Hydraulic Pump Fault Diagnosis Method Based on EWT Decomposition Denoising and Deep Learning on Cloud Platform

Figure 7

Hydraulic system diagram of hydraulic pump failure simulation test bench. 1, oil tank; 2, 21, and 17, filter; 3, vane pump; 4 and 15, stop valve; 5 and 13, pressure gauge switch; 6 and 14, pressure; 7 and 10, flow meter; 8, axial piston; 9, vibration sensor; 11, frequency converter; 12, check valve; 16, two-position three-way solenoid valve; 18, pilot-operated proportional overflow valve; 19, pilot-operated overflow value; 20, overflow value; 22, temperature meter; 23, impulse sound level meter.