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Blowing machine motor

A blower and motor technology, applied in the direction of electromechanical devices, mechanical equipment, control of mechanical energy, etc., can solve problems such as gas leakage

Inactive Publication Date: 2007-09-19
JOHNSON ELECTRIC SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High air pressure in the impeller cavity causes gas leaks between the diffuser and the fan end bracket

Method used

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  • Blowing machine motor
  • Blowing machine motor
  • Blowing machine motor

Examples

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Embodiment Construction

[0013] A bypass duct blower motor assembly used, for example, in a wet and dry vacuum cleaner is shown in partial section in FIG. The motor assembly can be divided into a motor section and a blower section. The motor section is constituted by a general motor 10 . The blower section 11 includes a centrifugal fan type high speed impeller 12 located in an impeller chamber 13 partially defined by an impeller housing 14 .

[0014] Since the general motor and the blower are of known construction, their construction and operation will not be described in detail here except as necessary to explain the present invention.

[0015] The universal motor has a shaft 15 supported in bearings 16 and 17 . The bearing 16 located adjacent to the impeller cavity 13 is accommodated in a boss 18 forming a fan end bracket 20 . An oil seal 19 seals the opening of the shaft inside the boss 18 . The fan end bracket 20 has a substantially radially extending flange 21 to which the impeller housing 14...

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PUM

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Abstract

A bypass blower motor assembly having a motor section 10 and a blower section 11 separated by an end bracket 20 which has through openings. The openings are sealed by a diffuser plate 22 using a labyrinth seal and two O-rings 41, 42.

Description

technical field [0001] The present invention relates to a blower motor, and more particularly to a blower motor for a bypass or wet vacuum cleaner. Background technique [0002] The blower motor of a bypass vacuum cleaner has an impeller for driving air from the inlet to the outlet of an impeller housing mounted on the motor without passing it through the motor itself. This structure allows the vacuum cleaner to pick up dust and dirt while also picking up liquids without damaging the electric motor [0003] The impeller is mounted on a shaft of the motor. The shaft is supported on a bearing that passes through a fan end bracket of the motor case, which also serves as a spacer between the motor and the impeller. The bearing is sealed and an additional seal may also be provided between the shaft and the fan end bracket to avoid gas leakage through the bearing from the impeller case to the motor. The fan end bracket separates the motor from the impeller case and separates th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/00H02K5/12H02K5/124H02K7/14A47L9/00A47L5/22F04D29/08F04D29/42
CPCF04D29/083A47L5/22
Inventor 潘广业谭少振
Owner JOHNSON ELECTRIC SA