This gear pump solves the problem that the existing gear pump cannot be used in the plateau where the temperature difference varies greatly.
High Cold Resistance Gear Pump
This gear pump solves the problem that the existing gear pump cannot be used in the plateau where the temperature difference varies greatly. The pump body and the pump cover of the gear pump are fixedly connected and form a cavity therein, and one side of the pump body has an oil suction port, and the other side has a pressure oil port, and the driving gear in the cavity forms a closed state when meshing with the driven gear. The cavity, the driving gear and the driven gear are both helical gears, and one end of the pump cover connected to the pump body has a pair of mounting holes for positioning the driving gear and the driven gear, and a sealing ring is arranged between the driving gear and the pump cover, and the pump The end of the cover connected to the pump body is provided with a pair of unloading grooves, and the pair of unloading grooves are symmetrically arranged around the center connecting line of the driving gear and the driven gear, and a pair of unloading grooves can communicate with the closed cavity, one of which The unloading groove is respectively connected to the pair of mounting holes through a pair of oil passage grooves. The gear pump has the advantage that it does not suffer from oil trapping and can be used normally in alpine regions.
Figure 1 is a transverse cross-sectional view of the gear pump of the present invention.
Figure 2 is a schematic structural view of the pump cover of the gear pump.
Figure 3 is a longitudinal cross-sectional view of the gear pump.
In the figure, 1, pump body; 2, pump cover; 3, oil suction port; 4, pressure port; 5, drive gear; 6, driven gear; 7, closed cavity; 8, mounting hole; ; 10, through the oil tank; 11, sealing ring.
This gear pump is used in diesel locomotive diesel engines and can be used in environments with altitudes above 4,000 meters, ambient temperatures between -45 °C and 100 °C, and tunnel temperatures of 125 °C.