雙螺桿泵的用途和優(yōu)點(diǎn)
The purpose and advantages of twin-screw pump
由雙螺桿泵的原理知道，對于外置軸承的雙螺桿泵，通過軸承定位，兩根螺桿在襯套中互不接觸，齒側(cè)之間保持恒定的間隙（其間隙值由工況及泵本身規(guī)格決定），螺桿外圓與襯套內(nèi)圓面也保持恒定的間隙不變。兩根螺桿的傳動(dòng)由同步齒輪完成。齒輪箱中有獨(dú)立的潤滑，與泵工作腔隔開。這種結(jié)構(gòu)的優(yōu)點(diǎn)大大拓寬了雙螺桿泵的使用范圍，即：除了輸送潤滑性良好的介質(zhì)外，還可輸送大量的非潤滑性介質(zhì)，各種粘度（高粘度可達(dá)3*106mm/s）的介質(zhì)以及具有腐蝕性（酸、堿等性質(zhì)），磨蝕性的液體。
The principle known by the twin-screw pump for the external bearing twin-screw pump, through the bearing positioning, two screws in the bush is not in contact with each other, the tooth side of the gap between the constant (the gap value from working conditions and pump their own specification decisions), screw cylindrical with a round face, bush also maintained constant within the gap unchanged. 2 screw transmission gears from the synchronization to complete. Gear box has a separate lubrication, with the pump working chamber separated. The advantages of this structure greatly broadened the use of twin-screw pump, that is: In addition to conveying a good lubricating medium, it can also transport a large number of non-lubricating medium, various viscosity (peak viscosity of up to 3 * 106mm / s), as well as corrosive media (acids, alkalis and other properties), abrasive liquids.
雙螺桿泵由于其恒定間隙的存在以及型線上的特點(diǎn)，其屬于非密封型容積泵，因此除了輸送純液體外，還可輸送氣體和液體的混合物，即汽液混輸，這也是雙螺桿泵非常獨(dú)特的優(yōu)點(diǎn)之一。
Twin-screw clearance because of its constant presence, as well as in-line characteristics, it belongs to the non-vented type displacement pump, so apart from conveying a pure liquid, it can also transport a mixture of gases and liquids, namely, vapor-liquid mixed transportation, which is double - screw very unique strengths.
雙螺桿泵由于結(jié)構(gòu)的獨(dú)特設(shè)計(jì)，可以自吸而無須專門的自吸裝置，而且由于軸向輸送軸流速度較小而具備很強(qiáng)的吸上能力即很小的NPSHr值。
Twin-screw pump due to the unique design of the structure can be self-priming without specific self-priming device, and because the axial axial transmission speed of smaller and has strong suction capacity, or the small NPSHr value.
雙螺桿泵還可干轉(zhuǎn)。由于運(yùn)動(dòng)部件在工作時(shí)互不接觸，因此短時(shí)的干轉(zhuǎn)不會(huì)破壞泵元件，這種特點(diǎn)給自動(dòng)控制的流程提供了極大的方便，但干運(yùn)轉(zhuǎn)時(shí)間受多種因素限制，一般很短。
Twin-screw pump can also be dry transfer. As the moving parts do not touch each other at work, so would not undermine short-term dry transfer pump components, such characteristics to the automation of the process provides a great convenience, but the dry running time limited by many factors, generally a very short .
另外雙螺桿泵在輸送過程中無剪切，無乳化作用，因此不會(huì)破壞分子鏈結(jié)構(gòu)和工況流程中所形成的特定的流體性質(zhì)，并且由于傳動(dòng)依靠同步齒輪，泵運(yùn)轉(zhuǎn)噪音低，振動(dòng)小，工作平穩(wěn)。
Another twin-screw pump in the course of transmission without shear, non-emulsifying effect, it will not destroy the structure and working conditions of molecular chains formed by processes specific fluid properties, and because relying on synchronous transmission gear, pump operation, low noise, vibration a small, smooth. |
