Determining the residual resource of the hammer crushers’ rotor bearings

Adigamov, Nail; Shaikhutdinov, Rafis R.; Gimaltdinov, Il'dus; Akhmetzyanov, Rishat; Basyrov, R. Sh.

doi:10.1051/bioconf/20201700239

Cited by 4 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The work [30] indicates the low reliability of feed crushers, among which the majority are hammer crushers. Most of these crushers have a service life of 10 to 13 years and are low reliability objects.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the average size of preliminary grinded wet feed particles in hammer grinders

Abilzhanuly

Искаков

Abilzhanov

et al. 2023

EEJET

View full text Add to dashboard Cite

In the conditions of farms, it becomes necessary to grind feed that has a different degree of moisture. Therefore, the choice of universal working bodies is the object of research, and the theoretical determination of the average size of pre-crushed feed particles is of great scientific and practical importance and is a problem that needs to be solved. Proceeding from this, a constructive-technological scheme of a grinder with a universal grinding working body is proposed. The grinding apparatus is equipped with a hammer working body which has cutting edges. In this case, hammers with cutting edges crush the wet mass, and also create an air flow and work as flow accelerators at high speed. As a result of theoretical studies, the steps for arranging these working bodies were determined. Analytical expressions are obtained for determining the average length of pre-crushed feed particles depending on the distance between the faces of replaceable knife working bodies, i.e. from the step of arranging them in rows. At the same time, the calculation results showed that with a distance between the faces of replaceable hammers of 20 mm, the value of the average length of the grinded particles was 38.38 mm. The average size of pre-crushed particles from feed raw materials intended for farm animals was 37.64 mm, i. e. the difference between theoretical and actual value is only 2.0 %. This proves the reliability of the obtained analytical expression, which provides the determination of the main parameter of the grinding working body, i. e. spacing of radial knives in rows. The proposed method of determining the average length of crushed particles allows theoretically finding and planning the required particle size

show abstract

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the average size of preliminary grinded wet feed particles in hammer grinders

Abilzhanuly

Искаков

Abilzhanov

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

“…Basically, emergency stops occur due to the destruction of the rotor bearings. In the event of a sudden failure, unscheduled repairs and a decrease in production efficiency occur [88]. In a hammer crusher, when the rotor rotates, the hammers simultaneously swing around their axes.…”

Section: Engineeringmentioning

confidence: 99%

Impact elements of feed grinder: a review

2023

View full text Add to dashboard Cite

The article deals with the issue concerning the working bodies of technological equipment designed for grinding pieces and particles of feed raw materials. The most profiTable feed raw materials are by-products and waste materials of animal origin, which have a valuable high-protein content. An alternative way of mandatory waste disposal is their processing, including mechanical grinding to obtain feed products. In the process of grinding, particular importance is given to the working bodies, with the help of which the raw material is directly divided into parts. In this case, the destruction of the feed material often occurs by means of impact. Impact phenomena have proven to be highly effective in the process of intense cracking and chipping, which leads to the desired separation of the crushed particles into smaller ones. However, it is found that crushers have insufficient efficiency of impact elements. The work analyzes the processes of impact grinding from the standpoint of a number of scientific hypotheses, theories, modeling, simulation, experience and approbation, presented in various scientific publications. When studying and improving the theory of impact, attention is paid to nonlinear problems, cracking, modernization of the theory of brittle fracture, diagrams of force changes during impact force, impact equations, wave theory of impact, peridynamic theory. It should be noted that the main scientific results are directly reflected in the improvement of the design features of hammers. It has been revealed that the main improvement in the design of impact elements is in the direction of increasing the efficiency of working surfaces and developing the combination of impact with cutting, abrasion and crushing

show abstract

“…В частности, пробег до списания лучших автотракторных средств составляет 1…1,5 млн км. Однако ресурсные параметры узлов и деталей в силу ряда условий могут существенно отличаться от эталонных [11].…”

Section: Doi удк 621432unclassified

Study of the Output Characteristics of Turbocompressors of Modern Agricultural Machinery

Gricenko¹,

Kozhanov

Медведев

et al. 2023

Vestnik of Kazan State Agrarian University

View full text Add to dashboard Cite

The main causes of malfunction of turbocharged internal combustion engines are high dynamic loads, significant thermal loads in friction zones, wear of turbocharger elements, overheating of components and systems, oil starvation, etc. The reliability of the output parameters of the turbochargers depending on the variable input data values. A condition has been obtained for the trouble-free operation of turbocharger bearings, taking into account oil pumping at engine start, which makes it possible to determine the limits of turbocharger performance and to exclude failure cases with a guarantee. A methodology has been developed for analyzing the sensitivity of the run-out time with oil parameters and turbocharger operation modes, which makes it possible to evaluate the correct operation of turbochargers of modern automotive vehicles in operation. The main test object is K27-145 turbocharger installed on KAMAZ vehicles. The rotor shaft speed, depending on the configuration, is 40.000...120.000 min-1. During the implementation of the experimental work, the working frequency range of rotation of the turbocharger rotor shaft was provided from 25.000 to 75.000 min-1. The levels of variation of rotational speeds were chosen from the condition of providing the maximum frequency - 75000 min-1, the frequency corresponding to average loads - 50000 min-1 and the minimum at which the boost pressure rises to the level of atmospheric pressure - 25000 min-1. The results of the experiment, carried out within a wide range of changes in the input parameters of the oil at the input values of the oil pressure - 0.1 ... 0.4 MPa and the temperatures of the input oil into the bearing - 50 ... run-out from variable input parameters. The run-out time of K27-145 turbocharger rotor at speeds of 25.000, 50.000 and 75.000 min-1 is 10.3…14.8 s, respectively; 28.1…34.4 s; 38.6…47.1 s. The sensitivity of the run-out time with an increase in the rotational speed from 25000 to 75000 min-1 with a variation of 25000 min-1 increases and for the same frequency values it is - 6.6 ... 8.3 s/MPa; 10.6…14.3 s/MPa; 12.0…18.6 s/MPa. Control of run-out time sensitivity parameters allows to determine the quality of the process of assembly and running-in of turbocharger units in the factory, in operation - the correct functioning and resource of the turbocharger. The developed method of rundown control is recommended for machine-building, car service and training organizations.

show abstract

Determining the residual resource of the hammer crushers’ rotor bearings

Cited by 4 publications

References 4 publications

Determination of the average size of preliminary grinded wet feed particles in hammer grinders

Determination of the average size of preliminary grinded wet feed particles in hammer grinders

Impact elements of feed grinder: a review

Study of the Output Characteristics of Turbocompressors of Modern Agricultural Machinery

Contact Info

Product

Resources

About