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DBW10B25X/315U6EW230N9K4E5L液压泵的工作原理图。柱塞2依靠弹簧4压在偏心轮1上,偏心轮转动时,柱塞便作往复运动。柱塞向右移动时,密封腔因容积增大而形成一定真空,在大气压力作用下通过单向阀5从油箱吸进油液,这时单向阀6封闭压油口防止系统油液回流;柱塞向左移动时,密封腔4容积减小,将已吸入的油液通过单向阀6压出,这时单向阀5封闭吸油口防止油液流回油箱。偏心轮不停地转动,泵就不断地吸油和压油。由此可见液压泵是靠密封容积变化进行工作的,故常称其为容积式泵。单向阀5和6是液压泵正常吸油和压油所必须的配油装置。液压泵的工作原理及主要结构特点 类型 结构、原理示意图 工作原理 结构特点 外啮合齿轮泵 当齿轮旋转时,在A腔,由于轮齿脱开使容积逐渐增大,形成真空从油箱吸油,随着齿轮的旋转充满在齿槽内的油被到B腔,在B腔,由于轮齿啮合,容积逐渐减小,把液压油排出 利用齿和泵壳形成的封闭容积的变化,完成泵的功能,不需要配流装置,不能变量 结构、价格低、径向载荷大 内啮合齿轮泵 当传动轴带动外齿轮旋转时,与此相啮合的内齿轮也随着旋转。吸油腔由于轮齿脱开而吸油,经隔板后,油液进入压油腔,压油腔由于轮齿啮合而排油 典型的内啮合齿轮泵主要有内齿轮、外齿轮及隔板等组成 利用齿和齿圈形成的容积变化,完成泵的功能。在轴对称位置上布置有吸、排油口。不能变量 尺寸比外啮合式略小,价格比外啮合式略高,径向载荷大 德国力士乐液压泵DBW10B25X/315U6EW230N9K4E5L叶片泵 转子旋转时,叶片在离心力和压力油的作用下,尖部紧贴在定子内表面上。这样两个叶片与转子和定子内表面所构成的工作积,先由小到大吸油后再由大到小排油,叶片旋转一周时,完成两次吸油和两次排油 利用插入转子槽内的叶片间容积变化,完成泵的用。在轴对称位置上布置有两组吸油口和排油口 径向载荷小,噪声较低流量脉动小 柱塞泵 柱塞泵由缸体与柱塞构成,柱塞在缸体内作往复运动,在工作容积增大时吸油,工作容积减小时排油。采用端面配油 径向载荷由缸体外周的大轴承所平衡,以限制缸体的倾斜 利用配流盘配流 传动轴只传递转矩、轴径较小。由于存在缸体的倾斜力矩,制造精度要求较高,否则易损坏配流盘 螺杆泵 一根主动螺杆与两根从动螺杆相互啮合,三根螺杆的啮合线把螺旋槽分割成若干个密封容积。当螺杆旋转时,这个密封容积沿轴向移动而实现吸油和排油 利用螺杆槽内容积的移动,产生泵的作用。 德国力士乐液压泵DBW10B25X/315U6EW230N9K4E5L液压泵的工作原理如图3.1 所示,泵体3 和柱塞2 构成一个密封容积,偏心轮1 由原动机带动旋转,当偏心轮由图示位置向下转半周时,柱塞在弹簧6 的作用下向下移动,密封容积逐渐增大,形成局部真空,油箱内的油液在大气压作用下,顶开单向阀4 进入密封腔中,实现吸油;当偏心轮继续再转半周时,它推动柱塞向上移动,密封容积逐渐减小,油液受柱塞挤压而产生压力,使单向阀4 关闭,油液顶开单向阀5 而输入系统,这就是压油,液压泵的供油压力为p,供油流量为q。液压泵都是依靠密封容积变化的原理来进行工作的,故一般称为容积式液压泵,图3-1所示的是一单柱塞液压泵的工作原理图,图中柱塞2装在缸体3中形成一个密封容积a,柱塞在弹簧4的作用下始终压紧在偏心轮1上。原动机驱动偏心轮1旋转使柱塞2作往复运动,使密封容积a的大小发生周期性的交替变化。当a有小变大时就形成部分真空,使油箱中油液在大气压作用下,经吸油管顶开单向阀6进入油箱a而实现吸油;反之,当a由大变小时,a腔中吸满的油液将顶开单向阀5流入系统而实现压油。这样液压泵就将原动机输入的机械能转换成液体的压力能,原动机驱动偏心轮不断旋转,液压泵就不断地吸油和压油。 德国力士乐液压泵DBW10B25X/315U6EW230N9K4E5L2.液压泵的特点 单柱塞液压泵具有一切容积式液压泵的基本特点: (1)具有若干个密封且又可以周期性变化空间。液压泵输出流量与此空间的容积变化量和单位时间内的变化次数成正比,与其他因素无关。这是容积式液压泵的一个重要特性。 (2)油箱内液体的压力必须恒等于或大于大气压力。这是容积式液压泵能够吸入油液的外部条件。因此,为液压泵正常吸油,油箱必须与大气相通,或采用密闭的充压油箱。 (3)具有相应的配流机构,将吸油腔和排液腔隔开,液压泵有规律地、连续地吸、排液体。液压泵的结构原理不同,其配油机构也不相同。如图3-1中的单向阀5、6就是配油机构。 容积式液压泵中的油腔处于吸油时称为吸油腔。吸油腔的压力决定于吸油高度和吸油管路的阻力,吸油高度过高或吸油管路阻力太大,会使吸油腔真空度过高而影响液压泵的自吸能力;油腔处于压油时称为压油腔,压油腔的压力则取决于外负载和排油管路的压力损失,从理论上讲排油压力与液压泵的流量无关。 容积式液压泵排油的理论流量取决于液压泵的有关几何尺寸和转速,而与排油压力无关。但排油压力会影响泵的内泄露和油液的压缩量,从而影响泵的实际输出流量,所以液压泵的实际输出流量随排油压力的升高而降低。 液压泵按其在单位时间内所能输出的油液的体积可调节而分为定量泵和变量泵两类;按结构形式可分为齿轮式、叶片式和柱塞式三大类。 4WRDE32V1-600L-5X/6L24K9/WG152M 4WRDE32E1-600L-5X/6L24EK9/M 4WRDE25V1-350L-5X/6L24K9/WG152MR 4WRDE25V1-350L-5X/6L24K9/WG152MR 4WRDE25V1-350L-5X/6L24EK9/WG152MR 4WRDE25V000S-5X/6L15K9/VR-599 4WRDE25E1-220L-5X/6L24TK9/WG152M-280 4WRDE16W200L-5X/6L24K9/M 4WRDE16W1-200L-5X/6L24EK9/M 4WRDE16Q200L-5X/6L24EZ9/MR 4WRDE10V25L-5X/6L24Z9/M-280 4WRDE10V100L-5X/6L24K9/WG152MR 4WRDE10E50L-5X/6L24ETK9/WG152M 4WRD10W1-100L5X/6L24EK6/WG021MS 4WRAP6W7-08-2X/24K4/M 4WRAP6W7-07-3X/G24K4/M 4WRAP6W7-07-2X/24K4/M 4WRAP6W7-04-3X/G24K4/M 4WRAP6W7-04-2X/24K4/M 4WRAP6W7-02-3X/G24K4/M 4WRAP6W7-02-2X/24K4/M 4WRAE6WA30-2X/G24N9K31/A1V 4WRAE6WA30-2X/G24N9K31/A1V 4WRAE6W30-2X/G24N9K31/F1V 4WRAE6W30-2X/G24N9K31/A1V 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Z2SRK6-1-1X/V C0RE Z2S6B1-6X/ Z2S6-1-6X/ Z2S4-1-1X/ Z2S22B1-5X/V Z2S16B3-5X/ Z2S16-4-5X/ Z2S16-1-5X/V Z2S10B2-3X/ Z2S10B1-3X/ Z2FSK10-2-1X/2QV Z2FS6A2-4X/2Q Z2FS10B3-3X/S2V Z2FS10A5-3X/S2V Z2FS10A3-3X/S2V Z2FS10-5-3X/V C0RE Z2DBK6VD2-1X/210V Z2DBK6VD2-1X/100V Z2DB6VC3-4X/100 Z2DB6VC1-4X/200V Z2DB16VD2-2X/200 Z2DB16VD2-2X/100 Z1S6P1-3X/ Z1S6D1-3X/V Z1S6C2-3X/V Z1S16P1-1X/V Z14 GDM 3011 PLUG C0RE ZDRK6VP5-1X/100YMV ZDRK10VB5-1X/100YV ZDRK10VA5-1X/210YV ZDR6DP7-4X/25YM ZDR6DP2-4X/75YMV ZDR6DP1-4X/210YMV ZDR6DP1-4X/210YM ZDR6DB2-4X/150YMV ZDR6DA2-4X/75Y ZDR6DA2-4X/150Y ZDR10VP5-3X/315YM ZDR10VP4-3X/200YM ZDR10VP4-3X/100YM ZDR10VB5-3X/50Y ZDR10DP2-5X/210YM ZDR10DP1-5X/210YM ZDR10DB1-5X/210YM ZDR10DA3-5X/75Y ZDR10DA2-5X/25Y ZDR10DA2-5X/150YV ZDR10DA1-5X/25Y ZDC32P-2X/M ZDB6VP1-4X/315V ZDB6VP1-4X/200 ZDB10VA2-4X/315 ZDB10VA2-4X/100V ZBE03 Z45(B) GDM2012-RE-SW *BG Z2S6-2-6X/V Z2S10-1-3X/S030 Z2FS6A7-4X/2QV Z2FS6A2-4X/2QV Z2FS6-2-4X/2Q Z2FS6-2-4X/1Q Z2DB22VD3-2X/100 Z2DB10VD2-4X/100V Z2DB10VC2-4X/50V Z1S6F1-3X/VW4 Z1S6A1-3X/V Z1S10F1-3X/V ZDR10VB5-3X/200Y ZDR10VB4-3X/100Y ZDR10DP1-5X/25YM ZDR10DA7-5X/75Y ZDC16P2X/XM ZDBK6VA2-1X/100V ZDBE6VP1-1X/100G24K4M ZDB6VP2-4X/100 ZDB6VP1-4X/315V ZDB6VB2-4X/50V ZDB6VB2-4X/200 ZDB6VA2-4X/315V ZDB6VA2-4X/315 ZDB6VA2-4X/100V ZDB10VA2-4X/200V Z5L PLUG 12-240V AC/DC Z4WEH16E63-5X/6EG24N9ETK4 Z2S6-1-6X/V Z2S6-1-6X/ C0RE Z2S22A1-5X/ Z2S22-1-5X/ C0RE Z2S16B1-5X/V Z2S16-2-5X/V Z2S10B4-3X/ Z2S10A2-3X/V Z2S10-4-3X/ Z2FS6B2-4X/2Q Z2FS4-2-1X/2QV Z2FS10B3-3X/SV Z2FS10A7-3X/S2V Z2FS10A5-3X/S2V Z2FS10-7-3X/V Z2DB6VD2-4X/315V Z2DB6VC2-4X/100 Z2DB6VC1-4X/100V Z2DB10VC1-4X/100 Z1SRA15F1-1X/M Z1S10D1-3X/V Z2DB6VC1-4X/315V Z2DB10VD2-4X/200V Z2DB10VC1-4X/100V Z1SRA40F2-1X/V 4X2TH6L06 101/1M 4WSE3EE32-4X/1000B8-315K9DV-107 4WSE3EE32-4X/1000B8-315K9DV-107 4WSE3EE32-4X/1000B8-315K9DV 4WSE3EE25-2X/500B8-315K9EV 4WSE3EE25-2X/500B8-315K9DV 4WSE3EE25-2X/500B8-315K9DV 4WSE3EE25-2X/300B9E315K9EV 4WSE3EE16-1X/300B8-210K9DV 4WSE3EE16-1X/300B8-210K9DV 4WSE3EE16-1X/200B8T315K9EV 4WSE3EE16-1X/200B8-315K9DV 4WSE3EE16-1X/100B9-315K9EV 4WSE2EM6-2X/20B9ET315K17EV 4WSE2EM10-5X/45B9T315K31EV 4WSE2EM10-5X/20B9T315K31EV 4WS2EM6-2X/20B11ET315K17EV 4WS2EM6-2X/15B11ET210K17EV 4WS2EM6-2X/10B8ET210K17EV 4WS2EM6-2X/10B11ET210K17EV 4WS2EM6-1X/20F12ET315K17EV 4WS2EM10-5X/75B11ET315K31EV 4WS2EM10-5X/60B11ET315K31EV 4WS2EM10-5X/30B11ET315K31EV 4WS2EM10-5X/20B11ET315K31EV 4WS2EM10-4X/75B3ET315K8EV 4WS2EM10-4X/60B2ET315Z8AM 4WS2EM10-4X/5B2ET315K8EV 4WS2EM10-4X/45B2ET315K8DM 4WS2EM10-4X/45B2ET315K8DM 4WS2EM10-4X/45B2ET315K8AM 4WS2EM10-4X/45B2ET315K8AM 4WS2EM10-4X/30B2ET315K8DM 4WS2EM10-4X/20B2ET315K8DM 4WS2EM10-4X/20B2ET315K8DM 4WS2EM10-4X/10B2ET315Z8BM 4WS2EM10-4X/10B2ET315K8EV 4WREE6WA32-2X/G24K31/A1V 4WREE6WA32-2X/G24K31/A1V 4WREE6W32-2X/G24K31/A1V 4WREE6W32-2X/G24K31/A1V 4WREE6W16-2X/G24K31/A1V 4WREE6W1-16-2X/G24K31/A1V 4WREE6W08-2X/G24K31/A1V 4WEH16HC7X/0F6EG24N9EK4 4WEH16HC7X/0F6EG220N9K4 4WEH16HC7X/0F6EG220N9ETK4/B10 4WEH16H7X/6EG48N9ETK4/B10P4.5 4WEH16H7X/6EG24N9ETK4 4WEH16H7X/6EG24N9EK4 4WEH16G7X/6EG24N9SK4/P4.5 4WEH16G7X/6EG24N9K4/P4.5 DBDS6P18/315 DBDS10P-10/315  DBDS10P10/315 DBDH10G/0/20 4WE6D62/0FEG24N9K4 DBE10-5X/200YG24K4M DRE10-5X/200YMG24K4M 2FRE6B-2X/25QK4MV 4WRL16V1120M-3X/G24K0-M-750 ZDRE10VP1-1X/315XLMG24NK4M DREPV6C-10/25P10AG24NK4M 4WRZ10E25-7X-6EG24ETK4/D3M ZDR6DP0-4X/40YMN80 2FRM-6-B-36-31/32-QRV HED10A12X/200K41G24/1/V VT3002-2X/15H PGH4-2X/040RE11VU2 A10VS0140DFEE 71DR 71DFEE R900909367 4WREE6V08-2X/G24K31/A1V HED30A36/200K DBW10B-2-5X/315 Z2DB10VD2-4X/315V DBDS10PIX/330BT ZDR6DA2-4X210Y ZDR10DP2-5X/210YM ZDR6DB2-4X/200Y Z2FS6-2-4X/2QV Z4S10-3X 2FRM16-3X/100LB 4WE6D6X/EG24N9K4 M-3SEW6C36/420MG24N9K4 M-Z4SEH10E1X/3CG24ETK4-S04 4WEH16HD7X/0F6EG24N9ETK4 M-3SED6UK1X/350CG24N9K4 SL100A1-42 Z2S22B1-5X 0811000020 4WRZ25W6-325-7X6EG24N9ETK4/D 比例减压阀 2FRM10-3X/50LB 二通流量控制阀 ZFRM16-3X/100LB 二通流量控制阀 ZFRM16-3X/160LB 二通流量控制阀 ZFRM6B3-6-3X/16QR 二通流量控制阀 4WE10D-3X/CG24N9K4 电磁换向阀 4WE10D-3X/0FCG24N9K4 电磁换向阀 4WE10J-3XCGN9K4 电磁换向阀 4WE6D-6X/EGN9K4 电磁换向阀 4WE6D-6X/0FEGN9K4 电磁换向阀 4WE6J-6X/EGN9K4 电磁换向阀 4WE6Y-6X/EGN9K4 电磁换向阀 4WEH16HD7X/0FEG24N9ETK4B10D3 电磁换向阀 84WEH16J-7X/6EG24N9ETK4B10D3 电磁换向阀 4WEH16J-7X/6EG24N9K4B10D3 电磁换向阀 4WEH16Y-7X6EG24N9ETK4B10D3 电磁换向阀 4WEH16Y-7X6EG24N9K4B10D3 电磁换向阀 4WMM6J-5X 手动换向阀 4WRA6W130-2X/G24K4/F1 4WRA6W30-2X/G24K/F1 比例换向阀 Z2FS10-5-3X双单向节流阀 4WE6D6X/SG24N9K4 Z4 LED HED80A1X/350K14 4WRZ10W8-85-7X/6EG24N9K4/F1D 比例换向阀 4WRZ16W8-150-7X6EG24N9K4/F1 比例换向阀 4WRZ25W8325-7X/6EG24N9K4/F1 比例换向阀 DBDS10P1X/315 直动式溢流阀 DBDS6P1X/315 4WE6H6X/EG24N9K4 电磁换向阀 4WRZE25W5-325-7X/6EG24N9ETK3/F 比例方向阀 4WRZE25W5-325-10/6EG24N9ETK3/F 比例方向阀 ZDR6DP2-45/40YMV W80 减压阀 3DREP6C-20=25EG24N9K4/M=00 比例电磁溢流阀 LC32A20E6X/ 插装阀 LFA32GWA-7X/P15 插装阀盖板 M-3SED6UK 13/350CG24N9K4 电磁换向阀 4WREE10W-75-22/G24K31/F1V 比例方向阀 DBDS20K18/50 先导式溢流阀 LC25A05E60/ 插装阀 LFA25WEA71/A15P15T15 插装阀盖板 UJ11Y/H/W-15 丝口柱塞阀(硬密封) 4WE6Q6X/EG24N9K4 电磁换向阀 DBEME10-5X/315YG24K31M 比例溢流阀 Z2S6-1-64 叠加式液控单向阀 Z2FS6-2-44/2Q/V 叠加式双单向溢流阀 ZDR6DA2-4X/150Y 减压阀 M3SEW6U24/315G24Z5L/B12 FD25FB20B04/200V ZDR6DA2-42/25-YM DBW10B2-52/200Y6AG24NZ4 A10VS0100 DG/31R-PSA12KB4 2FRM-6-B-36-31/32-QRV A10S045DR/31R-PSA12N00  A2VK12VA0R4G1PE1-S0 3DR16P5-5X/200Y/00M 4WRDE10V1-100L-5X/6L24TK9V 3DREME16P-62/200YG24K31V 4WEZE16W8-150-7X/6EG249ETK31/F1D3M 4WRZE10W8-85-7X/6EG24N9ETK31F1/D3M RVP20-10 4WE10E3X/CW220-50NZ5L 4WEH16J6X/6AW220-50NET/Z5L DBW20B2-5X/20W220-50NZ5L/2 Z2FS10-3X Z2S16-30 4WRA6W1-30-2X/G24N9K4/V
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