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Pump device

a pump device and pump technology, applied in the direction of piston pumps, pump components, non-positive displacement fluid engines, etc., can solve the problems of deterioration of the life of the pump device and the large size of the pump devi

Inactive Publication Date: 2005-02-03
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a pump device that includes a pump housing, a motor housing, and a shaft with an impeller. The pump device also includes a rotor and a bearing plate for supporting the shaft. The bearing plate has a fluid passage for leading fluid to it. The technical effect of this invention is to provide a pump device that can efficiently pump fluid through the device without causing excessive wear and tear on the components.

Problems solved by technology

According to the above-mentioned structure, however, the piping for leading the fluid to the bearing portion is required to be provided outside of the casing, thereby causing a large size of the pump device.
Then, the foreign matter does not easily come out from the gap, thereby causing a malfunction of the bearing portion, which leads a deterioration of the pump device life.

Method used

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Experimental program
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Effect test

first embodiment

[0014]FIG. 1 is a cross-sectional view showing a structure of a pump device 10 according to the present invention. The pump device 10 may be employed in a vehicle, for example, to a water pump for circulating a fluid (coolant water in this case) between an engine and a radiator (not shown) in an engine room, an oil pump for supplying a fluid for lubrication (oil in this case) to the engine, and the like. The pump device 10 is electrically driven.

[0015] The pump device 10 includes a pump housing 11 made of metal and a motor housing 12 made of resin, which constitute an outer form of the pump device 10. The pump housing 11 includes a fluid chamber 15 to which the fluid is supplied, an intake port 11a through which the fluid is inhaled to flow into the fluid chamber 15, and a discharge port 15c through which the fluid in the fluid chamber 15 is highly pressurized and discharged outside of the pump device 10. In addition, the pump housing 11 includes an opening for leading a part of the...

second embodiment

[0033] the fluid passage 31 is not formed within the bearing plate 13. Instead, a fluid passage 33 (first fluid passage) is formed within the impeller 16.

[0034] The impeller 16 made of resin is insert-molded by a bush 17 made of metal being inserted into a center of the impeller 16. The impeller 16 includes the plurality of blades 16a and a base portion 16c for supporting the blades 16a. The fluid passage 33 is formed in the base portion 16c of the impeller 16, extending in the radial direction of the impeller 16. The fluid passage 33 penetrates into the bush 17. The fluid passage 33 communicates with the second fluid chamber 15b with a higher pressure than the intake port 11a. A filter 35 for preventing the foreign matter from entering into the fluid passage 33 is provided on an outer diameter side thereof.

[0035] A fluid passage 36 (second fluid passage) is formed within the shaft 21 in the radial direction so as to communicate with the fluid passage 33 formed within the impeller...

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Abstract

A pump device includes a pump housing including a fluid chamber for inhaling a fluid flowing through the fluid chamber via an intake port and discharging the fluid to an outside via a discharge port, a motor housing including a stator, and a shaft whose one end projects into the pump housing and to which an impeller is assembled and whose the other end is rotatably supported by a first bearing portion within the motor housing. The pump device also includes a rotor assembled to the shaft and facing the stator, and a bearing plate disposed between the pump housing and the motor housing and including a second bearing portion rotatably supporting the shaft. The bearing plate is formed by a first fluid passage for leading the fluid to the bearing plate.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is based on and claims priority under 35 U.S.C. § 119 to Japanese Patent Application 2003-305542, filed on Aug. 28, 2003, the entire content of which is incorporated herein by reference. FIELD OF THE INVENTION [0002] This invention generally relates to a pump device. More particularly, the invention pertains to a pump device for pressurizing and supplying a fluid by a rotation of an impeller driven by a motor. BACKGROUND [0003] Known pump device circulates a fluid for cooling and lubrication flowing from an intake port through a circulation path by a rotation of an impeller, thereby achieving cooling and lubrication of a predetermined portion. Such a pump device is disclosed in Japanese Patent Laid-Open Publication JP07(1995)-217593A2. The disclosed pump device includes an impeller being rotatably supported on a shaft within a casing. Rotating the impeller by a rotation of the shaft causes the fluid on an intake side (f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04D29/046F04D13/06F04D29/04F04D29/047F04D29/06
CPCF04D29/061F04D29/047
Inventor DEAI, JUNJI
Owner AISIN SEIKI KK