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Hydraulic torque converter two-dimensional blade profile construction method based on Bezier curve

A Bezier curve and torque converter technology, applied in the field of vehicle transmission system, can solve the problems of poor hydraulic characteristics of blades, discontinuous second derivative and curvature of blade profile, poor adaptability and flexibility, etc.

Active Publication Date: 2015-05-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

The traditional two-dimensional blade modeling method has poor adaptability and flexibility, and the second derivative and curvature of the blade shape line are discontinuous, resulting in poor hydraulic characteristics of the blade

Method used

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  • Hydraulic torque converter two-dimensional blade profile construction method based on Bezier curve
  • Hydraulic torque converter two-dimensional blade profile construction method based on Bezier curve
  • Hydraulic torque converter two-dimensional blade profile construction method based on Bezier curve

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Embodiment Construction

[0060] The present invention provides a method for constructing a two-dimensional blade line shape of a hydraulic torque converter based on a Bezier curve, the core idea of ​​which is to construct the bone line and slice thickness distribution of the blade through the Bezier curve, and superimpose the thickness distribution on On the blade bone line, the two-dimensional blade shape line is obtained, which can improve the flexibility and adaptability of the blade shape.

[0061] The impeller of hydraulic torque converter comprises pump wheel, turbine wheel and guide wheel, and its form has axial flow wheel, radial flow wheel, mixed flow wheel, and the two-dimensional blade profile line of impeller of different forms all can adopt the Bezier curve method that the present invention proposes To construct, its construction method is the same.

[0062] The following only takes the structure of the pump impeller blade as an example, combined with the attached figure 1 Specifically int...

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Abstract

The invention discloses a hydraulic torque converter two-dimensional blade profile construction method based on a Bezier curve. The Bezier curve is used for hydraulic torque converter blade design. After a circulating cycle of a hydraulic torque converter is given, two sections of cubic Bezeir curve control point matrixes are used for constructing a unit blade profile centerline control point matrix and a unit blade thickness distribution control point matrix, the constructed unit blade profile centerline control point matrix is rotated and amplified to obtain a practical blade profile centerline control point matrix, and meanwhile the unit blade thickness distribution control point matrix is amplified to obtain a practical blade thickness distribution control point matrix; after the practical blade profile centerline control point matrix and the practical blade thickness distribution control point matrix are obtained, the cubic Bezeir curve is used for constructing a blade profile centerline and practical blade thickness distribution, and finally the obtained practical blade thickness distribution is overlapped on the obtained practical blade profile centerline to obtain a final two-dimensional blade profile. Design robustness, adaptability and flexibility of the two-dimensional blade profile can be enhanced, and design parameters are simple and visual.

Description

technical field [0001] The invention relates to the field of vehicle transmission systems, in particular to a method for constructing a two-dimensional blade profile of a hydraulic torque converter based on Bezier curves. Background technique [0002] The cascade system design is the core of the torque converter design, which directly affects the performance of the torque converter. [0003] The traditional design method of hydraulic torque converter cascade is circulation distribution method or equiangular transformation method based on one-dimensional beam flow theory. The basic design idea of ​​the circulation distribution method is that every time the same arc length is increased between the two element lines on the middle streamline of the circulation circle, the liquid flow along the middle streamline of the blade should increase the same circulation, so as to ensure a good flow state in the flow channel. Using this method to design the blade is related to the angle o...

Claims

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Application Information

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IPC IPC(8): F16H41/28
CPCF16H41/28
Inventor 刘城闫清东魏巍柯志芳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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