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。 上海明丰仓库大量现货博世力士乐中国 R901110456 HED8OA2X/200K14V R901108236 HED8OH2X/350K14AS R901108003 HED8OP2X/200K14AS R901107922 HED8OA2X/350K14SV R901107790 HED8OP2X/100K14AS R901107128 HED8OH2X/100K14A R901107126 HED8OA2X/200K14KS R901107093 HED8OP2X/200K14S R901107087 HED8OA2X/350K14KS R901107086 HED8OH2X/50K14AS R901106509 HED8OP2X/100K14S R901106505 HED8OH2X/100K14AS R901106504 HED8OP2X/50K14S R901106498 HED8OH2X/100K14KS R901106453 HED8OP2X/350K14 R901106452 HED8OA2X/200K14AS R901106449 HED8OP2X/630K14S R901106448 HED8OA2X/200K14KW R901106259 HED8OA2X/100K14A R901102754 HED8OA2X/50K14KW R901102747 HED8OP2X/100K14 R901102727 HED8OA2X/200K14S R901102721 HED8OP2X/200K14 R901102716 HED8OA2X/350K14KW 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HED2OA2X/100L220 R900449913 HED3OA3X/200KL24 R900449436 HED2OA2X/400L110 R900449422 HED1KA4X/350L24V R900449159 HED2OA2X/25L24 R900449121 HED3OA3X/100KL220 R900448891 HED1KA4X/500K R900448872 HED2OA2X/200L220 R900448807 HED3OA3X/400Q R900448708 HED2OA2X/200L110 R900448568 HED3OA3X/25K R900448441 HED2OA2X/400L220 R900448290 HED1KA4X/500L24 R900448100 HED3OA3X/400L24Q R900448039 HED1OA4X/100L110 R900448018 HED2OA2X/400KL220 R900447961 HED2OA2X/200KL110 R900447863 HED3OA3X/200L110 R900447862 HED2OA2X/25K R900447817 HED3OA3X/400L220 R900447300 HED2OA2X/100K R900446891 HED3OA3X/400L24 R900446818 HED2OA2X/25KL24 R900445818 HED2OA2X/25L220 R900445800 HED3OA3X/200L220 R900445230 HED2OA2X/63K R900444716 HED2OA2X/200KL220 R900444274 HED3OA3X/200Q R900444255 HED2OA2X/100 R900444254 HED2OA2X/63 R900444156 HED3OA3X/25 R900444123 HED3OA3X/100K R900444122 HED3OA3X/200K R900444121 HED2OA2X/25 R900444106 HED3OA3X/400KL220 R900444041 HED2OA2X/200K R900444009 HED3OA3X/200L24 R900443741 HED2OA2X/400L24 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R900380994 HED5OP22X/210K14 R900367896 HED3OA3X/400/12 R900340260 HED2OA2X/400SO6 R900336080 HED1OA4X/350KL24 R900248142 HED2OA2X/200K6L220 R900248139 HED2OA2X/63K6L24 R900247593 HED1OA4X/350K6 R900247521 HED2OA2X/200KL110/12 R900246841 HED3OA3X/63KL24 R900245037 HED3OA3X/400KQ R900244272 HED5OA12X/100K14V R900244157 HED3OA3X/400K6L24Q R900242688 HED2OA2X/63K6L24W21 R900242686 HED2OA2X/100K6L220 R900230982 HED1OA4X/350K6L24 R900230378 HED5OA22X/350K14 R900230086 HED1OA4X/100K6L24 R900230047 HED3OA3X/200KL110 R900229981 HED2OA2X/25K6 R900229877 HED5OP22X/210P140K14 R900228676 HED5OP12X/350K14V R900228237 HED2OA2X/25KL48 R900228081 HED2OA2X/200K6L48 R900227650 HED3OA3X/400K6L24 R900227649 HED2OA2X/25K6L24 R900227385 HED5OK12X/350K14 R900224893 HED2OA2X/63K6 R900224269 HED5OK12X/630K14 R900223774 HED3OA3X/25K6Q R900222850 HED1OA4X/350KV R900222506 HED2OA2X/100K6L24 R900222274 HED1KA4X/100U15 R900222166 HED2OA2X/400KL110 R900221792 HED3OA3X/100K6L24 R900221791 HED3OA3X/100K6 R900221668 HED2OA2X/100KL110 R900221665 HED1KA4X/350KL48 R900220812 HED1KA4X/350K6 R900220606 HED2OA2X/200KL48 R900220510 HED3OA3X/25K6L24 R900220325 HED2OA2X/200K6L24 R900219964 HED2OA2X/400K6 R900219963 HED2OA2X/200K6 R900219962 HED2OA2X/400KL110/12 R900219615 HED3OA3X/25K6 R900218945 HED5OP12X/210K14V R900218308 HED2OA2X/100KL220 R900218307 HED5OA12X/50K14V R900218306 HED5OA12X/210K14V R900218304 HED3OA3X/400K6 R900217913 HED3OA3X/200K6L110 R900216719 HED3OA3X/100K6Q R900216214 HED1KA4X/350KL110 R900212487 HED3OA3X/400K6L110 R900212220 HED2OA2X/400K6L24 R900209599 HED3OA3X/25KL24 R900209148 HED3OA3X/400K6L220Q R900208430 HED3OA3X/200K6L24 R900208108 HED5OP22X/350K14 R900207773 HED3OA3X/200K6 R900207699 HED3OA3X/63K6/12 R900206414 HED2OA2X/400K6L220 R900206413 HED2OA2X/25K6L220 R900204958 HED5OK12X/100K14 R900204957 HED5OK12X/50K14 R900203864 HED1OA4X/350KL110 R900062362 HED5OA12X/350K14 R900059123 HED3OA3X/100K6L220 R900058282 HED5OP12X/630K14 R900058051 HED5OP12X/100K14 R900571917 HED8OP1X/350K14S R900563879 HED8OH1X/200K14 R900536049 HED8OH1X/350K14 R900514952 HED5OA12X/50K14 R900466267 HED3OA3X/400KL24 R900457574 HED2OA2X/63L24 R900456950 HED2OA2X/200KL24 R900456417 HED5OP12X/210K14 R900451231 HED2OA2X/400KL24 R900444254 HED2OA2X/63 R900443175 HED2OA2X/200 R900442482 HED2OA2X/400 R900442202 HED3OA3X/400K R900442140 HED3OA3X/100 R900442022 HED2OA2X/200L24 R900441948 HED3OA3X/200KL220 R900441785 HED3OA3X/200 R900433703 HED1OA4X/50KL24 R900424715 HED1OA4X/50L24 R900383856 HED1OA4X/350 R900383855 HED1OA4X/100 R900383854 HED1OA4X/50 R900383853 HED1KA4X/500 R900336080 HED1OA4X/350KL24 R900218306 HED5OA12X/210K14V R900207773 HED3OA3X/200K6 R900058282 HED5OP12X/630K14 R900049550 HED8OP1X/100K14A R900031147 HED8OP1X/350K14KW 上海明丰机电设备有限公司代理销售德国博世力士乐Bosch Rexroth液压气动元件 、德国博世力士乐Bosch Rexroth电磁换向阀液压气动元件、德国博世力士乐Bosch Rexroth轴向柱塞泵液压气动元件、德国博世力士乐Bosch Rexroth齿轮泵液压气动元件、德国博世力士乐Bosch Rexroth叶片泵液压气动元件、德国博世力士乐Bosch Rexroth溢流阀、德国博世力士乐Bosch Rexroth节流阀、德国博世力士乐Bosch Rexroth压力开关、德国博世力士乐Bosch Rexroth安全阀液压气动元件、德国博世力士乐Bosch Rexroth插装阀液压气动元件、德国博世力士乐Bosch Rexroth充液阀液压气动元件、德国博世力士乐Bosch Rexroth单向阀液压气动元件、德国博世力士乐Bosch Rexroth方向阀液压气动元件、德国博世力士乐Bosch Rexroth盖板液压气动元件、德国博世力士乐Bosch Rexroth减压阀液压气动元件、德国博世力士乐Bosch Rexroth节流阀液压气动元件、德国博世力士乐Bosch Rexroth截止阀液压气动元件、德国博世力士乐Bosch Rexroth冷却器液压气动元件、德国博世力士乐Bosch Rexroth流量阀液压气动元件、德国博世力士乐Bosch Rexroth升降阀液压气动元件、德国博世力士乐Bosch Rexroth顺序阀液压气动元件等。