US20140056701A1 - Fan shroud with complementary two-sided ribbing - Google Patents

Fan shroud with complementary two-sided ribbing Download PDF

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Publication number
US20140056701A1
US20140056701A1 US13/974,859 US201313974859A US2014056701A1 US 20140056701 A1 US20140056701 A1 US 20140056701A1 US 201313974859 A US201313974859 A US 201313974859A US 2014056701 A1 US2014056701 A1 US 2014056701A1
Authority
US
United States
Prior art keywords
rib
fan shroud
height
discontinuity
barrel portion
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.)
Abandoned
Application number
US13/974,859
Other languages
English (en)
Inventor
Mark D. Caplan
F. Raymond Cote
Edward H. Gray
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.)
Robert Bosch GmbH
Robert Bosch LLC
Original Assignee
Robert Bosch GmbH
Robert Bosch LLC
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 Robert Bosch GmbH, Robert Bosch LLC filed Critical Robert Bosch GmbH
Priority to US13/974,859 priority Critical patent/US20140056701A1/en
Assigned to ROBERT BOSCH GMBH, ROBERT BOSCH LLC reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRAY, EDWARD H., CAPLAN, MARK D., COTE, F. RAYMOND
Publication of US20140056701A1 publication Critical patent/US20140056701A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Definitions

  • the present invention relates to structural ribbing for stiffening thin panels, such as those found in plastic shrouds (e.g., a plenum portion of an engine-cooling fan shroud).
  • the purpose of the ribbing is to strengthen and stiffen the underlying panel structure. When a rib is reduced in height or depth (transverse to the panel), its stiffness is reduced. It is often desirable to avoid abrupt changes in stiffness because they create regions where the part can be relatively easily flexed or deformed compared to surrounding areas with higher stiffness. Furthermore, abrupt stiffness transitions generally lead to stresses and deflection higher than they would otherwise be if the rib height transition were more gradual. In certain environments, such as vehicle engine compartments where packaging space can be very limited, structural ribbing may be compromised by an adjacent under hood item(s) that interferes with the desired structural ribbing. This can lead to an undesirable trade-off between size and mechanical strength.
  • the invention provides a fan shroud having a panel including a first surface and a second surface substantially opposite the first surface.
  • a first rib extends substantially perpendicularly from the first surface, the first rib having an area of discontinuity where a height of the first rib is reduced.
  • a second rib extends substantially perpendicularly from the second surface. The second rib is substantially aligned with the first rib and positioned substantially opposite the area of discontinuity of the first rib.
  • the invention provides a fan shroud including a generally cylindrical barrel portion having an opening configured to receive a fan.
  • a plenum portion adjacent the barrel portion defines an exterior surface and an interior surface opposite the exterior surface.
  • a first rib extends substantially perpendicularly from the exterior surface and defines a path between the barrel portion and an outer edge of the plenum portion.
  • a second rib extends substantially perpendicularly from the interior surface. The second rib does not extend from the barrel portion to the outer edge, but extends substantially along the path defined by the first rib, substantially opposite an area of discontinuity in the first rib.
  • the invention provides a fan shroud having a panel including a first surface and a second surface substantially opposite the first surface.
  • a first rib extends substantially perpendicularly from the first surface, the first rib having a portion of decreasing height corresponding to a decreased stiffening effect of the first rib.
  • a second rib is positioned on the second surface substantially opposite the portion of decreasing height to compensate for the decreased stiffening effect of the first rib.
  • FIG. 1 is a perspective view of a ribbed panel, embodied as a plenum portion of an engine cooling fan shroud, according to one aspect of the invention.
  • FIG. 2 is an alternate perspective view of a first side of the ribbed panel shown in FIG. 1 .
  • FIG. 3 is a perspective view of a second opposite side of the ribbed panel shown in FIGS. 1-2 .
  • FIG. 4 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIG. 5 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIG. 6 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIG. 7 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIG. 8 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIG. 9 is a cross-section view of a ribbed panel according to another construction of the invention.
  • FIGS. 1-3 illustrate a fan shroud 10 including a panel 20 having a first side or surface 24 and a second side or surface 28 opposite the first side 24 .
  • the panel 20 forms a plenum portion of the fan shroud 10 , which can be a shroud for an engine-cooling fan assembly, which is commonly positioned adjacent a radiator in the engine bay of an automobile.
  • the fan shroud 10 further includes a cylindrical barrel portion 32 projecting from the first side 24 and configured to receive a fan (not shown).
  • the first side 24 can be an exterior or exposed side (e.g., facing rearward toward an engine), and the second side 28 can be an interior or concealed side (e.g., positioned against a radiator).
  • the second side 28 is generally concave, forming a hollowed-out area. Side surfaces 34 extended from the first side 24 and projecting from the second side 28 form or bound the hollowed-out area of the second side 28 .
  • the panel 20 includes a plurality of mounting structures or coupling portions 36 to secure the fan shroud 10 within its environment. Although the illustrated coupling portions 36 are generally positioned about a periphery or outer edge of the panel 20 , and may be particularly adapted for use within an automobile application of the fan shroud 10 , other coupling arrangements or mounting structures are contemplated, along with other applications of the fan shroud 10 .
  • the panel 20 includes a plurality of ribs 41 , 42 , 43 , 44 , 45 formed on the first or exterior side 24 .
  • Two of the ribs 41 , 42 form a first rib pair extending from the barrel portion 32 toward one of the coupling portions 36 .
  • Another two of the ribs 43 , 44 form a second rib pair also extending from the barrel portion 32 toward another one of the coupling portions 36 .
  • the rib 45 also extends from the barrel portion 32 toward the same coupling portion 36 as the second rib pair 43 , 44 .
  • the rib 45 is coupled with the adjacent rib 44 via a connector rib portion 46 .
  • Other constructions and orientations are contemplated.
  • the rib 45 is a discontinuous rib, which does not span across the panel 20 and does not span between two structural connection points (e.g., points of significant thickness increase over the nominal panel thickness, such as the barrel portion 32 and the coupling portions 36 ) on the first side 24 of the panel 20 .
  • the rib 45 is formed of two rib segments 45 A, 45 B that are aligned with each other, but not co-extensive as the rib segments 45 A, 45 B have facing ends 45 E that each terminate into the first surface 24 before reaching each other.
  • a smooth transition occurs from the maximum height of each of the rib segments 45 A, 45 B to a height of zero where the rib segments 45 A, 45 B terminate into the first surface 24 at the facing ends 45 E.
  • the outer end of the first rib segment 45 A is directly integrated with the connector ribbing portion 46 and the coupling portion 36 to extend therefrom.
  • the outer end of the second rib segment 45 B is directly integrated with the barrel portion 32 to extend outwardly therefrom.
  • the rib 45 extends substantially radially outward from the barrel portion 32 in that it extends from the barrel portion 32 to become increasingly distant from the barrel portion 32 and its axis, which is the fan axis.
  • the height of the rib 45 may be only partially reduced between the rib segments 45 A, 45 B. Whether the rib 45 is completely segmented into two separate rib segments 45 A, 45 B as shown or partially segmented by a section of significantly reduced height, the overall strength and rigidity provided by the rib 45 is reduced. Typically, the area of height reduction (or rib elimination) between the rib segments 45 A, 45 B is provided as a necessary means to avoid physical interference between components mounted adjacent the panel 20 . For example, as presented as part of the engine-cooling fan shroud 10 for an automobile, the panel 20 may be mounted in a tight space next to moving or stationary engine components, electrical wiring, hoses, mounts for accessories, a hood latch, etc.
  • a complementary rib 50 is provided on the second surface 28 as shown in FIG. 1 (where the panel surface 24 is rendered transparent) and FIG. 3 .
  • the complementary rib 50 is aligned with the discontinuous rib 45 that projects from the first surface 24 and is positioned in the area of the discontinuity.
  • the complementary rib 50 functions as a “bridge” to maintain structural continuity across the discontinuity or reduced-height section of the rib 45 on the first side 24 .
  • aligned it is meant that the complementary rib 50 substantially follows a path established or defined by the discontinuous rib 45 , as opposed to the complementary rib 50 defining its own separate path that establishes a different strengthening direction.
  • the complementary rib 50 would generally form an extension of the first rib 45 in the area of discontinuity.
  • the ribs 45 , 50 need not be linear to be aligned, so long as they cooperate to form a consistent or complementary path of extension.
  • the complementary rib 50 can be of the same height as the discontinuous rib 45 , or larger, or smaller as illustrated.
  • the complementary rib 50 is a standalone structure, or partial rib, which does not span across the panel 20 and does not span between two structural connection points on the second side 28 of the panel 20 .
  • the complementary rib 50 has two opposed ends 50 E, each of which terminates into the second surface 28 .
  • the height of the complementary rib 50 smoothly transitions from maximum height to zero height where the rib 50 terminates into the second surface 28 at each of the opposed ends 50 E.
  • the areas of height transition adjacent the ends 50 E of the complementary rib 50 can overlap with the areas of height transition adjacent the ends 45 E of each of the respective rib portions 45 A, 45 B such that they directly overlie each other on opposite sides of the panel 20 as shown in FIG. 1 .
  • other arrangements may also be employed.
  • a panel can be provided with a discontinuous rib having a single rib portion, where the panel further includes a complementary rib on the opposite side, with features otherwise similar to the illustrated construction described above.
  • the first rib and the second, complementary rib are discontinuous in that neither in itself spans between two structural connection points, but together, they do.
  • the addition of the complementary rib 50 to the interior of the panel 20 in the plenum portion of the fan shroud 10 provides a significant benefit in achieving high strength with great packaging flexibility. Furthermore, because the complementary rib 50 extends substantially radially outward with respect to the barrel portion 32 (and subsequently, the fan axis), it does not unduly restrict the air flow through the fan shroud 10 , and particularly does not unduly restrict the air flow within the plenum portion defined by the panel 20 .
  • the fan shroud 10 can be a molded plastic panel in which all of the features shown, including the panel 10 with all of the ribs are integrally formed as a single piece.
  • the invention is not necessarily limited to such a construction, as it may be successfully applied to other constructions as well.
  • FIGS. 4-9 illustrate additional constructions of panels with particular arrangements of complementary ribs generally conforming to the above description.
  • the panel 20 includes a discontinuous rib formed by respective rib portions 45 A, 45 B on the first side 24 that are disconnected from each other, leaving a gap therebetween. In this gap, there is no ribbing on the first side 24 . Rather, a complementary rib 50 on the second side 28 is positioned to span the gap, overlapping with both of the rib portions 45 A, 45 B on the first side 24 .
  • the complementary rib 50 is substantially aligned with the rib portions 45 A, 45 B.
  • each of the rib portions 45 A, 45 B has a distal end that is connected or integrated with a structural connection point (e.g., an upstanding wall portion at each end extending outward in a common direction from the central panel portion).
  • the panel 20 includes a discontinuous rib formed by respective rib portions 45 A, 45 B on the first side 24 that are disconnected from each other, leaving a gap therebetween. In this gap, there is no ribbing on the first side 24 . Rather, a complementary rib 50 on the second side 28 is positioned to span the gap, overlapping with both of the rib portions 45 A, 45 B on the first side 24 . Although not able to be shown in the cross-sectional view, the complementary rib 50 is substantially aligned with the rib portions 45 A, 45 B.
  • the rib portion 45 B on the right has a distal end that is connected or integrated with a structural connection point (e.g., an upstanding wall portion extending outward from the central panel portion).
  • the rib portion 45 A on the left tapers down in height toward the outer edge of the panel 20 .
  • FIGS. 6-9 illustrate constructions in which a single discontinuous rib portion 45 on the first side 24 of the panel 20 is complemented by a rib 50 on the second side 28 of the panel 20 .
  • the rib portion 45 has a substantially uniform height from one end toward a central portion of the panel 20 at which the height abruptly drops to zero and the rib portion 45 terminates.
  • the complementary rib 50 on the second side 28 is substantially aligned with the rib portion 45 and overlaps with the rib portion 45 .
  • the complementary rib 50 has a substantially uniform height from one end toward the central portion of the panel 20 at which the height abruptly drops to zero, but not before extending past the point of termination of the rib portion 45 to lie across from the full-height portion of the rib 45 .
  • the rib portion 45 on the first side 24 spans substantially across the panel 20 , but has a non-uniform height that increases continuously from a minimum (e.g., zero) at one end to a maximum at the other end.
  • the complementary rib 50 on the second side 28 is substantially aligned with the rib portion 45 and overlaps with the rib portion 45 along substantially an entire length of the rib portion 45 .
  • the complementary rib 50 has a non-uniform height that increases continuously from a minimum (e.g., zero) at one end to a maximum at the other end.
  • the orientation of the height increase in the complementary rib 50 is opposite that of the rib 45 , and the maximum heights of each are approximately equal.
  • the combined height of the ribs 45 , 50 is substantially equal at any given point across the panel 20 so that the complementary rib 50 completely offsets the loss in stiffening ability presented by the decreased height in the rib portion 45 .
  • the arrangement of the ribs 45 , 50 is substantially identical to that of FIG. 7 , except that the complementary rib 50 does not have a maximum height matching that of the rib portion 45 on the first side 24 .
  • the complementary rib 50 overlaps an area of discontinuity in the rib portion 45 where the height is reduced, such that the complementary rib 50 at least partially offsets the loss in stiffening ability presented by the decreased height in the rib portion 45 .
  • the complementary rib 50 may not overlap the entire rib portion 45 all the way across the panel 20 as shown.
  • the rib portion 45 has a substantially uniform height from one end toward a central portion of the panel 20 at which the height decreases (e.g., the height transitions to zero and the rib portion 45 terminates).
  • the complementary rib 50 on the second side 28 is substantially aligned with the rib portion 45 and has a substantially uniform height from one end toward the central portion of the panel 20 at which the height decreases (e.g., the height transitions to zero).
  • the height transitioning portion of the complementary rib 50 overlaps with the height transitioning portion of the rib portion 45 so that, similar to FIG. 7 , the combined height of the ribs 45 , 50 is substantially equal at any given point across the panel 20 and the complementary rib 50 completely offsets the loss in stiffening ability presented by the decreased height in the rib portion 45 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Body Structure For Vehicles (AREA)
US13/974,859 2012-08-24 2013-08-23 Fan shroud with complementary two-sided ribbing Abandoned US20140056701A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/974,859 US20140056701A1 (en) 2012-08-24 2013-08-23 Fan shroud with complementary two-sided ribbing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261692874P 2012-08-24 2012-08-24
US13/974,859 US20140056701A1 (en) 2012-08-24 2013-08-23 Fan shroud with complementary two-sided ribbing

Publications (1)

Publication Number Publication Date
US20140056701A1 true US20140056701A1 (en) 2014-02-27

Family

ID=49118800

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/974,859 Abandoned US20140056701A1 (en) 2012-08-24 2013-08-23 Fan shroud with complementary two-sided ribbing

Country Status (6)

Country Link
US (1) US20140056701A1 (fr)
KR (1) KR20150046184A (fr)
CN (1) CN104854352A (fr)
BR (1) BR112015003902A2 (fr)
DE (1) DE112013004165T5 (fr)
WO (1) WO2014031994A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160120098A1 (en) * 2014-11-04 2016-05-05 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20180134504A1 (en) * 2016-02-29 2018-05-17 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20180202450A1 (en) * 2015-06-08 2018-07-19 Air Distribution Technologies Ip, Llc Fan inlet recirculation guide vanes
US20250116757A1 (en) * 2022-01-27 2025-04-10 BSH Hausgeräte GmbH Mobile, self-propelled device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101798574B1 (ko) * 2016-05-02 2017-11-17 동부대우전자 주식회사 방열용 송풍기 및 이를 포함하는 냉장고

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110273038A1 (en) * 2010-05-07 2011-11-10 Robert Bosch Gmbh Motor ring and splash shield arrangement for a fan assembly

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DE29822121U1 (de) * 1997-12-24 1999-02-18 Papst-Motoren GmbH & Co. KG, 78112 St Georgen Abdeckung für einen Lüfter
JP4618077B2 (ja) * 2005-09-27 2011-01-26 株式会社デンソー 冷却ファンおよび送風機
JP2007218101A (ja) * 2006-02-14 2007-08-30 Nippon Densan Corp 軸流ファンのハウジングおよび軸流ファン
RU2366839C1 (ru) * 2008-03-19 2009-09-10 Закрытое акционерное общество КИРАСА Защитная оболочка корпуса вентилятора авиационного газотурбинного двигателя и способ ее изготовления
CN201891631U (zh) * 2010-12-04 2011-07-06 上海德惠特种风机有限公司 一种风机

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110273038A1 (en) * 2010-05-07 2011-11-10 Robert Bosch Gmbh Motor ring and splash shield arrangement for a fan assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160120098A1 (en) * 2014-11-04 2016-05-05 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10306825B2 (en) * 2014-11-04 2019-06-04 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10820482B2 (en) 2014-11-04 2020-11-03 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10827668B2 (en) 2014-11-04 2020-11-10 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20180202450A1 (en) * 2015-06-08 2018-07-19 Air Distribution Technologies Ip, Llc Fan inlet recirculation guide vanes
US20180134504A1 (en) * 2016-02-29 2018-05-17 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10676291B2 (en) * 2016-02-29 2020-06-09 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10899561B2 (en) 2016-02-29 2021-01-26 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10994952B2 (en) 2016-02-29 2021-05-04 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20250116757A1 (en) * 2022-01-27 2025-04-10 BSH Hausgeräte GmbH Mobile, self-propelled device

Also Published As

Publication number Publication date
CN104854352A (zh) 2015-08-19
WO2014031994A2 (fr) 2014-02-27
WO2014031994A3 (fr) 2014-07-10
DE112013004165T5 (de) 2015-05-07
KR20150046184A (ko) 2015-04-29
BR112015003902A2 (pt) 2017-07-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAPLAN, MARK D.;COTE, F. RAYMOND;GRAY, EDWARD H.;SIGNING DATES FROM 20131125 TO 20131126;REEL/FRAME:031675/0967

Owner name: ROBERT BOSCH LLC, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAPLAN, MARK D.;COTE, F. RAYMOND;GRAY, EDWARD H.;SIGNING DATES FROM 20131125 TO 20131126;REEL/FRAME:031675/0967

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION