a brush
A technology of electric brushes and carbon brushes, which is applied in the manufacture of circuits, collectors, and brushes, etc., can solve the problems of short life, poor stability, and low operating efficiency of brushes, and achieve long service life, high stability, and motor commutation good performance
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Embodiment 1
[0080] 1) Prepare materials (parts) according to the following weight ratio:
[0081]
[0082] Wherein, the natural graphite is selected from T399.9; the synthetic graphite particle size is ≤325 mesh, the carbon content is ≥99.9%, the fixed carbon content is ≥80%, the moisture content is ≤0.5%, and the ash content is ≤0.5%; the phenolic resin 2124 liquid resin is selected, its solid content is 50±2%, and the free phenol content is ≤20%; the metal powder is a mixture of copper powder and silver powder, and the weight ratio of copper powder and silver powder is 4:1; The copper powder is dendritic electrolytic copper powder, the purity is ≥99.9%, and the loose specific gravity is 0.8-1.0g / cm 3 , the particle size is -325 mesh; the silver powder is flaky silver powder with a purity of 99.9%, and the powder particle size is ≤ 80nm; The ratio of molybdenum disulfide and tungsten disulfide is 3:1; the particle size of molybdenum disulfide and tungsten disulfide is 3000-4000 mesh,...
Embodiment 2
[0117] 1) Prepare materials (parts) according to the following weight ratio:
[0118]
[0119] Wherein, the natural graphite is selected from T399.9; the synthetic graphite particle size is ≤325 mesh, the carbon content is ≥99.9%, the fixed carbon content is ≥80%, the moisture content is ≤0.5%, and the ash content is ≤0.5%; the phenolic resin 2124 liquid resin is selected, its solid content is 50±2%, and the free phenol content is ≤20%; the metal powder is a mixture of copper powder and silver powder, wherein the weight ratio of copper powder and silver powder is 5:1; The copper powder is dendritic electrolytic copper powder, the purity is ≥99.9%, and the loose specific gravity is 0.8-1.0g / cm 3 , the particle size is -325 mesh; the silver powder is flaky silver powder with a purity of 99.9%, and the powder particle size is ≤ 80nm; The ratio of molybdenum disulfide and tungsten disulfide is 3:1; the particle size of molybdenum disulfide and tungsten disulfide is 3000-4000 m...
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