基于仿生学与TRIZ相结合的流体传输节能装置的研究与应用

发布时间：2019-05-09 14:33

【摘要】：流体在管路中流动时大多处于湍流状态,在传输过程中存在着能量浪费的现象,再加上现阶段国内水泵存在着运行效率不高等问题,为了更好地提高能源资源利用效率,需要研究开发流体在传输过程中的节能装置,加强节能能力建设。然而在新产品开发过程中,开发成功率较低。据对国外700个工业企业的调查,新产品开发综合成功率仅为65%。因此,研究产品开发方法,对于成功开发新产品将具有重要的现实意义。本文较系统地分析了TRIZ理论和仿生学特点以及它们解决问题的一般步骤,找出了它们的相同点和不同点,分析了它们的可结合性,提出了这两种方法结合的路径,并最终实现了仿生学与TRIZ理论发明原理的结合。两者的结合对TRIZ理论和仿生学方法的发展和应用有着及其重要的作用,仿生学的一些原理充实、深化了TRIZ理论的发明原理,TRIZ理论中的冲突解决原理为仿生学提供更完整的理论基础。两者的结合可以为产品设计提供明确的思路,提高产品开发的成功率。在此方法的指导下,结合工程实际设计出了一套流体传输节能装置:水泵能效优化装置和新型旋启式节能止回阀。利用FLUENT软件对该装置进行CFD模拟实验,找出了其内部流场参数速度、压力、流量等的变化规律。实验证明:在水泵出水口加上该能效优化装置后,水流速度变得均匀且方向一致,减少了由于不规则湍流运动带来的水质点之间碰撞及能量损失,虽然出口处流量有所减少,但提高了水泵的扬程,通过与普通管道的功率进行比较,验证了其节能性能。通过现场试验,效果良好,由此证明,该能效优化装置在水流存在明显不规则湍流的情况下,能够起到一定的节能作用。止回阀作为流体传输管网上必不可少的部件,其性能影响着传输过程中能量的损失。针对传统止回阀存在挡水面积较大,流阻系数大的缺点,设计出一种新型旋启式多瓣止回阀,当阀瓣打开时,阀瓣位于流道侧面,有效减小了挡水面积,采用四个阀瓣,可以有效降低阀瓣关闭时的行程。通过FLUENT仿真实验,证明该止回阀当阀门打开时,阀门的流阻系数相对于绝大多数止回阀来说是相当低的,说明该止回阀的流通能力很强,因而能起到一定的节能作用。
[Abstract]:Most of the fluid flows in the pipeline in turbulent state, there is a waste of energy in the process of transmission, coupled with the current domestic pump operation efficiency is not high and so on, in order to improve the efficiency of energy resources utilization, It is necessary to study and develop energy-saving devices in the process of fluid transmission and strengthen the construction of energy-saving capacity. However, in the process of new product development, the success rate of development is low. According to the survey of 700 foreign industrial enterprises, the comprehensive success rate of new product development is only 65%. Therefore, the study of product development methods will be of great practical significance for the successful development of new products. This paper systematically analyzes the characteristics of TRIZ theory and bionics as well as their general steps to solve problems, finds out their similarities and differences, analyzes their combinability, and puts forward the path of combining the two methods. Finally, the combination of bionics and TRIZ theory is realized. The combination of the two plays an important role in the development and application of TRIZ theory and bionics method. Some principles of bionics are enriched and the invention principle of TRIZ theory is deepened. The conflict resolution principle in TRIZ theory provides a more complete theoretical basis for bionics. The combination of the two can provide a clear way of thinking for product design and improve the success rate of product development. Under the guidance of this method, a set of fluid transmission energy saving device is designed according to the engineering practice: water pump energy efficiency optimization device and a new type of rotary energy saving check valve. The CFD simulation experiment of the device is carried out by using FLUENT software, and the variation laws of velocity, pressure and flow rate of the internal flow field parameters are found out. The experimental results show that when the pump outlet is added with the energy efficiency optimization device, the flow velocity becomes uniform and the direction is consistent, which reduces the collision and energy loss between water quality points due to irregular turbulent motion, although the flow rate at the outlet is reduced. However, the lift of the pump is improved, and its energy saving performance is verified by comparing with the power of the ordinary pipeline. The results of field tests show that the energy efficiency optimization device can save energy when there is obvious irregular turbulence in the water flow. The results show that the energy efficiency optimization device has a good effect on energy saving under the condition of irregular turbulence in the water flow. As an indispensable part of fluid transmission network, the performance of check valve affects the loss of energy in the process of transmission. In view of the disadvantages of the traditional check valve, such as large water retaining area and large flow resistance coefficient, a new type of rotary multi-valve check valve is designed. When the valve disc is open, the valve disc is located on the side of the runner, which effectively reduces the water retaining area, and four valves are adopted. It can effectively reduce the stroke when the disc is closed. Through the FLUENT simulation experiment, it is proved that the flow resistance coefficient of the check valve is relatively low compared with most check valves when the valve is opened, which indicates that the flow capacity of the check valve is very strong, so it can play a certain energy-saving role.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH122

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