Abstract
The test system for emulsion pump is facing serious challenges due to its huge energy consumption and waste nowadays. To settle this energy issue, a novel energy regenerative system (ERS) for emulsion pump tests is briefly introduced at first. Modeling such an ERS of multienergy domains needs a unified and systematic approach. Bond graph modeling is well suited for this task. The bond graph model of this ERS is developed by first considering the separate components before assembling them together and so is the state-space equation. Both numerical simulation and experiments are carried out to validate the bond graph model of this ERS. Moreover the simulation and experiments results show that this ERS not only satisfies the test requirements, but also could save at least 25% of energy consumption as compared to the original test system, demonstrating that it is a promising method of energy regeneration for emulsion pump tests.
Highlights
The emulsion pump, one of hydraulic applications, has been widely applied in industry because it has the advantages of common hydraulic oil pump
The original test system used in the test standard is simple but energy-demanding, which uses an induction motor as the direct driver of test pump and employs a throttle valve to set the required load pressure of the test emulsion pump, wasting all the energy during the test
The variable displacement hydraulic motor (VDHM) which is actuated by the output oil of both variable displacement pump (VDP) and the rectifier valve drives the test emulsion pump, converting the hydraulic energy of oil first into mechanical rotational energy and back into hydraulic energy of emulsion fluid
Summary
The emulsion pump, one of hydraulic applications, has been widely applied in industry because it has the advantages of common hydraulic oil pump. Researches on ERS to date have generally been diverse, focusing on variable systems of hydraulic oil, such as hydraulic elevators [1, 2] and hydraulic excavators [3,4,5,6], as well as hydraulic forklifts and cranes [7, 8] These ERSs for hydraulic oil system, are not suitable to the emulsion pump tests because of the working fluid difference, not hydraulic oil but emulsion, resulting in no industry productions available in market, like emulsion motor. The main objectives of this paper are the modeling of this ERS for emulsion pump tests using bond graph approach and validation.
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