Key Technology Analysis And Research Of Advance Support Equipment Based On Overhead Monorail

The rate of mine roadway support determines the efficiency of coal mining; The supporting quality and the safety of underground staff are closely related. In recent years, with the fully-mechanized coal winning technology developing, the appropriate roadway support equipment is lagging behind it, which influences the mining efficiency and increases the labor intensity of underground staff because of the backward technique. Overhead Monorail has many outstanding performance as a kind of auxiliary track transportation equipment:its running not affected by the complex roadway conditions; little effect on the space of mining equipment for the operation; good mobility property. In this paper, based on monorail crane, its power unit, bearing guide mechanism and the overall shape were all redesigned. Installing the advance support platform, this paper completed the analysis and research on advance support equipment based on monorail.This article created a two-dimensional model of the overall structure of the device according to the design ideas and analyzed the function of each part; The assembly of monorail running tracks meets certain specifications including its angle in both the horizontal and vertical directions which must meet appropriate safety requirements, so the design of bearing guide mechanism and the crane’s dimensions must be on the basis of the requirements. It also analyzed the device’s turning radius and passable gradient, the structure size of domestic mine roadways and the current common advance support equipment, using SolidWorks modeling software to create a three-dimensional model of advance support platform.Analyzing the driving principle of the drive unit and establishing the three-dimensional model of the drive mechanism, this paper provided an innovative design on the drive wheels’pressure, introduced the commonly used pressure-holding circuit and showed the principle of a spring as a buffer member. The force on the driving wheels and the formation of rolling resistances were analyzed; the necessary positive pressure were calculated and verified in certain size of wheels; the main parts of the power plant (motors, hydraulic cylinders and brake springs) were selected and designed. Using SolidWorks, this paper established a three-dimensional model of the brake system and analyzed the monorail common braking hydraulic circuit and its limitations, introducing the principle of full hydraulic brake system. According to this, this article designed an innovative service hydraulic brake system.The mainly mechanical parts (motor sleeve and brake connecting arm) and the supporting platform were received materials’ selection and strength analysis, referring to the ANSYS software which output equivalent stress field and displacement contour plot to complete the verification.According to the special working conditions, this paper determined the design ideas and design guidelines for overall hydraulic system, including braking hydraulic system, advance supporting hydraulic system and driving hydraulic system which consists of motor reversing circuit, balance circuit, buffer circuit and feed circuit. This paper expounded each circuit’s principle, built the association between all the subsystems and completed the feasibility analysis.According to the preliminary design, this paper built a three-dimensional model of the emergency brake mechanism using the SolidWorks and simplified the model for the simulation and assembly. Building the data conversion between SolidWorks and Adams, this paper completed the simulation pre-treatment in Adams, including work environment settings, material definitions, adding constraints and force; by applying different driving force, this thesis obtained the size of the emergency braking force and analyzed the braking time when the crane was in the speeding state and its braking performance.