Study On Running Noise Characteristics Of High Speed Spindle And Noise Reduction Of Surface Coating And Texture

The operating noise of high-end textile equipment and its special parts is affected by multiple variables and is extremely coupled,resulting in a large operating noise of textile equipment in the weaving process.The noise intensity far exceeds the safety threshold limit of the latest national standard.At present,noise pollution has become a major obstacle for the high-end textile equipment industry to achieve high-precision weaving and green weaving.Therefore,studying the running noise of high-end textile equipment and its special parts and exploring methods to suppress noise is currently the bottleneck faced by the efficient development of high-end textile equipment,and has important practical significance and scientific value.This article combines experimental and finite element simulation methods,taking the core component spindle of high-end textile equipment cotton spinning machine as an example,to study the operating noise characteristics of high-speed spindle under different working conditions,and explore the influence of surface texture and coating on spindle noise,proposing surface texture and coating types that can effectively suppress noise.The specific work is as follows:(1)Taking YD4203 high-speed spindle as a sample,by adjusting the running speed of the spindle and comparing the running noise of the spindle under different speed conditions,it is found that the running noise of the spindle basically increases with the increase of the speed,and the changes are different in different speed ranges.(2)By studying the noise characteristics of YD4203,YD6103 and YD6111 high-speed spindles at different speeds,the influence of different ingot and rod configurations on the running noise of spindles is obtained.It is found that compared with elastic damping elements under spring,the elastic damping elements under thrust bearing have better noise reduction effect at medium speed and high speed.And the spindle with a smaller spindle rod size produces a smaller sound pressure level during operation.(3)Taking type YD4203 spindle as prototype,the distribution and change of running noise of high-speed spindle under different speed and frequency were analyzed by combining experiment and simulation.It was found that the running noise of spindle increased with the increase of frequency,and the running noise near the yarn cutter was the largest.Comparison with the test results verified the correctness of the simulation analysis.(4)By preparing Al-Ti-Cr-C,Ti-C and DLC coatings on the spindle tip surface of high-speed spindle,and comparing the operating noise of the three coated spindles with those without surface coating treatment at different speeds,the influence of surface coating on the operating noise of the spindle is explored.It is found that,compared with the control group,the above three coatings can reduce the operating noise pressure value of the spindle,and the Ti-C coating has the most obvious noise reduction effect,and the average noise can be reduced by 1.91 d B at the working speed.(5)By preparing three micro-textures on the tip surface of high-speed spindle,namely diamond shape,regular hexagon and fish scale pattern,and comparing the running noise generated by the spindle without surface texture treatment with the three kinds of spindle at different speeds,the influence of surface texture on the running noise of spindle is explored.It is found that the noise pressure value of the three kinds of spindle is smaller than that of the control group,and the diamond spindle has the smallest sound pressure value,and the average noise can be reduced by 0.83 d B at the working speed.