US 11,892,010 B2
Combustible gas compressor
Jung Han Lee, Geoje-Si (KR)
Assigned to CLUSTER LNG CO., LTD., Geoje-Si (KR)
Filed by CLUSTER LNG CO., LTD., Geoje-si (KR)
Filed on Dec. 17, 2021, as Appl. No. 17/644,904.
Application 17/644,904 is a continuation of application No. 17/255,243, previously published as PCT/KR2019/007588, filed on Jun. 24, 2019.
Claims priority of application No. 10-2018-0072743 (KR), filed on Jun. 25, 2018.
Prior Publication US 2022/0106967 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 29/42 (2006.01); F04D 25/06 (2006.01); F04D 29/056 (2006.01); F04D 29/10 (2006.01); F04D 29/28 (2006.01)
CPC F04D 29/4206 (2013.01) [F04D 25/0606 (2013.01); F04D 29/056 (2013.01); F04D 29/102 (2013.01); F04D 29/284 (2013.01); F05D 2250/51 (2013.01); F05D 2250/52 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A combustible gas compressor comprising:
a compressor housing;
an impeller disposed in the compressor housing and configured to rotate to compress a combustible gas;
a motor housing;
a motor disposed in the motor housing and configured to drive the impeller disposed in the compressor housing;
a partition wall disposed between the compressor housing and the motor housing;
a rotational shaft connecting the motor and the impeller and configured to transmit rotation driving force of the motor to the impeller; and
a first bearing configured to support the rotational shaft; and
a second bearing configured to support the rotational shaft,
wherein the first bearing and the second bearing are disposed in the motor housing, and the motor is interposed between the first bearing and the second bearing,
wherein the first bearing is spaced from the partition wall and disposed between the partition wall and the motor, the first bearing being configured to lift the rotational shaft such that a bearing gap is formed between the first bearing and the rotational shaft,
wherein the compressor housing and the motor housing are integrally formed and partitioned by the partition wall,
wherein there is a leakage gap between the partition wall and the rotational shaft,
wherein the compressor housing is in fluid communication with the motor housing through the leakage gap between the rotational shaft and the partition wall configured to allow the combustible gas to leak from the compressor housing to the motor housing through the leakage gap between the rotational shaft and the partition wall such that the combustible gas received in the motor housing causes a pressure inside the motor housing to be higher than atmospheric pressure and inhibit external oxygen from flowing into the motor housing.