Research On The Key Technology Of Split Hydraulic Dam

At present,the retaining dam is used in the treatment of low head rivers in China,which mainly includes three types of them,namely rubber dam,shutter dam and hydraulic lifting dam.Rubber and shutter ones belong to the traditional dam,and hydraulic lifting dam belongs to the third generation.The advantages and disadvantages of traditional dam are obvious,and the shortcomings are far greater than the advantages in the long run,while the hydraulic dam is widely used in domestic branch rivers and urban water inlet and outlet projects,so its development is more competitive.In 2006,the hydraulic lifting dam with dual functions of water retaining and discharging came out.Thanks to its scientific stress structure,when the upstream floating objects drift to the front of the hydraulic dam,they are more likely to be washed across the dam,and the hydraulic dam can be quickly lowered,which will not hinder the rapid flow of water and avoid silt deposition,thus not affecting the flood control safety.In addition,the support rod mechanism in the hydraulic dam has a stronger ability to resist the impact of river water.At present,the academic research on hydraulic dam is not enough.The design of the supporting rods of hydraulic dam is far from meeting the ideal requirements,the synchronization of hydraulic dam lifting adjustment is relatively of inferior quality,and its control has not reached the accurate and energy-saving state.Therefore,in view of the defects of the hydraulic dam,this paper designs the new supporting rod mechanism for the hydraulic dam.It can not only help the hydraulic dam reach the best stress mode and reduce the stress of the hydraulic support cylinder,but also design the synchronous hydraulic control system to better ensure the synchronous lifting of the hydraulic dam,optimize the hydraulic control system of the hydraulic dam and improve the performance of the hydraulic control system of the hydraulic dam.The main research contents are as follows:(1)The overall structure design of the hydraulic dam is carried out by observing the height of the hydraulic head when the hydraulic dam blocks water,the height of the hydraulic dam surface,the stress on the hydraulic dam and the structures that supports these stress and on the basis of Ansys's stress analysis of the structure.(2)The scheme of hydraulic dam control system is designed.The control schematic diagram of the hydraulic dam is designed,and the component selection and detailed calculation for the hydraulic dam are carried out.Because the hydraulic dam system is a multi-cylinder system and ensuring the synchronization of the hydraulic cylinders is the top priority of the control system,so the design of multi-cylinder force servo system becomes the key.During the process,the performance of the hydraulic system is checked,the scheme of the hydraulic control system verified,and AMESim is used to simulate and analyze the system.(3)The model of hydraulic control system of hydraulic dam is established.According to the flow equation of the servo valve,the continuous equation of the supporting rod hydraulic cylinder and the stress equation of the piston rod,the mathematical model of the hydraulic control system of the hydraulic lifting dam is established,its static performance is analyzed,and the mathematical model is optimized.(4)The adaptive control method of hydraulic control system of hydraulic lifting dam is studied.The fuzzy self-adaptive PID control algorithm is applied to the hydraulic control system of the hydraulic lifting dam.The self-adaptive control algorithm of the hydraulic dam control system is put forward.The simulation and experiments show that the system has the characteristics of fast response speed and strong stability after using the self-adaptive control algorithm.Compared with the PID algorithm,the fuzzy self-adaptive is more suitable for the hydraulic system of the hydraulic dam.(5)The performance of hydraulic control system of hydraulic dam is verified.The simulant test platform of the hydraulic control system of the hydraulic dam is established,and the test results show that the hydraulic dam meets the actual requirements.The achievements and innovations of this paper are as follows:(1)Design of overall structure of hydraulic dam.In this paper,the whole structure of the hydraulic dam is designed completely,especially the design of the dam surface and the supporting rod system.The former is designed as an arc shape,which is easy to realize the function of blocking and releasing water.The supporting rod of the hydraulic dam is designed as a four-bar structure to avoid the pressure of the dam face being concentrated on the hydraulic cylinder.In addition,on the basis of the supporting rod,an auxiliary supporting rod system is proposed to protect other mechanisms of the hydraulic dam and extend the service life of the hydraulic dam.(2)Design of synchronous hydraulic control circuit for hydraulic dam.In order to ensure the synchronism of the supporting rod of the hydraulic dam,the synchronism control circuit of the supporting rod of the hydraulic dam is designed according to the principle of the hydraulic servo control.(3)An adaptive control algorithm for hydraulic control system of hydraulic dam is proposed.The adaptive control algorithm of the hydraulic dam control system is designed by using the intelligent control principle.After using the adaptive algorithm,the response speed of the hydraulic dam control system is faster than the original system,and the optimized hydraulic dam control system has stronger anti-interference ability.