The problem of long standing idle of the gear pump

Gear pump, gear pump, arc gear pump not running idle for a long time, when starting again turn can produce gear pump jammed motionless or gear pump seal leakage, gear pump noise is big wait for a phenomenon, the main reason there are multiple aspects.
1: such as ordinary cast iron gear pump in place for a long time, due to general on the gear pump gear pump manufacturers do experiments are repeatedly used when testing of waste oil pool, unavoidably have some water in the oil, when this part of the used oil containing water long-term retention in the pump cavity and gear and the gear pump body contact with for a long time because a good contact with air oxidation etc, inner cavity of the gear pump will rust in a short time, cause the gear pump installed when using not turn. This kind of situation is more common in the newly installed client, general customers buy gear pump are bought in local salesroom, but often they buy these gear pump is the owner of stock or inventory (because the gear pump, gear pump middlemen are have inventory, only stock the length of time different) so warn broad customer buy gear pump in the local or the other must go to the first gear pump gear pump spindle rotation is flexible, whether uniform rotation, so as not to buy to return can produce needless trouble.

2: The gear pump and the arc gear pump are idle for a long time. When the gear pump is sealed during operation, the leakage will occur. Main reason is divided into two points: (1) pump mechanical seal as the medium to long-term backlog in the mechanical seal face not activity can produce carbon especially mechanical seal of pump in the transmission of high viscosity material, if not running gear pump long-term material will stick together and mechanical seal, when start the pump again light the mechanical end face of the gear wear and tear caused by pump leakage, heavy will then wring gear pump mechanical seal spring, gear pump mechanical seal direct damage.

The above: Design of gear pump