Mechanics Properties Influence on Ball Mill Rotator through Sliding Shoes Position Change

2013 ◽  
Vol 694-697 ◽  
pp. 864-867
Author(s):  
Qing Yi Men ◽  
Guang Wei Cheng
Keyword(s):  
Mechanical Model ◽  
Ball Mill ◽  
Theoretical Basis ◽  
Bending Moment ◽  
Shearing Force ◽  
Strength Theory ◽  
Ball Mills ◽  
Position Change ◽  
The Third ◽  
Light Weighting

In this paper, the ball mills supported with double sliding shoes and the edge-transmission are compared. The mechanical model of ball mill supported with the double sliding shoes is established. The shearing force diagram, bending moment diagram and torque diagram are been carried out with the alteration of the double sliding shoes. After the support position improved, the felicitous rotator thickness is calculated based on the Third Strength Theory. It is showed by the calculation result; the rotator in manufacturing according to the experience is too thick. The thickness of the ball mill can be reduced. Then the weight of the ball mill can be reduced too. The light weighting design theoretical basis for large equipment is provided.

Application of Three-Moment Equation in Rudder Stock's Force Calculation

2013 ◽  
Vol 347-350 ◽  
pp. 3435-3439
Author(s):  
Bin Can Zhang
Keyword(s):  
Mechanical Model ◽  
Reaction Force ◽  
Bending Moment ◽  
Moment Equation ◽  
Strength Theory ◽  
Check Calculation ◽  
Conventional Methods ◽  
Force Calculation

The mechanical model of the rudder stock is established. The rudder stock can be simplified into a statically indeterminate beam. The reaction force from the support, torque and bending moment within the length of the rudder stock can be solved using three-moment equation. The stress in the profile of the stock is checked using the fourth strength theory. The calculation is directly carried out based on Ship Specification of Classification and Shipbuilding. Compared with the conventional methods, the results show that three-moment equation is correct and available in check calculation.

Ocena wpływu przygotowania próbek na uzyskiwane wyniki analiz pirolitycznych

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (5) ◽  
pp. 299-312
Author(s):  
Marek Janiga ◽  
◽  
Małgorzata Kania ◽  
Agnieszka Wciślak ◽  
Karol Spunda ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Organic Carbon ◽  
Sample Preparation ◽  
Carbon Content ◽  
Ball Mill ◽  
Organic Carbon Content ◽  
Ball Mills ◽  
Pyrolysis Products ◽  
Two Samples ◽  
Analysis Error

The aim of the work, the results of which are presented in the article, was to evaluate the influence of the method of sample preparation on the results of pyrolytic analyses: RockEval, Py-GC-FID (gas chromatography with FID detector) and Py-GC-IRMS (isotope mass spectrometry with gas chromatography). Mortars and ball mills are most often used to grind the samples. Three rock samples with a higher organic carbon content (shales) and five with a lower organic carbon content (including two samples of dolomites and three of anhydrites) were prepared. The rocks were homogenized and divided into three parts. Each part was ground: by hand in a mortar, in a ball mill for 5 minutes, and in a ball mill for 15 minutes. A total of 24 RockEval analyses, 48 Py-GC-FID analyses (two pyrolysis temperatures corresponding to RockEval pyrolysis conditions) and 24 Py-GC-IRMS analyses were performed. The grinding of the samples for the RockEval analyses is insignificant. The differences in the results seem to indicate the influence of the analysis error and the nature of the sample. For the Py-GC-FID methodology, the influence of milling on the results of desorption carried out at the temperature of 300ºC for most of the tested samples can be considered insignificant and negligible. At the temperature of 500ºC, various types of samples show some correlations, but they are insufficient to reject one of the methods of sample preparation. Therefore, it is important to analyze the results comprehensively, taking into account both the group composition and the distribution of pyrolysis products. In the case of the isotopic composition analyses (Py-GC-IRMS), also no differences in δ13C values related to different types of grinding samples can be found. Summarizing, all the results show a negligible influence of the method of grinding the samples on the results of pyrolysis analyses. Nevertheless, it is important that only one method of sample preparation is used for a separate sample series.

Performance Evaluation of Al2O3 Powder Dispersion by Bead and Ball Mills

2014 ◽  
Vol 682 ◽  
pp. 32-34 ◽  
Author(s):  
N.S. Belousova ◽  
O.A. Goryaynova ◽  
E.V. Melnikova
Keyword(s):  
Particle Size ◽  
Performance Evaluation ◽  
Ball Mill ◽  
Aqueous Suspension ◽  
Ball Mills ◽  
Powder Dispersion ◽  
Maximum Particle Size ◽  
Bead Mill ◽  
Maximum Particle

In this paper the results of alumina aqueous suspension disaggregation with the help of bead and ball mills are shown. The changing of maximum particle size for50 wt. % and 90 wt. % of powder (from lowest to highest size) in suspension dispersed by a bead mill for one hour and ball mill for 48 hours was fixed. In order to achieve powder parameters given by the manufacturer disaggregating process sets was defined.

scholarly journals Trzy typy manipulacji z punktu widzenia teorii działania

2016 ◽  
Author(s):  
Janusz Maciaszek
Keyword(s):  
Theoretical Basis ◽  
Theory Of Action ◽  
Short Term ◽  
The Third ◽  
Practical Syllogism

By manipulation one can understand an abuse of the influence on other people. As the term ‘abuse’ is vague and unclear, one cannot decide in every instance whether it is an abuse of influence or whether the influence on other people is justified. In the paper I distinguish three types of actions consisting in exercising influence on other people. The theoretical basis for this typology is Donald Davidson’s theory of action, and in particular his notion of reason of action and practical syllogism. The first type of influence consists in modification of rather constant beliefs, preferences, and values. The typical example of an action of this type is brain-washing, The second type of action is modification of short-term attitudes, e.g. beliefs about the environment, wishes and preferences in special situations, etc. The typical example is advertising. In the third type the manipulator does not try to modify attitudes but he intends to provoke “acratic” actions, i.e. actions being the result of week will. The typology permits, at least partially, to precise what the abuse consists in for every type of influence.

Shearing force and bending moment

1990 ◽  
pp. 10-20
Author(s):  
D.H. Bacon ◽  
R.C. Stephens
Keyword(s):  
Bending Moment ◽  
Shearing Force

The Study of FEM for Internal Force Analysis of the Sluice Structure

2011 ◽  
Vol 71-78 ◽  
pp. 3275-3279
Author(s):  
Xiao Na Li ◽  
Tong Chun Li ◽  
Yuan Ding
Keyword(s):  
Cross Section ◽  
Bending Moment ◽  
Internal Force ◽  
Force Balance ◽  
Shearing Force ◽  
Force Analysis ◽  
Reconstruction Project ◽  
Unit Stress ◽  
Reinforcement Design

This paper takes a sluice reconstruction project as an example. The constraint internal force, the related axis force, bending moment, and shearing force at the corresponding section are solved according to the unit stress and internal force balance. Furthermore, technology of mesh auto-generation in cross-section is utilized to plot the internal force graph of the structure directly, which will provide reference for reinforcement design and make it more convenient.

scholarly journals Electromechanical Dynamic Behaviour and Start-Up Evaluation of Tumbling Ball Mills

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Weidong Lv ◽  
Guoqiang Wang ◽  
He Tian
Keyword(s):  
Dynamic Model ◽  
Ball Mill ◽  
Electromechanical Coupling ◽  
Coupling Model ◽  
Angular Speed ◽  
Experimental Results ◽  
Ball Mills ◽  
Start Up ◽  
Dynamic Simulator ◽  
Simulation Results

This paper presents a dynamic simulator of the electromechanical coupling start-up of a ball mill. The electromechanical coupling model based on the dynamic model of the ball mill, the characteristic equation of the clutch, and the dynamic model of the induction motor is established. Comparison between the simulation results of angular speed, load torque and current obtained from the model, and the experimental results is conducted to validate the correctness of these simulation results. Results show that the simulation results of the electromechanical model are highly consistent with the experimental results. Two indexes are proposed for evaluation. Finally, a 4500 kW ball mill is used to analyse the start-up process with different operation parameters of the air clutch. The effect of the engagement time and the pressure of the air clutch on the torque, current, and shock extent is analysed. Moreover, the optimum inflation time is determined.

Modal and Harmonic Analysis of Girth Gear With Dual Mesh Pinions by Using Finite Element Method

2019 ◽  
Author(s):  
Venkatesan Venkataraman ◽  
Malar Mohan Keppanan ◽  
Vinoth Dhanasekaran
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Harmonic Analysis ◽  
Ball Mill ◽  
Exciting Force ◽  
Ball Mills ◽  
Successful Operation ◽  
Element Analysis ◽  
Fundamental Frequencies ◽  
Dual Mesh

Abstract In industrial ball mills, monitoring of girth gear and dual mesh pinion gearboxes are required for successful operation. In this paper, the dynamic response of an industrial ball mill is investigated through finite element analysis using ANSYS. A half symmetry model of the ball mill drive with anti-symmetry option is considered for the Finite element study to reduce the analysis time. Modal analysis is performed to extract the fundamental frequencies. A sufficient number of modes are extracted to capture at least 80 percent of total mass in each direction. Then, a harmonic analysis is performed by introducing a periodic exciting force on the ball mill. The dynamic response of the ball mill during resonance is studied.

Model Tests and Numerical Simulation on Effect of Spudcan Penetration on P-Delta of an Adjacent Pile

2019 ◽  
Author(s):  
Jianhua Wang ◽  
Yifei Fan ◽  
Dong Guo
Keyword(s):  
Penetration Depth ◽  
Bending Moment ◽  
Fine Sand ◽  
Lateral Load ◽  
Model Tests ◽  
Constraint Condition ◽  
Pile Head ◽  
Load Direction ◽  
Position Change ◽  
Before And After

Abstract Model tests under 1g condition and numerical simulations of spudcan penetration in the silty fine sand were conducted to study effects of spudcan penetration on the p-delta effect of adjacent free-head and elastic-head piles subjected to lateral and vertical head loads. The p-delta factors were defined and determined based on the maximum pile shaft bending moments and pile head deflections before and after spudcan penetration, which were used to analyze the variations of the p-delta effect with the spudcan penetration depth. The conclusions were obtained as follows. The p-delta effect depends on the pile head constraint condition, the direction of the lateral pile head load and the spudcan penetration depth. For a free-head pile, the p-delta factors decrease with increasing the spudcan penetration depth. For an elastic-head pile, the p-delta factors also decrease during spudcan penetration and the decreases depend on the spudcan penetration depth and the lateral pile head load direction. The decrease associated with the lateral load direction facing back to the spudcan is larger than that associated with the lateral load direction facing to the spudcan. Therefore, the spudcan penetration does not increase the p-delta effect of adjacent piles subjected to lateral and vertical head loads. But the maximum bending moment and its occurring position change during spudcan penetration.

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