CN112867869A - 径流式风扇 - Google Patents

径流式风扇 Download PDF

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CN112867869A
CN112867869A CN201980067766.2A CN201980067766A CN112867869A CN 112867869 A CN112867869 A CN 112867869A CN 201980067766 A CN201980067766 A CN 201980067766A CN 112867869 A CN112867869 A CN 112867869A
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radial
pressure chamber
fan
radial fan
flow divider
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CN112867869B (zh
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V·埃勒斯
K·沙克
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Ebian Pat St Jogan Co ltd
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Ebian Pat St Jogan Co ltd
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Priority claimed from DE102018129613.4A external-priority patent/DE102018129613A1/de
Priority claimed from DE102018129608.8A external-priority patent/DE102018129608B4/de
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/006—Tidal volume membrane 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/062—Details of the bearings
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
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    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
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    • F04D29/056—Bearings
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    • 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
    • F04D29/08—Sealings
    • F04D29/083—Sealings 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • 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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • 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
    • F04D29/441—Fluid-guiding means, e.g. diffusers 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/37—Retaining components in desired mutual position by a press fit connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/46—Fans, e.g. ventilators

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Support Of The Bearing (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

本发明涉及一种具有马达(2)和风扇壳体的径流式风扇(1)，该风扇壳体以外部(4)和内部(5)形成螺旋形压力室(D)，其中，外部上布置有形成径流式风扇(1)的鼓风口(44)的压力套接头(33)，其中，风扇壳体中设置有风扇叶轮(3)，该风扇叶轮布置在与马达(2)连接的轴(7)上，且其中，径向邻接风扇叶轮(3)布置有呈环形包围风扇叶轮(3)的分流器(8)，该分流器与风扇壳体共同围绕风扇叶轮(3)形成扩压器(9)，该扩压器(9)直接过渡到压力室(D)中。

Description

径流式风扇
技术领域
本发明涉及一种径流式风扇，该径流式风扇构造为高转速的径流式风扇，能够改进压力建立和效率，同时减少发出噪声。
背景技术
现有技术中，例如参阅德国实用新型专利DE202018106694U1，已知通用型径流式风扇。
相应的径流式风扇原则上存在结构空间很小的问题，同时还应尽量以最佳方式促进从进风口到鼓风口的气流。良好的流动条件可以改进径流式风扇的效率、压力建立和声响效果。径流式风扇通常具有螺旋状壳体，该壳体容纳径向叶轮发出的快速气流，使其减速，并最终将其转换为可用的压力。这里，无扰动的延迟有利于压力建立。
发明内容
本发明的目的是提供一种径流式风扇，能够改进其气流，以便尽量提高效率，同时改进声响效果。就此而言，应当尽量减小径流式风扇所需的结构空间。
本发明用以达成上述目的的解决方案为根据权利要求1所述的特征组合。
根据本发明，提出一种具有马达和风扇壳体的径流式风扇，该风扇壳体以外部和内部形成螺旋形压力室。外部上布置有压力套接头，该压力套接头形成径流式风扇的鼓风口。风扇壳体中设置有风扇叶轮，该风扇叶轮布置在与马达连接的轴上，并在运行中轴向吸入空气并径向吹出空气。径向邻接风扇叶轮布置有呈环形包围风扇叶轮的分流器，该分流器与风扇壳体共同围绕风扇叶轮形成扩压器，该扩压器直接过渡到压力室中。
对于风扇叶轮而言，重点是它在出风口的整个圆周上具有均匀的背压。这样，风扇叶轮上的每个叶片都会以最佳方式有助于产生气流。风扇叶轮周围的压力分布不均匀会导致风扇叶轮出现不利的不理想断流和回流。为了有利于从风扇叶轮到压力室内的压力建立，围绕风扇叶轮设置分流器，该分流器与风扇壳体共同为从风扇叶轮发出的气流提供了扩压器，该扩压器可与压力室处于直接的流体连通，并为风扇叶轮提供均匀的背压。径向排出的空气流过扩压器，从径向内部向径向外部直到径向末端，然后进入压力室。
压力室的进气口自然是径向邻接扩压器，但螺旋形压力室本身优选地构造成在相邻的轴向平面中轴向邻接至扩压器，使得来自分流器的气流沿切向流入到压力室中。分流器可以径向向外延伸出去，使得风扇壳体及其螺旋形压力室的径向外部区域中形成入流，从而产生限定的螺旋涡流。这样就能减少螺旋形压力室中的湍流损失。
所述径流式风扇的一种有利实施方式规定，外部具有限定压力室的恒定外径，并且压力室的螺旋形状仅由内部确定。在本实施方案中，径流式风扇的结构空间特别紧凑。通过使用分流器，可以补偿因经由内部产生的压力室螺旋形而导致的缺陷。
所述径流式风扇的优选实施方案还在于，螺旋形压力室由轴向扩展和径向扩展形成。通过在两个方向上扩大压力室，能够以较小的空间需求实现螺旋形状。
在所述径流式风扇中，分流器优选地相对于内部的径向内壁面在径向方向上突出，从而形成压力室的轴向面。螺旋形压力室轴向邻接至扩压器，其中，分流器有利地在第一轴向侧上形成扩压器的流动面，而在相反的轴向面上形成螺旋形压力室的轴向壁面。
在所述径流式风扇中，一种变型方案规定，马达具有带电子部件的印刷电路板，并且内部使压力室与印刷电路板分隔。这样实现压力室与马达电子器件的轴向嵌套的紧凑布置。
在所述径流式风扇中，一种实施方案还有益的是，内部是马达的转子的整体组成部分。零件数和零件所需的结构空间得以最小化。
马达尤其是构造为具有轴向开口的轴承管的封闭式马达。在此有利的是，轴承管与内部一体成型。这样发达的功能就能与空气动力学的功能相组合，以进行流动控制，而无需其他部件。
在一种改进方案中，所述径流式风扇的特征还在于，分流器是轴承管和转子组件的整体组成部分。在一种有益的实施方案中，分流器嵌入到轴向开口的轴承管中，并至少局部地采取内部的形状。
在一种实施方式中，分流器具有盆状的轴向凹部，该凹部的直径基本上对应于风扇叶轮的外径。风扇叶轮轴向嵌入到凹部中，最小间隙为0.2mm至0.5mm以确保旋转，使得风扇叶轮吹出的气流直接受到分流器的径向相继段的影响，从而形成扩压器。
该凹部使得风扇叶轮和分流器的轴向结构能够非常紧凑。在一种改进方案中，所述径流式风扇的特征在于，分流器在其面向压力室的自由端处至少局部地具有倒圆。该倒圆尤其是设置在扩压器的径向末端处，以改进流入压力室的切向入流。
作为所述径流式风扇的另一种变型方案，内部在其径向外缘段上具有环绕的轴向凸起，该轴向凸起抵靠在外部上。由此在压力室的内部中产生轴向凹部，其中，通过环绕的凸起，同时确保内部与外部之间存在足够的接触面。
在一种变型方案中，所述径流式风扇还包括至少一个用于支承轴的轴承，该轴承布置在分流器与轴之间。优选地设置两个轴向间隔的轴承，这两个轴承通过弹簧张紧并分别布置在分流器与轴之间。
在所述径流式风扇中，马达优选地容纳在壳盖中。外部、内部和壳盖经由密封件彼此密封，以使压力损失最小化。
附图说明
本发明的其他有利改进方案参阅从属权利要求的特征或者下面参照附图结合本发明的优选实施方案的描述来详细说明。图中：
图1示出径流式风扇的俯视图；
图2示出图1中A-A的剖视图；
图3示出图1中B-B的剖视图。
在图1至图3中示出根据本发明的径流式风扇1的实施例轴向俯视图以及两个剖视图A-A和B-B。
具体实施方式
径流式风扇1包括构造为封闭式马达并具有转子22和定子32的马达2。转子22的磁体附接至轴7，该轴7沿旋转轴线轴向延伸穿过径流式风扇1。轴7上附接有构造为径流式风扇叶轮的风扇叶轮3，该风扇叶轮3在运行中通过其叶轮叶片经由进气口69轴向吸入空气，并经由压力套接头33在鼓风口44处吹出空气。径流式风扇1还包括风扇壳体，该风扇壳体由外部4、内部5和壳盖17形成，马达2容纳在该壳盖17中。印刷电路板10在内部5与马达2之间轴向附接至壳盖17，该印刷电路板10具有固定于其上的用于调节径流式风扇1的电子部件98。内部5一方面在面向马达2的一侧上形成用于电子部件98的自由空间，另一方面在径流式风扇1面向外部4的轴向相对侧上与外部共同确定了螺旋形压力室D。在此，内部5径向向外延伸，直到外部4与壳盖17之间，并经由外部4和壳盖17固定。设置密封件25，以密封由内部5分隔的两个轴向区域。电子部件98布置在邻接压力室D的自由空间中并因此面向气流，由此将热量散发到内部5并因此进行冷却。
径向邻接风扇叶轮3布置有呈环形包围风扇叶轮3的分流器8，该分流器8与风扇壳体的外部4的内壁面共同围绕风扇叶轮3形成扩压器9。外部4的内壁面和分流器8在扩压器9的区域中垂直于旋转轴线径向向外延伸。在一种替选实施方案中，分流器和外部的彼此相向的壁面也可以会聚。分流器8的自由端形成扩压器9的末端并具有倒圆R。扩压器9直接过渡到压力室D中。压力室D的螺旋形状仅通过内部5形成，而外部4具有恒定的直径。参照图2和图3可以清楚地看出，由于内部5的构型，压力室D既有轴向扩展也有径向扩展。分流器8在径向方向上相对于内部5的径向内壁面87突出，并部分地形成压力室D的上侧轴向面。在一种替选实施方案中，分流器在周向上与内壁面部分齐平。内部5在下侧具有环绕的沟形凹槽，该凹槽在外侧径向过渡成轴向凸起18，该轴向凸起18形成与外部4的内壁面的接触面。压力室D轴向偏移，但压力室D构造为直接邻接扩压器9，使得风扇叶轮3所产生的气流沿切向从扩压器9流出到压力室D中。压力套接头33作为压力室D的延长部分构造在外部4上。
轴承管11轴向居中延伸穿过印刷电路板10并容纳转子22。轴承管11由内部5一体成型。分流器8构造为嵌件并插入到轴承管11中。它即形成轴承管11的整体组成部分，并因此形成转子组件。轴7经由两个轴承19支承在分流器8和轴承管11上。两个轴承19经由弹簧21在轴向方向上张紧。替选地，轴7也可以相对于轴承管11支承。
在风扇叶轮3的侧面上，分流器8具有盆状的轴向凹部14，风扇叶轮3以其底盘嵌入到该凹部14中，使得风扇叶轮3的出风口与邻接的分流器的表面8在轴向平面上齐平。凹部14的直径等于风扇叶轮3的底盘的外径，使得从风扇叶轮3到分流器8的过渡基本上无间隙。基本上无间隙意味着确保风扇叶轮3相对于分流器8的旋转。

Claims (15)

1.一种具有马达(2)和风扇壳体的径流式风扇(1)，所述风扇壳体以外部(4)和内部(5)形成螺旋形压力室(D)，其中，所述外部上布置有形成所述径流式风扇(1)的鼓风口(44)的压力套接头(33)，其中，所述风扇壳体中设置有风扇叶轮(3)，所述风扇叶轮(3)布置在与所述马达(2)连接的轴(7)上，且其中，径向邻接所述风扇叶轮(3)布置有呈环形包围所述风扇叶轮(3)的分流器(8)，所述分流器(8)与所述风扇壳体共同围绕所述风扇叶轮(3)形成扩压器(9)，所述扩压器(9)直接过渡到所述压力室(D)中。
2.根据权利要求1所述的径流式风扇，其特征在于，所述外部具有限定所述压力室(D)的恒定外径，并且所述压力室(D)的螺旋形状仅由所述内部(5)确定。
3.根据权利要求1或2所述的径流式风扇，其特征在于，所述螺旋形压力室(D)由轴向扩展和径向扩展形成。
4.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述分流器(8)相对于所述内部(5)的径向内壁面至少部分地在径向方向上突出，从而形成所述压力室(D)的轴向面。
5.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述马达(2)具有带电子部件的印刷电路板(10)，并且所述内部(5)使所述压力室(D)与所述印刷电路板(10)分隔。
6.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述内部(5)是所述马达(2)的转子(22)的整体组成部分。
7.根据前一项权利要求所述的径流式风扇，其特征在于，所述马达(2)构造为具有至少一侧轴向开口的轴承管(11)的封闭式马达。
8.根据前一项权利要求所述的径流式风扇，其特征在于，所述轴承管(11)和所述内部(5)一体成型。
9.根据前述权利要求7至8中任一项所述的径流式风扇，其特征在于，所述分流器(8)是所述轴承管(11)的整体组成部分。
10.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述分流器(8)具有盆状的轴向凹部(14)，所述凹部(14)的直径基本上对应于所述风扇叶轮(3)的外径，其中，所述风扇叶轮(3)局部地轴向嵌入到所述凹部(14)中。
11.根据前述权利要求7至10中任一项所述的径流式风扇，其特征在于，所述分流器(8)插入到所述轴向开口的轴承管(11)中。
12.根据前一项权利要求所述的径流式风扇，进一步包括用于支承所述轴(7)的至少一个轴承(19)，其中，所述至少一个轴承(19)布置在所述分流器(8)与所述轴(7)之间。
13.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述分流器(8)在其面向所述压力室(D)的自由端处至少局部地具有倒圆(R)。
14.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述内部(5)在其径向外缘段上具有环绕的轴向凸起(18)，所述轴向凸起(18)抵靠在所述外部(4)上。
15.根据前述权利要求中任一项所述的径流式风扇，其特征在于，所述马达(2)容纳在壳盖(17)中，其中，所述外部(4)、所述内部(5)和所述壳盖(17)经由密封件(25)彼此密封。
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