| Water lubricated rubber bearing is now universally recognized and widely used inship shaft propulsion system, submersible pump, washing machine and other equipmentbecause of its good lubrication performance. The bearing has been studied in variousaspect including rubber materials, internal structure and friction properties.Spiral groove water lubricated rubber alloy bearing is invented by Pro. Wang Jiaxu,Chongqing university. Based on years of study and research, the new structure of thewater lubricated bearing improved a lot in the performance and the production processis different from ordinary one.The thesis study the dynamic pressure properties of spiral groove of waterlubricated rubber alloy bearing based on dynamic pressure lubrication mechanism. Firstof all, according to installation clearance and inner-surface structure of spiral groove,specific shape of flow field with stability condition is confirmed. With the aid ofprofessional fluid calculation software ANSYS CFX, the processed flow fields areanalyzed in details: with different speed, different eccentricity, different excessivechamfering, different spiral angle, different water supply and different number ofgrooves of fluid dynamic pressure domain pressure distribution, bearing capacity, theinfluence of flow speed. And then, the vortex in the flow field is analyzed, with thetheory of vortex being used in the model.Furthermore, under the condition of reality operation, the flow field is inevitablycontaminated by different sediment particles. Taking actual situation into consideration,the flow field is treated as fluid-solid two phase flow field based on previous research.According to particle erosion wear theory, erosion wear caused by sediment particles issimulated and predicatively analyzed. Combining with the vortex theory, effect ofdecontaminating particles as for the vortex flow field is demonstratedThen, Fluid-structure interacting model is introduced into the calculation process tosimulate the deformation of rubber because of the fluid dynamic pressure of the flowfield.In addition, explicit dynamic contact process is simulated. Taking actual operationcondition into consideration, the overhanging axes supported by the bearing willinevitably be subjected to outside complex mechanical condition. There is likely to beshort concentrated force impact. Rubber-alloy is used to buffer the impacts. So, with ABAQUS, impact contact process is analyzed and the result with different structuresand force conditions are discussed. The results show that the more grooves there are inthe structure the better the buffering effect is.At last, the experiment is conducted to the specific rubber-alloy bearing. Frictioncoefficient under different operation condition is comparatively obtained.Paper content by the national natural science funds face project "big size highpressure water lubrication bearing system of innovation design theory and method"(theproject Numbers:50775230) support, proposed by the research of screw groove ofwater lubrication rubber bearing alloy of dynamic pressure characteristics, drainagecapacity and dynamic contact and protection to provide relevant research methods andnew model. |
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