Screw pump common faults and treatment methods list

This paper describes in detail the screw pump (including twin screw pump, three screw pump) the phenomenon of failure, screw pump failure causes, and treatment methods. No. Symptoms Cause Remedy 1 pump does not absorb oil 1, the suction pipe is blocked or air leaks 2, the suction height exceeds the allowable suction height of the vacuum 3, the motor reverses 4, medium viscosity is too large 1, overhauls the suction pipe 2, reduce the suction height 3, change the motor steering 4, the media warming 2 pressure gauge pointer fluctuations 1, the suction pipe leakage 2, the safety valve is not adjusted or the working pressure is too large, so that when the safety valve closed 1, check the suction pipe 2, adjust the safety valve or reduce the working pressure 3 flow down 1, the suction pipe blockage or leakage 2, screw and pump sleeve wear 3, the safety valve spring is too loose or valve and seat contact lax 4, the motor speed is not enough , Overhaul suction line 2, wear and tear should be replaced when the parts seriously 3, adjust the spring, grinding flap and valve seat 4, repair or replace the motor 4-axis power increased dramatically 1, the exhaust pipe is blocked 2, 3, the medium viscosity is too high 1, stop the pump to clean the pipeline 2, repair or replacement of parts 3, the medium temperature 5 pump vibration big 1, the pump and the motor is not the heart 2, screw and pump sleeve big heart or gap 3, the pump There gas 4, the installation height is too large , The pump produces cavitation 1, adjust the concentricity 2, overhaul adjustment 3, overhaul the suction pipe to exclude air leaks 4, reduce the installation height or reduce the speed 6 pump heat 1, severe friction within the pump 2, mechanical seal back to the oil hole Blockage 3, the oil temperature is too high 1, check the adjustment screw and pump casing 2, clear the oil return hole 3, appropriate to reduce the oil temperature 7 large oil seal mechanical seal 1, the assembly position is not 2, the sealing gland is not flat 3, Or static seal surface bump 4, moving ring or static ring seal damage 1, re-install as required 2, adjust the seal gland 3, grinding sealing surface or replace the new piece 4, replace the seal