Equipment and technology for cleaning of immersion centrifugal pump wheels and distributors

In the Science and Technology Center "VEGA" the technology and equipment are developed providing for a high degree of salt deposit removal (98% of initial volume) from wheels and distributors of immersion centrifugal electric pumps (ICE).

 

Before cleaning After cleaning

 

An operating principle of the equipment is grounded on use of high-voltage discharges in a liquid produced between an electrode and a treatable object and accompanied by a complex of physical phenomena, the so-called electrohydraulic effect being an electric explosion in a liquid generating a powerful pressure pulse transferred by the discharge channel to the treatable object body, powerful shock waves and liquid hydrostreams. Their complex effect initiates oscillations both in a treatable object body and in salt deposit, evoking crack formation in the later and also their delaminating from the surface of treatable objects.

Serially produced multiple-purpose electrohydropulse plants, even the least powerful (models 36121А, 36151А) have 10 times greater capacity of a pulse than needed for treatment of wheels and especially ICE distributors and, as experimental application for these purposes of the EHP of model 36121А (Almetevsk) has shown, the treatment process here becomes complicated and crushing of products during treatment is not excluded, first of all with respect to distributors.

To maintain optimum technological treatment modes, the structural layout of a low-power electrohydropulse plant is developed and tested having the following technical characteristics:

Productivity, pc./h 25-50
Consumed power, kW, no more than 2,0
Occupied area, m2, no more than 2,0
Water rate, l/h, no more than 1,5
Stored energy in a pulse, kJ 0,4
Pulse repetition frequency, Hz 2,5
Weight, kg, no more than 200
Quality of salt deposit removal, % 98+2

 

Wheels and distributors are cleaned in a following way.

The part to be treated is fixed by a special appliance inside the working chamber. The chamber closes, the water booster pump and the high-voltage equipment switch on, process of treatment starts that is carried out automatically. Upon termination of treatment the equipment is disconnected, the chamber opens and from it the cleaned product is extracted and replaced by a new object. The cycle repeats.

The specialists from the Science and Technology Center "VEGA" render their assistance to the Clients in mounting, adjustment and commissioning of EH plants, consult on the issues concerning the technology of electrohydraulic treatment taking into account their specific features and range, train the service personnel, perform warranty and post-warranty service of the equipment. For specific orders STC "VEGA" at IPPT can develop a special design project of EHP proceeding from the Client’s local conditions (product range, available buildings, etc.).

Next