| 摘要: |
| 水力式升船机提升高度增加,输水流量和流速进一步提高,竖井水位同步问题更加凸显,影响升船机安全运行,有必要开展进一步研究,本文基于南科院提出的“长廊道输水系统+整体联通竖井”水力驱动系统,建立提升高度为150m级、过船吨位为500t级的水力式升船机1:30的概化物理模型,摸清非恒定流作用下,新型水力驱动系统在平衡重参与运行前、后,竖井水位变化的基本规律；分析竖井初始水深、输水流量两项关键因素对竖井水位同步性的影响,从而验证了新型水力驱动系统方案的可行性。试验结果表明,在充水初期,水面在整体连通的竖井内形成纵向坡降,经历往复振荡后衰减；平衡重参与运行后,发挥了整流作用,有利于减小竖井水面坡降、大幅缩短了振荡衰减时间,整个输水过程中竖井水位同步性高、各平衡重受力均匀；在初始水深大于15m的条件下,新型水力驱动系统能够保障百米级提升高度的水力式升船机竖井水位同步性要求。 |
| 关键词: 水力式升船机,联通竖井,水位同步性,水力坡降 |
| DOI： |
| 分类号:U642???????? |
| 基金项目: |
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| Water level Synchronization study of the fully connected shafts for Hydro-floating ship lift |
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XueShu1, WU Hongfu1, Li Zhonghua1, Li Jun2, Li Guangde2
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1.Nanjing Hydraulic Research Institute;2.China Energy Engineering Group Guangxi Electric Power Design Institute
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| Abstract: |
| With the lifting height of the Hydro-floating ship lift increases, the water conveyance and flow velocity further increase, the water level synchronization problem of the shaft is more prominent, which affects the safe operation of the ship lift, and it is necessary to carry out further research. This paper is based on the "long corridor water conveyance system + the overall linkage of the shaft" hydraulic drive system proposed by the Nanjing Hydraulic Research Institute, and establishes a 1:30 generalized physical model of the Hydro-floating ship lift with a lifting height of 150m and an overboard tonnage of 500t,to find out the basic law of the water level change of the shaft before and after the operation of the balanced-weights participation of the new hydraulic drive system under the action of non-constant flow; and analyzes the influence of the two key factors of the initial depth of the shaft and the water flow rate on the synchronization of the water level of the shaft, so as to validate the feasibility of the new hydraulic drive system scheme. The test results show that, in the early stage of water filling, the water surface forms a longitudinal slope drop in the whole connected shaft, and undergoes reciprocal oscillation and then decays; after the balanced-weights are involved in the operation, they play the role of rectification, which is conducive to reducing the slope drop of the water surface of the vertical shaft and greatly shortening the oscillation decay time, and the synchronization of the water level of the vertical shaft is high during the whole water transmission process, and the force of the balanced-weights is uniform; in the condition of the initial depth of water being more than 15m, the new hydraulic drive system is able to guarantee the lifting height of 100m. Under the condition that the initial water depth is more than 15m, the new hydrodynamic drive system is able to guarantee the water level synchronization requirement of the Hydro-floating ship lift shaft with 100m lifting height. |
| Key words: Hydro-floating ship lift, connected shaft, water level synchronization, hydraulic slope drop |
