D663 MOOG servo valve

Parameters

Description

The D663-1922E-4 MOOG servo valve is a key component in electro-hydraulic servo control developed by MOOG. It is a hydraulic control valve that responds to analog electrical signals by modulating flow and pressure. This valve features fast dynamic response, high control accuracy, and long service life, making it widely used in electro-hydraulic servo control systems across industries such as aviation, aerospace, marine, metallurgy, and chemicals. Ningbo Bingsheng Industrial Technology Co., Ltd. ensures that all products are brand new and imported, prioritizing quality, integrity, and timely service!

Ordering Information

Advantages of MOOG Servo Valves

Significant improvement in flow utilization efficiency (over 90% of the pilot stage flow is utilized), helping to reduce energy consumption. This advantage is particularly prominent in machines using multiple servo proportional valves.

The pilot valve of the servo jet tube has a very high undamped natural frequency (500 Hz), resulting in a high dynamic response.

MOOG Servo Valve:

Pre-stage Performance Stability Screening:

Whether nozzle flapper type or jet pipe type, the pre-stage is based on the principle of jet flow, creating a jet flow field. Due to the high speed of the fluid ejected from the nozzle and jet pipe, and the small scale of the flow field, this jet flow field often experiences strong shear flow. In certain operating conditions, the servo valve may produce high-frequency noise accompanied by pressure fluctuations. The stability of the pre-stage performance directly affects the pressure zero drift, temperature zero drift, and jitter of the servo valve. To ensure the qualification rate of servo valve debugging, preliminary screening of pre-stage performance stability is necessary. This involves checking the pressure symmetry and stability of the two receiving chambers of the jet plate. As shown in Figure 7, p1 and p2 are the pressures in the two receiving chambers. During pre-stage screening, it is essential to ensure that the pressure difference between the two chambers of the nozzle or jet plate meets design requirements within the rated working pressure range and to control the amplitude of pressure fluctuations to avoid excessive pulsations during operation that could cause pre-stage instability.

MOOG Servo Valve:

Zero Position Adjustment

The zero position of the servo valve consists of hydraulic zero position, mechanical zero position, and electromagnetic zero position. The consistency of these zero positions directly impacts the static characteristics and adaptability of the servo valve, serving as the foundation for subsequent debugging. The adjustment sequence for the three zero positions is as follows: hydraulic zero position, mechanical zero position, and electromagnetic zero position.

The hydraulic zero position refers to the symmetrical control pressures in the left and right chambers of the servo valve's pre-stage under working pressure. When adjusting the hydraulic zero position, avoid having no force between the feedback rod ball and the valve core; the feedback rod ball should be separated from the valve core. When adjusting the nozzle or guide plate position, force should be applied slowly to avoid stress concentration. The mechanical zero position refers to the position of the valve core when the feedback rod is in a free state. During the debugging process, the mechanical zero position is adjusted by fine-tuning the gap between the base mounting screws and screw holes.

MOOG Servo Valve:

The controller features understandable parameter names organized in a user-friendly manner, with a reasonable design and layout that enhance functionality and flexibility.

The MOOG servo valve is directly driven by a high-torque permanent magnet linear motor-no pilot oil source is needed-and its dynamic performance is unaffected by pressure.

We provide advice and guidance to customers. We guarantee that our products are original imports and provide customs declarations and certificates of origin for MOOG servo valves. We welcome both new and returning customers!