Design Application of LQS20000 Column Strength Test Bench

2013 ◽  
Vol 744 ◽  
pp. 128-131
Author(s):  
Peng Fei Lui ◽  
Xiao Wei Shao ◽  
Xiang Hui Meng
Keyword(s):  
Test Bench ◽  
Strength Test ◽  
Loading Test ◽  
Hydraulic Support ◽  
Cylinder Strength ◽  
Stable Performance ◽  
Dual Extension ◽  
Working Resistance ◽  
Test Requirements ◽  
New Criterion

Analyzed the trend of the development of hydraulic powered support and column, this paper designs a column strength test bench with 20000KN working resistance which combined with the new release of GB25974.2-2010 for coal mine hydraulic support and jack technical conditions of Part 2 standard requirements. Through the practical application, it turned out that the test bench has reasonable structure, stable performance and it can meet all of the following Ф630 bore hydraulic support column factory test requirements. The trend of the mine-used hydraulic support column and the performed new criterion demands manufacturers to enhance the ability of test equipment. In this situation, the 20000KN column strength test bench our company designed and manufactured not only do the loading test, but also apply external load at columns by simulating the actual working conditions, which is essential to Inspection and testing of dual-extension hydraulic columns middle cylinder strength.

Design of Lifting System in Seals of the Hydraulic Support Eccentric Loading Test Bench Based on PLC and Stepper Motor

2014 ◽  
Vol 889-890 ◽  
pp. 902-905
Author(s):  
Xi Zhang ◽  
Da Long Wang ◽  
Xin Xing Liu ◽  
Miao Yu ◽  
Peng Xia ◽  
...  
Keyword(s):  
Test Bench ◽  
Programmable Logic Controller ◽  
Stepper Motor ◽  
Programmable Logic ◽  
Loading Test ◽  
Hydraulic Support ◽  
Lifting System

Make use of programmable logic controller (PLC) to control stepper motor to drive the lift of seals of the hydraulic support eccentric loading test bench, in order to make the test bench meet the demand of eccentric loading. Using the Mitsubishi FX series PLC as an example, introduce the methods and principles and realization of lifting action.

scholarly journals Mechanical Modeling of Roof Fracture Instability Mechanism and Its Control in Top-Coal Caving Mining under Thin Topsoil of Shallow Coal Seam

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Peilin Gong ◽  
Tong Zhao ◽  
Kaan Yetilmezsoy ◽  
Kang Yi
Keyword(s):  
Coal Seam ◽  
Mechanical Model ◽  
Main Roof ◽  
Stability Control ◽  
Hydraulic Support ◽  
Rock Stability ◽  
Shallow Coal Seam ◽  
Minimum Height ◽  
The Stability ◽  
Working Resistance

This study aimed to explore the safe and efficient top-coal caving mining under thin topsoil of shallow coal seam (SCS) and realize the optimization of hydraulic support. Numerical simulation and theoretical analysis were used to reveal the stress distribution of the topsoil, the structure characteristics of the main roof blocks, and the development of the roof subsidence convergence. Step subsidence of the initial fractured main roof after sliding destabilization frequently existed, which seriously threatened the safety of the hydraulic supports. Hence, a mechanical model of the main roof blocks, where the topsoil thickness was less than the minimum height of the unloading arch, was established, and the mechanical criterion of the stability was achieved. The working resistance of the hydraulic support was calculated, and the reasonable type was optimized so as to avoid crushing accident. Findings of the present analysis indicated that the hydraulic support optimization was mainly affected by fractured main roof blocks during the first weighting. According to the block stability mechanical model based on Mohr–Coulomb criterion, the required working resistance and the supporting intensity were determined as 4899 kN and 0.58 MPa, respectively. The ZZF5200/19/32S low-position top-coal caving hydraulic support was selected for the studied mine and support-surrounding rock stability control of thin-topsoil SCS could be achieved without crushing accident.

scholarly journals INDUSTRIAL TEST OF A/D CONVERTERS IN LABVIEW

2014 ◽  
pp. 43-47
Author(s):  
Stephane Raze ◽  
Dominique Dallet ◽  
Phillipe Marchegay
Keyword(s):  
Test Bench ◽  
Industrial Test ◽  
Analog To Digital Converters ◽  
Analog To Digital ◽  
Development System ◽  
Labview Development System ◽  
Test Requirements

An industrial test bench for Analog-to-Digital Converters (ADC) is presented in this article. The bench hardware has been composed with known devices of instrumentation. This hardware had been identified from ADCs under test requirements. All of hardware is handled by a software written in LabVIEW development system.

scholarly journals Justification of parameters of wheelset axle fatigue strength test-bench for railway rolling stock

2019 ◽  
Vol 294 ◽  
pp. 03008
Author(s):  
Oleksii Kuropiatnyk ◽  
Serhii Raksha ◽  
Pavlo Anofriev
Keyword(s):  
Energy Consumption ◽  
Fatigue Strength ◽  
Angular Velocity ◽  
Test Bench ◽  
Work Force ◽  
Strength Test ◽  
Rail Transport ◽  
Rolling Stock ◽  
Bench Tests ◽  
Railway Rolling Stock

The operation safety of the railway rolling stock depends directly on the strength of the base part of the wheelset – its axle. Therefore, in recent years numerous studies of theoretical and experimental nature, both for means of rail transport, and for machines containing rail track equipment are carried out. This paper substantiates the main parameters of the fatigue test bench for axles for wheelsets of railway rolling stock. We performed an analysis of the load schema for bench tests, determined the dependence of the bench work force on the parameters of the wheelset axle. In addition, we substantiated the design and parameters of vibrator. For the research, we adopted the following criteria of rationality: work force, energy consumption and longitudinal dimension of the test bench. The design is considered the best, if these criteria acquire the smallest values. The results of the research indicate that the load scheme “cantilever beam” is rational for the fatigue bench tests of the axles for wheelsets of railway rolling stock. The best design of the vibrator have to provide the test bench work force by rotating the unbalanced mass around the stationary wheelset axle. The rational vibrator contains a sectoral eccentric mass rotating at an angular velocity of about 150 s-1. In this case, the eccentric mass value is about 80 kg, and its eccentricity is 135 mm.

Kinematic performance analysis of a parallel mechanism for loading test of hydraulic support

2022 ◽  
Vol 168 ◽  
pp. 104592
Author(s):  
Siyang Peng ◽  
Zhihong Cheng ◽  
Linxian Che ◽  
Yuwei Zheng ◽  
Shuang Cao
Keyword(s):  
Performance Analysis ◽  
Parallel Mechanism ◽  
Loading Test ◽  
Hydraulic Support ◽  
Kinematic Performance

Research of Hydraulic Support Control System Based on Controller Area Network

2014 ◽  
Vol 644-650 ◽  
pp. 191-194
Author(s):  
Xiao Fei Cheng ◽  
Jun Dong Guo ◽  
Shu Long Liu ◽  
Xian Ping Cui
Keyword(s):  
Control System ◽  
Intelligent Control ◽  
Data Transmission ◽  
Test Bench ◽  
Controller Area Network ◽  
Area Network ◽  
Hydraulic Support ◽  
Hydraulic Test ◽  
Computer Communication ◽  
Communication Function

According to the characteristics of hydraulic support intelligent control, the hydraulic support control system is designed and analyzed based on Controller Area Network (CAN) technology. Through the characteristics of CAN-bus network communication, the host computer communication and monitoring requirements is researched, and the mission of function is established. The data transmission program is designed under MSComm ActiveX which accomplishes stable communication function. Based on hydraulic test bench, the reliability of data transmission is verified which provides some guidance for the development of the intelligent control.

scholarly journals Study on Control Technology for Working Faces Passing through Long-Span Abandoned Roadways

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Zhenghe Liu ◽  
Hailong Ye ◽  
Lusheng Yang ◽  
Shaohua Wang ◽  
Junwen Zhang ◽  
...  
Keyword(s):  
Plastic Zone ◽  
Impact Load ◽  
Great Influence ◽  
Coal Pillar ◽  
Field Testing ◽  
Engineering Practice ◽  
Hydraulic Support ◽  
Long Span ◽  
Working Face ◽  
Working Resistance

The width of an abandoned roadway has a great influence on the roof stability of the working face. According to the coal seam conditions of the 30106 working face in the Sanyuan Shiku mine, the advance of a working face through an abandoned roadway was studied by using theoretical analysis, similar material simulation, numerical simulation, and field testing to determine the law of stope roof fracture migration, the stress distribution characteristics, and the variation in support resistance. Several conclusions are drawn: (1) The roof of the overlying strata is fractured at the edge of the abandoned roadway in front of the coal pillar and rotates downward due to the run-through of the plastic zone between the working face and abandoned roadway. (2) The hydraulic support working resistance gradually increases with decreasing coal pillar width between the working face and abandoned roadway, and the working resistance of the support tends to peak when the plastic zone extends to the coal, resulting in 3~4 times the normal recovery. Leakage occurred in front of the support in the caving zone. (3) The analysis of the relationship between the support and surrounding rock with the mechanical model for calculating the support load allows the derivation of the support working resistance formula for a working face passing through an abandoned roadway. (4) When the working face is excavated to expose the abandoned roadway, the shrinkage of the front column of the hydraulic support is significantly greater than that of the back column, and the stability is greatly reduced. This problem can be effectively solved when the uniaxial compressive strength of the backfill ≥2 MPa. (5) The engineering practice showed that the danger of leakage and roof fracture impact load was eliminated with the mining pressure reduction after reinforcement measures were taken in the abandoned roadway. The working face passed the abandoned roadway safely, providing the theoretical basis and guidance for coal remining under similar conditions.

scholarly journals Double-Drum Test Bench for Variable Load Transfer Simulation by Electromechanical Inertia Compensation

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4322
Author(s):  
Zhichao Xing ◽  
Guoye Wang ◽  
Zhangpeng Gong ◽  
Shudong Zhang ◽  
Dongxin Xu ◽  
...  
Keyword(s):  
Performance Test ◽  
Test Bench ◽  
Dynamic Models ◽  
Load Transfer ◽  
Performance Testing ◽  
Variable Load ◽  
Vehicle Performance ◽  
High Adhesion ◽  
Vehicle Test ◽  
Test Requirements

To improve the accuracy and actual road equivalence of vehicle performance testing using test benches, a double-drum test bench that meets the test requirements of vehicle control system prototypes and in-use vehicles was designed. Dynamic models of the single-wheel test bench and the vehicle test bench were established, and mechanisms were theoretically analyzed for single-wheel variable adhesion and vehicle load transfer for equivalent testing using the variable placement angle. The mechanism of electromechanical inertia compensation was studied to realize stepless simulation of vehicle inertia and simulate dynamic load while braking. The simulation model of the vehicle test bench system was established based on MATLAB/Simulink. Simulations were carried out to verify the anti-lock braking system (ABS) performance test functionality of the test bench under high adhesion, bisectional, and low adhesion conditions. Referring to the simulation conditions, ABS tests under actual test bench and road conditions were carried out. Results demonstrated that the mechanism of variable load transfer simulation by electromechanical inertia compensation improves the equivalent accuracy compared to that of its road test equivalent, verifying the feasibility of the simulation mechanism. This study could help further improve the accuracy and reduce the cost of vehicle performance testing, thus greatly benefitting the vehicle development and testing industry.

Design of Test Bench for Flyweel of the Shaft-Seal Nuclear Coolant Pump and ANSYS Analysis

2014 ◽  
Vol 644-650 ◽  
pp. 559-562 ◽  
Author(s):  
Sheng Song Wang ◽  
Ping Hu ◽  
Hai Ni Yao
Keyword(s):  
Test Bench ◽  
Ansys Software ◽  
Shaft Seal ◽  
Element Analysis ◽  
Coolant Pump ◽  
Pump Design ◽  
Ansys Analysis ◽  
Strength And Stiffness ◽  
Test Requirements ◽  
Nuclear Coolant

Due to the test requirements of flyweel of the shaft-seal nuclear coolant pump, design the structure of the test bench.Based on the theory of finite element analysis,use ANSYS software carries on its ststic analysis to gain the displacement and the stress form in order to check the strength and stiffness,and then carries on modal analysis to get its first six natural frequency and vibration in order to verify the rationality of design.CLC :TH122

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