The pressure-displacement conversion relationship of the vacuum pressure switch

The pressure-displacement conversion relationship of vacuum pressure switches is mainly based on the deformation characteristics of sensitive components (such as diaphragms, bellows, pistons, etc.) under pressure. The following is a specific analysis:

When the pressure within the vacuum system changes, the sensitive element will be subjected to the pressure and undergo corresponding displacement. Take the diaphragm as an example. When the pressure inside the system decreases (the vacuum degree increases), the diaphragm will dent towards the vacuum side. When the pressure inside the system rises (the vacuum degree decreases), the diaphragm will bulge in the opposite direction. There is a certain corresponding relationship between this displacement and pressure. Generally, the greater the pressure change, the greater the displacement of the sensitive element.

The displacement of the sensitive element is amplified and transmitted through mechanical transmission mechanisms such as levers and springs. The lever can amplify the slight displacement of the sensitive element to trigger the subsequent control device more effectively. The spring plays a role in balancing and reset. When the system pressure returns to normal, the elastic force of the spring will restore the sensitive components and mechanical transmission mechanism to their initial positions.

The mechanical transmission mechanism transmits the amplified displacement to the microswitch, which controls the on-off state of the circuit based on the magnitude of the displacement. When the displacement reaches a certain level, the contacts of the microswitch will act, thereby achieving the conversion of pressure - displacement - electrical signal.