PUMP PLANT Russian patent published in 2009 - IPC F04B47/06 

FIELD: engines and pumps.

SUBSTANCE: proposed pump plant comprises cylindrical linear induction motor (LID) with stator 1 embracing plunger-rotor 2. The latter represents ferromagnetic tube for fluid passage. Valve 3 are arranged along tube 2. The latter moves in housing 4. LID stator is rigidly fixed in housing 4 with the help of plug 5. Housing 4 and tube 2 intercommunicate via mechanical power accumulator 6. End faces of the latter are rigidly coupled, via flange 7, with the tube and, via plug 5, with housing 4, for example by welding or by whatever other known method. Stator windings are connected, via control station, to power source. Control station is furnished with plunger-rotor rate pickup and stator supply system phase switch. Proposed has only one phase intermittently gets switched off, and two phases are not switched. Note here that motor does not go off and, intermittently changes over from three-phase into two-phase mode.

EFFECT: reduced transient switching processes.

1 dwg