US 4,362,958 A · Electromagnetic coupling and cooling system therefor

Abstract

The present invention provides an electromagnetic coupling including a housing (13), the rotor (33), an inductor drum (25), including a generally cylindrical drum portion (27) having an outer heat dissipating surface including at least one generally circumferentially extending heat dissipating groove (57). A coil (47) is provided for coupling the rotor member and inductor drum. The housing includes openings therein for directing cooling fluid into the housing to dissipate heat generated in the inductor drum and a plurality of fluid directing means are attached to the outer heat dissipating surface of the inductor drum for rotation therewith. The fluid directing means (61) are obliquely disposed relative to the axis of rotation of the inductor drum to direct cooling fluid inwardly into heat dissipating grooves to cool the inductor drum. The utilization of fluid directing means which is obliquely disposed relative to the axis of rotation of the inductor drum substantially reduces the noise generated upon rotation of the inductor drum.

Claims19

Dependent claims

An electromagnetic coupling comprising:

(a) a housing;
(b) a rotor member disposed in said housing;
(c) inductor drum means disposed in said housing and rotatable about an axis of rotation relative to said rotor member;
(d) coil means for producing an electromagnetic field for electromagnetically coupling said rotor member and said inductor drum means;
(e) said inductor drum means including a generally cylindrical drum portion, said drum portion defining an outer, heat-dissipating surface, said heat-dissipating surface including a plurality of circumferentially extending, heat-dissipating grooves spaced apart along the longitudinal axis of said cylindrical drum portion;
(f) means for directing cooling fluid into said housing to dissipate heat generated in said inductor drum means;
and
(g) a plurality of fluid-directing means attached to said outer, heat-dissipating surface of said inductor drum means for rotation therewith, said fluid directing means being obliquely disposed relative to said axis of rotation for directing said cooling fluid inwardly into said heat-dissipating grooves to cool said inductor drum means.

5 more elements

An electromagnetic coupling comprising:

(a) a housing;
(b) a rotor member rotatably disposed within said housing;
(c) inductor drum means rotatably disposed about an axis of rotation in said housing and rotatable relative to said rotor member;
(d) said inductor drum means including a generally cylindrical drum portion defining a generally cylindrical, outer, heat-dissipating surface, said heat-dissipating surface defining at least one circumferentially extending, heat-dissipating groove extending substantially perpendicular to the longitudinal axis of said cylindrical drum portion;
(e) coil means for establishing a flux path upon energization thereof to electromagnetically couple said rotor member and said inductor drum means;
(f) means for directing cooling fluid to the interior of said housing to dissipate heat generated in said inductor drum means, said cylindrical drum portion being substantially impermeable to radial flow of said cooling fluid;
and
(g) a plurality of fluid-directing members disposed contiguous to said outer, heat-dissipating surface, and attached thereto, said fluid directing members being obliquely disposed relative to said axis of rotation and directing said cooling fluid inwardly into said heat-dissipating groove to effect cooling of said inductor drum means.

5 more elements

Dependencies are inferred from the claim text.

Electromagnetic coupling and cooling system therefor

Life of this patent

Electromagnetic coupling and cooling system therefor

Life of this patent

Abstract

Claims19