Welcome to the official website of Shanghai Radk-Tech Hydraulic Control System Co., Ltd.
-
ABOUT USDedicated to building a company that integrates product R&D, intelligent manufacturing, sales and technical services.
-
PRODUCTSMain business includes high-end hydraulic components such as electro-hydraulic servo valves, proportional valves, proportional multi-way valves, high-performance threaded cartridge valves, balancing valves, and hydraulic integrated valve groups.
-
APPLICATIONIn the future, Norma Hydraulics will continue to strive forward, aiming to become a significant manufacturer in the high-end hydraulic components segment of the global hydraulic industry.
-
-
RT6615E（D661&D661GC）
- Product Description
-
Servo Proportional Valve
Features and Benefits
High flow acceptance efficiency (more than 90% of the pilot stage flow is utilized), resulting in lower energy consumption
High dynamic response of the valve due to the high undamped natural frequency of the jet pipe pilot stage
Reliable performance, high pressure recovery capability of the jet pilot stage (more than 80% of the pressure recovery capability when the
rated signal is input), thus providing a larger driving force to the power stage spool and improving spool position accuracy
The minimum control pressure of the pilot stage is only 25 bar, so it has the advantage that it can be used for low-pressure systems such as turbine control.
The high f requency response of t his s eries of v alves and t he good p osition a ccuracy of t he p ower s tage slide v alve c an improve t he s tatic performance of the control system.
The pilot stage control oil can be controlled and discharged externally by X and Y port selection due to the large flow rate valve body flow path design.
The main spool has a reduced driving area and has the following advantages:
High dynamic response with small pilot stage flow rate, which also enables fast spool movement
Position electrical feedback with LVDT
For fail-safe type proportional valves, the slide valve can be reliably secured in a safe position by spring, seating valve, or cutting off external oil pressure.The RT661 series has two-stage and three-stage configurations, and the power-stage slide valve is driven by a single-stage or two-stage pilot
servo valve. The two-stage RT661 series valves are mainly used in small signal requirements with The two-stage RT661 series valves are mainly
used in systems requiring high resolution and high dynamic response at small signals, while the three-stage valves are suitable for applications
requiring high dynamic response at larger command signals.The output flow rate of the valve is related to the input command electrical signal and the pressure drop at the throttle of the valve. For a given valve
pressure drop, the output flow rate of the valve can be calculated by the following equationModel RT6615E-... The valve can be used as a two-way, three-way and four-way throttle type flow control valve, the choice of jet pipe type
pilot control stage, with excellent anti-pollution characteristics, and very good dynamic characteristics, suitable for closed-loop control of
position, force and speed.
Structure:
The valve consists of the following parts
-Injector pilot stage: torque motor (1), injector tube (3) and receiver (5)
-Power stage: spool (6), sleeve (7), etc.
-Built-in amplifier (9)
RT6615E
Working Principle:
-In the torque motor (1) coil (2) input an electrical signal, will produce electromagnetic force to make the jet tube (3) on the nozzle (4) deflection, the
tube out of most of the oil shot to the side of the receiver, and the receiver of the other - side to accept the flow of reduced, thus changing the pressure
of the two ends of the spool (6) connected to the cavity, the pressure difference to the spool (6) displacement, the oil port P to A (or B) and B (or A) to T
open, the pilot stage drain from the nozzle (4) ring around the discharge, back to the tank. The pilot stage drain is discharged from the nozzle (4) around
the ring and back to the oil tank.
-The spool (6) position is controlled by the built-in amplifier (9) and the signal feedback from the displacement sensor (8) connected to the spool to
achieve closed loop control.
-When the command signal is input, the spool with the displacement sensor produces displacement, and the modulation and demodulation
line of the displacement sensor detects the actual displacement of the spool and outputs it in the form of a voltage proportional to the
displacement, and feeds it back to the control circuit to compare with the command signal until the displacement output signal is equal to the
command signal and the deviation signal is zero, then the jet pipe (3) returns to the neutral position and the spool stops moving. The spool
output flow is proportional to the command signal.
Product Description
Keywords
Related Products
No relevant data yet, please add it from the backend!
Service Hotline：
+86 400 997 5058
Telephone：+86-21-54832120
Address：3229 Jindu Road, Minhang District, Shanghai
WeChat ID：RADK-TECH
Email： info@radk-tech.com
Douyin QR code
