Mine in Shanxi Province Fluid Control Engineering Research Center

Taiyuan, China

Mine in Shanxi Province Fluid Control Engineering Research Center

Taiyuan, China
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Li J.-X.,Taiyuan University of Technology | Li J.-X.,Mine in Shanxi Province Fluid Control Engineering Research Center | Kou Z.-M.,Taiyuan University of Technology | Kou Z.-M.,Mine in Shanxi Province Fluid Control Engineering Research Center | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

According to the characteristic of the coal mine downward belt conveyor, the hydraulic speeding soft brake was studied out to achieve the safety brake of downward belt conveyor and the characteristic and working mechanism of the braking system was analyzed. Then, the test system on dynamic test of the braking system was designed and simulation test of downward belt conveyor in the normal brake, over-speed protection braking, low speed braking, sudden loss of power braking and frequent braking conditions was made. From the test results, based on constant deceleration, high pressure, no friction pair, the hydraulic speeding soft brake can achieve no friction safe braking of downward belt conveyor and can maintain the braking deceleration constant during the braking process. Also, the hydraulic speeding soft brake reduces the impact force of the braking process on the conveyor and can improve the life of the equipment. Meanwhile, the approximate zero-damping circuit of non-braking conditions can greatly reduce the heat of the system in the non-braking condition and can also ensure reliable application of the hydraulic speeding soft brake.


Gao G.-J.,Taiyuan University of Technology | Gao G.-J.,Mine in Shanxi Province Fluid Control Engineering Research Center | Kou Z.-M.,Taiyuan University of Technology | Kou Z.-M.,Mine in Shanxi Province Fluid Control Engineering Research Center | Dong X.-S.,Taiyuan University of Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

Based on previous studies of the composition of slurry particles, slurry particles were divided into three phases with different kinematic viscosity and different density using weighted average method. According to the basic theory of fluid dynamics and multiphase flow and using Fluent software, author made dynamic simulation about slurry particle concentration distribution of settlement. Via iteration method were used to fit simulation results and the mathematical model about slurry concentration distribution were obtained. Model accuracy was proved by the simulation results contrasting with the experience results.


Li J.-X.,Taiyuan University of Technology | Li J.-X.,Mine in Shanxi Province Fluid Control Engineering Research Center | Kou Z.-M.,Taiyuan University of Technology | Kou Z.-M.,Mine in Shanxi Province Fluid Control Engineering Research Center | Wang Z.-G.,Chinese People's Liberation Army
Meitan Xuebao/Journal of the China Coal Society | Year: 2011

According to coal mine work characteristic, studied one kind hydraulic impact crushing installment to be able to solve the question of the coal jamming, and analyzed composition and principle of work of the installment, carried on the simulation analysis for the dynamic characteristic of the hydraulic impact crushing installment's impacting process with the power band graph theory and the Matlab software. The simulation results show that the dual accelerating systems which is composed of differential motion cylinder and accumulator both raises the system's working efficiency, and may obtain the quite big impact. Simultaneously contrasted system's characteristic curve under different flow to explain the great flow be advantageous in enhances the system's impacting final velocity. The research indicates that hydraulic impact crushing installment provides the effective method to solve the large pieces of coal jamming in the scraper conveyor's entrance.


Kou Z.,Taiyuan University of Technology | Kou Z.,Mine in Shanxi Province Fluid Control Engineering Research Center | Yang L.,Taiyuan University of Technology
Applied Mechanics and Materials | Year: 2011

Based on the characteristics of the coal chemical industry region, an emergency response platform for serious environmental pollution accident (ERPSEPA) is designed and implemented in this paper. With the environment and safety technology as the core, the information technology as the support and with the emergency management process as the main line, ERPSEPA do a system design for this emergency platform, an integration for kinds emergency resources, and a construction for the application and database system. It realizes functions as analyzing and identifying environmental risk resources, daily management, monitoring and control, forecast and early warning, dynamic decision-making, comprehensive coordination, assessment of accident, and so on. This work is of great significance on the preventing and responding of environmental events and on the losses reducing that caused by sudden environmental accidents. © (2011) Trans Tech Publications, Switzerland.


Li J.,Taiyuan University of Technology | Li J.,Mine in Shanxi Province Fluid Control Engineering Research Center | Kou Z.,Taiyuan University of Technology
Information Technology Journal | Year: 2013

Based on elaborating the working principle of the hydraulic speeding soft brake, the study analyzed the heating characteristics of the system in two conditions of non-braking and braking. By using Fluent software, the study simulated temperature fields of key components that electromagnetic directional valve in the non-braking condition and electromagnetic proportional relief valve and oil tank in braking condition. Then, the temperature changes of the internal fluid of valves and oil tank are obtained. The temperature monitoring test system of the hydraulic speeding soft brake is established and the temperature monitoring test is conducted. Also, the temperature changes of the system in two conditions of non-braking and braking are monitored and recorded. Simulation and test results show that the hydraulic loop of non-braking condition of the hydraulic speeding soft brake is approximate zero-damping loop for low heat. Also, they show that the balance oil temperature after thermal energy generated by hydraulic speeding soft brake in braking condition has been cooled through the valve and the cooling tank is far below the normal allowable value (80°C). The valves and oil tank in braking condition have good heat dissipation capability. The research results show that hydraulic speeding soft brake can effectively convert the heat generated by the system and improve the reliability of the system so that it can ensure a reliable braking of the conveyor. © 2013 Asian Network for Scientific Information.

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