Gear pump common fault and maintenance methods: (1) Symptom: the pump can not discharge Fault causes: a, the opposite direction of rotation; b, suction or discharge valve is closed; c, the inlet without material or pressure is too low; d, viscosity too High, the pump can not bite countermeasures: a, confirm the direction of rotation; b, confirm the valve is closed; c, check the valve and pressure gauge; d, check the liquid viscosity, low speed operation by the speed ratio of the flow rate is there, , Then the inflow is insufficient. (2) Symptoms: abnormal sound failure reasons: a, coupling eccentric or poor lubrication b, motor failure; c, reducer abnormalities; d, shaft seal at the installation of bad; e, shaft deformation or wear countermeasures: a, Check or fill the grease; b, check the motor; c, check the bearings and gears; d, check the shaft seal; e, parking disintegration inspection (3) Symptom: pump flow failure Cause: a, suction or discharge valve is closed; b, the inlet pressure is low; c, the outlet pipe plugging; d, packing box leak; e, speed is too low countermeasures: a, confirm the valve is closed; b, check the valve is open; c, confirm the discharge volume is normal; Solid; a large number of leaks affect the production, should stop running, disassembly inspection; e, check the actual shaft speed; (4) symptoms: current over the cause of the fault: a, the outlet pressure is too high; ; c, shaft seal assembly bad; d, shaft or bearing wear; e, motor failure measures: a, check the downstream equipment and pipelines; b, viscosity test; c, check the shaft seal, appropriate adjustments; d, Handcart car is too heavy; e, check the motor (5) Symptom: pump suddenly stopped Fault causes: a, power outage; b, motor overload protection; c, coupling damage; d, The mouth pressure is too high, interlocking reaction; e, abnormal bite into the pump; f, shaft and bearing adhesion stuck measures: a, check the power; b, check the motor; c, open the safety cover, disk inspection; d, check Instrument interlocking system; e, after parking, reversing confirmation; c, disc confirmation
The main type of Tape Measure is Steel Tape, followed by fiber tape, which is the tape that everyone often sees. Many people say it is a cloth ruler, and there is also a waist measurement ruler (tailor ruler/clothing ruler belong to this category). In southern China and Hong Kong, the tape measure is usually referred to as a soft ruler or a pull ruler. The material is PVC plastic and glass fiber, which can prevent the tape from being stretched during use.
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