Design And Research On The Water Hydraulic Drive System For Neutron Beam Shutter

China Spallation Neutron Source(CSNS)is the key construction of major scientific research infrastructure in China during "the eleventh five-year plan".The neutron beam shutter system is one of the key equipment in the CSNS project.In this paper,according to stability of low speed and high reliability requirements,we designed and manufactured the water hydraulic system for neutron beam shutter based on the water hydraulic technology.The test results showed that the system meets the design requirements and has high safety and reliability.The water hydraulic technology successfully applied in the field of neutron radiation in China.The main contents of this paper are as follows:In chapter 1,the development of the spallation neutron source was summarized.The foreign research status of the neutron beam shutter system was introduced.The main research content of this subject was proposed.In chapter 2,based on the preliminary design and failure impact analysis of the water hydraulic drive system for the neutron beam shutter,five reliability design methods were adopted in the optimization of the water hydraulic drive system.The speed control circuits of proportional valve control and throttle valve control were comparatively analyzed through simulation.The principles of the water hydraulic cylinder and the pump station were determined.The final water hydraulic drive system was proposed based on the reliability design results.In chapter 3,according to the reliability design results,the design of the water hydraulic pump station was discussed in detail and the characteristic of water hydraulic drive system was analyzed through simulation.The structure of the specially designed cylinder was studied combined with the characteristics of the drive mechanism and the reliability design result.The test for this cylinder was carried out on the water hydraulic cylinder performance test platformIn chapter 4,a PLC-based control system was designed.The functional composition and control process of its subsystem were introduced.The logical design of the control system for the lift system was conducted,also its control process and reliability were analyzed.EPICS-based human-computer interaction system has been developed to provide users a simple and intuitive user interface and test the control program.In chapter 5,the tests on the system were carried out according to function realization and safety requirements.The test items composed of action test,safety test and stability test were analyzed in details.In chapter 6,all the research contents were summarized,and some new views were put forward in the future.