Hydraulic pump proportional solenoid valve 114-0616 excavator engineering machinery accessories

    Proportional solenoid valve is a special control solenoid valve, its control principle is to control the opening of the valve through the external input command signal, so that the control flow and pressure always maintain the same proportion as the command signal. It uses a "position feedback" technology, which can accurately adjust the position of the valve according to the flow control signal, so as to achieve accurate control requirements, so it is widely used in accurate hydraulic system control.

   The basic principle of electro-hydraulic proportional valve control is based on the principle of the solenoid switch valve: When the power is off, the spring presses the core directly on the seat, causing the valve to close. When the coil is energized, the electromagnetic force generated overcomes the spring force and lifts the core, thus opening the valve. The proportional solenoid valve makes some changes to the structure of the solenoid valve: it creates a balance between the spring force and the electromagnetic force under any coil current. The size of the coil current or the size of the electromagnetic force will affect the plunger stroke and valve opening, and the valve opening (flow) and the coil current (control signal) is an ideal linear relationship. Direct acting proportional solenoid valve flows under the seat. The medium flows in from under the seat, and the direction of the force is the same as the electromagnetic force, and the opposite of the spring force. Therefore, it is necessary to set the Zda and Z small flow values corresponding to the working range (coil current) in the working state. The proportional solenoid valve of the Drey fluid is closed when the power is off. The basic principle of the electro-hydraulic proportional valve control Italy ATOS solenoid valve is used to control the automatic basic components of the fluid, which belongs to the actuator; And not limited to hydraulic, pneumatic. The ATOS solenoid valve consists of a solenoid coil and a magnetic core and a valve body containing one or more holes. When the coil is powered on or off, the movement of the magnetic core will cause the fluid to pass through or be cut off to achieve the purpose of changing the direction of the fluid. The electromagnetic parts of the ATOS solenoid valve are composed of fixed iron core, moving iron core, guide sleeve coil and other parts; The valve body part is composed of a valve core, a valve sleeve, a spring, a seat, etc. The electromagnetic components are mounted directly onto the valve body for a simple, compact package. In the production of commonly used solenoid valves are two two, two three, two four, two five, three five, etc.