轴向柱塞泵基本原理参考课件.ppt

1、Basic Principle of APU轴向柱塞泵基本原理轴向柱塞泵基本原理?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.2叶片螺杆泵摆线泵外啮合齿轮泵齿轮泵模式结构形式叶片泵径向柱塞轴向柱塞柱塞机械原理齿轮内啮合齿轮泵螺杆泵单作用叶片泵双作用叶片泵活塞偏心式轴偏心式斜轴式斜盘式定量泵定量泵模式定量泵定量泵定量/变量定量泵定量/变量定量/变量定量/变量定量/变量

2、液压泵分类液压泵分类?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.3液压泵要素1.组成工作腔2.产生工作腔容积变化4.消除困油现象5.尽量实现液体静液压平衡6.保证寿命的轴承结构7.易于实现自润滑8.合理的吸排油设计9.具有变量机构3.有配油装置?All rights reserved by Bosch Rexroth AG,as well in cases of

3、trade mark rights applications.All rights of disposal as copyof passing by us.4最高额定工作压力最高峰值压力理论排量额定转速最高转速极限吸油压力额定功率实际排量实际流量容积效率机械效率/总效率?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.5最高额定工作压力最高额定工作压力能连续工作的最高压

4、力最高峰值压力最高峰值压力能短时工作的最高压力液压泵特性液压泵特性?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.6理论排量泵主轴转一转所产生的容积变化（无泄漏的状态下，泵轴转一转排出的液体容积：称理论几何排量）理论流量泵在单位时间理论上所排出的液体体积（无泄漏的状态下，泵轴转一转排出的液体容积：称理论流量）Q=q*n液压泵特性液压泵特性?All rights res

5、erved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.7实际流量实际流量理论流量扣除内外泄漏量为实际流量Q实际=Q理论-Q内泄漏：指配油盘吸油腔和压油腔之间的泄漏外泄漏：指流向回转体外的泄漏?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of di

6、sposal as copyof passing by us.8容积效率容积效率泵的实际流量和理论流量之比泵的实际流量和理论流量之比理论理论理论理论实际PVQQ1QQQQQ?液压泵特性液压泵特性?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.9机械效率机械效率/总效率总效率有于各种机械的和液压的磨损，泵的实际输入扭矩大于理论扭矩，其比值为机械效率入扭矩大于理论扭矩，其

7、比值为机械效率泵的总输入功率和输出功率的比值为总效率实际理论PMMM?PVPMP*?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.10额定转速允许连续工作的最高转速最高转速允许短时工作的最高转速?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applicati

8、ons.All rights of disposal as copyof passing by us.11额定功率油泵连续使用的允许最大功率极限吸油压力（允许真空度）油泵吸油管路允许的真空度?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.12性能性能种类种类额定压力bar额定转速rpm额定排量cc变量变量齿轮泵最高300500-60000.2-200定量内啮合齿轮泵内

9、啮合齿轮泵最高300500-30003-250定量叶片泵最高701000-30000.5-100变量径向柱塞泵径向柱塞泵最高1001000-20005-100定量斜轴泵350500-30005-1000定量/变量斜盘泵450500-300010-1000定量/变量?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.13选择油泵需要考虑的因素选择油泵需要考虑的因素工作介质所

10、需要的工作压力范围期望的速度范围最低最高工作温度最低最高工作介质粘度安装要求（配管方式等）驱动方式（连轴器等）期望的使用寿命最大允许噪音值维护容易度最高造价?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.14液压泵和液压马达液压泵和液压马达?在液压系统中，从能量转换的角度看，液压泵把机械能转换成液压能，属于 动力元件；而液压马达则是把液压能转换成机械能，属于转动输出的

11、执行元件。但它们在结构和原理上也有许多相通或相似的地方，属于可逆式机构可逆式机构。?液压泵液压泵?无论泵采用哪种结构开式，从工作原理上看，它们都是通过一个周期性变化的密封容积来完成吸油和压油的过程。而吸油腔和压油腔之间通过配流装置隔开，保证了泵的密封，可以应用于高压的系统。一般来讲，我们所说的液压泵都属于容积式的液压泵容积式的液压泵。?液压马达液压马达?无论是哪种结构形式的马达，它们都是把液压能转换成机械能输出。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.

12、All rights of disposal as copyof passing by us.15开式回路开式回路?如左图。所谓开式回路，指得是泵从液面压力为大气压的油箱中吸油，而执行元件（液压缸或液压马达）的回油到油箱中。所以在开式回路中，有吸油管路，压力管路，回油管路和泄油管路。下图是几种开式回路的系统原理图。?如右图。在回路中加入方向控制阀可以使执行元件（液压马达或液压缸）的回油口接回油箱。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All righ

13、ts of disposal as copyof passing by us.16开式回路开式回路?如左图。执行元件的速度（或转速）可以通过流量控制阀来调节。而溢流阀可以防止系统过载，起安全保护作用。?如右图。系统的动力元件换成了变量泵，三位四通换向阀在中位时可以使泵卸载。系统还加入了过滤器、冷却器和其他辅助元件。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.17闭

14、式回路闭式回路?参见左图。所谓闭式回路，指得是液压油直接从执行元件回到泵的吸油口，这样根据负载方向不同，在回路中就存在高压侧和低压侧。?见右图：图示为双向变量的液压泵和液压马达，两个在高低压侧反向安装的溢流阀可以在两个方向上起安全保护作用。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.18闭式回路闭式回路?见右图：通过一个与主泵相连的辅助泵，可以通过两个单向阀向这种

15、回路的低压侧补充液压油。多余的油通过溢流阀回油箱。?见左图：变量液压泵和液压马达的泄漏油通过独立的管路引回油箱，所以系统需要补充油液。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.19柱塞泵的控制分类柱塞泵柱塞泵斜轴式斜轴式斜盘式斜盘式闭式泵闭式泵开式泵开式泵A4VSOA11VOA10VSOA10VOA10COA4VGA4VTGA4VSGA4VSHA10VGA7VO

16、A8VOKVAA7VA2VA2VK?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.20轴向柱塞单元（泵马达）的分类轴向柱塞单元（泵马达）的分类?斜轴式轴向柱塞泵?斜盘式轴向柱塞泵?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All

17、rights of disposal as copyof passing by us.21斜轴式柱塞单元斜轴式柱塞单元?泵（马达）原理泵（马达）原理?结构原理：如图所示。锥形柱塞的球状端连在驱动轴上，另一端则插在缸体孔中，缸体的轴线与驱动轴的轴线成一角度。（参见示意图）?用作泵：驱动轴通过柱塞带动缸体转动，柱塞则在缸体孔中来回移动，并通过与缸体配合的配油盘完成吸油和排油的过程。在变量泵中，缸体与驱动轴的夹角可以在特定的范围内无级变化，从而改变泵的排量。而在定量泵中，这个倾角是固定不变的。?用作马达：是个逆向过程。压力油推动柱塞在缸体孔中运动，柱塞作用在轴法兰上的力分解后可以驱动轴产生旋转运动。

18、?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.22斜轴柱塞机构示意图斜轴柱塞机构示意图?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.23

19、斜轴式柱塞单元?泵（马达）组件图?结构：见右图。?功能：用作泵时，改变倾角和转速可以改变泵的流量；用作马达时，输出转速和转矩则分别与输入流量和进出压力差成正比。?这种斜轴式的设计中，柱塞作用在缸体上的径向力非常小，而缸体与配流盘之间的球面配合也使得在转动过程中的泄漏很小。即使在高压下，缸体和配流盘之间的压力油膜也能保证最小的泄漏量。所以能够保证很高的容积效率。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as c

20、opyof passing by us.24斜轴式柱塞泵举例斜轴式柱塞泵举例?定量泵（马达）A2F，用于开式或闭式回路中。?变量泵A7VO，用于开式回路中?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.25几种常见类型斜轴液压泵（马达）的职能符号几种常见类型斜轴液压泵（马达）的职能符号?定量马达A2FM，用于开式或闭式回路，正反转输出均可。?变量马达A6VM，用于开式

21、或闭式回路，单向无级变量，正反转输出。?变量泵A7VO，用于开式回路，单向无级变量，单向转动。?变量泵A2V，用于闭式回路，双向无级变量，双向转动。?A，B表示压力油口S表示吸油口T，R表示泄漏油口?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.26斜轴式泵（马达）旋转组件的受力情况斜轴式泵（马达）旋转组件的受力情况?图示为定量泵（马达）组件的受力情况。?在传动轴法兰

22、上进行力的分解。对泵而言，力矩转化成了活塞的作用力；马达的情况正好相反。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.27斜盘式柱塞泵（马达）斜盘式柱塞泵（马达）?结构特点：柱塞置于缸体孔中，其轴线与传动轴的轴线一致。柱塞的另一端通过滑靴与斜盘滑动配合。斜盘的倾角可以改变。?用作液压泵：缸体随着驱动轴一起转动。由于缸体的轴线与斜盘的轴线成一角度，所以柱塞会在缸体孔中

23、前后移动，外伸时完成吸油过程，内缩时完成排油过程。?用作液压马达：压力油推动柱塞外伸，斜盘对柱塞的反作用力可以分解成径向力和轴向力，作用于高压区柱塞上的径向力可以产生转动力矩，从而带动轴转动。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.28斜盘式柱塞机构原理示意图斜盘式柱塞机构原理示意图?All rights reserved by Bosch Rexroth A

24、G,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.29斜盘式柱塞单元?泵（马达）?传动轴1，柱塞2?柱塞面3,柱塞行程4?斜盘5，斜盘倾角6?缸体7，通轴式驱动8?配流盘9，上死点10?下死点11，压力油口12?吸油口13。?功能原理：用作泵时，柱塞的位移通过配流盘完成吸油和排油的过程，改变斜盘的倾角和转速可以改变泵的流量；用作马达时，输出转速和转矩则分别与输入流量和进出压力差成正比。?All rights reserved by Bosch R

25、exroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.30斜盘式柱塞泵举例斜盘式柱塞泵举例?变量泵A4VG，用于闭式回路中。工作压力高过450 bar。?变量泵A10VO，用于开式回路中。工作压力可达315 bar。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of dispo

26、sal as copyof passing by us.31几种常见类型斜盘液压泵（马达）的职能符号几种常见类型斜盘液压泵（马达）的职能符号?变量泵 A4VG，用于闭式回路，双向无级变量，双向驱动，可串联一辅助泵。?变量泵A4VSO/G/H，用于开式、闭式和半闭式回路，无级变量。根据回路的不同，可单向或双向驱动。?A，B表示压力油口S表示吸油口T，R，L表示泄漏油口U表示冲洗油口?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of dis

27、posal as copyof passing by us.32几种常见类型斜盘液压泵（马达）的职能符号（2）?定量马达A4FM，用于开式或闭式回路。正反向转动。?变量泵A10VO，用于开式回路，单向无级变量，单向驱动。?变量泵A11VLO，用于开式回路，单向无级变量，单向驱动，内置辅助泵。?A，B表示压力油口S表示吸油口T，R，L表示泄漏油口U表示轴承冲洗油口?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as

28、copyof passing by us.33液压泵的变量控制液压泵的变量控制?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.34?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as co

29、pyof passing by us.35泵控液压系统与阀控液压系统能耗比较泵控液压系统与阀控液压系统能耗比较泵控系统节流阀控系统负荷传感阀控系统QQQPPP执行机构A执行机构B浪费掉的能量?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.361.1.泵变量控制控制了什麽泵变量控制控制了什麽-压力：恒压；负荷传感压力：恒压；负荷传感-流量流量-功率油泵变量控制的要点油泵

30、变量控制的要点?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.37Vgmax.Vgmin.先导压力P恒压控制恒功率控制先导流量控制?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as co

31、pyof passing by us.382.2.变量泵系统变量泵系统-压力耦合-流量耦合?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.39液压油泵变量方式汇总液压油泵变量方式汇总*压力控制变量*压差控制变量*带有反馈的排量控制变量*速度感应变量*电子控制变量*压力指令变量*逆向控制变量?All rights reserved by Bosch Rexroth AG

32、,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.40轴向柱塞泵的变量控制轴向柱塞泵的变量控制Pump Control?单击获取数据表P control压力信号控制?P control负荷传感控制Q control机械反馈变量DA-SSC control速度感应变量Electronic control电子泵Pres.Comm.压力指令变量Mooring Cont.逆向控制恒压控制DRDP恒功率控制LR负荷传感控制DFRPstiMn伺服控制HS/HS

33、3EOEPDFE二次调节DS1压力指令控制DRGq?HD 液控变量HW 手动变量EP 电控变量q 控制控制A10V-DFE1A4VSO E1-S02速度感应控制DA?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.41泵的控制方式（机械手动控制）?MA：手动控制?MD：机械先导控制?EM：电马达控制?All rights reserved by Bosch Rexrot

34、h AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.42泵的控制方式（液压机械控制）?DG：直接液压控制，压力相关?HW：液压控制，行程相关，有时零位有死区?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.43泵的控制

35、方式（液液控制）?HD：液压控制，与先导压力成比例。有时存在死区。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.44泵的控制方式（电液控制）?EZ：利用开关型电磁铁控制?EP：开式回路，利用比例电磁铁控制?ES：闭式回路，利用伺服阀控制?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.45泵的控制方式（液压控制，流量相关）?HM：与先导流量成比例。?HS：利用内置电液伺服阀控制，与控制电流成比例。?EO：利用内置比例阀控制，带电放大器，闭式回路。?All rights reserved by Bosch Rexroth AG,as well in cases of trade mark rights applications.All rights of disposal as copyof passing by us.