力士乐油泵结构原理.ppt

Hydraulic pump trainingHydraulic pump training A11VLO190(260)LRDU2/11R A11VLO190(260)LRDU2/11R Sany Germany GmbHSany Germany GmbH Huiping DaiHuiping Dai© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.2A11VLO一、油泵的组成结构1.壳体 2.回转体总成（主轴及轴承，缸体，柱塞，斜盘，月牙轴承，回 程盘，配流盘，球铰及蝶形弹簧） 3.后盖(增压泵) 4.控制阀、控制活塞 5.密封件© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.3A11VLO最小排量螺钉柱塞斜盘壳体前轴承主轴轴封月牙轴承 蝶形弹簧球铰最大排量螺钉后盖增压泵后轴承配流盘控制阀缸体回程盘滑靴© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.4A11VLO二、各组成部分的功能1.壳体 2.回转体总成（主轴及轴承，缸体，柱塞，斜盘，月牙轴承，回程 盘，配流盘，球铰及蝶形弹簧） 3.后盖 4.控制阀、控制活塞 5.密封件© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.5A11VLO三、A11VLO190或260LRDU2的工作原理M1的压力在0-120bar© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.6A11VLO电例 1是电比例电流在400-1200ma,2是200-600ma在比例电磁阀与阀座之间调 节螺钉为一个内六角,调节比 例电磁阀的起始位置,当比例 电磁铁上通200的电流,无排 量是拧松,排量过大时拧紧.© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.7A11VLO四、控制阀设定值的计算与调节1. 恒功率的基本计算公式工作压力© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.8A11VLO2. 恒功率的调节步骤 i.在M1口接测压表(0~160bar以上量程) ii.压力切断值调至足够高，恒功率调节螺钉拧至足够高，系统溢流 阀调至最低； iii.电比例排量在最大 iv.系统憋压(对混凝土泵送机械可点动憋缸)； v.提高系统溢流阀的设定至计算变量点压力； vi.逐渐拧出恒功率设定螺钉(即减小恒功率设定值)，同时观察M1口 压力从无至有的变化，待此压力开始出现时锁定恒功率调节的设定点 即可； vii.重复憋几次缸，检查系统压力和M1压力∆p(Q驱动功率=qv每分钟排量 .∆p/600)，确保调节设定的准确。

© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.9A11VLO3.压力切断的设定© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.10A11VLO常见的可能引起A11VLO油泵损坏的原因1.启动油泵前未在壳体内注油； 2.油箱液位过低(常可在吸油管部位听到噪声)； 3.吸油口加过滤器而过滤器堵塞或长久不换,或吸油管太细，在吸油口可 测到负压-0.2bar以下； 4.油液黏度较高，转速过高且油泵经常工作在大排量下，在吸油口可测 到负压-0.2bar以下； 5.系统油液颗粒污染度超标，并为耐磨颗粒； 6. 油泵长时间工作在低压(10bar)大排量工况下； 7. 壳体背压过高(轴封漏油)： 泄漏管过细，加装了背压高的单向阀，或 与其他背压高的管路接到一起等。

相应维护时应避免以上现象© All rights reserved by Bosch Rexroth AG, even and especially in cases of proprietary rights applications.We also retain sole power of disposal, including all rights relating to copying, transmission and dissemination.A4VG机械调零11。