Experiments of the ECD
The mechanical energy of both the wind wheel and the 3-DOF mechanism can be converted into hydraulic energy by the ECD invented by us. The ECD is shown in Fig. 4a. There are 8 pinions assembled around the main gear. In the two sides of each pinion are assembled two sets of crank-rockers. The motion of the shaft is transmitted from the main gear to the pinions which drive the crankrockers to generate reciprocating motions of the rods. Whatever the rotation direction, the hydraulic cylinders conduct oil suction and discharge alternately to export high pressure oil, converting mechanical energy into hydraulic energy. The ECDs can be superposed to realize high-power conversion. The ECD is utilized for the conversion of both wind power and wave energy. Consequently, the efficiency of the ECD is significant for the W2P. The experimental scheme by using the power recovery method is designed to test the efficiency of the ECD. And the test platform is built, which is shown in Fig. 4b. Through the reduction gear box the output of the hydraulic motor is transmitted to the ECD, which produce high pressure oil cycling to the experimental hydraulic motor. The power loss of the circulation is supplemented by the high pressure oil from the main pump outside. The power loss of the reduction gear box can be calculated using the data of the torque and speed sensors. The flywheel increases the rotation inertia to weaken the fluctuation of speed. In the stable configuration, the power loss of the ECD can be calculated by the
difference between the circulation power loss which equals to the power supplement of the main pump and the sum of the power loss of the reduction gear box and the hydraulic motor. The method has the
advantage in avoiding the energy consumption of the simulated load. The efficiency of the ECD under various pressures and speeds shown in Fig. 4c demonstrates that the efficiency η is over 80%.
Experiments of the ECD
The mechanical energy of both the wind wheel and the 3-DOF mechanism can be converted into hydraulic energy by the ECD invented by us. The ECD is shown in Fig. 4a. There are 8 pinions assembled around the main gear. In the two sides of each pinion are assembled two sets of crank-rockers. The motion of the shaft is transmitted from the main gear to the pinions which drive the crankrockers to generate reciprocating motions of the rods. Whatever the rotation direction, the hydraulic cylinders conduct oil suction and discharge alternately to by PriceMinus"> export high pressure oil, converting mechanical energy into hydraulic energy. The ECDs can be superposed to realize high-power conversion. The ECD is utilized for the conversion of both wind power and wave energy. Consequently, the efficiency of the ECD is significant for the W2P. The experimental scheme by using the power recovery method is designed to test the efficiency of the ECD. And the test platform is built, which is shown in Fig. 4b. Through the reduction gear box the output of the hydraulic motor is transmitted to the ECD, which produce high pressure oil cycling to the experimental hydraulic motor. The power loss of the circulation is supplemented by the high pressure oil from the main pump outside. The power loss of the reduction gear box can be calculated using the data of the torque and speed sensors. The flywheel increases the rotation inertia to weaken the fluctuation of speed. In the stable configuration, the power loss of the ECD can be calculated by the
difference between the circulation power loss which equals to the power supplement of the main pump and the sum of the power loss of the reduction gear box and the hydraulic motor. The method has the
advantage in avoiding the energy consumption of the simulated load. The efficiency of the ECD under various pressures and speeds shown in Fig. 4c demonstrates that the efficiency η is over 80%.
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