Efficient heat dissipation integrated disc type brushless electronic water pump and working method thereof

Abstract

The invention discloses an efficient heat dissipation integrated disc type brushless electronic water pump and a working method thereof. The working method comprises the steps that when a water pump works, liquid in a pressurized water chamber can form heat dissipation inner circulation due to differential pressure, the circulation path is that the liquid flows through a first runner groove, a second runner groove and a third runner groove from an outer runner groove to enter a rotor cavity and then flows back to the pressurized water chamber through an inner runner groove, and then heat of astator and a circuit board is taken away in the internal circulation process; due to the fact that the runner grooves are formed in the pump body and the front end cover, when the water pump works andthe liquid in the pressurized water chamber flows through a shell, the end face of a junction box and the rotor cavity, heat from the stator can be taken away, heat of the circuit board can also be taken away, and the heat dissipation capacity and the working reliability of the water pump are improved; and the integrated impeller shaft reduces parts, is convenient to assemble, does not need to beprovided with a through hole, is suitable for the condition of small shaft diameter, and improves the strength of the impeller.

Description

technical field [0001] The invention relates to an electronic water pump, in particular to an internal circulation brushless electronic water pump. Background technique [0002] The electronic water pump is a machine driven by a motor to transport fluid or pressurize the fluid. In order to ensure that the liquid does not leak to the winding or circuit board of the motor when the pump is running, electronic water pumps often use dynamic seals such as mechanical seals to prevent liquid leakage. The assembly precision of dynamic seal is relatively high, and it is easy to wear and tear. Or as in the patent CN203130530U, an integrated water-proof sleeve is set to isolate the stator and rotor of the motor, and the end cover and the through-hole shaft of the perforation are set to make the liquid form an internal circulation. However, on the one hand, the liquid flows in the rotor cavity, which only takes away the heat of the stator from the inside, and the heat dissipation capaci...

AI Technical Summary

Problems solved by technology

However, on the one hand, the liquid flows in the rotor cavity, which only takes away the stator heat from the inside, and the heat dissipation capacity is limited; on the other hand, the contact area with the junction box is small, and the ability to take away the heat from the circuit board is even more limited.

At the same time, a through hole is set on the shaft, which weakens the strength of the shaft. In order to connect with the impeller, a thread is set on the shaft, which further weakens the strength of the shaft through the hole, and cannot meet the application in the case of a small shaft diameter.

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