The Structure Design And Finite Element Analysis Of The Plate And The Z Axis Of The Wobble-plate Diesel Engine

The wobble—plate diesel engine is a new type of engine，the engine has a compactstructure， high power and high power density volume， small vibration， low noisecharacteristics. In2006the United States army’s laboratory trial-manufacture a nutatinggasoline engine. This trial-manufacture engine proves the integrity of the structure andperformance of the engine. The main content of this article is the finite element analysis ofthe plate and the Z axis, on this basis, the engine’s plate and Z axis structural design wasgave.First of all，the article design the basic structure parameters of the plate and Z axis. Theplate need to envelope of the plate movement as the plate do complicated nutational motion.This is an ideal way to eliminate the movement interference between plate and partition. Inthis paper，through the establishment of plate and the Z axis of the three-dimensional entityassembly model，the software was used to simulate the key points kinematics of plate. Theplate and partition material will be removed by analyzing the motion law of the key points tocomplete part of plate structure design.Second，the main task of the plate and the Z axis structure design is the plate movementform and the law of motion research to ensure working process. At the same time in order toguarantee the realization of the function of the engine，the plate and Z axis arrange thecirculation oil and the design of the seal is necessary. The arrangement of cooling oil aboutthe plate should ensure first cooling the plate part under high temperature gas，at the sametime，the amount of circulating oil has been calculated on the plate and Z axis. The platecontact form with cylinder is similar to the rotor engine as the engine motion. This paper determines the plate sealing solutions by comparing the traditional piston engine and the rotorengine sealing.Third，the finite element analysis was carried out on the plate and the Z axis through thestructural parameters of the plate and the Z axis have been known. The article only considersthe Z axis statics analysis under the maximum explosion pressure. Z axis structureoptimization design has been completed through Z axis stress and strain analysis. The staticsanalysis have been carried out on the plate under the maximum explosion pressure, it isconvenient to compare with the plate coupled thermal-mechanical analysis results.Finally，the engine working process knew to obtain the average temperature andaverage heat transfer coefficient. The plate’s each part of temperature and heat transfercoefficient was calculated by comparing with the experience of the piston heat transfercoefficient calculation formula. Then，the plate temperature field distribution obtained.Finally，the plate coupling thermal-mechanical analysis was carried out to complete thestructure optimization design of the plate.In this paper，the structure of the plate and Z axis design and finite element analysis hasfinished. The plate and the Z axis optimization scheme of structure design were determined.The article provides support to the diesel engine prototype trial-manufacture. At the sametime for the plate and the Z axis to weight loss and lightweight design laid the foundation offurther research.