Shunt reactor having improved insulating fluid circulating means

Claim 2

A shunt reactor having increased flow of insulating fluid through cooling ducts in the reactor coil comprising, in combination, a casing, insulating fluid within said casing, a shunt reactor coil and yoke assembly immersed in said fluid within said casing including a cylindrical coil having a plurality of vertical cooling ducts extending therethrough between coil conductor turns so that said insulating fluid circulating through said cooling ducts is in heat exchange relation with said conductor turns and also having a vertically extending axial window and closed laminated magnetic yoke means enclosing said coil and having upper and lower horizontal laminated magnetic yoke portions having a width approximately equal to the diameter of said coil disposed adjacent to and covering both ends of said coil for straightening the lines of magnetic flux within said coil and said axial window, said magnetic yoke means having no laminations within said axial window, spacer means for forming horizontal radial ducts for said insulating fluid between the axial ends of said coil and said upper and lower horizontal yoke portions, said horizontal radial ducts communicating with said vertical ducts through said coil, cooling radiator means on a sidewall of said casing communicating with said insulating fluid and the interior of said casing adjacent both the upper and lower ends thereof, pump means for circulating said insulating fluid from the upper portion of said casing downwardly through said cooling radiator means and into said lower portion of said casing, and barrier means for blocking upward flow of said insulating fluid within said casing between said coil and yoke assembly and the sidewalls of said casing, whereby said pump means creates a pressure differential between the upper and lower portions of said casing and increases the upward flow of said insulating fluid through said vertical cooling ducts in said coil.

Claim 3

A shunt reactor in accordance with claim 1 wherein said barrier means includes a fluid-blocking member on said coil and yoke assembly extending horizontally therefrom toward a sidewall of said casing and an elongated flexible member affixed to a casing sidewall and extending inwardly and downwardly of said casing to a position where it interferes with, and is pushed toward said casing sidewall by, said fluid blocking member when said coil and yoke assembly is lowered into said casing, thereby forming a dam between said fluid-blocking member and said flexible member which prevents upward movement of said insulating fluid along said casing sidewall.

Claim 4

A shunt reactor in accordance with claim 2 wherein said barrier means also includes an insulating collar surrounding said coil and having a peripheral flange extending horizontally therefrom and said fluid-blocking member is a horizontal plate having one edge in overlapping relation with said peripheral flange on said insulating collar.

Claim 5

A shunt reactor in accordance with claim 3 where said peripheral horizontal flange is flexible and said fluid-blocking plate is rigidly held on said coil and yoke assembly and said edge thereof in overlapping relation to said peripheral horizontal flange conforms to the outer periphery of said coil.

Claim 6

A shunt reactor in accordance with claim 1 wherein said means for forming horizontal radial ducts includes horizontal flat annular washers having elongated radial spacers affixed to both surfaces thereof and a plurality of apertures through said washer.

Claim 7

A shunt reactor in accordance with claim 2 wherein said casing has vertical side and end walls and said barrier means includes fluid-blocking members affixed to and extending horizontally from the sides and ends of said coil and yoke assembly and elongated flexible members affixed to the interior surface of said casing sidewalls and end walls of extending inwardly and downwardly thereof to a position where they interfere with, and are pushed outwardly by, said fluid-blocking members when said core and yoke assembly is lowered into said casing.

Claim 8

A shunt reactor in accordance with claim 2 having means including upper side frame members disposed on opposite sides of said upper yoke portion for clamping said laminations of said upper yoke portion, means including lower side frame members disposed on opposite sides of said lower yoke portion for clamping said laminations of said lower yoke portion, and vertical tie members connecting said upper and lower side frame members.

Claim 9

A shunt reactor in accordance with claim 7 wherein said fluid-blocking plate is held on said coil and yoke assembly in vertical spaced relation to one of said lower side frame members to define a horizontal aperture for said insulating fluid leading to said vertical ducts and said means for forming horizontal radial ducts at the lower end of said coil includes a horizontal flat annular washer having elongated radial spacers affixed thereto disposed between the lower end of said coil anD said lower yoke portion and approximately in the plane of said horizontal aperture.

Claim 10

A shunt reactor in accordance with claim 8 wherein said coil is wound from conductive sheet material and said annular washer has a plurality of apertures therethrough and said radial spacers are affixed to both the upper and lower surfaces of said washer.

Claim 11

A shunt reactor in accordance with claim 2 wherein said laminated magnetic yoke means have spacers between certain laminations providing vertical cooling ducts for said insulating fluid through said yoke means.

Claim 12

A coreless iron shunt reactor having means for increasing flow of insulating fluid through ducts in the reactor coil comprising, in combination, a casing, insulating fluid within the casing, a shunt reactor coil and yoke assembly immersed in said fluid within said casing including a cylindrical coil having a plurality of vertical cooling ducts extending therethrough between coil conductor turns so that said insulating fluid circulating through said cooling ducts is in heat exchange relation with said coil conductor turns and also having a vertical extending axial window and a closed magnetic yoke having magnetic steel laminations in vertical planes enclosing said coil and having upper and lower horizontal yoke portions approximately as wide as the diameter of said coil disposed above and below the axial ends of said coil respectively connected by end vertical yoke portions, said magnetic yoke having no laminations within said axial window, said coil and yoke assembly also having means including upper horizontal structural iron side frame members disposed on opposite sides of said upper yoke portion for clamping said laminations of said upper yoke portion, means including lower horizontal structural iron side frame members disposed on opposite sides of said lower yoke portion for clamping the laminations of said lower yoke portion, and vertical tie members connecting said upper and lower side frame members, cooling radiator means on a sidewall of said casing communicating with the interior of said casing adjacent the upper and lower ends thereof, pump means for circulating said insulating fluid from the upper portion of said casing downwardly through said cooling radiator means and into the lower portion of said casing, spacer means for defining horizontal radial ducts for said insulating fluid between the ends of said cylindrical coil and said upper and lower yoke portions and communicating with said vertical ducts, and barrier means for blocking upward flow of said insulating fluid between said coil and yoke assembly and the side and end walls of said casing and including oil-blocking members extending horizontally from the sides and ends of said coil and yoke assembly and elongated flexible members affixed to said casing side and end walls and extending inwardly and downwardly of said casing to a position where said flexible members interfere with and are bent toward said casing walls by said oil-blocking members when said coil and yoke assembly is lowered into said casing.

Claim 13

A coreless iron shunt reactor having means for increasing flow of insulating fluid through ducts in the reactor coil comprising, in combination, a casing, insulating fluid within the casing, a shunt reactor coil and yoke assembly immersed in said fluid within said casing including a cylindrical coil having a plurality of vertical cooling ducts extending therethrough between coil conductor turns so that said insulating fluid circulating through said cooling ducts is in heat exchange relation with said coil conductor turns and also having a vertical extending axial window and a closed magnetic yoke having magnetic steel laminations in vertical planes enclosing said coil and having upper and lower horizontal yoke portions approximately as wide as the diameter of said coil disposed above and below the axial ends of said coil respectively connected by end vertical yoke portions, said magnetic yoke having no laminations within said axial window, said coil and yoke assembly also having means including upper horizontal structural iron side frame members disposed on opposite sides of said upper yoke portion for clamping said laminations of said upper yoke portion, means including lower horizontal structural iron side frame members disposed on opposite sides of said lower yoke portion for clamping the laminations of said lower yoke portion, and vertical tie members connecting said upper and lower side frame members, cooling radiator means on a sidewall of said casing communicating with the interior of said casing adjacent the upper and lower ends thereof, pump means for circulating said insulating fluid from the upper portion of said casing downwardly through said cooling radiator means and into the lower portion of said casing, spacer means for defining horizontal radial ducts for said insulating fluid between the ends of said cylindrical coil and said upper and lower yoke portions and communicating with said vertical ducts, and barrier means for blocking upward flow of said insulating fluid between said coil and yoke assembly and the side and end walls of said casing and including oil-blocking members extending horizontally from the sides and ends of said coil and yoke assembly and elongated flexible members affixed to said casing side and end walls and extending inwardly and downwardly of said casing to a position where said flexible members interfere with and are bent toward said casing walls by said oil-blocking members when said coil and yoke assembly is lowered into said casing.

Claim 14

A shunt reactor in accordance with claim 11 wherein said barrier means includes an angle collar surrounding said cylindrical coil and having a flexible horizontally extending flange and at least one of said oil-blocking members is a horizontal plate having an edge conforming to the outer periphery of said coil and engaging said flexible flange on said angle collar in overlapping relation to form a dam preventing upward movement of said insulating fluid in paths bypassing said coil.

Claim 15

A shunt reactor in accordance with claim 12 wherein said oil-blocking plate is spaced above one of said lower side members and forms therewith a horizontally extending aperture for said insulating fluid approximately in the plane of said radial ducts.

Claim 16

A shunt reactor in accordance with claim 13 wherein said coil is wound from conductive sheet material and each of said spacer means for forming horizontal Ducts includes an annular insulating washer having a plurality of elongated insulating radial spacers affixed to each surface thereof and a plurality of apertures therethrough communicating with said vertical ducts in said coil.

Claim 17

A shunt reactor in accordance with claim 14 wherein said magnetic yoke has spacer means between certain of said laminations providing cooling ducts through said magnetic yoke for said insulating fluid.

Claim 18

A shunt reactor in accordance with claim 2 wherein said coil and yoke assembly includes a plurality of cylindrical coils with their axes aligned in a vertical plane and each having a plurality of vertical cooling ducts therethrough and a vertically extending axial window and said closed laminated yoke means encloses said plurality of cylindrical coils with said upper and lower horizontal yoke portions covering both axial ends of each of said plurality of cylindrical coils.