The kinetic characteristics were analyzed and the calculating equations of absolute and relative velocities were derived for internal-meshing rotary compressors. Moreover
based on the analyzing method of inter-meshing cycloid gears
the friction efficiency was applied to obtain the calculating method of the meshing efficiency. The result shows that the meshing efficiency is related to not only the structural parameters of the rotor profiles
but also the contact forces between meshing points
which is quite different from that of the inter-meshing cycloid gear. It appears that the meshing efficiency can not be obtained until the force distributions are determined.
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references
从庄远,董国华,查森.活塞泵及其它类型泵[M]. 北京:机械工业出版社,1962.
Mitarai M, Kobayashi A. Internal gear type rotary pump having a relief groove: US, 5711660[P]. 1998-01-27.