力士樂(lè)內(nèi)嚙合齒輪泵PGH4-30/020RE11VU2  R901147100，德國(guó)REXROTH內(nèi)嚙合齒輪泵，現(xiàn)貨庫(kù)存供應(yīng)，購(gòu)買(mǎi)進(jìn)口液壓、氣動(dòng)、自動(dòng)化控制工業(yè)配件，認(rèn)準(zhǔn)“上海韋米機(jī)電設(shè)備有限公司”，7年老店，保證產(chǎn)品原廠原裝，價(jià)格優(yōu)惠，售后無(wú)憂，歡迎新老客戶咨詢采購(gòu)！
 
齒輪泵的分類(lèi)
屬于結(jié)構(gòu)簡(jiǎn)單,納污能力強(qiáng),工作壓力相對(duì)較低,成本較低的一種, 廣泛用于農(nóng)業(yè)機(jī)械:拖拉機(jī)、收割機(jī)等。工程機(jī)械:叉車(chē)、自卸車(chē)等。
齒輪泵按照齒輪的嚙合形式可分為外嚙合式和內(nèi)嚙合式兩種,按照齒形曲線有漸開(kāi)線形、圓弧齒形和擺線齒形。
2)外嚙合齒輪泵
( 1 )外嚙合齒輪泵的結(jié)構(gòu)。主要由主動(dòng)齒輪、從動(dòng)齒輪、殼體、前后泵體、密封圈和軸承等組成。
外嚙合齒輪泵的結(jié)構(gòu)
1-從動(dòng)齒輪; 2-軸承套; 3-密封圈; 4一前端蓋; 5-密封;6-傳動(dòng)軸;;7-主動(dòng)齒輪;8- 殼體;9后端蓋
( 2 )外嚙合齒輪泵的工作原理
密封容腔由殼體、端蓋和兩對(duì)齒輪的嚙合部位組成。配流裝置由齒輪嚙合線將吸油區(qū)和壓油區(qū)隔開(kāi),起配流作用。
(3)外嚙合齒輪泵的幾個(gè)問(wèn)題
①泄漏問(wèn)題
端面泄露:齒輪端面和軸承套端面之間間隙占80% ,
徑向泄露:齒頂與殼體之間間隙15%
嚙合線泄露:兩個(gè)齒輪互相嚙合部位之間間隙。5%減小端面泄漏的方法:采用端面間隙自動(dòng)補(bǔ)償。
②徑向不平衡力。
泵內(nèi)壓力腔的油液經(jīng)過(guò)徑向間隙逐漸滲漏到吸油腔,其壓力逐漸減小,液壓力作用在齒輪上的合力大致為圖中力F的方向,此力由軸承來(lái)承受,因而影響了軸承的壽命,往往成為提高泵工作壓力的限制因素。
消除方法:
1縮小壓油C即壓力的作用面積減小徑向不平衡力
2.增泵體內(nèi)表面與齒輪頂圓的間隙,使在徑向不平衡力作用時(shí)齒頂和泵體不接觸。
3.開(kāi)壓力平衡槽,但泄漏大,很少用
③流量脈動(dòng)。隨著嚙合點(diǎn)位置的不斷變化,吸、壓油腔在每-瞬間的容積變化率是不均勻的,因此齒輪泵的瞬時(shí)流量是脈動(dòng)的。
④困油現(xiàn)象及消除措施。由 ( a )旋轉(zhuǎn)到 b )所示位置時(shí),閉死容積由大變到小;由( b )旋轉(zhuǎn)到( C )所示位置時(shí),閉死容積從小變到大。這種現(xiàn)象稱(chēng)之為困油現(xiàn)象。
危害:減小時(shí)使被困油擠出產(chǎn)生高壓,增大時(shí)會(huì)造成真空產(chǎn)生穴現(xiàn)象。
消除措施:在軸承套上開(kāi)卸荷槽 , 當(dāng)閉死容積由大變小時(shí),借助卸荷槽與壓油腔相通。當(dāng)閉死容積由小變大時(shí),借助卸荷槽與吸油腔相通。

齒輪泵優(yōu)缺點(diǎn):
結(jié)構(gòu)簡(jiǎn)單、尺寸小、重量輕、價(jià)格低、工作可靠、自吸能力強(qiáng)、對(duì)油液污染不敏感。
泄漏量大、工作壓力低。流量脈動(dòng)大。
提高工作壓力的措施:
減小端面泄漏。齒輪端面間隙自動(dòng)補(bǔ)償。
力士樂(lè)內(nèi)嚙合齒輪泵PGH4-30/020RE11VU2  R901147100
力士樂(lè)REXROTH內(nèi)齒輪泵，固定排量PGH-3X系列
R901282905 PGH4-3X/020LR11VU2
R901147105 PGH4-3X/020RE11VE4
R901147100 PGH4-3X/020RE11VU2
R901147100 PGH4-30/020RE11VU2
R901330079 PGH4-3X/020RE11WE4
R901340844 PGH4-3X/020RE11WU2
R901147110 PGH4-3X/020RR11VU2
R901340845 PGH4-3X/020RR11WU2
R901282906 PGH4-3X/025LR11VU2
R901147106 PGH4-3X/025RE11VE4
R901392048 PGH4-3X/025RE11VE4-C3.1
R901147101 PGH4-3X/025RE11VU2
R901271425 PGH4-3X/025RE11WU2
R901147111 PGH4-3X/025RR11VU2
R901443648 PGH4-3X/025RR11VU2-C3.1
R901357519 PGH4-3X/025RR11WU2
R901282907 PGH4-3X/032LR11VU2
R901147107 PGH4-3X/032RE11VE4
R901147102 PGH4-3X/032RE11VU2
R901400341 PGH4-3X/032RE11VU2-C3.1
R901416754 PGH4-3X/032RE11WE4
R901296753 PGH4-3X/032RE11WU2
R901457883 PGH4-3X/032RE11WU2-A520
R901147112 PGH4-3X/032RR11VU2
R901310645 PGH4-3X/032RR11WU2
R901282908 PGH4-3X/040LR11VU2
R901147108 PGH4-3X/040RE11VE4
R901147103 PGH4-3X/040RE11VU2
R901349646 PGH4-3X/040RE11WE4
R901296755 PGH4-3X/040RE11WU2
R901147113 PGH4-3X/040RR11VU2
R901349822 PGH4-3X/040RR11VU2-A509
R901428459 PGH4-3X/040RR11VU2-C3.1
R901282909 PGH4-3X/050LR11VU2
R901147109 PGH4-3X/050RE11VE4
R901147104 PGH4-3X/050RE11VU2
R901147104 PGH4-30/050RE11VU2
R901296757 PGH4-3X/050RE11WU2
R901433870 PGH4-3X/050RE11WU2-A520
R901147114 PGH4-3X/050RR11VU2
R901464965 PGH4-3X/050RR11VU2-A525
R901274915 PGH4-3X/050RR11WU2
R901357192 PGH4-3X/063LR11VU2
R901286225 PGH4-3X/063RE11VE4
R901286223 PGH4-3X/063RE11VU2
R901385321 PGH4-3X/063RE11WU2
R901286226 PGH4-3X/063RR11VU2
R901463362 PGH4-3X/063RR11WU2
R901260687 PGH5-3X/063LR11VU2
R901147122 PGH5-3X/063RE11VE4
R901147115 PGH5-3X/063RE11VU2
R901147115 PGH5-30/063RE11VU2
R901147129 PGH5-3X/063RR11VU2
R901423306 PGH5-3X/063RR11VU2-A516
R901282739 PGH5-3X/063RR11WU2
R901260688 PGH5-3X/080LR11VU2
R901147123 PGH5-3X/080RE11VE4
R901443231 PGH5-3X/080RE11VE4-C3.1
R901147116 PGH5-3X/080RE11VU2
R901147116 PGH5-30/080RE11VU2
R901349823 PGH5-3X/080RE11VU2-A509
R901349331 PGH5-3X/080RE11WE4
R901369097 PGH5-3X/080RE11WU2
R901147130 PGH5-3X/080RR11VU2
R901443233 PGH5-3X/080RR11VU2-C3.1
R901296758 PGH5-3X/080RR11WU2
R901260689 PGH5-3X/100LR11VU2
R901412034 PGH5-3X/100LR11WU2
R901147124 PGH5-3X/100RE11VE4
R901147117 PGH5-3X/100RE11VU2
R901423214 PGH5-3X/100RE11WE4
R901325311 PGH5-3X/100RE11WU2
R901147131 PGH5-3X/100RR11VU2
R901423308 PGH5-3X/100RR11VU2-A516
R901296759 PGH5-3X/100RR11WU2
R901260690 PGH5-3X/125LR11VU2
R901376012 PGH5-3X/125LR11WU2
R901147125 PGH5-3X/125RE11VE4
R901147118 PGH5-3X/125RE11VU2
R901402689 PGH5-3X/125RE11VU2-C3.1
R901310644 PGH5-3X/125RE11WE4
R901147132 PGH5-3X/125RR11VU2
R901272915 PGH5-3X/125RR11WU2
R901260691 PGH5-3X/160LR11VU2
R901147126 PGH5-3X/160RE11VE4
R901430575 PGH5-3X/160RE11VE4-C3.1
R901147119 PGH5-3X/160RE11VU2
R901456396 PGH5-3X/160RE11VU2-C3.1
R901412925 PGH5-3X/160RE11WE4
R901225225 PGH5-3X/160RE11WU2
R901147133 PGH5-3X/160RR11VU2
R901430576 PGH5-3X/160RR11VU2-C3.1
R901272916 PGH5-3X/160RR11WU2
R901260692 PGH5-3X/200LR07VU2
R901147127 PGH5-3X/200RE07VE4
R901147120 PGH5-3X/200RE07VU2
R901371526 PGH5-3X/200RE07WE4
R901393396 PGH5-3X/200RE07WU2
R901147134 PGH5-3X/200RR07VU2
R901371525 PGH5-3X/200RR07WU2
R901260693 PGH5-3X/250LR07VU2
R901147128 PGH5-3X/250RE07VE4
R901147121 PGH5-3X/250RE07VU2
R901393397 PGH5-3X/250RE07WU2
R901147135 PGH5-3X/250RR07VU2
R901376638 PGH55-3X/080L-080RR11VU2
R901441118 PGH55-3X/080R-080RE11VE4
力士樂(lè)REXROTH內(nèi)嚙合齒輪泵PGM-4X系列
R901363096 PGM4-4X/025RA11VU2
R901374263 PGM4-4X/025RT11VU2
R901363097 PGM4-4X/032RA11VU2
R901374264 PGM4-4X/032RT11VU2
R901363098 PGM4-4X/040RA11VU2
R901374265 PGM4-4X/040RT11VU2
R901363099 PGM4-4X/050RA11VU2
R901374266 PGM4-4X/050RT11VU2
R901363100 PGM4-4X/063RA11VU2
R901374267 PGM4-4X/063RT11VU2
力士樂(lè)REXROTH恒位移擺線泵PGZ
R901230020 PGZ4-1X/020RA07VE4
R901384154 PGZ4-1X/020RA07VE4-C3.1
R901253320 PGZ4-1X/020RA07VU2-A485
R901230023 PGZ4-1X/020RR07VB3
R901230022 PGZ4-1X/020RT07VB2
R901230021 PGZ4-1X/020RT07VU2
R901230024 PGZ4-1X/032RA07VE4
R901388516 PGZ4-1X/032RA07VE4-C3.1
R901370661 PGZ4-1X/032RA07VU2-A485
R901230026 PGZ4-1X/032RT07VB2
R901230025 PGZ4-1X/032RT07VU2
R901230028 PGZ4-1X/040RA07VE4
R901252670 PGZ4-1X/040RA07VU2-A485
R901230031 PGZ4-1X/040RR07VB3
R901230030 PGZ4-1X/040RT07VB2
R901230029 PGZ4-1X/040RT07VU2
R901230032 PGZ4-1X/050RA07VE4
R901424383 PGZ4-1X/050RA07VE4-C3.1
R901370663 PGZ4-1X/050RA07VU2-A485
R901230035 PGZ4-1X/050RR07VB3
R901230034 PGZ4-1X/050RT07VB2
R901230033 PGZ4-1X/050RT07VU2
R901230036 PGZ4-1X/063RA07VE4
R901448430 PGZ4-1X/063RA07VE4-C3.1
R901300848 PGZ4-1X/063RA07VU2-A485
R901230039 PGZ4-1X/063RR07VB3
R901230038 PGZ4-1X/063RT07VB2
R901230037 PGZ4-1X/063RT07VU2
R901230040 PGZ4-1X/080RA07VE4
R901448257 PGZ4-1X/080RA07VE4-C3.1
R901253321 PGZ4-1X/080RA07VU2-A485
R901230043 PGZ4-1X/080RR07VB3
R901230042 PGZ4-1X/080RT07VB2
R901230041 PGZ4-1X/080RT07VU2
R901230044 PGZ5-1X/063RA07VE4
R901370655 PGZ5-1X/063RA07VU2-A485
R901382069 PGZ5-1X/063RA07WE4-A513
R901230047 PGZ5-1X/063RR07VB3
R901230046 PGZ5-1X/063RT07VB2
R901230045 PGZ5-1X/063RT07VU2
R901230048 PGZ5-1X/080RA07VE4
R901243999 PGZ5-1X/080RA07VE4-A481
R901267561 PGZ5-1X/080RA07VE4-A493
R901271005 PGZ5-1X/080RA07VU2-A485
R901382070 PGZ5-1X/080RA07WE4-A513
R901230051 PGZ5-1X/080RR07VB3
R901230050 PGZ5-1X/080RT07VB2
R901230049 PGZ5-1X/080RT07VU2
R901230052 PGZ5-1X/100RA07VE4
R901377959 PGZ5-1X/100RA07VE4-C3.1
R901253322 PGZ5-1X/100RA07VU2-A485
R901230054 PGZ5-1X/100RT07VB2
R901230053 PGZ5-1X/100RT07VU2
R901230056 PGZ5-1X/140RA07VE4
R901388517 PGZ5-1X/140RA07VE4-C3.1
R901370597 PGZ5-1X/140RA07VU2-A485
R901230058 PGZ5-1X/140RT07VB2
R901230057 PGZ5-1X/140RT07VU2
力士樂(lè)REXROTH葉片泵
力士樂(lè)REXROTH可調(diào)葉片泵，先導(dǎo)操縱PV7...C/D/N/W
R901320916 PV7-1X/10-14RE01MC0-08-A474
R900580381 PV7-1X/10-14RE01MC0-16
R987046360 PV7-1X/10-14RE01MC0-16LIM.15LT1450G.
R987047421 PV7-1X/10-14RE01MC0-16LIM.16LT/MIN
R987065905 PV7-1X/10-14RE01MC0-16+ZFS11/22,5R213
R987072161 PV7-1X/10-14RE01MC0-16+ZFS11/8R213
R900533851 PV7-1X/10-14RE01MC0-16-A184
R901358374 PV7-1X/10-14RE01MC0-16-P100
R901382678 PV7-1X/10-14RE01MC0-16-P125Q8
R901171150 PV7-1X/10-14RE01MC0-16-P140Q10
R900941071 PV7-1X/10-14RE01MC0-16-P45
R900941073 PV7-1X/10-14RE01MC0-16-P60Q15
R901442350 PV7-1X/10-14RE01MC0-16-P60Q20
R901414295 PV7-1X/10-14RE01MC0-16-P80Q20
R901344755 PV7-1X/10-14RE01MC0-16-P90
R900598753 PV7-1X/10-14RE01MC3-16
R900520401 PV7-1X/10-14RE01MC5-16
R901394361 PV7-1X/10-14RE01MC5-16WG
R900933324 PV7-1X/10-14RE01MC5-16WH
R901010430 PV7-1X/10-14RE01MC6-16
R900509053 PV7-1X/10-14RE01MC7-16
R900504653 PV7-1X/10-14RE01MD0-16
R900548512 PV7-1X/10-14RE01MD0-16-A234
R901404893 PV7-1X/10-14RE01MD0-16-Q15
R900520725 PV7-1X/10-14RE01MD3-16
R900520787 PV7-1X/10-14RE01MD5-16
R900537419 PV7-1X/10-14RE01MN0-16
R900772792 PV7-1X/10-14RE01MW0-16
R901136642 PV7-1X/10-14RE01MW0-16WG
R900741002 PV7-1X/10-14RE01MW0-16WH
R900534143 PV7-1X/10-20RE01MC0-10
R987179771 PV7-1X/10-20RE01MC0-10HAMERSLAGGRIJS
R901292147 PV7-1X/10-20RE01MC0-10-A497
R901388556 PV7-1X/10-20RE01MC0-10-P30Q25
R900941072 PV7-1X/10-20RE01MC0-10-P45
R901404630 PV7-1X/10-20RE01MC0-10-P70Q28
R987067707 PV7-1X/10-20RE01MC010+1PF2G2-4X/08RR20MR
R987074006 PV7-1X/10-20RE01MC010+AZPF-11-008RRR20MB
R987136850 PV7-1X/10-20RE01MC010+R4/1,00-450WG01M01
R900538125 PV7-1X/10-20RE01MC3-10
R901303349 PV7-1X/10-20RE01MC3-10-A497
R900539710 PV7-1X/10-20RE01MC5-10
R900738663 PV7-1X/10-20RE01MC5-10WG
R900247239 PV7-1X/10-20RE01MC5-10WH
R900908540 PV7-1X/10-20RE01MC7-10
R900931507 PV7-1X/10-20RE01MC7-10WH
R900906584 PV7-1X/10-20RE01MD0-10
R900782498 PV7-1X/10-20RE01MD0-10-A234
R900700454 PV7-1X/10-20RE01MD5-10
R901043560 PV7-1X/10-20RE01MW0-10WH
R987067102 PV7-1X/100-118RE07MC0+ PV7-63-71RE07MC0
R987068626 PV7-1X/100-118RE07MC0+ PV7-63-71RE07MC0
R900506809 PV7-1X/100-118RE07MC0-16
R987074658 PV7-1X/100-118RE07MC0-16LIM83CC.
R987062892 PV7-1X/100-118RE07MC0-16LIM.80CC.
R987072990 PV7-1X/100-118RE07MC0-16+16-20RE01MC0-16
R987066407 PV7-1X/100-118RE07MC0-16+20-25RA01MA0-05
R987070001 PV7-1X/100-118RE07MC0-16+25-30RE01MC0-16
R901432834 PV7-1X/100-118RE07MC0-16-P110
R901396331 PV7-1X/100-118RE07MC0-16-P120
R901404632 PV7-1X/100-118RE07MC0-16-P65Q160
R900511215 PV7-1X/100-118RE07MC3-16
R900516546 PV7-1X/100-118RE07MC5-16
R900950061 PV7-1X/100-118RE07MC5-16WG
R900556803 PV7-1X/100-118RE07MC5-16WH
R901183579 PV7-1X/100-118RE07MC5-16WH-P125Q116
R900961521 PV7-1X/100-118RE07MC6-16
R987066964 PV7-1X/100-118RE07MC6-16+100-118RE07MC6*
R900533637 PV7-1X/100-118RE07MC7-16
R901348138 PV7-1X/100-118RE07MC7-16WG
R900752351 PV7-1X/100-118RE07MC7-16WH
R987065682 PV7-1X/100-118RE07MCO+V5-1X-193/RJ15DMC
R900532770 PV7-1X/100-118RE07MD0-16
R900950419 PV7-1X/100-118RE07MD0-16-A234
R900771631 PV7-1X/100-118RE07MD0-16-A427
R901398834 PV7-1X/100-118RE07MD0-16-A517
R901400470 PV7-1X/100-118RE07MD0-16-P30Q165-A517
R901404706 PV7-1X/100-118RE07MD0-16-Q120
R987066526 PV7-1X/100-118RE07MD016+V1-1X/036RJ15UMB
R901101367 PV7-1X/100-118RE07MD3-16
R900949187 PV7-1X/100-118RE07MD6-16
R900928704 PV7-1X/100-118RE07MN0-16
R900519411 PV7-1X/100-118RE07MN5-16
R901061279 PV7-1X/100-118RE07MW0-16WG
R901429723 PV7-1X/100-118RE07MW0-16WG-P30P100Q120
R900740824 PV7-1X/100-118RE07MW0-16WH
R901404633 PV7-1X/100-118RE07MW0-16WH-P20P70Q160
R901413656 PV7-1X/100-118RE07MW5-16WG-P20P80Q170
R901129340 PV7-1X/100-118RE07MW6-16WH
R900561846 PV7-1X/100-150RE07MC0-08
R900973548 PV7-1X/100-150RE07MC0-08-A184
R901047738 PV7-1X/100-150RE07MC0-08-A446
R901173632 PV7-1X/100-150RE07MC0-08-A464
R901384145 PV7-1X/100-150RE07MC0-08-C3.1
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液壓傳動(dòng)技術(shù)在機(jī)械中的應(yīng)用.
驅(qū)動(dòng)機(jī)械運(yùn)動(dòng)的機(jī)構(gòu)以及各種傳動(dòng)和操縱裝置有多中形式。根據(jù)所用的不見(jiàn)和零件，可分為機(jī)械的、電氣的、氣動(dòng)的、液壓的傳動(dòng)裝置。經(jīng)常還將不同的形式組合起來(lái)運(yùn)用一四位一體。由于液壓傳動(dòng)具有很多優(yōu)點(diǎn)，使這種新技術(shù)發(fā)展的很快。液壓傳動(dòng)應(yīng)用與金屬切割機(jī)床也不過(guò)四五十年的歷史。航空工業(yè)在1930年以后才開(kāi)始采用。特別是近二三十年一來(lái)液壓技術(shù)在各種工業(yè)中的應(yīng)用越來(lái)越廣泛。
1、在機(jī)床上，液壓傳動(dòng)常應(yīng)用在以下的- -些裝置中
1.1進(jìn)給 傳動(dòng)裝置磨床砂輪架和工作臺(tái)的進(jìn)給運(yùn)動(dòng)大部分采用液壓傳動(dòng);車(chē)床、六角車(chē)床、自動(dòng)車(chē)床的刀架或轉(zhuǎn)塔刀架，銑床、刨床、組合機(jī)床的工作臺(tái)等的進(jìn)給運(yùn)動(dòng)也都采用液壓傳動(dòng)。這些部件有的要求快速移動(dòng)，有的要求慢速移動(dòng)。有的既要求快速移動(dòng)，也要求慢速移動(dòng)。這些運(yùn)動(dòng)多半要求有較大的調(diào)速范圍，要求在工作中無(wú)級(jí)調(diào)速;有的要求持續(xù)進(jìn)給，有的要求間歇進(jìn)給;有的要求在負(fù)載變化下速度恒定，有的要求有良好的換向性能等等。所有這些要求都是可以用液壓傳動(dòng)來(lái)實(shí)現(xiàn)的。
1.2往復(fù)主題運(yùn)動(dòng)傳動(dòng)裝置龍i刨床的工作臺(tái)、牛頭刨床或插床的滑枕，由于要求作高速往復(fù)直線運(yùn)動(dòng)并且要求換向沖擊小、換向時(shí)間短、能耗低，因此都可以采用液壓傳動(dòng)。
1.3仿形裝置車(chē)床、銑床、刨床上的仿形加工可以采用液壓伺服系統(tǒng)來(lái)完成。起精度可達(dá)0.01-0. 02m。此外，磨床上的成型砂輪修正裝置亦可采用這系統(tǒng)。
1.4 輔助裝置機(jī)床上的夾緊裝置、齒輪箱變速操縱裝置、絲桿螺母間隙消除裝置、垂直移動(dòng)部件平衡裝置、分度裝置、工件和刀具裝卸裝置、工件輸送裝置等，采用液壓傳動(dòng)，有利于簡(jiǎn)化機(jī)床結(jié)構(gòu)，提高機(jī)床自動(dòng)化程度。
1.5靜壓支承重型機(jī)床、高速機(jī)床、高精度機(jī)床上的軸承、導(dǎo)軌、絲桿螺母機(jī)構(gòu)等處采用液壓靜支承后，可以提高工作平穩(wěn)性和運(yùn)動(dòng)精度。
2、液壓傳動(dòng)技術(shù)在工程機(jī)械行走驅(qū)動(dòng)中的應(yīng)用
行走驅(qū)動(dòng)系統(tǒng)是工程機(jī)械的重要組成部分。與工作系統(tǒng)相比，行走驅(qū)動(dòng)系統(tǒng)不僅需要傳輸更大的功率，要求器件具有更高的效率和更長(zhǎng)的壽命，還希望在變速調(diào)速、差速、改變輸出軸旋轉(zhuǎn)方向及反向傳輸動(dòng)力等方面具有良好的能力。于是，采用何種傳動(dòng)方式，如何更好地滿足各種工程機(jī)械行走驅(qū)動(dòng)的需要，-直是工程機(jī)械行業(yè)所要面對(duì)的課題。尤其是近年來(lái)，隨著我國(guó)交通、能源等基礎(chǔ)設(shè)施建設(shè)進(jìn)程的快速發(fā)展，建筑施工和資源開(kāi)發(fā)規(guī)模不斷擴(kuò)大，工程機(jī)械在市場(chǎng)需求大大增強(qiáng)的同時(shí)，更面臨著作業(yè)環(huán)境更為苛刻、工沉條件更為復(fù)雜等所帶來(lái)的挑戰(zhàn)，也進(jìn)一步推動(dòng)著對(duì)其行走驅(qū)動(dòng)系統(tǒng)的深入研究。

液壓傳動(dòng)是一種可達(dá)到傳遞動(dòng)力、增加動(dòng)力、改變速比等目的的傳動(dòng)方式。液壓傳動(dòng)是以液體為工作介質(zhì)，靠處于密閉容器內(nèi)的液體靜壓力來(lái)傳遞力的傳動(dòng)方式，靜壓力的大小取決于負(fù)載，而負(fù)載速度的傳遞是按液體容積變化相等的原則進(jìn)行的，其速度大小取決于流量；如果忽略損失，液壓傳動(dòng)所傳遞的力與速度無(wú)關(guān)。
液壓傳動(dòng)相比其他傳統(tǒng)傳動(dòng)方式優(yōu)勢(shì)較為明顯：1）功率重量比大，能以較輕的設(shè)備重量取得更大的力和轉(zhuǎn)矩；2）慣性小，啟動(dòng)、制動(dòng)迅速；3）無(wú)級(jí)調(diào)速，調(diào)速范圍大，低速性能好；4）高響應(yīng)速度；5）高負(fù)載剛度；6）可控性好，易于實(shí)現(xiàn)自動(dòng)化，液壓元件位臵可以根據(jù)設(shè)備需要進(jìn)行調(diào)整。