What is the structure and working principle of a wika Bourdon tube pressure gauge?

What is the structure and working principle of a wika Bourdon tube pressure gauge?

The Bourdon tube pressure gauge is the most commonly used mechanical pressure measuring instrument. Its pressure component is commonly referred to as a Bourdon tube: it is based on an elastic spring, a C-shaped, curved tube with an elliptical cross-section.

Structure of Bourdon tube pressure gauge

When the internal space of the Bourdon tube is compressed, the cross-section changes towards a circular shape. The circumferential stress generated during this process increases the radius of the C-shaped pipe. As a result, the end of the tube moved by approximately two to three millimeters. This deflection is a measure of pressure. Pressure is converted into displacement, which converts linear deflection into rotational displacement and makes it visible on the scale through a pointer.

The influence of pressure on the Bourdon tube

Types of Bourdon tubes

The use of C-shaped curved Bourdon tubes can display pressures up to 6MPa. For higher pressures, spiral bourdon tubes can be used. Depending on the geometric shape, material, and material thickness, a pressure of up to 700MPa can be displayed. According to requirements, pressure components can be made of copper alloy, stainless steel, or special materials such as Monel.

笔记

wika波登管压力表其结构和工作原理是什么？

波登管压力表是最常用的机械压力测量仪表。其压力元件通常被称为波登管： 它是基于弹性弹簧，c形的，弯曲且具有椭圆形的横截面的管。

波登管压力表的结构

当波登管的内部空间受压时，横截面朝向圆形改变。在该过程中产生的环向应力增加了C形管的半径。由此，管的末端移动了大约两到三毫米。这个偏转就是压力的量度。压力被转换为位移，这个位移将线性偏转转变为旋转位移，并通过指针使其在刻度上可视。

压力对波登管的影响

波登管的种类

使用C形弯曲的波登管，可以显示高达6MPa的压力。对于更高的压力，可使用螺旋形波登管。根据几何形状、材料和材料厚度的不同，可显示高达700MPa的压力。根据要求，压力元件可选择铜合金、不锈钢或如蒙乃尔等特殊材料制成。