矿用芳纶增强体输送带的研究与开发

发布时间：2018-08-03 16:21

【摘要】：煤矿生产中,带式输送机是一种主要的运输设备,而输送带是带式运输机的重要组成部分,输送带起着承载以及运输物料的作用。输送带是一种复合制品,主要组成部分有带芯骨架材料和基体材料,带芯骨架材料一般为纤维、金属或者织物,基体材料一般为橡胶或者塑料。材料和结构的选择影响着输送带的整体性能,包括力学性能、使用寿命、应用场所等。随着我国煤炭运载量的增大,运载效率的不断提高,对输送带的需求也随之升高,同时对质量的要求也相应提高。输送带的动力传递以及物料运输,最重要的特性便是输送带的强力,因此提高其强力便成为目前输送带发展的主要方向。芳纶纤维作为一种高强度纤维正好满足了输送带发展的需求。本课题主要利用芳纶纤维的优良的力学性能,针对芳纶Ⅲ长丝,进行芳纶增强体输送带的设计及研究。并确定芳纶长丝织造前的处理方法为上浆处理。依据行业标准MT914-2008煤矿用织物整芯阻燃输送带的规定,进行机织物的规格设计与织物工艺计算,设计出三类产品,即平纹组织织物、经重平组织织物、纱罗组织织物,共计8种不同组织的芳纶织物增强体产品。根据生产工艺流程,对芳纶织物增强体进行制备。在对芳纶织物增强体进行制备的过程中,发现芳纶长丝在织造的过程中易产生毛羽,造成纱线间相互纠缠。本课题设计了5种浆料配方,通过反复的实验测试,最终确定最优芳纶长丝的浆料配方,即LAMCOL ES8:水=3:1。并且通过毛羽、耐磨性能以及退浆率的测试,表明芳纶长丝经浆纱工艺后,反复摩擦,仍能保持较少的毛羽数量,降低了织造过程中芳纶长丝相互纠缠的可能性,进而顺利完成了8种芳纶织物增强体小样试制,并对8种芳纶织物增强体进行了织物厚度以及织物拉伸强度的测试。其中,纱罗组织织物的经向断裂强度最大,可以达到602.0N/5cm。根据行业标准MT914-2008煤矿用织物整芯阻燃输送带的规定,确定了输送带橡胶基体为氯丁橡胶,设计出了平纹组织、经重平组织、纱罗组织3种组织结构芳纶织物增强体复合材料,并制作了矿用芳纶增强体氯丁橡胶基输送带复合材料。对芳纶增强体氯丁橡胶基输送带复合材料进行各项性能测试,分别为氧指数、硬度、拉伸强度、黏合强度、撕裂力等。测试结果表明,3种芳纶织物增强体氯丁橡胶基输送带的氧指数均可达36%以上,达到标准;3种芳纶织物增强体氯丁橡胶基输送带的硬度均达标,织物增强体硬度均在邵氏A硬度80以上;3种芳纶织物增强体氯丁橡胶基输送带的力学性能均能符合行业标准,其中纱罗组织增强体橡胶基输送带力学性能最好,其拉伸强度经向为3191.14N/mm,纬向为454.95N/mm,黏合强度为9N/mm,撕裂力为1755.39N。根据实际应用,设计制作了3种输送带表面花纹分别为条形花纹、折形花纹、菱形花纹,对3种花纹输送带表面摩擦系数进行了测试,结果表明,三种花纹均能满足输送带的倾角为38°时的物料输送。其中菱形花纹静摩擦系数为0.85,能够满足输送带角度为40°时物料的正常运输。
[Abstract]:Belt conveyor is a main transportation equipment in coal mine production, and conveyer belt is an important part of belt conveyor. The conveyor belt plays the role of carrying and transporting material. The conveyor belt is a kind of compound products. The main components are core skeleton material and matrix material, and the core skeleton material is generally fiber, metal or fabric. Material and matrix materials are generally rubber or plastic. The selection of materials and structures affects the overall performance of the conveyer belt, including mechanical properties, service life, application places and so on. With the increase of the amount of coal carrying capacity in China, the increasing of carrying efficiency, the increase of the demand for the conveyor belt, and the corresponding improvement of the quality requirements. The most important characteristic of the power transmission and material transportation is the strength of the conveyer belt. Therefore, it is the main direction of the development of the conveyer belt to improve its strength. As a kind of high strength fiber, the aramid fiber meets the demand of the development of the conveyor belt. The design and research of the aramid reinforced body conveyer belt are designed and studied. The processing method for the aramid filament weaving is determined to be used for sizing treatment. According to the regulations of the industrial standard MT914-2008 coal mine fabric with whole core Flame-retardant conveyer belt, the specifications design of the woven fabric and the fabric process are calculated, and three kinds of products are designed, that is, the plain weave fabric and the leveling group. Woven fabric, leno fabric, a total of 8 different kinds of aramid fabric reinforced products. The aramid fabric reinforced body was prepared according to the production process. In the process of preparing the aramid fabric, it was found that the aramid filament easily produced hair feather during the weaving process, and caused the entanglement between the yarns. This subject has designed 5. Through repeated experimental tests, the optimum formula of the aramid filament was determined by repeated test. The LAMCOL ES8: water =3:1. and the test of Mao Yu, wear resistance and desizing rate showed that after the aramid filament was rubbed repeatedly after the sizing process, the number of Mao Yu remained less and the aramid filament was reduced to each other during the weaving process. 8 kinds of aramid fabric reinforced bulk samples were successfully completed, and the thickness of the 8 aramid fabric reinforced bodies and the tensile strength of the fabric were tested. Among them, the meridional fracture strength of the leno fabric was maximum, which could reach 602.0N/5cm. according to the line industry standard of MT914-2008 coal mine fabric. The rubber matrix of the conveyer belt is selected as the chloroprene rubber, and the 3 kinds of aramid fabric reinforced composites are made out of the plain weave tissue, the weave tissue and the leno structure, and the aramid reinforced neoprene rubber base conveyer composite material is made. The test results show that the oxygen index of the 3 aramid fabric reinforced chloroprene rubber base conveyer belt can reach more than 36%, reaching the standard, and the hardness of the 3 aramid fabric reinforced chloroprene rubber base conveyer belt is all up to the standard, and the hardness of the fabric reinforcement is 8 at shore A hardness of 8. More than 0, the mechanical properties of the 3 kinds of aramid reinforced neoprene base conveyer belt all meet the industry standard, and the mechanical properties of the leno reinforced rubber base conveyer belt are the best. The tensile strength is 3191.14N/mm, the zonal direction is 454.95N/mm, the bonding strength is 9N/mm, and the tear force is 1755.39N. according to the practical application, 3 kinds are designed and made. The surface pattern of the conveyer belt is a strip pattern, a folding pattern and a rhombus pattern. The friction coefficient of the 3 pattern conveyer belts is tested. The results show that the three patterns can satisfy the conveying of the material of the conveyor belt with a angle of 38 degrees. The static friction coefficient of the rhombus pattern is 0.85, which can satisfy the normal material of the conveyor belt with a angle of 40 degrees. Transportation.
【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD528.1

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