基于工业机器人的自动取袋称量装置的设计

针对包装流程中取袋称量自动化程度低,取袋装置与称量装置各自独立、结构分散、功能不集中的问题,提出了一种基于工业机器人的自动取袋称量的方案。设计出了可配合机器人的末端执行器,并同时实现取袋与称量功能的装置。通过对工业机器人的移动路径进行合理设计,将装置移动到指定位置,采用气缸控制装置的张开闭合,完成取袋动作,运用称量传感器,实现称量功能。该装置与工业机器人配合使用,提高了包装机的自动化水平,实现了取袋与称量的结构与功能的统一。     

Laser surface texturing and numerical simulation of heat flux on Cr2AlC MAX phase heat exchangers

The energetic worldwide emergency demands a significant drop in fossil energy to renewable energies as part of the sustainable solutions for global energy consumption. MAX phase materials, such as Cr₂AlC, are potential candidates for heat exchanger applications due to their excellent oxidation and corrosion resistance, good thermal shock response and relatively high thermal conductivity. This study uses laser surface texturing (LST) technology to design plate heat exchanger patterns on the Cr₂AlC MAX phase. Furthermore, performing numerical simulations on textured plate models under molten salt conduction and convection conditions, accessing temperature gradient and heat transfer behaviour were conducted on Cr₂AlC, as well as on 316 L stainless steel and alumina for comparison. As a result, combined microtextures with a corrugated surface and spaced V-shape channels were obtained using LST in a single step. The parametric study indicated that the optimal channels (groves) were found for 25 W in air and 20 s laser conditions, with approximately 145 µm width and 340 µm depth. Furthermore, the numerical simulation showed that ceramics materials present better heat transfer conditions than 316 L stainless steel, where Cr₂AlC and alumina only differ in 1.9% heat flux. In addition, the corrugated surface plate with 2.6% width of the total thickness increases heat transfer by 9.8%.     

Photoelectrochemical performance of bismuth vanadate photoanode for water splitting under concentrated light irradiation

Photoelectrochemical (PEC) water splitting is a promising way to convert solar energy into hydrogen energy. It is typically carried out at room temperature (RT) and 1 sun illumination. The PEC water splitting under concentrated light is expected to be an effective route to improve PEC performance, but there are few studies on it. Herein, CoPi/Mo:BiVO₄ photoanode was selected to investigate the effect of concentrated light and the reaction temperature on its PEC performance. It was revealed that CoPi/Mo:BiVO₄ showed enhanced PEC performance under concentrated light. The photocurrent density was enhanced with increased light intensity and increased reaction temperature. At a high temperature (60 °C), the normalized photocurrent density (3.31 mA cm⁻² at 1.23 V vs. RHE) was found to be optimal at 4 suns, which was attributed to the synergistic effect of concentrating light and heating. It is proved that concentrated light can effectively improve the PEC performance, which has important guiding significance to realize the low-cost and efficient PEC water splitting.     

酒精浓缩废水对SCP菌体培养的影响

研究了浓缩废水对菌体培养的影响，发现用间歇培养的方法难以较清楚的表明废水的浓缩与菌体培养之间的关系；用连续培养方法发现，在一定的稀释率的条件下，废水浓缩一倍，菌体浓度增加一倍，反应器生产能力也增加一倍。