Pressure column pressure wheel axle structure with built-in pressure sensors

Abstract

The invention provides a pressure column pressure wheel axle structure with built-in pressure sensors. The pressure column pressure wheel axle structure comprises a pressure wheel axle body; two sensor holes which are coaxial but do not communicate with each other are formed in the pressure wheel axle body in the radial direction; a radial line penetrating hole which connects the two sensor holes in series is formed between the two sensor holes; and an axial line penetrating hole is formed from one end of the pressure wheel axle body to one of the sensor holes or the radial line penetrating hole in the axial direction. A pressure strain gauge is pasted on the side wall of each sensor hole; and two wires penetrate into the axial line penetrating hole from one end of the pressure wheel axle body and are welded to connectors of the two pressure strain gauges correspondingly. The pressure strain gauges are adopted as the pressure sensors, and the characteristics of large sensitivity coefficients and minimal mechanical lag are achieved; the pressure sensors and a pressure wheel axle are manufactured into a whole, the structure is concise, the size is small, and mounting is convenient; and a mechanical connection structure of a traditional sensor is omitted, the error caused by mechanical connection is avoided, the precision of pressure detection is improved, and the feedback speed of pressure detection is increased.

Description

technical field [0001] The invention relates to a pressure column pressure wheel shaft structure with a built-in pressure sensor, which is suitable for the pressure column device of a rotary tablet press used in the production of pharmaceutical and food industries. Background technique [0002] The rotary tablet press is a multi-punch tablet press developed on the basis of a single-punch tablet press that can continuously complete a series of actions such as filling, pressing, and pushing. Because of its small vibration, low noise, low energy consumption, high output, stable quality and suitable for large-scale production, it has been widely used at home and abroad, and has become the main mechanical equipment for tablet production. [0003] In the existing rotary tablet press, the pressure sensor of the pressure column used is an independent component, and the pressure sensor is mechanically connected with the pressure wheel shaft by a connecting rod. This pressure sensor ...

AI Technical Summary

Problems solved by technology

[0004] 1. The assembly structure is relatively complicated, and the installation of the pressure sensor in the pressure column is cumbersome;

[0005] 2. The mechanical connection link in the middle will affect the accuracy of pressure detection;

[0006] 3. During the pressure detection process, the pressure sensor still has mechanical hysteresis, and the pressure detection value cannot be fed back in time

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