Experimental Study of Motion-Resistance Force of Hydraulic Cylinder of CRHDM

2018 ◽  
Author(s):  
Qianfeng Liu ◽  
Yuzheng Li ◽  
Huang Zhang ◽  
Bo Hanliang
Keyword(s):  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Resistance Force ◽  
Coupling Scheme ◽  
Seal Ring ◽  
Hydraulic Control ◽  
Control Rod ◽  
Design And Optimization ◽  
Motion Resistance ◽  
New Energy

Hydraulic control rod drive technology (HCRDT) is a newly invented patent owned by Institute of Nuclear and New Energy Technology of Tsinghua University with independent intellectual property rights. Hydraulic cylinder is the core part of this technology, so the seal of hydraulic cylinder directly affects the performance of the hydraulic cylinder and HCRDT. A new experiment table was designed and used to study the leakage and internal cylinder friction at various types of friction coupling between internal cylinder and seal ring. The result shows that Motion-Resistance Force is the smallest when the internal cylinder film is TiN. Furthermore, when seal ring film is DLC (Diamond-like carbon) the leakage is the smallest. At last, the best friction coupling scheme was obtained. The experimental results provide the basis for the establishment of the motion model of hydraulic cylinder, which provides a foundation for further design and optimization of hydraulic drive technology of control rod.

Theoretical Analysis of Step-Down of Hydraulic Cylinder Motion for Control Rod Hydraulic Drive System Based on Model II

2017 ◽  
Author(s):  
Qianfeng Liu ◽  
Yuzheng Li ◽  
Benke Qin ◽  
Bo Hanliang
Keyword(s):  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Energy Technology ◽  
Hydraulic Control ◽  
Transient Pressure ◽  
Control Rod ◽  
Tsinghua University ◽  
Motion Time ◽  
New Energy ◽  
Step Down

Hydraulic Control Rod Drive Technology (HCRDT) is a newly invented patent and Institute of Nuclear and New Energy Technology Tsinghua University own HCRDT’s independent intellectual property rights. The hydraulic cylinder is the key part of this technology, so the performance of the hydraulic cylinder directly affects the HCRDT. Firstly, the theoretical model of the cylinder hydraulic has been obtained and verified by the experiment. Second, the step-down process of the cylinder hydraulic is analyzed. The results are shown that the model can analyze the performance of the cylinder, including the motion time of the cylinder, the transient pressure of the cylinder arrival, the transient impact energy of the cylinder arrival. At last, the cylinder and the drive mechanism can be optimized based on the result.

Experimental Study and Analysis of the Deformable Pipe of CRHDM

2018 ◽  
Author(s):  
Yuzheng Li ◽  
Huang Zhang ◽  
Qianfeng Liu ◽  
Bo Hanliang
Keyword(s):  
Experimental Study ◽  
Intellectual Property Rights ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Energy Technology ◽  
Hydraulic Control ◽  
Control Rod ◽  
Tsinghua University ◽  
System A ◽  
New Energy

Hydraulic Control Rod Drive Technology (HCRDT) is a newly invented patent owned by Institute of Nuclear and New Energy Technology Tsinghua University with independent intellectual property rights. The hydraulic cylinder which is connected by the deformable pipe is the key part of this technology, so the performance of the deformable pipe directly affects the function of the hydraulic cylinder and the HCRDT. Based on the conditions occurring in the operation of the Control Rod Hydraulic Drive System, a kind of new deformable pipe is designed and has been tested by the experiment and analyzed by ANSYS. The result shows that the longer deformable pipe is the longer its lifetime is firstly. Second, lifetime of the deformable pipe which has net is longer. Furthermore, the design of HCRDT can be optimized.

Thermal Analysis of the Head of the Direct Action Solenoid Valve

2013 ◽  
Author(s):  
Qian-feng Liu ◽  
Han-liang Bo
Keyword(s):  
Direct Action ◽  
Hydraulic Drive ◽  
Thermal Characteristics ◽  
Solenoid Valve ◽  
Energy Technology ◽  
Hydraulic Control ◽  
Control Rod ◽  
Tsinghua University ◽  
Coefficient Of Thermal Conductivity ◽  
New Energy

Hydraulic Control Rod Drive Technology (HCRDT) is a newly invented patent and Institute of Nuclear and New Energy Technology Tsinghua University owns HCRDT’s independent intellectual property rights. The Integrated valve which is made up of three direct action solenoid valves is the key part of this technology, so the performance of the solenoid valve directly affects the function of the integrated valve and the HCRDT. On one hand, based on the conditions occurring in the operation of the Control Rod Hydraulic Drive System, the thermal characteristics of the head of the valve are analyzed by ANSYS. On the other hand, the numerical results are verified by the experiment. The results show that the temperature of the head of the solenoid valve increases with the current increasing firstly. Second, the highest temperature of the head is obtained so the current can be selected. Third, the coefficient of thermal conductivity of the head of the valve is obtained, which can be applied to other analysis of the solenoid valve.

Numerical Simulation of the Head of the Direct Action Solenoid Valve Under the High Temperature Condition

2016 ◽  
Author(s):  
Qianfeng Liu ◽  
FuLong Zhao ◽  
Hanliang Bo
Keyword(s):  
High Temperature ◽  
Thermal Field ◽  
Direct Action ◽  
Hydraulic Drive ◽  
Decomposition Temperature ◽  
Solenoid Valve ◽  
Hydraulic Control ◽  
Control Rod ◽  
New Energy ◽  
High Temperature Condition

This solenoid valve is used in the Hydraulic Control Rod Drive Technology (HCRDT). The Technology is a newly invented patent and the Institute of Nuclear and New Energy Technology Tsinghua University owns HCRDT’s independent intellectual property rights. The Integrated valve which is made up of three direct action solenoid valves is the key part of this technology, so the performance of the solenoid valve directly affects the function of the integrated valve and the HCRDT. On one hand, based on the conditions occurring in the operation of the Control Rod Hydraulic Drive System, the thermal field of the head is analyzed by ANSYS. The result shows that the highest temperature is below the decomposition temperature of the coil. Second, the performance of the head is obtained in the high temperature. Third, a method is presented to monitor the performance of the valve while the reactor is working. On the other hand, the head of the direct action solenoid valve in high temperature is studied by the experiment. In a word, the solenoid valve has a good performance under high temperature condition.

Analysis of Flow Resistance Influence on Step-Down Process of the Control Rod Hydraulic Drive System

2021 ◽  
Author(s):  
Linqing Yang ◽  
Benke Qin ◽  
Hanliang Bo
Keyword(s):  
Theoretical Model ◽  
Flow Resistance ◽  
Inflection Point ◽  
Great Influence ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Drive System ◽  
Pressure Curve ◽  
Control Rod ◽  
Step Down

Abstract Control rod hydraulic drive system (CRHDS) is a new type of built-in control rod drive technology which is invented by INET, Tsinghua University. The integrated valve (IV) is the main flow control component of the CRHDS. Flow resistance of IV has a great influence on the control rod dynamic step-down process. The step-down performance experiments of CRHDS with different flow resistance of IV were conducted under room temperature conditions. Meanwhile, the theoretical model of hydraulic cylinder step-down process was established and combined with the relationship of the flow resistance of IV under the experimental conditions to get the dynamic response of the hydraulic cylinder. The calculation results of theoretical model agree well with the experimental data. On this basis, the theoretical model of hydraulic cylinder step-down process was applied to the high temperature working conditions with different flow resistance of IV. The analysis results show that at higher working temperature, with the increase of the flow resistance of IV control rod step-down average velocity decreases and step-down time increases correspondingly. There is an inflection point in the transient pressure curve and the pressure of the inflection point decreases gradually with the increase of the flow resistance. The pressure lag time after step-down also decreases. The research results lay the base for the design and optimization of the flow resistance of the IV for the CRHDS.

Dynamic Analysis of Core Magnetic Circuit of Direct Action Solenoid Valve

2010 ◽  
Author(s):  
Qianfeng Liu ◽  
Hanliang Bo ◽  
Benke Qin
Keyword(s):  
Electromagnetic Force ◽  
Magnetic Force ◽  
Magnetic Circuit ◽  
Direct Action ◽  
Hydraulic Drive ◽  
Ring Structure ◽  
Solenoid Valve ◽  
Seal Ring ◽  
Control Rod ◽  
The One

Control rod hydraulic drive mechanism (CRHDM) is a newly invented patent with Institute of Nuclear and New Energy Technology Tsinghua University which owns CRHDM’s independent intellectual property rights. The combined valve which is made up of three direct action solenoid valves is the key part of this technology, so the performance of the solenoid valve directly affects the function of the integrated valve and the CRHDM. The core magnetic circuit of 8 types of the direct action solenoid valve is analyzed using the ANSYS software with various voltages, the results of which are validated by experiments. It shows that the magnetic force increases and time shortens with the increasing voltage. What’s more, under the same condition, the electromagnetic force of the solenoid valve with cone armatures increases much faster than the one of flat armatures, however, the electromagnetic force of the latter is bigger than the former when the force is steady. Furthermore, different shaped interfaces of the seal ring structure between armatures lead to different results. Especially, the electromagnetic force of the solenoid valve with the flat armatures which has seal ring increases faster than the one which does not have this structure, but the result is opposite when it is the solenoid valve with the cone armatures. At last, the subsection structure of magnetic material accelerates the magnetic force sharply.

Deceleration Performance and Parameter Influence Analysis of the Control Rod Hydraulic Deceleration Device for Control Rod Hydraulic Drive System

2019 ◽  
Vol 5 (3) ◽  
Author(s):  
Qin Benke ◽  
Li Leishi ◽  
Bo Hanliang
Keyword(s):  
Internal Control ◽  
Three Dimensional ◽  
Hydraulic Drive ◽  
Drive System ◽  
Field Analysis ◽  
Control Rod ◽  
Design And Optimization ◽  
Main Components ◽  
Technology Control ◽  
The Impact

Control rod hydraulic drive system (CRHDS), which is invented by INET, Tsinghua University, is a new type of internal control rod drive technology. Control rod hydraulic deceleration device (CRHDD), which consists of the plug, the hydraulic deceleration cylinder, etc., is one of the main components of the CRHDS. The CRHDD performs the rod dropping deceleration function through the interworking of the plug and the deceleration cylinder, which is filled with water, and reduces the rod dropping peak acceleration and the impact force acting upon the control rod to prevent the control rod cruciform blade from being deformed or damaged. The working mechanism of the CRHDD is presented and analyzed. The theoretical model of the control rod dropping process, which is based upon force analysis of the control rod during scram process, three-dimensional flow field analysis, and flow resistance calculation of the hydraulic deceleration cylinder, the kinematics and dynamics analysis of the control rod, is built whose results are compared and validated by the CRHDS scram test results. Then the model is used to analyze the influence of the key parameters, including the fuel case gap, the plug design clearance, the working temperature, etc. on the CRHDD working performance. The research results can give guidance for the design and optimization of the CRHDD.

Numerical and Experimental Analysis of the Control Rod Hydraulic Deceleration Device for the Control Rod Hydraulic Drive System

2017 ◽  
Author(s):  
Qin Benke ◽  
Li Leishi ◽  
Bo Hanliang
Keyword(s):  
Internal Control ◽  
Room Temperature ◽  
Three Dimensional ◽  
Hydraulic Drive ◽  
Drive System ◽  
Field Analysis ◽  
Control Rod ◽  
Design And Optimization ◽  
Main Components ◽  
The Impact

Control rod hydraulic drive system (CRHDS), which is invented by INET, Tsinghua University, is a new type of internal control rod drive technology. Control rod hydraulic deceleration device (CRHDD), which consists of the plug, the hydraulic deceleration cylinder, the hydraulic buffer, etc., is one of the main components of the CRHDS. The plug is connected with the top of the control rod driving shaft and moves along with the control rod inside the hydraulic deceleration cylinder. The CRHDD performs the rod dropping deceleration function through the interworking of the plug and the deceleration cylinder which is filled with water, and reduces the rod dropping peak acceleration and the impact force acting upon the control rod to prevent the control rod cruciform blade from being deformed or damaged. The working mechanism of the CRHDD is presented and analyzed. The rod dropping performance of the CRHDS was tested experimentally under room temperature. The theoretical model of the control rod dropping process, which is composed of the three dimensional flow field analysis and flow resistance calculation of the hydraulic deceleration cylinder, the kinematics and dynamics model of the control rod, is built whose results are compared and validated by the CRHDS scram test results under room temperature. Then the model takes into account of the influence of the fuel assembly box on the control rod scram process under high temperature working conditions, and is used to analyze the influence of the key parameters, including the helical spring stiffness inside the deceleration cylinder and the working temperature on the CRHDD working performance. The research results can give guidance for the design and optimization of the CRHDD.

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