Development and research status of hydraulic transformer in hydraulic system(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年06期
- Page:
- 118-126
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Development and research status of hydraulic transformer in hydraulic system
- Author(s):
- JIANG Ji-hai; YANG Guan-zhong
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China
- Keywords:
- mechanical engineering; hydraulic transformer; energy-saving; CPR; engineering machinery; transformation
- PACS:
- TH137.5
- DOI:
- -
- Abstract:
- In the hydraulic system, the hydraulic transformer is a newly developing component, which can be used to convert fluid pressure and recover energy in the system. Currently, hydraulic techniques make a new breakthrough in developing a common pressure rail (CPR) system that can recover the extra energy in the environment where energy saving and emission reduction is needed in the world. The hydraulic transformer is the core of CPR system and its performance is a key to promote the CPR system that embodies environment protection. It has become a research focus. In this paper, research development of hydraulic transformer was reviewed at home and abroad. The transformer was classified as linear one and rotary one. Invention and development of the classic rotary hydraulic transformer were described and its attributes were analyzed by referring patents. And why it is not appropriate for the CPR system was pointed. Invention of the new rotary hydraulic transformer was introduced and its advantages compared to classic rotary one were evaluated based on the patents. It was pointed why the new one is appropriate for the CPR system. Its three generations and new progress were introduced in detail. The two pressure adjusting ways including throttling and transforming were contrasted to the present general transformation principle of hydraulic transformer. The different working principles of hydraulic transformers based on the classification of hydraulic transformer were derived. The characteristics of new hydraulic transformer were elaborated. The case shows that the new transformer can bring a remarkable energy-saving effect in engineering machinery. So, it is very appropriate for the CPR system. Besides, current key problems and their causes of the new transformer are concluded. At last, it is pointed that the solution of the flow control issue makes the new hydraulic transformer evolve from pressure transducer into power transducer, and there are many spots to research and improve in future.
Last Update: 2016-12-02