Core-pulling-type guide vane pump

Abstract

Disclosed is a core-pulling-type guide vane pump. The core-pulling-type guide vane pump comprises a pump outer cylinder, a guide vane body, an impeller, a shaft and a flow guiding bracket. The guide vane body is internally provided with guide blades. All the guide blades in the guide vane body of the pump are designed at the positions beyond the maximum outer diameter of the impeller. The guide vane body is directly connected with the outer cylinder. The maximum outer diameter of the flow guiding bracket is less than the inner diameter of the outer cylinder and larger than the maximum diameterof the impeller. The minimum inner diameter of the part, on the upper portion of the impeller, of the guide vane body is larger than the maximum diameter of the impeller. According to the core-pulling-type guide vane pump, a rotor can be pulled out very conveniently and maintained, and the guide vane body does not need to be pulled out during core pulling, thus the diameters of outer cylinders ofan existing core-pulling-type centrifugal pump and a low-specific-speed diagonal flow pump can be decreased, and the product cost and the pump house cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of water pumps, and relates to a core-pulling guide vane pump, in particular to a guide vane pump oblique flow pump and a guide vane centrifugal pump which do not need to pull out guide vane bodies during core pulling. Background technique [0002] Guide vane pumps include guide vane centrifugal pumps and diagonal flow pumps, as well as guide vane axial flow pumps. At present, this type of pump generally adopts a non-core-pulling structure ( figure 1 ) or core-pulling structure ( figure 2 ). When maintaining the non-core pump, the whole pump must be hoisted out and disassembled for maintenance, which is very troublesome to maintain. In the pumpable core pump, the pumpable parts of the pump include the guide vane body in the stator in addition to the entire rotor, and the guide vane body is a part with a larger mass in the guide vane pump, which increases the weight of the pumpable parts , and for centri...

AI Technical Summary

Problems solved by technology

In pumpable core pumps, in addition to the entire rotor, the pumpable parts of the pump also include the guide vane body in the stator, and the guide vane body is a part with a larger mass in the guide vane pump, which increases the weight of the pumpable parts , and for centrifugal pumps and oblique flow pumps with low specific speed, the outer edge of the pump guide vane is gourd-shaped, and its maximum outer edge diameter is much larger than the diameter of the impeller, so the diameter of the pumpable cylinder is large. Increases the manufacturing cost and floor space of the pump, thus increasing the cost of the pump house

Therefore, this kind of pump is rarely designed as a core-pulling structure.

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