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Variable displacement dual vane pump

a dual-vane, variable-discharge technology, applied in the direction of liquid fuel engines, machines/engines, rotary piston liquid engines, etc., can solve the problems of significant torque loss, wear between the vanes, and wear caused by wear

Inactive Publication Date: 2010-05-13
SLW AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is a type of pump that can adjust the amount of fluid it displaces. It has an inner rotor with slots and vanes that fit into those slots. The pump also has an outer rotor with recesses that can hold the vanes. The pump has an expandable chamber and an eccentric ring. The housing of the pump has an eccentric ring to adjust the relationship between two axes, which changes the displacement of the pump. The technical effect of this invention is a pump that can easily adjust its displacement, making it more versatile and efficient."

Problems solved by technology

Current designs for sliding vane pumps have several disadvantages, the most common of which relates to the wear that occurs between the vanes and the eccentric ring as the vanes slide in the ring.
The wear is caused by drag between the vane tips and inner surface of the ring.
This can cause a significant amount of torque loss.
Another problem can be contamination within the pump which can affect reliability.

Method used

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  • Variable displacement dual vane pump
  • Variable displacement dual vane pump
  • Variable displacement dual vane pump

Examples

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Embodiment Construction

[0019]The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

[0020]Referring to the Figures generally, a sliding vane pump according to the present invention is generally shown at 10. The pump 10 has an inner rotor 12 which rotates about a first axis 14. The inner rotor 12 also has a series of slots 16 for receiving a plurality of vanes 18. The vanes 18 have a first side 20 which is offset and parallel to a second side 22. The vanes 18 also have a third side 21 which is parallel to and equal in length compared to a fourth side 23. Both the third side 21 and fourth side 23 serve as a flat engagement 24. The vane 18 also includes an extension 26 which is of a reduced width compared to the remainder of the vane 18. The pump 10 also has an outer rotor 28 which rotates about a second axis 30, and has recesses 32 for receiving the flat engagements 24 of the vanes 18.

[0021]The first s...

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PUM

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Abstract

The present invention is a variable displacement pump having an inner rotor rotatable about a first axis and having at least two slots. The pump also has at least two vanes, each located in a distinct one of the at least two slots. The pump also has an outer rotor rotatable about a second axis, operably associated with the inner rotor, the outer rotor having two or more recesses, each configured to receive one of the vanes. The pump also includes an expandable chamber formed by the outer rotor and the inner rotor, an eccentric ring surrounding the outer rotor, and a housing. The eccentric ring is located within the housing for adjusting the relative relationship between the first axis and the second axis in order to vary the displacement of the pump.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a PCT International Application of U.S. Patent Application No. 60 / 922,683 filed on Apr. 10, 2007. The disclosure of the above application is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to sliding vane pumps; more particularly, the present invention relates to sliding vane pumps having a stacked integrated vane configuration.BACKGROUND OF THE INVENTION[0003]Sliding vane pumps are commonly used to transfer fluid from an inlet port to an outlet port. Typically, they have a ring which is eccentric, and an inner rotor; the inner rotor is typically fixed to and rotates with a shaft, and a series of vanes slide in and out of a set of vane slots. As the vanes rotate with the inner rotor, the vanes will slide along the inner surface of the eccentric ring. The eccentricity between the inner rotor and the eccentric ring can be varied to vary the amount of fluid that is displaced by t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04C14/18F04C2/344
CPCF04C14/226F04C2/348
Inventor GUO, CHENGYUN
Owner SLW AUTOMOTIVE