Design And Research Of Overspeed Detection And Auxiliary Brake Device For Mine Cage

The coal mine auxiliary shaft lifting equipment mainly undertakes the lifting function of the equipment,materials and the upper and lower sides of the workers.The disc brakes and the fall arrester arranged on the coal mine ensure the safety of the transportation to a certain extent.Since the speed detection of the auxiliary shaft lifting equipment is indirectly detected by the depth indicator on the ground,it cannot effectively prevent the overspeed operation of the cage.The brake failure of the disc brake due to the overspeed of the cage still occurs,or the arrester fails to catch the arrest.,leading to the occurrence of safety production accidents.The thesis is based on the auxiliary braking and speed detection of the cage operation as the entry point of this subject,and designs the auxiliary braking device and the overspeed detection device with self-locking protection function.Based on the division principle and dynamization principle of TRIZ theory,an auxiliary braking scheme for preventing over-speed operation of the cage is proposed.In order to prevent the overturning accident when the cage is over-speeded,the auxiliary braking device is installed on both sides of the cage in a symmetrical manner.It can be combined with a disc brake and a fall arrester to achieve double braking,ensuring safe operation for improved operation.The overspeed detection device selects the radar speed sensor to realize the non-contact direct monitoring of the cage speed signal.It is programmed by LabVIEW for STM32 and uses ADC,LCD,RS232 upper and lower computer communication,dual relay and alarm respectively.Tank speed signal acquisition,real-time speed display,wireless communication with ground station,control of auxiliary brake motor forward and reverse and alarm function.Carry out the design of key components of the auxiliary brake device,and use ANSYS software to carry out static structural analysis,Six Sigma optimization analysis and parametric optimization analysis to obtain the stress cloud and deformation cloud map of key components,and analyze the results to verify the braking time.The requirements of strength and rigidity of the cans are tightly held;six sigma analysis is carried out for long and short connecting rods,and the correlation between the three parameters of length,width and height is obtained,and the parameters of stress and deformation are obtained.Parametric analysis is carried out on the supporting steel plates to obtain thickness parameters for stress and The effect of deformation;the optimized auxiliary brake device has a relative increase of 5% in strength and a relative increase in stiffness of 34%,ensuring the reliability of the device.Using ADAMS software to carry out kinematics simulation analysis on the x-direction displacement of the auxiliary braking device,the speed and acceleration in the x and y directions,and the angular displacement between the long and short links;The spring and square steel are added to replace the braking force and the collision force when the tank is tightly held,and the dynamics simulation analysis is carried out.The simulation analysis results verify the rationality and feasibility of the structural design of the auxiliary brake device.Figure [138] table [5] reference [51]...