CA2365932A1 - Nozzle for an upblast fan - Google Patents
Nozzle for an upblast fan Download PDFInfo
- Publication number
- CA2365932A1 CA2365932A1 CA 2365932 CA2365932A CA2365932A1 CA 2365932 A1 CA2365932 A1 CA 2365932A1 CA 2365932 CA2365932 CA 2365932 CA 2365932 A CA2365932 A CA 2365932A CA 2365932 A1 CA2365932 A1 CA 2365932A1
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- Prior art keywords
- body member
- tubular body
- extending
- cap
- central portion
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Description
NOZZLE FOR AN UPBLAST FAN
FiEI_D OF THE INVENT10N
[0001 ] The present invention relates to the field of upblast fans, and more particularly, to a nozzle for an upblast fan.
BACKGROUND OF THE INVENTION
FiEI_D OF THE INVENT10N
[0001 ] The present invention relates to the field of upblast fans, and more particularly, to a nozzle for an upblast fan.
BACKGROUND OF THE INVENTION
[0002] Many exhaust gases are noxious. Accordingly, it is desirable, when constructing exhaust systems, for buildings or the like, to attempt to ensure that exliaust gases do not persist at low altitudes, but instead travel upwardly, into the atmosphere.
(0003] Tali exhaust stacks can be highly efFective in this regard, even in the context of exhaust gases exiting therefrom at relatively low velocities. However; tall exhaust stacks are relatively costly and difficult to construct. Moreover, same are unsightly, and can also exceed height restrictions imposed under zoning by Jaws.
(0004] Accordingly, it has been attempted to approximate the performance of tall stacks by the use of upblast fans, which exhaust gases at high velocity through relatively short stacks of conventional construction. However, such structures have proven deficient in terms of their ability to propel exhaust gases upwardly into the atmosphere. It has been found, foi- example, that atmospheric currents can create eddies adjacent to building rooflines, which can entrain gases exhausted from conventional short stacks even when exiting. at relatively high velocities.
(0005] One class of upblast fan which can be relatively effective in the propulsion of exhaust gases upwardly into the atmosphere is characterized by a radial fan which exhausts into a bifurcated nozzle defining opposed flow chambers; each being substantially arcuate in horizontal cross-section and collectively tapering.
upwardly to an outlet, with a passive zone chamber defined between said chambers that is open to the atmosphere. The structures described in United States Patent No. 4,806,076 (Andrews), issued February 21, 1989; United States Patent No. 5,439,349 (Kupferberg), issued August 8, 1995; and United States Patent No. 6,112,850 (Secrest et al.), issued September 5, 2000, are all exemplary of this class.
(0006 It is an object of the present invention to provide a novel nozzle for an upblast fan which provides for the propulsion of exhaust gases upwardly into the atmosphere.
(000'T1 This object is addressed by the present invention comprising, a new nozzle for an upblast fan having a tubular body member forming an exhaust passage. The body member defines an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perperxficular to the medial plane.
The tubular body member is comprised of a pair of flared portions spaced-apart from one another on opposite sides of the lateral plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching the passage from the first end to the second end.
[0008] Preferably, the nozzle further comprises an annular cap connected .to the body member, the cap being disposed. about and in spaced, subsfantially coaxial relation to the second end of the body member and having a cap inlet located towards the first end of the body member and a cap outlet located relatively distal to the first end of the body member. According to another aspect of the invention, an exhaust gas nozzle comprises.a tubular body member extending between an open first end and an open second end and forming a single exhaust passage that extends between said first and second ends, elongate longitudinal channels being formed on opposite sides of said tubular member and on an exterior surface of said tubular member, said channels extending to said second end and being open at said second end, wherein said , channels gradually restrict said passage towards said second end. An annular cap is connected to said tubular body member, said cap. being disposed about and in spaced, substantially coaxial relation to said second end of said tubular body member and having a cap inlet for atmospheric air located below said second end and a cap outlet located substantially above said second end of the tubular body member.
[0009] Other advantages, features and characteristics of the present invention, as well as methods of operation and functions of the related elements of the structure, will become more apparent upon consideration of the following detailed description with reference to the accompanying drawings, the latter of which is briefly described hereinbelow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIGURE 1 is a perspective view of a nozzle according to a preferred embodiment of the present invention, operatively mounted to a radial fan apparatus;
[0011] FIGURE 2 is a perspective view of a part of the nozzle of FIGURE 1 j0012] FIGURE 3.is a side view along the medial plane of the structure of FIGURE 2;
j0013] FIGURE 4 is a side view along the lateral plane of the structure of FIGURE 2;
j0014] FIGURE 5 is a top plan view of the structure of FIGURE 2;
j0015] FIGURE 6 is a side view parallel to the medial plane of the structure of FIGURE 1; and j0016] FIGURE 7 is a side view parallel to the lateral plane of the structure of FIGURE 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
j001Tj With reference to FIGURE 1, a preferred embodiment of the present invention, an. exhaust gas nozzle 20, is illustrated.
j0018] The nozzle 20 of the preferred embodiment will be seen to comprise a tubular body member 22 and an annular cap 24.
j0019] As best indicated in FIGURE 2, the body member 22 defines an open first end 26, an open second end 28 and a centrally-disposed longitudinal axis A
extending between the first end 26 and the second end 28. A medial plane M parallel to and intersecting the longitudinal axis A is also defined by the body member 22, as is a c2ntrai lateral plane L parallel to and intersecting the longitudinal axis A
and arranged perpendicular to the medial plane M, as illustrated in FIGURES 3, 4 and 5.
When viewed along the lateral plane L in a direction normal to the longitudinal axis A, the body member 22 tapers in profile from the first end 26 to the second end 28, as seen in FIGURE 4.
[0020] As best seen in FIGURES 2 and 5, the body member 22 generally comprises a pair of flared portions 30 spaced-apart from one another on opposite sides of the lateral plane L; a pair of sidewall portions 32, spaced-apart from one another on opposite sides of medial plane M, each sidewall portion 32 being spaced laterally outwardly from the pair of flared portions 30; and a pair of transition portions 34 for each sidewall portion 32, each of the pair of transition portions 34 connecting said each sidewall portion 32 to a respective one of the pair of flared portions 30. In such manner, the flared portions 30, the sidewail portions 32 and the transition portions 34 collectively define a passage 36 for the flow of gases between the first end 26 and the second end 28.
[0021] The flared portions 30 extend from the first end 26 to the second end 28 and gradually pinch the passage and define therebetween a flow restriction 38 in the passage 36, as indicated in FIGURE 2.
(0022] Each flared portion 30 comprises a substantially planar central portion extending from the first end 26 to the second end 28, aligned substantially normal to the medial plane M.
[0023] The central portion 40 has and is defined by a first end 45 defined by the first end 26 of the body member 22; a' second end 47 defined by the second end 28 of the body member 22; a pair of sides 46, each extending from the first end 45 of the central portion 40 to the second end 47 of the central portion 40 and progressively nearing one another. A substantially planar front face 42 extends between the sides 46 of the central portion 40 and between the first end 45 of the central portion 40 and the second end 47.
A substantially planar rear face 44 is disposed interioriy from the front face 42, is parallel therewith, and extends between the sides 46 of the central portion 40 and between the first end 45 and the second end 47. The central portion 40 has a lip 48 formed therein at the second end 47 thereof, this lip 48 having a concave exterior surface 50 and a convex interior surface 52.
[0024] Each flared portion 30 also comprises a pair of elongate perimeter portions 54 bounding the central portion 40 at the sides 46 thereof and each extending from the first.
end 26 of the body member 22 to the second end 26. Each perimeter portion 54 has a first end 62 defined by the first end 26 of the body member 22 and; a second end.64 defined by the second end 28 of the body member 22. A pair of sides 60 extend from the second end 64 of the perimeter portion 54 to the first end 62 of the perimeter portion 54 and taper towards one another in a downward direction. A concave exterior face 56 extends between the sides 60 of the perimeter portion 54. and between the first end 62 of the perimeter portion 54 and the second end 64. A convex iriterior face 58 disposed interioriy from the exterior face 56 extends between the sides 60 of the perimeter portion 54 ancJ between the first end 62 of the perimeter portion 54 and the second end 64. The pair of perimeter portions 54 extend horizontally from the central portion 40 and then tum outwardly away from the central lateral plane L.
[0025] As best seen in FIGURE 5, the aforementioned sidewall portions 32 each extend from the first end 26 to~the second end 28 and intersect the lateral plane L in substantially linear relation to define a respective axis AA aligned substantially parallel to the longitudinal axis L. The sidewall portions 32 each have an inner side 66 and an outer side 68. The inner side 66 is substantially planar and parallel to the medial plane M at the first end 26, and becomes progressively and increasingly concave as the sidewall portion 32 extends towards the second end 28. The outer side 68 is also substantially planar and parallel to the medial plane M at the first end 26, and becomes progressively and increasingly convex as the sidewall portion 32 extends towards the second end 28.
[0028] Each transition portion 34 has a concave inside surface 70 and a convex outside surface 72 and is shaped and dimensioned to define, in combination with the sidewall portions 32 and the flared portions 30, a smoothly contoured interior surface 104 of the body member 22, and a smoothly contoured exterior surface 106 of the body member 22.
upwardly to an outlet, with a passive zone chamber defined between said chambers that is open to the atmosphere. The structures described in United States Patent No. 4,806,076 (Andrews), issued February 21, 1989; United States Patent No. 5,439,349 (Kupferberg), issued August 8, 1995; and United States Patent No. 6,112,850 (Secrest et al.), issued September 5, 2000, are all exemplary of this class.
(0006 It is an object of the present invention to provide a novel nozzle for an upblast fan which provides for the propulsion of exhaust gases upwardly into the atmosphere.
(000'T1 This object is addressed by the present invention comprising, a new nozzle for an upblast fan having a tubular body member forming an exhaust passage. The body member defines an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perperxficular to the medial plane.
The tubular body member is comprised of a pair of flared portions spaced-apart from one another on opposite sides of the lateral plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching the passage from the first end to the second end.
[0008] Preferably, the nozzle further comprises an annular cap connected .to the body member, the cap being disposed. about and in spaced, subsfantially coaxial relation to the second end of the body member and having a cap inlet located towards the first end of the body member and a cap outlet located relatively distal to the first end of the body member. According to another aspect of the invention, an exhaust gas nozzle comprises.a tubular body member extending between an open first end and an open second end and forming a single exhaust passage that extends between said first and second ends, elongate longitudinal channels being formed on opposite sides of said tubular member and on an exterior surface of said tubular member, said channels extending to said second end and being open at said second end, wherein said , channels gradually restrict said passage towards said second end. An annular cap is connected to said tubular body member, said cap. being disposed about and in spaced, substantially coaxial relation to said second end of said tubular body member and having a cap inlet for atmospheric air located below said second end and a cap outlet located substantially above said second end of the tubular body member.
[0009] Other advantages, features and characteristics of the present invention, as well as methods of operation and functions of the related elements of the structure, will become more apparent upon consideration of the following detailed description with reference to the accompanying drawings, the latter of which is briefly described hereinbelow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIGURE 1 is a perspective view of a nozzle according to a preferred embodiment of the present invention, operatively mounted to a radial fan apparatus;
[0011] FIGURE 2 is a perspective view of a part of the nozzle of FIGURE 1 j0012] FIGURE 3.is a side view along the medial plane of the structure of FIGURE 2;
j0013] FIGURE 4 is a side view along the lateral plane of the structure of FIGURE 2;
j0014] FIGURE 5 is a top plan view of the structure of FIGURE 2;
j0015] FIGURE 6 is a side view parallel to the medial plane of the structure of FIGURE 1; and j0016] FIGURE 7 is a side view parallel to the lateral plane of the structure of FIGURE 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
j001Tj With reference to FIGURE 1, a preferred embodiment of the present invention, an. exhaust gas nozzle 20, is illustrated.
j0018] The nozzle 20 of the preferred embodiment will be seen to comprise a tubular body member 22 and an annular cap 24.
j0019] As best indicated in FIGURE 2, the body member 22 defines an open first end 26, an open second end 28 and a centrally-disposed longitudinal axis A
extending between the first end 26 and the second end 28. A medial plane M parallel to and intersecting the longitudinal axis A is also defined by the body member 22, as is a c2ntrai lateral plane L parallel to and intersecting the longitudinal axis A
and arranged perpendicular to the medial plane M, as illustrated in FIGURES 3, 4 and 5.
When viewed along the lateral plane L in a direction normal to the longitudinal axis A, the body member 22 tapers in profile from the first end 26 to the second end 28, as seen in FIGURE 4.
[0020] As best seen in FIGURES 2 and 5, the body member 22 generally comprises a pair of flared portions 30 spaced-apart from one another on opposite sides of the lateral plane L; a pair of sidewall portions 32, spaced-apart from one another on opposite sides of medial plane M, each sidewall portion 32 being spaced laterally outwardly from the pair of flared portions 30; and a pair of transition portions 34 for each sidewall portion 32, each of the pair of transition portions 34 connecting said each sidewall portion 32 to a respective one of the pair of flared portions 30. In such manner, the flared portions 30, the sidewail portions 32 and the transition portions 34 collectively define a passage 36 for the flow of gases between the first end 26 and the second end 28.
[0021] The flared portions 30 extend from the first end 26 to the second end 28 and gradually pinch the passage and define therebetween a flow restriction 38 in the passage 36, as indicated in FIGURE 2.
(0022] Each flared portion 30 comprises a substantially planar central portion extending from the first end 26 to the second end 28, aligned substantially normal to the medial plane M.
[0023] The central portion 40 has and is defined by a first end 45 defined by the first end 26 of the body member 22; a' second end 47 defined by the second end 28 of the body member 22; a pair of sides 46, each extending from the first end 45 of the central portion 40 to the second end 47 of the central portion 40 and progressively nearing one another. A substantially planar front face 42 extends between the sides 46 of the central portion 40 and between the first end 45 of the central portion 40 and the second end 47.
A substantially planar rear face 44 is disposed interioriy from the front face 42, is parallel therewith, and extends between the sides 46 of the central portion 40 and between the first end 45 and the second end 47. The central portion 40 has a lip 48 formed therein at the second end 47 thereof, this lip 48 having a concave exterior surface 50 and a convex interior surface 52.
[0024] Each flared portion 30 also comprises a pair of elongate perimeter portions 54 bounding the central portion 40 at the sides 46 thereof and each extending from the first.
end 26 of the body member 22 to the second end 26. Each perimeter portion 54 has a first end 62 defined by the first end 26 of the body member 22 and; a second end.64 defined by the second end 28 of the body member 22. A pair of sides 60 extend from the second end 64 of the perimeter portion 54 to the first end 62 of the perimeter portion 54 and taper towards one another in a downward direction. A concave exterior face 56 extends between the sides 60 of the perimeter portion 54. and between the first end 62 of the perimeter portion 54 and the second end 64. A convex iriterior face 58 disposed interioriy from the exterior face 56 extends between the sides 60 of the perimeter portion 54 ancJ between the first end 62 of the perimeter portion 54 and the second end 64. The pair of perimeter portions 54 extend horizontally from the central portion 40 and then tum outwardly away from the central lateral plane L.
[0025] As best seen in FIGURE 5, the aforementioned sidewall portions 32 each extend from the first end 26 to~the second end 28 and intersect the lateral plane L in substantially linear relation to define a respective axis AA aligned substantially parallel to the longitudinal axis L. The sidewall portions 32 each have an inner side 66 and an outer side 68. The inner side 66 is substantially planar and parallel to the medial plane M at the first end 26, and becomes progressively and increasingly concave as the sidewall portion 32 extends towards the second end 28. The outer side 68 is also substantially planar and parallel to the medial plane M at the first end 26, and becomes progressively and increasingly convex as the sidewall portion 32 extends towards the second end 28.
[0028] Each transition portion 34 has a concave inside surface 70 and a convex outside surface 72 and is shaped and dimensioned to define, in combination with the sidewall portions 32 and the flared portions 30, a smoothly contoured interior surface 104 of the body member 22, and a smoothly contoured exterior surface 106 of the body member 22.
[0027] The cap 24 is connected to the body member 22 by brackets 74 and is disposed about and in spaced substantially coaxial relation to the second end 28 of the body member 22, as best indicated in FIGURES 1 and 2. The cap 24 has a cap inlet 76 disposed towards the first end 26 of the body member 22, and a cap outlet 78 relatively distal to the first end 26 of the body member 22, 'and is substantially frustoconicai in shape, tapering in diameter towards the cap outlet 78.
(0028]. In FIGURES 1, 6 and 7, the prefen-ed embodiment of the present invention is illustrated, along with a fan apparatus 80. The fan apparatus 80 includes a fan housing 82 defining a fan inlet 84 to receive gas to be exhausted and a fan outlet 86 to expel gas to be exhausted, as best indicated in FIGURE 6. Also provided is a radial fari 88, positioned within the fan housing 82 and adapted to draw exhaust gas in through the fan inlet 84 and to expel this gas out through the fan outlet 86. The radial fan 88 is connected to and driven by an external motor 102.
(0029] In use, the open first end 26 of the body member 22 is connected in sealed fluid communication with the fan outlet 86, such that gas drawn in through the fan inlet 84 is expelled through the fan outlet 86 as aforedescribed and thence through the nozzle 20 and thus propelled upwardly into the atmosphere as shown by arnow 93.
Such action causes ambient air to be induced into the cap 24 as shown by arrows 90 to mix with the exhaust gases and therefore to dilute same as it is propelled upwardly.
[0030] As illustrated in FIGURE 2, 3, 4 and 5, the preferred body member 22 is formed in two-part construction, comprising two parts 22A and 228 connected to one another by means of mating flanges 94 provided on each part 22A, 22B which are joined by nut and bolt assemblies 96. A similar flange 98 is provided at the first end. of the body member 22, which, in use, is joined by nut and bolt assemblies 96 to a mating flange 100 provided on the fan housing 82.
(0028]. In FIGURES 1, 6 and 7, the prefen-ed embodiment of the present invention is illustrated, along with a fan apparatus 80. The fan apparatus 80 includes a fan housing 82 defining a fan inlet 84 to receive gas to be exhausted and a fan outlet 86 to expel gas to be exhausted, as best indicated in FIGURE 6. Also provided is a radial fari 88, positioned within the fan housing 82 and adapted to draw exhaust gas in through the fan inlet 84 and to expel this gas out through the fan outlet 86. The radial fan 88 is connected to and driven by an external motor 102.
(0029] In use, the open first end 26 of the body member 22 is connected in sealed fluid communication with the fan outlet 86, such that gas drawn in through the fan inlet 84 is expelled through the fan outlet 86 as aforedescribed and thence through the nozzle 20 and thus propelled upwardly into the atmosphere as shown by arnow 93.
Such action causes ambient air to be induced into the cap 24 as shown by arrows 90 to mix with the exhaust gases and therefore to dilute same as it is propelled upwardly.
[0030] As illustrated in FIGURE 2, 3, 4 and 5, the preferred body member 22 is formed in two-part construction, comprising two parts 22A and 228 connected to one another by means of mating flanges 94 provided on each part 22A, 22B which are joined by nut and bolt assemblies 96. A similar flange 98 is provided at the first end. of the body member 22, which, in use, is joined by nut and bolt assemblies 96 to a mating flange 100 provided on the fan housing 82.
_. _... . . ..... . . _.._.. .. _. ... _........ .~ 02365932 2001-12-17 .. . _ .. __._.. __ ._ . ........_ .._......_......
[Q031~ Finally, it is to be understood that while but a single embodiment of the present invention is herein shown and described, it will be understood that various changes in size and shape of parts can be made. For example, only, while the nozzle of the present invention is shown in use w~h a radial fan driven by an external motor, it will be evident that other fan mechanisms, including fan mechanisms with motors positioned within the housing, can be utilized with equal utility. As well, while the body member is shown herein as a two part construction, it will be evident that same can readily be constructed as a unitary part, or of several parts joined together by conventional means other than boding, such as welding, for example. Additionally, it should be appreciated that the nozzle can be constructed out of a wide variety of materials including, but not limited to, fiberglass, galvanized steel, stainless steel and epoxy-coated steel. Lastly, it should be noted that, notwithstanding that the nozzle of the present invention is described as being directly connected to the fan housing, same can also be employed at the top end of a stack or exhaust duct of conventional construction. It will be evident that these modfications, and others which may be obvious to persons of ordinary skill in the art, may be made without departing from the spirit or scope of the invention, which is accordingly limited only by the claims appended hereto, purposively construed.
_g_
[Q031~ Finally, it is to be understood that while but a single embodiment of the present invention is herein shown and described, it will be understood that various changes in size and shape of parts can be made. For example, only, while the nozzle of the present invention is shown in use w~h a radial fan driven by an external motor, it will be evident that other fan mechanisms, including fan mechanisms with motors positioned within the housing, can be utilized with equal utility. As well, while the body member is shown herein as a two part construction, it will be evident that same can readily be constructed as a unitary part, or of several parts joined together by conventional means other than boding, such as welding, for example. Additionally, it should be appreciated that the nozzle can be constructed out of a wide variety of materials including, but not limited to, fiberglass, galvanized steel, stainless steel and epoxy-coated steel. Lastly, it should be noted that, notwithstanding that the nozzle of the present invention is described as being directly connected to the fan housing, same can also be employed at the top end of a stack or exhaust duct of conventional construction. It will be evident that these modfications, and others which may be obvious to persons of ordinary skill in the art, may be made without departing from the spirit or scope of the invention, which is accordingly limited only by the claims appended hereto, purposively construed.
_g_
Claims (20)
1. An exhaust gas nozzle.comprising:
a tubular body member forming an exhaust passage and defining an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perpendicular to said medial plane, said tubular body member comprising a pair of flared portions spaced-apart from one another on opposite sides of the lateral plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching said passage from said first end to said second end.
a tubular body member forming an exhaust passage and defining an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perpendicular to said medial plane, said tubular body member comprising a pair of flared portions spaced-apart from one another on opposite sides of the lateral plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching said passage from said first end to said second end.
2. A nozzle according to claim 1, wherein the flared portions each comprise a substantially planar central portion extending from the first end to the second end and extending substantially normal to the. medial plane.
3. A nozzle according to claim 2, wherein the central portion has and is defined by a first end defined by the first end of said tubular body member a second end defined by the second end of the tubular body member; a pair of sides, each extending from the first end of the central portion to the second end of the central portion; a substantially planar front face extending between said sides of the central portion and between the first end of the central portion.and the second end of the central portion; and a substantially planar rear face disposed interiorly from the front face, parallel therewith, and extending between said sides of the central portion and between the fast end of the central portion and the second end of the central portion.
4. A nozzle according to claim 3, wherein the sides of the central portion taper towards another as the sides extend towards the second end of the central portion.
5. A nozzle according to claim 3, wherein each flared portion further comprises a-pair of perimeter portions bounding the central portion at said sides thereof and each extending from said first end of the body member to said second end of the body member.
6. A nozzle according to claim 5, wherein each perimeter portion has and is defined by a first end defined by said first end of said tubular body member; a second end defined by the second end of said tubular body member a pair of sides, each extending from the first end of the perimeter portion to the second end of the perimeter portion; an exterior face extending between the sides of the perimeter portion and between the first end of the perimeter portion and the second end of the perimeter portion; and an interior face disposed interiorly from the exterior face and extending between the sides of the perimeter portion and between the first end of the perimeter portion and the second end of the perimeter portion.
7. A nozzle according to claim 6, wherein said sides of each perimeter portion taper towards each other in the direction of the first end of the perimeter portion.
8. A nozzle according to claim 7, wherein the pair of perimeter portions project horizontally from the central portion and then tum outwardly away from said central lateral plane.
9. A nozzle according to claim 1, wherein said tubular body member comprises a pair of sidewalt portions, spaced-apart from one another on opposite sides of the medial plane and each extending from the first end of said tubular body member to the second end of said tubular body member and having an inner side and an outer side.
10. A nozzle according to claim 9, wherein said inner side is substantially planar and parallel to the medial plane at the first end of said tubular body member, and progressively becomes increasingly concave as the respective sidewall portion extends towards the second end of said tubular body member.
11. A nozzle according to claim 9, further comprising a pair of transition portions for each sidewall portion, each of said pair of transition portions extending between and joining its respective sidewall portion to a respective one of the pair of flared portions.
12. A nozzle according to claim 11, wherein each transition portion has a concave inside surface and a convex outside surface and said transition portions are shaped arid dimensioned to define, in combination with the sidewall portions and the flared portions, a smoothly contoured interior surface of said body member and a smoothly contoured exterior surface of said body member.
13. A nozzle according to claim 1, wherein, when viewed along the central lateral plane in a direction normal to the longitudinal axis, the body member tapers in profile from the first end of said tubular body member to the second end thereof.
14. A nozzle according to claim 1, further comprising an annular cap connected to said tubular body member, said cap being disposed about and in spaced, substantially coaxial relation to the second end of said tubular body member and having a cap inlet located towards the first end of said tubular body member and a cap outlet located relatively distal to the first end of the body member.
15. A nozzle according to claim 14, wherein said cap is substantially frustoconical in shape, tapering in diameter towards the cap outlet.
16. In an upblast fan apparatus comprising a fan housing defining a fan inlet to receive gas to be exhausted and a fan outlet to expel gas to be exhausted and a radial fan positioned within said fan housing and adapted to draw said gas in through the fan inlet and to expel said gas out through the fan outlet, the improvement comprising:
a tubular body member forming an exhaust passage and defining an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perpendicular to said medial plane, said tubular body member comprising a pair of flared portions spaced-apart from one another on opposite sides of said lateral central plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching said passage in the direction of said second end, said open first end being in sealed fluid communication with the fan outlet.
a tubular body member forming an exhaust passage and defining an open first end, an open second end, a centrally-disposed longitudinal axis extending between said first end and said second end, a medial plane parallel to and intersecting said longitudinal axis and a central lateral plane parallel to and intersecting said longitudinal axis and arranged perpendicular to said medial plane, said tubular body member comprising a pair of flared portions spaced-apart from one another on opposite sides of said lateral central plane, said flared portions extending from the first end to the second end and gradually and increasingly pinching said passage in the direction of said second end, said open first end being in sealed fluid communication with the fan outlet.
17. An apparatus according to claim 16 further including an annular cap connected to said tubular body member, said cap disposed about and in spaced, substantially coaxial relation to the second end of said tubular body member and having a cap inlet located towards the first end of said tubular body member and a cap outlet located relatively distal to the first end of the body member.
18. An apparatus according to claim 17 wherein said cap is substantially frustroconical in shape, tapering in diameter towards the cap outlet.
19. An apparatus according to claim 18 wherein each flared portion comprises a substantially planar central portion extending from the first end to the second end and extending substantially normal to the medial plane and a pair of perimeter portions bounding the central portion and each extending from said first end of said tubular body member to said second end thereof.
20. An exhaust gas nozzle-comprising:
a tubular body member extending between an open first end and an open second end and forming a single exhaust passage that extends between said first and second ends, elongate longitudinal channels being formed on opposite sides of said tubular member and on an exterior surface of said tubular member, said channels extending to said second end and being open at said second end, wherein said channels gradually restrict said passage towards said second end;
and an annular cap connected to said tubular body member,said cap being disposed about and in spaced, substantially coaxial relation to said second end of said tubular body member and having a cap inlet for atmospheric air located below said second end and a cap outlet located substantially above said second end of the tubular body member.
a tubular body member extending between an open first end and an open second end and forming a single exhaust passage that extends between said first and second ends, elongate longitudinal channels being formed on opposite sides of said tubular member and on an exterior surface of said tubular member, said channels extending to said second end and being open at said second end, wherein said channels gradually restrict said passage towards said second end;
and an annular cap connected to said tubular body member,said cap being disposed about and in spaced, substantially coaxial relation to said second end of said tubular body member and having a cap inlet for atmospheric air located below said second end and a cap outlet located substantially above said second end of the tubular body member.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2365932 CA2365932A1 (en) | 2001-12-17 | 2001-12-17 | Nozzle for an upblast fan |
| CA002413627A CA2413627C (en) | 2001-12-13 | 2002-12-06 | Nozzle for an upblast fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2365932 CA2365932A1 (en) | 2001-12-17 | 2001-12-17 | Nozzle for an upblast fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2365932A1 true CA2365932A1 (en) | 2003-06-17 |
Family
ID=4170940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2365932 Abandoned CA2365932A1 (en) | 2001-12-13 | 2001-12-17 | Nozzle for an upblast fan |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2365932A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2404436A (en) * | 2003-07-15 | 2005-02-02 | Gilberts | Nozzle for a ceiling mounted ventilation diffuser |
| WO2008154080A2 (en) | 2007-06-05 | 2008-12-18 | Alstom Technology Ltd | Coal nozzle tip shroud |
-
2001
- 2001-12-17 CA CA 2365932 patent/CA2365932A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2404436A (en) * | 2003-07-15 | 2005-02-02 | Gilberts | Nozzle for a ceiling mounted ventilation diffuser |
| GB2404436B (en) * | 2003-07-15 | 2007-10-17 | Gilberts | Ventilation |
| WO2008154080A2 (en) | 2007-06-05 | 2008-12-18 | Alstom Technology Ltd | Coal nozzle tip shroud |
| WO2008154080A3 (en) * | 2007-06-05 | 2009-04-23 | Alstom Technology Ltd | Coal nozzle tip shroud |
| US8267020B2 (en) | 2007-06-05 | 2012-09-18 | Alstom Technology Ltd | Coal nozzle tip shroud |
| CN101680653B (en) * | 2007-06-05 | 2013-02-06 | 阿尔斯托姆科技有限公司 | Coal nozzle tip shroud and manufacture method thereof |
| US8661992B2 (en) | 2007-06-05 | 2014-03-04 | Alstom Technology Ltd | Coal nozzle tip shroud |
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| Date | Code | Title | Description |
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| FZDE | Dead |