| At present,the application of motor windlass in power construction project is up to 80%-90%.It will play an increasingly important role in the background of the development of the electric power industry.According to the new standards proposed by the power industry,the mainstream single roller windlass in the market at present can not meet the new requirements.In practical engineering,the gearbox gear and the shaft of double roller windlass(ZJ-(Q/C)XS-50/30-B)appear failure fracture,which seriously affects the double roller windlass' s safety,and also restricts the development of power construction.Therefore,it is very important to carry out the analysis and design of the transmission structure.Under rated load condition,From the point of view of theoretical design,the strength and safety analysis of the key parts of double roller grinder is carried out.It is concluded that the safety of the key components of the double roller windlass is satisfied in the ideal model,meanwhile,it can be excluded that the key parts cause transmission failure.The mechanics distribution trend of winding steel wire rope of double roller windlass with equal diameter is analyzed,which is based on the belt transmission mechanics model.According to the theoretical analysis,the wire rope tension in this model is distributed in the form of negative exponential,and the friction force on the rope grooves decreases with the increase of the number of rope.The first rope groove friction reached 15794 N,and the last was only 430 N.The wire rope belongs to the elastomer in the elastic limit.Due to the different diameters of the rollers,additional strain appears in the wire rope during the winching process..When the distribution trend of wire rope tension with unequal diameter was analyzed,the stress strain relation within elastic limit of elastome is considered on the basis of the belt transmission mechanics model.So the mechanics distribution model was formed.From the theoretical analysis,it can be concluded that the steel wire rope of double rollers winch windlasses with unequal diameter has greater additional tension,and its equivalent additional tension reaches about 17% of the ideal model load.For the mechanical model above,the ABAQUS was used for the analysis of simulative analysis of these two models of rollers-steel wire rope.The theoretical research was proved to be reasonable by the comparison between simulation and theoretical analysis results.Because of the theoretical analysis,the structure design was carried out,and the concept of disk friction clutch is proposed.On the basis that structure of the windlass is not changed,a disc friction clutch is designed for the passive roller.Through the overload protection of the clutch,the tension of the wire rope is balanced.For the mechanical distribution of wire rope of double rollers windlass and the improved roller structure,the online measurement of the wire rope tension of double roller windlass was proposed.A test experiment system based on LabVIEW and an experimental platform for the tension of online measurement was designed.Considering the structural features of the windlass,the "indirect measurement method" is introduced to realize the tension detection under the load of the wire rope.The data collection and experimental study on the tension of steel wire rope under different structural parameters was carried out,which shows that the experimental tension value is basically consistent with the theoretical analysis results. |
PDF Full Text Request