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阀门定位器的原理与结构标准

(Summary description)采用电一气阀门定位器后,可用电动调节器输出的0-10mA或4-20mADC电流信号去操纵气动执行机构。一台电一气阀门定位器具有电一气转换器和气动阀门定位器的双重作用。  如图所示是一台ZPD-2000的电-气阀门定位器的动作原理图和实物图。     (1)阀门定位器由永久磁钢1、导磁体2、线圈、衔铁(即主杠杆3)和工作气隙构成了力矩马达组件,它是将电流变为力(力矩)的转换元件。导磁体和衔铁用高导磁

阀门定位器的原理与结构标准

(Summary description)采用电一气阀门定位器后,可用电动调节器输出的0-10mA或4-20mADC电流信号去操纵气动执行机构。一台电一气阀门定位器具有电一气转换器和气动阀门定位器的双重作用。  如图所示是一台ZPD-2000的电-气阀门定位器的动作原理图和实物图。     (1)阀门定位器由永久磁钢1、导磁体2、线圈、衔铁(即主杠杆3)和工作气隙构成了力矩马达组件,它是将电流变为力(力矩)的转换元件。导磁体和衔铁用高导磁

Information
  采用电一气阀门定位器后,可用电动调节器输出的0-10mA或4-20mA DC电流信号去操纵气动执行机构。一台电一气阀门定位器具有电一气转换器和气动阀门定位器的双重作用。
  如图所示是一台ZPD-2000的电-气阀门定位器的动作原理图和实物图。
 
  
  (1)阀门定位器由永久磁钢1、导磁体2、线圈、衔铁(即主杠杆3)和工作气隙构成了力矩马达组件,它是将电流变为力(力矩)的转换元件。导磁体和衔铁用高导磁性能的坡莫合金制成。永久磁钢呈U形,其端部N、S两极罩在导磁体上。
  (2)当信号电流通过线圈时,由于电磁场和永久磁钢的相互作用,使主杠杆3受到一个向左的力,于是它绕支点16偏转,使挡板14靠近喷嘴15,喷嘴背压经放大器17放大后,送人薄膜执行机构9使阀杆向下移动,并带动反馈杆10绕支点5转动。
  (3)连在同一轴上的反馈凸轮6也作逆时针方向转动,通过滚轮11使副杠杆7绕支点8转动,将反馈弹簧12拉伸。
  (4)弹赞12对主杠杆的拉力与力矩马达作用在主杠杆上的力两者力矩平衡时,仪表便达到平衡状态。此时,一定的信号电流就被转换为一定的气压信号,并与阀门定位器的位置成精确的对应关系。
  (5)弹簧13是作调整零位用的。改变凸轮6的形状,可以改变输人电流信号与输出阀杆位移的对应关系。

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The

The working principle of valve positioner

Under the advancement of technology, we have developed a valve positioner to control the equipment in order to work more accurately. The valve positioner can be used in conjunction with various equipment. Using the valve positioner, we can understand a signal of the adjustment output in the equipment, so as to realize the control of the equipment. Although the use of valve positioners is very common in our lives, many people do not know much about the structure and working principle of valve positioners. Let's take a look at the working principle of the valve positioner together.
2020-01-19
Leaders

Leaders and technical experts from China National Offshore Oil Corporation visited Wuhan Tuoyou Intelligent Co., Ltd

On October 10th, leaders and technical experts from China National Offshore Oil Corporation (hereinafter referred to as CNOOC) visited Wuhan Tuoyou Intelligent Co., Ltd. to conduct research and technical exchanges on the application of TORLEO intelligent valve positioner in offshore operation platform.
2023-10-27

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