Manufacturing method for asymmetric ripple pressure transmission assembly

Abstract

The invention discloses a manufacturing method for an asymmetric ripple pressure transmission assembly. The method is characterized in that the assembly comprises a ripple diaphragm and a spherical foundation. The method comprises steps of molding the ripple diaphragm, designing and processing the spherical foundation, welding the diaphragm with the foundation, detecting leakage and testing displacement. The high-precision spherical foundation is designed with the profile tolerance smaller than 0.008mm, precise positioning laser is employed for welding, the seam welding place is more than 1.5+ / -0.5mm away from the diaphragm rippling place, the coaxiality of the diaphragm after welding of the foundation is smaller than 0.05mm, under the condition of the 2KPa pressure, the center displacement reaches 0.7+ / -0.1mm. According to the assembly, perfect fit of the ripple diaphragm and the spherical foundation is realized, the fill liquid volume is reduced to the maximum degree, additional acting force of the diaphragm caused by low and high temperature and exerted on a pressure-sensitive system is reduced, displacement during the high temperature is guaranteed to be enough, and the response scope during the low temperature is guaranteed to be enough.

Description

technical field [0001] The invention relates to the field of intelligent pressure transmitters, in particular to an asymmetric corrugated pressure transmission component. Background technique [0002] The intelligent pressure transmitter is a very important process measuring instrument in the field of industrial automation control. It transmits the pressure of the measured medium to its measuring unit through the pressure-sensitive component, and then converts the signal into a standard signal. It is widely used in the measurement of fluid pressure, flow, liquid level, density and other parameters. The pressure transmitter is divided into several key units such as electrical components, measurement units and pressure transmission components. The pressure transmission component is composed of a corrugated diaphragm and a base. After the pressure transmission component is assembled with the bellows body, the corrugated diaphragm senses the pressure and then transmits the pres...

AI Technical Summary

Problems solved by technology

The movement of the diaphragm outward will cause the additional pressure generated by the diaphragm to act on the sensor, resulting in a change in the output of the sensor; when the diaphragm is retracted, the same is true

If the filling liquid is too much, it will cause the plastic deformation of the diaphragm at a higher ambient temperature, resulting in the failure of the pressure transmission system. On the contrary, if the designed oil filling is not enough, it will cause the sensor to have insufficient response range at low temperature so that it cannot be fully charged. Range output

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