Application scope of 4WEH16 electro-hydraulic reversing valve

4WEH16 electro-hydraulic reversing valve is a high-performance directional control valve that combines electromagnetic control and hydraulic drive. It is widely used in hydraulic systems that require high-precision, rapid response and large flow control. Its core features include electromagnet drive, hydraulic pilot control, median functional diversity and high pressure/flow adaptability. The following are its specific application scope and analysis:

1. Core features and advantages

Electromagnetic-hydraulic composite control generates electromagnetic force through the electromagnetic force that drives the pilot valve core to move, and then the pilot hydraulic oil pushes the main valve core to redirect, realizing the function of low pressure control and low flow control and large flow.

Advantages: fast response speed (millisecond level), high control accuracy, low energy consumption (the electromagnetic power only requires a few dozen watts).

The diversity of median functions provides a variety of median functions (such as O-type, H-type, Y-type, etc.), and the system pressure holding, unloading or differential connection mode can be flexibly selected to meet different working conditions.

High pressure/flow adaptability The rated pressure is usually up to 31.5MPa, and the flow rate can reach hundreds of liters/minute, and is suitable for high-pressure and high-flow hydraulic systems.

The compact structure and modular design integrate solenoid, pilot valve and main valve into one, reducing leakage points and easy installation and maintenance; it supports the parallel combination of multiple valves to achieve complex logic control.

2. Main application areas

1. Engineering machinery

The excavator/loader controls the hydraulic cylinder action of the boom, stick, and bucket to achieve accurate excavation and loading.

Example: 4WEH16 is used to distribute the valve group, and the multi-channel actuator is controlled to work in concert through the solenoid switching.

The crane controls the hydraulic circuits of the amplitude, rotation and lifting mechanism to ensure smooth lifting and positioning of heavy objects.

Advantages: The median function can be selected as H type, which can realize the main pump unloading and reduce energy consumption.

The roller/paver controls hydraulic vibration/lifting of the vibrating wheel or screed, and the fast response characteristics of the 4WEH16 can reduce uneven road compaction or fluctuations in paving thickness.

2. Industrial automation equipment

CNC machine tools control clamping/release of hydraulic chucks, tailstock thimbles, and hydraulic balance of the spindle box.

Advantages: High-precision control can improve machining accuracy and reduce workpiece vibration.

The injection molding machine controls hydraulic circuits for mold clamping, injection, pressure holding and ejection operations, and the median pressure holding function of 4WEH16 (O-type) can prevent the reflow of melt.

The metal die casting machine controls the action of the injection cylinder and the opening and closing cylinder, and the high-pressure and high flow rate characteristics meet the needs of high-speed injection.

3. Metallurgy and mining equipment

The hydraulic system of blast furnace/converter controls mud guns and opening machines. The high-pressure resistance of 4WEH16 can adapt to harsh environments such as high temperature and dust.

The belt conveyor controls the hydraulic cylinder of the tensioning device to keep the belt tension stable and prevent slipping or deviation.

The hydraulic shearing machine controls the rapid drop and pressure holding of the shear cylinder, and the rapid response of 4WEH16 can improve the shear efficiency.

4. Ship and Marine Engineering

The servo system controls the steering hydraulic cylinder of the rudder blade, and the reliability and anti-pollution ability of 4WEH16 ensure the stability of the ship's handling.

The deck machinery controls the hydraulic circuits of cranes, anchors, and winches to adapt to vibration and salt spray corrosion in the marine environment.

The deep-sea detection equipment controls the hydraulic drive of the robotic arm, and the modular design of the 4WEH16 is convenient for compact installation.

5. Energy and Electrical Equipment

The wind turbine controls the hydraulic cylinder of the pitch system, and the rapid response of 4WEH16 can achieve accurate adjustment of the blade angle and optimize wind energy capture efficiency.

The hydraulic system of the hydropower station controls the gate opening and closing machine, and the high-voltage and high flow rate characteristics meet the driving needs of large gates.

Nuclear power plants control the hydraulic circuit of the containment spray system or coolant pump, and the reliability of the 4WEH16 complies with the nuclear safety standards.

6. Special application scenarios

The simulation test bench controls the hydraulic actuator of the flight simulator and the car driving simulator, and the high-frequency response of 4WEH16 can simulate real dynamic loads.

Fire-fighting equipment controls the hydraulic steering mechanism of the fire gun and quickly locates the fire source.

Military equipment controls the hydraulic system of tank turret rotation and armored vehicle lifting platform to adapt to harsh environments on the battlefield.

3. Precautions for selection and use

The matching pressure and flow rate requires the rated parameters of the valve to be selected according to the system's working pressure and flow rate to avoid leakage or jamming of the valve due to long-term overload operation.

The solenoid voltage and frequency confirm the power supply voltage (such as DC24V, AC110V) and signal type (PWM speed regulation or switch control) to ensure compatibility with the control system.

Media cleanliness hydraulic oil must meet the NAS level 6 or above cleanliness requirements to prevent particle contamination and cause valve core to be stuck or worn.

Environmental adaptability In high-temperature, low-temperature or corrosive environments, special sealing materials (such as fluoroelastomer) or surface treatment (such as nickel plating) must be selected.

Maintenance and fault diagnosis Regularly check the resistance of the solenoid coil and the sealing of the pilot valve, and judge the wear of the main valve core through pressure tests.

4. Technology development trends

Intelligently integrates the integrated pressure sensor and position feedback module to realize closed-loop control and improve the system's dynamic response accuracy.

The energy-saving design uses low-power electromagnets and variable pumps to supply oil to reduce system energy consumption.

The digital interface supports CAN bus or industrial Ethernet communication, which is convenient for linkage control with PLC or host computer.

Summarize

With its high-pressure, large flow rate, fast response, flexible control characteristics, 4WEH16 electro-hydraulic reversing valve has become the core hydraulic control component in the fields of engineering machinery, industrial automation, metallurgical ships, etc. Its application range covers from ground equipment to deep-sea devices, from conventional working conditions to extreme environments, and is a key component for modern hydraulic systems to achieve efficient, accurate and reliable operation. With the integration of intelligence and energy-saving technologies, its application scenarios will further expand to the fields of high-end manufacturing and new energy.