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D750-23 type Gas Blower Fault Treatment


D750.23-type, gas handling capacity of 45,[link widoczny dla zalogowanych],000 m / h, the total pressure head of 24kPa. In use since I982 has good performance and is operating normally. January 2004 for the repair, by exposing hood fan, the rotor, and gas seal, oil seals and bearing clearance are normal tightening force,[link widoczny dla zalogowanych], but the April start, we found that the total pressure head down to 16kPa, the motor start-up time up to 40s. View the fan in the repair records show that the fan rotor, air sealing, bearings were normal, the motor abnormalities are not found, the working voltage and current are in line with requirements. Sudden drop in air pressure that fan because there is leaking gas pipes and valves. As the valve and pipe leaks, motor start-up with the load, is bound to extend the start time. Therefore, we believe that pressure reduces fan and motor start-up time extension of the root cause of leakage. Gas inlet tube inspection, no abnormal appearance of the phenomenon, when checking into the blower air valve, air valve,[link widoczny dla zalogowanych], and flew out of the interior of the valve, we found that flew valve (installed in the duct between the duct and into the loop bypass pipe) to the left of valve failure, flew off the valve can not be serious. In addition, there also found the safety valve leakage phenomenon. Since the two valves leak,[link widoczny dla zalogowanych], causing some gas into the intake duct from the duct, and the circulation by the fan impeller, the motor starts under load, the motor is bound to extend the start time,[link widoczny dla zalogowanych], while reducing pressure blower . To deal with these issues, the blower and motor are back to normal, the total pressure head by 16kPa blower up to 24kPa, the motor start-up time is also reduced from the 40s to the 25s.