METHOD OF HYDRODYNAMIC TREATMENT OF A SURFACE AND A DEVICE FOR ITS REALIZATION Russian patent published in 2005 - IPC

FIELD: hydrocavitating methods of treatment of different surfaces.

SUBSTANCE: the invention is dealt with the hydrocavitating methods of treatment of the different surfaces and may be used for clearing of different composite surfaces including underbody surfaces of ships. The method provides for an action of at least two being under pressure cavitating water jets onto a zone of a surface under treatment. The action is realized with provision of intersection of the cavitating jets. For increasing concentration and maintenance of uniformity of cavitational bubbles in a zone of a surface of treatment the distance L between the longitudinal axes of the injectors of the cavitating jets was taken satisfying to the following ratio: , where is an angle of expansion of a cavitating jet, and d_i is a diameter of an injector. The distance h from injectors up to a zone of a surface of treatment is equal to an interval h = (40-60)d, and - an angle of expansion of a cavitating jet is in the interval . The device for realization of the method contains at least two injectors. Distance L between the longitudinal axes of the injectors is taken satisfying the ratio , where is the angle of expansion of the cavitating jet, and d_i is the diameter of the injector. At that - an angle of expansion of a cavitating jet is in the interval . The invention allows to increase effectiveness of treatment, to improve uniformity of treatment of the over-all surface, to increase concentration and to maintain uniformity of cavitation bubbles in a zone of a surface treatment, to reduce pressure.

EFFECT: the invention ensures increased effectiveness of treatment, improved uniformity of treatment of the over-all surface, increased concentration and uniformity of cavitation bubbles in a zone of a surface treatment, reduced pressure.

11 cl, 14 dwg