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针对喷播机原有液压系统管路结构复杂,容易泄漏,振动和噪声大的问题,将液压转向集成块应用在喷播机转向机构中,并且利用FLUENT软件对其特征孔道的流场进行数值仿真研究。结果表明:1)集成块可以有效减少原有液压系统管路结构,使液压系统结构紧凑,实现元件之间无管道连接,同时减少了系统泄漏、振动和噪声;2)通过分析孔道结构对其内部流场的影响,验证了集成块孔道内部压力损失与孔道结构以及流体的速度有关,在工作条件允许的情况下,应降低流体的速度,以减少压力损失;3)通过优化孔道结构可以降低压力损失,如T型孔道中增加工艺孔,可使压力损失降低8%左右,当进油口孔道和出油口孔道直径不一致时,建议出油口直径取0.8~1.2倍进油口直径。
In view of the complex structure of the existing hydraulic system of the spray drier and the problems of easy leakage, vibration and noise, the hydraulic steering integrated block is applied to the steering mechanism of the spreader, and the flow field of the characteristic borehole is numerically calculated by using FLUENT software simulation Research. The results show that: 1) The manifold block can effectively reduce the pipeline structure of the original hydraulic system, make the hydraulic system compact and realize no pipe connection between the components, meanwhile reduce system leakage, vibration and noise; 2) The internal flow field and the pressure drop in the tunnel are verified to be related to the pore structure and fluid velocity. When the working conditions permit, the velocity of the fluid should be decreased to reduce the pressure loss. 3) The pore structure can be reduced by optimizing Pressure loss, such as the T-shaped hole to increase the process hole, the pressure loss can be reduced by about 8%, when the inlet hole and outlet hole diameter inconsistencies, it is recommended to take the oil outlet diameter 0.8 to 1.2 times the diameter of the inlet.