單螺桿泵的選型要點
Selection of points of single-screw pump
1.單螺桿泵的壓力確定：
1. Single-screw pump pressure to determine:
單螺桿泵大輸出壓力是根據襯套級數即襯套的導程數來確定：
Single-screw pump maximum output pressure is under the bush bush the lead of the series that the numbers to determine:
1級：高工作壓力為0.6 MPa；
Level 1: maximum working pressure of 0.6 MPa;
2級：高工作壓力為1.2 MPa；
2: maximum working pressure of 1.2 MPa;
4級：高工作壓力為2.4 MPa；
Level 4: maximum working pressure of 2.4 MPa;
由于輸送介質情況不同，對于含有嚴重磨損性的介質，請參照表一選擇襯套級數。
As the transmission medium is different, for containing severe wear resistance of the medium, please refer to Table 1 Selected bush series.
2.單螺桿泵轉速的選擇：
2. Single-screw pump speed options:
單螺桿泵由于其結構特點，大部分使用在輸送較高粘度的液體及含有顆粒的液體，因此其轉數的選擇非常關鍵，根據經驗，列出表二、表三，您可根據具體情況綜合考慮。
Single-screw pump because of its structural features, mostly used in the transportation of liquids and higher viscosity of the liquid containing the particles, so the choice of rotation is critical, according to experience, listed in Table 2, Table 3, you can depending on of comprehensive consideration.
3.單螺桿泵襯套橡膠材料的選擇：
3. Single-screw bush rubber material selection:
單螺桿泵襯套為橡膠制品，也是單螺桿泵的一個易損件，它的選擇好壞，直接影響襯套的壽命，一般正常情況下襯套的壽命為3-6個月，如果選用不當，襯套可能從鋼管中脫落或橡膠掉塊。所以要求我們對橡膠的基本特性及橡膠對各種不同介質的適應性有所了解，根據我們的經驗列出表四、表五。
Rubber bushing for single-screw pump is a single-screw pump wearing parts, it is the choice of good or bad directly affects the lining of the life, under normal conditions of life bush 3-6 months, if the chosen properly, the lining may be detached from the steel or rubber blocks away. So, asked us to the basic characteristics of rubber and rubber on the adaptability of a variety of different media have to understand, according to our experience are listed in Table 4, Table 5.
4.材料組合選擇：
4. Materials Portfolio Selection:
輸送不同性質的介質，需不同材料組合。
Transport different types of media, be combinations of different materials.
5.性能表：
5. Performance Table:
一般單螺桿泵的性能表或特性曲線都是以20C清水為介質（粘度為1cst）時的數據，對于輸送不同粘度下的流量與軸功率不同。
General single-screw pump performance curves are based on tables or 20C of water as a medium (viscosity 1cst) when the data for the transmission of different viscosities of different flow and shaft power.
6.軸封：
6. Seal:
根據需要和輸送介質，可采用機械密封和填料密封兩種，且這兩種結構具有互換性。
According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.
7.泵的驅動方式：
7. Pump driven by:
由于單螺桿泵為低速泵，泵的驅動方式較多，一般有低速電機直聯（6級、8級）、齒輪減速電機驅動、無級變速電機驅動等方式。
As the single-screw pump for the low-speed pump, pump-driven approach more, generally have low-speed motor Direct (6, 8 grade), Gear motor drive, variable speed motor drive, etc..
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