Single screw pump failure in total and breakdown maintenance methods

03 - 19

single screw pump used in the long run late may meet all kinds of fault, single screw pump are summarized in this paper, the single screw pump producers use often met the problem of late, and tells the breakdown maintenance plan! 1, pump body, vibration or noise fault fault causes: installed the water pump, water pump is too high, more than on the pump suction capacity; Motor bearing damage; Water pump shaft bending or different heart and motor spindle, not parallel, etc; Suction line or water pump suction side leakage; Suction pipe clogging. Screw pump maintenance methods: stabilizing pump or reduce the installation height of water pump suction pipe reduce the resistance and clean or increase the filter, and reduce the viscosity of medium; Replace the motor ball bearings; Correct bending pump spindle or adjust the pump and motor position; Remove the suction pipe and pump suction side leakage; Eliminate suction pipe blockage. 2, the shaft or overheating fault of motor bearing fault reasons: lack of lubricating oil or bearing fracture, etc. Screw pump maintenance methods: filling lubricating oil or replace bearing. 3, heat pump fault fault reason: pump moving parts are in serious friction; Mechanical seal oil return hole plugging; The oil temperature is too high; Installation is not straight, moving parts are different. Screw pump maintenance methods: check the replacement of wear parts; Dredge oil return hole; Appropriate to reduce the oil temperature. Adjust the correct assembly and installation accuracy. 4, no flow output fault fault reason: suction pipe blockage or leakage; Suction height more than promised suction vacuum height; Electric thoughts inversion; Medium viscosity through large, etc. Screw pump maintenance methods: inspection suction pipe, to reduce the suction height, to change motor, the dielectric heating, etc. 5, insufficiency of pump pressure fault fault reason: whether seal leakage; In the condition of equipment to stop, when there is no screw pump and self-closing function, drainage systems; The selection is correct; Stress at the exit, and so on. Screw pump maintenance methods: insufficient pressure of pump. With a lot of problems. Simple is check whether import jams. Looking at the motor. If the two no problem. That is about to open the screw and the bearing is broken 6, flow down fault, fault reason, suction pipe blockage or leakage; Screw sleeve, sleeve wear; The relief valve spring is too loose or disc and seat contact is lax; Motor speed is not enough; Installation is too high, more than pump suction ability on shaft seal leakage. Screw pump maintenance methods: repair suction piping; Badly worn parts should be changed; Adjust the spring, grinding disc and seat. Repair or replace the motor; Reduce height and suction on the suction pipe resistance; Repair or replace the shaft seal.

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