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Planetary roller screw pair transmission efficiency calculation method

A technology of transmission efficiency and planetary rollers, which is applied in the field of calculation of transmission efficiency of planetary roller screw pairs, can solve the problems of large deviation of calculation results and failure to consider friction loss, etc., and achieve the effect of wide application prospects

Pending Publication Date: 2022-03-04
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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Problems solved by technology

The calculation method based on the force balance analysis only considers the influence of the structural parameters of the roller screw pair on the efficiency, and ignores the distribution of the roller load and the influence of the load size on the transmission efficiency of the screw pair, while the calculation method based on friction loss ignores The difference in the contact state between the screw side and the nut side is considered, and the friction loss caused by the different speeds at the contact point between the roller and the screw on the screw side is not taken into account, resulting in a large deviation in the calculation results

Method used

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  • Planetary roller screw pair transmission efficiency calculation method
  • Planetary roller screw pair transmission efficiency calculation method
  • Planetary roller screw pair transmission efficiency calculation method

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Embodiment 1

[0151] The basic structural parameters of the planetary roller screw pair used in this embodiment are shown in Table 1, and other parameters used in the calculation process are shown in Table 2; the number of heads is used to calculate the thread lead.

[0152] Table 1 Basic structural parameters of planetary roller screw pair

[0153] parameter screw roller nut Nominal radius r i / mm

15 5 25 number of heads n i

5 1 5 Pitch p i / mm

1 1 1 Tooth half angle β i / °

45 45 45 Roller profile radius r R / mm

- 7.0711 -

[0154] Table 2 other parameters

[0155]

[0156] According to the parameters in Table 1 and Table 2, using the calculation method of the fundamental invention, the contact parameters of the contact points on the side of the roller screw are calculated as shown in Table 3. In addition, the speed ratio coefficient K=0.99925, and the calculation results of each power are shown in Table 4 ...

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Abstract

The invention discloses a planetary roller screw pair transmission efficiency calculation method, which fully considers the influence of factors such as non-uniform thread load distribution and relative sliding between a roller and a screw on the transmission efficiency of a planetary roller screw pair on the basis of solving a roller load distribution rule and an accurate position of a contact point. The transmission efficiency of the planetary roller screw pair and the influence rule of each influence factor on the transmission efficiency can be calculated more accurately, and the method has a wide application prospect in the technical field of mechanical transmission mechanisms.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission mechanisms, and relates to a method for calculating the transmission efficiency of a planetary roller screw pair. Background technique [0002] Planetary roller screws have outstanding advantages such as high precision, high load capacity, and long life, but the lack of transmission efficiency has always restricted the development of roller screws. In recent years, more and more scholars have realized the urgency of improving transmission efficiency, and have gradually carried out relevant theoretical research on improving transmission efficiency. However, transmission efficiency, as one of the important indicators considered in practical production applications, has many influencing factors. [0003] At present, the methods for solving the efficiency of planetary roller screw transmission can be divided into two categories: solving efficiency based on force balance analysis and s...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F17/11F16H25/22G06F111/10G06F119/06G06F119/14
CPCG06F30/17G06F17/11F16H25/2247F16H25/2252G06F2119/14G06F2119/06G06F2111/10
Inventor 陈中郑继贵侍威黄玉平张兆晶郭亚星何理论袁瑞贤
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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