Structure Design And Performance Analysis Of The Oil-air Mixer

As a new lubrication mode, the oil-air lubrication is developing rapidly on the basis of inheriting advantages and abandoning disadvantages of the oil mist lubrication in recent years. This technology is applied widely to various industrial fields, and benefits a lot in economical and environmental aspect. The oil-gas mixer that its performance will affect directly on the lubricating effect is one of the key components of the lubrication system.The structure of oil-gas mixer is designed and its performance is simulated in this thesis. The main works and conclusions are shown as follows,The working principle of oil-air mixer is studied based on the theory of gas-liquid two phases flow. According to the need of oil-air lubrication, three performance parameters of the oil-gas mixer in oil-gas lubrication system, such as the ratio of the oil film thickness, the oil content ratio and the oil flow distribution, are defined. Combined with two universal evaluation parameters, such as the velocity and pressure of the mixer outlet, the performance evaluation index system for the oil-air mixer is established.Inner flow area of the exiting mixer is simulated and analyzed by FLUENT. And the performances of the mixer are fully evaluated by the performance evaluation index system. A new mixer is designed on the basis of new theory. It is found that the performance of new mixer is betterImpacts of two key structure parameters, the taper of cone, the number of oil entrance, the mode of air entrance, on performance of the oil-air mixer are studied in detail. Results show that the performance of mixer could be improved by choosing these two parameters reasonably.The influence of three different bended-pipes on the performance of mixer system is analyzed. Results show that the bended-pipe will affect the stability of oil-air mixer. The more reasonably choose the distribution of bends, the better of the performance of mixer.All of the above conclusions can be taken as references for the structure design and the performance evaluation of the oil-air mixer.