【正文】 都是對我們幫助非常大的，我們也只是學習到了一些皮毛，在以后的工作中我們也會更加注意這方面的學習。齒輪泵作為一種典型的液壓動力元件廣泛應用于機床工業(yè)、農用機械、工程機械、航空航天和船舶工業(yè)等眾多工業(yè)領域。它的結構簡單，主被兩齒輪就構成了其主要工作部件，較之葉片泵(葉片、轉子及其他附件)及各種型式的柱塞泵(斜盤、柱塞、缸體和回程盤等部件)在原始設計、制造工藝、以及加工手段等方面有無可比擬的優(yōu)越性。它僅由一對嚙合齒輪和泵體三個部件組成，因此具有尺寸小、重量輕、制造容易、工作可靠、價格低廉、對油液不敏感、自吸能力強、維護方便等優(yōu)點，在輸送液體的各種場合都獲得了應用，各類齒輪泵每年的產銷量達到數(shù)百萬臺套，產值數(shù)十億元人民幣。雖然葉片泵、柱塞泵等性能更好，但由于其對油液污染敏感、生產成本高等缺點，因此齒輪泵并未因此消失反而產量穩(wěn)步增加。在本次設計中我發(fā)現(xiàn)了齒輪泵的一些不足，隨著社會的發(fā)展，科學技術的不斷進步，我們原有的齒輪泵精度已經不能跟現(xiàn)在社會工廠加工相適應，我們應該研究出更加精確的齒輪泵，比如納米級和微米級的 。同時齒輪泵由于不可避免產生的氣蝕現(xiàn)象對于齒輪泵的效率來說是一個很大的難題，我們可以在這方面進行更加深入的研究，希望發(fā)現(xiàn)更多可以減小甚至消除這一現(xiàn)象以達到來提高齒輪泵工作效率的目的。安徽工程大學機電學院畢業(yè)設計（論文） 39 致 謝本研究及論文是在我的導師闞宏林老師的指導下完成的。他不僅在學習上對我們提出了很多對我們設計有關的指導，還經常對我們講述一些他自己的人生經驗以及在生活中應如何去面對生活中的挑戰(zhàn)。對于他的許多話語深深地感染和激勵著我，使我擁有了更多的知識，在研究的過程中從課題的選擇到項目的最終完成，闞老師給予我嚴格的督促、細心的指導和不懈的支持。四年來，母校的老師不僅在學業(yè)上給我以精心指導，同時還在思想、生活上給我以無微不至的關懷，在此謹向母校的老師致以誠摯的謝意和崇高的敬意。在此，我還要感謝在一起愉快的度過學習、生活的同學們，正是由于你們的幫助和支持，我才能克服一個一個的困難和疑惑，直至本文的順利完成。 時間倉促，水平有限，在設計過程中，難免有錯誤之處，請大家給予指正！ 時間：2022 年 6 月 3 日 簽名： 高成心高成心：齒輪泵設計及關鍵部件工藝設計 40 參考文獻[1]張耀宸，[J].北京：[2]孫恒，（第七版）[J].北京：[3]濮良貴，（第八版）[J].北京：[4][J].沈陽：[5][J].北京：[6]羅圣國，（第三版）[J].[7]朱輝，唐保寧，陳大復，（第六版）[J].北京：上海科[8][J].北京：[9]趙雪松，[J].武漢：[10]趙雪松，任小中，[J].武漢：[11][J].北京：[12]（新版）[J].北京：[13] Creve ling C M. Tolerance Design：A Handbook for Developing Optimal Specificati ons．AddisonWesley, 1997[14] Gao J S，Chase K W，Magleby S P. Generalized 3D tolerance analysis of Mecha nical assemblies with small kinematic adjustments. IIE Transactions． 1998．30：367 377[15]Zhang C，Wang H．Robust design of assembly and machining tolerance allocations IIE Transactions．1998．30：1 729安徽工程大學機電學院畢業(yè)設計（論文） 41 附錄部分附錄 AThe brief introduction about the gear pumpThe concept of gear pump is very simple, that it is two of the most basic form of the same size gear in a close cooperation of mutual engagement with the rotating shell, the shell39。s in ternal 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 in haled into the mouth of two inter mediate 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 squ eezed mechanically to row out. Because the liquid is inpressible, so the liquid and the too th 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 continu ously 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 c an not achieve 100% efficiency, as these fluids are used to on both sides of bearing and gear lubric ation, 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 a small amount of fluid loss is in evitable. However, a good pump can be run out of material for the majority, will still be able to achieve 93% ~ 98% eff iciency. For the viscosity or density change in the process fluid, the pump will not be affected too much. If there is a damper, for example, in the export side, one row or a limiter filter, pumps will push fluid through them. If the damper changes in their work, that is, if the filters bee dirty, blocked, or limiter on the back of the hypertension, the pump will maintain a constant f low, until the device in the weakest parts of the mechanical limit (usually equipped with a tor que limiter). For a pump speed, in fact, there are restrictions which mainly depend on the process fluid, if the transmission is oil, pump can rotate at high speed, but when the fluid is a high viscosit y of the polymer melt, such restrictions will be significantly reduced. Promote blood flow into the intake side of the two tooth space is very important, if not fill in this space is full, the pump will not be able to discharge the flow of accurate, so the value of PV (pressure velocity) is also a limiting factor, and is a process variable. As a result of these restrictions, gear pump manufacturers will provide a range of products, that is, different specifications and emission (per week to the emission of volume). These pumps will fit the 高成心：齒輪泵設計及關鍵部件工藝設計 42 specific application of technology to enable the sys tem to achieve optimal capacity and pri ce. PEPII pump shaft gear and a total of one species hardened using technology. Will be a lon ger working life. Dtype bearing a bination of forced lubrication mechanism, so that t he polymer surface by the bearing, and return to the import side of pump to ensure effective lubrication of the rotation axis. This feature reduces the degradation of polymers and the poss ibility of being stranded. Precision machining of the pump body can Dtype gear shaft wi th precision bearings to ensure noneccentric gear shaft to prevent gear wear. Structure and P arkool PTFE sealing lip sealed water cooled sealed together. This shaft seal does not actu ally contact the surface, it is the principle of the sealing polymer to a semimolten state cool ing and the formation of selfsealing. Can also be used Reseal sealing, seal it inside the table are reverse spiral groove processing； the polymer can be imported back to the ant pressure. In order to facilitate the installation, the manufacturer h