詳細介紹
REXROTH柱塞泵的泵油機構(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精密偶件,經(jīng)配對研磨后不能互換,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、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精密偶件,配對研磨后不能互換,其配合間隙為0.01mm 。
出油閥是一個單向閥,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,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?,既能?dǎo)向,又能通過柴油。出油閥的錐面下有一個小的圓柱面,稱為減壓環(huán)帶,其作用是在供油終了時,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
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,
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