公开(公告)号：US4866240A

公开(公告)日：1989-09-12

申请号：US241923

申请日：1988-09-08

Applicant: Roderick P. Webber

Inventor： Roderick P. Webber

IPC: B23K10/00 ,  H05H1/34 ,  H05H1/42

CPC classification number: H05H1/42 ,  H05H1/34 ,  H05H2001/3421 ,  H05H2001/3478 ,  H05H2001/3484

Abstract: Apparatus and method are disclosed for introducing powder into a stream of plasma generated in a plasma torch such as a plasma transferred arc torch.The nozzle of the torch has a central base through which the stream of plasma flows, the bore being conically flared immediately adjacent the exit end of the nozzle. Powder is fed through feed bores in the nozzle to the conically flared portion of the central bore and is directed in the form of streams of powder toward the plasma streams at angles to the longitudinal axis of the central bore of between about 45.degree. and about 50.degree., preferably 50.degree., with a velocity component in the direction of travel of the plasma stream. The streams of powder are fed sufficiently close to the plasma stream as to avoid spreading of the streams of powder before they reach the plasma stream, but not so close to the plasma stream as would cause plugging of the feed bores in the nozzle.

Abstract translation: 公开了用于将粉末引入等离子体焰炬中产生的等离子体转移弧焊炬中的等离子体流的装置和方法。 喷枪的喷嘴具有中心基座，等离子体流通过该中心基座，孔直接与喷嘴出口端相连。 粉末通过喷嘴中的进料孔进料到中心孔的锥形扩张部分，并且以约45°至约50°的中心孔的纵向轴线的角度朝向等离子体流的粉末流的形式 DEG，优选50°，其中等离子体流的行进方向上的速度分量。 粉末流被充分地进料到等离子体流，以避免粉末流在它们到达等离子体流之前扩散，但不等于等离子体流，因为会使喷嘴中的进料孔堵塞。

公开(公告)号：US4911363A

公开(公告)日：1990-03-27

申请号：US298379

申请日：1989-01-18

Applicant: Roderick P. Webber

Inventor： Roderick P. Webber

IPC: B05B7/20

CPC classification number: B05B7/205

Abstract: An improved combustion head for use with flame spray apparatus constructed according to the principles described in U.S. Pat. No. 4,416,421 is provided with a recess in the floor of the counterbore receiving hot pressurized combustion gases from the combustion chamber. The recess is of depth sufficient to redistribute the heat of the combustion gases to prevent local hot spots in the counterbore and to avoid cracking and erosion in the combustion head by reducing thermal fatigue which occurs in cyclic use of the flame spray apparatus. The improved combustion head is also provided with radially spaced longitudinal channels extending inwardly from the periphery thereof, along which channels cooling water is passed to cool the improved combustion head.

Abstract translation: 一种用于火焰喷射装置的改进的燃烧头，其根据美国专利No. No.4,416,421在沉积物的地板中设置有从燃烧室接收热的加压燃烧气体的凹槽。 该凹陷的深度足以重新分配燃烧气体的热量，以防止沉孔中的局部热点，并且通过减少在循环使用火焰喷射装置中发生的热疲劳来避免燃烧头中的开裂和侵蚀。 改进的燃烧头还设置有从其周边向内延伸的径向间隔开的纵向通道，沿着该纵向通道使冷却水通过，以冷却改进的燃烧头。