Patent Application
20210229117
The present disclosure relates to a spray nozzle, and more particularly to a swirling spray nozzle.
A variety of devices are known in the nozzle art for controlling various characteristics of spray emanating from spray nozzles. Certain features have been used in fluid circuits to provide a desired spray angle without imparting spray slot streaks, however the conventional methods and systems may become unsatisfactory for their intended purpose as the fluid circuit moves radially outward, farther away from the centerline of the nozzle. Thus, there is still a need in the art for a spray nozzle having improved streak and angle control. There also remains a need in the art for such nozzles and components that are economically viable. The present disclosure may provide a solution for at least one of these remaining challenges.
A spray nozzle including a housing having a primary passage defining a primary axis, a series of secondary passages configured to provide swirl to a fluid passing there through, circumferentially positioned around the housing, a series of standoffs circumferentially spread around an outer surface of the housing and located downstream along the primary axis of the series of swirling passages, wherein each of the swirling passages corresponds to a respective standoff of the series of standoffs, in order to control the swirl of the fluid. The outer surface of the housing can include multiple outer diameters as a function of position along the primary axis. Each of the standoffs can be circular and include a rounded face facing the corresponding secondary passage.
Each of the secondary passages can define a secondary axis not parallel to the primary axis and be directed at a corresponding standoff. The series of secondary passages can be positioned radially outward from the outer surface of the housing.
Each of the standoffs can be positioned downstream of the series of secondary passages along the primary axis of the primary passage. A distance between each of the standoffs can greater than a diameter of each of the standoffs.
An outer sleeve covering the nozzle is configured to be part of an assembly. A top surface of each of the standoff can be flush against an inner surface of the outer sleeve to maintain concentricity of the nozzle components. A flow path can provided between the outer surface of the nozzle and the inner surface of the sleeve, for receiving fluid exiting the secondary passages.
Feeding a fluid stream through the primary passage of the nozzle along a primary axis, producing a swirling fluid stream through the series of secondary passages along, at a non-parallel angle to the primary axis, can reduce the swirl of the fluid by impinging the fluid against the series of standoffs downstream of the secondary passages. The resultant spray includes at least a 80 degree angle and no greater than 110 degrees.
These and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings.
So that those skilled in the art to which the subject invention appertains will readily understand how to make and use the devices and methods of the subject invention without undue experimentation, preferred embodiments thereof will be described in detail herein below with reference to certain figures, wherein:
Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject invention. For purposes of explanation and illustration, and not limitation, a partial view of an exemplary embodiment of a nozzle assembly in accordance with the invention is shown in
As further shown in
A method of spraying a fluid, includes feeding a stream through a primary passage 106 of a nozzle along a primary axis 102, producing a swirling fluid stream 108 along a secondary axis 120, at an angle to the primary axis, and reducing the swirl of the fluid by impinging the fluid against a series of standoffs 112 downstream of the secondary passages 108 and exiting nozzle thru annulus 104 at D1, producing a spray as shown in
The methods and systems of the present disclosure, as described above and shown in the drawings, provide for a nozzle assembly with superior properties including increased spray control. While the apparatus and methods of the subject disclosure have been showing and described with reference to embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the spirit and score of the subject disclosure.
