US 12,012,966 B2
Vaneless contra-rotating compressor with multiple contra-rotating interfaces
Weiwei Cui, Qingdao (CN); Kai Zhang, Qingdao (CN); Fei Yao, Qingdao (CN); Xinglu Wang, Qingdao (CN); Cuiping Wang, Qingdao (CN); and Laishun Yang, Qingdao (CN)
Assigned to SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao (CN)
Filed by SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Qingdao (CN)
Filed on Dec. 13, 2022, as Appl. No. 18/065,359.
Claims priority of application No. 202111536523.4 (CN), filed on Dec. 15, 2021.
Prior Publication US 2023/0287890 A1, Sep. 14, 2023
Int. Cl. F04D 19/02 (2006.01); F04D 29/32 (2006.01)
CPC F04D 19/024 (2013.01) [F04D 29/324 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A vaneless contra-rotating compressor with multiple contra-rotating interfaces, comprising:
at least two vaneless contra-rotating interfaces, and vaneless contra-rotating rotors, wherein for each of the at least two contra-rotating interfaces, the contra-rotating interface corresponds to two of vaneless contra-rotating rotors,
a rotating direction of an upstream rotor of the two vaneless contra-rotating rotors and a rotating direction of a downstream rotor of the two vaneless contra-rotating rotors are opposite; a stator vane is not provided between the upstream rotor and the downstream rotor to supply sufficient inlet negative pre-swirl for the downstream rotor through the upstream rotor, such that a relative inlet velocity and pressurization potential of the downstream rotor is improved; and only outlet guide vanes of one, at a last stage, of the vaneless contra-rotating rotors are provided to rectify final outlet airflow in an axial direction of the outlet guide vanes;
wherein a rotor blade disc of one, at each stage, of the vaneless contra-rotating rotors is driven by a single transmission shaft or double transmission shafts, and an end of one of the double transmission shafts and an end of an other one of the double transmission shafts are arranged oppositely;
wherein a contra-rotating direction and a rotating speed value of the rotor blade disc are adjusted by planetary transmission gears with different sizes and transmission ratios;
wherein rotating speeds of ones of the vaneless contra-rotating rotors which are in a same rotating direction are set to be different by adjusting a transmission ratio of the planetary transmission gears corresponding to one rotor, at each stage, of the vaneless contra-rotating rotors;
wherein a rotation of the single transmission shaft or a rotation of the double transmission shafts are transmitted to a rotating shaft of one, at a corresponding stage, of the vaneless contra-rotating rotors through a main transmission shaft, so as to drive the rotor blade disc to rotate to compress gas, the rotating direction and the rotating speed value of the rotor blade disc are adjusted by the planetary transmission gears corresponding to one rotor, at each stage, of the vaneless contra-rotating rotors; and a transmission ratio of the planetary transmission gears corresponding to the one rotor, at each stage, of the vaneless contra-rotating rotors is set according to actual requirements of the rotating speed of the one rotor, so as to obtain expected rotating speed and stage load of the one rotor.