WO2015188748A1 - 一种叶轮 - Google Patents

一种叶轮 Download PDF

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Publication number
WO2015188748A1
WO2015188748A1 PCT/CN2015/081155 CN2015081155W WO2015188748A1 WO 2015188748 A1 WO2015188748 A1 WO 2015188748A1 CN 2015081155 W CN2015081155 W CN 2015081155W WO 2015188748 A1 WO2015188748 A1 WO 2015188748A1
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Prior art keywords
impeller
lower cover
blade
cover
center
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PCT/CN2015/081155
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English (en)
French (fr)
Inventor
倪祖根
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莱克电气股份有限公司
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Publication of WO2015188748A1 publication Critical patent/WO2015188748A1/zh

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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
    • F04D29/26—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
    • 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
    • F04D29/30—Vanes

Definitions

  • the invention belongs to the technical field of processing and manufacturing of a vacuum cleaner motor rotor, and particularly relates to an impeller.
  • the vacuum cleaner is a cleaning appliance that uses a motor to drive the blade to rotate at a high speed to generate air negative pressure in the sealed casing, thereby sucking the dust into the dust collecting bag.
  • the vacuum cleaner can be generally divided into a vertical type, a horizontal type, and a portable type according to the structural composition.
  • the vacuum cleaner motor is the core component of the vacuum cleaner. It is generally composed of two parts. The motor part and the fan part are usually in the range of 20000-30000 rpm because of the high speed requirement of the vacuum cleaner motor. Therefore, the conventional vacuum cleaner motor generally uses a series vacuum cleaner motor. And a small DC vacuum cleaner motor. The series vacuum cleaner motor and the small DC vacuum cleaner motor belong to the brush motor, and the rotation speed is between 20000-40000. Although the rotation speed can meet the requirements of the vacuum cleaner motor, the brush motor is large in size, the motor fan is large, the load is large, and the motor is High noise.
  • the impeller of the conventional series vacuum cleaner motor is an aluminum impeller, which is a closed impeller structure, and generally includes an upper cover plate, a lower cover plate, and blades disposed between the upper and lower cover plates, and the materials are all made of aluminum alloy, closed type
  • the working efficiency of the impeller is high, but the manufacturing process is difficult, and the upper and lower cover plates and blades of the aluminum impeller are assembled and formed, the structure is complicated, the upper and lower cover plates are easy to loose and damage, and the general volume is large and the quality is heavy.
  • the production cost is high and the noise is large during operation.
  • the semi-open impeller and the open impeller are relatively small in size compared to the closed impeller, but their working efficiency is low.
  • the upper and lower covers are flat plates, and the blades are evenly distributed between the upper and lower covers.
  • the length of the blades must be increased, so that the area of the upper and lower covers needs to be increased, resulting in the impeller.
  • the overall volume increases.
  • a brushless motor is generally used for driving, in order to satisfy
  • the impeller structure is generally required to be small.
  • the conventional aluminum closed impeller is no longer suitable for brushless motors, and the conventional impeller has lower performance, higher energy consumption and higher cost of use.
  • the present invention provides an impeller comprising an integrally formed lower cover plate and a blade, wherein the center of the lower cover plate is convex upward to form a curved surface, and the length of the blade is obviously increased under the condition that the coverage area of the lower cover plate is constant.
  • the structure of the impeller is relatively compact to meet the needs of the brushless motor impeller. While ensuring the high speed of the motor, the volume of the motor is reduced, the carrying is convenient, the performance of the motor is improved, the energy consumption is reduced, the working noise is reduced, and the noise is improved. Environmental Quality.
  • An impeller according to the object of the present invention is applied to a brushless cleaner motor, the lower cover of the impeller is designed to have a curved surface center, and a plurality of curved blades are designed on the curved surface.
  • the center of the lower cover of the impeller gradually protrudes upward, and the upper and lower surfaces of the lower cover form a curved surface, and the blade is fixedly disposed on the upper surface of the lower cover.
  • the impeller further includes a central shaft, the central shaft is provided with a shaft hole, and the lower cover is centered on the central axis and fixedly connected to the outer wall of the central shaft.
  • the lower cover is connected at an intermediate position of the outer wall of the central shaft.
  • the blades are distributed in an array centered on the central axis and extend from an outer wall of the central shaft to an edge of the lower cover.
  • the blade, the lower cover and the central shaft are integrally formed.
  • the top of the blade is rounded.
  • an impeller cover is disposed above the blade, and an air inlet is opened at a center of the impeller cover, and the blade is in clearance with the impeller cover.
  • the inner surface of the impeller cover opposite to the blade is concavely formed with a curved surface, and a curved surface formed by the outer edge of the blade is parallel with the arc surface of the inner side of the impeller cover when the blade is rotated. After the impeller cover is assembled over the blade, the impeller cover is in a clearance fit with the blade.
  • the impeller is suitable for high vacuum, high speed brushless DC vacuum cleaner motor.
  • the impeller includes only a lower cover plate and a plurality of curved blades thereon to form a semi-open impeller.
  • the impeller has a relatively small volume and is convenient to carry; the material usage is small and the production cost is low.
  • the center of the lower cover protrudes upward to form a curved surface.
  • the impeller cover is arranged above the blade, and the blade and the impeller cover are matched with each other.
  • the impeller cover plays the role of the upper cover plate in the structure, and forms a closed impeller structure with the lower cover plate and the blade to reduce the motor. At the same time of volume, it ensures the working efficiency of the impeller and meets the needs of small volume and high speed of the motor.
  • the blade is integrally formed with the lower cover plate and the central shaft.
  • the structural strength is high and the performance is good.
  • the looseness between the cover plate and the blade is avoided, and the service life of the impeller is improved.
  • Figure 1 is a schematic view of an impeller disclosed in the present invention
  • Figure 2 is a cross-sectional view of an impeller disclosed in the present invention.
  • Figure 3 is a schematic diagram of the clearance fit between the blade and the impeller cover
  • Figure 4 is an exploded view of the impeller.
  • the impeller of the conventional vacuum cleaner motor is an aluminum impeller, which is a closed impeller structure, and generally includes an upper cover plate, a lower cover plate, and blades disposed between the upper and lower cover plates.
  • the closed impeller has a high working efficiency, but The manufacturing process is difficult, and the upper and lower covers of the aluminum impeller are assembled with the blades.
  • the structure is complicated, the upper and lower covers are easy to loose and damage, and the volume is generally large, the quality is heavy, the production cost is high, and the noise is large during operation.
  • the upper and lower covers are flat plates, and the blades are evenly distributed between the upper and lower covers. In order to increase the working efficiency of the impeller, the length of the blades must be increased, so that the area of the upper and lower covers needs to be increased, resulting in the impeller. The overall volume increases.
  • the present invention is directed to the deficiencies in the prior art, and provides an impeller including an integrally formed lower cover plate and a blade, wherein the center of the lower cover plate is convex upward to form a curved surface, and the blade covers the same area of the lower cover plate.
  • the length of the impeller is obviously increased, so that the structure of the impeller is relatively compact, to meet the needs of the use of the brushless motor impeller, while ensuring the high speed of the motor, reducing the volume of the motor, facilitating carrying, improving the performance of the motor, reducing energy consumption, and reducing Work noise and improve environmental quality.
  • An impeller according to the object of the present invention is applied to a brushless vacuum cleaner motor.
  • the lower cover of the impeller is designed to have a curved surface at the center, and a plurality of curved blades are designed on the curved surface.
  • the center of the lower cover of the impeller gradually protrudes upward, and the upper and lower surfaces of the lower cover form a curved surface, and the blade is fixedly disposed on the upper surface of the lower cover.
  • the impeller further includes a central shaft, the central shaft is provided with a shaft hole, and the lower cover is centered on the central axis and fixedly connected to the outer wall of the central shaft.
  • the lower cover is connected at an intermediate position of the outer wall of the central shaft.
  • the blades are distributed in an array centered on the central axis and extend from an outer wall of the central shaft to an edge of the lower cover.
  • the blade, the lower cover and the central shaft are integrally formed.
  • the top of the blade is rounded.
  • an impeller cover is disposed above the blade, and an air inlet is opened at a center of the impeller cover, and the blade is in clearance with the impeller cover.
  • the inner surface of the impeller cover opposite to the blade is concavely formed with a curved surface, and a curved surface formed by the outer edge of the blade is parallel with the arc surface of the inner side of the impeller cover when the blade is rotated. After the impeller cover is assembled over the blade, the impeller cover is in a clearance fit with the blade.
  • an impeller is applied to the brushless vacuum cleaner motor.
  • the impeller includes a lower cover 1, and the lower cover 1 is provided with a plurality of curved blades 2.
  • a protrusion 5 is gradually formed at the center of the lower cover 1 of the impeller, and the upper and lower surfaces of the lower cover 1 are formed with a curved surface 6 which is fixedly disposed on the upper surface of the lower cover 1.
  • the impeller further includes a central shaft 7 on which a shaft hole 8 is provided, and the lower cover 1 is centered on the central shaft 7 and fixedly coupled to the outer wall of the central shaft 7.
  • the blades 2 are distributed in an array centered on the central axis 7 and extend from the outer wall of the central shaft 7 to the edge of the lower cover 1.
  • the lower cover 1 is connected to an intermediate position of the outer wall of the center shaft 7, and the blade 2, the lower cover 1 and the center shaft 7 are integrally formed.
  • the traditional impeller needs to press and form the upper and lower cover plates and the blades first, and then assembles. The process is complicated and the efficiency is low.
  • the invention adopts the injection molding method to integrally form the impeller, and has convenient production and processing, high production efficiency, and structural strength of the impeller. better.
  • the top of the blade 2 is rounded.
  • the blade 2 has a streamlined structure as a whole, and the airflow is smooth and the work efficiency is high. At the same time, the accumulation of dust can be reduced, the interior of the impeller can be cleaned, and the service life of the impeller can be improved.
  • an impeller cover 3 is disposed above the vane 2, and an air inlet 4 is opened at the center of the impeller cover 3, and the vane 2 is in clearance fit with the impeller cover 3.
  • the external airflow enters the impeller through the air inlet 4, and then enters the rear end of the impeller to cool the motor circuit board and the winding.
  • the inner side of the impeller cover 3 opposite to the vane 2 is concavely formed with a curved surface 6 at the center, and the curved surface formed by the outer edge of the vane 2 is parallelly matched with the curved surface 6 of the inner side of the impeller cover.
  • the impeller cover 3 simultaneously functions as an upper cover plate in the structure, and forms a closed impeller structure with the lower cover plate 1 and the blade 2, which reduces the volume of the motor and ensures the working efficiency of the impeller and satisfies the motor. Small volume, high speed requirements.
  • the invention discloses an impeller applied to a brushless vacuum cleaner motor, wherein the impeller comprises a lower cover plate.
  • the center of the lower cover gradually protrudes upward, and the upper and lower surfaces of the lower cover form a curved surface, and the blade is fixedly disposed on the upper surface of the lower cover.
  • the impeller includes only a lower cover plate and a plurality of curved blades thereon to form a semi-open impeller.
  • the impeller has a relatively small volume and is convenient to carry; the material is used less and the production cost is low.
  • the center of the lower cover protrudes upward to form a curved surface.
  • An impeller cover is arranged above the blade, and the blade and the impeller cover are in a clearance fit.
  • the impeller cover functions as an upper cover plate in the structure, and forms a closed impeller structure with the lower cover plate and the blade to reduce the volume of the motor. At the same time, it ensures the working efficiency of the impeller and meets the requirements of small volume and high speed of the motor.
  • the blade is integrally formed with the lower cover plate and the central shaft, and has high structural strength and good performance, avoiding looseness between the cover plate and the blade, and improving the service life of the impeller.
  • the impeller is suitable for high vacuum, high speed brushless DC vacuum cleaner motors.

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

Abstract

一种叶轮，应用于无刷吸尘器电机上，叶轮包括下盖板（1），下盖板（1）的中心处向上逐渐形成凸起（5），下盖板（1）的上、下表面均形成弧面（6），叶片（2）固定设置于下盖板（1）的上表面上。该叶轮仅包括下盖板（1）与其上的多个弧形叶片（2），形成半开式叶轮，该叶轮体积相对较小，方便携带，生产成本较低。下盖板（1）的中心处向上凸起形成弧面（6），使得叶轮的结构较为紧凑，有效减小叶轮的体积。叶片（2）与下盖板（1）及中心轴（7）一体加工成型，结构强度较高，使用性能较好。

Description

一种叶轮
本申请要求于2014年06月12日提交中国专利局、申请号为201410261036.5、发明名称为“一种叶轮”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于吸尘器电机转子的加工制造技术领域，具体涉及一种叶轮。
背景技术
吸尘器是利用电机带动叶片高速旋转，在密封的壳体内产生空气负压，从而将尘屑吸入集尘袋中的清洁电器，吸尘器按结构组成一般可分为立式、卧式和便携式等。
吸尘器电机是吸尘器的核心部件，一般由两部分构成，电机部分与风机部分，由于吸尘器电机对转速要求很高，通常在20000-30000转每分钟，因此，常规的吸尘器电机一般采用串激吸尘器电机和小直流吸尘器电机。串激吸尘器电机和小直流吸尘器电机均属于有刷电机，其转速在20000-40000之间，其转速虽然可满足吸尘器电机的要求，但有刷电机体积大，电机风机大，负载大，电机的噪音高。
传统的串激吸尘器电机的叶轮为铝制叶轮，其为封闭式叶轮结构，通常包括上盖板、下盖板、以及设置于上、下盖板间的叶片，材料均采用铝合金，闭式叶轮的工作效率较高，但其制作难度较大，且铝制叶轮的上、下盖板与叶片为组装形成，结构复杂，上下盖板容易松脱损坏，且一般体积较大，质量重，生产成本较高，运转时噪声较大。半开式叶轮与开式叶轮相对闭式叶轮而言其体积相对较小，但其工作效率较低。
而且，一般上下盖板为平板结构，叶片均匀分布于上下盖板之间，为了增加叶轮的工作效率，则必然要增加叶片的长度，这样就需要将上下盖板的面积做大，导致叶轮的整体体积增加。
随着电气行业的发展，吸尘器电机也逐渐向高性能、高效及小型化发展，无刷直流电机以其具备体积小、噪音低、效率高，可靠性好、适应性强等优点在行业内得到越来越广泛的应用。
为了减小吸尘器的整体体积，一般采用无刷电机进行驱动，为了满足 无刷电机的使用需求，一般需将叶轮结构做小，传统的铝制闭式叶轮不再适用于无刷电机，且传统的叶轮结构性能较低，能耗较大，使用成本较高。
因此，鉴于以上问题，有必要提出一种新型的叶轮结构，以满足无刷电机叶轮的使用需求，在保证电机高转速的同时，减小电机的体积，方便携带，提高电机的性能，降低能耗，减小工作噪音，提高环境质量。
发明内容
有鉴于此，本发明提供了一种叶轮，包括一体成型的下盖板与叶片，下盖板中心处向上凸起形成弧面，在下盖板覆盖面积不变的情况下，叶片的长度明显增加，使得叶轮的结构较为紧凑，以满足无刷电机叶轮的使用需求，在保证电机高转速的同时，减小电机的体积，方便携带，提高电机的性能，降低能耗，减小工作噪音，提高环境质量。
根据本发明的目的提出的一种叶轮，应用于无刷吸尘器电机上，所述叶轮的下盖板设计为中心为弧面的结构，并在弧面上设计多个弧形叶片。
可选的，所述叶轮的下盖板中心处向上逐渐凸起，所述下盖板的上、下表面均形成弧面，所述叶片固定设置于所述下盖板的上表面上。
可选的，所述叶轮还包括中心轴，所述中心轴上设置有轴孔，所述下盖板以所述中心轴为中心，并固定连接于所述中心轴的外壁上。
可选的，所述下盖板连接于所述中心轴外壁的中间位置处。
可选的，所述叶片以所述中心轴为中心呈阵列分布，并自中心轴外壁延伸至下盖板的边缘处。
可选的，所述叶片、下盖板以及所述中心轴一体成型。
可选的，所述叶片的顶部倒圆角。
可选的，所述叶片上方设置有叶轮罩，所述叶轮罩的中心处开设有进风口，所述叶片与所述叶轮罩间隙配合。
可选的，所述叶轮罩与所述叶片相对的内侧向中心处内凹形成弧面，所述叶片转动后外缘形成的弧面与所述叶轮罩内侧的弧面平行匹配，当所述叶轮罩装配到所述叶片上方后，所述叶轮罩与所述叶片成间隙配合。
与现有技术相比，本发明公开的叶轮的优点是：
1、该叶轮适用于高真空、高转速无刷直流吸尘器电机。
2、该叶轮仅包括下盖板与其上的多个弧形叶片，形成半开式叶轮，该叶轮体积相对较小，方便携带；材料使用量少，生产成本较低。下盖板的中心处向上凸起形成弧面，在下盖板覆盖面积不变的情况下，叶片的长度明显增加，使得叶轮的结构较为紧凑，有效减小叶轮的体积，且在电机高速运转时叶片不会变形或断裂，提高叶轮的使用寿命。
3、叶片上方设置有叶轮罩，叶片与叶轮罩为间隙配合，叶轮罩在该结构中同时起到上盖板的作用，其与下盖板以及叶片间组成闭式叶轮结构，在减小电机体积的同时，又保证了叶轮的工作效率，满足电机小体积、高转速的使用需求。
4、叶片与下盖板及中心轴一体加工成型，结构强度较高，使用性能较好，避免了盖板与叶片间的松脱损坏，提高叶轮的使用寿命。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明公开的一种叶轮的示意图；
图2为本发明公开的一种叶轮的剖视图；
图3为叶片与叶轮罩间隙配合简图；
图4为叶轮的爆炸图。
图中的数字或字母所代表的相应部件的名称：
1、下盖板 2、叶片 3、叶轮罩 4、进风口 5、凸起 6、弧面 7、中心轴 8、轴孔。
具体实施方式
传统的吸尘器电机的叶轮为铝制叶轮，其为封闭式叶轮结构，通常包括上盖板、下盖板、以及设置于上、下盖板间的叶片，闭式叶轮的工作效率较高，但其制作难度较大，且铝制叶轮的上、下盖板与叶片为组装形成， 结构复杂，上下盖板容易松脱损坏，且一般体积较大，质量重，生产成本较高，运转时噪声较大。而且，一般上下盖板为平板结构，叶片均匀分布于上下盖板之间，为了增加叶轮的工作效率，则必然要增加叶片的长度，这样就需要将上下盖板的面积做大，导致叶轮的整体体积增加。
本发明针对现有技术中的不足，提供了一种叶轮，包括一体成型的下盖板与叶片，下盖板中心处向上凸起形成弧面，在下盖板覆盖面积不变的情况下，叶片的长度明显增加，使得叶轮的结构较为紧凑，以满足无刷电机叶轮的使用需求，在保证电机高转速的同时，减小电机的体积，方便携带，提高电机的性能，降低能耗，减小工作噪音，提高环境质量。
根据本发明的目的提出的一种叶轮，应用于无刷吸尘器电机上，叶轮的下盖板设计为中心为弧面的结构，并在弧面上设计多个弧形叶片。
可选的，所述叶轮的下盖板中心处向上逐渐凸起，所述下盖板的上、下表面均形成弧面，所述叶片固定设置于所述下盖板的上表面上。
可选的，所述叶轮还包括中心轴，所述中心轴上设置有轴孔，所述下盖板以所述中心轴为中心，并固定连接于所述中心轴的外壁上。
可选的，所述下盖板连接于所述中心轴外壁的中间位置处。
可选的，所述叶片以所述中心轴为中心呈阵列分布，并自中心轴外壁延伸至下盖板的边缘处。
可选的，所述叶片、下盖板以及所述中心轴一体成型。
可选的，所述叶片的顶部倒圆角。
可选的，所述叶片上方设置有叶轮罩，所述叶轮罩的中心处开设有进风口，所述叶片与所述叶轮罩间隙配合。
可选的，所述叶轮罩与所述叶片相对的内侧向中心处内凹形成弧面，所述叶片转动后外缘形成的弧面与所述叶轮罩内侧的弧面平行匹配，当所述叶轮罩装配到所述叶片上方后，所述叶轮罩与所述叶片成间隙配合。
下面将通过具体实施方式对本发明的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请一并参见图1、图2，如图所示，一种叶轮，应用于无刷吸尘器电机 上，叶轮包括下盖板1，下盖板1上设置有多个弧形叶片2。叶轮的下盖板1中心处向上逐渐形成凸起5，下盖板1的上、下表面均形成弧面6，叶片固定设置于下盖板1的上表面上。通过将下盖板1的中心处向上凸起形成弧面6，在下盖板1覆盖面积不变的情况下，叶片2的长度明显增加，使得叶轮的结构更为紧凑，有效减小叶轮的体积，且在电机高速运转时叶片2不会变形或断裂，提高叶轮的使用寿命。
叶轮还包括中心轴7，中心轴7上设置有轴孔8，下盖板1以中心轴7为中心，并固定连接于中心轴7的外壁上。叶片2以中心轴7为中心呈阵列分布，并自中心轴7外壁延伸至下盖板1的边缘处。
通过设置中心轴7，并以中心轴7为基准固定设置下盖板1与叶片2，提高了叶轮的结构强度及稳定性，风机的转轴通过轴孔8插入与叶轮连接，提高连接处的结构强度，实现叶轮运转的稳定性。
下盖板1连接于中心轴7外壁的中间位置处，且叶片2、下盖板1以及中心轴7一体成型。传统的叶轮需先将上下盖板与叶片冲压成型，后进行组装，工艺复杂，效率低下，本发明通过采用注塑成型方式，一体成型出叶轮，生产加工方便，生产效率高，且叶轮的结构强度较好。
叶片2的顶部倒圆角。通过将叶片2的两面相交处的进行倒圆角处理，使得叶片2整体呈流线型结构，进风流畅，工作效率较高。同时可减少灰尘的堆积，保证叶轮内部的清洁，提高叶轮的使用寿命。
请参见图3与图4，如图所示，叶片2上方设置有叶轮罩3，叶轮罩3的中心处开设有进风口4，叶片2与叶轮罩3间隙配合。叶轮工作时，外部气流经进风口4处进入叶轮内，后进入叶轮后端对电机线路板及绕组进行冷却处理。
叶轮罩3与叶片2相对的内侧向中心处内凹形成弧面6，叶片2转动后外缘形成的弧面与叶轮罩内侧的弧面6平行匹配，当叶轮罩3装配到叶片2上方后，叶轮罩3与叶片2成间隙配合。
叶轮罩3在该结构中同时起到上盖板的作用，其与下盖板1以及叶片2间组成闭式叶轮结构，在减小电机体积的同时，又保证了叶轮的工作效率，满足电机小体积、高转速的需求。
本发明公开了一种叶轮，应用于无刷吸尘器电机上，叶轮包括下盖板， 下盖板的中心处向上逐渐凸起，下盖板的上、下表面均形成弧面，叶片固定设置于所述下盖板的上表面上。该叶轮仅包括下盖板与其上的多个弧形叶片，形成半开式叶轮，该叶轮体积相对较小，方便携带；材料使用量少，生产成本较低。下盖板的中心处向上凸起形成弧面，在下盖板覆盖面积不变的情况下，叶片的长度明显增加，使得叶轮的结构较为紧凑，有效减小叶轮的体积，且在电机高速运转时叶片不会变形或断裂，提高叶轮的使用寿命。
叶片上方设置有叶轮罩，叶片与叶轮罩为间隙配合，叶轮罩在该结构中同时起到上盖板的作用，其与下盖板以及叶片间组成闭式叶轮结构，在减小电机体积的同时，又保证了叶轮的工作效率，满足电机小体积、高转速的使用需求。
叶片与下盖板及中心轴一体加工成型，结构强度较高，使用性能较好，避免了盖板与叶片间的松脱损坏，提高叶轮的使用寿命。
该叶轮适用于高真空、高转速无刷直流吸尘器电机。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (9)

  1. 一种叶轮，应用于无刷吸尘器电机上，其特征在于，所述叶轮的下盖板设计为中心为弧面的结构，并在弧面上设计多个弧形叶片。
  2. 如权利要求1所述的叶轮，其特征在于，所述叶轮的下盖板中心处向上逐渐凸起，所述下盖板的上、下表面均形成弧面，所述叶片固定设置于所述下盖板的上表面上。
  3. 如权利要求2所述的叶轮，其特征在于，所述叶轮还包括中心轴，所述中心轴上设置有轴孔，所述下盖板以所述中心轴为中心，并固定连接于所述中心轴的外壁上。
  4. 如权利要求3所述的叶轮，其特征在于，所述下盖板连接于所述中心轴外壁的中间位置处。
  5. 如权利要求3所述的叶轮，其特征在于，所述叶片以所述中心轴为中心呈阵列分布，并自中心轴外壁延伸至下盖板的边缘处。
  6. 如权利要求3所述的叶轮，其特征在于，所述叶片、下盖板以及所述中心轴一体成型。
  7. 如权利要求1所述的叶轮，其特征在于，所述叶片的顶部倒圆角。
  8. 如权利要求2所述的叶轮，其特征在于，所述叶片上方设置有叶轮罩，所述叶轮罩的中心处开设有进风口，所述叶片与所述叶轮罩间隙配合。
  9. 如权利要求8所述的叶轮，其特征在于，所述叶轮罩与所述叶片相对的内侧向中心处内凹形成弧面，所述叶片转动后外缘形成的弧面与所述叶轮罩内侧的弧面平行匹配，当所述叶轮罩装配到所述叶片上方后，所述叶轮罩与所述叶片成间隙配合。
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