| As the most core mechanical equipment in the drilling operation,hydraulic rock drill is widely used in railway tunnel driving,highway construction and mining industries.The drilling efficiency of hydraulic rock drill directly affects the work efficiency of related industries.At present,the design theory of the hydraulic rock drill is still in the linear design method,and the designed equipment has low working efficiency.At present,most of the hydraulic rock drills do not have the function of automatic matching of output parameters and rock properties.In view of these two problems,this paper studies the front cavity atmospheric pressure hydraulic drilling machine,optimizes its design parameters,and studies the parameter self optimization control system of the hydraulic drilling machine.In this paper,firstly,the working principle of hydraulic drill is analyzed in detail,and the linear model of impact mechanism is established based on the abstract variable design method,and the main parameters of impact mechanism are designed accordingly.Then the simulation model of hydraulic drill is established on AMESim platform according to the design parameters.The simulation results verify the feasibility of the abstract variable design method.The dynamic characteristics of hydraulic drill and the influence of various parameters on its mechanical properties are studied by simulation model.On this basis,the mass of impact piston,effective action area of front and rear chamber and effective volume of high-pressure accumulator are selected as optimization variables,with the aim of improving impact power and system efficiency as optimization objective,orthogonal test is designed,test data are applied,corresponding regression proxy model is established,and multi-objective optimization selection of optimization variables is carried out by genetic algorithm.As a result,impact power is increased by 2.53 k W,the system efficiency is increased by 20.01%,which verifies that this optimization method has good optimization effect.Finally,the parameter self-optimizing control system of hydraulic drill is studied,the control scheme is determined,and the feasibility of this method is demonstrated by applying variable-step climbing algorithm as self-optimizing method.The software and hardware of theself-optimizing control system are designed and the control program is written.The research content of this paper provides a theoretical basis for the study of improving the system efficiency of the hydraulic rock drill,a new optimization method for the optimization design of the structure and working parameters of the hydraulic rock drill,and is of great significance for the study of the self optimization control system of the parameters of the hydraulic rock drill as well as the improvement of the drilling efficiency. |
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