MOOG D634-319C* MOOG DDV Servo Valve
LEHIY item code: LH-MOOG-0008
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MOOG D634-319C*Moog DDV Servo Valve: A high-performance MOOG servo valve made of aluminum. The DDV servo valve is a product of the American brand MOOG. The MOOG DDV servo valve is one of our better-performing servo valve models.
Popular models include the D634-319C series, with sales of at least 10 units per week. Price: 20,000 (including tax). In stock.
This price includes 13% tax and shipping. Welcome to inquire! MOOG DDV Servo Valve D634-319C in stock *Refurbished products not accepted*.
10 units of MOOG D634-319C servo valve with aviation connector in stock: MOOG servo valves are mainly used as actuators in electro-hydraulic servo systems (see Hydraulic Servo Systems).
In servo systems, hydraulic actuators, compared to electric and pneumatic actuators, offer advantages such as faster response, higher power output per unit weight, smoother transmission, and stronger anti-interference capabilities. On the other hand, electrical components are frequently used in servo systems for signal transmission and characteristic correction.
Therefore, modern high-performance servo systems also employ electro-hydraulic methods, making servo valves essential components. Moog's DDV servo valve has a relatively complex structure, high cost, and stringent requirements for oil quality and cleanliness.
New servo valves are attempting to overcome these drawbacks, for example, by utilizing electrostrictive elements, which significantly simplify the structure. Another direction is the development of special working oils (such as electroviscous oils). These oils can change their viscosity coefficient under electromagnetic influence.
This property allows for direct control of oil flow via electrical signals. Moog electro-hydraulic servo valves, primarily referring to those from the United States, receive electrical analog signals and output modulated flow and pressure accordingly.
They function as both electro-hydraulic conversion and power amplification elements, converting weak electrical input signals into high-power hydraulic energy (flow and pressure) output. servo system control.
A typical Moog servo valve consists of a permanent magnet torque motor, nozzle, baffle, valve core, valve sleeve, and control chamber (see figure).
When current flows through the input coil, the baffle moves to the right, strengthening the throttling effect of the right nozzle, reducing flow, and increasing the back pressure on the right side; simultaneously, it reduces the throttling effect of the left nozzle, increasing flow and decreasing the back pressure on.
the left side.
The forces at both ends of the valve core become unbalanced, causing the valve core to move to the left. High-pressure oil flows from S to C2, delivering it to the load. Load return oil flows through C1 and into the oil tank.
The displacement of the valve core is proportional to the input current of the torque motor.
The hydraulic pressure acting on the valve core is balanced by the spring force. reversed, the flow rate is also reversed. The table shows the classification of MOOG servo valves from the United States.
MOOG servo valves are mainly used as actuators in electro-hydraulic servo systems (see Hydraulic Servo Systems). In servo systems, hydraulic actuators, compared with electric and pneumatic actuators, have advantages such as faster speed, higher output power per unit weight, smoother transmission, and stronger anti-interference ability.
On the other hand, electrical components are often used for signal transmission and characteristic correction in servo systems. Therefore, modern high-performance servo systems also adopt electro-hydraulic methods, and MOOG servo valves (DDV valves) are essential components of such systems.
Servo valves have a relatively complex structure, high cost, and high requirements for oil quality and cleanliness. New types of servo valves are attempting to overcome these disadvantages, such as servo valves using electrostrictive elements, which greatly simplify the structure.
Another direction is the development of special working oils (such as electroviscous oils).
This type of working oil can change its viscosity coefficient under electromagnetic influence. analog control components of the electro-hydraulic servo valve to achieve digital control.
With the development of microelectronics, control components can be installed inside the valve body, and the valve's performance can be controlled by a computer program to achieve functions such as digital compensation. However, analog circuits are prone to zero drift and temperature drift, requiring a D/A converter interface.
Second, there is the direct-acting digital control valve. This uses a stepper to drive the valve core, converting motor the input signal into a stepping signal to control the servo valve's flow output.
This valve has advantages such as compact structure, open-loop controllable speed and position, and direct digital control, and is widely used.
However, in applications with high real-time control requirements, conventional stepping methods cannot simultaneously meet the requirements of quantization accuracy and response speed. Zhejiang University of Technology adopted a continuous tracking control method to eliminate the contradiction between the two and achieve excellent dynamic characteristics.
In addition, various control methods, such as direct drive of the valve core by a DC torque motor to achieve digital control, or changes to the servo valve structure, have resulted in numerous digital MOOG servo valve products.
With the development of various technologies, a new type of intelligent MOOG servo valve has been developed by using new sensors and computer technology, integrating mechanical, electronic, sensor, and computer self-management (fault diagnosis and troubleshooting).
This type of servo valve can determine the control target according to the system requirements: speed, position, acceleration, force, or pressure.
The same MOOG servo valve can be set as a flow control MOOG servo valve, a pressure control servo valve, or a flow/pressure composite control servo valve according to control requirements.
Furthermore, the control parameters of the MOOG servo valve, such as flow gain, flow gain characteristics, and zero point, can be set according to the principle of control performance optimization.
The diagnostic information and key control parameters (including operating environment parameters and The download and updating of servo valve control parameters can even be performed while the host is running.
In the development of technologies for matching servo valves with control systems, embedded technology has become a reality for servo valves.
a servo valve with optimized control parameters based on specific customer application requirements, and having the valve's own control system complete the corresponding control tasks (such as synchronous control of each control axis), before embedding it into the entire large control system.
Considering current technological developments and the requirements of control systems for Moog servo valves, the self-diagnostic and self-testing functions of Moog servo valves should see further development.
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| Brand Name: | MOOG | Certification: | ISO9001, CE |
|---|---|---|---|
| Place of Origin: | China | Condition: | New |
| Warranty: | 1 year | Customized sourcing: | available |
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MOOG D634-319C* MOOG DDV Servo Valve
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