REFRIGERATION PUMP SERIES CAM1/CAM2

Axial thrust balancing The development of HERMETIC pump systems depended on the solution of a central problem, namely the elimination of axial thrust at the rotor equipment. The various fl uid properties exclude the possibility of using mechanical axial bearings. The only generally valid...

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Axial thrust balancing

The development of HERMETIC pump systems depended on the solution of a central problem, namely the elimination of axial thrust at the rotor equipment. The various fl uid properties exclude the possibility of using mechanical axial bearings.

The only generally valid solution to this problem thus lay in hydraulic balance of the rotor.

With canned motor pumps the axial position of the pump shaft is automatically regulated during operation to achieve a self-created balanced condition and thus, there are no effects by axial forces on the axial bearing collar.

The technical design of the axial thrust balancing generally depends on the construction size and stage number of the respective pump as well as on the liquid to be conveyed.

Example

Pump size CAM 1 and CAM 2

The axial thrust balancing is effected by back vanes and balancing borings on the fi rst impeller.

Pump size CAM 30 and CAM 32

The axial thrust balancing is guaranteed by a balancing disc (pump side arrangement) and balancing borings.

Pump size CAM 44 to CAM 64

The axial thrust balancing is guaranteed by a balancing disc (motor side arrangement) and balancing borings.

High system pressures

High system pressures (up to 1200 bar) can be handled by canned motor pumps in a technically simple manner. The wall thickness of the outer components corresponds to the required pressure rate.

High temperature design

The external cooling of the pump allows the application of liquids to be conveyed up to +400 °C. By default, when conveying these liquids, tubular coolers are used, but also plate coolers or air coolers can be used according to the production and plant conditions.

Design options

Barrel design

The number of stages determines the number of the required static gaskets. By using pressure barrels, this number can be reduced. Moreover, through the use of pressure barrels, higher system pressures can be achieved.

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