Transactions of Nanjing University of Aeronautics & Astronautics
Optimization Design of Hydraulic Valve Block and Its Internal Flow Channel Based on Additive Manufacturing
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Abstract:
Hydraulic valve block is an important part of the hydraulic system. The traditional hydraulic valve block is made by turning and milling， drilling and boring， which leads to many right-angle bending and closed cavity structure of process holes in its internal flow channel， seriously affecting the flow performance of oil. Based on the new design space provided by additive manufacturing technology， the internal hydraulic flow channel of valve block is optimized by using B-spline curve. Computational fluid dynamics analysis is carried out on the hydraulic flow channel to determine the optimal flow channel structure with the smallest pressure drop. The weight reduction of hydraulic valve block is carried out through topology optimization. According to the results of topology optimization， using the method of selective laser melting （SLM）， the printing of the hydraulic valve block is completed. The optimized hydraulic channel reduces the pressure loss by 31.4% compared with the traditional hydraulic channel. Compared with the traditional valve block， the hydraulic valve block manufactured by SLM with topology optimization reduces the weight by 33.9%. Therefore， the proposed flow channel optimization and valve block lightweight method provide a new reference for the performance improvement of the internal flow channel of hydraulic valve block and the overall lightweight design of valve block.
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Clc Number:
TH137
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