February Volume 1.
No-1 and reviews Q1 technology technology news and Q1 technology news and reviews Volume 1.
No.
February 2024 Chief editor Ahmed Professor of Computational Mathematics and Numerical Analysis Faculty ofEngineering.
Zagazig University.
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Egypt.
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Published by Millbank Lomdon SW1P Issued Bimonthly OPEN ACCESS Copyright A 2024 by Millbank Lomdon SW1P February Volume 1.
No-1
CHIEF EDITOR
Ahmed Professor of Computational Mathematics and Numerical Analysis Faculty ofEngineering.
Zagazig University.
Zagazig.
Egypt.
Box 44519
EDITORIAL BOARD
Yu Li Wuhan University of Technology,China Seung Man Yu Seoul National University of Science andTechnology.
South Korea Seyed Saeid Rahimian Koloor Universiti Teknologi Malaysia.
Malaysia Eko Susanto Menegment of journal Indonesia Siti Mazlina Mustapa Kamal Universiti Putra Malaysia.
Malaysia
Q1 technology news and reviews ANALYSIS OF ANGULAR VELOCITIES OF BELT CONVEYOR DRUMS
AND CONVEYOR LOAD CHANGE DEPENDENCE ON TECHNOLOGICAL
RESISTANCE
Jumaev Akbarjon Sayfullaevich Almalyk branch of Tashkent State Technical University named after Islam Karimov Doctor of Philosophy in Technical Sciences (PhD).
Associate Professor jumaev@mail.
Ashirov Alisher Abdujapparovich Almalyk branch of Tashkent State Technical University named after Islam Karimov Assistant @ashirovalisher6284 Ibragimova Nodira Ilkhomovna Almalyk branch of Tashkent State Technical University named after Islam Karimov Assistant mahliyoturdaliyeva@gmail.
Abstract.
The article presents ideas about the reliability and durability of belt conveyors in mining enterprises today, as well as the constantly increasing requirements for equipment.
Graphs of the dependence of the angular speeds of the recommended belt conveyor drums and the change of the driver load on the technological resistance and the resistance moment of the friction force and the torque of the friction force are given and their recommended values are given.
According to this, the analysis of scientific studies has been carried out that when bushings with belt elements are used in drums, it is possible to increase the UVK compared to the traditional one due to the reduction of the amplitude of vibrations in it.
Keywords.
Conveyor, drum.
belt element, deformation, loading, transportation, amplitude, vibration, technology.
Today, belt conveyors are considered as a means of transport for the continuous supply of minerals in mining enterprises, modeling their activity taking into account economic efficiency indicators, studying the influence of parameters of open and closed quarries on the choice of technological schemes for the transportation of minerals.
scientific research is being carried out.
In this regard, one of the urgent tasks is to determine the optimal area of application of the technological schemes of transportation of mining mass using belt conveyors in the organization of continuous transportation of mineral resources in the horizons of deep pits, and to develop the optimal technological scheme of transportation of mining mass in the further development of deep quarries.
If mineral resources are mined from open quarries, when the depth of the quarry is more than 600 meters, the maximum movement volume of mineral extraction mass during one year and their transportation work will increase significantly.
In this situation, the cost of transportation will be 60% and more as the quarry depth increases.
For this reason, additional studies were conducted to determine the patterns of impact of the volumes of rocks extracted from the quarry on the mining machines.
As a result, the main parameters of the quarry were selected for conducting scientific research, and belt conveyors were organized depending on the weight of the rocks and the depth of the February Volume 1.
No-1 quarry, which would allow the selection of transport machines for deep quarries .
, .
In theoretical research, it is important to study the law of motion of belt conveyor drums, to determine the limits of angular velocity changes, to recommend optimal values as a result of studying the effects of loading and changes in the dissi pativecohesion characteristics of the belt, technological resistance and inertial parameters on the law of motion .
, .
Fig.
1 shows graphs of dependence of the angular speeds of the leading and driven drums with the belt element of the proposed belt conveyor bearing and the change of the driver load on the technological resistance and the resistance torque of the friction where, 1 Ae N 1 = f (Mre.
2 Ae N 2 = f (Mre.
4 Ae Menj = f (Mre.
3 Ae Mfric = 43 Nm.
4 Ae Mfric = 26 Nm.
Figure 1.
Graphs of angular velocities and conveyor load variations of the leading and driven drums with a belt element of the proposed belt conveyor bearing support and technological resistance dependence graphs Based on the graphical connections, when the values of Mres change from 0.
15a102 Nm to 5a102 Nm, the torque on the drive shaft increases from 0.
17a102 Nm to 0.
86a102 Nm, while the torque of the friction forces increases from 0.
11a102 Nm It can be seen that it reaches 0.
41a102 Nm.
It can be seen that the difference between the angular velocities of the drums decreases as the technological resistance increases.
The main reason for this is that even if the deformation values of the belt are large under a large load, the change intervals are small.
In particular, it can be seen from the equation that when the values of Mres increase from 0.
2a102 Nm to 1.
5a102 Nm, the values decrease linearly from 0.
305a102 s-1 to 0.
274a102 s-1, and the angular velocity of the leading drum decreases from 0.
283a102 s-1 to 0.
256a102 s-1 can be determined.
The difference between the angular velocities, as we noted above, occurs due to the rotation of the conveyor belt, due to the change in friction, due to a sufficient level of sliding.
It should be noted that the reduction of belt vibrations at the expense of the composite roller shock absorber also leads to a reduction of the angular speed fluctuations of the drums.
However, by ensuring that the belt vibrates at the required level, it causes the transported ore to be level.
Therefore, it is recommended to achieve the values of technological resistance .
3 y 1.
102 Nm from, and the torque of friction force does not exceed .
Nm.
Q1 technology news and reviews where, 1, 2 Ae OI N 2 = f (Mre.
3, 4 Ae OI N 2 = f (Mre.
1, 3 Ae c2 = 380 Nm/rad.
2, 4 Ae c2 = 260 Nm/rad Figure 2.
Graphs of dependence of angular speeds of belt conveyor drums on technological resistance Figure 2 shows graphs of dependence of belt conveyor drums angular velocities, vibration range, technological resistance and friction moment.
In this case, when the technological resistance and Mres incoming resistance increase from 0.
25a102 Nm to 1.
98a102 Nm, the angular velocity of the driving drum increases in a non-linear pattern from 0.
46 sAe1 to 2.
95 sAe1 when the vibration range is c2 = 260 Nm/rad.
can be achieved (Fig.
2, graph .
Correspondingly, when the rotational speed coefficient of the conveyor belt increases to 320 Nm/rad, the range of oscillation of the angular velocity of the driving drum increases from 0.
42 sAe1 to 2.
19 sAe1, and the values of OI N 1 only increase 11 sAe1.
In this case, the maximum difference between OI N 1 and OI N 2 reaches .
0 y 1.
sAe1 when Mres Mfric = 2.
0a102 Nm (Fig.
2, graphs 2, .
According to the results of experimental studies, to ensure that the angular velocity of the driving drum is within the range of OI N 2 O .
10 sAe1, c2 O .
Nm/rad coming from the transported ore and it is recommended that the torque of the friction force should be in the range of technological resistance Mres Mfric = .
3 y 1.
Nm.
As mentioned above, increasing the speed of belt rotation causes the angular velocities of the drums to converge and decrease OI N 1 and OI N 2 .
Figure 3 shows graphs of the dependence of the angular speed of the belt conveyor drums on the vibration range and the load on the conveyor on the changes in the moments of inertia of the February Volume 1.
No-1 1 Ae OI N 1 = f (Jd.
1 Ae OI N 1 = f (Jd.
3, 4 Ae Mener = f (Jd.
3 Ae Mres Mfric = 0.
75a102 Nm.
4 Ae Mres Mfric = 1.
25a102 Nm Figure 3.
Graphs of the dependence of the angular speed of the belt conveyor drums, the vibration range and the load change on the conveyor on the change of the moments of inertia of the drums It is known that with the increase of moments of inertia in rotating joints, the motion becomes Therefore, in order to obtain the angular velocity unevenness coefficient within the desired limit, the moment of inertia values are chosen accordingly.
It can be seen that when the moment of inertia values of belt conveyor drums are increased from 0.
32 kgm2 to 0.
45 kgm2, the values of OI N 1 decrease nonlinearly from 2.
12 sAe1 to 0.
36 sAe1, and the angular velocity of the driving drum decreases from 2.
9 sAe1 to 0.
82 sAe1 can be seen (Fig.
3, graphs 1, .
In order to keep OI N 2 in the desired range, it is recommended that Jb1 = .
45 y 0.
kgm2 and Jb2 = .
42 y 0.
should be noted that as the moment of inertia of the drums increases, the load on the electric conductor also increases.
For example, when Jb1 = Jb2 = 0.
45 kgm2 increases to Mres = 1.
25a102 Nm, it can be seen that Mener values increase from 0.
46a102 Nm to 0.
83a102 Nm, i.
up to two Therefore, the moment of inertia of drums is limited.
Summary.
In order to ensure uniform distribution of transported ore on the basis of vibrations of the belt, it is recommended to achieve values of technological resistance and friction moment not exceeding .
3 y 1.
102 N.
The effect of technological resistance and friction torque on the variation of the angular speed of the belt conveyor drums on the variation of the vibration range was studied, the angular speed of the leading drum was determined to be in the range of OI N 2 O .
21 y 0.
10 sAe1 to ensure c2 O .
21 y 0.
Nm/rad, the formula for determining the technological and friction torque coming from the transported ore was obtained.
In this case, it was found that the torque of the friction forces decreases due to the deformation of the rubber
Q1 technology news and reviews References