液壓馬達(dá)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(zhuǎn)變?yōu)槠漭敵鲚S的機(jī)械能(轉(zhuǎn)矩和轉(zhuǎn)速)。液體是傳遞力和運(yùn)動的介質(zhì)。液壓馬達(dá)，亦稱為油馬達(dá)，主要應(yīng)用于注塑機(jī)械、船舶、起揚(yáng)機(jī)、工程機(jī)械、建筑機(jī)械、煤礦機(jī)械、礦山機(jī)械、冶金機(jī)械、船舶機(jī)械、石油化工、港口機(jī)械等。
徑向柱塞式液壓馬達(dá)
工作原理，當(dāng)壓力油經(jīng)固定的配油軸4的窗口進(jìn)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(dāng)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(zhuǎn)矩，使缸體旋轉(zhuǎn)。缸體再通過端面連接的傳動軸向外輸出轉(zhuǎn)矩和轉(zhuǎn)速。以析的一個柱塞產(chǎn)生轉(zhuǎn)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(zhuǎn)矩都使缸體旋轉(zhuǎn)，并輸出轉(zhuǎn)矩。徑向柱塞液壓馬達(dá)多用于低速大轉(zhuǎn)矩的情況下。
1.單作用連桿型徑向柱塞馬達(dá)
單作用連桿型徑向柱塞馬達(dá)外型呈五角星狀，該馬達(dá)由殼體、曲軸、配流軸、連桿、柱塞和偏心輪等零件組成。
優(yōu)點(diǎn):結(jié)構(gòu)簡單，工作可靠。
缺點(diǎn):體積大、重量大，轉(zhuǎn)扭脈動，低速穩(wěn)定性較差。
2.多作用內(nèi)曲線柱塞馬達(dá)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

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(dá)用，即軸向柱塞泵和軸向柱塞馬達(dá)是可逆的。軸向柱塞馬達(dá)的工作原理為，配油盤和斜盤固定不動，馬達(dá)軸與缸體相連接一起旋轉(zhuǎn)。當(dāng)壓力油經(jīng)配油盤的窗口進(jìn)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(zhuǎn)矩，帶動馬達(dá)軸逆時針方向旋轉(zhuǎn)。軸向柱塞馬達(dá)產(chǎn)生的瞬時總轉(zhuǎn)矩是脈動的。若改變馬達(dá)壓力油輸入方向，則馬達(dá)軸按順時針方向旋轉(zhuǎn)。斜盤傾角a的改變、即排量的變化，不僅影響馬達(dá)的轉(zhuǎn)矩，而且影響它的轉(zhuǎn)速和轉(zhuǎn)向。斜盤傾角越大，產(chǎn)生轉(zhuǎn)矩越大，轉(zhuǎn)速越低。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
柱塞泵 A4VS0250DR/30RPPB13N00
閥柱塞泵 A4VTG71HW/32R-NLD10F001S
柱塞泵 A4VSG750HD/22R-PPH10NOO 
軸向柱塞泵 A4VS07IDR/3XR 
軸向柱塞泵 A4VS0125DR/3XR 
柱塞泵 A4VG90EP2DT1/32R-NAF02F00
柱塞泵 A4VSO-250E02/30R-PPB13N00 
柱塞泵 A4VSO-250DR/30R-PPB13N00
液壓馬達(dá) A4VG40EP4DMT1/32L-NSC02F015PH 
柱塞泵 A4VG71DWDMT2/23L-NZF02F041D 
泵 A4VG250HD1D1/32LNZD10F001S 
柱塞泵 A4VS0125DR30R-PPB13N00 
柱塞泵 A4VG125HD1D2/32R-NTF02F691P 
柱塞泵 A4VG125HD1D2/32R-NSF02F02F021P
串泵 A4VG125HDMT1-32R-NSF02F691S-
柱塞泵（二串泵） A4VG125EP2/32+A10V028DR/31 
A4VS0125DR/30R-PPB13N00
A4VS0125LR2N/22L-PZB13A00
A4VG125HDMT1/32R-NSFO21S-S
A4VTG90HW/32R
A4VG125HD1D2/32R-NSF001S
A4VSO180DR/3XR-PPB13N00
A4VSO125DR/3DR-PPB13NOO
A4VS0125LR2N/22L-PZB13A00
A4VTG90HW/3IR-NLD10F001S
A4VG56EZ1DMV32R-PSC02F023E-S
A4VG90EP2DT1/32R-NAF02F001F
A4VG90EP2DT1/32L-NAFO2F001D
E-A4VS0250DR/30RPPB13N00
A4VS0125DR/22R-PPB13N00
A4VS0180DR/30R-PPB13N00
A4VG125HDDT132L-PZF02F001D
EA4VS0125DFR/30R-PPB13N00
A4VS040DR-PPB13N00
A4VS0180DR/22R-PPB13N00
A4VSO40EO/31L-P2BBN00
A4VSO180EO/30L-P2B13N00
A4VS040DR/10X-PPB13N00
AE-A4VS0250E01/30R-PPBN00-S036
A4V125HW10R0C101A-K
AHA4VS0250HD1GB/30R-PZB13K35-S
AHA4VS0250LR3G/30R-PZB13K35-S0
AHA4VS0250LR3G/30R-PZB13N00-S0
A4VG180HDMT1/32R-NSD02F021SG-S
A4VG180EP2DT1/32R-NTD02F021SH
AHA4VS0250HD1GB/30R-PZB13K35-S
AHA4VS0250LR3G/30R-PZB13K35-S0
AHA4VS0250LR3G/30R-PZB13N00-S0
A4VG250HD1D1/32LNZD10F001S
A4VG125HDDT1/32L-PZF02F001D
A4V125HW10R0C101A-K

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(dá)用，即軸向柱塞泵和軸向柱塞馬達(dá)是可逆的。軸向柱塞馬達(dá)的工作原理為，配油盤和斜盤固定不動，馬達(dá)軸與缸體相連接一起旋轉(zhuǎn)。當(dāng)壓力油經(jīng)配油盤的窗口進(jìn)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(zhuǎn)矩，帶動馬達(dá)軸逆時針方向旋轉(zhuǎn)。軸向柱塞馬達(dá)產(chǎn)生的瞬時總轉(zhuǎn)矩是脈動的。若改變馬達(dá)壓力油輸入方向，則馬達(dá)軸按順時針方向旋轉(zhuǎn)。斜盤傾角a的改變、即排量的變化，不僅影響馬達(dá)的轉(zhuǎn)矩，而且影響它的轉(zhuǎn)速和轉(zhuǎn)向。斜盤傾角越大，產(chǎn)生轉(zhuǎn)矩越大，轉(zhuǎn)速越低。
MR190C-P1N1V1C1N0300/60083
MR190C-P1Q1V1C1N0300/59659
MR200D-F2N1N1C1NX0500/59286
MR200D-F2N1N1N1NX0500/59331-A
MR200D-F2N1N2N1NX0500/59151-A
MR225CA-F1N1N1C1N0100/56720
MR225D-F1N1N1C1N0500/56790
MR2400I-D1N1N1S1NX0300/58139
MR2400I-F1N1N1S3NX0300/59341-D
MR2400I-F1Q1V1S1N0300/60468
MR2400I-F2N1N1N3NX0300/58203
MR2400I-F2N1N1S1NX0300/58333
MR2400I-F2N1N1S3NX0300/59340-C
MR2400I-N1N1N1L1N0300/58315
MR2400I-P1N1V1C1N0300/59238
MR2400I-P1Q1N1C1N0300/58673
MR2400I-P1T1N1N1N0300/58568
MR250D-D1B1U1N1N0500/60644
MR250D-D1N1N1N1N0500/59690
MR250D-F2N1N1C1NX0502/60793
MR250D-F2N1N1N1NX0502/60874-A
MR250D-F2N1N2N1NX0502/61011-A
MR250D-N1N1N1N1N0001/45245
MR250D-P1B1N1S1N0001/34732
MR250D-P1E1N1N1N0001/34344
MR250D-P1N1N1C1N0000/53031
MR250D-P1N1N1C1N0500/59221
MR250D-P1N1N1N1N0500/59086
MR250D-P1Q1N1C1N0001/58348
MR250D-P1Q1N1N1N0001/34449
MR250D-P1Q1V1C1N0500/59751
MR2800I-F1N1N1C1S0500/60232
MR2800I-F1N1N1N3NX0500/58193
MR2800I-F1Q1V1S1N0500/60467
MR2800I-F2N1N1N3NX0500/58210
MR2800I-N1N1N1N1N0401/46778
MR2800I-N1N1N1N1N0500/58037
MR2800I-N1N1U1N1N0401/34669
MR2800I-N1T1N1N1N0500/58283
MR2800I-P1B1N1N1N0500/59803
MR2800I-P1N1N1N1N0401/33487
MR2800I-P1N1N1N1N0500/58152
MR280E-F1N1N1S1NX0301/34244
MR300D-D1N1N1N1N0500/59591
MR300D-D1N1U1N1N0401/34218
MR300D-D1N1U1N1N0500/59688
MR300D-D1Q1N1N1N0500/60101
MR300D-F1N1N1N1N0500/59169
MR300D-F1N1N1S1N0500/60674
MR300D-F1T1N1S1N0500/60675
MR300D-F2N1N2N1NX0500/59153-A

折疊低速馬達(dá)
轉(zhuǎn)速低于500r/min的液壓馬達(dá)屬于低速液壓馬達(dá)。它的基本形式是徑向柱塞式。低速液壓馬達(dá)的主要特點(diǎn)是:排量大，體積大，轉(zhuǎn)速低，可以直接與工作機(jī)構(gòu)連接，不需要減速裝置，使傳動機(jī)構(gòu)大大簡化，低速液壓馬達(dá)的輸出扭矩較大，可達(dá)幾千到幾萬Nm，因此又稱為低速大扭矩液壓馬達(dá)。