Dry goods! Fuel pump armature knowledge sharing

　　Fuel pump is a professional term in the automotive parts industry and is one of the basic components of the electronic fuel injection system of fuel-injected vehicles. The function of the fuel pump is to draw fuel from the fuel tank, pressurize it, and then deliver it to the fuel supply pipe, cooperating with the fuel pressure regulator to establish a certain fuel pressure. Today's topic is Fuel Pump Armature Related knowledge.

　　One end of the carbon commutator connected to the injection insulation layer of the fuel pump armature 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 wire is filled between the conical protrusions at both ends of the injection insulation layer and the cylindrical outer shell. The fuel pump armature has eight metal plates. The length of the metal plates is slightly shorter than the height of the injection insulation layer, and the fuel pump armature is injection-molded from polyoxymethylene.

　　1. The fuel pump armature includes an armature shaft, which is characterized by a cylindrical injection-molded insulation layer; in the middle section of the armature shaft, the injection-molded insulation layer wraps multiple metal steel sheets; a carbon commutator is fitted on the tail section of the armature shaft; the carbon commutator is connected to the injection-molded insulation layer; a cylindrical shell is fitted on the middle section of the armature shaft, wrapping the enamelled wire and the carbon commutator around the outer surface of the metal sheet injection-molded insulation layer; and the end of the cylindrical shell away from the carbon commutator is closed.

　　2. According to the requirements of the fuel pump armature, both ends of the injection-molded insulation layer are conical protrusions, and the conical protrusions are fitted on the armature shaft.

　　3. Due to the fuel pump armature described above, one end of the carbon commutator connected to the injection-molded insulation layer is located inside the cylindrical shell, and the other end of the carbon commutator is exposed outside the cylindrical shell.

　　4. Enamel wire is filled between the conical protrusions at both ends of the injection-molded insulation layer and the cylindrical outer shell.

　　5. The number of teeth of the root metal sheet is eight.

　　6. The length of the metal sheet is slightly shorter than the height of the injection-molded insulation layer.

　　7. The material of the injection-molded insulation layer is polyoxymethylene.

　　The new fuel pump armature includes an armature shaft and an injection-molded insulation layer. The injection-molded insulation layer is cylindrical and attached to the middle section of the armature shaft; multiple silicon steel sheets are wrapped by the injection-molded insulation layer; a carbon commutator is fitted on the tail of the armature shaft and connected to the injection insulation layer; a cylindrical shell is fitted on the middle section of the armature shaft and wraps the metal sheet, attaching the enamelled wire and the carbon commutator to the outer surface of the injection-molded insulation layer. The injection insulation layer can be made by injection molding. The injection insulation layer structure is stable and has high strength, and will not dissolve in methanol and other fuels. Compared with the existing fuel pump technology, the new injection insulation layer will not have the risk of high-voltage breakdown of the injection insulation layer, so the reliability is greatly improved, and the service life is extended.