MOOG D661-4651伺服阀
1.产 品 资 料 介 绍：
- 先导式两级控制架构：MOOG D661-4651 采用 “先导级 + 主级” 两级设计，先导级为高性能比例电磁铁驱动的双喷嘴挡板阀，主级为大流量四通滑阀，通过先导级精准控制主级阀芯位移。相比直动式结构，可实现更大流量输出，同时借助机械反馈杆形成闭环控制，兼顾控制精度与功率密度，适配大型液压执行机构（如船舶舵机、锻压设备油缸）。
- 模块化油口与安装设计：阀体采用 ISO 4401 标准安装底面，支持多种油口配置（如 P、T、A、B 四口标准布局及可选第五油口），可直接替换传统伺服阀或比例阀，无需改造液压系统阀块。部分型号提供法兰式安装选项，适配不同设备的空间布局需求，降低集成难度。
- 抗污染与维护优化结构：主级阀芯与阀套采用 AISI 4140 合金钢材，经精密珩磨处理，配合间隙控制在 2-3μm，表面镀硬铬提升耐磨性；先导级内置 20μm 精密过滤器，可过滤液压油中微小杂质，减少阀芯卡滞风险。同时设计可拆卸式先导级组件，无需拆解主阀体即可更换先导部件，缩短维护时间。
- 高压大流量输出能力：最大工作压力可达 35MPa，在 7MPa 阀压降条件下，额定流量覆盖 50-200L/min（具体视阀芯规格），能为重型液压设备提供充足动力。即便在高压差（25-35MPa）工况下，仍可保持流量输出线性度，适配大型工程机械、冶金轧机等大负载场景。
- 高频响与动态响应特性：频率响应达 30-50Hz（±100% 输入信号），100% 阶跃响应时间≤25ms，先导级比例电磁铁采用低磁滞设计，配合主级阀芯的低摩擦特性，可快速跟随控制指令调整流量，有效抑制液压系统的动态滞后，保障高速运动设备（如高速冲床）的控制稳定性。
- 高精度比例控制指标：流量滞环误差低于 0.8%，线性度优于 1%，通过机械反馈杆实现阀芯位移与输入信号的精准对应。最小可控流量偏差≤0.5%，在低速、低流量微调场景（如精密压力控制、同步运动系统）中，可实现微米级位移控制，满足高端制造设备需求。
MOOG D661-4651伺服阀 英文资料：
1、 Infrastructure and Design Characteristics
Pilot controlled two-stage control architecture: MOOG D661-4651 adopts a two-stage design of "pilot stage+main stage". The pilot stage is a high-performance proportional solenoid driven dual nozzle baffle valve, and the main stage is a large flow four-way slide valve, which precisely controls the displacement of the main stage valve core through the pilot stage. Compared to direct acting structures, it can achieve greater flow output and form closed-loop control with the help of mechanical feedback rods, balancing control accuracy and power density, and is suitable for large hydraulic actuators such as ship servos and forging equipment cylinders.
Modular oil port and installation design: The valve body adopts the ISO 4401 standard installation bottom surface, supporting multiple oil port configurations (such as P, T, A, B four port standard layout and optional fifth oil port), which can directly ｒｅｐｌａｃｅ traditional servo valves or proportional valves without the need to modify the hydraulic system valve block. Some models offer flange installation options to meet the spatial layout requirements of different devices and reduce integration difficulty.
Anti pollution and maintenance optimization structure: The main valve core and valve sleeve are made of AISI 4140 alloy steel, which has undergone precision honing treatment, and the clearance is controlled at 2-3 μ m. The surface is plated with hard chromium to improve wear resistance; The pilot stage is equipped with a 20 μ m precision filter, which can filter out small impurities in hydraulic oil and reduce the risk of valve core sticking. Simultaneously design detachable pilot stage components, which can ｒｅｐｌａｃｅ pilot components without disassembling the main valve body, reducing maintenance time.
2、 Core performance and control accuracy
High pressure and high flow output capability: The maximum working pressure can reach 35MPa, and under the condition of 7MPa valve pressure ｄｒｏｐ, the rated flow covers 50-200L/min (depending on the valve core specifications), which can provide sufficient power for heavy-duty hydraulic equipment. Even under high pressure differentials (25-35MPa), the flow output linearity can still be maintained, making it suitable for large load scenarios such as construction machinery and metallurgical rolling mills.
High frequency response and dynamic response characteristics: The frequency response reaches 30-50Hz (± 100% input signal), with a 100% step response time of ≤ 25ms. The pilot stage proportional electromagnet adopts a low hysteresis design, which, combined with the low friction characteristics of the main stage valve core, can quickly follow the control instructions to adjust the flow rate, effectively suppressing the dynamic hysteresis of the hydraulic system and ensuring the control stability of high-speed moving equipment (such as high-speed punching machines).
High precision proportional control indicators: flow hysteresis error is less than 0.8%, linearity is better than 1%, and precise correspondence between valve core displacement and input signal is achieved through mechanical feedback rod. The minimum controllable flow deviation is ≤ 0.5%. In low-speed and low flow fine-tuning scenarios (such as precision pressure control and synchronous motion systems), micrometer level displacement control can be achieved to meet the requirements of high-end manufacturing equipment.
MOOG D661-4651伺服阀 产品展示
产品视频
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The content is from Ruichang Mingsheng Automation Equipment Co., LTD
Contact: +86 15270269218
