WO2012125187A1 - Cost-effective tunable precleaner - Google Patents

Cost-effective tunable precleaner Download PDF

Info

Publication number
WO2012125187A1
WO2012125187A1 PCT/US2011/057732 US2011057732W WO2012125187A1 WO 2012125187 A1 WO2012125187 A1 WO 2012125187A1 US 2011057732 W US2011057732 W US 2011057732W WO 2012125187 A1 WO2012125187 A1 WO 2012125187A1
Authority
WO
WIPO (PCT)
Prior art keywords
precleaner
air
insert
housing
inlet
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/US2011/057732
Other languages
French (fr)
Inventor
Kenneth M. Tofsland
Stephen L. Fallon
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 DE112011103951.4T priority Critical patent/DE112011103951B4/en
Priority to CN201180041424.7A priority patent/CN103068463B/en
Priority to BR112013003452A priority patent/BR112013003452A2/en
Publication of WO2012125187A1 publication Critical patent/WO2012125187A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces 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
    • 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

Definitions

  • the invention relates to inertial separation precleaners for air filters.
  • Inertial separation precleaners for air filters are known. Incoming dirty or dust laden air is partially cleaned by the precleaner and then sent downstream to a filter. An inertial separation precleaner imparts centrifugal force on the incoming dirt laden air to effect dirt particle separation. A radial vane precleaner deflects the incoming dirt laden air and mechanically imparts a centrifugal force on it, as is known.
  • Inertial separation radial vane separators are designed for a limited flow rate range, and there is a trade-off between system efficiency and system restriction within the design flow rate range. If the system is operated at a flow rate above the range, the system restriction can get too high, which can lead to reduced system capacity, which can have consequential deleterious effects, e.g. loss of engine power in engine applications. If the system is operated below the design flow rate range, precleaner efficiency suffers. Typically, the efficiency of the ificantly affects system capacity. Small changes in precleaner efficiency can determine whether capacity targets can be attained.
  • the present system arose during continuing development efforts in the above technology.
  • the present system provides further cost reduction in tuning precleaner performance without re-design and re-tooling, and without requiring replacement of the radial vane structure or inlet distributor.
  • particularly cost-effective tuning methodology is enabled providing differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
  • FIG. 1 is an isometric view of an air precleaner in accordance with the disclosure.
  • Fig. 2 is an isometric view of a portion of Fig. 1.
  • Fig. 3 is like Fig. 2 and shows another embodiment.
  • Fig. 4 is an exploded perspective view of the construction of Fig. 3.
  • Fig. 5 is like Fig. 3 and shows another embodiment.
  • Fig. 6 is an exploded perspective view of the construction of Fig. 5.
  • Fig. 7 is like Fig. 3 and shows another embodiment.
  • Fig. 8 is an exploded perspective view of the construction of Fig. 7.
  • Fig. 9 is like Fig. 3 and shows another embodiment.
  • Fig. 10 is an exploded perspective view of the construction of Fig. 9.
  • FIG. 1 shows an air precleaner 20 for a filter 22 downstream thereof.
  • the precleaner includes a housing 24 having an inlet 26 receiving incoming dirt laden air, vane structure 28 imparting centrifugal force on the air to inertially separate dirt particles therefrom to preclean the air, and an outlet 30 discharging precleaned air, e.g. to downstream filter 22.
  • the precleaner housing has a flowpath therethrough from inlet 28 to outlet 30.
  • a second outlet is provided at 32 for discharging separated contaminant particulate, which outlet 32 may include a one-way valve such as shown in dashed line at 34, all as is known.
  • a replaceable insert 36 is removably mounted to the precleaner housing and alters air flow velocity through the precleaner housing by changing the flow area of the flowpath through the precleaner housing.
  • the replaceable insert is replaceable with a different insert for the same precleaner housing, with the different insert providing a different flow area through the precleaner housing, enabling a selectable precleaner efficiency vs. restriction trade-off as chosen by a user for a particular application, enabling tuning of precleaner performance by the user for the particular application, and in one desirable embodiment, without having to buy another precleaner housing nor having to re-design nor re-tool the combination.
  • a series of inserts are provided, each being selectable for removable and replaceable mounting to the precleaner housing and providing differing flow areas of the flowpath through the precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
  • Inlet 26 is provided by a circular inlet having a central hub 38 and an outer circumferential sidewall 40.
  • the noted vane structure is provided by a plurality of vanes 42 extending radially outwardly from hub 38 to sidewall 40.
  • the sidewall is spaced radially outwardly of the hub by an annular gap therebetween.
  • the air flowpath flows through such annular gap in an annulus, which annulus has a radial width between an inner circumference and an outer circumference, with the outer circumference circumscribing the inner circumference.
  • insert 36 is at hub 38 and increases the diameter of the noted inner circumference of the flowpath annulus, to reduce the noted radial width of the flowpath annulus.
  • a series of inserts 36 e.g. inserts 36a, 36b, etc., are provided of increasing diameter providing selectively differing reductions of the noted radial width of the noted flowpath annulus.
  • the insert is provided by a cap as shown at 36 in Figs. 3,
  • the insert is provided by a disk as shown at 36c in Figs. 5, 6, which may or may not also include cap 36, as shown in Figs. 7, 8.
  • the insert may be provided by a ring 36d, Figs. 9, 10, downstream of the vanes, and which may be provided in combination with any of the above embodiments.
  • the insert is upstream of the vane structure, Figs. 3-8.
  • the insert is downstream of the vane structure, Figs. 9, 10.
  • the insert is shown at the noted inlet 26.
  • the insert may be provided at the outlet.
  • the insert is a flexible member downstream of the vane structure, e.g. a flexible ring 36d which may flex to vary the noted flow area.
  • the system provides a method for cost-effectively tuning air precleaner performance for a particular application according to user selection for an air precleaner 20 for a filter 22 downstream thereof.
  • the air precleaner includes a precleaner housing 24 having an inlet 26 receiving incoming dirt laden air, vane structure 28 imparting centrifugal force on the air to inertially separate dirt laden particles therefrom to preclean the air, and an outlet 30 discharging precleaned air to the downstream air filter such as 22.
  • the precleaner housing has a flowpath therethrough from inlet 26 to outlet 30.
  • the method includes providing a replaceable insert 36 removably mounted to the precleaner housing and altering air flow velocity through the precleaner housing by changing flow area of the flowpath through the precleaner housing.
  • the method includes replacing the insert with a different insert for the same precleaner housing, with the different insert providing a different flow area through the precleaner housing, to enable tuning of precleaner performance by the user for the particular application. In one embodiment, this is enabled without having to buy another precleaner housing nor having to re-design nor retool the combination. In a further embodiment, a series of inserts are provided, each being selectable for removable and replaceable mounting to the precleaner housing and providing differing flow areas through the precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cyclones (AREA)

Abstract

An inertial separation air precleaner system includes a replaceable insert removably mounted to the precleaner and altering air flow velocity through the precleaner by changing flow area of the flowpath through the precleaner housing. The replaceable insert is replaceable with a different insert for the same precleaner housing, which different insert provides a different flow area through the precleaner housing, enabling a selectable precleaner efficiency vs. restriction trade-off as chosen by a user for a particular application, enabling tuning of precleaner performance by the user.

Description

COST-EFFECTIVE TUNABLE PRECLEANER
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of and priority from Provisional U.S. Patent Application No. 61/452,667, filed March 15, 201 1, incorporated herein by reference.
BACKGROUND AND SUMMARY
[0002] The invention relates to inertial separation precleaners for air filters.
[0003] Inertial separation precleaners for air filters are known. Incoming dirty or dust laden air is partially cleaned by the precleaner and then sent downstream to a filter. An inertial separation precleaner imparts centrifugal force on the incoming dirt laden air to effect dirt particle separation. A radial vane precleaner deflects the incoming dirt laden air and mechanically imparts a centrifugal force on it, as is known.
[0004] Inertial separation radial vane separators are designed for a limited flow rate range, and there is a trade-off between system efficiency and system restriction within the design flow rate range. If the system is operated at a flow rate above the range, the system restriction can get too high, which can lead to reduced system capacity, which can have consequential deleterious effects, e.g. loss of engine power in engine applications. If the system is operated below the design flow rate range, precleaner efficiency suffers. Typically, the efficiency of the ificantly affects system capacity. Small changes in precleaner efficiency can determine whether capacity targets can be attained.
[0005] In the past, because of the noted narrow range of operability, flow rates outside of design limits may require changing the construction design and re-tooling the precleaner. In one alternative, it is known to swap out or change the inlet radial vane structure or inlet distributor, without changing the remaining precleaner housing and constructions. This partially reduces the cost of re-design and/or re-tooling.
[0006] The present system arose during continuing development efforts in the above technology. In one embodiment, the present system provides further cost reduction in tuning precleaner performance without re-design and re-tooling, and without requiring replacement of the radial vane structure or inlet distributor. In other aspects, particularly cost-effective tuning methodology is enabled providing differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Fig. 1 is an isometric view of an air precleaner in accordance with the disclosure.
[0008] Fig. 2 is an isometric view of a portion of Fig. 1.
[0009] Fig. 3 is like Fig. 2 and shows another embodiment.
[0010] Fig. 4 is an exploded perspective view of the construction of Fig. 3.
[0011] Fig. 5 is like Fig. 3 and shows another embodiment.
[0012] Fig. 6 is an exploded perspective view of the construction of Fig. 5.
[0013] Fig. 7 is like Fig. 3 and shows another embodiment.
[0014] Fig. 8 is an exploded perspective view of the construction of Fig. 7.
[0015] Fig. 9 is like Fig. 3 and shows another embodiment.
[0016] Fig. 10 is an exploded perspective view of the construction of Fig. 9.
DETAILED DESCRIPTION
[0017] Fig. 1 shows an air precleaner 20 for a filter 22 downstream thereof. The precleaner includes a housing 24 having an inlet 26 receiving incoming dirt laden air, vane structure 28 imparting centrifugal force on the air to inertially separate dirt particles therefrom to preclean the air, and an outlet 30 discharging precleaned air, e.g. to downstream filter 22. The precleaner housing has a flowpath therethrough from inlet 28 to outlet 30. A second outlet is provided at 32 for discharging separated contaminant particulate, which outlet 32 may include a one-way valve such as shown in dashed line at 34, all as is known.
[0018] A replaceable insert 36 is removably mounted to the precleaner housing and alters air flow velocity through the precleaner housing by changing the flow area of the flowpath through the precleaner housing. As will be described, the replaceable insert is replaceable with a different insert for the same precleaner housing, with the different insert providing a different flow area through the precleaner housing, enabling a selectable precleaner efficiency vs. restriction trade-off as chosen by a user for a particular application, enabling tuning of precleaner performance by the user for the particular application, and in one desirable embodiment, without having to buy another precleaner housing nor having to re-design nor re-tool the combination. In one embodiment, a series of inserts are provided, each being selectable for removable and replaceable mounting to the precleaner housing and providing differing flow areas of the flowpath through the precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
[0019] Referring to Figs. 2-4, the base precleaner housing 23 is shown in Fig. 2. Inlet 26 is provided by a circular inlet having a central hub 38 and an outer circumferential sidewall 40. The noted vane structure is provided by a plurality of vanes 42 extending radially outwardly from hub 38 to sidewall 40. The sidewall is spaced radially outwardly of the hub by an annular gap therebetween. The air flowpath flows through such annular gap in an annulus, which annulus has a radial width between an inner circumference and an outer circumference, with the outer circumference circumscribing the inner circumference. The noted insert 36, Figs.
3, 4, is disposed at inlet 26 and changes the diameter of at least one of the noted inner and outer circumferences to change the noted flow area by changing the noted radial width of the noted annulus. In one embodiment, insert 36 is at hub 38 and increases the diameter of the noted inner circumference of the flowpath annulus, to reduce the noted radial width of the flowpath annulus. In one embodiment, a series of inserts 36, e.g. inserts 36a, 36b, etc., are provided of increasing diameter providing selectively differing reductions of the noted radial width of the noted flowpath annulus. In one embodiment, the insert is provided by a cap as shown at 36 in Figs. 3,
4. In another embodiment, the insert is provided by a disk as shown at 36c in Figs. 5, 6, which may or may not also include cap 36, as shown in Figs. 7, 8. In a further embodiment, the insert may be provided by a ring 36d, Figs. 9, 10, downstream of the vanes, and which may be provided in combination with any of the above embodiments. In one embodiment, the insert is upstream of the vane structure, Figs. 3-8. In another embodiment, the insert is downstream of the vane structure, Figs. 9, 10. The insert is shown at the noted inlet 26. In other embodiments, the insert may be provided at the outlet. In a further embodiment, the insert is a flexible member downstream of the vane structure, e.g. a flexible ring 36d which may flex to vary the noted flow area.
[0020] The system provides a method for cost-effectively tuning air precleaner performance for a particular application according to user selection for an air precleaner 20 for a filter 22 downstream thereof. The air precleaner includes a precleaner housing 24 having an inlet 26 receiving incoming dirt laden air, vane structure 28 imparting centrifugal force on the air to inertially separate dirt laden particles therefrom to preclean the air, and an outlet 30 discharging precleaned air to the downstream air filter such as 22. The precleaner housing has a flowpath therethrough from inlet 26 to outlet 30. The method includes providing a replaceable insert 36 removably mounted to the precleaner housing and altering air flow velocity through the precleaner housing by changing flow area of the flowpath through the precleaner housing. The method includes replacing the insert with a different insert for the same precleaner housing, with the different insert providing a different flow area through the precleaner housing, to enable tuning of precleaner performance by the user for the particular application. In one embodiment, this is enabled without having to buy another precleaner housing nor having to re-design nor retool the combination. In a further embodiment, a series of inserts are provided, each being selectable for removable and replaceable mounting to the precleaner housing and providing differing flow areas through the precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
[0021] In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be inferred therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. The different configurations, systems, and method steps described herein may be used alone or in combination with other configurations, systems and method steps. It is to be expected that various equivalents, alternatives and modifications are possible within the scope of the appended claims. Each limitation in the appended claims is intended to invoke interpretation under 35 U.S.C. §112, sixth paragraph, only if the terms "means for" or "step for" are explicitly recited in the respective limitation.

Claims

CLAIMS What is claimed is:
1. An air precleaner for a filter downstream thereof, comprising a precleaner housing having an inlet receiving incoming dirt laden air, vane structure imparting centrifugal force on said air to inertially separate dirt particles therefrom to preclean said air, and an outlet discharging precleaned air, said precleaner housing having a flowpath therethrough from said inlet to said outlet, a replaceable insert removably mounted to said precleaner housing and altering air flow velocity through said precleaner housing by changing flow area of said flowpath through said precleaner housing.
2. The air precleaner according to claim 1 wherein said replaceable insert is replaceable with a different insert for the same said precleaner housing, said different insert providing a different flow area through said precleaner housing, enabling a selectable precleaner vs. restriction trade-off as chosen by a user for a particular application, enabling tuning of precleaner performance by said user for said particular application.
3. The air precleaner according to claim 2 wherein said inlet comprises a circular inlet having a central hub and an outer circumferential sidewall, said vane structure comprises a plurality of vanes extending radially outwardly from said hub to said sidewall, said sidewall being radially spaced outwardly of said hub by an annular gap therebetween, said flowpath flowing through said annular gap in an annulus, said annulus having a radial width between an inner circumference and an outer circumference, said outer circumference circumscribing said inner circumference, said insert being disposed at said inlet and changing the diameter of at least one of said inner and outer circumferences to change said flow area by changing said radial width of said annulus.
4. The air precleaner according to claim 3 wherein said insert is at said hub and increases said diameter of said inner circumference to reduce said radial width of said annulus.
5. The air precleaner according to claim 4 comprising a series of said inserts of increasing diameter providing selectively differing reductions of said radial width of said annulus, each of said inserts being selectable for removable and replaceable mounting to said precleaner housing at said inlet at said hub and providing differing flow areas of said flowpath through said precleaner housing to provide differing precleaner efficiency vs. restriction tradeoffs for user selection and concordant tunable precleaner performance.
6. The air precleaner according to claim 2 comprising a series of said inserts each being selectable for removable and replaceable mounting to said precleaner housing and providing differing flow areas of said flowpath through said precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
7. The air precleaner according to claim 6 wherein said insert is selected from at least one of a cap, a disc, and a ring.
8. The air precleaner according to claim 6 wherein said insert is upstream of said vane structure.
9. The air precleaner according to claim 8 wherein said insert is at said inlet.
10. The air precleaner according to claim 6 wherein said insert is downstream of said vane stmcture.
1 1. The air precleaner according to claim 10 wherein said insert is at said outlet.
12. The air precleaner according to claim 2 wherein said insert is a flexible member downstream of said vane structure.
13. A method for cost-effectively tuning air precleaner performance for a particular application according to user selection for an air precleaner for a filter downstream thereof, said air precleaner comprising a precleaner housing having an inlet receiving incoming dirt laden air, vane structure imparting centrifugal force on said air to inertially separate dirt laden particles therefrom to preclean said air, and an outlet discharging precleaned air, said precleaner housing having a flowpath therethrough from said inlet to said outlet, said method comprising providing a replaceable insert removably mounted to said precleaner housing and altering air flow velocity through said precleaner housing by changing flow area of said flowpath through said precleaner housing.
14. The method according to claim 13 comprising replacing said insert with a different insert for the same said precleaner housing, said different insert providing a different flow area through said precleaner housing, to enable tuning of precleaner performance by said user for said particular application, and comprising selecting precleaner vs. restriction trade-off for a particular application according to said enabled tuning.
15. The method according to claim 14 comprising providing a series of said inserts each being selectable for removable and replaceable mounting to said precleaner housing and providing differing flow areas through said precleaner housing to provide differing precleaner efficiency vs. restriction trade-offs for user selection and concordant tunable precleaner performance.
16. The method according to claim 14 comprising providing said inlet as a circular inlet having a central hub and an outer circumferential sidewall, providing said vane structure as a plurality of vanes extending radially outwardly from said hub to said sidewall, said sidewall being radially spaced outwardly of said hub by an annular gap therebetween, said flowpath flowing through said annular gap in an annulus, said annulus having a radial width between an inner circumference and an outer circumference, said outer circumference circumscribing said inner circumference, and comprising disposing said insert at said inlet and changing the diameter of at least one of said inner and outer circumferences to change said flow area by changing the radial width of said annulus.
17. The method according to claim 16 comprising disposing said insert at said hub and increasing said diameter of said inner circumference to reduce said radial width of said annulus.
18. The method according to claim 17 comprising providing a series of said inserts of increasing diameter providing selectively differing reductions of said radial width of said annulus.
PCT/US2011/057732 2011-03-15 2011-10-25 Cost-effective tunable precleaner Ceased WO2012125187A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112011103951.4T DE112011103951B4 (en) 2011-03-15 2011-10-25 Cost effective tunable pre-separator and method for cost effective tuning of air pre-separator performance
CN201180041424.7A CN103068463B (en) 2011-03-15 2011-10-25 Cost-effective adjustable precleaner
BR112013003452A BR112013003452A2 (en) 2011-03-15 2011-10-25 downstream filter air pre-purifier and method for regulating its performance

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201161452667P 2011-03-15 2011-03-15
US61/452,667 2011-03-15
US13/278,363 2011-10-21
US13/278,363 US8951337B2 (en) 2011-03-15 2011-10-21 Cost-effective tunable precleaner

Publications (1)

Publication Number Publication Date
WO2012125187A1 true WO2012125187A1 (en) 2012-09-20

Family

ID=46827401

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/057732 Ceased WO2012125187A1 (en) 2011-03-15 2011-10-25 Cost-effective tunable precleaner

Country Status (5)

Country Link
US (1) US8951337B2 (en)
CN (1) CN103068463B (en)
BR (1) BR112013003452A2 (en)
DE (1) DE112011103951B4 (en)
WO (1) WO2012125187A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9689334B2 (en) 2014-11-14 2017-06-27 Cnh Industrial America Llc Air intake system for an off-road vehicle
US9463409B2 (en) * 2015-02-27 2016-10-11 Tung-Tsai Lee Oil mist filter
US20200318585A1 (en) * 2016-05-13 2020-10-08 Cummins Filtration Ip, Inc. Inertial precleaner with variable aspiration flowrate control via ambient dust concentration sensor input
CN108626831A (en) * 2017-03-17 2018-10-09 韩国科学技术研究院 Air-purifying module and air cleaning unit containing it
WO2019221884A1 (en) * 2018-05-18 2019-11-21 Donaldson Company, Inc. Precleaner arrangement for use in air filtration and methods
US11118545B2 (en) 2019-03-26 2021-09-14 Caterpillar Inc. Precleaner system
US11458428B2 (en) 2021-02-04 2022-10-04 Fca Us Llc Particulate separator for engine air cleaner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6280493B1 (en) * 1999-03-19 2001-08-28 Dreison International, Inc. Air pre-cleaner
US20070234903A1 (en) * 2003-10-17 2007-10-11 Donaldson Company, Inc. Precleaner arrangement for use in air filtration; method; and, air cleaner using same

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1302716A (en) 1918-07-13 1919-05-06 Midwest Engine Company Dust-separator.
US1847452A (en) * 1929-01-12 1932-03-01 Detroit Lubricator Co Air cleaner
US2322414A (en) 1941-04-19 1943-06-22 Bowen William Spencer Venturi dust collector
US2661810A (en) 1949-07-15 1953-12-08 Case Co J I Self-cleaning air precleaner
US3339533A (en) * 1967-01-26 1967-09-05 Nordstrom Per Ingemar Air filter for internal combustion engines
US3566586A (en) 1969-06-09 1971-03-02 Dustmaster Corp Air cleaner for internal combustion engine
US3590560A (en) 1969-07-28 1971-07-06 David B Pall Tubular vortex air cleaner
US3973937A (en) * 1975-04-25 1976-08-10 Petersen Ross K Engine air precleaner
US4048911A (en) 1976-07-29 1977-09-20 Petersen Ross K Air supply apparatus
US4173458A (en) * 1977-02-28 1979-11-06 Stiles Arthur G Air cleaner
US4127396A (en) 1977-07-28 1978-11-28 Halle Industries, Inc. Air pre-cleaner
US4159899A (en) 1977-08-26 1979-07-03 Fram Corporation Precleaner assembly
JPS62237919A (en) * 1986-04-10 1987-10-17 Hisashi Imai Method and device for dust collecting by air current distribution
US5059222A (en) * 1990-09-25 1991-10-22 Smith Daniel R Engine air precleaner
US5320653A (en) 1993-05-20 1994-06-14 Nelson Industries, Inc. Air precleaning apparatus
US6110246A (en) 1998-07-23 2000-08-29 Dreison International, Inc. Air precleaner having stationary vanes and rotating impeller
FI111229B (en) * 2000-02-08 2003-06-30 Fortum Oyj Method and apparatus for separating solids from gases
US7258713B2 (en) 2004-08-27 2007-08-21 Dreison International, Inc. Inlet vane for centrifugal particle separator
DE102005042720B4 (en) * 2004-09-23 2016-09-22 Mahle Filtersysteme Gmbh axial cyclone
CN101230817A (en) * 2007-01-26 2008-07-30 蚌埠金威滤清器有限公司 Air prefilter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6280493B1 (en) * 1999-03-19 2001-08-28 Dreison International, Inc. Air pre-cleaner
US20070234903A1 (en) * 2003-10-17 2007-10-11 Donaldson Company, Inc. Precleaner arrangement for use in air filtration; method; and, air cleaner using same

Also Published As

Publication number Publication date
US8951337B2 (en) 2015-02-10
DE112011103951T5 (en) 2013-08-22
US20120234168A1 (en) 2012-09-20
BR112013003452A2 (en) 2016-06-21
CN103068463A (en) 2013-04-24
CN103068463B (en) 2015-06-24
DE112011103951B4 (en) 2016-09-08

Similar Documents

Publication Publication Date Title
US8951337B2 (en) Cost-effective tunable precleaner
US8784522B2 (en) Air filter system and filter element
JP5690831B2 (en) Filter device and main filter element for filter device
US10138852B2 (en) Air filter element
AU2016200073B2 (en) Versatile compact air precleaner, air cleaning method and disposable air filter cartridge for air precleaner
US9670808B2 (en) Separator and method for separating liquid droplets from an aerosol
WO2009020672A1 (en) High capacity filter
JP6092881B2 (en) Filtration unit
AU2005247861A1 (en) Filter element with off-axis end cap
JP6729285B2 (en) Oil mist separator
JP2011528280A (en) centrifuge
WO2006049758A1 (en) Filter assembly with combination filter element
US12172116B2 (en) Air filter assembly with a permeable baffle
CN106559988A (en) Air filter element
KR101140670B1 (en) Cyclone-bag house equipped with filter protection guide
CN108348928B (en) Splitter
US7258727B2 (en) Apparatus for separating particles from a flowing medium
CA2317891C (en) Liquid filter with centrifugal separator
WO2008111909A1 (en) A particle separator
KR20250103626A (en) Improved pulse filter with integrated support
US5975434A (en) Showerhead system with turbulence inducing and water purification means
US20130008844A1 (en) Fluid Filter
GB2494193A (en) Fluid separation
WO2004041441A1 (en) Arrangement for a centrifugal separator
CN111556781B (en) Crankcase ventilation system with vortex breaker reducing tangential outflow fluid pressure drop

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201180041424.7

Country of ref document: CN

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

Ref document number: 11861298

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1120111039514

Country of ref document: DE

Ref document number: 112011103951

Country of ref document: DE

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112013003452

Country of ref document: BR

122 Ep: pct application non-entry in european phase

Ref document number: 11861298

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 112013003452

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20130214