Oil separator

Patent metadata

Field	Value
Publication number	US-9810116-B2
Application number	US-201514841604-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Nov 13, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

An oil separator includes a housing into which mixed gas in which unburned gas and engine oil are mixed with each other is introduced from a crank case; a centrifuge mounted in the housing and generating centrifugal force to the mixed gas to thereby separate the engine oil from the mixed gas; and a filter separator mounted in the housing and filtering the engine oil in the mixed gas. Since the engine oil is primarily separated through the centrifuge and secondarily separated through the filter separator, engine oil separation efficiency is improved as compared to the related art, and the same amount of gas may be treated even with a small size as compared to the related art.

First claim

What is claimed is:

1. An oil separator comprising:
a housing into which mixed gas of unburned gas and engine oil is introduced from a crank case;
a centrifuge mounted in the housing and generating centrifugal force to the mixed gas to thereby separate the engine oil from the mixed gas; and
a filter separator mounted in the housing and filtering the engine oil in the mixed gas,
wherein the centrifuge includes an induction rib formed in the housing so as to induce the mixed gas toward an inner side wall surface of the housing, and
wherein the induction rib includes:
a straight rib extending from an introduction pipe attached to the housing toward the inner side wall surface of the housing; and
a curved rib extending from the straight rib so as to be curved to thereby form a spiral shape together with the straight rib.

2. The oil separator according to claim 1 , wherein the housing includes:
a separation function part in which the centrifuge and the filter separator are mounted; and
a discharge part discharging the unburned gas separated from the mixed gas.

3. The oil separator according to claim 2 , wherein the separation function part has a cylindrical shape and includes:
an introduction pipe attached to a side surface of the separation function part so that the mixed gas is introduced;
an oil discharge pipe attached to a bottom surface of the separation function part so that the engine oil separated from the mixed gas is discharged; and
a flow guide inducing the unburned gas separated from the mixed gas to the discharge part and protruding toward the inside of the separation function part.

4. The oil separator according to claim 2 , wherein the discharge part has a box shape in which an upper surface thereof is opened and includes:
a curved path extending from a flow guide formed in the separation function part toward the upper surface of the discharge part;
a gas discharge pipe having one end protruding from a side surface of the discharge part, the one end connected to the curved path; and
a diaphragm positioned on the upper surface of the discharge part so as to allow the curved path and the gas discharge pipe to be in communication with each other or be blocked from each other.

5. The oil separator according to claim 4 , wherein the discharge part further includes a cap fastened to the opened upper surface so as to fix a position of the diaphragm.

6. The oil separator according to claim 1 , wherein the induction rib further includes a through hole formed to penetrate therethrough in a width direction of the induction rib so that the engine oil separated from the mixed gas is moved to an oil discharge pipe provided in the housing by friction with the inner side wall surface of the housing.

7. The oil separator according to claim 1 , wherein the filter separator includes:
a cover plate body having an edge connected to an inner side wall surface of the housing; and
a plurality of fine through holes formed in the cover plate body.

8. The oil separator according to claim 7 , wherein the cover plate body includes a central part protruding in a truncated cone shape,
the central part being non-parallel to the inner side wall surface, and the edge extending while being curved to thereby be parallel with the inner side wall surface.

9. An oil separator comprising:
a housing into which mixed gas in which unburned gas and engine oil are mixed with each other is introduced into a side surface;
a centrifuge provided in the housing so as to generate centrifugal force to the mixed gas to primarily separate the engine oil;
a filter separator provided in the housing so as to be positioned on an upper end of the centrifuge and secondarily separating the engine oil from the mixed gas from which the engine oil is primarily separated; and
a diaphragm provided in the housing so as to open and close a gas discharge pipe discharging the mixed gas from which the engine oil is separated through the centrifuge and the filter separator to the outside of the housing,
wherein the centrifuge includes an induction rib formed in the housing so as to induce the mixed gas toward an inner side wall surface of the housing, and
wherein the induction rib includes:
a straight rib extending from an introduction pipe attached to the housing toward the inner side wall surface of the housing; and
a curved rib extending from the straight rib so as to be curved to thereby form a spiral shape together with the straight rib.

10. The oil separator according to claim 9 , wherein the housing includes an oil discharge pipe discharging the engine oil from the housing to an oil pan provided in an engine, and the gas discharge pipe is connected to an intake manifold.

11. An oil separator comprising:
an oil discharge pipe extending along a first direction;
a gas discharge pipe extending along a second direction different to the first direction;
a separation chamber, extending along the first direction, including a first through hole connected to the oil discharge pipe and a second through hole connected to the gas discharge pipe;
an introduction pipe protruding from a side wall of the separation chamber;
a centrifuge disposed in the separation chamber and including a plurality of ribs protruding from a bottom wall in which the first through hole is formed; and
a filter including a plurality of fine through holes and disposed between the centrifuge and the second through hole.

12. The oil separator according to claim 11 , further comprising a curved flow path connected between the second through hole of the separation chamber and the gas discharge pipe.

13. The oil separator according to claim 12 , further comprising a movable diaphragm positioned between the gas discharge pipe and the curved flow path and selectively opening and closing a flow path between the curved flow path and the gas discharge pipe.

14. The oil separator according to claim 13 , further comprising a cap fixing a position of the movable diaphragm.

15. The oil separator according to claim 11 , further comprising a flow guide protruding from an edge of the second through hole of the separation chamber toward the filter.

16. The oil separator according to claim 11 , wherein:
the plurality of ribs at least include a straight rib extending from the side wall of the separation chamber from which the introduction pipe protrudes, and a curved rib extending from the straight rib and forming a spiral shape together with the straight rib, and
the first through hole of the separation chamber is surrounded by the plurality of ribs.

17. The oil separator according to claim 11 , wherein the filter includes:
a cover plate body having an edge connected to the side wall of the separation chamber and a central part having a truncated cone shape; and
the plurality of fine through holes penetrating through the cover plate body along directions intersecting the side wall of the separation chamber.

18. The oil separator according to claim 11 , wherein the introduction pipe protrudes from a portion of the side wall which is closer to the first through hole than the second through hole of the separation chamber.

Assignees

• Hyundai Motor Co Ltd

Inventors

• An Deog Byoung

Classifications

• B01D45/08

  by impingement against baffle separators · CPC title

• F01M2013/0427

  the centrifuge device having no rotating part, e.g. cyclone · CPC title

• F01M2013/0422

  Separating oil and gas with a centrifuge device · CPC title

• F01M13/04 Primary

  having means for purifying air before leaving crankcase, e.g. removing oil · CPC title

• B01D45/16

  generated by the winding course of the gas stream {, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes} · CPC title