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哈威液压减压阀常见故障减压阀维护和修理保养哈威HAWE液压减压阀是通过调整，将进口压力减至某一需要的出口压力，并依靠介质本身的能量，使出口压力自动保持稳定的阀门。
从流体力学的观点看，减压阀是一个局部阻力可以变化的节流元件，即通过更改节流面积，使流速及流体的动能更改，造成不同的压力损失，从而达到减压的目的。
然后依靠掌控与调整系统的调整，使阀后压力的波动与弹簧力相平衡，使阀后压力在确定的误差范围内保持恒定。
哈威HAWE液压减压阀的常见故障（1）出口压力几乎等于进口压力，不减压一故障现象表现为：减压阀进出口压力接近相等，而且出口压力不随调压手柄的旋转调整而变化。
产生原因和排出方法如下。
①因主阀芯上或阀体孔沉割槽棱边上有毛刺或者主阀芯与阀体孔之间的间隙里卡有污物，或者因主阀芯或阀孔形位公差超差，产生液压卡紧，将主阀芯卡死在开度（max）的位置上，由于开口大，油液不减压。
此时可依据上述情况分别实行去毛刺、清洗和修复阀孔和阀芯精度的方法予以排出。
②因主阀芯与阀孔搭配过紧，或装配时拉毛阀孔或阀芯，将阀芯卡死在开度位置上，此时可选搭配理的间隙。
J型减压阀搭配间隙一般为0. 007～0. 015mm，配前可适当研磨阀孔，再配阀芯。
③主阀芯短阻尼孔或阀座孔堵塞，失去了自动调整机能，主阀弹簧力将主阀推往开度，变成直通无阻，进口压力等于出口压力。
可用1. Omm钢丝或用压缩空气吹通阻尼孔，并进行清洗再装配。
④对J型减压阀，带阻尼孔的阻尼件是压入主阀芯内的，使用中有可能因过盈量不够而冲出。
冲出后，使进油腔与出油腔压力相等（无阻尼），而阀芯上下受力面积相等，但出油腔有一弹簧，所以主阀芯总是处于开度的位置，使出口压力等于入口压力。
此时需重新加工外径稍大的阻尼件并重新压入主阀芯。
⑤JF型减压阀，出厂时泄油孔是用油塞堵住的。
当此油塞未拧出而使用时，使主阀芯上腔（弹簧腔）困油，导致主阀芯处于开度而不减压。
J型管式阀与此相同。
J型板式阀假如设计安装板时未使L口连通油池也会显现此现象。
HAWE单向阀技术资料下载哈威单向阀上海办事处，你只需提供正确的型号，我们都可以第一时间给您报价。
德国哈威单向阀又称止回阀或逆止阀。
用于液压系统中防止油流反向流动,或者用于气动系统中防止压缩空气逆向流动。
单向阀有直通式和直角式两种。
直通式单向阀用螺纹连接安装在管路上。
直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。
液控单向阀也称闭锁阀或保压阀，它与单向阀相同，用以防止油液反向流动。
但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。
液控单向阀采用锥形阀芯，因此密封性能好。
在要求封闭油路时，可用此阀作为油路的单向锁紧而起保压作用。
液控单向阀控制油的泄漏方式有内泄式和外泄式二种。
在油流反向出口无背压的油路中可用内泄式；否则需用外泄式，以降低控制油压力。
HAWE单向阀安装位置HAWE单向阀就是止回阀旋启式止回阀安装位置不受限制，通常安装于水平管路，但也可以安装于垂直管路或倾斜管路上。
HAWE单向阀注意事项安装止回阀时，应特别注意介质流动方向，应使介质正常流动方向与阀体上指示的箭头方向相一致，否则就会截断介质的正常流动。
底阀应安装在水泵吸水管路的底端。
HAWE单向阀关闭时，会在管路中产生水锤压力，严重时会导致阀门、管路或设备的损坏，尤其对于大口管路或高压管路，故应引起止回阀选用者的高度注意。
HAWE单向阀只供防止各类管路或设备上流体介质逆流的单向启闭阀。
公称通径:21/16“~41/16“工作压力：2,000~15,000PSI温度：-60°C~+121°C(K,U)产品规范级别：PSL3~4产品性能级别：PR1~2材料级别：AA~FFHAWE单向阀技术资料下载HAWE单向阀常见故障①阀瓣打碎；②介质倒流。
引起阀瓣打碎的原因HAWE单向阀前后介质压力处于接近平衡而又互相“拉锯”的状态，阀瓣经常与阀座拍打，某些脆性材料（如铸铁、黄铜等）做成的阀瓣就被打碎。
换向滑阀联接板尾板液压符号：（见3.1.4节）减压阀9 14 22 34见代码1具有进口调节阀的换向阀可以选装的次级限压阀(无缓冲阀)F 型 FP2型无进口调节阀 作为预选开关的三FP3型FP2型FP1型可能的组合：带进口调节阀的 A2..(A5..)PSL 5.../...3型连接块中的限压阀(先导式) PSL3/(4).../...3型连接块中的限压阀(直动式) 测量时的油粘度约为60mm/s流量Q(lpm) PSL..型连接块 循环压力P→R换向阀P→A(B),A(B) →R次级限压阀按3.2.1节表16的代码A...B...;C...流量Q(lpm)流量Q(lpm)流量Q(lpm)背压(b a r )设定压力(b a r )二通进口调节阀比例压力限制阀,参见第3.1.4节表9,型号PA…PD 参见第3.2.1节表17,型号FP(H)1(2,3)负载压力P a 和B (b a r )执行元件流量的控制曲线(装有进口调节阀的SL3—X2../..型换向阀的实例) 控制电流I(A) 24VDC 12VDC液压控制H.F.的控制压力(bar)手动A.C 操纵杆的角度.表15的流量代码表15的流量代码控制电流I(A)流量Q(lpm)0470/EN通过霍尔传感器监控阀芯的行程电流-阀芯曲线信号电压测量时油的粘度约为60mm阀芯开启量线圈b 线圈a.5.1 连接快减压阀限压阀尾板未注尺寸参见5.2节中间板ZPL32和ZPL52(同时可见D7700-3和D7700-5)减压阀限压阀截止换向阀尾板未注尺寸参见5.2节油口标准参见DIN ISO 228/1(BSPP)油口标准参见SAE J 514:换向阀见5.3++节见表8中型号21) 该尺50mm,2) PSL..H..油口按照5.2 尾板扭距23Nm扭距9.5Nm 油口按照:换向位置b换向位置a限制B位流量的挡块1)限制A流量的挡块1)限制行程的中间板终端块侧连接块侧1)行程调节螺钉为M5辅助块参见 5.8节EA、EOA 型操纵方式手动应急操纵按钮代码TH限制A 位流量的挡块插头可转180°EOA-型操纵方式的螺堵 （Z 7709 047配套件还有 O 形圈12.42x1.78 HNBR 90ShO 形圈9x1.5 NBR 90 Sh 和O 形圈7625 109/1）B 端限制位流量的堵块ET、EAT、ETH 和EATH 型操纵方式E 型操纵形式A…型 B…型 A…B…型连接块侧终端块侧A..B..S1..型接口U和W＝G1/8（BSPP）标注的数据（换向阀和操纵方式）见5.3至5.5节！A..B..FP1(2,3)A..B..FPH1(2,3)型FPH…型的按钮（手动应急操纵）/2 AS.. BS.. /2 AN.. BN.. /2 DRH /UNF 2 AS.. BS.. /UNF 2 AN.. BN.. /UNF 2 DRH 型型1）内六角螺钉ISO4762－M6x35―A2―70最大拧紧力矩9.5Nm/ZSS ，/ZVV 型螺纹接口A 和B（所有结构形式）：内六角螺钉 ISO4762-M6xg-A2-70最大扭矩9.5Nm 组装的换向阀块按照5.3节/2 /UNF2型下图示出液压起重机的典型阀组。
;=©1998 by HAWE HydraulikApril 2010-01D 7700-7F page 22.Type coding, overviewValve section (for individual orders, without sub-plate)Inlet section (for individual order, without sub-plate)SLF 7 - A 2 J 320/250 A 300/EA - G 24PSVF A B1 F / 400 - 7 - G 2416131211109875431167116151413121110987654322+Valve bankPSVF A S 1 F / 400/7 SAE-7- A2J 320/250/EA/6 SAE- A2H 320/320F1/EA/ 6 SAE - E4 - G 241Order examples:;Basic type coding for the valve bank or inlet section (see table 1 and 5 in sect. 3.1) as well as valve sections (see sect. 3.2)PSVF ASupply with pressurized oil by means of variable displacement pump (closed center)with a delivery flow controller, or as a second,separate unit if both valve banks are connec-ted to a constant pressure systemSLFIndividual valve section, without sub-plate<Additional elements (see table 2 and 4 in sect. 3.1)(no coding)Basic version S, W Additional damping device in gallery LS (onlywith PSVF , standard with PSLF)B, B 4 ... B 7Orifice in gallery LS (PSVF only)G Restrictor check valve (type PSLF)=Control oil supply (see table 7, sect. 3.1.3)(no coding)Without pressure reducing valve in case ofan external control oil supply (min. 20 bar up to max. 40 bar)1With integrated pressure reducing valve forthe internal supply of control oil (control pres-sure approx. 20 bar)2With integrated pressure reducing valve forthe internal supply of control oil (control pres-sure approx. 40 bar)>Optional 2/2-way solenoid valve for arbitrary idle pump circu-lation (see table 8, sect. 3.1.3)(no coding)Without directional valve, but prepared forretrofittingF , Z, ZM De-energized open = Idle pump circulationwhen valve is de-energizedD, V De-energized closed = Idle pump circulationwhen valve is energizedF ..or D..When a pressure is specified, with pressurelimiting valve which can be activated as a second pressure stage (e.g. F 80)PA, PB, PD Prop. pressure limiting valve, with variouspressure ranges ?Pressure limiting valve (main pressure limitation) in the inlet section (see table 9, sect. 3.1.3)(no coding)Without pressure limiting valve (type PSVFonly)/ ...Pressure limiting valve factory set to ... bar@Sub-plate for the inlet section (see table 3, sect. 3.1)/7Size 7, standard (tapped ports for P and RG 1 1/2 ISO 228/1 (BSPP))/7 SAE Size SAE (flange SAE 1 1/2” 6000 psi)A Size (see table 1 and 5, sect. 3.1)7Size 7BValve section - Basic function (see table 13, section 3.2.1)A 2 (standard) Spool valve with inflow controller for eachconsumerA 1Spool valve without inflow controller, suitablefor consumers, which are actuated individual-ly and successively but not simultaneously (no additional functions possible)A 5Inflow controller with enforced spring forhigher flowAX Blanking plate C Coding for the flow-pattern (see table 14, sect. 3.2.1 and 6 c)L, H, J, ODFlow coding for port A and B (see table 15, sect. 3.2.1).../...Coding for port A or B (independently selec-table)120, 160, 250, 320, 400ELS-pressure limitation (deviating from the mainpressure setting, lower pressure for the connected consu-mer) no shock valves (see table 16 and 18, section 3.2.1)(no coding)No LS-pressure limitation A..., B...Only for consumer port or B A...B...For consumer ports A and BD 7700-7F page 3F Functional cut-off (see table 17 and 18, sect. 3.2.1)(no coding)No functional cut-offF 1Electrical cut-off, consumer port AF 2Electrical cut-off, consumer port BF 3Electrical cut-off, consumer port A and BFP 1(2, 3)Like F1(2,3), however with electro-proportio-nal pressure limitationFPH 1(2, 3)Like FP1(2,3), however with additional push-button for manual emergency actuation S 1External hydraulic load signal pick-up fromthe control signal port U(consumer port A)and W (consumer port B)G Types of actuation (see table 19 and 20, sect. 3.2.1)/A Manual actuation/E Electro-hydraulic actuation/EA Electro-hydraulic and manual actuation/E0A Like /EA, however without actuation solenoid(prepared for retrofitting)/H Hydraulic actuation/H UNF Like /H, however with connection7/16-20UNF-2B SAE-4 (SAE J 514)/HA, /HEA Hydraulic, solenoid and manual actuation/HA UNF Like /HA,however with connection 7/16-20UNF-2B SAE-4 (SAE J 514)/C Detent(stepless)/ER, /EAR Electrical, 3-step detent/P Pneumatic actuation/PA Pneumatic actuation and manual actuation/... Suffix 1without hand leverWA, WA-EX Position sensorU Lift monitoring(side indication)H Sub-plate for the individual valve section (see table 21,section 3.2.2)/6 SAE Sub-plate size 7, ports A and B with flangeSAE 1 1/4” (6000 psi)/56 SAE Sub-plate size 7, prepared to accept valvesections size 5, ports A, B with flangeSAE 1 1/4” (6000 psi)/7Sub-plate size 7, ports A and B with G 1 1/2acc. to ISO 228/1 (BSPP)/56Sub-plate size 7, prepared to accept valvesections size 5, ports A, B with G 1 1/4 acc.to ISO 228/1 (BSPP)I End plates (see table 11, section 3.1.4)E 1With T-port for control oil returnexternally to the tank (basic type)E 4Like E 1, however with internal drain connec-tion, max. pressure 10 bar!J Solenoid voltage and version (see table 10, sect. 3.1.3)G 12..12 V DC, connection conf. EN 175 301-803 A,G 24..24 V DC, connection conf. EN 175 301-803 A,G 24 EX24 V DC, explosion-proof version, acc. toATEXG 24 EX 7024 V DC, explosion-proof version, acc. toATEX (ambient temperature 70°C)G 24 MSHA24 V DC, explosion-proof version, acc. toMSHAG 12 IS12 V DC, explosion-proof version, flame proof,intrinsically safe acc. to ATEX (I M2 Ex d ib I) AMP 12 K 412 V DC, connection via AMP Junior TimerAMP 24 K 424 V DC, connection via AMP Junior TimerS 12..12 V DC electr. connection via quarter turnplugS 24..24 V DC electr. connection via quarter turnplugD 7700-7F page 4D 7700-7F page 5D 7700-7F page 6D 7700-7F page 7D 7700-7F page 8D 7700-7F page 9D 7700-7F page 104.Characteristic data 4.1General and hydraulicType coding DesignMounting PSLF, PSVF und SLFDirectional spool valve for manifold mounting, up to 8 spool valves may be combined in a valve bank by means of sub-plates, all-steel designAnyP=Pressure inlet (pump)R=ReturnA ,B=Consumer portsU, W, X=Load-signal outlet at the indiv. spool valve sectionLS=Load-signal outlet e.g. connection of pump metering valve at PSVF.Attention: No pressure input!M=Pressure gauge connection (pump side)Z=Pilot pressure connection (20...40 bar inlet, 20 or 40 bar outlet)T=Control oil return portY=Load-signal inlet port (end plate E 2 and E 5)Installation position PortsSize 5Indiv. section 4 x M10Valve bank M10Size 7Inlet section PSLF, PSVF12.0Valve section Actuation A, E, F, H, P24.6 1)EA, PA25.0 1)FA, HA24.61)FEA, HEA25.01)Sub-plates/7, /56/6 SAE, /56 SAE12.0End plates E 1, E 4 3.0See dimensionaldrawings in sect. 5 ++1)+ 0.4 kgat version withfunctional cut-off(coding F.., FP.., FPH..acc. to table 16)P, R, A, B=Acc. to dimensional drawings (see sect. 5.1.10)M, LS, Z, T, Y=G 1/4 conform. ISO 228/1 (BSPP) (see sect. 5.1.10)U, W, X=Acc. to dimensional drawings (see sect. 5.1.10)Indiv. valve section and sub-plates: All surfaces corrosion-inhibiting, gas nitrided(Solenoid at actuation E... and additional functions F1...F 3, FP 1...FP 3, FPH 1...FPH 3 inc galva-nized and olive-green anodized)Port sizeSurface coatingMass (weight) approx. (kg)Temperature Ambient: approx. -40 ... +80°C; Fluid: -25 ... +80°C, pay attention to the viscosity range!Start temperature down to -40°C are allowable (Pay attention to the viscosity range during start!),as long as the operation temperature during consequent running is at least 20K (Kelvin) higher.Biodegradable pressure fluids: Pay attention to manufacturer's information. With regard to the com-patibility with sealing materials do not exceed +70°C.Observe restrictions for versions with ex-proof solenoid!Rec. contamination class Operating pressure ISO 4406 18/14p max= 400 bar; Ports P, P1, A, B, LS, M, YThe max. pressure achievable at the consumer side of the spool valves is lowered by the amount equivalent to the internal control pressure drop at the 3-way flow regulator of the PSLF (see curves) or at the pump flow regulator (PSVF).Return port R(R1) ≤20 bar; port T pressure less with separate pipe (e.g. 8x1) to the tank. It is recommended to employ end plate E 1, E 2, E 3, etc. with an additional leakage port, in case hig-her return pressure is anticipated. Port Z approx. 20 or 40 bar (acc. to coding, see table 7) (outlet);≤40 bar (inlet)Control circuit Flow For control pressure, see Q-I-characteristics. The internal control oil circuit is sufficiently protect-ed against malfunctions caused by contamination by means of a disk filter.Acc. to the specifications in table 14, in sect. 3.2.1Pressure fluid Hydraulic fluid (DIN 51524 table 1 to 3); ISO VG 10 to 68 (DIN 51519)Viscosity range: min. 4; max. 1500 mm2/sec; Optimal operation range: 10...500 mm2/secAlso suitable are biodegradable pressure fluids of the type HEPG (Polyalkylenglycol) and HEES(synth. Ester) at operation temperatures up to +70°C. HETG (e.g. rape seed oil) or water basedfluids e.g. HFA or HFC must not be used!D 7700-7F page 31D 7700-7F page 326.3.5Seal kitsSize 7Inlet section (control section)DS 7700-F 71Valve section DS 7700-F 72Sub-plateDS 7700-F 74Control grooveTapped plug6.3.4Notes on changing the spoolThe valve spools are not mated to one spool housing. Therefore valve spools can be changed at any time to adapt to changing consumer consumption.The following routine is to be followed particularly:Advice on changing the valve spool1.Slacken screws ;(ISO 4762-M5x8-8.8-A2K), remove spring cover2.Remove screw <(M 6x40, machined flat head screw dra-wing No. 7709 042)3.Remove spring assembly including spring cap =4.Slacken screws >(ISO 4762-M5x50-8.8-A2K)5.Lift lever housing including spool out of spool housing,drawing ?@6.Remove circlip DIN 6799 3,2 and remove bolt A B7.Assemble with (new) spool in reverse sequence Attention:The control grooves of the valve spool should always be installed towards the end plate! Exception: Valve spools with flow coding 400 do not show control grooves.Indications for angling the lever housing by 180°(inversion of the shifting mode)As set out in 1. - 7. above, however instead of a new valve spool the existing one has to be disconnected, angled at 180° and remounted (see above mentioned note). The in-termediate plate C together with the lever housing, have to be angled at 180°.All lever housings of the valve bank have to be rotated!Lever housing angled at 180°6.3Notes regarding assembly, installation and conversion。
德国哈威HAWE参数技术资料HAWE R系列哈威径向柱塞泵产品介绍: R型径向柱塞泵是由阀配式星形排列的柱塞缸组成。
通过多达6排柱塞缸的并联配置，可以实现较大的流量输出。
一般情况下，电机驱动泵，并通过法兰和联轴器与泵联接。
特别令人感兴趣的是该泵可派生多个压力输出口。
zui大压力Pmax＝700bar zui大流量Qmax＝91.2l/min德国HAWE哈威LP型液压泵工作气容量Vmax geom.=28,3 ml/双冲程输出流量Qmax液=approx.12 lpm工作压力Pmax液=1500 bar Pmax气=10 bar可与各种规格的油箱组成液压泵站，此泵站也可与换向阀组合德国HAWE哈威LP型液压泵的种类：1、按流量是否可调节可分为：变量泵和定量泵。
输出流量可以根据需要来调节的称为变量泵，流量不能调节的称为定量泵。
2、按液压系统中常用的泵结构分为：齿轮泵、叶片泵和柱塞泵3种。
齿轮泵：体积较小，结构较简单，对油的清洁度要求不严，价格较便宜；但泵轴受不平衡力，磨损严重，泄漏较大。
叶片泵：分为双作用叶片泵和单作用叶片泵。
这种泵流量均匀、运转平稳、噪音小、作压力和容积效率比齿轮泵高、结构比齿轮泵复杂。
德国哈威V30Z型轴向变量柱塞泵结构特征工作压力pmax=420bar排量vmax=2x115cm3/u.zui小的功率重量比.通过减轻变量机构重量,获得很短的调节时间.特殊的斜盘轴承,显著降低了噪音.全钢质柱塞套置于摇摆滑动圆盘的新型卸压支承结构,提高了典型磨损件的寿命..抗磨钢制造的控制盘结构设计,可降低柱塞腔内升压与减压产生的噪音德国哈威V30Z型轴向变量柱塞泵重要的优点.低的声压电平,因而在很多情况不必采取降噪的辅助措施.控制组件采用模块化结构,在装配与拆卸,以及改装控制部件时,不用拆开泵本体.机械式转角指示,是重要的功能控制辅助机构.通轴式驱动轴,便于组装各种符合ASE-A法兰标准的辅助泵HAWE哈威径向柱塞泵分为阀配流与轴配流两大类。
