A Well Water Submersible Pump with Flow Adaptive Impeller

Abstract

The invention discloses a well water submersible pump with a flow self-adaption impeller. The well water submersible pump comprises the impeller and a pump shaft, the impeller comprises an impeller shell, blade blocks, a flow guide cover, an adjustment wheel and slide rods, and the flow guide cover is arranged at one end of the impeller shell; the blade blocks are radially installed on the side face of the impeller shell through a fastener and can rotate along the axis of the installation part, the adjustment wheel is arranged in the impeller shell, one end of each slide rod is arranged in a hole, connected with the outside, of the side face of the impeller shell, and the other end of each slide rod is meshed with the adjustment wheel through teeth; the slide rods slide in the side wall ofthe impeller shell and drives the adjustment wheel to rotate, and the adjustment wheel drives the blade blocks to rotate around an installation shaft. The rotation axis of the adjustment wheel is coaxial with the pump shaft, and the slide rods are arranged in the radial direction of the impeller shell and located in front of the blade blocks in the water flowing direction. Each slide rod moves horizontally through water pressure change of one end of the slide rod to drive the placement angle of a corresponding blade to be changed, so that linkage between the water pressure change and the placement angles of the blades is achieved.

Description

technical field [0001] The invention relates to the field of submersible pumps, in particular to a well water submersible pump with a flow self-adaptive impeller. Background technique [0002] The well water submersible pump is a kind of pump for pumping well water. When the flow rate is large, the axial flow pump is generally used. [0003] The blade placement angle of the axial flow pump is a very important work parameter, which significantly affects the work efficiency. Under a certain flow head, the impeller can run efficiently only if the placement angle is within a certain range. The specific theoretical relationship is in "Modern Pumps Detailed introduction in Theory and Design. [0004] For larger axial flow pumps, a slight increase in efficiency can bring significant energy-saving benefits, so large axial flow pumps are generally made with adjustable blade placement angles, but in the prior art, the adjustment of blade placement angles It is very troublesome. For ...

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Problems solved by technology

[0004] For larger axial flow pumps, a slight increase in efficiency can bring significant energy-saving benefits, so large axial flow pumps are generally made with adjustable blade placement angles, but in the prior art, the adjustment of blade placement angles It is very troublesome. For example, in the patent application number CN201610082905.7, the adjustment of the blade placement angle requires dismantling the impeller end cover to adjust the placement angle through the operating rod. Not only the adjustment is troublesome, but also the adjustment lags behind. Corresponding manual adjustment cannot achieve real-time adjustment. That is to say, when the short-term flow changes due to the workload, it is basically not considered to adjust the blade placement angle. When the flow fluctuates, the blade placement angle does not change accordingly, and the work Efficiency also fluctuates and cannot operate efficiently for a long time

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