力士樂3WRCBEE型比例方向控制閥的技術(shù)指南

【資料簡(jiǎn)介】

The 3/3 directional high-response valve is designed as   cartridge valve with integrated control electronics for the stepless closed-loop control of a from P to A and A to T。

Technical design  

The valve consists of the following assemblies  

• Cover (1) with connection faces,  

• Main spool (7) with control edges,  • Bushing (2),  

• Pilot control valve (3) with paired spool/bushing unit and   inductive position transducer (6).  

• Integrated control electronics (4) with inductive position   transducer (12) of the main spool.

Function  

• Actuation of the main spool (7) using the pilot control valve   (3); pressure build-up in the control chamber (10) acts on   area (8) – the pressure in port A acting on area (11) and the   spring force (9) act in the opposite direction  

• The spool of the pilot control valve is controlled by means   ofproportional solenoid (5) against the force of the spring in   the pilot control valve.  

• Linking of command values (4) and actual values (12 and 6)   in the microcontroller of the integrated control electronics (4)  

• Pilot oil supply X to the pilot control valve port P; pilot oil   drain via Y to the tank  

• At command value 0 V or 12 mA the electronics controls the   main spool (7) in central position, thus pressure in A approx.   P system/2  

• Area ratio of area (11) to area (8) at:  

Size 25 = 1 : 1.5  

Size 32 = 1 : 1.5  

Size 50 = 1 : 1

Failure of supply voltage

The integrated control electronics de-energizes the sole-noid when the supply voltage fails or the cable is ruptured

• Depressurization of spool area (8) via pilot control valve (3)   to Y to the tank.

• Due to spring force (9) and pressure in port A on area (11)   the main spool (7) opens the connection A to T and closes   from P to A

Important note:  Failure of the supply voltage results in the closed control loop   stopping abruptly. The accelerations occurring at this point   may lead to machine damages.

3WRCBEE25VF190M-1X/G24K31/A1M      3WRCBEE25VF190M-1X/G24K31/F1M
3WRCBEE32VF380M-1X/G24K31/A1M      3WRCBEE32VF380M-1X/G24K31/F1M
3WRCBEE50V750M-1X/G24K31/A1M       3WRCBEE50V750M-1X/G24K31/F1M

力士樂3WRCBEE型先導(dǎo)式三位三通方向控制閥的特征（3/3 directional high-response valve Features）：Pilot operated 3/3 directional high-response valve sizes 25,   32 and 50；Design: Block installation, 3/3 directional symbol control edges   P > A or A > T ； Mounting cavity, see page 14  ；Control spool with anti-rotation feature and control edges in   servo-performance quality  ；Pressure-resistant up to 315 bar  ； With inductive position transducer on main spool and pilot valve  ；Position-controlled with integrated electronics OBE.  ； These valves serve for closed-loop control of the magnitude   and direction of the flow.  ；Compley adjusted unit   ；Flow characteristics   M = Progressive with fine control edge  ；In case of an error in the OBE and pilot pressure applied   the main spool is opened in direction A towards T. P to A is   blocked then.