武汉科技大学本科毕业设计(外文文献） 题 目: 中高压外啮合齿轮泵设计 姓 名： 专 业： 交通运输 学 号: 202434011 指导老师: 外文文献一 The concept of gear pump is very simple， that it is two of the most basic form of the same size gear in a close co—operation of mutual engagement with the rotating shell， the shell’s internal similar ”8” shape， the two gears mounted inside ， the diameter of gear and work closely with both sides and shell。 From the extruder the material inhaled into the mouth of two intermediate gears， and full of the space， with the teeth along the shell of the rotary movement, the final two hours from the meshing teeth. Speaking in terms of gear， also known as positive displacement pump device ， that is, inside the cylinder like a piston, when a tooth to another tooth space of the fluid ， the liquid was squeezed mechanically to row out 。 Because the liquid is incompressible, so the liquid and the tooth at the same time will not be able to occupy the same space, so that the liquid has been ruled out. Because of the constant mesh gear， this phenomenon occurs on a row and， therefore, the pump provides a continuous export to exclude the amount of a turn each pump, the volume of discharge is the same。 With the continuous rotation of the driveshaft ， pump fluid is continuously discharged。 Pump flow directly to the speed of the pump。 In fact， there is little pump of the fluid loss, which makes the operation of pumps can not achieve 100％ efficiency， as these fluids are used to on both sides of bearing and gear lubrication ， and the pump body is also not possible with no gap， it can not be so that 100％ of fluid discharged from the export, so...
