The Fundamental Research And The Experiment Analyze Of The Journal Beaing's Capacity

The capacity of bearing is the key point of journal bearing's design in production practice, which is extremely important to the bearing technology development. Usually, there are many factors influence the capacity of journal bearing, such as the wide of axle bush compared to diameter of axle, eccentricity, relative gap, and the lubricant film supporting capacity is also different in the different work load and in the rotational speed situation.This article adopts the numerical calculus method and the programming language, to research the capacity of journal bearing through the way of the theoretical calculation and the experiment value. This article simplifies the Reynolds equation into dimensionless form, and uses the finite difference method and the ultra flaccid repetitive process as well as mathematics software MATLAB to program and solve the dimensionless form of the Reynolds equation, and obtains the pressure distribution value and the three dimensional graph of journal bearing lubricant film, and also studies the bearing film pressure distribution influence rule of the wide of axle bush compared to diameter of axle and eccentricity. Under the different work load and the rotational speed, this article uses the journal bearing laboratory bench ZHS20 to obtain the journal bearing's lubricant film pressure distribution and the hydrodynamic lubrication characteristic correlation curve, and research the journal bearing rubbing factor, the friction condition transformation and the excessive rotational speed, compares the bearing supporting capacity of theoretical calculation and the experiment value, gives the coefficient of the leading-in terminal releases, studies the quantity of releases when the bearing is working. Through to develop the test function of the laboratory bench, this article obtains the bearing's lubricant film pressure distribution under different relative gap, and analyses the influence of the relative gap to the bearing supporting capacity, and obtains the relative gap best value which can cause the bearing to get the greatest supporting capacity. At last, this article carries on the visualization operation contact surface design to the bearing supporting capacity which contains the theoretical calculation value and the actual computation value, and the contact surface makes the computation and the demonstration of result much vividly, simply and directly.