Design On Structure Of Double Rotary Valve Engine Cylinder Cap

The performance of the engine valve system has an obvious influence on the overall performance of the engine.It is directly related to the power performance,economy,reliability,stability and emission characteristics of the engine.However,there are many problems in the traditional valve system,such as more parts,complex structure,Larger vibration,greater manpower and material costs,etc.Therefore,the development of a new Double Rotary Valve Engine Valve System that can solve all the problems has become the first task.In this paper,the structure design of the Double Rotary Valve Engine Cylinder Cap is carried out.The main work of this paper is the structure design of the engine cylinder cap,the calculation of air exchange capacity,the simulation analysis of the rotating valve shaft,and the bench test,the specific contents are follows:(1)The structural form of engine valve system is summarized.The problems existing in the valve system of the traditional valve engine are analyzed.In view of these problems decided to design a double rotary valve system.According to the design requirements,the size parameters,quality parameters and performance parameters are determined.(2)The structure design of Double Rotary Valve Engine Cylinder Cap is carried out.According to the design requirements,planning all parts of the cylinder head,and completed the structural design of all parts.Including cylinder cap body,rotating valve shaft,cooling water channel,sealing system and lubrication system.We also designed the valve timing parameters and timing transmission system for the new cylinder cap.(3)The mechanical properties of the rotating valve shaft and cylinder cap are analyzed.Finite element analysis of intake and exhaust valve shaft by ANSYS software.Finite Element Model of Rotating Valve Shaft in ANSYS Workbench.Simulation analysis of actual working environment of rotary valve engine.(4)Carried out the engine bench test.A set of engine bench system for prototype engine is designed and built.(5)At last,the process rules of the new cylinder head are formulated.After the completion of all modeling work,according to the structure of the double rotary valve cylinder cap and the existing processing technology,the machining process was developed,and the metal 3D printing of all parts of the cylinder cap was completed.