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Pump

An impeller and cylinder technology, applied in the field of small pumps, can solve problems such as acceleration and shortening of pump life.

Inactive Publication Date: 2009-07-22
MATSUSHITA ELECTRIC WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in response to these demands, if the impeller 101 is rotated at a high speed, the wear of the bearing 108 integrated with the impeller 101 when sliding along the outer periphery of the shaft 107 is accelerated, and as a result, the life of the pump is shortened.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 It is the structure of the pump of Embodiment 1 of the present invention, figure 2 is the bottom view of the pump, image 3 is a perspective view of the impeller.

[0032] In these figures, 1 is an impeller having a cylindrical portion 1a and an upper wall 1b, and the impeller 1 has a plurality of blades 2 on the outer peripheral upper side of the cylindrical portion 1a, and has a rotor magnet 3 on the inner periphery of the cylindrical portion 1a. . In addition, a bearing 8 made of, for example, carbon is provided at the center of the upper surface wall 1b. The bearing 8 is formed in a cylindrical shape, and its inner diameter is set so as to ensure a slight clearance (for example, in the range of 0.05 mm to 1.0 mm) with the outer circumference of the shaft 7 described later.

[0033] Here, in the impeller 1, the blade 2 and the rotor magnet 3 may be formed of different materials and integrally formed by fitting them, or the blade 2 and the rotor magnet ...

Embodiment 2

[0044] Figure 4 It is a cross-sectional view showing the structure of a pump according to Embodiment 2 of the present invention.

[0045] In Embodiment 2, the same reference numerals as in Embodiment 1 are attached to the same configuration and effect as in Embodiment 1, and the description of Embodiment 1 is referred to for the detailed description.

[0046] The difference between the pump of the second embodiment and the first embodiment is that the separation plate 6 facing the outer peripheral surface 1A of the cylindrical portion 1 a of the impeller 1 is not provided with the outer peripheral surface 1A of the cylindrical portion 1 a of the impeller 1 . The point that the dynamic pressure generating groove 12 is provided on the inner cylindrical surface 6A of the separator in the annular groove portion 6b of the . The shape and the like of the dynamic pressure generating groove 12 are the same as those of the first embodiment.

[0047] Based on the above differences, t...

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PUM

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Abstract

The utility model provides a pump, which minimally restrains the abrasion between the bearing and the axis, and achieves rotation in high speed simultaneously. The utility model has a vane wheel(1), the outer side of the cylinder part(1a) is provided with a plurality of vanes(2), and the inner side of the cylinder part(1a) is provided with a rotor magnet(3); a dynamo stator(4), which is arranged on the inner side of the rotor magnet(3) and is used for driving the vane wheel(1) to rotate; a spacer plate(6) which airtightly separates the vane wheel(1) and the dynamo stator(4); a pump shell(5) which is provided with a suction inlet(9) and a water outlet(10) which are used for sucking and draining liquid. A dynamic pressure producing groove(12) which is beneficial for the dynamic pressure production by the rotation of the vane wheel(1) is arranged on at least one of the outer side surface(1A) of the cylinder part(1a) of the vane wheel(1) and the cylinder surface(6A) of the spacer plate(6) which is opposing with the outer side surface(1A) of the vane wheel(1).

Description

technical field [0001] The present invention relates to small pumps driven by electric motors, for example for sucking in refrigerant or liquids such as methanol or water and discharging them. Background technique [0002] In recent years, for example, refrigerant-type cooling systems for cooling electronic components such as CPUs by circulating a refrigerant, and fuel cells for small devices have attracted attention. Refrigerant circulation pumps used in such refrigerant cooling systems or methanol transport pumps used in fuel cells are often limited by the space to be installed, so there are demands for miniaturization and thinning, and requirements for high performance. The demands are high. [0003] Figure 5 It is a cross-sectional view showing an example of a conventional pump of this type (for example, refer to Patent Document 1), Figure 6 is the bottom view of the pump casing. [0004] exist Figure 5 , Figure 6 In the shown pump, 101 is an impeller, a pluralit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/06F04D29/00F04D29/42F04D29/22F04D5/00
Inventor 福田哲也
Owner MATSUSHITA ELECTRIC WORKS LTD