螺桿泵的選用方法
A reasonable choice of method of screw pump
一、螺桿泵的轉速選用
1, screw speed selection
螺桿泵的流量與轉速成線性關系，相對于低轉速的螺桿泵，高轉速的螺桿泵雖然能增加了流量和揚程，但功率明顯增大，高轉速加速了轉子與定子間的磨耗，必定使螺桿泵過早失效，而且高轉速螺桿泵的定轉子長度很短，極易磨損，因而縮短了螺桿泵的使用壽命。
Screw pump flow and speed into a linear relationship, compared to the low speed of the screw pump, high-speed pumps can increase the traffic and although the head, but obviously increased power, high-speed accelerated between the rotor and stator wear, will enable screw premature failure, and high speed screw pump stator and rotor length is very short, easy to wear, thereby shortening the life of the screw pump.
通過減速機或無級調速機構來降低轉速，使勘轉速保持在每分三百轉以下較為合理的范圍內，與高速運轉的螺桿泵相比，使用壽命能延長幾倍。
Stepless speed reducer, or by institutions to reduce the speed, so that exploration and speed maintained at 300 per minute switch to a more reasonable under the context of the screw pump and high-speed operation than the lifetime can be extended several times.
二、螺桿泵的品質
Second, the quality of screw pump
現在市場上的螺桿泵的種類較多，相對而言，進口的螺桿泵設計合理，材質精良，但價格較高，服務方面有的不到位，配件價格高，訂貨周期長，可能影響生產的正常運行。
Now the types of pumps on the market more, relatively speaking, imports of screw-designed, excellent materials, but the price higher, services, and some are not in place, accessories high price, order-cycle length, may affect the production of the normal operation.
國內生產的大都仿制進口產品，產品質量良莠不齊，在選用國內生產的產品時，在考慮其性價比的時候，選用低轉速，長導程，傳動量部件材質優良，額定壽命長的產品。
Most of the domestic production of generic imported products, product quality varies greatly, in the selection of domestically produced products, taking into account their cost when the choice of low-speed, long lead, driving the amount of the fine material components, rated long life products.
三、確保雜物不進入泵體
Third, to ensure that debris does not enter the pump body
濕污泥中混入的固體雜物會對螺桿泵的橡膠材質定子造成損壞，所以確保雜物不進入泵的腔體是很重要的，很多污水廠在泵前加裝了粉碎機，也有的安裝格柵裝置或濾網，阻擋雜物進入螺桿泵，對于格柵應及時清撈以免造成堵塞。
Wet sludge mixed with the solid debris will screw pump stator rubber material damage, so make sure debris does not enter the pump cavity is very important, and in many wastewater treatment plant before the installation of a grinder in the pump, while others are installation of grid device or filter to block debris into the screw for the grill should be prompt settlement of fishing in order to avoid congestion.
四、避免斷料
Fourth, to avoid the broken material
螺桿泵決不允許在斷料的情形下運轉，一經發生，橡膠定子由于干磨擦，瞬間產生高溫而燒壞，所以，粉碎機完好，格柵暢通是螺桿泵正常運轉的必要條件之一，為此，有些螺桿泵還在泵身上安裝了斷料停機裝置，當發生斷料時，由于螺桿泵其有自吸功能的特性，腔體內會產生真空，真空裝置會使螺桿泵停止運轉。
Screw does not allow for the case of run-off materials, once occurred, rubber stator due to dry friction, the heat generated instantly burned, so grinder intact, grille flow is a necessary condition for the normal operation of pumps, one of To this end, some screw pump is also installed in the body break down plant material, as occurs when the material off, because he has a self-priming pumps feature the characteristics of the body will produce a vacuum chamber, vacuum devices will screw pump to stop operation.
五、保持恒定的出口壓力
maintaining a constant outlet pressure
螺桿泵是一種容積式回轉泵，當出口端受阻以后，壓力會逐漸升高，以至于超過預定的壓力值。此時電機負荷急劇增加。傳動機械相關零件的負載也會超出設計值，嚴重時會發生電機燒毀、傳動零件斷裂。為了避免螺桿泵損壞，一般會在螺桿泵出口處安裝旁通溢流閥，用以穩定出口壓力，保持泵的正常運轉。
Screw pump is a positive displacement rotary pumps, when the export side blocked after, the pressure will gradually increase, so that the pressure exceeds a predetermined value. At this time motor load increased dramatically. Transmission machinery-related parts of the load will exceed the design value, and in severe electrical burn occurs, transmission parts breakage. In order to avoid screw pump is damaged, usually installed in the screw pump bypass relief valve outlet to a stable outlet pressure, keep the pump running. |
