排灌机械工程学报
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排灌机械工程学报  2019, Vol. 37 Issue (4): 358-362    DOI: 10.3969/j.issn.1674-8530.17.0226
排灌装备制造技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
涌泉根灌灌水器外壳材料对水力性能的影响
陈瑞1,朱德兰1,2*,吴守军1,张林2,3
1. 西北农林科技大学水利与建筑工程学院, 陕西杨凌712100; 2. 西北农林科技大学中国旱区节水农业研究院, 陕西杨凌 712100; 3. 西北农林科技大学水土保持研究所, 陕西杨凌 712100
Effects of shell material characteristics on hydraulic performance of bubbled-root emitter
CHEN Rui1,ZHU Delan1,2*,WU Shoujun1,ZHANG Lin2,3
1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2. Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China; 3. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
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摘要 对使用ABS、纯HDPE、HDPE+20%EVA、LDPE+20%EVA以及40%HDPE+40%LDPE+10%LLDPE+10%EVA这5种不同外壳材料制造的涌泉根灌灌水器,从外壳材料的收缩率、弹性模量、拉伸应变特点等方面研究了外壳材料对涌泉根灌灌水器出流特性的影响.结果表明,外壳材料对涌泉根灌灌水器的水力性能影响明显:外壳材料的模塑收缩率越大,灌水器外壳与内芯流道贴合越紧密,流量就越小;灌水器外壳的刚性越强,即材料的弹性模量越大,不同压力作用下灌水器的流量相差越小;相同制造工艺下,外壳材料的自然回弹率影响灌水器的制造偏差,材料的回弹性越好,得到的灌水器流量偏差越小.因此,为了得到制造偏差小、水力性能良好的涌泉根灌灌水器,对外壳材料的选配应平衡刚性及自然回弹性.推荐使用混合材料40%HDPE+40%LDPE+10%LLDPE+10%EVA用以制备涌泉根灌灌水器外壳.
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陈瑞
朱德兰
*
吴守军
张林
关键词涌泉根灌灌水器   外壳材料   水力性能   制造偏差   材料性能     
Abstract: The hydraulic performance of emitters with different shell materials should be investigated. The bubbled-root emitters made by 5 kinds of shell materials(ABS, HDPE, HDPE+20%EVA, LDPE+20%EVA, 40%HDPE+40%LDPE+10%LLDPE+10%EVA)were selected. The effects of shell material characteristics, such as shrinkage, modulus and tensile deformation on hydraulic performance were tested. The results showed that the effects of shell materials physical properties on emitter out-flow were significant. The larger the molding shrinkage of the shell material is, the closer the inner diameter of emitter shell is. Thus, the labyrinth channel fitted more closely to the shell, which led to a decrease of emitter flow rate. The shell material with better rigidity had stronger ability to resist the external deformation. Consequently, emitter flow rate was more stable as the pressure head increased. The emitter shell with better nature rebound resilience had lower manufacturing variation under the same manufacturing process. Therefore, in order to obtain a bubbled-root emitter with better hydraulic performance, the selection of emitter shell material should balance the rigidity and nature rebound resilien-ce. In this study, the most appropriate material for bubbled-root emitter shell is 40%HDPE+40%LDPE+10%LLDPE+10%EVA.
Key wordsbubbled-root emitter   shell material   hydraulic performance   manufacturing variation   material characteristics   
收稿日期: 2017-10-12;
引用本文:   
陈瑞,朱德兰,*等. 涌泉根灌灌水器外壳材料对水力性能的影响[J]. 排灌机械工程学报, 2019, 37(4): 358-362.
CHEN Rui-,ZHU De-Lan-,* et al. Effects of shell material characteristics on hydraulic performance of bubbled-root emitter[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(4): 358-362.
 
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