The Modeling And Finite Element Analysis Of Key Components On Vibro Ripper

Vibro Ripper is a new type of broken hammer. It’s different from the existing hydraulic hammer. The lower noise and higher efficiency of performance of it have been recognized by most enterprises. Vibro Ripper is now still in development and trial stage. At present, only China, South Korea, Spain and some European countries are developing the product, and some progress and scientific results have been made. At present, our country has been at the forefront of the world, and there are more and more domestic enterprises participating in the project. The Shining’s product SV-60 ripper has already been exported to foreign countries as the mainstream product in China.SV-60 type Vrbro Ripper as the research object of this paper was developed and designed by virtual prototyping technology, including the parametric design and simulation analysis of the key parts. According to the characteristic structure and the working condition of Vibro Ripper, the finite element model of it was established, and then the static characteristic and dynamic characteristic analysis of vibro ripper key components were made. According to the analysis result, the structure improvement of Vibro Ripper was studied, and the feasibility of the improved design was determined. The main contents of this paper were summarized as follows:(1)The parametric model of gear was designed and the gear library was established with CATIA. A user interface of paramateric gear was made in VB, which made a connection with CATIA to drive the part module to generate the gear 3D model. Considering the effect of gear driving force and centrifugal force, the finite element model of gear was made in CAE part, and the contact strength of gear tooth surface was considered in the process of finite element analysis. The traditional calculation of gear was compared with the finite element analysis to demonstrate the rationality of gear model. On account of the centrifugal force, the displacement of gear surface was added in the finite element analysis process, which showed the influence of strain from gear speed.(2) The statics analysis, modal analysis, harmonic response analysis and transient response analysis were included in the finite element analysis, which were carried out basing on exciter’s model. The stress analysis and strain analysis were introduced in statics analysis. The best frequency of Vibro Ripper was judged according to the harmonic response analysis result, and the vibration state of key components on Ripper was judged from the instantaneous response analysis result. The influence on the vibration characteristics of the Vibro Ripper suffering from excavator load was considered in FEA process, and the optimum load value was determined.(3)The above analysis and calculation of Vibro Ripper were judged and evaluated in the process of improving Ripper’s performance. The weak part of Vibro Ripper was found and the improvement scheme was indeed.The methods of static analysis and harmonious response analysis were applied in the improved Riper, which revealed an optimized result compared with the old Ripper.