Gear transmission is one of the important links in mechanical transmission system, and its meshing stability and lubrication reliability are the keys to ensure the smooth operation of transmission box. The gear meshing conditions under different lubrication parameters including incident distance, incident angle, incident diameter and others were tested to obtain the impact effect of oil on the gear. The data regression method was used to analyze the test data. The variation rule of gear transmission torque with different lubrication parameters was obtained, and the incident diameter was concluded as the critical influencing factor. The study could provide technical support for gear lubrication design considering oil impact.
In order to investigate the effect of abrasive flow on the polishing effect of mutant tube parts, this paper chooses the fifth-order mutant tube parts as the research object, and the abrasive flow analyzes and analyzes the polishing process of the fifth-order mutant tube parts, and discusses the micro- Processing mechanism. Based on the analysis of the dynamic pressure, velocity and turbulence kinetic energy distribution of the fifth-order sudden change of the flow conditions, the numerical simulation results of the fifth-order abrupt change of the abrasive flow were analyzed, and the different pressure conditions of the abrasive inlet Effect of abrasive flow polishing.
As the advanced technology to solve the ultra-precision machining of small hole structure parts and complex cavity parts, the abrasive grain flow processing technology has the characteristics of high efficiency, high quality and low cost. So this technology in many areas of precision machining has an important role. Based on the theory of solid-liquid two-phase flow coupling, a solid-liquid two-phase MIXTURE model is used to simulate the abrasive flow polishing process on the inner surface of U-tube, and the temperature, turbulent viscosity and turbulent dissipation rate in the process of abrasive flow machining of U-tube were compared and analyzed under different inlet pressure. In this paper, the influence of different inlet pressure on the surface quality of the workpiece during abrasive flow machining is studied and discussed, which provides a theoretical basis for the research of abrasive flow machining process.
In order to explore the numerical simulation of solid-liquid two-phase abrasive grain polishing and abrupt change tube, in this paper, the fourth order abrupt change tube was selected as the research object, using the fluid mechanics software to simulate,based on the theory of solid-liquid two-phase flow dynamics, study on the mechanism of AFM micromachining a workpiece during polishing.Analysis at different inlet pressures, the dynamic pressure distribution pipe mutant fourth order abrasive flow field, turbulence intensity, discuss the influence of the inlet pressure of different abrasive flow polishing effect.
Solid-liquid two-phase abrasive flow machining is a method to effectively polish the surface of Special-shaped surface parts. Based on the processing characteristics of the abrasive flow machining. The standard model and the pressure-coupled SIMPLEC algorithm are used. The shear force and velocity of the near-wall surface of the runner of the solid-liquid two-phase abrasive machining with different inlet pressure are analyzed. The numerical simulation results show that the inlet pressure has little effect on the velocity, and the shear force has a linear relationship with the inlet pressure. To obtain a better polishing effect, the outlet pressure can be appropriately increased.
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