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1. (WO2017155827) POSITIVE DISPLACEMENT DEVICE

Pub. No.:    WO/2017/155827    International Application No.:    PCT/US2017/020768
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: F02B 33/38
F01C 19/08
F02B 39/04
Applicants: EATON INTELLIGENT POWER LIMITED
Inventors: FORTINI, Matthew James
YERRABOTHU, Shravani
PATIL, Veerangowda Shivalingreddy
PONKSHE, Tapan Vasant
Title: POSITIVE DISPLACEMENT DEVICE
Abstract:
The proposed design involves making the leakage paths as treacherous and long as possible by incorporating labyrinth seal structures in addition to turbo rings which will significantly reduce the pressure subjected to the turbo rings and reduce potential for cross talk. Moreover, the disclosed designs subject a back pressure onto the cavities which will help with sealing by providing flow path resistance. The proposed design also includes a positive displacement device supported by at least one pair of journal bearings, and preferably two pairs of journal bearings. The teachings herein show that such a design significantly improves efficiency and power generation over devices that utilize ball bearings for rotor shaft support. Additionally, the present teachings show that engine oil forced lubrication flow, temperature, and feed pressure are critical for proper functioning of the journal bearings and to obtain optimal flow rates and feed pressure values for different applications.