Flow Field Analysis and Optimization for Internal Channel of Hydraulic Manifold Block in Lower Extremity Exoskeleton Robot

WANG Haibo; FAN Shuyuan; ZHANG Long

doi:10.3969/j.issn.0258-2724.20170879

Volume 54 Issue 4

Jul. 2019

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Journal of Southwest Jiaotong University > 2019 > 54(4): 848-854.

WANG Haibo, FAN Shuyuan, ZHANG Long. Flow Field Analysis and Optimization for Internal Channel of Hydraulic Manifold Block in Lower Extremity Exoskeleton Robot[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 848-854. doi: 10.3969/j.issn.0258-2724.20170879

Citation:

WANG Haibo, FAN Shuyuan, ZHANG Long. Flow Field Analysis and Optimization for Internal Channel of Hydraulic Manifold Block in Lower Extremity Exoskeleton Robot[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 848-854. doi: 10.3969/j.issn.0258-2724.20170879

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Flow Field Analysis and Optimization for Internal Channel of Hydraulic Manifold Block in Lower Extremity Exoskeleton Robot

doi: 10.3969/j.issn.0258-2724.20170879

Received Date: 21 Dec 2017
Rev Recd Date: 02 Mar 2018

Available Online: 21 Mar 2018

Publish Date: 01 Aug 2019

Abstract

Abstract

In order to deal with the excessive temperature rise and noise of the hydraulic power unit in the lower extremity exoskeleton robot, ANSYS Fluent software was used for the simulation tests of Z-channel and cross-channel, which are the main components of internal flow channel of the hydraulic manifold block. Furthermore, 5 groups of simulation test with different sizes are designed to analyze how the stability of flow velocity and pressure loss change with channel dimension. The simulation test shows that when the channel diameter is 5 mm, the pressure loss of the cross-channel increases with eccentricity between the inlet and outlet; and the stability of flow velocity is the best when eccentricity is 1.25 mm. The pressure loss of Z-channel reaches the minimum when the distance between inlet and outlet is 17 mm, and the stability of fluid velocity increases with the distance. The optimized prototype test shows that the maximum temperature of the hydraulic manifold block was decreased by 3.3 ℃ and the maximum noise was decreased by 7.6 dB.
- lower extremity exoskeleton,
- hydraulic power unit,
- hydraulic manifold block,
- pressure loss,
- hydraulic noise

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Flow Field Analysis and Optimization for Internal Channel of Hydraulic Manifold Block in Lower Extremity Exoskeleton Robot

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