after the flow of the oil from the outlet of the impeller flow passage, the oil is guided by the guide groove, thus the directional flow of the oil is made, which makes the center line of the impeller coincide with the central line of the guide wheel, that is, the impeller is suspended, thus reducing the friction between the impeller and the guide wheel, and thus improving the performance of the oil Submersible pump and prolonging the Ye Daolun's performance. The service life.