Electromagnetic clutch water pump with dual friction disks

Abstract

The invention discloses an electromagnetic clutch water pump with dual friction disks. The electromagnetic clutch water pump comprises a main shaft penetrating a pump body. The main shaft stretches out of the two ends of the pump body, an impeller is fixed to one end of the main shaft, and the other end of the main shaft is sequentially sleeved with a belt wheel suction disk and a metal friction disk. An electromagnetic coil assembly is arranged in the belt wheel suction disk, and the metal friction disk and the belt wheel suction disk are oppositely arranged in a clearance manner. The electromagnetic clutch water pump is characterized in that a plane spring and a metal magnetic conductive disk are sequentially fixed on the face, back on to the belt wheel suction disk, of the metal friction disk through screws in a penetrating manner, and the plane spring and the belt wheel suction disk are fixed; a permanent magnet and a non-metal friction disk are sequentially fixed on the face, backon to the plane spring, of the metal magnetic conductive disk; an induction drive disk opposite to the non-metal friction disk is further fixed to the main shaft, and a metal magnetizer cooperating with the permanent magnet to generate eddy currents is buried in the induction drive disk; and when the electromagnetic coil assembly is powered, the attraction force F of the electromagnetic coil assembly and the metal friction disk is larger than the attraction force f of the permanent magnet and the metal magnetizer. The torque transmission force of an inner power transmission structure of the water pump is higher, and work stability and reliability are higher.

Description

technical field [0001] The invention relates to an electromagnetic clutch water pump with double friction discs. Background technique [0002] The electromagnetic clutch water pump is an important part of the automobile engine, and its function is to provide the engine with a certain amount of coolant at a constant pressure. In the actual working process, this type of electromagnetic clutch water pump can determine whether its impeller runs at full speed or at half speed according to the detected temperature of the engine water, which has the effect of saving energy. [0003] The components of the above-mentioned electromagnetic clutch water pump in the prior art usually include a main shaft, a pump body, an impeller, a pulley suction cup, an electromagnetic coil assembly, a metal friction disc, a magnetically conductive drive ring, a permanent magnet and a permanent magnet fixing ring; the impeller is fixed on one end of the main shaft, The main shaft is set through the pu...

AI Technical Summary

Problems solved by technology

[0006] 2) In the known electromagnetic clutch water pump mechanism, when the electromagnetic coil assembly is energized, the metal friction disc absorbs the pulley suction cup to transmit torque. Since the electromagnetic coil assembly is different from the permanent magnet, its adsorption force depends on current control, and there is instability.

Coupled with the unreliability of the known metal friction disc torque transmission mentioned above, the overall reliability and stability of the existing electromagnetic clutch water pump work are all low

[0007] 3) Because the known electromagnetic clutch water pump works at full speed when it is powered on, once an electrical failure occurs inside the car, the water pump will only run at half speed, so that after the engine water temperature rises rapidly, the driver will often not find it. It is easy to burn and there is a safety problem

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