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阀门定位器不能校准的解决方法

(Summary description)阀门定位器在实际工作中有时会遇到用常用的调校方法不能校准定位器,这是因为:在一般情况下,零位弹簧工作在线性区域,其长度变化范围有限,调量程机构其机械位置受到限制,所以调零弹簧长度和量程调整机构的放大系数值将会受到限制。此时,如果调一台调节阀的放大系数很大或很小的调节阀,就很难将其定位器校准。即常用的调校法失效了。而由(4)式可知,我们可以调节的参数还有零位弹簧的弹性系数和反馈杠杆的有效长度,由于调

阀门定位器不能校准的解决方法

(Summary description)阀门定位器在实际工作中有时会遇到用常用的调校方法不能校准定位器,这是因为:在一般情况下,零位弹簧工作在线性区域,其长度变化范围有限,调量程机构其机械位置受到限制,所以调零弹簧长度和量程调整机构的放大系数值将会受到限制。此时,如果调一台调节阀的放大系数很大或很小的调节阀,就很难将其定位器校准。即常用的调校法失效了。而由(4)式可知,我们可以调节的参数还有零位弹簧的弹性系数和反馈杠杆的有效长度,由于调

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  阀门定位器在实际工作中有时会遇到用常用的调校方法不能校准定位器,这是因为:在一般情况下,零位弹簧工作在线性区域,其长度变化范围有限,调量程机构其机械位置受到限制,所以调零弹簧长度和量程调整机构的放大系数值将会受到限制。此时,如果调一台调节阀的放大系数很大或很小的调节阀,就很难将其定位器校准。即常用的调校法失效了。而由(4)式可知,我们可以调节的参数还有零位弹簧的弹性系数和反馈杠杆的有效长度,由于调零弹簧常在线性区域内工作,所以在这里只讨论通过改变反馈杠杆的有效长度来校验阀门定位器。我们可以将连接在阀杆上的销钉靠近阀门定位器,这样就将反馈杠杆的有效长度缩短,即减小,L增大,行程也增大,反之, 可将反馈杠杆的有效长度增长,则其行程减小。因此,将此方法配合常用的调校法可增大行程变化范围,易于阀门定位器的校准。
  用调反馈杠杆法来校准阀门定位器的步骤如下:
  a.输入4mA.DC信号,按常用的调零法调零点;
  b.输入20mA.DC信号,按常用调量程法调节量程;
  c.反复进行a,b步;
  d.若零点、量程无法校准,调整阀杆上的销钉以改变反馈杠杆的有效长度,使行程增大或减小,杠杆有效长度缩短,行程增大;反之,行程减小。
  e.反复进行以上步骤,直到零点、量程均达到要求即可。

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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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