| 摘要 |
PURPOSE:To provide a wear-resistant burner tip made of ceramics which is superior in a wear-resistance and is not destroyed when it is pressed and fixed by a method wherein an injection port is made at a central part of a main body and an annular engaging part is projected, an upper contact surface and a lower contact surface are formed perpendicular to a central axis and an area of the upper contact surface is made same or slightly large than an area of the lower contact area. CONSTITUTION:A cap nut 7 is threadably fitted to a set 6 to fix a projected annular engaging part 3 is fixed to an outer circumference of a main body 1, liquid fuel injected from a through-pass hole 14 is injected from an injecting port 2 to perform combustion. Since the entire assembly is made of ceramics having a heat-resistant and a wear-resistant characteristic, a projection 17 around the injecting port 2 or the like is not worn. Further, since the annular engaging part 3 is made such that its upper contact surface 9 and its lower contact surface 10 are formed in perpendicular to a central axis and an area of the upper contact surface 9 is made the same as that of the lower contact surface 10 or slightly larger than that, a pressing force caused by the nut 7 generates only a compression stress at the annular engaging part 3, and so it is not damaged by its fastening force.
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