Fuel pump armature manufacturer: Manufacturer of electric fuel pumps in automotive fuel systems

　　 Fuel pump armature The manufacturer states that the fuel pump, as a basic component in the engine fuel supply system, is responsible for drawing fuel from the fuel tank during engine operation and continuously supplying it to the engine under a certain pressure through the fuel supply pipeline. The high-pressure fuel pump then increases the pressure again, supplying a fixed amount of fuel to each cylinder according to the engine's firing order.

　　The fuel pump armature manufacturer indicates that the armature is an important part of the engine's fuel pump. Theoretically, the service life of a general fuel pump can reach thousands of hours. However, due to wear and tear, the service life of the fuel pump is greatly reduced to only a few hundred hours. The main wear is the corrosion of the armature by the fuel, causing very serious damage to the armature. The current market solution is to use spraying technology to process the insulation layer of the fuel pump armature. Generally, spraying powder is attached to the armature shaft and metal sheets to form an injection-molded insulation layer. The insulation layer is an epoxy resin layer formed by electrostatic spraying. However, this type of fuel pump has significant safety hazards. During the spraying process, the uneven thickness of the spraying powder may lead to the risk of the insulation layer being punctured by high voltage. On the other hand, the spray powder may also dissolve in methanol, ethanol, or other fuels such as diesel, leading to fuel pump failure. Therefore, the insulation layer of the existing fuel pump armature using spraying technology cannot guarantee the safety of the fuel pump, and the service life of the fuel pump is still too short.

　　The purpose of the new fuel pump armature is to solve the problem of the short service life of the current fuel pump and avoid the defects of the insulation layer formed by the spraying powder in the existing spraying technology, which may be punctured by high voltage or dissolved in methanol and other fuels. This utility model discloses a fuel pump armature, including an armature shaft, characterized in that: the injection-molded insulation layer is cylindrical and is located in the middle section of the armature shaft; multiple metal steel sheets are wrapped by the injection-molded insulation layer; a carbon commutator is connected to the injection-molded insulation layer at the tail end of the armature shaft; and a cylindrical shell.

　　In the middle section of the fuel pump armature shaft, the wound metal sheets are attached to the enamelled wires wound around the injection-molded insulation layer and the carbon commutator. The cylindrical shell is closed at the end opposite the carbon commutator. There are conical protrusions at both ends of the injection-molded insulation layer, which fit onto the armature shaft.

　　One end of the carbon commutator connected to the injection-molded insulation layer in the fuel pump is located inside the cylindrical shell, and the other end of the carbon commutator is exposed outside the cylindrical shell. In the fuel pump, the enamelled wires are filled between the conical protrusions at both ends of the injection-molded insulation layer and the cylindrical outer shell. The length of the metal sheets of the fuel pump armature is slightly shorter than the height of the injection-molded insulation layer. The fuel pump armature is injection-molded from polyoxymethylene. The injection-molded insulation layer can be made by injection molding, with a stable structure. The thickness of the insulation layer is strictly controlled according to the mold, resulting in high strength and preventing dissolution in methanol and other fuels. Compared with the existing fuel pumps, the injection-molded insulation layer of the new fuel pump armature will not be punctured by high voltage, greatly improving reliability and extending service life.

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