齿轮油泵的工作原理如下： 1. 齿轮泵是用于输送油的泵，泵体有一对啮合齿轮，一个是主动齿轮，另一个是被动齿轮。 2. 由于两个齿轮的啮合，泵的工作腔被分为两个独立的部分，一侧是吸入腔，另一侧是排出腔。  3. 当齿轮油泵工作时，驱动齿轮使从动齿轮旋转，并且当齿轮啮合并脱离啮合时，在吸入侧形成局部真空，并且液体被吸入。 4. 吸入的液体充满齿轮并被带到排放侧，当齿轮进入啮合时，液体被压缩形成高压液体，并通过泵的排放口从泵中排出。 
The working principle of gear oil pump is as follows:
1. A gear pump is a pump used for transporting oil, and the pump body has a pair of meshing gears, one is the driving gear and the other is the passive gear.
Due to the meshing of two gears, the working chamber of the pump is divided into two independent parts, one side is the suction chamber and the other side is the discharge chamber.
When the gear oil pump is working, the driving gear rotates the driven gear, and when the gear meshes and disengages, a local vacuum is formed on the suction side, and the liquid is sucked in.
4. The inhaled liquid fills the gear and is carried to the discharge side. When the gear engages, the liquid is compressed to form high-pressure liquid, which is discharged from the pump through the discharge port.