关键词: 茶叶揉捻机, 揉捻压力, 压力检测, 运动仿真

Abstract: Tea rolling pressure is an important factor that affects the quality of tea rolling. Realtime detection of tea rolling pressure is the key to realize automatic tea processing. In this paper, based on the analysis of the force situation of the related components of the rolling pressure and the distribution of the rolling action area, the SW-DAMS coupling simulation method was used to analyze the contact mechanical characteristics and force changes of the sensing sensors corresponding to different rolling pressure detection methods, and the best detection point of the rolling pressure was located at the upper end of the gland. At the same time, the structure and measuring range of the pressure sensor were determined, and the rolling pressure detection device was designed to complete the pressure calibration and detection test. The results showed that when the standard rolling speed was 45 r/min, the selected annular pressure sensing sensor had an internal diameter of 32 mm, a height of 20 mm, connecting flange height 40 mm, a pressure output accuracy of 0.1%, and no overshoot. The productivity of the prototype was 65 kg/h, and the broken tea rate was 1%. The dynamic pressure changed in real time between 3-35 N with the rolling process, which could meet the requirements of automatic tea production line for testing the rolling pressure.

Key words:  tea twisting machine, rolling pressure, pressure detection, motion simulation