Theoretical Design and Experimental Study of Small Flow Vortex Pump
5=AngsanaUPC 1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, Zhejiang, China; 2. Zhejiang Cangnan Special Pump Co., Ltd., Wenzhou 325800, Zhejiang, China The pump has been tested. Theoretical analysis and experimental results show that a larger flow area can broaden the working range of the pump. Larger radial clearances and axial unilaterally spaced spoons will reduce the head and efficiency of pumping. The 刖S vortex pump has been widely used in aerospace power plants and petrochemical industries because of its high flow rate and small head. However, there are many difficulties in theoretical design and application, such as the relatively low efficiency of the characteristic curve. The scope of work is relatively narrow and the pump's inlet and outlet pipelines are installed. In this paper, a hydraulic design method based on efficiency is proposed in theory, and a large flow path area is proposed to broaden the scope of work. Finally, test analysis and engineering application studies are also conducted. Among them, ugly, 0 and the maximum lift angular velocity density and gravitational acceleration of the vortex pump. 2 Theoretical design 2.1 Performance parameters Performance parameters of the vortex pump are mainly efficiency 7 head ugly and maximum flow 91! . The efficiency of the vortex pump 7 can be 2,3 Received date; 2,0226; Revised date 20010 Prepared 01 fund project Zhejiang Province 19992,00 Key scientific and technological plan funded project 19901033 Which is the flow passage area over the vortex with self-rinsing structure The pump must account for this portion of the flow and volumetric efficiency that results from the pump outlet. 2.2 Geometric Parameters The area of ​​the runner obtained by the area ratio of the runners. The geometric dimension 1 fits well. In the case of the =0.25 stomach, the corresponding head and efficiency decrease but not obvious. In the design condition point, H 7 =18. From this it can be concluded that in 50.25 the ugly drop is not obvious, when, p 0.25 mm, is decreased More obvious. The effect of the runner area on the performance of the pump is 5 = 13, 1 = 81, and 2 = 2.5. The curve in the test result 3 of the guarana is 1. In the design condition point = 277 = 12. From this, it can be clearly seen that The head flow characteristic line becomes steeper and ugly, the head of the small flow area increases, and the head of the large flow area drops very sharply, resulting in a greatly reduced operating range of the pump, and the best efficiency point of the pump moves toward the small flow area. 3 test analysis parameters and major geometric parameters. 3.1 Test analysis of the fork boundary 83130 pump 3.1.1 The effect of radial clearance on the pump performance is 7 in the number of vanes, axial unilateral clearance = 0.15, radial clearance test results 2. Curve and l are in, p = 0.15mm and 1.0 test results. In the design condition of , = 0.15, the lift ugly = 132 melons, the efficiency 77 pump design flow design head calculation efficiency calculation head ug m 3.1.3 the effect of axial clearance on the pump performance 3 curve 2 is the heart = For 0.20, 1 and 1, it can be seen that the head drops more clearly, while the efficiency does not drop significantly. From this it can be concluded that the head ugliness decreased with the increase of the axial unilateral gap, and in 0.25, the ugly drop was not very obvious. When Ap 0.25mm, the drop was more obvious. 3.2 Test analysis of the fork 810 pump Since the impeller outer diameter is small, take the axial unilateral clearance 夂=15 to set the blood. The test results in the test result 4 under the condition of the number of blades 60, radial clearance = 0151 1. Curve 2 In the design of the second test, 5, 1 and 6 = 6, 1 test results. From the 4th, the first design can not meet the design requirements, and the improved design can meet the design requirements well. Under the design condition of 9=05 melon 3, the lift ugly =108 melon, the efficiency is 77=10.1. The reason is due to the fact that the height of the blade of the first design and the outer diameter of the impeller have not been obtained sufficiently. 3.3 Engineering Applications Based on the successful development of 083130 and again 810 two vortex pumps, the series development and development of the vortex pump has been successfully carried out, and has been applied in petrochemical and chemical companies for the transportation of fuel oxidant gasoline Liquid hydrocarbons diesel lye and other media. Users generally reflect that this series of vortex pumps are stable in performance, reliable in operation, and fully meet production requirements. 4 Conclusion 1 The hydraulic design method that can be used for small flow head vortex pumps is described. (2) The hydraulic test results of the two axial inlet vortex pumps show that the larger vortex pump can be used with a larger flow area. The effect of radial clearance and axial unilateral clearance on the performance of the pump is better than that of the pump. Better performance indicators must be guaranteed, 25, 1 and 215, otherwise the design of vortex shedding will not be able to meet the design requirements. slurry pump Slurry Pump,Vertical Froth Slurry Pump,Submersible Slurry Pumps,Lined Slurry Pumps Shijiazhuang Boda Industrial Pump Co., Ltd. , https://www.mineralslurrypump.com