XI16E1 ABB Module
Brand ABB Color Standard Application Industrial height 395mm rated current 320mA
Protection Level IP45 Suitable for motor power 273KW Application Site Power Industry Material Code GJR2391500R1220 Power industry HIEE401782R0001 Part number XI16E1
Applicable pipe 2 Whether imported is weighing 3.18 kg can be sold nationwide
XI16E1 ABB Module
Before the design of hydraulic support, it is necessary to carry out the overall design, and the design content is mainly the selection of structural form, the design of support size, the determination of the rationality of parameters and the deployment of a series of control systems. The rationality of the overall design of the plate hydraulic support determines the working characteristics and stability of the support, and the factors such as the use of the support and applicable conditions should be comprehensively studied in the design. The top beam of the support is the main bearing component of the support, and its importance is self-evident, while the support base mainly supports the support and bears the load of the bottom plate. In order to improve the economic performance of the support to a large extent, this paper adopts the multi-objective optimization method to optimize the size of the base of the plate hydraulic support.
Introduction to multi-objective optimization
Optimization of the objective function is one of the main research methods in various fields at present. When optimizing the size of the support base, it is necessary to consider several factors such as stress, deformation and strength, so the optimization method is multi-objective optimization. Multi-objective optimization methods mainly include coordination curve method and design analysis method:
a) Coordination curve method.
In the design range, the constraint surface and equipotential line of the objective function are found, and the coordination relationship between them is drawn, and the optimal solution of the objective function is obtained under the control of certain criteria.
b) Design analysis.
The optimal solution of the objective function is found based on all the constraints, and then the optimal solution is reasonably coordinated according to the design criteria to make it meet the requirements of the design criteria, which also finds the best coordination relationship. The finite element software ANSYS can solve the relationship between the specific parameters of the research target and the design variables under different working conditions, and then calculate the sensitivity of the influencing factors of the research target and the influence degree of each factor, so as to obtain the optimal solution of the research target.
Target optimization pre-processing
In the mining process of the mine face, the loading condition of the plate hydraulic support is relatively complicated, and the loading form is different under different advancing distances. Therefore, the load mode which has significant influence on the stability of the support should be studied in this paper when conducting dimensional optimization analysis. According to the structure and morphology of the plate-type hydraulic support base, combined with a large number of field experience, it can be seen that the probability of the base instability is high when both ends of the base are subjected to concentrated stress or torsional load. Therefore, based on the size optimization of the plate-type hydraulic support base under these two working conditions, the optimization parameters should be determined after the support base model is built under different working conditions. The main parameters include the form of variable, objective function and boundary constraint.
1. The design material of the plate hydraulic support base is fixed. Optimizing the size of the base on the one hand can save the design material, on the other hand, it is equivalent to reducing the quality of the support and improving the migration rate of the support with the advance of the working face. The main components of the support base plate, transverse reinforcement plate, vertical reinforcement plate, slotted steel and cover plate need specific design;
2. The objective functions that need to be considered when optimizing the size of the plate hydraulic support base include:
(1) Strength requirements of the base, requiring the concentrated stress of the base under different working conditions to remain below the ultimate strength;
(2) To meet the requirements of stiffness, the deformation of each part of the base should be controlled at a low level;
(3) Reduce the weight of the support as much as possible;
3, the thickness of the support bottom plate should be kept within a certain range, when the thickness of the bottom plate is too small, the strength of the base is low, it is easy to produce plastic yield under the action of large loads, and when the thickness of the bottom plate is too large, the toughness and welding stability of the base is low, which is also not conducive to the stable work of the support. The support base mainly supports the support and bears the load of the bottom plate. In order to improve the economic performance of the support to a large extent, the multi-objective optimization method is adopted to optimize the size of the base of the plate hydraulic support. The main conclusions are as follows:
1) In the study of size optimization, the rationality of the design parameters should be judged according to the position distribution of the target points of the support base. The initial design parameters can be proved to be reasonable only if both feasible and infeasible points exist in the target points;
2) The specific parameter values after optimizing the size of the support base are: The bottom plate is 28mm thick, the vertical rib plate is 25mm thick, the transverse rib plate is 28mm thick, the cover plate is 33mm thick and the insert steel is 25mm thick. The optimization scheme can reduce the weight of the base by 590kg. The numerical simulation verification of the rationality of the scheme shows that the stress and deformation of the support base are kept at a low level, indicating that the optimization results are reasonable
XI16E1 ABB Module
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