A Diffusion Guide Ring Matching the Radial Asymmetric Guide Vane Body of the Pump

Abstract

The invention relates to a diffuse type diversion ring matched with radial asymmetric guide blade bodies of a pump, and belongs to the field of fluid machinery. The diffuse type diversion ring is characterized in that outlet sections of front and back cover plates of radial guide blade bodies are lengthened to form guide rings. In order to improve the hydraulic efficiency, the diffuse type diversion ring also can adopt the following technical scheme: the radial guide blade bodies consist of blades and the front and back cover plates; the blades are positioned between the front and back cover plates; two blades aligned to the outlet end of an annular pumping chamber and arranged anticlockwise are respectively a first blade and a second blade; an included angle between the first blade and the center line is beta 1; an included angle between the second blade and the center line is beta 2; beta 1 is equal to beta 2; the beta 1 is in a value range of 15-300, preferably 240; and the rest ten blades are symmetrically arranged in the peripheral direction. The diffuse type diversion ring improves the hydraulic matching performance of the asymmetric guide blade bodies and the pumping chamber so as to improve the efficiency and the operation stability of the pump.

Description

technical field [0001] The invention relates to a diffusion guide ring matched with a radial asymmetric guide vane body of a pump, which belongs to the field of fluid machinery. Background technique [0002] The guide ring is widely used in fans and steam turbines, mainly to rectify the incoming flow and change the direction of the incoming flow. The diversion effect of the guide ring on the fan changes the concentrated erosion and wear of the airflow on the blades, and eliminates the dust accumulation vibration of the blades. However, the use of guide rings in the field of water pumps is seldom. In the present invention, a guide ring is added at the outlet of the guide vane body. [0003] The guide vane body is a device widely used in water pumps. In some water pumps, due to structural and design reasons, it is often necessary to design the pressure water chamber into an annular structure. Due to the low matching characteristics of the annular pressure water chamber and th...

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Problems solved by technology

[0003] The guide vane body is a device widely used in water pumps. In some water pumps, due to structural and design reasons, it is often necessary to design the pressure water chamber into an annular structure. Due to the low matching characteristics of the annular pressure water chamber and the impeller, the fluid Large hydraulic loss occurs in the annular pressurized water chamber, resulting in low pump efficiency; the guide vane body can collect and transport the liquid flowing out of the impeller to the downstream, and convert part of the kinetic energy of the liquid flow into pressure energy, eliminating the flow of liquid Rotation can significantly improve the pump efficiency; the traditional guide vane fluid directly enters the annular pressure water chamber from the outlet of the guide vane body, and the fluid flow in the annular pressure water chamber is very turbulent, resulting in a large loss in the annular pressure water chamber. The research data also shows that , the hydraulic loss in the annular pressurized water chamber occupies a large proportion in the whole pump

[0004] At present, the guide ring is rarely used in water pumps, and the research on the guide vane body mainly focuses on the optimization of the blade profile, geometric parameters, number of blades and other factors, and has not yet rectified the fluid at the guide vane body outlet and from the guide vane body. Research on the arrangement of leaves and blades

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