WO2017040256A1 - Rotating coalescing element with directed liquid drainage and gas outlet - Google Patents

Rotating coalescing element with directed liquid drainage and gas outlet Download PDF

Info

Publication number
WO2017040256A1
WO2017040256A1 PCT/US2016/048912 US2016048912W WO2017040256A1 WO 2017040256 A1 WO2017040256 A1 WO 2017040256A1 US 2016048912 W US2016048912 W US 2016048912W WO 2017040256 A1 WO2017040256 A1 WO 2017040256A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating coalescer
rotating
endplate
housing
filtration system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2016/048912
Other languages
French (fr)
Inventor
Brian W. Schwandt
Christopher E. Holm
Chirag D. Parikh
Suryanarayanan PANEERSELVAM
Peter K. Herman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cummins Filtration IP Inc
Original Assignee
Cummins Filtration IP Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Filtration IP Inc filed Critical Cummins Filtration IP Inc
Priority to DE112016003302.8T priority Critical patent/DE112016003302T5/en
Priority to US15/753,778 priority patent/US10682601B2/en
Priority to CN201680048211.XA priority patent/CN107921346B/en
Publication of WO2017040256A1 publication Critical patent/WO2017040256A1/en
Anticipated expiration legal-status Critical
Priority to US16/876,509 priority patent/US11504665B2/en
Priority to US17/965,575 priority patent/US11964224B2/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B01D46/0031—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid with collecting, draining means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0052—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
    • B01D46/0056—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/26—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies rotatable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter

Definitions

  • the present application relates to rotating coalescing elements.
  • blowby gases include a mixture of aerosols, oils, and air. If vented directly to the ambient, the blowby gases can harm the environment. Accordingly, the blowby gases are typically routed out of the crankcase via a crankcase ventilation system.
  • the crankcase ventilation system may pass the blowby gases through a coalescer (i.e., a coalescing filter element) to remove a majority of the aerosols and oils contained in the blowby gases.
  • the coalescer includes filter media.
  • the filtered blowby gases (“clean" gases) are then either vented to the ambient (in open crankcase ventilation systems) or routed back to the air intake for the internal combustion engine for further combustion (in closed crankcase ventilation systems).
  • crankcase ventilation systems utilize rotating coalescers that increase the filter efficiency of the coalescing filter elements by rotating the filter media during filtering.
  • the contaminants e.g., oil droplets suspended and transported by blowby gases
  • the particle capture mechanisms of inertial impaction, interception, diffusion, and gravitational forces onto the fibers By rotating the filter media, inertial impaction and gravitational forces are enhanced by the additional centrifugal force.
  • the rotation of the filter cartridge can create a pumping effect, which reduces the pressure drop through the filtration system.
  • Rotating filter cartridges may include fibrous filters as well as centrifugal separation devices.
  • the filtration system includes a filtration system housing having an inlet and an outlet.
  • a rotating coalescer element is positioned within the filtration system housing and in fluid communication with the inlet and the outlet.
  • the rotating coalescer element is configured to separate a suspended liquid from a fluid received through the inlet.
  • the rotating coalescer element includes a first endplate, a second endplate, and a coalescing device positioned between the first endplate and the second endplate.
  • the rotating coalescer element further includes a rotating coalescer housing extending between and coupled to the first endplate and the second endplate.
  • the rotating coalescer housing is radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device.
  • the rotating coalescer housing includes a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate.
  • the rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
  • the rotating coalescer element is configured to separate a suspended liquid from a fluid.
  • the rotating coalescer element includes a first endplate, a second endplate, and a coalescing device positioned between the first endplate and the second endplate.
  • the rotating coalescer element further includes a rotating coalescer housing extending between and coupled to the first endplate and the second endplate.
  • the rotating coalescer housing is radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device.
  • the rotating coalescer housing includes a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate.
  • the rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
  • FIG. 1 shows a cross-sectional view of a filtration system is shown according to an example embodiment.
  • FIG. 2 shows a cross-sectional view of the rotating filter element of the filtration system of FIG. 1.
  • FIG. 3 shows a perspective view of the rotating filter element of the filtration system of FIG. 1.
  • FIG. 4 shows another perspective view of the rotating filter element of the filtration system of FIG. 1.
  • FIG. 5 shows another cross-sectional view of the rotating filter element of the filtration system of FIG. 1.
  • FIG. 6 is a cross-sectional view of a rotating coalescer element according to an example embodiment.
  • FIG. 7 is a cross-sectional view of a rotating filter element according to another example embodiment.
  • a rotating coalescer having an ejected coalesced liquid separating device is described.
  • the separating device prevents re-entrainment of liquid into a stream of filtered gas.
  • the rotating coalescer includes a rotating filter element or coalescing cone stack positioned within a rotating coalescer housing.
  • the outer surface (i.e., the clean side) of the rotating filter element or the outlet of the coalescing cone stack is displaced from the inner surface of the rotating coalescer housing.
  • the gap between the rotating filter element or the coalescing cone stack and the rotating coalescer housing allows for ejected coalesced liquid, such as oil, to accumulate on the inner surface of the rotating coalescer housing for drainage and allows for filtered gas, such as air, to exit through a clean gas outlet of the rotating coalescer housing.
  • the rotating coalescer housing includes a rib that prevents accumulated liquid from flowing through the clean gas outlet.
  • the inner surface of the rotating coalescer housing is angled to assist with drainage of the accumulated liquid.
  • the filtration system 100 includes a filtration system housing 102 having an inlet 104 and an outlet 106.
  • the filtration system housing 102 is a stationary housing.
  • the inlet 104 receives fluid to be filtered, such as crankcase blowby gases, and the outlet 106 outputs filtered fluid to a system, such as an internal combustion engine (e.g., a diesel internal combustion engine).
  • the filtration system 100 includes a rotating filter element 108.
  • the rotating filter element 108 is a rotating coalescer element.
  • the rotating filter element 108 includes filter media 110.
  • the filter media 110 shown in FIG. 1 is arranged in a cylindrical shape.
  • the filter media 110 is a coalescing fibrous filter media.
  • the rotating filter element 108 includes a first endplate 112 and a second endplate 114.
  • the filter media 110 is positioned between the first endplate 112 and the second endplate 114.
  • the filter media 110 is sealed to the first endplate 112 and the second endplate 114.
  • the rotating filter element 108 further includes a rotating coalescer housing 116.
  • the rotating coalescer housing 116 extends between and is coupled to the first endplate 112 and the second endplate 114.
  • the rotating coalescer housing 116 is radially displaced from an outer surface of the filter media 110.
  • the rotating filter element 108 separates a suspended liquid in the fluid.
  • the rotating filter element 108 separates oils and aerosols suspended in the crankcase blowby gases.
  • the rotating filter element 108 is described in further detail below with respect to FIGS. 2 through 7.
  • the rotating filter element 108 includes a central axis 118. During operation, the rotating filter element 108 rotates about a central axis. Fluid to be filtered enters the filtration system housing 102 through the inlet 104. The fluid flows through the filter media 110 as shown by flow arrows 120 in FIG. 5. As the fluid passes through the filter media 110, liquid droplets dispersed in the fluid are coalesced and separated from the fluid by the filter media 110. Due to the rotation of the rotating filter element 108 and the centrifugal force imparted on the separated liquid, the separated liquid may be ejected from the outlet face of the filter media 110.
  • the inner wall of the rotating coalescer housing 116 is separated from the outlet face of the filter media 110 (e.g., by a distance D).
  • the separation distance D permits the ejected liquid to accumulate along the inner wall of the rotating coalescer housing 116 while still providing space for the filtered fluid to flow out of the rotating filter element 108.
  • the separated liquid may form a film of liquid along the inner wall of the rotating coalescer housing 116.
  • the separated liquid flows to a drain (as designated by the drainage arrow 122).
  • the filtered fluid exits the rotating filter element 108 through a plurality of gas outlets 124 formed between the first endplate 112 and the rotating coalescer housing 116.
  • the accumulated liquid along the inner wall of the rotating coalescer housing 116 exits the rotating filter element 108 through a plurality of liquid outlets 126 formed in the rotating coalescer housing 116 and a plurality of drains 128 formed in the second endplate 114. As shown best in FIG. 3, the liquid outlets 126 are formed near the opposite end of the rotating coalescer housing 116 from the gas outlets 124. As described in further detail below, the rotating coalescer housing 116 includes features that assist in preventing the accumulated fluid from flowing out of the gas outlets 124. In some arrangements, the rotating coalescer housing 116 and the first endplate 112, or at least a portion there of, are formed as a single piece of injection molded thermoplastic.
  • the inner wall of the rotating coalescer housing 116 includes a circumferential ring 130 positioned near the gas outlets 124 of the rotating filter element 108.
  • the circumferential ring 130 prevents the separated liquid from flowing through the gas outlets 124. Due to the rotation of the rotating filter element 108, the film of accumulated liquid that forms along the inner wall of the rotating coalescer housing 116 can only reach a certain thickness.
  • the height of the circumferential ring 130 with respect to the inner wall of the rotating coalescer housing 116 is greater than the maximum thickness of the film of
  • the rotating coalescer housing 116 may be angled at a draft angle a away from the gas outlets 124.
  • the rotating coalescer housing is narrower at the end adjacent to the gas outlets 124 (i.e., the first endplate 112) and wider at the end adjacent to the liquid outlets 126 (i.e., the second endplate 114).
  • the rotating coalescer housing 116 may be slightly conical, convex, or concave in shape.
  • the centrifugal forces on the accumulated liquid will move the accumulated along angled wall of the rotating coalescer housing 116 in an axial direction towards the liquid outlets 126 and away from the gas outlets 124.
  • the centrifugal forces on the accumulated liquid in the axial direction are greater than gravity.
  • the gas outlet 124 and the liquid outlet can be flipped in the direction of gravity (e.g., as shown in FIG. 7).
  • ⁇ is the rotational speed of the rotating filter element 108 during operation and R is the distance between the central axis 118 and the inside of the rotating coalescer housing 116.
  • the height of the circumferential ring 130, the draft angle a, or a combination thereof creates an effective angle greater than tan _1 (l/Gradial) to achieve drainage in the desired direction (i.e., away from the gas outlets 124 and towards the liquid outlets 126.
  • the draft angle 132 is approximately 0.06 degrees.
  • the rotating coalescer housing 116 includes a plurality of support ribs 132 projecting from the inner surface of the rotating coalescer housing 116 to the outlet face of the filter media 110.
  • the support ribs 132 provide support to the flexible fibrous media 110 during rotation of the filter element 108 to prevent excessive deformation of the filter media 110 during high speed rotation.
  • the support ribs 132 may include a number of first through-holes that allow the filtered fluid to pass between the support ribs 132.
  • gas outlets 124 may be positioned between adjacent sets of support ribs 132 and between the outermost support ribs 132 and the first and second endplates 112 and 114.
  • the support ribs 132 include a number of second through-holes that allow the accumulated liquid to pass between the support ribs 132.
  • liquid outlets 126 may be positioned between adjacent sets of support ribs 132 and between the outermost support ribs 132 and the first and second endplates 112 and 114.
  • an axial rib ring extends 134 from the gas outlet end of the rotating coalescer housing 116 adjacent to the filter media 110.
  • the axial rib ring 134 extends into the rotating coalescer housing 116 beyond the axial location of the circumferential ring 130, which prevents accumulated liquid from migrating to the gas outlets 124.
  • the axial rib ring 134 acts as a weir that prevents accumulated liquid exiting the filter media 110 from ejecting directly to the gas outlets 124.
  • FIG. 6 a cross-sectional view of a rotating coalescer element 600 is shown according to an example embodiment.
  • the rotating coalescer element 600 is similar to the rotating filter element 108 of filtration system 100. Accordingly, like numbering is used between the rotating coalescer element 600 of FIG. 6 and the rotating filter element of FIGS. 1 through 5.
  • the only difference between the rotating coalescer element 600 and the rotating filter element 108 is that the rotating coalescer element 600 does not utilize filter media to separate a liquid suspended in the fluid flowing through the rotating coalescer element 600. Rather, the rotating coalescer element 600 utilizes a centrifuge cone stack 602.
  • the centrifuge cone stack 602 includes a plurality of axially spaced centrifuge cones 604.
  • Each of the cones is angled with respect to the radial direction. As the gas passes through the space between each of the axially spaced centrifuge cones 604, the angle of the individual axially spaced centrifuge cones 604 causes an abrupt change in direction of the gas. The abrupt change of direction separates the suspended liquid due to the higher inertia of the liquid as compared to the gas.
  • FIG. 7 shows a cross-sectional view of a rotating filter element 700 according to an example embodiment.
  • the rotating filter element 700 is similar to the rotating filter element 108 of filtration system 100. Accordingly, like numbering is used between the rotating filter element 700 of FIG. 7 and the rotating filter element of FIGS. 1 through 5.
  • the rotating filter element 700 is oriented in the opposite direction with respect to gravity 702 than the rotating filter element 108. Accordingly, the accumulated liquid is drained from the rotating filter element 700 against the force of gravity. The drainage is achieved because the centrifugal force on the accumulated liquid is high enough to overcome the force of gravity.
  • the orientation of the filter element 700 permits a top inlet of the gas-liquid mixture into the device and a bottom clean gas outlet. Such an arrangement may be preferred for certain crankcase ventilation applications in which the source of the aerosol laden blowby gas to be cleaned is above the location of the rotating coalescing device.
  • the above-described rotating coalescer and filter elements may be used in crankcase ventilation systems.
  • the above-described rotating coalescer and filter elements are used in high-speed rotating coalescer arrangements in which the radial g-force at the inner diameter of the rotating coalescer housing 116 is at least 1000 times the force of gravity.
  • rotating coalescer and filter elements provide a number advantages in accordance with various embodiments.
  • the shape of the rotating coalescer housing e.g., the rotating coalescer housing 116
  • separated liquid can be directed to a desired location by harnessing axial and radial components of the centrifugal force created by the rotation. This allows for an unlimited amount of locations for accumulated liquid to be ejected from the rotating coalescer housing. This minimizes or eliminates the risk of accumulated liquid becoming re-entrained into the filtered fluid via the gas outlet.
  • the coalescing element could be operated at any angle, provided that the outlet liquid ejected from the rotating body is captured in an area of the stationary housing which directs the ejected liquid away and does not allow it to recombine with the clean gas outlet.
  • the term "about” or “approximately” when coupled to a number or a range means plus or minus five percent of the modified number or range.
  • the range is intended to be inclusive of the two numbers that define the range.
  • Coupled means the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable or releasable). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

A rotating coalescer having an ejected coalesced liquid separating device is described. The separating device prevents re-entrainment of liquid into a stream of filtered gas. The rotating coalescer includes a rotating filter element or coalescing cone stack positioned within a rotating coalescer housing. The outer surface of the rotating filter element or the outlet of the coalescing cone stack is displaced from the inner surface of the rotating coalescer housing. The gap between the rotating filter element or the coalescing cone stack and the rotating coalescer housing allows for ejected coalesced liquid, such as oil, to accumulate on the inner surface of the rotating coalescer housing for drainage and allows for filtered gas, such as air, to exit through a clean gas outlet of the rotating coalescer housing.

Description

ROTATING COALESCING ELEMENT WITH DIRECTED LIQUID
DRAINAGE AND GAS OUTLET
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to U.S. Provisional Patent Application No.
62/211,538, entitled "ROTATING COALESCING ELEMENT WITH DIRECTED LIQUID DRAINAGE AND GAS OUTLET," by Schwandt et al., filed on August 28, 2015 and the contents of which are herein incorporated by reference in the entirety and for all purposes.
TECHNICAL FIELD
[0002] The present application relates to rotating coalescing elements.
BACKGROUND
[0003] During operation of an internal combustion engine, a fraction of combustion gases can flow out of the combustion cylinder and into the crankcase of the engine. These gases are often called "blowby" gases. The blowby gases include a mixture of aerosols, oils, and air. If vented directly to the ambient, the blowby gases can harm the environment. Accordingly, the blowby gases are typically routed out of the crankcase via a crankcase ventilation system. The crankcase ventilation system may pass the blowby gases through a coalescer (i.e., a coalescing filter element) to remove a majority of the aerosols and oils contained in the blowby gases. The coalescer includes filter media. The filtered blowby gases ("clean" gases) are then either vented to the ambient (in open crankcase ventilation systems) or routed back to the air intake for the internal combustion engine for further combustion (in closed crankcase ventilation systems).
[0004] Some crankcase ventilation systems utilize rotating coalescers that increase the filter efficiency of the coalescing filter elements by rotating the filter media during filtering. In rotating filter cartridges, the contaminants (e.g., oil droplets suspended and transported by blowby gases) are separated inside the filter media of the filter cartridge through the particle capture mechanisms of inertial impaction, interception, diffusion, and gravitational forces onto the fibers. By rotating the filter media, inertial impaction and gravitational forces are enhanced by the additional centrifugal force. Additionally, the rotation of the filter cartridge can create a pumping effect, which reduces the pressure drop through the filtration system. Rotating filter cartridges may include fibrous filters as well as centrifugal separation devices.
[0005] The centrifugal forces caused by the rotation tend to eject coalesced liquid droplets along the entire axial height of the filter media. Depending on the location of ejection and the speed of rotation, the separated liquid droplets may be re-entrained into the flow stream of filtered air. Further, the ejected liquid droplets may be collected on a stationary surface of the coalescer housing at an undesirable area. This increased liquid carry-over of the rotating coalescer can reduce the efficiency of the filtration system. Further, the increased liquid carryover can make it difficult to position a gas flow outlet for the coalescer housing directly opposite of the rotating coalescer outer diameter due to direct ejection of the coalesced droplets towards the outlet.
SUMMARY
[0006] One example embodiment relates to a filtration system. The filtration system includes a filtration system housing having an inlet and an outlet. A rotating coalescer element is positioned within the filtration system housing and in fluid communication with the inlet and the outlet. The rotating coalescer element is configured to separate a suspended liquid from a fluid received through the inlet. The rotating coalescer element includes a first endplate, a second endplate, and a coalescing device positioned between the first endplate and the second endplate. The rotating coalescer element further includes a rotating coalescer housing extending between and coupled to the first endplate and the second endplate. The rotating coalescer housing is radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device. The rotating coalescer housing includes a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate. The rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
[0007] Another example embodiment relates to a rotating coalescer element. The rotating coalescer element is configured to separate a suspended liquid from a fluid. The rotating coalescer element includes a first endplate, a second endplate, and a coalescing device positioned between the first endplate and the second endplate. The rotating coalescer element further includes a rotating coalescer housing extending between and coupled to the first endplate and the second endplate. The rotating coalescer housing is radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device. The rotating coalescer housing includes a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate. The rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
[0008] These and other features, together with the organization and manner of operation thereof, will become apparent from the following detailed description when taken in conjunction with the accompanying drawings, wherein like elements have like numerals throughout the several drawings described below.
BRIEF DESCRIPTION OF THE FIGURES
[0009] FIG. 1 shows a cross-sectional view of a filtration system is shown according to an example embodiment.
[0010] FIG. 2 shows a cross-sectional view of the rotating filter element of the filtration system of FIG. 1.
[0011] FIG. 3 shows a perspective view of the rotating filter element of the filtration system of FIG. 1. [0012] FIG. 4 shows another perspective view of the rotating filter element of the filtration system of FIG. 1.
[0013] FIG. 5 shows another cross-sectional view of the rotating filter element of the filtration system of FIG. 1.
[0014] FIG. 6 is a cross-sectional view of a rotating coalescer element according to an example embodiment.
[0015] FIG. 7 is a cross-sectional view of a rotating filter element according to another example embodiment.
DETAILED DESCRIPTION
[0016] Referring to the figures generally, a rotating coalescer having an ejected coalesced liquid separating device is described. The separating device prevents re-entrainment of liquid into a stream of filtered gas. The rotating coalescer includes a rotating filter element or coalescing cone stack positioned within a rotating coalescer housing. The outer surface (i.e., the clean side) of the rotating filter element or the outlet of the coalescing cone stack is displaced from the inner surface of the rotating coalescer housing. The gap between the rotating filter element or the coalescing cone stack and the rotating coalescer housing allows for ejected coalesced liquid, such as oil, to accumulate on the inner surface of the rotating coalescer housing for drainage and allows for filtered gas, such as air, to exit through a clean gas outlet of the rotating coalescer housing. In some arrangements, the rotating coalescer housing includes a rib that prevents accumulated liquid from flowing through the clean gas outlet. In further arrangements, the inner surface of the rotating coalescer housing is angled to assist with drainage of the accumulated liquid.
[0017] Referring to FIG. 1, a cross-sectional view of a filtration system 100 is shown according to an example embodiment. The filtration system 100 includes a filtration system housing 102 having an inlet 104 and an outlet 106. The filtration system housing 102 is a stationary housing. The inlet 104 receives fluid to be filtered, such as crankcase blowby gases, and the outlet 106 outputs filtered fluid to a system, such as an internal combustion engine (e.g., a diesel internal combustion engine). The filtration system 100 includes a rotating filter element 108. The rotating filter element 108 is a rotating coalescer element. The rotating filter element 108 includes filter media 110. The filter media 110 shown in FIG. 1 is arranged in a cylindrical shape. The filter media 110 is a coalescing fibrous filter media. The rotating filter element 108 includes a first endplate 112 and a second endplate 114. The filter media 110 is positioned between the first endplate 112 and the second endplate 114. In some arrangements, the filter media 110 is sealed to the first endplate 112 and the second endplate 114. The rotating filter element 108 further includes a rotating coalescer housing 116. The rotating coalescer housing 116 extends between and is coupled to the first endplate 112 and the second endplate 114. The rotating coalescer housing 116 is radially displaced from an outer surface of the filter media 110. Generally, the rotating filter element 108 separates a suspended liquid in the fluid. In arrangements where the filtration system 100 is a crankcase ventilation system, the rotating filter element 108 separates oils and aerosols suspended in the crankcase blowby gases. The rotating filter element 108 is described in further detail below with respect to FIGS. 2 through 7.
[0018] Referring to FIGS. 2 through 5, various views of the rotating filter element 108 are shown. As shown best in FIGS. 2 and 5, the rotating filter element 108 includes a central axis 118. During operation, the rotating filter element 108 rotates about a central axis. Fluid to be filtered enters the filtration system housing 102 through the inlet 104. The fluid flows through the filter media 110 as shown by flow arrows 120 in FIG. 5. As the fluid passes through the filter media 110, liquid droplets dispersed in the fluid are coalesced and separated from the fluid by the filter media 110. Due to the rotation of the rotating filter element 108 and the centrifugal force imparted on the separated liquid, the separated liquid may be ejected from the outlet face of the filter media 110. As noted above, the inner wall of the rotating coalescer housing 116 is separated from the outlet face of the filter media 110 (e.g., by a distance D). The separation distance D permits the ejected liquid to accumulate along the inner wall of the rotating coalescer housing 116 while still providing space for the filtered fluid to flow out of the rotating filter element 108. As the separated liquid accumulates on the inner wall of the rotating coalescer housing 16, the separated liquid may form a film of liquid along the inner wall of the rotating coalescer housing 116. The separated liquid flows to a drain (as designated by the drainage arrow 122). The filtered fluid exits the rotating filter element 108 through a plurality of gas outlets 124 formed between the first endplate 112 and the rotating coalescer housing 116. The accumulated liquid along the inner wall of the rotating coalescer housing 116 exits the rotating filter element 108 through a plurality of liquid outlets 126 formed in the rotating coalescer housing 116 and a plurality of drains 128 formed in the second endplate 114. As shown best in FIG. 3, the liquid outlets 126 are formed near the opposite end of the rotating coalescer housing 116 from the gas outlets 124. As described in further detail below, the rotating coalescer housing 116 includes features that assist in preventing the accumulated fluid from flowing out of the gas outlets 124. In some arrangements, the rotating coalescer housing 116 and the first endplate 112, or at least a portion there of, are formed as a single piece of injection molded thermoplastic.
[0019] In some arrangements, the inner wall of the rotating coalescer housing 116 includes a circumferential ring 130 positioned near the gas outlets 124 of the rotating filter element 108. The circumferential ring 130 prevents the separated liquid from flowing through the gas outlets 124. Due to the rotation of the rotating filter element 108, the film of accumulated liquid that forms along the inner wall of the rotating coalescer housing 116 can only reach a certain thickness. The height of the circumferential ring 130 with respect to the inner wall of the rotating coalescer housing 116 is greater than the maximum thickness of the film of
accumulated liquid thereby preventing the liquid from exiting the rotating filter element through the gas outlets 124.
[0020] In further arrangements, the rotating coalescer housing 116 may be angled at a draft angle a away from the gas outlets 124. In such arrangements, the rotating coalescer housing is narrower at the end adjacent to the gas outlets 124 (i.e., the first endplate 112) and wider at the end adjacent to the liquid outlets 126 (i.e., the second endplate 114). Thus, the rotating coalescer housing 116 may be slightly conical, convex, or concave in shape. During rotation, the centrifugal forces on the accumulated liquid will move the accumulated along angled wall of the rotating coalescer housing 116 in an axial direction towards the liquid outlets 126 and away from the gas outlets 124. In some arrangements, the centrifugal forces on the accumulated liquid in the axial direction are greater than gravity. In such arrangements, the gas outlet 124 and the liquid outlet can be flipped in the direction of gravity (e.g., as shown in FIG. 7).
[0021] Neglecting viscous and/or shear forces from the flow of gas between the filter media 110 and the rotating coalescer housing 116, the accumulated liquid on the inner wall of the rotating coalescer housing 116 forms a "near vertical" liquid film, where the equilibrium surface angle with respect to axis = a (if no drainage occurred and the accumulated liquid were trapped within the rotating filter element 108) would be approximately tan_1(l/Gradial), where the Gradial is defined by equation (1) below.
(1) Q2*R = Gradial > -1000
[0022] In equation 1, ω is the rotational speed of the rotating filter element 108 during operation and R is the distance between the central axis 118 and the inside of the rotating coalescer housing 116. Accordingly, the height of the circumferential ring 130, the draft angle a, or a combination thereof creates an effective angle greater than tan_1(l/Gradial) to achieve drainage in the desired direction (i.e., away from the gas outlets 124 and towards the liquid outlets 126. For example, for a Gradial of approximately 1000, the draft angle 132 is approximately 0.06 degrees.
[0023] Still referring to FIGS. 1 through 5, in some arrangements, the rotating coalescer housing 116 includes a plurality of support ribs 132 projecting from the inner surface of the rotating coalescer housing 116 to the outlet face of the filter media 110. The support ribs 132 provide support to the flexible fibrous media 110 during rotation of the filter element 108 to prevent excessive deformation of the filter media 110 during high speed rotation. In order to allow filtered fluid to exit through the gas outlets 124, the support ribs 132 may include a number of first through-holes that allow the filtered fluid to pass between the support ribs 132.
Alternatively, gas outlets 124 may be positioned between adjacent sets of support ribs 132 and between the outermost support ribs 132 and the first and second endplates 112 and 114.
Additionally, to allow the accumulated liquid to drain, the support ribs 132 include a number of second through-holes that allow the accumulated liquid to pass between the support ribs 132. Alternatively, liquid outlets 126 may be positioned between adjacent sets of support ribs 132 and between the outermost support ribs 132 and the first and second endplates 112 and 114.
[0024] In some arrangements, an axial rib ring extends 134 from the gas outlet end of the rotating coalescer housing 116 adjacent to the filter media 110. The axial rib ring 134 extends into the rotating coalescer housing 116 beyond the axial location of the circumferential ring 130, which prevents accumulated liquid from migrating to the gas outlets 124. The axial rib ring 134 acts as a weir that prevents accumulated liquid exiting the filter media 110 from ejecting directly to the gas outlets 124.
[0025] Referring to FIG. 6, a cross-sectional view of a rotating coalescer element 600 is shown according to an example embodiment. The rotating coalescer element 600 is similar to the rotating filter element 108 of filtration system 100. Accordingly, like numbering is used between the rotating coalescer element 600 of FIG. 6 and the rotating filter element of FIGS. 1 through 5. The only difference between the rotating coalescer element 600 and the rotating filter element 108 is that the rotating coalescer element 600 does not utilize filter media to separate a liquid suspended in the fluid flowing through the rotating coalescer element 600. Rather, the rotating coalescer element 600 utilizes a centrifuge cone stack 602. The centrifuge cone stack 602 includes a plurality of axially spaced centrifuge cones 604. Each of the cones is angled with respect to the radial direction. As the gas passes through the space between each of the axially spaced centrifuge cones 604, the angle of the individual axially spaced centrifuge cones 604 causes an abrupt change in direction of the gas. The abrupt change of direction separates the suspended liquid due to the higher inertia of the liquid as compared to the gas.
[0026] FIG. 7 shows a cross-sectional view of a rotating filter element 700 according to an example embodiment. The rotating filter element 700 is similar to the rotating filter element 108 of filtration system 100. Accordingly, like numbering is used between the rotating filter element 700 of FIG. 7 and the rotating filter element of FIGS. 1 through 5. As shown in FIG. 7, the rotating filter element 700 is oriented in the opposite direction with respect to gravity 702 than the rotating filter element 108. Accordingly, the accumulated liquid is drained from the rotating filter element 700 against the force of gravity. The drainage is achieved because the centrifugal force on the accumulated liquid is high enough to overcome the force of gravity. The orientation of the filter element 700 permits a top inlet of the gas-liquid mixture into the device and a bottom clean gas outlet. Such an arrangement may be preferred for certain crankcase ventilation applications in which the source of the aerosol laden blowby gas to be cleaned is above the location of the rotating coalescing device.
[0027] The above-described rotating coalescer and filter elements may be used in crankcase ventilation systems. In some arrangements, the above-described rotating coalescer and filter elements are used in high-speed rotating coalescer arrangements in which the radial g-force at the inner diameter of the rotating coalescer housing 116 is at least 1000 times the force of gravity.
[0028] The above-described rotating coalescer and filter elements provide a number advantages in accordance with various embodiments. By changing the shape of the rotating coalescer housing (e.g., the rotating coalescer housing 116), separated liquid can be directed to a desired location by harnessing axial and radial components of the centrifugal force created by the rotation. This allows for an unlimited amount of locations for accumulated liquid to be ejected from the rotating coalescer housing. This minimizes or eliminates the risk of accumulated liquid becoming re-entrained into the filtered fluid via the gas outlet. Similarly, by utilizing the centrifugal forces to move the accumulated liquid, the coalescing element could be operated at any angle, provided that the outlet liquid ejected from the rotating body is captured in an area of the stationary housing which directs the ejected liquid away and does not allow it to recombine with the clean gas outlet.
[0029] It should be noted that any use of the term "example" herein to describe various embodiments is intended to indicate that such embodiments are possible examples,
representations, and/or illustrations of possible embodiments (and such term is not intended to connote that such embodiments are necessarily extraordinary or superlative examples).
[0030] As used herein, the term "about" or "approximately" when coupled to a number or a range means plus or minus five percent of the modified number or range. When a range is described as being between two numbers, the range is intended to be inclusive of the two numbers that define the range.
[0031] The terms "coupled" and the like as used herein mean the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable or releasable). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.
[0032] References herein to the positions of elements (e.g., "top," "bottom," "above," "below," etc.) are merely used to describe the orientation of various elements in the FIGURES. It should be noted that the orientation of various elements may differ according to other example embodiments, and that such variations are intended to be encompassed by the present disclosure.
[0033] It is important to note that the construction and arrangement of the various example embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Additionally, features from particular embodiments may be combined with features from other embodiments as would be understood by one of ordinary skill in the art. Other substitutions, modifications, changes and omissions may also be made in the design, operating conditions and arrangement of the various example embodiments without departing from the scope of the present invention.

Claims

WHAT IS CLAIMED IS:
1. A filtration system comprising:
a filtration system housing having an inlet and an outlet,
a rotating coalescer element positioned within the filtration system housing and in fluid communication with the inlet and the outlet, the rotating coalescer element configured to separate a suspended liquid from a fluid received through the inlet, the rotating coalescer element including:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate, the rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
2. The filtration system of claim 1, wherein the coalescing device includes a fibrous filter media.
3. The filtration system of claim 1, wherein the coalescing device includes a coalescer cone stack.
4. The filtration system of claim 1, wherein the rotating coalescer housing is narrower at a first end adjacent to the gas outlet and wider at a second end adjacent to the liquid outlet.
5. The filtration system of claim 4, wherein the accumulated liquid is drained from the rotating coalescer element against the force of gravity.
6. The filtration system of claim 1, wherein the rotating coalescer element is a high-speed rotating coalescer element that creates a radial g-force at the inner wall of the rotating coalescer housing of at least 1000 times the force of gravity.
7. The filtration system of claim 1, wherein the fluid is crankcase blowby gas received from an internal combustion engine.
8. The filtration system of claim 1, wherein the second endplate comprises a plurality of drains.
9. The filtration system of claim 1, wherein the rotating coalescer housing comprises a support rib projecting from the inner wall to provide support to the coalescing device.
10. The filtration system of claim 9, wherein the support rib comprises a through-hole configured to allow filtered fluid to pass through the support rib.
11. A rotating coalescer element configured to separate a suspended liquid from a fluid, the rotating coalescer element comprising:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate, the rotating coalescer housing including a circumferential ring positioned near the gas outlet that prevents separated liquid accumulated on the inner wall from passing through the clean gas outlet.
12. The rotating coalescer element of claim 11, wherein the coalescing device includes a fibrous filter media.
13. The rotating coalescer element of claim 11, wherein the coalescing device includes a coalescer cone stack.
14. The rotating coalescer element of claim 11, wherein the rotating coalescer housing is narrower at a first end adjacent to the gas outlet and wider at a second end adjacent to the liquid outlet.
15. The rotating coalescer element of claim 14, wherein the accumulated liquid is drained from the rotating coalescer element against the force of gravity.
16. The rotating coalescer element of claim 11, wherein the rotating coalescer element is a high-speed rotating coalescer element that creates a radial g-force at the inner wall of the rotating coalescer housing of at least 1000 times the force of gravity.
17. The rotating coalescer element of claim 11, wherein the fluid is crankcase blowby gas received from an internal combustion engine.
18. The rotating coalescer element of claim 11, wherein the second endplate comprises a plurality of drains.
19. The rotating coalescer element of claim 11, wherein the rotating coalescer housing comprises a support rib projecting from the inner wall to provide support to the coalescing device.
20. The rotating coalescer element of claim 19, wherein the support rib comprises a through-hole configured to allow filtered fluid to pass through the support rib.
PCT/US2016/048912 2015-08-28 2016-08-26 Rotating coalescing element with directed liquid drainage and gas outlet Ceased WO2017040256A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE112016003302.8T DE112016003302T5 (en) 2015-08-28 2016-08-26 Rotating coalescer element with directional liquid drainage and directed gas outlet
US15/753,778 US10682601B2 (en) 2015-08-28 2016-08-26 Rotating coalescing element with directed liquid drainage and gas outlet
CN201680048211.XA CN107921346B (en) 2015-08-28 2016-08-26 Rotary coalescing element with directional liquid discharge and gas outlets
US16/876,509 US11504665B2 (en) 2015-08-28 2020-05-18 Rotating coalescing element with directed liquid drainage and gas outlet
US17/965,575 US11964224B2 (en) 2015-08-28 2022-10-13 Rotating coalescing element with directed liquid drainage and gas outlet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562211538P 2015-08-28 2015-08-28
US62/211,538 2015-08-28

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US15/753,778 A-371-Of-International US10682601B2 (en) 2015-08-28 2016-08-26 Rotating coalescing element with directed liquid drainage and gas outlet
US16/876,509 Continuation US11504665B2 (en) 2015-08-28 2020-05-18 Rotating coalescing element with directed liquid drainage and gas outlet

Publications (1)

Publication Number Publication Date
WO2017040256A1 true WO2017040256A1 (en) 2017-03-09

Family

ID=58188031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/048912 Ceased WO2017040256A1 (en) 2015-08-28 2016-08-26 Rotating coalescing element with directed liquid drainage and gas outlet

Country Status (4)

Country Link
US (3) US10682601B2 (en)
CN (2) CN111001225B (en)
DE (1) DE112016003302T5 (en)
WO (1) WO2017040256A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3459615A1 (en) * 2017-09-26 2019-03-27 United Technologies Corporation Deoiler for a gas turbine engine
US11446598B2 (en) 2017-06-20 2022-09-20 Cummins Filtration Ip, Inc. Axial flow centrifugal separator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008038160A1 (en) 2008-08-18 2010-02-25 Mahle International Gmbh filtering device
CN121222126A (en) * 2016-07-19 2025-12-30 安美世滤清系统知识产权公司 Perforated layer coalescer
EP3801828B1 (en) * 2018-05-24 2025-11-26 Cummins Filtration IP, Inc. Anti-rotation features for crankcase ventilation filters
WO2020163114A1 (en) * 2019-02-04 2020-08-13 Cummins Filtration Ip, Inc. Split flow axial crankcase separator
CN110420517B (en) * 2019-08-13 2024-03-29 中国石油大学(北京) Coalescence filter core structure and filter equipment
US11988121B2 (en) 2020-01-28 2024-05-21 Cummins Filtration Inc. Electric motor integrated rotating crankcase ventilation filter assemblies
CN113882930B (en) * 2021-08-30 2024-04-09 北京北机机电工业有限责任公司 High-temperature-resistant oil-gas separator
CN116357430A (en) * 2023-01-29 2023-06-30 苏州达菲特过滤技术股份有限公司 Gas-liquid separation device and engine system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139595A (en) * 1998-09-18 2000-10-31 Fleetguard, Inc. Air/oil coalescer with centrifugally assisted drainage
US6640792B2 (en) * 2001-08-16 2003-11-04 Commins Engine Company, Inc. Air/oil coalescer with an improved centrifugally assisted drainage
US7235177B2 (en) * 2003-04-23 2007-06-26 Fleetguard, Inc. Integral air/oil coalescer for a centrifuge
US8794222B2 (en) * 2010-01-27 2014-08-05 Cummins Filtration Ip, Inc. Crankcase ventilation inside-out flow rotating coalescer
US8974587B2 (en) * 2010-11-15 2015-03-10 Honda Motor Co., Ltd. Casting sand core composition

Family Cites Families (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2788125A (en) 1953-07-31 1957-04-09 Edmond F Webb Fuel filter
US2937755A (en) 1954-09-13 1960-05-24 Acf Ind Inc Filter for electric fuel pump
US2905327A (en) 1958-04-03 1959-09-22 Tillotson Mfg Co Fuel filter
NL285656A (en) 1961-11-22
US3362155A (en) 1965-03-29 1968-01-09 Gen Electric Axial flow separator
DE1941194U (en) 1966-03-23 1966-06-23 Draftex G M B H SEALING OR DECORATIVE STRIP SLIDED ON A FLANGE.
US3451551A (en) 1967-09-15 1969-06-24 Aero Flow Dynamics Inc Free-flow filter bypass valve
US3655058A (en) 1970-07-13 1972-04-11 Richard A Novak Filtration apparatus
US3993564A (en) 1972-04-06 1976-11-23 Advanced Product Engineering Corporation Filtration apparatus
JPS5392973A (en) 1977-01-26 1978-08-15 Sanetsu Kk Oil mist remover
JPS5933890Y2 (en) 1978-03-07 1984-09-20 株式会社デンソー Air cleaner element for internal combustion engine
US4502956A (en) 1982-02-24 1985-03-05 Racor Industries, Inc. Filter assembly
US4482365A (en) 1982-03-01 1984-11-13 Pall Corporation Vortex air cleaner and self-cleaning barrier filter assembly for supercharged engines
US4487618A (en) 1982-08-19 1984-12-11 La-Man Corporation Airline vapor trap
NL8204722A (en) 1982-12-07 1984-07-02 Philips Nv DISTRIBUTION SYSTEM FOR LOCAL FIBERNET.
US4516994A (en) 1984-04-11 1985-05-14 Vilter Manufacturing Corporation Apparatus for separating liquid droplets from gas
US4514193A (en) 1984-07-26 1985-04-30 Donaldson Company, Inc. Self-cleaning air cleaner assembly with rotating filter element and inertial pre-cleaner
DE3737221C1 (en) 1987-11-03 1989-04-27 Mtu Muenchen Gmbh OEl air separator
US5056935A (en) 1990-11-05 1991-10-15 General Electric Company Oil film damper seal ring
US5387342A (en) 1992-06-10 1995-02-07 Charles W. Taggart Centrifugal separator and method
US5401706A (en) 1993-01-06 1995-03-28 Semco Incorporated Desiccant-coated substrate and method of manufacture
US5244479A (en) * 1993-03-15 1993-09-14 United Technologies Corporation Liquid/gas separator for soapy liquid
GB9320231D0 (en) 1993-10-01 1993-11-17 Boc Group Plc Gas-liquid separation methods and apparatus
US5462658A (en) 1994-01-14 1995-10-31 Thermo King Corporation Fuel filter system
US6033450A (en) 1995-12-21 2000-03-07 United Technologies Corporation Deoiler shaft vortex separator
US5716423A (en) 1995-12-21 1998-02-10 United Technologies Corporation Multi-stage deoiler with porous media
US5693125A (en) * 1995-12-22 1997-12-02 United Technologies Corporation Liquid-gas separator
US6123061A (en) 1997-02-25 2000-09-26 Cummins Engine Company, Inc. Crankcase ventilation system
JPH11141325A (en) 1997-11-11 1999-05-25 Toyota Autom Loom Works Ltd Oil reflux device for blowby gas
US6183407B1 (en) 1998-04-02 2001-02-06 Alfa Laval Ab Centrifugal separator having axially-extending, angled separation discs
US6177983B1 (en) 1998-09-17 2001-01-23 Microtrac, Inc. Method and system for the measurement of specific characteristics of small particles
US6876760B1 (en) 2000-12-04 2005-04-05 Cytokinetics, Inc. Classifying cells based on information contained in cell images
SE516944C2 (en) 1999-06-30 2002-03-26 Volvo Lastvagnar Ab Oil separator for small particles
US6652439B2 (en) 2000-04-04 2003-11-25 Fleetguard, Inc. Disposable rotor shell with integral molded spiral vanes
DE10044615A1 (en) 2000-09-09 2002-04-04 Mahle Filtersysteme Gmbh Ventilation device for a crankcase
US6499285B1 (en) 2001-08-01 2002-12-31 Rolls-Royce Corporation Particle separator for a gas turbine engine
US20040071328A1 (en) 2001-09-07 2004-04-15 Vaisberg Eugeni A. Classifying cells based on information contained in cell images
US6517612B1 (en) 2001-10-29 2003-02-11 Gore Enterprise Holdings, Inc. Centrifugal filtration device
DE10221694B4 (en) 2002-05-16 2018-07-12 Branofilter Gmbh Multi-layer filter construction, use of such a multi-layer filter assembly, dust filter bag, bag filter bag, pleated filter, surface exhaust filter and air filter for motor vehicles
SE0201982D0 (en) 2002-06-24 2002-06-24 Alfa Laval Corp Ab Ways to clean crankcase gas and a gas purifier separator
US6827764B2 (en) 2002-07-25 2004-12-07 3M Innovative Properties Company Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers
US7306715B2 (en) 2002-08-05 2007-12-11 Denso Corporation Pump module
US6858067B2 (en) * 2002-11-12 2005-02-22 Perry Equipment Corporation Filtration vessel and method for rotary gas compressor system
DE20302824U1 (en) 2003-02-21 2004-07-08 Hengst Gmbh & Co.Kg Oil separator for cleaning crankcase ventilation gas of an internal combustion engine containing oil mist
GB0417458D0 (en) 2004-08-05 2004-09-08 Domnick Hunter Ltd Filter assembly
US7614390B2 (en) 2007-08-23 2009-11-10 Cummins Filtration Ip Inc. Two stage drainage gas-liquid separator
EP1645320A1 (en) 2004-10-08 2006-04-12 Mann+Hummel Gmbh Centrifugal separator
US8057567B2 (en) 2004-11-05 2011-11-15 Donaldson Company, Inc. Filter medium and breather filter structure
EP1827649B1 (en) 2004-11-05 2013-02-27 Donaldson Company, Inc. Filter medium and structure
DE102005021278B4 (en) 2005-05-09 2010-04-15 Alfa Laval Tumba Ab Device for cleaning gas when venting a crankcase
US8231752B2 (en) 2005-11-14 2012-07-31 Cummins Filtration Ip Inc. Method and apparatus for making filter element, including multi-characteristic filter element
US7416576B2 (en) 2006-01-27 2008-08-26 Mecs, Inc. Fiber bed assembly and fiber bed therefor
SE529609C2 (en) 2006-02-13 2007-10-02 Alfa Laval Corp Ab centrifugal
SE529611C2 (en) 2006-02-13 2007-10-02 Alfa Laval Corp Ab centrifugal
SE529610C2 (en) 2006-02-13 2007-10-02 Alfa Laval Corp Ab centrifugal
JP2007296512A (en) 2006-04-05 2007-11-15 Ngk Insulators Ltd Honeycomb filter
US7338546B2 (en) 2006-04-19 2008-03-04 Alfa Laval Corporate Ab Centrifugal separator for cleaning gas generated by an internal combustion engine and a method for operating the same
DE102006024816A1 (en) 2006-05-29 2007-12-06 Mahle International Gmbh Device for venting a crankcase
EP2117674A1 (en) 2007-02-22 2009-11-18 Donaldson Company, Inc. Filter element and method
US7708519B2 (en) 2007-03-26 2010-05-04 Honeywell International Inc. Vortex spoiler for delivery of cooling airflow in a turbine engine
DE202007005552U1 (en) 2007-04-16 2007-08-16 Donaldson Filtration Deutschland Gmbh Filter element for coalescence filter for oil- and condensate separation from compressed air/gases, e.g. in instrumental air supply unit/in compressing air technology unit, comprises outer bearing cover, coalescence layer and filter medium
CN101720479A (en) 2007-05-02 2010-06-02 新加坡科技研究局 Motion compensated image averaging
CN101743329A (en) 2007-05-11 2010-06-16 平移基因组学研究所 Method for determining the effect of external stimuli on biological pathways in living cells
DE202007009913U1 (en) 2007-07-13 2008-11-20 Hengst Gmbh & Co.Kg Separator for separating oil mist from the crankcase ventilation gas of an internal combustion engine and internal combustion engine with a separator
US7618480B2 (en) 2007-07-16 2009-11-17 Flair Corporation Filter assembly and method
US7708793B2 (en) 2007-08-29 2010-05-04 Bendix Commercial Vehicle Systems Llc Purge exhaust processor
DE202007014822U1 (en) 2007-10-02 2009-02-19 Mann+Hummel Gmbh Filter element Zackendichtung
US8007565B2 (en) 2007-10-23 2011-08-30 The Sy-Klone Company Powered air cleaning system and air cleaning method
BRPI0821434A2 (en) 2007-12-28 2015-06-16 3M Innovative Properties Co Composite non-woven fibrous blankets and methods for preparing and using same
DE102008005574B4 (en) 2008-01-22 2013-11-28 Areva Gmbh centrifugal
US20090263238A1 (en) 2008-04-17 2009-10-22 Minebea Co., Ltd. Ducted fan with inlet vanes and deswirl vanes
WO2009143285A2 (en) 2008-05-21 2009-11-26 Amylin Pharmaceuticals, Inc. Exendins to lower cholestrol and triglycerides
FR2933626B1 (en) 2008-07-10 2011-01-21 Filtrauto DEVICE WITH ROTOR WITH MEDIA COALESCER FOR SEPARATING THE OIL FROM THE CASING GASES OF AN INTERNAL COMBUSTION ENGINE.
DE102008038160A1 (en) * 2008-08-18 2010-02-25 Mahle International Gmbh filtering device
US8069658B2 (en) 2008-11-26 2011-12-06 Corning Incorporated Methods for estimating particulate load in a particulate filter, and related systems
US8974567B2 (en) 2010-01-27 2015-03-10 Cummins Filtration Ip Inc. Rotating coalescer with keyed drive
US9194265B2 (en) * 2010-01-27 2015-11-24 Cummins Filtration Ip, Inc. Rotating separator with housing preventing separated liquid carryover
US8940068B2 (en) 2010-01-27 2015-01-27 Cummins Filtration Ip Inc. Magnetically driven rotating separator
US8893689B2 (en) 2010-01-27 2014-11-25 Cummins Filtration Ip, Inc. Crankcase ventilation self-cleaning coalescer with intermittent rotation
EP3689436A1 (en) 2010-02-12 2020-08-05 Donaldson Company, Inc. Liquid filtration media
BR112012021246A2 (en) 2010-02-23 2018-04-03 3M Innovative Properties Co dimensionally stable fibrous nonwoven webs and methods for preparing and using them.
CN102859060B (en) 2010-04-22 2016-03-02 3M创新有限公司 The method of the non-woven nanofiber web containing chemism particle and manufacture and the non-woven nanofiber web of use
US8814501B2 (en) 2010-08-06 2014-08-26 Minebea Co., Ltd. (Minebea) Fan with area expansion between rotor and stator blades
WO2012057029A1 (en) 2010-10-25 2012-05-03 株式会社カネカ Novel leucocyte removal filter
US9346002B2 (en) 2010-12-22 2016-05-24 Donaldson Company, Inc. Crankcase ventilation filter assembly, components, and methods
US10105624B2 (en) 2011-02-03 2018-10-23 Donaldson Company, Inc. Filter media pack, filter assembly, and method
CN118490942A (en) 2011-04-18 2024-08-16 瑞思迈发动机及马达技术股份有限公司 PAP system blower
US8986539B2 (en) * 2011-04-19 2015-03-24 Cummins Filtration Ip Inc. Inside-out flow filter with pressure recovery
WO2013025445A2 (en) 2011-08-12 2013-02-21 Donaldson Company, Inc. Liquid filtration media containing melt-blown fibers
IN2014CN03311A (en) 2011-11-04 2015-07-03 Cummins Filtration Ip Inc
DE102012104598A1 (en) 2012-05-29 2013-12-05 Elringklinger Ag Separator and method for separating liquid droplets from an aerosol
US9005340B2 (en) 2012-10-04 2015-04-14 Mecs, Inc. Fiber bed assembly including a re-entrainment control device for a fiber bed mist eliminator
US9757000B2 (en) 2013-12-24 2017-09-12 Samsung Electronics Co., Ltd. Cleaning device
CN105849374B (en) * 2014-01-14 2019-06-18 康明斯过滤Ip公司 Crankcase ventilation system heater
JP6190768B2 (en) 2014-07-02 2017-08-30 株式会社日立ハイテクノロジーズ Electron microscope apparatus and imaging method using the same
WO2016046944A1 (en) 2014-09-25 2016-03-31 東京濾器株式会社 Separation disk for oil separator, rotor for oil separator, and oil separator
US10265456B2 (en) 2014-12-30 2019-04-23 Kolon Industries, Inc. Blood filter and method of manufacturing the same
DE102015202946A1 (en) 2015-02-18 2016-08-18 Mahle International Gmbh Pumping device for driving blow-by gas
US10087824B2 (en) 2015-02-25 2018-10-02 Garrett Transportation 1 Inc. Wastegate with injected flow
US9342731B1 (en) 2015-03-26 2016-05-17 Effat University System and method for identification of fingerprints
US10543442B2 (en) 2015-03-30 2020-01-28 Cummins Filtration Ip, Inc. Multiple stage rotating coalescer devices
WO2017189516A1 (en) 2016-04-28 2017-11-02 Cummins Filtration Ip, Inc. Inside-out rotating coalescer with gas exit through hollow shaft
DE102016211776A1 (en) 2016-06-29 2018-01-04 Elringklinger Ag separating
JP6020764B1 (en) 2016-08-03 2016-11-02 日東紡績株式会社 Glass cloth
CN106556940B (en) 2016-11-10 2019-11-19 武汉精测电子集团股份有限公司 A kind of background suppression method in TFT-LCD screen automatic optics inspection
WO2019067832A1 (en) 2017-09-28 2019-04-04 Aqseptence Group, Inc. System and related methods for fabrication of wire based screen filters
WO2019213107A1 (en) 2018-05-03 2019-11-07 Cummins Filtration Ip, Inc. Composite filter media with multiple fiber structures including nanofibers
DE102018215358A1 (en) 2018-09-10 2020-03-12 Mann+Hummel Gmbh Filter medium for fluid filtration, method for producing a filter medium and fluid filter
CN111414849B (en) 2020-03-19 2020-12-29 四川大学 A face recognition method based on evolutionary convolutional neural network

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139595A (en) * 1998-09-18 2000-10-31 Fleetguard, Inc. Air/oil coalescer with centrifugally assisted drainage
US6640792B2 (en) * 2001-08-16 2003-11-04 Commins Engine Company, Inc. Air/oil coalescer with an improved centrifugally assisted drainage
US7235177B2 (en) * 2003-04-23 2007-06-26 Fleetguard, Inc. Integral air/oil coalescer for a centrifuge
US8794222B2 (en) * 2010-01-27 2014-08-05 Cummins Filtration Ip, Inc. Crankcase ventilation inside-out flow rotating coalescer
US8974587B2 (en) * 2010-11-15 2015-03-10 Honda Motor Co., Ltd. Casting sand core composition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11446598B2 (en) 2017-06-20 2022-09-20 Cummins Filtration Ip, Inc. Axial flow centrifugal separator
US11951431B2 (en) 2017-06-20 2024-04-09 Cummins Filtration Ip, Inc. Axial flow centrifugal separator
US12303816B2 (en) 2017-06-20 2025-05-20 Cummins Filtration Ip, Inc. Axial flow centrifugal separator
EP3459615A1 (en) * 2017-09-26 2019-03-27 United Technologies Corporation Deoiler for a gas turbine engine

Also Published As

Publication number Publication date
CN111001225A (en) 2020-04-14
US10682601B2 (en) 2020-06-16
US20180243677A1 (en) 2018-08-30
US20200276532A1 (en) 2020-09-03
DE112016003302T5 (en) 2018-05-24
CN111001225B (en) 2021-11-19
CN107921346A (en) 2018-04-17
CN107921346B (en) 2020-01-07
US11504665B2 (en) 2022-11-22
US20230036998A1 (en) 2023-02-02
US11964224B2 (en) 2024-04-23

Similar Documents

Publication Publication Date Title
US11964224B2 (en) Rotating coalescing element with directed liquid drainage and gas outlet
US10543442B2 (en) Multiple stage rotating coalescer devices
CN112901310B (en) Inside-out rotating coalescer that vents gas through a hollow shaft
US20240173661A1 (en) Systems and methods for rotating coalescers maintaining positive recirculation through a dynamic seal
JP5519024B2 (en) Separation system for separating particles of a first fluid from a second fluid stream
GB2401331A (en) A combination centrifuge and filter system
KR20180063309A (en) Separator device for gas purification
US20180290086A1 (en) Fuel Filter
US20170028330A1 (en) Porous Filter Media for Use in Preventing Liquid Carryover
US12071873B2 (en) Anti-rotation features for crankcase ventilation filters
WO2018186848A1 (en) Fuel filter
EP3720588B1 (en) Crankcase ventilation systems having a swirl breaker to reduce pressure drop in tangentially exiting fluids
CN121909323A (en) Crankcase ventilation filter assembly with rotary filter element and stationary filter element

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16842672

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 112016003302

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16842672

Country of ref document: EP

Kind code of ref document: A1