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1、负载敏感型比例多路阀,普通六通多路阀：,集换向阀，单向阀；过载阀；补油阀等功能为一体的集成阀。流量受负载影响。零位死区大。可以有微量的比例控制范围，但随着系统压力升高而减少。可以实现启动平稳无冲击。,2023/2/24,PSL和PSV比例多路阀产品介绍,恒流量控制工作原理（一）,2023/2/24,PSL和PSV比例多路阀产品介绍,恒流量控制工作原理（二）,2023/2/24,PSL和PSV比例多路阀产品介绍,恒流量控制工作原理（三）,在相同的压差下，节流口面积越大流量越大。通过三通流量阀保持节流口两端的压差恒定。多余流量由三通阀分流回油箱。节流阀的压差只决定于弹簧力大小。不受负载影响。该阀有
2、一个进口两个出口也称三通流量控制阀,2023/2/24,PSL和PSV比例多路阀产品介绍,独立负载控制工作原理（二）,2023/2/24,PSL和PSV比例多路阀产品介绍,独立负载控制工作原理（三）,为了确保多个执行元件同时工作，在片阀之间应进行压力补偿。对于不同压力负载的执行元件来说，补偿阀应可以自动实现不同的压力需求补偿。由于该压力补偿阀为一进一出二个油口故称“二通流量控制阀”。,2023/2/24,PSL和PSV比例多路阀产品介绍,标准定量系统的效率,系统卸荷压力P,泵流量Q,负载压力P1,所需流量Q1,由主溢流阀设定系统的最大工作压力系统总是以最大流量工作,2023/2/24,PSL和
3、PSV比例多路阀产品介绍,阀控系统的效率,系统卸荷压力P,负载压力P1,泵流量Q,所需流量Q1,系统压力由三通阀建立系统压力略高于负载最高压力多余流量于系统压力下卸荷。,2023/2/24,PSL和PSV比例多路阀产品介绍,泵控系统的效率,系统压力由变量控制器建立系统压力略高于负载最高压力变量泵按需要输出流量,系统卸荷压力P,泵流量Q,负载压力P1,所需流量Q1,两通压力补偿器,虽然两通阀可以实现控制与负载无关，是通过消耗能量来实现的，节流发热的大小决定于补偿压力和过流量。在控制精度高的场合，由于压力补偿器在初始状态是全开的，补偿特性较差，因此不能用于负载速度环节。,PSL-前板,PSL-换向
4、阀,PSL-换向阀附加片,PSL-换向阀附加中间片,PSL-中间过渡片,PSL-换向机构,电液手联动带来的优势,整机方便布局减少操作强度简化管路；增加灵活性提高总体效率实现遥控及远控危险区域的工程机械,带位移传感器的阀芯,增加动态响应克服滑阀死区提高控制精度及操作的重复性。减少滞环的产生。,减振观,性能和优点/Features and benefits阀组或板式安装的结构形式,三(二)种规格/Design as valve bank or manifold mounting,three(two)sizes 定量泵或变量泵设计/Design for constant or variable di
5、splacement pumps pmax=420 bar(6000 psi)Qmax A,B=210 l/min(55.4 gpm),Qmax P=350 l/min(95 gpm)可以集成各种不同的附加功能和元件/Various additional functions and elements may be integrated一个连接块最多可以集成(附加)12个换向阀/Max.12 valve sections can be fed(added)by one connection block,F7700-2/04.2002,-带换向阀块/Valve sections with-包括阀芯
6、在内的基本阀块/Basic block incl.spool-操纵方式/Actuation-附加功能/Additional functions,终端板/End plate,具有附加功能的连接块/Connection block with additional functions,PSL和PSV型比例换向阀-基本结构形式 Prop.directional spool valve type PSL and PSV-basic design,换向阀的阀芯(计量活塞)/Spool(metering piston),三通流量调节阀/3-way flow regulator,计量弹簧(9bar/Meter
7、ing spring(9 bar/125 psi),定量泵系统中三通流量调节阀的阻尼减振 Dampening of 3-way flow regulator within constant pump systems,Schwingung.ppt/12.2003,阻尼元件/Dampening element,定量泵系统中三通流量调节阀的阻尼减振 Dampening of 3-way flow regulator within constant pump systems,Schwingung.ppt/12.2003,标准型(节流阀,单向阀和顺序阀的组合)/Serie(combination res
8、trictor,check valveand sequence valve),代码G(单向节流阀)/Coding G(restrictor check valve),increased throttling effect,代码Z(带附加卸载阀的单向节流阀)/Coding Z(restrictor check valve with additional unloading valve),代码K(间隙型节流阀的结构形式,具有独立于温度的阻尼效果)/Coding K(version with gap type throttle with rather temperatureindependent d
9、ampening effect),barb-F7700-12/01.2004,节流阀,单向阀和预压阀的组合/Combination of throttle-,check and pre-load valve,例:三通流量调节阀/Example:3-way-flow regulator,时间范围/Ranges:t1-压力信号迅速地通过单向阀/Quick pressure signal via check valve t2-引起振动的负载小于20bar时的工作范围(通过节流阀阻尼)/Working range with load induced oscillations lower than 20
10、 bar(dampened via throttle)t3-工作结束,通过预压阀快速卸压=(P大于20bar)/End of work,quick discharging via pre-load valve=(p 20 bar)t4-在终端位置时流量调节阀的活塞通过节流阀阻尼/Dampening of the flow regulator piston movement in end position via throttle,优点:/Advantage:-结构简单,/Simple design缺点/Disadvantage:-阻尼一直到P小于P预压力(常数)/Dampening only
11、up to p ppre-load(const.)-阻尼效果(用螺纹型节流阀)部分取决于粘度(如：温度)/Dampening effect(by thread type throttle)partly depends on viscosity(means also temperature),(pL-pReg),20 bar,t1,t2,t3,t4,p 20 bar IP预压力 的波形corr.ppre-load,p 20 bar II,阻尼作用的范围/Range of dampening effect,流量调节阀的阻尼减振I Dampening of flow regulators I,pL,
12、pReg,=,LS压力/LS-pressure,pL,pReg,优点:/Advantage:-阻尼的效果(广度)取决于绝对压力级/Dampening effect(width)depends on the absolute pressure level-螺纹型节流阀具有较高的阻尼效果/Higher dampening effect with thread type throttle缺点:/Disadvantage:-结构复杂/Complex design-阻尼效果(用螺纹型节流阀)部分取决于粘度(如：温度)/Dampening effect(by thread type throttle)de
13、pends partly on viscosity(i.e.temperature),节流阀,单向阀及快速卸压阀的组合/Combination of throttle-and check valve as well as quick release valve,例:三通流量调节阀/example:3-way-flow regulator,pReg,pL,t1,t2,t3,阻尼作用的范围/Range of dampening effect,Bereiche/Ranges:t1-压力信号迅速通过单向阀/Quick pressure signal via check valve t2-比值小于3负载
14、振动的工作范围(I或II)(通过节流阀阻尼)/Working range(I or II)with load oscillations with a ratio 3(dampened via throttle)t3-工作结束,通过快速卸压阀压力迅速下降./End of work,quick pressure drop via quick release valve,pReg/pL 3 I,pReg/pL 3 II,barb-F7700-13/01.2004,LS压力/LS-pressure,流量调节阀的阻尼减振IIDampening of flow regulators II,pReg,pL,
15、pReg,在变量泵系统中LS压力信号的阻尼减振Dampening of LS-pressure signal within variable pump systems,Schwingung.ppt/12.2003,代码S(节流阀,单向阀和顺序阀的组合)/Coding S(combination restrictor,check valve and sequence valve),代码B(LS信号油路中有0.8mm的节流孔)/Coding B(orifice 0,8mm inLS-signal line),标准型,无代码(无阻尼元件)/Serie without coding(no dampen
16、ing element),换向阀的阀芯(计量活塞)/Spool(metering piston),二通流量调节阀/2-way flow regulator,计量弹簧(6bar/85psi)/Metering spring(6bar/85psi),Schwingung.ppt/12.2003,二通流量调节阀的阻尼减振Dampening of 2-way flow regulator,二通流量调节阀的阻尼减振Dampening of 2-way flow regulator,换向阀的阀芯(计量活塞)/Spool(metering piston),二通流量调节阀/2-way flow regulat
17、or,计量弹簧(6bar/85psi)/Metering spring(6bar/85psi),标准型(带节流孔)/Standard(with orifice),回弹阻尼(带单向节流阀)/Rebound damping(with restrictor check valve),Schwingung.ppt/12.2003,换向阀阀芯特性的阻尼减振I Dampening of oscillation via the spool characteristic I,Schwingung.ppt/12.2003,机能符号L.M.F.H/Symbols L,M,F,H,面积比/area ratioAab
18、/Azu=计算./calculation:z.B.:SL3-32 H(QPu)/QPu x.,Azu,Aab,换向阀阀芯特性的阻尼减振II Dampening of oscillation via the spool characteristic II,Schwingung.ppt/12.2003,机能符号J,B,R,O/Symbols J,B,R,O,应与平衡阀组合在阀芯1/3以上的行程时产生大约20Bar的背压/To be combined with over-center valves.Creation of a back pressure of approx.20 barat 1/3
19、and more spool lift.,机能符号I,Y,Z,机能符号J,B,R,O,机能符号L,M,F,H,换向阀阀芯特性的阻尼减振III Dampening of oscillation via the spool characteristic III,Schwingung.ppt/12.2003,流量代码16-25/25-16的换向阀阀芯按照这个流量代码与较少流量的A-R和/或B-R组合通常要与平衡阀组合以便在换向阀阀芯的整个行程产生一定的背压/Spools with flow code numbers i.e.16-25/25-16.Herewith the flow code num
20、ber PA and/or PB is combined with a smaller one for AR and/or BR.Generally be combined with over-center valves to create a certain back pressure over the complete stroke of the spool.,机能符号I,Y,Z,机能符号J,B,R,O,机能符号L,M,F,H,换向阀阀芯特性的阻尼减振IVDampening of oscillation via the spool characteristic IV,Schwingung.
21、ppt/12.2003,机能符号I,Y,Z/Symbols I,Y,Z,与马达(面积比1:1)组合时在换向阀阀芯1/3以上的行程时产生大约100bar的背压/To be combined with motors(area ratio 1:1).Creation of a back pressure of approx.100 barfor up to 1/3 spool lift.,机能符号I,Y,Z,机能符号J,B,R,O,机能符号L,M,F,H,借助于换向阀阀芯特性的振动阻尼 VDampening of oscillation via the spool characteristic V,
22、Schwingung.ppt/12.2003,机能符号 P,A,Q,K,T/Symbols P,A,Q,K,T,具有正遮盖的换向阀阀芯(也就是当阀芯换向时P-A(B)先接通,B(A)R后接通:机能符号P应当与马达(面积比1:1)组合机能符号A.Q,K.T应当与双作用液压缸(面积比1:1)组合.短期的预加载可以防止下降振动和真空运转/Spools with positive overleave(i.e.during elevation of the spool the connection P A(B)is opened before of connection B(A)R):Symbol P to be combined with motors(area ratio 1:1).Symbols A,Q,K,T to be combined with double acting cylinders(area ratio 1:1).A short-term preloading prevents lowering jolts“and running empty“,HYDRAULIC SYSTEM,整体自装卸车-1998,消防车-1999,SKS-1979,SK-1968,PSL-1992,PSL-CAN,技术根源,
