691S-S,
A4VG125EP2/32+A10V028DR/31 ,
A4VG125HDMT1/32R-NSFO21S-S ,
A4VG125HD1D2/32R-NSF001S,
A4VG125HD1D2/32R-NSF001S,
A4VG125HD1D2/32R-NSF001S,
A4VG125HD1P1/32R-N2D10F69, 
A4VG125EP2D1/32R-NAF02K691EP-4 ,
A4VG125DA2D2/32R-NAF02F021DT,
A4VG56EZ2DM1/32L-NSC02F013SH-K,
A4VG56EZ2DM1/32R-NSC02F013SH,
A4VG90HWDL1/32R-NAF02F071L-S+A, 
A4VG90HWDL1/32L-NZF02F001S-S B,
A4VG125EP2D1/32R-NAF02K691EP-4,
A4VG125EP2DT1/32R-NAF02F011S,
A4VG125HD1D2/32R-NTF02F691P ,
A10VSO28DFR1/31R-PPA12N00,
A10VSO45DFR1/31R-PPA12N00,
A10VSO71DFR1/31R-PPA12N00,
A10VSO100DFR1/31R-PPB12N00,
A10VSO140DFR1/31R-PPA12N00,
A10VSO45DFR1/32R-PPB12N00,
A10VSO100DFR1/32R-PPB12N00,
A10VSO071DFR1/32R-VPB12N00,
A10VSO140DFR1/32R-VPB12N00,
A10VSO140DRS/32R-VPB22U99,
A10VSO140DFLR1/31R-PPB12KO1,
A10VSO45DFR1/31R-PPA12N00,
A10VS0100DR/31R-PPA12N00,

此版權(quán)信息屬于上海維特銳,，欲了解相關(guān)產(chǎn)品,，請(qǐng)點(diǎn)擊：REXROTH柱塞泵