Vaneless contra-rotating compressor with multiple contra-rotating interfaces

Patent metadata

Field	Value
Publication number	US-12012966-B2
Application number	US-202218065359-A
Country	US
Kind code	B2
Filing date	Dec 13, 2022
Priority date	Dec 15, 2021
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

A vaneless contra-rotating compressor with multiple contra-rotating interfaces and application of the vaneless contra-rotating compressor is provided, which includes at least two vaneless contra-rotating interfaces. 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. Rectifier stator vanes are not provided among all the rotors to supply sufficient inlet negative pre-swirl for the downstream rotors through the upstream rotors. Only the outlet guide vanes of the last stage, of the vaneless contra-rotating rotors are provided. The number of stages and the number of vaneless contra-rotating interfaces may be set flexibly according to the actual pressurization requirements.

First claim

What is claimed is:

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.

2. The vaneless contra-rotating compressor with multiple contra-rotating interfaces according to claim 1 , wherein a fixed support is a total supporting platform for the rotor blade disc of one, at each stage, of the vaneless contra-rotating rotors, and the rotor blade disc is supported by two load-carrying bearings.

Assignees

• Univ Shandong Science & Tech

Inventors

• Cui Weiwei
• Zhang Kai
• Yao Fei
• Wang Xinglu
• Wang Cuiping
• Yang Laishun

Classifications

• F04D29/324

  Blades · CPC title

• F04D25/028

  the driving means being a planetary gear · CPC title

• F04D19/024 Primary

  with contrarotating parts · CPC title