德國力士樂REXROTH齒輪泵
力士樂齒輪泵要平穩(wěn)地工作，齒輪嚙合時的重疊系數(shù)必須大于1，即至少有一對以上的輪齒同時嚙合，因此，在工作過程中，就有一部分油液困在兩對輪齒嚙合時所形成的封閉油腔之內(nèi)，受困油液受到擠壓而產(chǎn)生瞬間高壓，密封容腔的受困油液若無油道與排油口相通，油液將從縫隙中被擠出，導致油液發(fā)熱，軸承等零件也受到附加沖擊載荷的作用；若密封容積增大時，無油液的補充，又會造成局部真空，使溶于油液中的氣體分離出來，產(chǎn)生氣穴，這就是齒輪泵的困油現(xiàn)象。
困油現(xiàn)象使齒輪泵產(chǎn)生強烈的噪聲，并引起振動和汽蝕，同時降低泵的容積效率，影響工作的平穩(wěn)性和使用壽命。消除困油的方法，通常是在兩端蓋板上開卸槽，見圖2.5（d）中的虛線方框。當封閉容積減小時，通過右邊的卸菏槽與壓油腔相通，而封閉容積增大時，通過左邊的卸荷槽與吸油腔通，兩卸荷糟的間距必須確保在任何時候都不使吸、排油相通。
力士樂齒輪泵的困油現(xiàn)象及消除措施
徑向不平衡力 Radial Unbalance Force
在齒輪泵中，油液作用在輪外緣的壓力是不均勻的，從低壓腔到高壓腔，壓力沿齒輪旋轉的方向逐齒遞增，因此，齒輪和軸受到徑向不平衡力的作用，工作壓力越高，徑向不平衡力越大，徑向不平衡力很大時，能使泵軸彎曲，導致齒頂壓向定子的低壓端，使定子偏磨，同時也加速軸承的磨損，降低軸承使用壽命。為了減小徑向不平衡力的影響，常采取縮小壓油口的辦法，使壓油腔的壓力僅作用在一個齒到兩個齒的范圍內(nèi)，同時，適當增大徑向間隙，使齒頂不與定子內(nèi)表面產(chǎn)生金屬接觸，并在支撐上多采用滾針軸承或滑動軸承。
德國力士樂REXROTH齒輪泵型號：
A10VS071DFR1/31R-PPA12N00
A10VS028DR/31R-PPA12N00
A10VS0180DR/31R-PPA12KD1
A10VS071DFR/31R-PPA12N00
A10VS0140DRS/32R-VPB12N00
A11VL0190+A10V028+G2
A10VSO18DFR1/31R-PPA12N00
A10VSO140DFR1/31R-PPB12N00
AE-A10VSO140D/31R-PPB12N00
A10VS071DR/31R-PPA12N00
A10V0100DR/31R-PSC11N00
A10VO28DR/31R-PSC62K-01-S1581
A10VSO 28 DR/31R PSC12 N00
A10VS0140DR/32R-PPA12N00
AE-A10VSO140D/31R-PPB12N00
A10VS0100DR/31R-PTA12N00
A10V028DR/31R-PSC62K01
A10V028DFR1/31R-PSC62N00
A11VL0190LRDU2+A10V028DR/31-KK
A10VG45EZ2DM1/10L-NTC10F023SHK
A10VG45EZ2DM1/10R-NSC10F013DH
A10V028DFR/31L-PSC12K01+
A10VG63EP11/10R-NSC10F003D-SE
A10VS071-DR/31R-PPA12N00
A10VSO 18 DFRI/31R-PPA12N00
A10VS045DR/31RPPB12-NDD
A10V071DFRI/34 PSC6402-S0225
A10VS028DR/31L/PPA12G20+1PF2G2
A11VLO260LRDL.H2/10+A10V028
A11VL190LRDL.H2/10+A10V028
A10VSO140DFLR1/31R-PPB12KO1
A10VSO45DFR1/31R-PPA12N00
A10VS0100DR/31R-PPA12N00
A10VS0100DR/32R-VPB22
A10VS018DR/31R-PPA12N00
A10V028DR/31R-PSC12N00
A10VSO71DFR1/31R-PPA12N00
A10VG18HD1/10L-NSC16N003E
A10VS028DR/31R-PPA12N00
A10VS045DR/31R-PPA12K25
A10VSO045DR/31R-PPA12N00
A10VSO71DFR1/31R-PPA12KB5
A10VSO28DRF1/31R-PSA12N00
A10VSO100DFR1/31R-PPA12K
A10VSO100DFR1/31R-PPA12KB3
A10VSO71DFR/31R-PSC62K07
A10VS045DFR1/31RPPA12NOO
A10V071DFRI/34 PSC6402-S0225
A10VSO-140DR/31R-PPB12N00
A10VS0-71FR1/31R-PPA12N00
A10VS071DFR1/31R-PPB12NOOM
A10VSO100PFR1/31R-PPA12N00
E-A10VSO140DFR1/31R-PPA12N00
E-A10VSO71DFR1/31R-PPA12N00
E-A10VSO45DFR1/31R-PPA12N00
E-A10VSO28DFR1/31R-PPA12N00
A10VO 71DFR1/31RPSC62K07
A10VSO140DFR1S/31RPPB12N0
A10VSO18DFR1/31R-PPA12N00
Rexroth齒輪泵-型號規(guī)格