Modification of existing pump systems possible without much effort
Standard redesigning sets for variable pumps
HYDROMATIK A2VK and ROTARY POWER type C available
Other assemblies in combination with KTR hydraulic components on request
On request KTR develops customized special solutions in combination with KTR hydraulic components which allow to retrofit existing systems with MINEX®-S without much effort. Please contact your local sales partner directly.
The coupling consists of an external and an internal rotor. The external rotor has high-quality, permanent magnets of changing polarity on the inner side and the internal rotor has them on the outside. The external rotor is normally fixed on the drive side and the magnets are glued in the keyways. The magnets of the driven-sided internal rotor are cylindrically ground to ensure a minimal air gap and encapsulated through a magnetic cover that is impervious to fluids.In their non-operative states the north and south poles of the rotors are opposite to each other and the magnetic field is completely symmetric. It is only when the rotors are twisted that the magnetic field lines are moved, hence the torque is transmitted through the air gap. Then there is a synchronous operation under a constant torsion angle.If the maximum coupling torque and the maximum torsion angle are exceeded, the power transmission is interrupted. Thus the MINEX®-S offers an overload protection function of the drive train. After removing the cause of the overload (e. g. damage to the bearing, blocking of the internal rotor) both rotors can be synchronised again and operation is resumed.
The main component of the MINEX®-S is the containment shroud that is fixed to the driven-sided power unit and separates internal and external rotor from each other. It ensures a low-vibration torque transmission working without mechanical connection and guarantees a completely leak-proof separation of product and atmosphere. The sealing is achieved with a flat seal or an o-ring, thus eliminating the need to dynamically load the sealing elements.
Containment shrouds made of stainless steel or Hastelloy provide for a high resistance to pressure and temperature and cover a wide range of applications. They have proven their worth in numerous applications of pumps and agitators. Inside the rotating magnetic field they generally cause losses of eddy current which are converted into heat and which may require cooling measures. On applications with pumps the heat produced can basically be dissipated by the medium to be pumped. The loss of eddy current needs to be considered with the selection of the coupling.
Flange pumps having a conventional shaft seal as a standard design such as packing gland, slide ring seal or something similar can be retrofitted with MINEX without considerable efforts in designing.
Conveying and proportioning the media polyol and isocyanate in the processing plants for PUR, ambient air has to be prevented from penetrating into the process, since otherwise unwanted reactions may be produced.
For a reliable sealing of such drives KTR offers standard sets for retrofitting, among others for axial piston pumps type REXROTH A2VK and ROTARY POWER C series offering the following benefits:
• Maintenance-free operation
• Standstill periods are considerably reduced
• No more problems with sealing
• Better efficiency and process safety
The assemblies are available for all motor-pump-combinations and in various materials.