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Research Papers: Operations, Applications and Components

Optimal Design and Experimental Research of the Anti-Cavitation Structure in the Water Hydraulic Relief Valve

[+] Author and Article Information
He Xu

College of Mechanical and
Electrical Engineering,
Harbin Engineering University,
Harbin 150001, China
e-mail: railway_dragon@sohu.com

Haihang Wang

College of Mechanical and
Electrical Engineering,
Harbin Engineering University,
Harbin 150001, China
e-mail: wanghaihang@hrbeu.edu.cn

Mingyu Hu, Liye Jiao, Chang Li

College of Mechanical and
Electrical Engineering,
Harbin Engineering University,
Harbin 150001, China

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received September 4, 2017; final manuscript received July 3, 2018; published online August 22, 2018. Assoc. Editor: Steve J. Hensel.

J. Pressure Vessel Technol 140(5), 051601 (Aug 22, 2018) (8 pages) Paper No: PVT-17-1172; doi: 10.1115/1.4040893 History: Received September 04, 2017; Revised July 03, 2018

Water hydraulics relief valves are essential components of hydraulic systems. These valves maintain the desired pressure and thereby prevent other components from being damaged. During operation of the relief valve, the water flow often cavitates in the valve port owing to the rapid decline in pressure, affecting the stability and safety of the hydraulic system. To improve relief valve performance, an optimal design of the valve was determined. Using a computational fluid dynamics approach, the effects of the valve core design and the nonsmooth groove structure of the valve seat on the jet flow structure were modeled and tested. The anti-cavitation structure was optimized parametrically, and the ideal valve port structure was determined. Tests were conducted to compare cavitation in the water hydraulics relief valve with and without the anti-cavitation structures. Results of these tests showed evident enhancement of cavitation performance.

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Figures

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Fig. 1

Three-dimensional model and valve port structure of the water hydraulic relief valve

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Fig. 2

Valve port structure and its flow field: (a) whole and (b) half

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Fig. 3

Detailed sectional drawing of the jet orifice and groove surface

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Fig. 4

Meshing result of valve port of model C

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Fig. 5

Pressure distribution of different structures (unit: Pa): (a) Model A: normal structure, (b) Model B: grooved surface of valve seat, (c) Model C: anti-cavitation structure, and (d) Model D: anti-cavitation structure after the groove surface is eroded

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Fig. 6

Velocity vectors of different structures (unit: m/s)

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Fig. 7

Optimizing structure parameters of model C

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Fig. 8

Design of experiments effect factor analysis: (a) Deviation bar chart for response Q and (b) Deviation bar chart for response P

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Fig. 9

isight optimization model

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Fig. 10

Optimal cyclic process of the isight software

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Fig. 11

Water hydraulic experimental system

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Fig. 12

Cavitation visual observation experiment

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Fig. 13

Two different sets of valve core and seat

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Fig. 14

Comparison of cavitation images for the normal and anti-cavitation structures in a period of time: (a) normal structure and (b) anti-cavitation structure

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Fig. 15

Comparison of cavitation images for the normal and anti-cavitation structures in different inlet pressures: (a) normal structure and (b) anti-cavitation structure

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