Ellipse-arc compound cycloidal rotor oil pump and its rotor and rotor design method

An elliptical arc and circular arc technology, applied in the design of rotors, ellipse-circular arc compound cycloid rotor oil pump and its rotor field, can solve the problems of normal meshing transmission, speed fluctuation, affecting work efficiency and quality of life, etc.

CN104266063BInactive Publication Date: 2016-09-28HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ellipse-arc compound cycloidal rotor oil pump and its rotor, which comprises an inner rotor and an outer rotor meshing with each other, the number of teeth of the outer rotor is one more than that of the inner rotor, and the tooth profile of each tooth of the outer rotor is It consists of an elliptical arc and a circular arc tangent to the elliptical arc. The arc length of the elliptical arc is from the tooth apex A to the compound point F of the ellipse-circle arc. The arc length of the arc is from the compound point F of the ellipse-circle arc to the tooth The tooth profile of each tooth of the inner rotor is the full conjugate curve of the tooth profile of the outer rotor, and the inner and outer rotors are meshed with a single tooth. At the same time, it also provides the design method of this kind of oil pump rotor, which overcomes the problem of large tooth profile slippage at the meshing boundary point, and solves the problem that the outer rotor of the current elliptic arc cycloid rotor oil pump only participates in part of the tooth profile segment. Meshing, and the problem of meshing impact that is prone to occur, has the advantages of small meshing wear between the inner and outer rotors, good sealing performance, and high volumetric efficiency of the oil pump.
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Description

technical field

[0001] The invention belongs to the technical field of oil pumps, and in particular relates to an ellipse-arc composite cycloidal rotor oil pump, a rotor thereof, and a design method of the rotor. Background technique

[0002] At present, the commonly used oil pump types include gear type and cycloid rotor type. Cycloidal rotor oil pumps can be divided into single tooth difference and multi-tooth difference according to the difference in the number of teeth, and can be divided into arc cycloid rotor oil pumps, elliptic arc cycloid rotor oil pumps and double cycloid rotor oil pumps according to the outer rotor line shape. In the single-tooth difference oil pump, if the number of teeth of the inner rotor is n, the number of teeth of the outer rotor is n+1. The meshing between the inner and outer rotors forms n+1 areas, and the volume of these n+1 areas changes from large to small, and from small to large, to complete oil absorption and oil discharge.

[0003] ...

Examples

Embodiment Construction

[0055] like Figure 3-7 As shown, a design method of an ellipse-arc composite cycloidal rotor includes the following steps:

[0056] Step (1), determine the relationship between the rotor meshing gap Δ and the compound point F of the ellipse-arc;

[0057] Design an elliptical arc from the tooth apex A to the meshing boundary point B on the outer rotor tooth profile of the existing elliptical arc cycloidal oil pump rotor of the same size, and select any point F on this elliptical arc as an ellipse-circular arc compound point, then the tooth profile length between the ellipse-arc compound point F and the meshing boundary point B of the outer rotor elliptical arc segment is make is the arc length from the tooth top vertex A to the meshing boundary point B The arc length from the addendum vertex A to the compound point F of the ellipse-arc difference, that is

[0058] The parametric equation of the elliptical arc section of the outer rotor of the ellipse-arc compound ...