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Air feeding device

A technology of air supply device and impeller, which is applied to the parts of the pumping device for elastic fluid, engine function, engine working fluid, etc., which can solve the problem of high efficiency of the air supply device and the non-integrated structure of the magnetic rotating body , It is not easy to reduce the thickness of the air supply device, etc., and achieve the effect of improving air supply efficiency and stable characteristics

Inactive Publication Date: 2012-05-09
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the fluid axial flow pressure-feeding device disclosed in Patent Document 1, the guide vane and the magnetic rotating body as the impeller are not integrally structured.
In addition, in the devices disclosed in Patent Documents 2 and 3, the structure that the bell mouth and the rotor and the impeller are integrated is not disclosed.
[0010] In the conventional air blower, it was difficult to increase the efficiency of the air blower due to the suction resistance of the motor housing part and the leakage from the inside of the machine to the suction port. In addition, it was not easy to realize the high efficiency of the air blower because the motor was placed in the center of the impeller. Overall thinning of the air supply unit
Even if you want to reduce the overall thickness of the air blower by reducing the thickness of the motor, it is difficult to achieve high efficiency and low noise at the same time because the motor housing is located in the center of the impeller.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] figure 1 It is a longitudinal sectional view showing the blower device according to Embodiment 1 of the present invention. Air supply device of the present invention, as figure 1 As shown, an impeller 1 integrated with a bell mouth for sucking air, and a motor for rotating the impeller 1 are provided. The motor has an annular rotor 3 fixed on the impeller 1 side, and an annular stator 4 fixed on the device frame side. A bearing 5 is arranged between the trumpet-integrated impeller 1 and the fixed end 7 of the air blower, and the impeller 1 can rotate inside the fixed end 7 of the air blower by means of the bearing 5 . When the impeller 1 rotates, the air is sucked in from the suction port 2 to blow air.

[0035] The bearing 5 includes an inner ring 5a on the radially inner side, an outer ring 5b on the outer side in the radial direction, and spherical rolling elements 5c arranged between the two rings. The inner ring 5a and the outer ring 5b of the bearing 5 are r...

Embodiment 2

[0038] image 3 It is a longitudinal sectional view showing an air blower according to Embodiment 2 of the present invention. image 3 The blower shown in the figure includes an impeller 1 integrated with a bell mouth for sucking air, and a motor that rotates the impeller 1 . The motor has a rotor 3 fixed on the impeller side and a stator 4 fixed on the blower side, and its structure is the same as that of the first embodiment. A bearing 5 is disposed between the bell mouth integrated impeller 1 and the fixed end 7 of the air blower, and the bell mouth integrated impeller 1 is rotatable relative to the fixed end 7 of the air blower.

[0039] The bearing 5 in this embodiment includes an axially inner inner ring 5d, an axially outer outer ring 5e, and spherical rolling elements 5f arranged between the two rings. The inner ring 5d of the bearing 5 is arranged corresponding to the stator 4 on the air intake side. The end of the bell mouth integrated impeller 1 is installed on t...

Embodiment 3

[0041] Figure 4 It is a longitudinal sectional view showing an air blower according to Embodiment 3 of the present invention. image 3 The air blower of Example 3 shown includes an impeller 1 integrated with a bell mouth for sucking air, and a motor for rotating the impeller. The motor has a rotor 3 fixed on the impeller side and a stator 4 fixed on the blower side. The other structures are the same as those of Embodiment 1 and Embodiment 2. An impeller support shaft 21 is provided at the center of the impeller 1 , and bearings 5 ​​, 5 are disposed on the impeller support shaft 21 . Each bearing 5 has an inner ring 5g, an outer ring 5h, and rolling elements 5i arranged between the two rings. On the outer ring of the bearing 5, a metal mesh and an impeller support portion 20 for preventing the inflow of foreign matter is disposed.

[0042] Figure 5 yes Figure 4 Top view of Example 4 shown. On the air intake side, a concentric circular metal mesh is installed to preven...

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Abstract

The present invention provides a thin type air feeding device which has higher efficiency and can be miniaturized. In the air feeding device of the invention, an impeller and a bell mouth which guidesthe flowing of the air brought by the impeller are integrated for forming a bell-mouth integrated impeller (1). A motor which drives the rotation of the impeller (1) is provided with a rotor (3) equipped at the side of the impeller (1) and a stator (4) equipped at a fixed end (7). In the bell-mouth integrated impeller (1), no clearance exists between a bell mouth part (1a) and an impeller part (1b), therefore the incontinuous guiding to the air flowing is eliminated and no air leaked through the clearance exists. The enlargement loss in the air current is reduced and a high efficiency is obtained. Additionally, no characteristic variation caused by the clearance exists and therefore the air feeding efficiency is stable. As the axial length of the motor is reduced, a small-size air feedingdevice can be obtained.

Description

technical field [0001] The present invention relates to an air blower as a device for blowing air, or an air blower incorporated in a part of a machine as an air blower mechanism. Background technique [0002] Conventionally, most air blowers have a structure in which a motor is disposed in the center of the impeller. In the air blower with such a structure, the impeller has a portion for accommodating the motor, and this portion forms resistance to the inflowing fluid, so that the efficiency of the air blower is low. In addition, the inflow resistance can be reduced by reducing the projected area of ​​the motor housing portion viewed from the air blowing direction, but as a result, the overall height of the device is increased. [0003] Thus, it is difficult to improve the efficiency of the device while reducing the overall thickness of the device. In addition, there is inevitably a gap between the rotating impeller and the bell mouth fixed on the device frame. Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/32F04D29/056
CPCF04D29/002F04D29/30F04D29/403F04D29/441F04D29/663F04D29/667F04D29/703F05D2210/12F05D2260/60Y10S415/00
Inventor 德永太一佐藤博利
Owner HITACHI IND EQUIP SYST CO LTD