lwz150双头螺杆型干式无油真空泵的设计-学位论文.docVIP

PAGE  题目：LWZ-150双头螺杆型干式无油真空泵的设计 2013年05月  PAGE \* MERGEFORMAT II  PAGE \* MERGEFORMAT I LWG-150双头螺杆型干式无油真空泵的设计 摘 要 干式双螺杆真空泵是一种容积式无油真空泵，具有结构紧凑，抽速大，真空度高，可直排大气，使用寿命长，自吸能力强，无易损件，运转可靠，维修维护方便，动平衡性好，振动小，无压力脉动与噪音，可高速平稳的一作，适应性强，还可用于多相混输，无喘振现象，易于实现连续排气等诸多优点，因此厂泛的应用于冶金、电子、化学、食品、医药、环保等工业生产部门。国外已发展出诸多此类真空泵产品，而在我国的发展却相对落后。虽然我国对无油真空泵的需求日益增长，但是许多跨国公司的真空泵产品却在我国的高端真空泵市场中占据了主导位置。因此，自行研究经济可行、运转可靠的无油真空泵意义可见一斑。为了适应我国开发研究生产螺杆真空泵的需要，本文对双螺杆真空泵的设计型线组成问题等内容进行了的研究与探讨。 关键词：双头干式真空泵；螺杆；型线 Abstract  PAGE \* MERGEFORMAT 1  PAGE \* MERGEFORMAT II LWZ-150 Double-Headed Screw Type Dry Vacuum Pump Abstract The oil-free twin-screw vacuum pump is a new kind of rotational positive displacement pump.The structure of the pump is simple and liquids or solids are hard to accumulate when sucked with gas or are condensed or solidified in the pump. It is outstanding for its excellent efficiency, high vacuum, exhausting to the air directly, a long life, good sucking, reliable work, convenient maintenance, favorable dynamical balance, light vibration, no pressure fluctuate and noise, work placidly with high speed, strong adaptability, mufti-phase duties, no quiver, easy to continuous exhausting, etc. It is used widely in industrial territory of metallurgy, electron, chemistry, pharmacy, food and environment, and so on. At present, all over the world have been trying their best to develop oil-free vacuum pumps, but our country has been fallen behind other countries. Although the demand of the oil-free vacuum pumps has been experiencing a rapid growth, the products of many multinational companies take up the major market share of dry compression vacuum pumps and high vacuum pumps. Therefore it is very significant to develop economical, feasible and reliable dry-running vacuum pumps by us. For the sake of requirements of developing and researching in our country, the paper investigates the meshing theory of twin-screw pump, buildup of the rotors curve, and leaks. Keywords：dry(oil-fre