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Fluid pumping system

a pumping system and fluid technology, applied in the direction of liquid fuel engines, machines/engines, mechanical equipment, etc., can solve the problems of turbulence noise, certain disadvantages of conventional motorized air pumps,

Inactive Publication Date: 2007-04-05
DENSO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes different fluid pumping systems that use a vane wheel with a plurality of vane portions. These vane portions are designed to sweep forward, meaning they extend towards the direction of rotation of the vane wheel. The technical effect of this design is that it allows for improved pumping efficiency and reduced energy consumption. The patent also describes a vehicle secondary air supply apparatus for warming a catalyst, which also uses a vane wheel with a plurality of vane portions. This design helps to increase the flow of air and improve the performance of the vehicle's engine.

Problems solved by technology

However, conventional motorized air pumps, such as the pump described in Japanese Patent Publication No. 11-107980 suffer from certain disadvantages.
This produces turbulence noise, and the noise level becomes high in all the frequency bands.
This produces turbulence noise, which is undesirable.
However, conventional fluid pumping systems have not sufficiently reduced this turbulence noise.

Method used

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Experimental program
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first embodiment

Effect of First Embodiment

[0045] As mentioned above, the first and second vane portions 62, 63 are swept-forward blades inclined toward the direction of rotation of the impeller 7. As such, the air inflow angle at which air flows in from the second ends 72 of the first vane portions 62 between the first vane portions 62 substantially agrees with the angle of incline φ of the first vane portions 62. Further, the air inflow angle at which air flows in from the second end 73 of the second vane portions 63 between the second vane portions 63 substantially agrees with the angle of incline φ of the second vane portions 63. As illustrated in FIG. 4B, air smoothly flows toward the first ends 70, 71 of the first and second vane portions 62, 63 without causing substantial separation. Therefore, the production of a turbulent flow due to separation from the suction side (i.e., the second ends 72, 73) of the first and second vane portions 62, 63 can be reduced, and thus turbulence noise can be r...

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Abstract

A fluid pumping system is disclosed that includes a housing in which a fluid flows. The fluid pumping system also includes a vane wheel that is rotatably supported in the housing and that has a plurality of vane portions. At least one of the vane portions is swept-forward such that an axial end of the at least one of the vane portions extends toward the direction of rotation of the vane wheel.

Description

CROSS REFERENCE TO RELATED APPLICATION(S) [0001] The following is based on and claims priority to Japanese Patent Application No. 2005-283759, filed Sep. 29, 2005, which is hereby incorporated in its entirety by reference. FIELD [0002] The present invention relates to a fluid pumping system with an impeller for pumping a fluid. BACKGROUND [0003] Secondary air supply apparatuses have been proposed in which secondary air produced by operating a motorized air pump flows to a three way catalyst converter through a secondary air channel pipe and an engine exhaust pipe to activate a three-way catalyst when an internal combustion engine is started. Japanese Patent Publication No. 11-107980 discloses such a system. A double vane type vortex flow pump (i.e., vortex pump) is usually used as the motorized air pump. The flow pump includes a housing having a pump chamber therein and a vane wheel (i.e., an impeller) that is rotatably mounted in the housing. The vane wheel has multiple vane portio...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D5/00
CPCF04D29/188
Inventor TSUZUKI, KUNIHIROYOKOYAMA, SHINICHISAKATA, MASAKIYASUDA, MASANORI
Owner DENSO CORP