【摘要】：針對液壓泵在吸油過程中容易出現(xiàn)吸油不足的問題,設計了一種環(huán)形多噴嘴射流輔助吸油裝置。在考慮裝置尺寸要求和工況條件下,吸油裝置的面積比應適當取大。建立輔助吸油裝置的計算流體動力學三維模型,利用Fluent軟件研究了噴嘴個數(shù)、噴嘴入射角、喉嘴距、吸入室角度、喉管長度等參數(shù)對環(huán)形多噴嘴輔助吸油裝置性能的影響。結果表明:在保證噴嘴出口總截面積相同的條件下,噴嘴個數(shù)n越少越好,即n=2時效率最高;在一定范圍內,喉嘴距和噴嘴入射角對效率的影響不大,入射角一般取值在20°~35°之間,喉嘴距取值接近喉管入口直徑較好;吸入室角度對裝置的影響很小,在計算的14°~52°時效率變化不大;環(huán)形射流裝置的最優(yōu)喉管長徑比為2~2.5。
[Abstract]:In order to solve the problem of insufficient oil absorption in hydraulic pump, a circular multi-nozzle jet auxiliary oil absorbing device is designed. Considering the size and working conditions of the device, the area ratio of the oil suction unit should be appropriately larger. The three-dimensional computational fluid dynamics model of auxiliary oil suction device is established. The effects of nozzle number, nozzle incident angle, throat distance, suction chamber angle and throat length on the performance of annular multi-nozzle auxiliary oil suction device are studied by using Fluent software. The results show that under the condition that the total cross-sectional area of nozzle outlet is the same, the less the number of nozzles is, the better the nozzle number is, that is to say, the efficiency is the highest when the nozzles are In a certain range, the nozzle distance and nozzle incidence angle have little effect on the efficiency. The incidence angle is generally between 20 擄~ 35 擄, and the nozzle distance is close to the throat inlet diameter. The influence of the angle of the suction chamber on the device is very small, and the efficiency changes little in the calculated range of 14 擄~ 52 擄, and the optimal throat length to diameter ratio of the annular jet device is 2 ~ 2.5.
【作者單位】： 西南交通大學機械工程學院;
【分類號】：TH137.51

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