Experimental Research on Parameters of a Late-Model Hydraulic-Electromotor Hybrid Pumping Unit

Figure 3

Sketch diagram of the experiment station. 1. Overflow valve; 2. Accumulator; 3. Variable-displacement pump; 4. Gear coupling group (1); 5. Variable-displacement motor; 6. Variable frequency motor; 7. Torque and speed sensor (1); 8. Gear coupling group (2); 9. Torque and speed sensor (2); 10. Gear coupling group (3); 11. Magnetic powder brake; 12. Magnetic powder clutch; 13.DC motor.