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The technical  components

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1. Hydraulic steelwork

The steel welded construction with continuously welded screw blades ensures high stability. Its solid construction and generous use of material ensure a long service life. The gap-free design makes injury-free fish ascent possible.

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2. Substructure

The environmentally and fish friendly HYDROCONNECT ascent screw is installed in a concrete structure or steel frame. The design is very thin and therefore only requires a small amount of concrete and space.

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3. Fish ladder and attraction current

  • The fish transport is based on Archimedes’ principle: Fish are raised effortlessly upstream in the standing water of the screw chamber.
  • special shape of the screw blades to create an optimised guiding current
  • bottom connection for weak swimming fish such as the bullhead, for example

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4. Mounting

  • Top: an axial self-aligning roller bearing accommodates the axial forces
  • Bottom: the radial forces
    are accommodated by belts or rollers

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5. Generator works

  • Geared motor
  • Brake

Variable rotation speeds can be used through the implemented frequency converter technology

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6. Fish discharge chute

  • chute to transport the individually ascended fish into the calm headwater
  • minimum slope
  • can be disassembled

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7. Compensation water protection

  • Steel protection for regulating the amount of compensation water
  • Compensation of headwater level fluctuations
  • Seasonally dependent compensation water quantities
  • Fish descent possible
  • For bigger locations, the water can be used as a guiding current
  • The compensation water protection is controlled by level sensors and water quantity specifications

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8. Cover/housing

If, due to the place of use, there is a need for a cover, then it can be realised using wood, glass, stone, concrete or other materials. The belt capstan and generator works are covered as a standard feature for safety and protection against external environmental influences. Generally, no complete covering of the system is necessary.