High-speed pump, also known as high-speed part of the pump

High-speed pump, also known as high-speed part of the pump, pump, impeller, inducer, diffuser, gearbox, mechanical seal, lubricating oil system, etc., as shown in Figure 2-10. You may also be interested in Magnetic Pump, High Temperature Magnetic Pump, Stainless Steel Magnetic Pump, Pipeline Pump, Vertical Pipeline Pump, Horizontal Pipeline Pump, Pneumatic Diaphragm Pump, Electric Diaphragm Pump, etc. Welcome! 1. Driven gear 2. Gear box 3. High speed shaft 4. Mechanical seal 5. Diffusion tube 6. Induction wheel 7. Spring body 8. Base 9. Impeller lO. . Oil filter; 12. Lubricating oil pump; l3. Low-speed shaft; 14. Drive gear high-speed pump is the United States by the Sindy (SUNDYNE) company in 1962 invented. Is now widely used in petroleum refining, petrochemicals, energy, chemicals, paper, food, mining and other industries. Shengda high-speed pumps for low-flow high-lift occasions: flow 34 ~ 250m3 / h, head high-speed pump performance and structural features are as follows: ① high-speed pump performance curve High-speed pump diffuser pipe diameter greatly affect the performance. When the velocity of the liquid passing through the throat is equal to or slightly greater than the circumferential speed of the impeller, the continuity of the flow is destroyed, resulting in a sudden drop in head to zero. This is the high-speed pump head interrupt feature, when the head interrupt interrupt flow rate is called interrupt value. High-speed pump flow curve shown in Figure 2-11. When the circumferential speed of the impeller is constant, the larger the throat diameter of the diffuser tube is, the larger the interrupting flow rate value is and the more gentle the transition of the curve is. This feature of high-speed pump, when the over-flow of the motor has a protective effect. In addition, the highest efficiency point is often in the vicinity of the interruption of traffic, so even though the design conditions at the highest efficiency point, but the actual use must be slightly lower than the design flow conditions, in order to avoid instability of the head. ② special impeller type high-speed pumps are mostly open radial straight blade impeller (without front and rear cover). Impeller generally linear radiation, but also with open back curved blades and closed impeller, mainly to improve the curvature of the HQ curve and improve the efficiency of large flow. Open impeller greatly reduces the axial thrust generated by the impeller, sometimes to further reduce the axial thrust in the rear plate near the hub also opened a balance hole, so that thrust bearing operating conditions greatly improved, even in the high Continuous operation at speed, the bearings can also be long-term normal operation. ③ wear-resistant seal ring is not required Although ethylene is transported in a small, volatile medium, the high-speed pump is not afraid of internal leakage because the output liquid from the high-speed pump accounts for only a small portion of the pressure chamber. The impeller and pump There is no need to wear a wear ring between the body, on the contrary can maintain a large gap, the high-speed pump can transport viscosity less than 5000mPa · S of petroleum products, chemical etching solution, suspension and a small amount of liquid particles. ④ shaft seal high-speed pump with a specially designed mechanical seal, the axial size is particularly compact, in order to reduce the length of the shaft cantilever; shaft sleeve is very easy to balance the fixed ring, and other with spring, ring and floating ring is not easy Balance part as a static part of the seal, in order to meet the needs of high speed. At the same time due to high speed, the seal of the cooling is essential. SUNDY-NE company's standard configuration is to export liquid from the pump outlet, the pump after the liquid separator on the single-end mechanical seal cooling. Users can also choose this standard configuration or series, double-ended mechanical seal and a wide range of flushing, cooling and leak handling options depending on the particularity of the media. ⑤ suction performance High-speed pump cavitation performance is poor, so the entrance of high-speed pumps are equipped with induction wheel, induction wheel and pump impeller cast as a whole. ⑥ high-precision gearbox high-speed pump gearbox has a two-speed growth rate and growth rate of two, each has a lot of different grades of output speed, high-speed pump with only a few models can cover a wide range of head And the flow range, the versatility of components is very good. After gear precision machining, the noise does not exceed the same level of motor.