WIKA波登管壓力表其結(jié)構(gòu)和工作原理是什么？

WIKA波登管壓力表其結(jié)構(gòu)和工作原理是什么？

波登管壓力表是最常用的機械壓力測量儀表。其壓力元件通常被稱為波登管：它是基于彈性彈簧，c形的，彎曲且具有橢圓形的橫截面的管。

波登管壓力表的結(jié)構(gòu)

當波登管的內(nèi)部空間受壓時，橫截面朝向圓形改變。在該過程中產(chǎn)生的環(huán)向應(yīng)力增加了C形管的半徑。由此，管的末端移動了大約兩到三毫米。這個偏轉(zhuǎn)就是壓力的量度。壓力被轉(zhuǎn)換為位移，這個位移將線性偏轉(zhuǎn)轉(zhuǎn)變?yōu)樾D(zhuǎn)位移，并通過指針使其在刻度上可視。

壓力對波登管的影響

波登管的種類

使用C形彎曲的波登管，可以顯示高達6MPa的壓力。對于更高的壓力，可使用螺旋形波登管。根據(jù)幾何形狀、材料和材料厚度的不同，可顯示高達700MPa的壓力。根據(jù)要求，壓力元件可選擇銅合金、不銹鋼或如蒙乃爾等特殊材料制成。

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.