液壓馬達是液壓系統(tǒng)的一種執(zhí)行元件，它將液壓泵提供的液體壓力能轉變?yōu)槠漭敵鲚S的機械能(轉矩和轉速)。液體是傳遞力和運動的介質(zhì)。液壓馬達，亦稱為油馬達，主要應用于注塑機械、船舶、起揚機、工程機械、建筑機械、煤礦機械、礦山機械、冶金機械、船舶機械、石油化工、港口機械等。
徑向柱塞式液壓馬達
工作原理，當壓力油經(jīng)固定的配油軸4的窗口進入缸體內(nèi)柱塞的底部時，柱塞向外伸出，緊緊頂住定子的內(nèi)壁，由于定子與缸體存在一偏心距。在柱塞與定子接觸處，定子對柱塞的反作用力為 。力可分解為和 兩個分力。當作用在柱塞底部的油液壓力為p，柱塞直徑為d，力和之間的夾角為X時，力對缸體產(chǎn)生一轉矩，使缸體旋轉。缸體再通過端面連接的傳動軸向外輸出轉矩和轉速。以析的一個柱塞產(chǎn)生轉矩的情況，由于在壓油區(qū)作用有好幾個柱塞，在這些柱塞上所產(chǎn)生的轉矩都使缸體旋轉，并輸出轉矩。徑向柱塞液壓馬達多用于低速大轉矩的情況下。
1.單作用連桿型徑向柱塞馬達
單作用連桿型徑向柱塞馬達外型呈五角星狀，該馬達由殼體、曲軸、配流軸、連桿、柱塞和偏心輪等零件組成。
優(yōu)點:結構簡單，工作可靠。
缺點:體積大、重量大，轉扭脈動，低速穩(wěn)定性較差。
2.多作用內(nèi)曲線柱塞馬達MRE2100H-D1N1U1N1NX0800/34687
MRE2100H-F1N1N1S1NX0800/58329
MRE3100I-D1N1N1N1N0201/33492
MRE3100I-D2N1F1N1N0300/58540
MRE3100I-F1N1N1N3NX0300/58194
MRE3100I-F2N1N1N3NX0300/58211
MRE3100I-N1N1N1N1N0300/58042
MRE3100I-N1Q1N1S1N0300/60182
MRE3100I-P1N1N1C1N0300/60144
MR  125C P1N1N1C1N  0001/58357
MR 190C N1N1N1N1N0201/45170
MR 2400I P1N1N1G1N 0300/58660
MR 2800I P1N1N1C1N 0500/58352
MR 300D D1N1N1C1N  0401/58360
MR 300D N1N1N1N1N0401/45228
MR 450E D2N1F1N1N0301/34760
MR 450E N1M2N1N1N0301/45396
MR 700 N* 277297 SAE FLANGE
MR1000G-F2N1N1N1NP1000/52734
MR1000G-F2N1N1N1NX1000/58014-B
MR1000G-F2N1N1N1NX1000/58016-C
MR1000G-F2N1N1N1NX1000/58532-B
MR1000G-F2N1N1N1NX1000/58533-C
MR1000G-F2N1N1S1NX1000/34747
MR1000G-N1N1N1N1N1000/33978
MR1100G N1N1N1 S1 N
MR1100G-D1B1N1N1N1000/34852
MR1100G-D1B1N1T1N1000/60559
MR1100G-D1N1N1C1N1000/58641
MR1100G-D1N1N1N1N1000/34008
MR1100G-F1N1N1N1N1000/33943
MR1100G-F1N1N1S1NX1000/58326
MR1100G-F2N1N1N1NX1000/33953-B
MR1100G-F2N1N1N1NX1000/33954-C
MR1100G-F2N1N1S4NX1000/59336-B
MR1100G-F2N1N1S4NX1000/59337-C
MR1100G-N1C1N1N1N1000/47741
MR1100G-N1E1N1N1N1000/33945
MR1100G-N1N1N1C1N1000/34301
MR1100G-N1N1U1N1N1000/34468
MR1100G-N1Q1N1N1N1000/33981
MR1100G-N2N1F1C1N1000/59651
MR1100G-P1B1N1C1N1000/34798
MR1100G-P1N1N1C1N1000/34295
MR1100G-P1N1N1N1N1000/33944
MR1100G-P1N1N1N1S1000/58675
MR1100G-P1Q1N1N1N1000/34613
MR110B-D1N1N1N1N0100/60034
MR110B-D1Q1N1N1N0100/60102
MR110B-D2B1N1C1N0102/60868
MR110B-N1N1N1S1N0000/58937
MR125C-P1N1N1C1N0300/60095

工作原理，當壓力油經(jīng)固定的配油軸4的窗口進入缸體內(nèi)柱塞的底部時，柱塞向外伸出，緊緊頂住定子的內(nèi)壁，由于定子與缸體存在一偏心距。在柱塞與定子接觸處，定子對柱塞的反作用力為 。力可分解為和 兩個分力。當作用在柱塞底部的油液壓力為p，柱塞直徑為d，力和之間的夾角為X時，力對缸體產(chǎn)生一轉矩，使缸體旋轉。缸體再通過端面連接的傳動軸向外輸出轉矩和轉速。以析的一個柱塞產(chǎn)生轉矩的情況，由于在壓油區(qū)作用有好幾個柱塞，在這些柱塞上所產(chǎn)生的轉矩都使缸體旋轉，并輸出轉矩。徑向柱塞液壓馬達多用于低速大轉矩的情況下。CALZONI卡桑尼 MR300D-N1T1N1N1N0401
CALZONI卡桑尼 MR190F*/45174
CALZONI卡桑尼 MRE8500N1
CALZONI卡桑尼 MR1600H-D1N1N1N1N0800/34993
CALZONI卡桑尼 MR1800H-N1N1V1C1N0800/34805
CALZONI卡桑尼 MR1100G-D1N1N1T1N1000/34724
CALZONI卡桑尼 MR1800H-F1C1N1N1N0800/34552
CALZONI卡桑尼 MR1600H-P1N1N1C1N0800/34546
CALZONI卡桑尼 MR1100G-P1N1N1T1N1000/34462
CALZONI卡桑尼 MR1800H-D1N1N1C1N0800/34445
CALZONI卡桑尼 MR1600H-F1N1N1T1N0800/34408
CALZONI卡桑尼 MRE1400G-F1N1N1T1N1000/34407
CALZONI卡桑尼 MR1100G-F1N1N1T1N1000/34406
CALZONI卡桑尼 MR1800H-P2N1N1N1N0800/34335
CALZONI卡桑尼 MRE1400P*$FTA/34319
CALZONI卡桑尼 MR1800H-N1N1N1C1N0800/34302
CALZONI卡桑尼 MR1100G-N1N1N1C1N1000/34301
CALZONI卡桑尼 MR1100G-P1N1N1C1N1000/34295
CALZONI卡桑尼 MRE1400/1333/34282
CALZONI卡桑尼 MRE2100H-N1N1U1N1NX0800/34278
CALZONI卡桑尼 MR1800H-P1N1N1T1N0800/34249
CALZONI卡桑尼 MRE2100H-F1N1N1S2NX0800/34222
CALZONI卡桑尼 MR1800H-N1N1N1SNX0800/34065
CALZONI卡桑尼 MR1600H-F1N1N1N1N0800/34063
CALZONI卡桑尼 MR1800H-P1N1N1C1N0800/34055
CALZONI卡桑尼 MR1100G-N1N1N1T1N1000/34049
CALZONI卡桑尼 MR1100G-D1N1N1N1N1000/34008
CALZONI卡桑尼 MRE1400G-F1N1N1S2NX1000/34002
CALZONI卡桑尼 MR1100G-F1N1N1S2NX1000/33991
CALZONI卡桑尼 MR1800H-F1N1N1N1N0800/33989
CALZONI卡桑尼 MRE1400B*/33988
CALZONI卡桑尼 MR1100G-N1N1N1S1NX1000/33980
CALZONI卡桑尼 MRE1400P*/33973
CALZONI卡桑尼 MR1800H-F1N1N1S2NX0800/33970
CALZONI卡桑尼 MR1800H-P1T1N1N1N0800/33967
CALZONI卡桑尼 MR1800H-P1N1N1N1N0800/33964
CALZONI卡桑尼 MR1600H-X2N1N1S1NX0800/33963
CALZONI卡桑尼 MR1100G-F1N1N1S2NX1000/33960
CALZONI卡桑尼 MRE1400G-D1N1N1N1NX1000/33959
CALZONI卡桑尼 MR1100G-F1Q1N1N1N1000/33956
CALZONI卡桑尼 MR1100G-N1T1N1N1N1000/33946
CALZONI卡桑尼 MR1100P*/33944

但是，由于液壓馬達和液壓泵的工作條件不同，對它們的性能要求也不一樣，所以同類型的液壓馬達和液壓泵之間，仍存在許多差別。首先液壓馬達應能夠正、反轉，因而要求其內(nèi)部結構對稱;液壓馬達的轉速范圍需要足夠大，特別對它的穩(wěn)定轉速有一定的要求。因此，它通常都采用滾動軸承或靜壓滑動軸承;其次液壓馬達由于在輸入壓力油條件下工作，因而不必具備自吸能力，但需要一定的初始密封性，才能提供必要的起動轉矩。由于存在著這些差別，使得液壓馬達和液壓泵在結構上比較相似，但不能可逆工作。MR500F-F1N1N1S1NX0701/58323
MR500F-F1N1N1S1NX0900/59830
MR500F-F2N1N1C1NX0902/60886
MR500F-F2N1N1N1NX0701/34963-B
MR500F-F2N1N1S3NX0800/59444-B
MR500F-F2N1N1S3NX0902/60825-B
MR500F-F2N1N2N1NX0902/60824-B
MR500F-F2N1N2S3NX0900/59439-B
MR57A-F1N1V1S1N0200/58481
MR57A-N1N1V1S1N0200/58366
MR57A-P1N1N1N1N0000/34768
MR57A-P1N1N1N1N0001/58006
MR57A-P1N1N1S1N0200/58738
MR57A-P1N1V1N1N0200/58373
MR600F-D1B1N1N1N0101/58722
MR600F-D1N1N1C1N0900/59540
MR600F-D1N1U1N1N0101/34878
MR600F-F1N1N1N1N0101/45465
MR600F-F2N1N1C1NX0101/58953
MR600F-F2N1N1C1NX0900/59595
MR600F-F2N1N1N1NX0101/34934-B
MR600F-N1N1N1N1N0101/46448
MR600F-N1N1N1N1N0900/59576
MR600F-P1N1N1C1N0900/59656
MR600F-P2N1F1N1N0900/60322
MR6500M-D2N1N1N1NX0500/60293
MR7000M-F1M1N2N1NX0500/59319
MR7000M-F2N1N1N1N0500/58990
MR7000M-F2N1N1N1NX0400/58206
MR7000M-F2N1N1N1NX0500/59517
MR7000M-F2N1N1S3NX0500/59346
MR7000M-N1N1N1N1N0500/58756
MR7000M-P1N1N1N1N0200/45561
MR700F-D1B1N1N1N0902/60942
MR700F-D1N1N1N1N0900/59377
MR700F-F1N1N1S1NX0800/59358
MR700F-F1N1N1S1NX0902/60844
MR700F-F2N1N1C1NX0701/58036
MR700F-F2N1N1C1NX0701/58038
MR700F-F2N1N1C1NX0900/59552
MR700F-F2N1N1C1NX0900/59807
MR700F-F2N1N1N1NX0701/34931-B
MR700F-F2N1N1S3NX0902/60826-B
MR700F-F2N1N2N1NX0902/60790-B
MR700F-F2N1N2S3NX0902/60968-B
MR700F-N1B1N1S1N0900/60392
MR700F-N1C1N1N1N0701/45415
MR700F-N1N1N1N1N0900/59378
MR700F-N1N1N1S1N0701/58527
MR700F-N1Q1N1N1N0902/60872
MR700F-N1T1N1N1N0900/59700
MR700F-N1T1N1N1N0901/56698
MR700F-P1N1N1C1N0900/59565
MR700F-P1N1N1N1N0900/59454
MR700F-P1Q1N1N1N0701/34591
MR700F-P2Q1N2N1NX0900/59915
MR93B-N1Q1V1C1N0000/59128
MR93B-P1N1N1N1N0000/33325
MRA1600G-F2N1N1S3NX0100/54793
MRA2400H-F2N1N1N1NX0100/58825
MRA2400H-F2N1N1S4NX0100/54794

軸向柱塞泵除閥式配流外，其它形式原則上都可以作為液壓馬達用，即軸向柱塞泵和軸向柱塞馬達是可逆的。軸向柱塞馬達的工作原理為，配油盤和斜盤固定不動，馬達軸與缸體相連接一起旋轉。當壓力油經(jīng)配油盤的窗口進入缸體的柱塞孔時，柱塞在壓力油作用下外伸，緊貼斜盤，斜盤對柱塞產(chǎn)生一個法向反力p，此力可分解為軸向分力及和垂直分力Q。Q與柱塞上液壓力相平衡，而Q則使柱塞對缸體中心產(chǎn)生一個轉矩，帶動馬達軸逆時針方向旋轉。軸向柱塞馬達產(chǎn)生的瞬時總轉矩是脈動的。若改變馬達壓力油輸入方向，則馬達軸按順時針方向旋轉。斜盤傾角a的改變、即排量的變化，不僅影響馬達的轉矩，而且影響它的轉速和轉向。斜盤傾角越大，產(chǎn)生轉矩越大，轉速越低。4系列變量柱塞泵：
A10VSO18DFR1/31R-PPA12NOO、
A10VSO28DFR1/31R-VPA12N00、
A10VSO45DFR1/32R-PPB12N00、                              
A10VSO71DFR1/32R-VPB22U99 
A10VSO100DFR1/32R-VPB12N00、
A10VSO140DRS/32R-VPB22U99等
A4VSO71DR/30R-PPB13N00 
A4VSO125DR/30R-PPB13N00 
A4VSO180DR/30R-PPB13
A4VSO250DR/30R-PPB13NOO等  
A4VSO40LR2G/10R-PPB13N00 
A4VSO71DFR/10X-PPB13N00 
A4VSO71DR/10X-PPB13N00 
A4VSO71DRG/10X-PPB13N00 
A4VSO71LR2/10R-PPB13N00 
A4VSO71LR2D/10R-PPB13N00 
A4VSO125DFR/22R-PPB13N00 
A4VSO125DR/22R-PPB13N00 
A4VSO125DR/22R-VPB13N00 
A4VSO125LR2/22R-PPB13N00 
A4VSO125LR2G/22R-PPB13N00 
A4VSO125LR2N/22R-PPB13N00
A4VSO180LR2N/22R-PPB13N00 
A4VSO250DFR/30R-PPB13N00 
A4VSO250DR/30R-PPB13N00 
A4VSO250DRG/30R-PPB13N00 
A4VSO250LR2/30R-PPB13N00 
A4VSO250LR2G/30R-PPB13N00 
A4VSO250LR2N/30R-PPB13N00 
A4VSO180DFR/22R-PPB13N00 
A4VSO180DR/22R-PPB13N00 
A4VSO180DRG/22R-PPB13N00 
柱塞泵 A4VG90HWD1/32R-NZF001S 
柱塞泵 A4VTG90HW/32R-NLD10F001S 
軸向柱塞泵 A4VSO125DR/PPB13NOO 
變量軸向柱塞泵 A4VSO180DR/30R-PPB13N00 
變量軸向柱塞泵 A4VSO125DR/30R-PPB13N00 
柱塞泵 A4VS0125DR/10R-PPB13N00 
柱塞泵 A4VS071DR/10R-PPB13N00 
柱塞泵 A4VS0125DR/22R 
變量泵 A4VSO250EO2/30R-VPB13N00-SO2
柱塞泵 A4VG125EP2MT1/32-NZF02F021SH-S 
柱塞泵 A4VSO250EO2/30R-VPB13N00-SO2
變量軸向柱塞泵 A4VSO180DR/30R-PPB13N00 
變量軸向柱塞泵 A4VSO125DR/30R-PPB13N00 
油泵 A4VSO180DFR/30R-PPB13N00 
柱塞泵 A4VS0180DR/30R-PPB13N00
軸向柱塞泵主泵 A4VS0125DRG/30R-PPB13N00 
油泵 A4VS071DR/30R-PPB13N00 
德國力士樂A4VG-125泵的配件 主軸 080121-001# 
軸向柱塞泵 E-A4VSO250EO2/30R-VPB25N00-SO3
軸向柱塞泵 E-A4VSO250EO2/30R-VPB25N00-SO3 
柱塞泵 A4VSO180DR/30R-FPB13N00
恒壓變量泵 E-A4VS0125DR/22R-VPB13N00 
柱塞泵 A4VSO180DR/30R-FPB13N00 
柱塞泵 A4VS0180LR2G/30R-PPB13NOO
柱塞泵 A4VSO250LR2D/30R-PPB13NOO 
柱塞泵 A4VSO250DR/30R-PPB13NOO
泵 A4VG56EZ2DM1/32-NSC02F003F