Dynamic Behaviour of a Vibrating Jaw Crusher for Disintegration of Hard Materials

Wolny, Stanisław

doi:10.2478/amm-2013-0092

Cited by 4 publications

(6 citation statements)

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“…The experience of using vibratory jaw crushers to obtain fine-grained materials shows the possibility of implementing the results obtained in similar designs [15,16].…”

Section: Resultsmentioning

confidence: 99%

Prospects for the use of a vibratory jaw crusher with an inclined crushing chamber for processing of brittle materials

Franchuk,

Fedoskina,

Yu Svietkina

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Obtaining a powder product from brittle materials is associated with significant difficulties: an insufficient number of production capacities as well as with their low efficiency. This indicates relevance and need for research aimed at creating new designs and technological schemes. Glass containers were selected for research from among all types of glass waste. Presented are a structural diagram and description of a horizontal pendulum impact tester, on which studies were carried out on destruction of a bottle by impact load. The impact tester gives an opportunity to determine impact energy, impact speed, acceleration, movement of the impactor. An analysis of the above figures shows that one blow is enough to destroy a bottle. Rational mode is when impact load is distributed along the length of the bottle. This mode can be implemented in a vibratory jaw crusher with an inclined crushing chamber, which includes the following main elements: a passive jaw located on shock absorbers, an active jaw pivotally mounted in the body and connected to it by means of elastic links, a two-shaft inertial vibration exciter. The presented granulometric characteristic of the crushed bottle shows a high efficiency of using a vibratory jaw crusher. The yield of the product sized less than 5.5 mm was 95%, and that sized less than 100 microns - 16%. The crusher has enough parameters to adjust particle size distribution over a wide range.

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“…The experience of using vibratory jaw crushers to obtain fine-grained materials shows the possibility of implementing the results obtained in similar designs [15,16].…”

Section: Resultsmentioning

confidence: 99%

Prospects for the use of a vibratory jaw crusher with an inclined crushing chamber for processing of brittle materials

Franchuk,

Fedoskina,

Yu Svietkina

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…By varying these param eters, it is possible to select the optimal values of the elasticity coefficients for the specified operation mode of the crusher system. Using equations (2)(3)(4), the characteristics of the vibration amplitude as a function of the coefficient n were determined.…”

Section: Low Power Consumptionmentioning

confidence: 99%

“…When selecting the relation between the weights m 2 and m 3 , the parameter m1 value is set as a constant value depend ing on the design of the crusher system. The с 1 and с 2 param eter values are determined with consideration for equations (2)(3)(4). To determine the optimal relation between the weights of the vibrating elements, the following equations are used…”

Section: Low Power Consumptionmentioning

confidence: 99%

“…Paper [4] contains the results of studies based on the known wave equation that describes the motion of material in the crushing chamber without considering energy dissipation. To determine stresses in the crushing chamber, standard methods are used.…”

mentioning

confidence: 99%

“…The author of paper [4] presents the experimental data ob tained for the crusher operation in a narrow vibration frequen cy range of 27-35 Hz, because the maximum crusher produc tivity is ensured in this frequency range. In the paper, there is no data obtained for other frequency ranges and no data on power consumption.…”

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confidence: 99%

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Definition of rational operating modes of a vibratory jaw crusher

Mishchuk¹,

Nazarenko²,

Mishchuk³

2021

Nauk. visn. nat. hirn. univ.

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Due to the continuous development of the building-and-construction industry, it is necessary to design new or modify outmoded industrial equipment. Using jaw crushers with the impact action of crushing plates on material is a perspective line of developing crushing equipment. Purpose. Developing a mathematical model of a vibratory jaw crusher and studying the operational process which is based on the mathematical model in order to design new crushers. Methodology. Definition of the crusher working process is based on the main statements of the theory of mechanical oscillations and the theory of continuous environment. In the motion equations of the crusher the material is taken into account on the basis of a discrete model by a continual parameter. Findings. A physical model is developed on the basis of which motion equations are derived, which include three main conditions of the efficient operation: 1) the elasticity of the second vibrating element must exceed or be equal to crushing force; 2) vibrations of the first and the third vibrating elements must be in phase, and vibrations of the second vibrating element must be in antiphase; 3) the summarized displacement of the second and the third crushing plates must ensure crushing of material. Graphs of the effect of the vibrating elements and elasticity coefficients of elastic systems on the amplitudes of vibrations are plotted and analyzed. On the basis of the motion equations, with consideration for the optimal parameters of the crusher vibrating elements and for the elasticity coefficients of the elastic systems, the amplitude-frequency characteristics of the crusher for different frequency ranges are determined. Set up is an equation describing the displacement of material in the crushing chamber for a time interval required for the crushing plates to be separated. Presented are graphs of dependency of the amplitude of vertical vibrations of the crusher casing on the elasticity of the isolating elastic system, and provided are recommendations for selecting and calculating vibration isolation. Originality. A mathematical model of an experimental vibratory jaw crusher and the characteristics of the experimental crusher are presented, on the basis of which recommendations are given for the selection of energy-efficient operating modes of the crusher. Practical value. Knowledge on the rational values of the frequency ranges for operation of the studied vibratory jaw crusher makes it possible to determine the optimal level of power consumed by the crusher and efficiency in processing materials of different hardness.

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Features of material movement in a vertical chamber of a vibratory jaw crusher when producing a fine-grained product

2023

Geoteh. meh.

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Currently, vibrating jaw crushers show a fairly high efficiency of the technological process. An extensive amount of research carried out at the Dnipro University of Technology made it possible for the first time to substantiate the possibility of using a vibratory jaw crusher with a vertically located chamber and a pendulum suspension of the jaws as an independent grinding unit for the production of powder materials. The high-frequency impact nature of the load on the material implemented in vibrating jaw crushers made it possible to reduce the energy consumption and metal consumption of the plant, to increase the degree of crushing, which can reach the value i > 100. However, the specifics of the process of interaction of the material with the surface of the jaws in the vertical working chamber and the features of its unloading remain unknown. The refinement of this process was carried out by an experimental method on a laboratory sample of a vibratory jaw crusher ВЩД-130 using high-speed photography. The crusher includes the main elements: a body mounted on elastic elements, crushing jaws, articulated with the body by means of axes. The side surfaces of the crushing chamber are limited by transparent glass walls rigidly connected to the crusher body. The vertical movement of the jaws was determined by the readings of the vernier. The starting material was pieces larger than 40 mm and large bulk material with a grain size of 10…15 mm. An analysis of the nature of the movement of material throughout the crushing chamber showed the need to consider the chamber of a vibratory jaw crusher as two interconnected zones: crushing and grinding. Further studies were carried out for each zone.The productivity of the crushing zone is determined by a known method. It is necessary to create a rational profile of the working surface of the jaws on the basis of additional studies. Studies of the grinding zone made it possible to obtain a physical picture of the interaction of the material with the jaws over the period. In the lowest position, at the initial moment of unloading, the speed of the finished product is practically zero. When determining the productivity of the grinding zone, it is advisable not to take into account the unloading of the material at the initial speed.

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Dynamic Behaviour of a Vibrating Jaw Crusher for Disintegration of Hard Materials

Cited by 4 publications

References 0 publications

Prospects for the use of a vibratory jaw crusher with an inclined crushing chamber for processing of brittle materials

Prospects for the use of a vibratory jaw crusher with an inclined crushing chamber for processing of brittle materials

Definition of rational operating modes of a vibratory jaw crusher

Features of material movement in a vertical chamber of a vibratory jaw crusher when producing a fine-grained product

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