Centrifugal pump drawings, CAD design for water pumps

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Structural types of centrifugal pumps; Code descriptions for structural feature types: Cantilever type, driven by a flexible coupling, horizontal installation with feet – qh1; Installation along the centerline – qh2. The pump is mounted on a base and connected to the drive unit via a flexible coupling. Vertical pipeline pump with a bearing housing – oh3; Bearing housing integrated with the pump. Vertical pipeline pump driven by a rigid coupling – oh4; Coaxial drive vertical pipeline pump – oh5. The impeller is directly mounted on the drive unit shaft and is integrated with a high-speed gearbox – oh6. The impeller is directly mounted on the drive unit shaft, with supports at both ends. Single-stage and double-stage axially split types – bb1; Radially split type – bb2. Multi-stage axially split type – bb3; Radially split single-shell type – bb4; Double-shell type – bb5. Cylindrical pump, vertical cantilever type, single-shell, with discharge through a water lift pipe – vs1. Volute type – vs2; Axial flow type – vs3. Type with separate discharge pipes, long shaft – vs4; Cantilever type – vs5. Double-shell type with a guide shell – vs6. Inner layer is a guide shell; Volute type – vs7. Inner layer is a volute. The hydraulic design of centrifugal pumps involves solving inverse problems related to the hydraulic calculations of the pump’s flow components. There are two basic types of hydraulic calculations: forward problems and inverse problems. The main problem is to determine the distribution of flow parameters in the channel, given all the geometric boundary conditions of the flow as well as certain flow boundary conditions. Therefore, the primal problem is also known as flow analysis, and it is described in Chapter 7. The inverse problem is to determine all the flow boundaries, given known flow parameters and conditions such as the prescribed flow distribution or the variation laws of geometric parameters that are sufficient to solve the problem. Its purpose is to design reasonable geometric boundaries. Currently, the flow design methods for turbomachinery are evolving from traditional single-stream design methods to two-stream or three-stream design methods. Of course, first and foremost, the development of positive problem solving has progressed rapidly. Currently, fully three-dimensional turbulence calculation methods can be used in engineering to perform flow analysis of all the flow-through components of centrifugal pumps. Meanwhile, three-dimensional inverse design methods are under development. In hydraulic design, in order to develop centrifugal pumps with excellent performance, the current approach involves iterative use of forward and inverse problems. Starting from a preliminarily designed centrifugal pump, 3D turbulent flow calculations are carried out; based on the results of these calculations, certain geometric parameters are adjusted, and flow calculations are performed again. Through interactive processes and repeated iterations, a centrifugal pump is ultimately developed that boasts high efficiency, meets the requirements related to cavitation, and satisfies all other specifications. Of course, this method of optimized design requires the designer to have some experience.