Patent ID: 9168545
Filing Date: 2015-10-27
Classification: B01D,B05B,F23D,F23J

Abstract:
1. An internal mix air atomizing spray nozzle assembly comprising: a nozzle body having a central liquid flow passage for coupling to a pressurized liquid supply, said liquid flow passage having a discharge orifice from which pressurized liquid is directed along a central axis of the nozzle assembly; an air cap mounted at a downstream end of said nozzle body having an upstanding impingement post against which a pressurized liquid flow stream from said liquid discharge orifice impinges and is transversely directed; an air guide for coupling to a pressurized air supply for directing pressurized air into said air cap and about said impingement post for interaction with and atomizing liquid transversely directed by the impingement post; said air cap having an expansion chamber about said impingement post and a plurality of discharge orifice defining passages communicating with the expansion chamber disposed in circumferentially spaced relation about the impingement post; said air cap passages extending at a compound angle to the central axis for directing atomized liquid streams at a first angle outwardly of the central axis and at a second angle transverse to the central axis for discharging the atomized liquid from the air cap in an expanding conical spray pattern swirling in a predetermined rotative direction about the central axis; and said impingement post having a diffuser at an end thereof that defines a flat central impingement surface in aligned relation to said liquid discharge orifice and an outer annular array of non radial diffuser veins about the periphery of the impingement surface extending outwardly of the impingement surface for directing the atomized liquid and pressurized air in a swirling fashion about the impingement post in the same rotative direction as the spray pattern discharging from the air cap passages.