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A type of elliptical tooth profile rotor oil pump, its rotor and rotor design method

A kind of ellipse and tooth profile technology, applied in mechanical equipment, rotary piston pumps, rotary piston machines, etc., to reduce wear and energy consumption, improve wear, and reduce modification costs

Inactive Publication Date: 2017-06-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the improvement of flow, wear and noise performance requirements, ordinary elliptical rotor pumps can no longer meet the existing needs

Method used

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  • A type of elliptical tooth profile rotor oil pump, its rotor and rotor design method
  • A type of elliptical tooth profile rotor oil pump, its rotor and rotor design method
  • A type of elliptical tooth profile rotor oil pump, its rotor and rotor design method

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Embodiment Construction

[0060] Such as Figure 2-5 As shown, a design method for a similar elliptical tooth profile rotor includes the following steps:

[0061] Step (1), determining the ellipse-like theoretical tooth profile of the outer rotor;

[0062] Take one tooth profile center O of an elliptical outer rotor with the same basic design parameters T is the tooth profile center of the quasi-elliptic outer rotor, constructing its theoretical tooth profile; in the outer rotor center O 1 As the center of the circle, the Cartesian coordinate system O fixed on the outer rotor 1 -(x 1 ,y 1 ), the tooth profile equation of the quasi-elliptic outer rotor is:

[0063]

[0064] In formula (1), x 1 , is the tooth profile abscissa of the quasi-elliptic outer rotor, y 1 is the ordinate of the tooth profile of the quasi-elliptic outer rotor; b is the length of the minor semi-axis of the original elliptical tooth profile; R 1 is the tooth profile center O T to the outer rotor center O 1 distance; α ...

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Abstract

The invention discloses a novel ellipse-like tooth-profile rotor. The ellipse-like tooth-profile rotor comprises an inner rotor and an outer rotor which are meshed each other, wherein the outer rotor has one or more teeth than the inner rotor; the tooth profile of each half tooth of the outer rotor consists of a section of an ellipse-like circular arc, a section of a tooth-bottom circular arc, and a circular arc chamfer which is simultaneously tangent with the ellipse-like circular arc and the tooth-bottom circular arc; the ellipticity of the ellipse-like circular arc is in square-root progressive increase with a tooth profile angle; the tooth profile of each tooth of the inner rotor is the conjugate curve of the tooth profile of the ellipse-like section of the outer rotor; during meshing, each pair of teeth of the inner rotor and the outer rotor are meshed, and meshed lines are closed. Besides, the invention further provides a design method of the ellipse-like tooth-profile rotor, and an oil pump which uses the ellipse-like rotor can be remodeled on the basis that the design of a conventional pump body is not changed, so that the remodeling cost is reduced. Besides, on the basis that the flow of the oil pump at a low speed is increased, the maximum value of a tooth-profile sliding rate at meshed boundary points, and the torque generated by oil fluid on the inner rotor are reduced; the flow performance of the rotor pump is improved; the wear is reduced, and energy sources are saved.

Description

technical field [0001] The invention belongs to the technical field of oil pumps, and in particular relates to an oil pump with an elliptical profile rotor, a rotor thereof, and a design method of the rotor. Background technique [0002] According to the structure, the oil pump is mainly divided into external gear type oil pump, internal meshing rotor type oil pump and plunger pump. continuous cycle. Rotor oil pumps used in automobiles and construction machinery mostly use elliptical tooth profiles. [0003] The outer rotor of the existing elliptical rotor oil pump has an meshing boundary point somewhere on the tooth profile, and the sliding rate near the meshing boundary point is very large and the wear is relatively high. The outer rotor tooth profile before the meshing boundary point participates in meshing, and the outer rotor tooth profile behind the meshing boundary point does not participate in meshing. Such as figure 1 As shown, the tooth profile of the outer rot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/10F16N13/20
Inventor 蔡皓霍鹏光鄂加强邓元望
Owner HUNAN UNIV
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