Journal
ENERGIES
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/en11092266
Keywords
aircraft; electro-hydrostatic actuator (EHA); heat reduction; load-sensing pump
Categories
Funding
- National Basic Research Program of China (973 Program) [2014CB046400]
- National Natural Science Foundation of China [U1737110, 51605425]
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The electro-hydrostatic actuator (EHA) with variable pump displacement is considered to be a promising alternative to the currently popular EHA with fixed pump displacement in terms of heat reduction. This paper presents a load-sensing pump for the EHA which requires no additional power source and can adjust its volumetric displacement automatically with load pressure. A load-sensing pump prototype was developed and experiments were carried out on a test rig for it under different operating conditions. In addition, an experimental campaign was performed on an EHA test bench with a load-sensing pump and a fixed displacement pump. The results show that the load-sensing pump can decrease its volumetric displacement automatically at high pressure and thus reduce the heat generation of EHA system effectively.
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