Strelnikov V. Creation highly loaded mechanical transfers with flexible parts for reducers of heavy mechanical engineering

Українська версія

Thesis for the degree of Doctor of Science (DSc)

State registration number

0507U000335

Thesis Registration Form

0507U000335.pdf

Applicant for

Specialization

  • 05.02.02 - Машинознавство

12-04-2007

Specialized Academic Board

Д 29.051.03

Volodymyr Dahl East Ukrainian National University

Essay

Among the great variety of scientific and technical tasks being solved one of the most urgent is to increase the load-carrying capacity and longevity of the mechanical drive and to decrease its overall dimensions and weight characteristics. Traditional designs of gearings in many aspects have exhausted their functional potentialities. In heavy engineering industry the unit weights of reduction gears have been increased up to the tens and hundreds tonnes thus limiting further increase in the machines performance and complicating their configuration and transportability. In order to increase the load-carrying capacity of transmission mechanisms the multiflow circuits are used including the ones with flexible links the elas-tic deformations of which simplify the technique of the force flows differentiation. The loads on the teeth are many-fold decreased, limitations on the seizure, bending and contact stresses criteria eliminated, overall dimensions and specific quantity of metal minimized. The paper presents the results of the development of the new variety of heavy-loaded gearings with flexible links for heavy-duty machines based on the investigation of the engagement geometry, ki-nematic and force analysis, determination of stressed and strained state of load-carrying elements. A new theory of engagement of gearings with intermediate rolling elements has been developed. Established have been zones of teeth interference in the wave gearing. A number of ingenious tasks of the theory of elasticity have been solved. The stressed and strained state has been defined for the flexible gear, wave generator disks, circular-arc teeth. The contact problem has been solved for the near-shape curvature elements: thin wall cylinder with concave surfaces of teeth. Specified have been the efficiencies of gearings under investigation and recommendations on their improvement have been worked out. The results of the investigations have been implemented at a number of enterprises.

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