Study On The Agglutination Carrying Capacity Of The Plane-generated Double Enveloping Worm

The plane-generated double enveloping worm gearing is a new kind gearing and has excellent carrying and driving capacity. Compare with the cylindrical worm, it has many characteristic such as having instant double contact line, several teeth mesh at the same time, big normal speed on the contact line and combined radius of curvature, small contact stress and can form dynamic pressure film while meshing. All these make it has the advantage of wide range of transmission ratio, compact structure and gearing smoothly, high efficiency and long useful time and especially fulfill the need of heavy carrying and high speed of modern machinery. The plane-generated double enveloping worm has a brilliant future in the applying of engineering program but the research about its agglutination carrying capacity is still at the questing stage. This thesis research the agglutination carrying capacity of the plane-generated double enveloping worm gearing and is useful to enhance the performance of the plane-generated double enveloping worm gearing.Nowadays, most of the designing and calculation about worm gearing are still about their contact strength and bending strength of their root of tooth in domestic. The mature theory and method and the spatial mesh theory, are used in this thesis to design the way to calculate the agglutination carrying capacity.These contents below is discussed in the thesis.1. Bases on spatial mesh theory, found the spatial mesh model of the plane-generated double enveloping worm, derives its equation of contact line, equation of the tooth surface and the equation of the line of under cut.2. Many ways to calculate the agglutination carrying capacity are discussed and the highest temperature method is used in this thesis. Analyze the shortage of using now-existed highest temperature method to calculate the agglutination carrying capacity. Base on the analysis of lubricating angle, the contact line and the load distribution on it, the relative movement direction of the worm and the worm wheel, the projection on the tangent plane of the absolute velocity of the worm and worm wheel. Deduce the highest temperature calculation formula of the plane-generated double enveloping gearing. Use the abrasion balance equation to calculate the load distribution on the contact line.3. the formula is used to calculate an example and the results are analyzed. Figuring out the distribute discipline of the highest temperature on the worm wheel and analyze the position of the highest temperature appeared. Point out the ways to lower the highest temperature and improve the agglutination carrying capacity.The formula developed in this thesis is easily to used and can fulfill most of the needs in project designing. The production in this thesis are useful for the agglutination carrying capacity calculation of the plane-generated double enveloping worm.