Design of Digital Hydraulic Transformer and Experimental Research on Its Steady State Characteristics

被引：0
|
作者：
Liu T. [1 ,2 ]
Sun R. [1 ,2 ]
Han Y. [1 ,2 ]
Zhao D. [1 ,2 ]
机构：
[1] Hebei Key Laboratory of Fluid Power Transmission and Control of Heavy Machinery, Qinhuangdao
[2] Key Laboratory of Advanced Forging Technology and Science Ministry of Education, Qinhuangdao
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 08期
关键词：
Constant pressure network; High-speed on-off valve; Hydraulic transformer; Operating characteristics;
D O I：
10.3901/JME.2022.08.266
中图分类号：
学科分类号：
摘要：
A digital hydraulic transformer(DHT) is proposed, which combines multiple binary displacement ratio pump / motor flow units together and uses a mechanical connection to make them rotate synchronously. A high-speed on-off valve group is connected to the inlet and outlet of each flow unit, and the on-off state of each valve group corresponds to a binary number. By controlling the digital status of the inlet and outlet valve groups, different transformation ratios can be adjusted to achieve different pressure output. According to the working principle of DHT, the structural design and mathematical modeling were performed, and a prototype was manufactured. Finally, a test platform is built to verify its steady state characteristics. The results show that the proposed digital hydraulic transformer can change its voltage with the change of digital control quantity, which verifies the feasibility and practicability of its voltage transformation principle. DHT has the characteristics of discrete digital components, simple and easy to control, and has a large voltage range. It can be used as a secondary regulating element in a hydraulic constant pressure network system to drive a linear load. It can also recover potential energy and pressure energy at the load end, which is of great significance for improving the efficiency of the hydraulic system. © 2022 Journal of Mechanical Engineering.
引用
收藏
页码：266 / 273
页数：7
相关论文
共 18 条
  • [1] LU Hongying, JIANG Jihai, ZHANG Weiguan, Et al., Hydraulic transformer controlled hydraulic cylinder system based on hydraulic constant pressure network system, Journal of Jilin University, 39, 4, pp. 885-890, (2009)
  • [2] LI Wanguo, FU Yongling, CHEN Juan, Et al., Variants of secondary control with power recovery for loading hydraulic driving device, Chinese Journal of Mechanical Engineering, 28, 3, pp. 618-633, (2015)
  • [3] TYLER HENRY P., Fluid intensifier, (1965)
  • [4] HERBERT H K, CAMARILLO C., Hydraulic transformer, (1971)
  • [5] ACHTEN P A J, ZHAO Fu, VAEL G E M., Transforrming future hydraulics: A new design of a hydraulic transformer, The Fifth Scandinavian International Conference on Fluid Power, SICFP'97, (1997)
  • [6] ACHTEN P, van den BRINK T., A hydraulic transformer with a swash block control around three axis of rotation, 8th International Fluid Power Conference (8.1FK), 3, pp. 411-422, (2012)
  • [7] ACHTEN P A J., Ein neuer alter bekannter-der hydraotransformator, Hydraulic and Pneumatic Technology, 6, pp. 374-377, (1998)
  • [8] ACHTEN P A J, van den BRINK T, van den OEVER J., Dedicated design of the hydraulic transformer, 3rd International Fluid Power Conference, pp. 233-24, (2002)
  • [9] VAEL G, ACHTEN P, POTMA J., Cylinder control with the floating cup hydraulic transformer, The Eighth Scandinavian International Conference on Fluid Power, pp. 1-15, (2003)
  • [10] BISHOP E., Digital hydraulic transformer-efficiency of natural design, 7th International Fluid Power Conference, 1, pp. 861-866, (2010)
12