Dynamic Analysis of Shearer Traction Unit Considering the Longitudinal Swing

Ma, Dejian; Zhang, Xin; Wan, Lirong; Zeng, Qingliang; Ge, Hongen

doi:10.3390/en13205293

Cited by 8 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many important energy sources on earth, such as geothermal energy and natural gas. , Coal, as an important part of primary energy, , plays an important role in world energy security. , The fully mechanized top coal caving technology has obvious advantages in medium and thick coal seams . However, the precise control of the coal caving mechanism is the key to achieving high yield and high efficiency of the fully mechanized top coal caving technology .…”

Section: Introductionmentioning

confidence: 99%

Vibration Response Analysis of the Tail Beam of Hydraulic Support Impacted by Coal Gangue Particles with Different Shapes

et al. 2022

Self Cite

View full text Add to dashboard Cite

The existing research on coal gangue identification based on vibration usually assumes that coal gangue particles are ideal shapes. To understand the vibration response difference in hydraulic support caused by coal and gangue with real shapes, this paper uses a three-dimensional (3D) scanning technology to determine the real shape of coal particles. The process of coal and gangue impacting the tail beam at different angles was simulated in the LS-DYNA software package, and the effects of shape parameters, velocity, and coal strength on the difference in vibration signals caused by the two were analyzed statistically. The conclusions are as follows: the vibrational response of the tail beam is concentrated mainly in the area between the ribs. The regularity of the velocity signal caused by gangue is better than the regularity of the velocity signal caused by coal, and the attenuation speed of the acceleration signal of gangue is slower than the attenuation speed of the acceleration signal of coal. The probability distributions of the velocity and acceleration responses were analyzed statistically, and the results show that the results from coal can be well fitted by a logarithmic normal function, and the standard deviations of velocity and acceleration are 0.05591 and 489.8, respectively. The gangue results are fitted by the gamma function and the Weibull function, and the standard deviations are 0.13531 and 737.9, respectively, showing that the fitting function has the potential to be used as the basis for coal gangue identification. The change in coal strength has little effect on the vibration response of the tail beam. With increasingly falling velocity, the vibration signal intensity of the tail beam increases, but the discrimination between coal and gangue weakens; therefore, measures should be taken to reduce the falling velocity of the rock mass. The research results of this paper can provide a reference for further study of coal gangue identification methods based on vibration.

show abstract

Section: Introductionmentioning

confidence: 99%

Vibration Response Analysis of the Tail Beam of Hydraulic Support Impacted by Coal Gangue Particles with Different Shapes

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The poor working environment and high working intensity of shearers result in many serious problems. Many researchers have conducted studies on the cutting performance of picks [2][3][4] and drums and the reliability of traction units [5][6][7]. Due to the widespread mining of coal due to industrialization, the reservation of thick and medium-thick coal seams, which are less difficult to mine, is gradually decreasing, and the thin coal seams with a rich reservation have attracted increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Effect of Drum Barrel on Coal-Loading Performance of Thin-Coal-Seam Shearer Machines

et al. 2022

Self Cite

View full text Add to dashboard Cite

Thin-coal-seam shearer mining efficiency is seriously restricted by the poor loading performance of the drum. The loading of the drum to the cracked coal lumps is based on a screw-conveying mechanism, and its loading performance is influenced by many structural parameters, including drum width, helical angle, axial tilt angle, number of blades and form and diameter of the barrel. The barrel diameter directly influences the drum envelope zone’s capacity, and its influence on loading performance is not yet clear. Therefore, this work first compared the drum-loading results between experiments and numerical modeling, and the results proved that the application of the discrete element method (DEM) to the modeling drum loading process is feasible and the results are reliable. Secondly, the influence of barrel diameter on particles’ axial velocity, loading rate and web depth was studied using the ejection and pushing modes. The results showed that the particles’ axial velocity has a noticeable impact on loading rate under ejection loading conditions, and the loading rate first increases and then decreases with the increase in barrel diameter. When the diameter is less than 700 mm in drum-pushing modes, the particles’ axial velocity plays an important role on drum loading; the filling level has an obvious impact on loading performance when the barrel diameter is larger than 700 mm. The drum loading ejection rate is 25% higher than that of pushing mode, which is due to the loading rate of particles located in a web depth from 300 to 600 mm. The influence of barrel diameter on loading performance using drum ejection is more obvious than that in pushing mode. The results provide a reference for drum structural design to some extent.

show abstract

“…The unknown gear meshing deviation is easy to cause uneven load distribution, which leads to the unbalanced power of the dual-motor in shearer traction unit. 1,2 In engineering applications, due to manufacturing errors and parameter drift, even if the model of each motor is the same, its mechanical characteristics are difficult to be completely consistent, which leads to deviations of output power for dual-motor. One of dual-motor works in light load state, and the other motor works in overload state, which leads to the failure of the traction drive system.…”

Section: Introductionmentioning

confidence: 99%

Study on new frequency conversion control system and power balance control method of dual-motor for shearer traction unit

Mao

Zhang

et al. 2022

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The drive system of shearer traction unit is affected by complex load interference and system structure, which results in the problem of unbalanced power of dual-motor of shearer traction unit. A new type of dual-motor frequency conversion control system for shearer traction unit with “common rectification and dual inverters” is designed. And a dual-motor power balance control method based on particle swarm optimization torque cross-coupled control is proposed. The new frequency conversion control system adopts a parallel structure of two inverter circuits with a common DC bus. Particle swarm optimization is used to optimize the PID control parameters of torque cross-coupling control, which solves the problem that it is difficult to gain optimal PID parameters. The control model is established using Matlab/Simulink simulation software. The proposed control method and the master-slave control method are compared by simulation. The results show that the control effect of proposed control method is better synchromization and power balance effect than the master-slave control method. The proposed control method is applied to dual-motor control of shearer traction unit for experimental verification. The results indicate that the proposed power balance control method realizes that the output torque ratio of dual-motor is between 0.9 and 1.1.

show abstract

Dynamic Analysis of Shearer Traction Unit Considering the Longitudinal Swing

Cited by 8 publications

References 25 publications

Vibration Response Analysis of the Tail Beam of Hydraulic Support Impacted by Coal Gangue Particles with Different Shapes

Vibration Response Analysis of the Tail Beam of Hydraulic Support Impacted by Coal Gangue Particles with Different Shapes

Numerical Investigation of Effect of Drum Barrel on Coal-Loading Performance of Thin-Coal-Seam Shearer Machines

Study on new frequency conversion control system and power balance control method of dual-motor for shearer traction unit

Contact Info

Product

Resources

About