So many motor problems were found in the spot check of the water pump

On August 15, 2023, the website of the Chongqing Market Supervision and Administration Bureau issued a notice on the supervision and random inspection of two types of products including agricultural machinery products in 2023. The unqualified items of the submersible pump products in this spot check mainly involve the specified point flow and head (the flow rate under the specified head or the head under the specified flow rate), waterproof cables (exit cables), grounding devices, and signs (product signs).

The working principle of the electric pump is to use the motor to drive the impeller to rotate at a high speed, thereby forming a certain pressure to suck the liquid into the pump body, and then discharge it through the impeller and the inlet and outlet pipes. Specifically, when the electric pump is working, the motor converts electrical energy into mechanical energy, which drives the impeller to rotate rapidly. The impeller sucks liquid into the pump body while rotating, and then discharges the liquid through the outlet pipe inside the pump body. Throughout the process, the seal plays an important role in preventing liquid leakage and foreign impurities from entering.

(Statement: The pictures in this article have nothing to do with this fact)

The sampling of this random inspection mainly comes from the circulation market, so the results of the random inspection are relatively objective; the unqualified situation of the random inspection is shown in the table below. This random inspection indirectly reflects the hidden dangers of the quality of the supporting motors, which should attract the attention of the majority of motor producers and water consumers.