Marine Diesel Engine Cylinder Head Low Pressure Inspection Station Structure Design And Research

With the rapid expansion of the global shipping market,enterprises producing marine diesel engines need to urgently improve production efficiency and reliability while maintaining the quality of diesel engines.Traditional marine diesel engine cylinder head cooling water circuit leakage detection equipment mainly relies on manual operation,resulting in low efficiency of detection and difficult to ensure the accuracy of detection data.These testing equipment requires manual transport,clamping and testing cylinder head operations,which can no longer meet the needs of modern enterprises for efficient production.Therefore,modern enterprises need to adopt more advanced testing equipment and methods to improve the efficiency and accuracy of testing.This can effectively reduce the production cost and improve the quality of products,so as to achieve a greater advantage in the market competition.In such a context this paper proposes a cooling water circuit leak detection station(The following is referred to as low pressure detection station,that is,the pressure drop method to detect the cylinder head cooling water,the medium is 1MPa water)that combines clamping,transportation and detection in one multifunctional unit,aiming to improve the efficiency and accuracy of detection.The specific contents of the paper include:(1)Reviewing relevant literature at home and abroad to determine design ideas by drawing on previous relevant experience,analyzing design requirements and workflow,designing the overall scheme,and reasonably splitting each function of the testing station into a transport input device,a clamping device,a test pressure testing device,and a transport output device.Analyze and compare the motion schemes of the transmission device and the clamping device to select the optimal motion scheme,and consult relevant literature to determine the most suitable testing scheme.(2)Calculate and design the structure of each device,and calculate and select the required external parts.Using three-dimensional modeling software to establish a three-dimensional model of the components,using the software’s assembly function to assemble the components,and finally the devices in accordance with the designed layout of the total assembly,to complete the overall three-dimensional model of the testing station.(3)Analyze the principle of leak detection using the pressure drop method,and use the fluid analysis software to verify the feasibility of the pressure drop method to detect the leakage of the cooling water circuit of the cylinder head and determine the pressure holding time for the detection.Using the software’s fluid-solid coupling analysis function,verify whether the sealing device can achieve the desired sealing effect.To give the evaluation index for the subsequent use of the test pressure testing device,to help subsequent users to more comprehensively recognize and evaluate the performance characteristics of the test pressure testing device.(4)Static analysis of the key components of the testing station to verify whether their stiffness and strength meet the design requirements,the use of topology optimization and parametric analysis methods to further reduce unnecessary structural elements in the parts to reduce costs and component quality,the structure of possible resonance modal analysis to avoid resonance of the device.(5)The dynamics analysis software Recur Dyn is used to simulate and analyze whether the motion of each device can meet the design requirements,and to verify whether the selection of each device drive part is reasonable.The joint simulation of Recur Dyn and Co Link is used to analyze whether the positioning accuracy of the clamping device can meet the design requirements when clamping the cylinder head.