FROUDE INVENTED THE WATER BRAKE DYNAMOMETERS

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The Froude F Range Hydraulic dynamometers (also referred to as water brakes) have been designed to be compact, robust and to allow easy maintenance. Some of these models are available with a streamlined, fabricated base. This base is not only ultra durable due to the powder coating process, but also offers flexibility with water inlet/outlet placement and lifting eye locations.

These engine dynos are fitted with two half couplings which,
with the rotor, are oil injected onto the shaft. The standard machines run in grease lubricated rolling element bearings.


The hydraulic dynamometer working compartment consists of special semi-circular shaped vanes cast into stainless steel rotor and stators. Water flowing in a toroidal vortex pattern around these vanes creates a torque reaction through the dynamometer casing which is resisted and measured by a precision load cell. The dynamometer load is controlled by a 'butterfly' water outlet valve, operated by a closed loop electro-hydraulic servo system. The power absorbed by the dynamometer is carried away by the water in the form of heat.



KEY to Model Letter Designations: R= Reversible, D= Dual Compartment, AV= Axial Vane (bi-directional), GT= Gas Turbine, FRR= Fixed Return Ring



KEY to Numeric: F359: 35 = rotor size (inches), 9 = 90° crop on rotor


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Description

As standard, the F type machines are fitted with two half couplings allowing connection at either end.
These, along with the rotor, are oil injected on to the main shaft, thus eliminating stress raising keyways. Grease lubrication is replaced by the optional 'oil mist' system for the High Speed versions.
The dynamometer working compartment consists of special semi-circular shaped vanes cast into stainless steel rotors and stators. Water flowing in a toroidal vortex pattern around these vanes creates a torque reaction through the dynamometer casing which is resisted and measured by a precision load cell. The dynamometer load is controlled by a characterised water outlet valve, operated by a closed loop electro hydraulic servo system.

The power absorbed by the dynamometer is carried away by the water in the form of heat.

Applications

Development, production and post overhaul testing of:

Automotive gasoline and diesel engine
Industrial and marine diesel engines
High performance competition engines
Turboprop, turboshaft and power generation turbines
Engine components


Electric motors

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