Working principle and typical structure of KCB gear oil pump

Working principle of gear oil pump

1. Driving gear;

2 a driven gear;

3 pump body;

4 meshing line

The root cause of drainage work.

(2) the suction and drainage cavity of the hydraulic pump must be separated.

This is the fundamental guarantee that the hydraulic pump can work normally, as shown in the gear meshing line in Figure L-L.

And some hydraulic pumps must be set up the distribution device, such as valve, valve plate or distribution shaft.

(3) The absolute pressure of the liquid in the tank must be equal to or greater than the atmospheric pressure.

This is the external condition of the positive displacement hydraulic pump to suck the liquid.

Therefore, the tank must always be in contact with the atmosphere, or a closed pressurized tank must be used.

The typical structure of gear pump

Gear pumps come in many forms.

This section briefly lists some typical constructions that are widely used.

Figure L-2 shows the KCB gear oil pump.

The driving gear 4 and driven gear 3 are mounted in the pump housing and supported by four needle roller bearings 2.

Its pump form is composed of three parts: pump body 5, front cover 6 and back cover L.

On the back cover, corresponding to the position of the suction chamber and the drain chamber of the pump, a suction port and a drain port are opened.

The pump has the following characteristics in the structure:

Its axial clearance is determined by the thickness tolerance between the gear and the pump body, and it can deliver liquid stably.