Two stage conveyorised machine cleans heavy rotors

Two stage conveyorised aqueous wash and dry machine is degreasing heavy steel generator rotors in a continuous and efficient manner at a rate of 90 parts per hour.

A world leader for electrical power generation and distribution equipment has recently installed a Guyson International Marr-Line two stage conveyorised aqueous wash and dry machine for degreasing electrical rotors prior to wire winding.

The heavy steel generator rotors are thoroughly cleaned of natural oil in a continuous and efficient manner at a rate of 90 parts per hour.

The wash solution used in the Guyson Marr-Line combines an alkali detergent cleaner with a Vapour Corrosion Inhibition (VCI) additive for post cleaning rust inhibition.

This combination efficiently removes a rape seed oil that lubricates the parts during a pressing operation used during assembly and has the added benefit of leaving the components protected for up to two weeks, an important consideration for the customer over weekends and shutdowns.

The machine is equipped with a stainless steel pump that draws the wash and VCI solution from an electrically heated 220-litre tank.

The cleaning solution is piped through a completely stainless steel spray bar network surrounding the conveyor and the travelling component and delivered with substantial impact to enable effective cleaning.

The used solution is returned through a removable filter basket to the tank to be re-heated and recirculated.

The wash tank is equipped with a low water level sensor, which stops the pump and switches of the tank heating if the solution drops below a pre-determined level.

To help prevent blockages an in-line 200-micron (washable element) filter is fitted between the pump and spray jets.

Component drying is by a direct drive centrifugal fan delivering heated air (regulated by digital temperature controls) and generated by a 9kW heater.

The heated air is directed to a series of louvers positioned above and below the conveyor a major percentage of this air is reheated and recirculated, the remainder is exhausted.

The machine features a jigged indexing conveyor, strengthened along its length and manufactured from stainless steel with non-metallic component supports that accept a wide range of component sizes.

A two-metre extension at the out-feed acts as a component accumulator, holding approximately ten components and allowing the process to continue until the conveyor has been fully loaded; a photoelectric cell prevents the conveyor from becoming over filled.

Back to top