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Circumferential flow pump

A technology of circle and pump chamber, which is applied in the field of circle flow pump to achieve the effect of improving efficiency

Inactive Publication Date: 2011-05-04
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional peripheral flow pumps have the above-mentioned structure. When the fuel pumped from the peripheral flow pump to the internal combustion engine decreases, etc., the pressure near the discharge port of the pump seat rises, and the impeller Due to the pushing force on the pump cover side, the impeller rotates while contacting the pump cover or the pump base to increase the sliding resistance, and the operating current of the electric drive motor that rotates the impeller increases, and the discharge volume decreases at the same time. The problem of reducing the fuel delivered by the flow pump to the internal combustion engine

Method used

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Examples

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Embodiment Construction

[0017] Embodiment 1

[0018] figure 1 It is a partial longitudinal cross-sectional view showing a fuel supply device having a circumferential flow pump according to Embodiment 1 of the present invention, figure 2 Yes means forming figure 1 An enlarged perspective view of the appearance of the impeller of the circular flow pump, image 3 Yes means figure 1 An enlarged longitudinal sectional view of the main part of the circular flow pump, Figure 4 Yes means figure 1 A characteristic diagram of the relationship between the discharge volume of the circumferential flow pump and the groove cross-sectional area ratio of the oil supply channel.

[0019] in figure 1 Among them, for example, a fuel supply device 100 that supplies fuel to an internal combustion engine of a vehicle is composed of a circumferential flow pump 1, an electric drive motor 3 that drives the circumferential flow pump 1, and a discharge port 4 that sends fuel discharged from the circumferential flow pump 1 to th...

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Abstract

The invention discloses a circumferential flow pump. Through designing a first slot cross-section (S1) of a fuel feed channel (5c) at the side where a pump cover (5) exists to be smaller than a second slot cross-section (S2) of a fuel feed channel (6b) at the side where a pump seat (6) exists, the diameter of the vortex produced in the first slot cross-section (S1) is smaller than the diameter ofthe vortex produced in the second slot cross-section (S2), and the fuel pressure of the fuel feed channel (5c) at the side where the pump cover (5) exists is higher than that of the fuel feed channel(6b) at the side where the pump seat (6) exists, thereby thrusting an impeller to the side where the pump seat (6) exists. Adopting the invention, the fuel thrust from the circumferential flow pump to an internal-combustion engine cannot be reduced in the circumferential flow pump when the pressure of the fuel thrust from the circumferential flow pump to the internal-combustion engine is raised, thereby being the circumferential flow pump with high efficiency.

Description

technical field [0001] The present invention relates to a peripheral flow pump that is housed in, for example, a fuel tank of an automobile and pressure-feeds fuel to an internal combustion engine. Background technique [0002] In the conventional peripheral flow pump, as shown in Patent Document 1, the groove cross-sectional area of ​​the annular oil supply passage arranged on the pump cover is made to be the same as the groove of the annular oil supply passage arranged on the pump base. The cross-sectional area is roughly the same, and the size of the space formed in the impeller opposite to the oil supply passage of the pump cover is made to be approximately the same as the space formed in the impeller opposite to the oil supply passage of the pump base, so that the pump cover, pump The pressure in the pump chamber formed by the seat and the impeller is evenly balanced. [0003] [Patent Document 1] Japanese Patent No. 2962828 [0004] The conventional peripheral flow p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D5/00F02M37/08
CPCF04D5/002F04D29/188F05B2250/503F04D5/007
Inventor 小山正浩坂井雄作
Owner MITSUBISHI ELECTRIC CORP