Nozzle head with improved wear-resistant and sealing properties

A nozzle head assembly, comprising:

• a driven nozzle carrier supported for rotation about a longitudinal axis and provided with spray nozzles;
• a stationary housing formed with a pressurized water connection;
• a shaft rotatably supported in the housing and secured to the nozzle carrier, said shaft having a central passage for conducting pressurized water to the spray nozzles;
• and
• a sealing assembly positioned at a nozzle carrier distal end face of the shaft and including a first sealing disk of highly wear-resistant material, said first sealing disk bearing upon the nozzle carrier distal end face of the shaft and formed with a central passage, a first mounting for so securing the first sealing disk to the shaft as to allow a conjoint movement with the nozzle carrier and the shaft, a second sealing disk made of highly wear-resistant material, said first sealing disk having a pressurized water connection proximate end face which bears upon an end face of the second sealing disk, and a second mounting fixed in the housing for placement upon the second sealing disk,
• wherein the second sealing disk has another end face directed toward the pressurized water connection and shaped of convex configuration, said assembly including a support body having an end face exhibiting a concave configuration and bearing upon the convex end face of the second sealing disk.

A nozzle head assembly, comprising:

• a driven nozzle carrier supported for rotation about a longitudinal axis and provided with spray nozzles;
• a stationary housing formed with a pressurized water connection;
• a shaft rotatably supported in the housing and secured to the nozzle carrier, said shaft having a central passage for conducting pressurized water to the spray nozzles;
• and
• a sealing assembly positioned at a nozzle carrier distal end face of the shaft and including a first sealing disk of highly wear-resistant material, said first sealing disk bearing upon the nozzle carrier distal end face of the shaft and formed with a central passage, a first mounting for so securing the first sealing disk to the shaft as to allow a conjoint movement with the nozzle carrier and the shaft, a second sealing disk made of highly wear-resistant material, said first sealing disk having a pressurized water connection proximate end face which bears upon an end face of the second sealing disk, and a second mounting fixed in the housing for placement upon the second sealing disk,
• wherein the sealing assembly includes a seal ring positioned in a receptacle of the shaft between the first sealing disk and the adjacent end face of the shaft and being made of a material selected from the group consisting of rubber and plastics.