Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (2): 485-493.doi: 10.13229/j.cnki.jdxbgxb.20230504

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Design and analysis of guide curve of radial piston motor with low argument distribution coefficient

Gao-cheng AN(),Zhen-hua HU,Hong-quan DONG,Bao-yu LIU,Kai GAO,Wen-kang WANG   

  1. School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China
  • Received:2023-05-19 Online:2025-02-01 Published:2025-04-16

Abstract:

Aiming at the problem that the design of the non-pulsating stator curve is limited when the argument distribution coefficient of the inner curve radial piston motor is small, a method for non-pulsating argument distribution according to the principle of argument superposition is proposed. Under the low distribution coefficient, the non-pulsation argument distribution of seven kinds of motion law curves, such as equal acceleration, equal acceleration with transition region, sinusoid, sinusoidal with transition region, parabola, parabola with transition region and uniform acceleration correction equal acceleration were studied. Taking the radial piston motor with six-acting eight-piston inner curve as an example, the influence of distribution result and argument on output characteristics is analyzed by Matlab/Simulink. The results show that : ①This method can realize the non-pulsation angle distribution of each curve with transition zone under low distribution coefficient, and the zero velocity zone should be as small as possible when the working condition is satisfied. ②For the uniform acceleration correction equal acceleration curve, the front and rear correction angles should also be small, and the front correction angle can be larger than the rear correction angle to make the contact stress change more uniform.

Key words: radial piston hydraulic motor, guide curve, low argument distribution coefficient, argument distribution, torque pulsation, contact stress

CLC Number: 

  • TH137.51

Fig.1

Basic structure of the inner curve motor"

Fig.2

Stator curve"

Fig.3

Curve argument distribution diagram with zero velocity zone and transition zone"

Fig.4

Uniform acceleration correction equal acceleration curve angle distribution diagram"

Table 1

Curve argument distribution results"

幅角/(°)曲线
abcdefg
零速区φ00101011
加速区φ5------1
φ115131513151311
φ6------1
过渡区φ2-2-2-22
减速区φ7------1
φ315131513151311
φ8------1

Fig.5

Torque diagram of each stator curve motor"

Fig.6

Acceleration by curve"

Table 2

maximum acceleration and maximum sudden change value"

度加速度曲线
abcdefg
最大值/(mm·rad-2345.8399.0543.2626.7518.7598.5432.2
最大突变值/(mm·rad-2691.6399.000000

Fig.7

Contact stress of each curve"

Fig.8

Influence of zero-velocity zone on maximum acceleration"

Fig.9

Influence of zero-velocity zone on maximum contact stress"

Fig.10

Effect of front and rear correction angles on maximum contact stress in different zero velocity zones"

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