The competition of reducer products in automation equipment is becoming increasingly fierce. With the continuous development of society, precision planetary reducers are more and more widely used, and noise is used as a performance indicator of the quality of servo planetary reducers. For the noise source of the servo planetary reducer, the reasons must be analyzed and studied from the design, maintenance and installation of the reducer.
(1) The influence of the parameters and structure design of the core part gear of the servo planetary reducer on noise; a pair of gears are in transmission. The higher their overlap, the lower the noise generated. Of course, the smaller the coincidence degree, the higher the noise. It means that the number of gear teeth participating in meshing at the same time increases, which is of great significance for improving the smoothness of gear transmission, reducing noise and improving load-carrying capacity.
(2) The gear accuracy grade is an important indicator of the noise level. For the standard series of servo planetary reducers, the gear manufacturing accuracy determines its noise value. The higher the gear precision, the denser the contact spots on the meshing tooth surface, the contact spots on the entire tooth surface, the lower the noise. On the contrary, the lower the gear accuracy, the smaller the contact scars on the meshing tooth surface, and the gear cannot be completely meshed in its contact width, the operation will be unstable, and even cause impact, which will increase the noise value.
(3) Impact and noise caused by pitting on the tooth surface; after the transmission gear is loaded and operated for a period of time, small pieces of metal often fall off near the pitch line of the tooth surface, forming pitting corrosion. Because the hard tooth surface gear has a large load-bearing capacity and volume The advantages of small size, light weight, and good transmission quality are widely used, although hard-faced gears are not prone to pitting. But once pitting occurs, it is not easy to run-in. The pitting corrosion of the tooth surface will continue to expand rapidly as the working time increases. Developed into extended pitting. The tooth shapes are broken each other, and the working noise and impact are increased. The metal chips dropped by the impact accelerate the wear of the tooth surface, which makes the gear transmission unstable and produces noise.
(4) Gear machining errors are easy to cause noise; the errors generated during gear machining lead to noise mainly due to accumulated errors in tooth pitch and tooth profile errors. The cumulative error of the tooth pitch is due to the non-coincidence of the rotation axis of the tooth blank with the rotation axis of the gear when the gear is working, resulting in uneven gear tooth thickness. Tooth profile error is mainly caused by errors in the manufacturing, sharpening and installation of the hob, which cause the tooth surface to be edged, the tooth profile is asymmetry, undercut and subsequent processing are not fully corrected, which makes the gear transmission unstable. The phenomenon of pulsation, undercutting and tooth punching occurs and then noise is generated.
(5) The elastic deformation of the tooth surface of the heavy-duty gear drive causes noise; The heavy-duty gear, especially the hard-tooth gear, has a large elastic deformation and extremely poor running-in performance. The impact of the gears caused by the load deformation produces noises. .
In short, the noise source of the servo planetary reducer is related to the design, manufacturing, assembly accuracy and maintenance of the whole machine, and strive to improve the smoothness of the transmission and reduce the noise.
(1) The influence of the parameters and structure design of the core part gear of the servo planetary reducer on noise; a pair of gears are in transmission. The higher their overlap, the lower the noise generated. Of course, the smaller the coincidence degree, the higher the noise. It means that the number of gear teeth participating in meshing at the same time increases, which is of great significance for improving the smoothness of gear transmission, reducing noise and improving load-carrying capacity.
(2) The gear accuracy grade is an important indicator of the noise level. For the standard series of servo planetary reducers, the gear manufacturing accuracy determines its noise value. The higher the gear precision, the denser the contact spots on the meshing tooth surface, the contact spots on the entire tooth surface, the lower the noise. On the contrary, the lower the gear accuracy, the smaller the contact scars on the meshing tooth surface, and the gear cannot be completely meshed in its contact width, the operation will be unstable, and even cause impact, which will increase the noise value.
(3) Impact and noise caused by pitting on the tooth surface; after the transmission gear is loaded and operated for a period of time, small pieces of metal often fall off near the pitch line of the tooth surface, forming pitting corrosion. Because the hard tooth surface gear has a large load-bearing capacity and volume The advantages of small size, light weight, and good transmission quality are widely used, although hard-faced gears are not prone to pitting. But once pitting occurs, it is not easy to run-in. The pitting corrosion of the tooth surface will continue to expand rapidly as the working time increases. Developed into extended pitting. The tooth shapes are broken each other, and the working noise and impact are increased. The metal chips dropped by the impact accelerate the wear of the tooth surface, which makes the gear transmission unstable and produces noise.
(4) Gear machining errors are easy to cause noise; the errors generated during gear machining lead to noise mainly due to accumulated errors in tooth pitch and tooth profile errors. The cumulative error of the tooth pitch is due to the non-coincidence of the rotation axis of the tooth blank with the rotation axis of the gear when the gear is working, resulting in uneven gear tooth thickness. Tooth profile error is mainly caused by errors in the manufacturing, sharpening and installation of the hob, which cause the tooth surface to be edged, the tooth profile is asymmetry, undercut and subsequent processing are not fully corrected, which makes the gear transmission unstable. The phenomenon of pulsation, undercutting and tooth punching occurs and then noise is generated.
(5) The elastic deformation of the tooth surface of the heavy-duty gear drive causes noise; The heavy-duty gear, especially the hard-tooth gear, has a large elastic deformation and extremely poor running-in performance. The impact of the gears caused by the load deformation produces noises. .
In short, the noise source of the servo planetary reducer is related to the design, manufacturing, assembly accuracy and maintenance of the whole machine, and strive to improve the smoothness of the transmission and reduce the noise.
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