(19)
(11) EP 0 267 444 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.01.1990 Bulletin 1990/05

(43) Date of publication A2:
18.05.1988 Bulletin 1988/20

(21) Application number: 87114883.9

(22) Date of filing: 13.10.1987
(51) International Patent Classification (IPC)4: F04D 29/62, F04D 13/10, H02K 5/173, H02K 7/14
(84) Designated Contracting States:
DE ES FR

(30) Priority: 11.11.1986 IT 2229686

(71) Applicant: GRUPPO INDUSTRIALE ERCOLE MARELLI S.p.A.
Arzignano (VI) (IT)

(72) Inventor:
  • Violi, Giuseppe
    I-Pogliano Milanese (MI) (IT)

(74) Representative: Forattini, Amelia et al
c/o Internazionale Brevetti Ingg. ZINI, MARANESI & C. S.r.l. Piazza Castello 1
20121 Milano
20121 Milano (IT)


(56) References cited: : 
   
       


    (54) Electric motor for submersible pump


    (57) In a submersible pump, the axial thrust exerted by the impeller of the pump is withstood by the upper bearings (6, 6ʹ) of the motor, and the stator (2, 3) of the motor is anchored and centered in the frame (1) by means of a system of projections (15a, 15f) provided in the wall of the frame and engaged in corresponding notches of the supporting system of the bearing and of the stator assembly. This produces a reduction in the dimensions of the motor shaft with a reduction of scrap, an improvement in electromechanical performance, as well as simplifi­cations and economies in construction and in assem­bly.







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