Revolving sprinkler

A method for maintaining essentially constant a rotation velocity of a revolving sprinkler even under large throughput variations, the method comprising:

• providing a turret assembly rotatable around an axis, said assembly being adapted to be coupled to a flow of a liquid, providing a first mouthpiece for mounting in said assembly to sprinkle said liquid under pressure at a first preset throughput at a given liquid pressure, said mouthpiece including a nozzle having a flow outlet located at a first moment arm linear distance from said axis of said assembly so that flow of liquid from the nozzle of said mouthpiece imparts on said assembly a driving moment causing assembly rotation;
• and
• providing a base assembly that serves as a bearing for rotation of said rotatable turret assembly around said axis and routes said flow of liquid to said turret assembly;
• and
• providing a second mouthpiece for selectively replacing said first mouthpiece, said second mouthpiece having a second throughput at the given liquid pressure different than said first throughput, and including a nozzle having a flow outlet located at a second moment arm linear distance from said axis different than said first moment arm linear distance, such that, after said first mouthpiece is replaced by said second mouthpiece, said driving moment causing the rotation of said rotatable turret assembly around the axis remains essentially equal to the driving moment generated when said first mouthpiece was mounted in said assembly.

A revolving sprinkler comprising:

• a turret assembly rotatable around a rotation axis, said assembly having an inner space that can be coupled to a flow of liquid under pressure, and two brackets that are essentially located in a plane perpendicular to said rotation axis, wherein each of said brackets is positioned on a respective opposing side of said rotation axis and the brackets are mutually parallel and coupled to flow of liquid from said inner space;
• and said rotatable turret assembly further comprises:
• two mouthpieces each adapted to be installed at a respective bracket of said brackets, each mouthpiece having a nozzle having a flow inlet and a flow outlet and, wherein
• after installing each of said mouthpieces at the respective bracket, the flow outlet of the nozzle of a first mouthpiece of said two mouthpieces points in a direction essentially opposite to the flow outlet of the nozzle of a second mouthpiece of said two mouthpieces, and said flow outlets are situated at given moment arm linear distances from said rotation axis of said rotatable turret assembly, and said flow inlets of said nozzles are coupled to the flow of said liquid under pressure;
• and
• said revolving sprinkler further comprises:
• a static base assembly that serves as a bearing for rotating said rotatable turret assembly around said axis;
• and
• said base assembly has an internal conduit for routing said flow of said liquid under pressure into said inner space of said turret assembly, and whence, via said brackets, to said nozzles of said two mouthpieces, and from the nozzle flow outlets, outwards, so that outwards flow of said liquid from said flow outlets of said nozzles, impart to said turret assembly a driving moment that causes assembly rotation relative to said base assembly;
• and
• said revolving sprinkler further comprises:
• a viscous damping mechanism coupled to said rotatable turret assembly for slowing down rotation velocity of the assembly, the mechanism including:
• a revolving dynamic component that constitutes a part of said rotatable turret assembly;
• a static component affixed to said base assembly and located in relative proximity to said revolving dynamic component, said static component together with the revolving dynamic component demarcate a sealed basin;
• and
• a viscous fluid filling said sealed basin which opposes motion of said revolving dynamic assembly relative to said static component;
• and wherein at least one mouthpiece of said two mouthpieces is adapted to be dismantled from the respective bracket at which said at least one mouthpiece is installed, and further comprising another mouthpiece, that replaces said at least one mouthpiece and differs from said at least one mouthpiece, in throughput of said exiting liquid from a flow outlet at a given liquid pressure, and in moment arm linear distance of said flow outlet from said rotation axis, wherein even after replacing said at least one mouthpiece by said another mouthpiece, said driving moment that brings about the rotation of said turret assembly remains essentially equal to said driving moment generated when said first mouthpiece was mounted in said turret assembly, whereby rotation velocity of said rotatable turret assembly remains essentially constant as an outcome of essentially constant driving moment exerted on the assembly, whether said at least one mouthpiece is installed in said rotatable turret assembly or if rather said another mouthpiece is installed in said rotatable turret assembly.