Multiple stage rotating coalescer devices
Disclosed are multiple stage rotating coalescer devices comprising a first stage and a second stage. The first stage may include a rotating coalescing element comprising coalescing media. The second stage is positioned either upstream or downstream or the first stage. The second stage may include one of: (i) a rotating cone stack separator, or (ii) a separate rotating coalescing element comprising coalescing media.
1. A multiple stage rotating coalescer device comprising:
a first stage comprising a rotating coalescing element comprising coalescing media, the rotating coalescing element comprising an endplate sealing a clean side of the coalescing media from a dirty side of the coalescing media;
a second stage, either upstream or downstream of the first stage, comprising
a rotating cone stack separator; and
a de-swirler positioned downstream of the first stage and the second stage, the endplate fitted with the de-swirler on an opposite side of the endplate from the coalescing media.
2. The device of claim 1 , configured such that flow through the first stage is inside-out and flow through the second stage is inside-out.
3. The device of claim 1 , configured such that flow through the first stage is inside-out and flow through the second stage is outside-in.
4. The device of claim 1 , wherein the coalescing media is embedded in cone stacks of the cone stack separator.
5. The device of claim 1 , wherein the cone stack separator is downstream of the coalescing element and flow through the cone stack separator is inside-out.
6. The device of claim 1 , wherein the de-swirler includes a plurality of vanes that deflect a rotating flow of air in an opposite direction of a rotation of the rotating flow of air prior to the air exiting the device.
7. The device of claim 1 , wherein the cone stack separator is upstream of the coalescing element.
8. The device of claim 7 , further comprising a shroud in between the cone stack separator and the coalescing element for collecting fluid from the cone stack separator.
9. The device of claim 8 , further comprising a drain hole for draining fluid collected on the shroud.
10. The device of claim 8 , wherein the cone stacks include slots or holes that allow fluid to drain through the cone stacks.
11. A rotating coalescer system comprising:
a housing having an inlet configured to receive blow-by gas from a crankcase of an internal combustion engine and an outlet configured to output filtered air;
a rotating coalescer positioned within the housing, the rotating coalescer including:
a first endplate,
a second endplate,
a spiral vane preseparator positioned between the first endplate and the second endplate, the spiral vane preseparator including a plurality of curved vanes that cause separation of an oil from the blow-by gas and pumping of the blow-by gas when the spiral vane preseparator is rotating,
a coalescer element circumferentially surrounding the spiral vane preseparator and positioned between the first endplate and the second endplate, the coalescer element comprising coalescer media, and
a de-swirler coupled to the first endplate opposite the spiral vane preseparator and the coalescer element.
12. The system of claim 11 , further comprising an oleophobic screen coupled to the second endplate and circumscribing the spiral vane preseparator.
13. The system of claim 12 , wherein the oleophobic screen contacts the coalescer element.
14. The system of claim 11 , further comprising a shroud coupled to the first endplate and positioned between the spiral vane preseparator and the coalescer element.
15. The system of claim 11 , wherein the de-swirler includes a plurality of de-swirling vanes curved in an opposite direction of the plurality of vanes of the spiral vane preseparator.