How to deal with the problem of trapped oil press

In the closed state of the oil press, the phenomenon of changing the volume of the oil and the sudden change of pressure is called trapped oil, which will generally lead to turbidity or pressure impact, and will affect the use of the hydraulic pump of the oil press, shorten the use time, and the causes of trapped oil are different, so there are slight differences in treatment.

In order to ensure that the oil press gear pump can smoothly absorb and press oil in succession, in the meshing process, before the gear is removed from the mesh, the rear gear should enter the mesh, so that the two teams of gears mesh together to form a closed volume, the gear pump front and rear cover plates or on the floating sleeve to open the unloading slot, the closed volume constraint to the most useful to eliminate the oil trapped phenomenon of the oil press. The volume is connected by a large and small oil pressure chamber. The smaller closing volume makes the oil of the hydraulic press kneaded, resulting in an increase in pressure and temperature, forming a local vacuum to separate the gas from the oil, and the trapped oil phenomenon occurs. As long as a rectangular unloading slot is opened on the cover plate of the two ends of the hydraulic press, when the closing volume is reduced, the high pressure chamber is connected to the unloading slot, so that the oil is discharged into the hydraulic chamber, when the closing volume of the hydraulic press increases, The oil suction chamber is connected with the unloading tank to make up for the oil to prevent the onset of vacuum, which also prevents the trapped oil.

Hydraulic double-acting vane pump, the Angle between the two blades is less than the Angle between the distance of the oil distribution window, the Angle between the distance is less than the Angle between the stator arc part, in the oil suction and pressure flow distribution window to form a closed volume, will not show trapped oil, in order to prevent the oil pressure window to show trapped oil, open a triangular groove in the front end of the pressure window, reduce the pressure sudden change to reduce the output pressure pulsation and noise.