Polushyna M.V., Moskalova N.V, Gankevich V.F. Static force analysis of a single toggle jaw crusher

Details

Parent Category: Geo-Technical Mechanics, 2020

Category: Geo-Technical Mechanics, 2020, Issue 152

Geoteh. meh. 2020, 152, 254-262

https://doi.org/10.15407/geotm2020.152.254

STATIC FORCE ANALYSIS OF A SINGLE TOGGLE JAW CRUSHER

¹Polushyna M.V.,¹Moskalova T.V, ¹Hankevich V.F.

¹National Technical University Dnipro Polytechnic

UDC 621.926.22

Language: Ukrainian

Annotation. There are various recommendations in domestic and foreign literature regarding the law of distribution of the crushing load along the swing plate of jaw crushers: even, linear or nonlinear. The method of load distribution along the swing jaw affects the resultant crushing force, its application point and, therefore, the forces subjected to the jaw crusher links. A feature of a single toggle jaw crusher is the strong force exerted on the eccentric shaft since the crushing forces are directly transferred to the shaft. Therefore, it is important to determine the worst design case in order to calculate the strength of crusher parts. This article represents the static study of the influence of the application point of the crushing force on the forces acting on the eccentric shaft and the toggle plate of the single toggle jaw crusher. During the study, a kinematic scheme of the mechanism of the single toggle jaw crusher in the form of a four-link crank mechanism was worked out. The dependences of the angles of the rotation of the link on the angle of the eccentric shaft rotation of the crusher were obtained, which allowed determining the trajectories of different points of the swing jaw and the sections of the moving plate which crushed feeding material during the cycle. Static force analysis of the mechanism of a single toggle jaw crusher was carried out which made it possible to understand the mechanism of torque transmission to the links of crusher, determine the forces acting on the toggle plate and the eccentrics shaft bearings, as well as the shifting of application point position of the resultant crushing force along the swing plate during one stroke. The graphs of dependencies of the forces acting on the eccentric shaft and the toggle plate on the position of application point of the crushing load were built, which made it possible to determine the worst case for calculating the strength of crushers’ joints. It is established that maximum forces subjected to the eccentric shaft and the toggle plate occur when the crushing force is applied to the bottom zone of the moving plate. Such an application corresponds to the nonlinear distribution of the crushing load along the swing jaw.

Keywords:

single toggle jaw crusher, kinematic scheme, eccentric shaft, toggle plate.

References

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About the authors

Polushyna Maryna Vitaliivna, Candidate of Technical Science (Ph.D.), Associate Professor in the Department of Mining Machines and Engineering of National Technical University Dnipro Polytechnic, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Moskalova Тetyana Vitaliivna, Candidate of Technical Science (Ph.D.), Associate Professor in the Department of Mining Machines and Engineering of National Technical University Dnipro Polytechnic, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Hankevich Valentyn Feodosiivych, Candidate of Technical Science (Ph.D.), Associate Professor in the Department of Mining Machines and Engineering of National Technical University Dnipro Polytechnic, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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