Song Ding

Design and Experimental Research on Double-Pitch Time-Sharing Meshing Silent Chain

In order to apply silent chain on conveyor, double-pitch time-sharing meshing silent chain is proposed, and by comparing with traditional silent chain with same pitch, the self-weight 20%~30% of this chain is reduced. According to meshing theory, parameters are designed for double-pitch time-sharing meshing silent chain to make each tooth profile of chain plate involving in meshing and time-sharing load bearing and to change the meshing state of traditional silent chain in the meshing process. Noise comparison test is conducted to verify its excellent performance, when rotate speed is 350r/min, the noise of double-pitch time-sharing mesh silent chain is 4.6dB lower than traditional double-pitch roller chain. Meanwhile, 250h abrasion test is conducted, the abrasion elongation of chain is 0.23% after test, which is significantly lower than traditional double-pitch roller transport chain. The rationality of new chain design is proved by test result, which provides theoretical basis for applying silent chain on conveyor.

A Novel Roller Chain Sleeve Crevice Identification and Orientation Device Design and Test

In order to solve the problem of chain wearing elongation due to random assembly of roller chain sleeve crevice orientation, a novel roller chain sleeve crevice identification and orientation device is proposed. By means of force analysis of the identified sleeve, establish the shape and material parameter relation of drive driven sprocket and collet, to fulfill high-efficiency and high-accuracy roller chain assembly. The tested chain sleeve is 10B-1, two hundred sleeve crevice identification and orientation were tested 50 times. Every test average time is 182.3s and all the sleeve crevice out of the discharge opening is collinear. The rationality and practical applicability of roller chain sleeve crevice identification and orientation device design procedure is verified.

Test and Analysis of Bush Roller Chains for Noise Reduction

A low noise duplex bush chains with split rollers was developed through changing roller structure to reduce noise of bush roller chains. The split rollers could absorb more impact energy, mitigate meshing impact and reduce chain drive noise. The noise generated by different types of duplex bush roller chains was carried out to test in same speed, low noise characteristics of duplex sleeve chains with split rollers was verified. By analysis of testing data, noise level of duplex sleeve chains with split rollers compared with that of the other duplex bush roller chains was reduced by the average 3 ~ 8dB, and low 10 ~ 13dB than that of 16A simplex sleeve roller chains. The chains made chain drive significantly improve in the working environment, with steady transmission, strong bearing, low noise, and a significant noise reduction was achieved.

Design and Test of Silent Chain Including Silicon Fluorine Rubber Link Plate

In order to reduce the meshing noise of silent chain drive, a new concept of the chain (silent chain including silicon fluorine rubber link plate) was proposed. It could change the meshing contact state by changing the shape of traditional steel chain plate and arranging the silicon fluorine rubber link plate reasonably, which reduced meshing impact, so the meshing noise was reduced. Through the platform contrast test, a noise test was made with different types of silent chain at the same speed, and the results shown that the silent chain including silicon fluorine rubber plate drove more smoothly than other silent chains, the level of noise was reduced 2dB～3dB, which verified the fact that the silent chain including silicon fluorine rubber link plate could reduce noise.

Research on Noise Test of Chains with Non-Metallic Elastic Material Split Rollers

In order to reduce chain drive noise, by changing chain roller structure to mitigate meshing impact and achieve the purposes of noise reduction, a kind of duplex chains with non-metallic elastic material split rollers was designed. To study noise performance of the chains, noise comparison test was done on the same specifications duplex roller chains, and the test results were analyzed and evaluated. The results showed that duplex chains with non-metallic elastic material split rollers could reduce the meshing impact and the polygon effect, which could effectively reduce vibration and noise in the process of chain drive. So the design was reasonable and feasible, noise level was reduced by 3-8dB and a significant noise reduction was achieved.