WO2016143086A1 - Soufflante centrifuge - Google Patents

Soufflante centrifuge Download PDF

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Publication number
WO2016143086A1
WO2016143086A1 PCT/JP2015/057117 JP2015057117W WO2016143086A1 WO 2016143086 A1 WO2016143086 A1 WO 2016143086A1 JP 2015057117 W JP2015057117 W JP 2015057117W WO 2016143086 A1 WO2016143086 A1 WO 2016143086A1
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WO
WIPO (PCT)
Prior art keywords
fan
bell mouth
casing
fan casing
plate portion
Prior art date
Application number
PCT/JP2015/057117
Other languages
English (en)
Japanese (ja)
Inventor
裕一 矢田
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2015/057117 priority Critical patent/WO2016143086A1/fr
Publication of WO2016143086A1 publication Critical patent/WO2016143086A1/fr

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers

Definitions

  • the present invention relates to an improvement in the efficiency of a centrifugal fan, particularly a turbo fan.
  • a suction port structure of a turbofan is separate from a suction portion structure fixed to a casing and a suction portion structure of a fan, and contact is prevented by providing a certain amount of gap in the radial direction.
  • high fan efficiency is required, providing a gap causes air to circulate and reduce fan efficiency. Therefore, a structure has been proposed in which the air flowing between the gaps is reduced while allowing the gaps.
  • the suction portion structure and the fan suction portion structure are separate from each other, and have a structure in which a seal material that is worn by contact with the shroud is provided and rotated to be a minimum gap after installation.
  • a fan and a bell mouth are integrated, but sealing is performed in a shape like that of Example 1 (FIGS. 2A and 2B) in the document.
  • JP 2010-138700 A JP-A-11-94284
  • the suction port structure (casing side bell mouth) fixed to the casing is separate from the fan suction portion structure (fan bell mouth), and a certain amount of gap is provided in the radial direction.
  • the gap is narrowed to increase the efficiency, the risk of interference increases.
  • related parts are required to have high dimensional accuracy and assembly accuracy, and the cost also increases.
  • the sealing material may not be cut off during installation and may be scattered during operation.
  • the bell mouth and the fan are integrated, but the seal on the outer periphery of the bell mouth is not sufficient, and air flows out from the outer periphery of the bell mouth more than the leakage improvement by integration, and the fan efficiency is improved. There was a problem of getting worse.
  • the present invention has been made to solve the above-described problems, and aims to minimize the leakage of air from between the fixed part and the rotating part of the centrifugal blower and improve the fan efficiency.
  • a centrifugal blower is connected to a fan casing having a suction port on one side surface and a blower outlet on the other side surface, a fan member that is arranged in the fan casing and rotates inside the fan casing, and the fan member.
  • a fan for rotating the fan member, and a bell mouth disposed between the suction port of the fan casing and the fan member, and the fan member has a disk-like introduction plate portion having an air introduction hole;
  • a fan-shaped introduction plate comprising: a disc-shaped back plate portion facing the introduction plate portion; and a plurality of blade plate portions provided in the circumferential direction connecting the introduction plate portion and the back plate portion.
  • the peripheral edge of the one end opening of the bell mouth is integrally connected to the part, and the peripheral edge of the other end opening of the bell mouth and the peripheral edge of the suction port of the fan casing are non-contacted via a non-contact seal structure. Connect by contact It is what is.
  • the peripheral edge portion of the one end opening of the bell mouth is integrally connected to the introduction plate portion of the fan member over the entire periphery, the peripheral edge portion of the other end opening of the bell mouth, and the peripheral edge of the suction opening of the fan casing Since the portion is connected in a non-contact manner through a non-contact seal structure, air leakage from between the bell mouth and the fan casing can be minimized. Thereby, the circulation in a casing can be reduced further and fan efficiency can be improved. In addition, there is an effect that dimensional management can be performed very easily.
  • FIG. 1 It is a side view including the partial cross section of the centrifugal blower in Embodiment 1 of this invention. It is a figure which shows the fan member of the said centrifugal blower, Comprising: (a) is a top view, (b) is a bottom view. It is a fragmentary sectional side view which shows the principal part of the said centrifugal blower. It is a schematic diagram of the flow of the air in the said centrifugal blower. It is sectional drawing of the conventional centrifugal fan casing. It is a schematic diagram which shows the flow of the air in the said centrifugal blower.
  • (A)-(g) is a partial schematic sectional side view which shows the various modifications of the non-contact sealing structure of the centrifugal blower in Embodiment 2 of this invention. It is a schematic internal block diagram which shows the inside of the air conditioner to which the centrifugal air blower in Embodiment 3 of this invention is applied. It is a fragmentary sectional side view of the centrifugal air blower integrated in the said air conditioner.
  • FIG. 1 is a cross-sectional view of the inside of a fan casing of a centrifugal blower according to Embodiment 1 of the present invention.
  • a centrifugal blower according to this embodiment includes a fan casing 1 formed in a cylindrical shape or a polygonal shape, a fan member 2 disposed in the fan casing 1, and a motor that rotationally drives the fan member 2. 3, and a bell mouth 4 provided between the fan casing 1 and the fan member 2.
  • a suction port 1 ⁇ / b> B having a circular shape in plan view is formed on a top plate 1 ⁇ / b> A that is a side surface on one end, and a blower outlet 1 ⁇ / b> D having a circular shape in plan view is formed on a bottom plate 1 ⁇ / b> C that is a side surface on the other end.
  • the motor 3 is configured such that its rotational drive shaft 3A is connected to a back plate portion 2B (detailed later) of the fan member 2 to rotationally drive the fan member 2.
  • This motor 3 is fixed to the inner wall of the air conditioning unit casing (not shown in FIG. 1) outside the blower, the outside, the fan casing 1 or the like. Due to the configuration of the motor 3 described above, the fan member 2 is arranged to rotate around the cylinder center C of the fan member 2. In some cases, the front surface of the bottom plate 1C is opened to form the air outlet 1D.
  • the fan member 2 includes an introduction plate portion 2A formed in the shape of a disc with a hole in a plan view, and a planar view disc disposed facing the introduction plate portion 2A at a position below the introduction plate portion 2A.
  • a plurality of rear plate portions 2B, and an introduction plate portion 2A and a back plate portion 2B are arranged apart from each other in the circumferential direction (arrow R direction) to connect the introduction plate portion 2A and the back plate portion 2B.
  • the introduction plate portion 2 ⁇ / b> A is formed with an air introduction hole 2 ⁇ / b> D having a circular shape in plan view for taking air into the fan member 2.
  • the fan blower outlet 2E which blows off air, respectively.
  • the peripheral part 4B of the one end opening 4A of the bell mouth 4 is integrally connected to the upper surface of the peripheral part of the introduction plate part 2A over the entire periphery.
  • the peripheral edge portion 4D of the other end opening 4C of the bell mouth 4 and the peripheral edge portion 1E of the suction port 1B of the fan casing 1 are connected in a non-contact manner via a non-contact seal structure 5.
  • a labyrinth seal structure 6 is employed as the non-contact seal structure 5.
  • the labyrinth seal structure 6 is configured such that the first ring-shaped member 7 and the second ring-shaped member 8 face each other through the gap S in a non-contact manner as shown in an enlarged view in FIG.
  • the first ring-shaped member 7 is attached to the entire surface of the face 4E facing the peripheral edge 1E of the fan casing 1 at the peripheral edge 4D of the other end opening 4C of the bell mouth 4.
  • two second ring-shaped members 8 and 8 are attached to the entire surface of the peripheral surface 1F of the peripheral portion 1E of the suction port 1B of the fan casing 1 facing the peripheral portion 4D of the bell mouth 4.
  • the two second ring-shaped members 8 and 8 are arranged on both sides of the first ring-shaped member 7 through gaps S, S, S,... .
  • FIGS. 1 to 4 first, when the motor 3 is driven, the fan member 2 and the bell mouth 4 are integrally rotated in the direction of the arrow R around the cylindrical center C. Thereby, air is smoothly drawn in from 4C of the bell mouth 4, and is sent into the fan member 2 through the air inlet 2D. The air sent into the fan member 2 is blown into the fan casing 1 in the centrifugal direction from the fan outlets 2E, 2E, 2E,. After the direction is changed in the direction of the cylinder center C in the casing 1, the air is blown out from the blower outlet 1 ⁇ / b> D. At this time, the pressure of the air blown out from the fan outlets 2E, 2E, 2E,...
  • the non-contact seal structure 5 exists between the peripheral edge 4D of the other end opening 4C of the bell mouth 4 and the peripheral edge 1E of the suction port 1B of the fan casing 1, it is provided in many stages. Due to the existence of the formed gaps S, S, S..., The leakage pressure is successively reduced, and finally the bell mouth 4 and the fan casing 1 are sealed freely by a slight air leak.
  • the bell mouth 4 and the fan member 2 are integrated, and the bell mouth 4 and the fan casing 1 are connected in a non-contact manner through the non-contact seal structure 5.
  • the non-contact type seal structure 5 is a labyrinth seal structure 6, and the labyrinth is formed on the peripheral edge part 1E of the suction port 1B of the fan casing 1 and the peripheral edge part 4D of the other end opening 4C of the bell mouth 4 which are flat parts.
  • first ring-shaped member 7 and the second ring-shaped member 8 constituting the structure are provided, relatively high sealing efficiency can be obtained. That is, the significant leakage of air and the circulation in the casing can be further reduced, and the fan efficiency can be improved.
  • first ring-shaped member 7 and the second ring-shaped member 8 are made of synthetic resin, even if the rotating first ring-shaped member 7 comes into contact with the second ring-shaped member 8, a spark is large. There is no noise or impact, and relatively little wear is required.
  • Embodiment 2 FIG. In Embodiment 1, although an example of the labyrinth seal structure 6 is illustrated as a non-contact seal structure, Embodiment 2 which showed the various modification of a non-contact seal structure is demonstrated next. Variations of these non-contact seal structures are shown in FIGS. 5 (a) to 5 (g). First, the non-contact seal structure 5a of FIG. 5A shows a labyrinth seal structure 6a in which the shapes of the first ring-shaped member and the second ring-shaped member are different from those shown in the first embodiment.
  • first ring-shaped members 7a, 7a are provided on the peripheral edge 4D of the bell mouth 4, and two second ring-shaped members are provided on the peripheral edge 1E of the top plate 1A of the fan casing. 8a and 8a are provided.
  • Each of the first ring-shaped member 7a and the second ring-shaped member 8a is formed in a triangular cross section that tapers toward the opposing surface.
  • These first ring-shaped member 7a and second ring-shaped member 8a are also sealed by the presence of zigzag gaps S, S, S,.
  • the introduction plate portion 2A of the fan member 2 is integrally connected to the peripheral portion 4B of the bell mouth 4.
  • the introduction plate portion 2A of the fan member 2 is integrally formed with the peripheral portion 4B of the bell mouth 4. It is connected.
  • the numbers of the first ring-shaped member 7a and the second ring-shaped member 8a are set in consideration of the cost, the leakage amount, etc., and are not limited to the first and second items.
  • the 2nd ring-shaped member 8b which faces the front-end
  • the top surface of the top plate 1A of the fan casing 1 faces the top surface of the peripheral portion 4D of the bell mouth 4 in a non-contact manner in the radial direction and the cylinder center C direction.
  • a ring step plate member 12 is provided over the entire circumference of the suction port 1B.
  • the ring step plate member 12 is formed in a step shape in a side sectional view.
  • the subsequent non-contact seal structure 5d in FIG. 5 (d) has a ring step plate member 12a in which the rising plate portion is inclined with respect to the cylindrical center C direction as compared with the ring step plate member 12 in FIG. 5 (c). It is used.
  • the second ring-shaped member 8c is provided over the entire circumference of the suction port 1B on the inner peripheral surface of the ring step plate member 12a shown in FIG. 5 (d). It has been.
  • the non-contact seal structure 5f shown in FIG. 5 (f) has a peripheral drooping portion 4Da which is further bent downward after the peripheral edge portion 4D of the bell mouth 4 extends to the outside in the radial direction of the top plate 1A of the fan casing 1. It has.
  • Embodiment 3 FIG.
  • the centrifugal blower according to the third embodiment has a cylindrical air conditioner having a unit suction port 10 ⁇ / b> B on the top plate 10 ⁇ / b> A that is one side surface and a unit outlet 10 ⁇ / b> D on the bottom plate 10 ⁇ / b> C that is the other side surface.
  • the centrifugal blower includes a fan casing 1a formed in a cylindrical shape, a fan member 2 disposed in the fan casing 1a, a motor 3 that rotationally drives the fan member 2, A bell mouth 4 provided between the fan casing 1a and the fan member 2 is provided.
  • the fan casing 1 has a top plate 1A at one end side surface and a bottom plate 1C having an air outlet 1D at the other side surface.
  • the bell mouth 4 has substantially the same shape as that shown in the first embodiment.
  • the peripheral part 4B of the one end opening 4A of the bell mouth 4 is integrally connected to the upper surface of the introduction plate part 2A of the fan member 2 over the entire circumference.
  • the peripheral edge 4D of the other end opening 4C of the bell mouth 4 and the peripheral edge 1E of the top plate 1A of the fan casing 1a are integrally connected over the entire periphery. That is, the integrated fan unit 9 is configured by integrating the fan member 2, the bell mouth 4 and the fan casing 1a.
  • the peripheral part 1E of the blower outlet 1D of the fan casing 1a in the integrated fan unit 9 and the bottom plate 10C of the peripheral part 10E of the unit blower outlet 10D of the air-conditioning unit casing 10 are not.
  • the contact seal structure 5 is connected in a non-contact manner.
  • a labyrinth seal structure 6b is employed as the non-contact type seal structure 5, for example.
  • a labyrinth seal structure 6b is employed in the labyrinth seal structure 6b, as shown in FIG. 7, one first ring-shaped member 7 and one second ring-shaped member 8 face each other through the gaps S and S without contact.
  • the 1st ring-shaped member 7 is provided in the opposing surface 1F with the air-conditioning unit casing 10 in the peripheral part 1C of the blower outlet 1D of the fan casing 1a over the perimeter.
  • the 2nd ring-shaped member 8 is provided over the perimeter surface 10F with the bottom plate 1C of the fan casing 1a in the peripheral part 10E of the unit blower outlet 10D of the air conditioning unit casing 10 over the perimeter.
  • the 1st ring-shaped member 7 and the 2nd ring-shaped member 8 which comprise this labyrinth seal structure 6b are comprised, for example with the synthetic resin.
  • the integrated fan unit 9 is provided in the air conditioning unit casing 10, and the peripheral portion 1E of the air outlet 1D of the fan casing 1a and the unit of the air conditioning unit casing 10 are provided. Since a structure in which the peripheral edge portion 10E of the air outlet 10D is connected in a non-contact manner through a labyrinth seal structure 6 that is a non-contact seal structure 5, air from between the fan casing 1a and the air conditioning unit casing 10 is used. Leakage can be eliminated as much as possible, and dimensional control can be performed very easily. Moreover, since the labyrinth seal structure 6b is applied, a significant air leakage can be further reduced and the fan efficiency can be improved.
  • the present invention is not limited thereto.
  • you may comprise a 1st ring-shaped member and a 2nd ring-shaped member with heat insulating materials, such as a polyurethane foam. In the case of using such a heat insulating material, noise and impact during driving can be further reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une soufflante centrifuge, laquelle soufflante comporte : un carter de ventilateur ayant une admission d'aspiration dans un panneau supérieur et une sortie dans un panneau inférieur; un élément de ventilateur qui est disposé à l'intérieur du carter de ventilateur et qui tourne à l'intérieur du carter de ventilateur; un moteur qui est accouplé à l'élément de ventilateur et qui entraîne l'élément de ventilateur en rotation; et une embouchure d'évasement disposée entre l'admission d'aspiration du carter de ventilateur et l'élément de ventilateur. L'élément de ventilateur comprend une section de panneau d'introduction en forme de disque ayant un trou d'introduction d'air, une section de panneau arrière en forme de disque disposée de manière à faire face à la section de panneau d'introduction, et une pluralité de sections de panneau à aubes disposées dans une direction périphérique de façon à coupler la section de panneau d'introduction et la section de panneau arrière l'une à l'autre. Un bord périphérique d'une ouverture d'extrémité de l'embouchure d'évasement est relié d'un seul tenant sur la totalité de la périphérie à la section de panneau d'introduction de l'élément de ventilateur. Un bord périphérique de l'autre ouverture d'extrémité de l'embouchure d'évasement et un bord périphérique de l'admission d'aspiration du carter de ventilateur sont couplés sans contact, par l'intermédiaire d'une structure de joint d'étanchéité sans contact constituée par un joint à labyrinthe. La circulation d'air à l'intérieur de la soufflante centrifuge due à une fuite d'air à partir d'un espace entre l'embouchure d'évasement et l'élément de ventilateur est réduite.
PCT/JP2015/057117 2015-03-11 2015-03-11 Soufflante centrifuge WO2016143086A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/057117 WO2016143086A1 (fr) 2015-03-11 2015-03-11 Soufflante centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/057117 WO2016143086A1 (fr) 2015-03-11 2015-03-11 Soufflante centrifuge

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WO2016143086A1 true WO2016143086A1 (fr) 2016-09-15

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57134399U (fr) * 1981-02-18 1982-08-21
JPH09126192A (ja) * 1995-11-07 1997-05-13 Matsushita Refrig Co Ltd 遠心送風機
US20020098084A1 (en) * 2001-01-25 2002-07-25 Jakel Incorporated Blower housing with inlet guide
JP2011190776A (ja) * 2010-03-16 2011-09-29 Denso Corp 遠心式多翼ファン
JP2012112324A (ja) * 2010-11-25 2012-06-14 Mitsubishi Heavy Ind Ltd 多翼遠心ファンおよびそれを用いた空気調和機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57134399U (fr) * 1981-02-18 1982-08-21
JPH09126192A (ja) * 1995-11-07 1997-05-13 Matsushita Refrig Co Ltd 遠心送風機
US20020098084A1 (en) * 2001-01-25 2002-07-25 Jakel Incorporated Blower housing with inlet guide
JP2011190776A (ja) * 2010-03-16 2011-09-29 Denso Corp 遠心式多翼ファン
JP2012112324A (ja) * 2010-11-25 2012-06-14 Mitsubishi Heavy Ind Ltd 多翼遠心ファンおよびそれを用いた空気調和機

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