Study On Elastic Properties Of Engine Elastic Elements

The spiral retaining ring and expanding ring are important sealing devices in the engine.The sealing performance of the spiral retaining ring and expanding ring affects the overall performance of the engine.Spiral retaining ring and expanding ring through its own elastic force and the pressure of the working medium contact with the body to form a sealing surface to play a sealing role.The structure of the two seals is not axisymmetrical,which leads to the uneven pressure distribution on the sealing surface in the process of work.In the process of use,it is inevitable that there will be wear and not tight sealing resulting in leakage.In this paper,how to improve the sealing performance of spiral retaining ring and expanding ring is studied,and the processing methods and elastic properties are analyzed.The research content of this paper is based on the processing and forming technology of spiral retaining ring and expanding ring.Both of them are non-axisymmetric structure parts requiring special processing methods.In order to get the spiral spring used to make the spiral retaining ring,the rectangular cross section wire was used to simulate the winding,and the mechanical properties of the formed spiral spring were analyzed.In order to make the contact force distribution uniform,the non-circular design of the expanding ring is carried out,and a set of data processing flow of profiling processing is designed.The difference is that the spiral retaining ring has not only the radial rebound,but also the axial and circular rebound.After analyzing the rebound process,it is found that the size of the designed spiral retaining ring is stable,and the sealing effect is better after the rebound.In order to improve the performance of spiral retaining ring and expanding ring,the processing technology was optimized.Based on the problem of spiral retaining ring winding cracking and working wear,the multi-pass rolling finite element analysis of billet was carried out to obtain the deformation strengthening law of billet.Based on the residual stress produced in the process of flange machining problem,design according to eliminate residual stress when using vibration,and change the different process parameters to explore its influence on residual stress relieving effect,finally in order to improve the flange production efficiency,simplifies data processing,design using polynomial function to the flange contour curve fitting.Through the above research,obtained the spiral baffle ring and flange machining method,design of the spiral baffle ring size is relatively stable,and after rolling,the hardening effect can satisfy the spiral baffle ring rigid toughening effect,improve the service life and the design of noncircular flange can meet the design requirements of the contact pressure evenly,sealed performance is improved significantly.This paper is of guiding significance to the development of high performance spiral retainer ring and expansion ring.