US2993601A - Radial flow magnetic filter with radially directed magnetic flux - Google Patents

Description

y 1961 SABURO MIYATA MORIYA 2,993,601

RADIAL FLOW MAGNETIC FILTER WITH RADIALLY DIRECTED MAGNETIC FLUX Filed May 19, 1958 zw z w INVENTOR.

United States Patent 2,993,601 RADIAL FLOW MAGNETIC FILTER WITH RA- DIALLY DIRECTED MAGNETIC FLUX Saburo Miyata Moriya, 1960 Tomioka Machi Kanazawa Ku, Yokohama, Japan Filed May 19, 1958, Ser. No. 736,353 6 Claims. (Cl. 210-223) This invention relates to a radial flow magnetic filter with radially directed magnetic flux. More particularly the invention relates to a filter and/or water conditioner wherein the flow of fluid to be purified, or treated is radially inward from the exterior toward the axis of the filter, through a magnetic flux which is radial.

An object of this invention is the provision, in a radial flow filter, of an area under the influence of magnetic flux for removal of ferro-magnetic particles.

Another object of this invention is the provision of a radial flow filter having inner and outer cylindrical pole pieces.

A further object of this invention is the provisions of elements in an area of magnetic flux, for entrapment of ferro-magnetic particles.

' An additional object of this invention is the provision of a radial flow filter having a magnetic field of substantially Zero flux leakage.

Another object of this invention is the provision of a radial flow magnetic filter incorporating a'center column of an alloy of magnesium and aluminum which contacts the oil after being subjected to a series of alternating magnetic forces, to react with the acids in oily solutions, rendering them harmless.

An additional object of this invention is the inclusion in a radial flow filter, a center column of zinc, which contacts the water subjecting it to a series of alternating magnetic forces to retard rust formation, in an iron water system.

Still another object of this invention is the provision of a radial flow filter having an annular area of flux in which there are a plurality of magnetized screens.

A particular object of this invention is the provision of a pair of concentric pole pieces providing an area of magnetic flux therebetween and including in the flux area a multiplicity of N and S pole edges for attracting ferro-magnetic particles.

An additional object of this invention is the provision of a plurality of alternating N and S edges in the path of the flow of the water to cause disturbance of electrons in their orbits to reduce the adhering characteristics of scale forming compounds.

Another object of this invention is the provisions of inner and outer cylindrical pole pieces surrounding a core of aluminum-magnesium alloy.

An additional object of this invention is the provision of inner and outer cylindrical magnets surrounding an inner core of zinc.

A further object of this invention is the provision of radial flow magnetic filter having inner and outer cylindrical pole pieces of mild steel connected by radial spokes of highly permeable material.

These and other objects will appear in connection with the following specification taken with the accompanying drawings forming a part thereof.

In the drawings:

FIG. 1 is an elevation, partly in section, showing a form of construction of my ring magnets;

FIG. 2 is a plan view partly in section of the magnet of FIG. 1;

FIG. 3 is a vertical section of a magnetic filter incorporating magnets such as in FIG. 1; and illustrates the center column core piece.

FIG. 4 is a plan view of the filter of FIG. 3;

FIG. 5 is a plan view of a modified form of the filter, and

FIG. 6 is a fragmentary perspective of an expanded metal filter screen.

Referring now to the drawings wherein like characters of reference represent like parts throughout the several views, the numeral 10 indicates a ring magnet according to my invention. The magnet 10 comprises an outer annular pole piece 12 spaced from an inner annular pole piece 14. Between the pole pieces 12 and 14, I arrange a plurality of spokes 16 consisting of cylindrical permanent magnets \18, each having a cylindrical shield 20. The magnets 18 are preferably slightly countersunk into the pole piece 14, as at 22. A screw plug 24, preferably of paramagnetic material, is threaded into an opening 26 in the pole piece 12.

In FIG. 3, I show in phantom section a portion of a filter housing 28 having therein a filter 30 according to the present invention.

The filter 30 includes a plurality of superimposed spaced apart magnets 10, each having an outer pole piece 12 and an inner pole piece 14. Between the inner pole pieces 14, there is a spacer element 32 which may or may not be of paramagnetic material. The pole pieces 14 and the spacer 32 are preferably provided with mating rabbet and tongue portions as at 34. The pole pieces 12 and 14 are preferably formed of mild steel and the magnets '18 may be formed of any suitable high permeability material, but are preferably of the'type sold under the trade name, Alnico.

The construction of the magnets 10 having the bar magnet portions 18 and the shields 20 is similar to the construction disclosed in my co-pending application Serial No. 666,703, filed June 19, 1957. The powerful magnets 18 create an area of flux between the outer pole pieces 12 and the inner pole pieces 14. Since the surface area of the annular pieces '12 is greater than that of the annular pieces 14, the concentration of the flux is toward the axes of the annuli and there is substantially no external flux leakage. With the magnets 18 polarized as shown the outer annuli are N poles and the inner annuli are S poles.

In the space between the pole pieces 12, 14 and the respective spokes 16, I place an accordion pleated woven wire screen 36. Between the folds of the screen 36, I place sheets 38 of expanded metal of the type shown in FIG. 6. The sheets 38 are arranged in radial planes parallel to the axes of the pole pieces 12, 14 as can readily be seen in FIG. 4. Each of the sheets 38 provides a plurality of N and S edges as shown in FIG. 6. It is to be noted that in the sheets or magnets 38 having the N and S edges as shown in FIG. 6, the distance between each of the pairs of N and S poles is greater than the thickness of the material from which the expanded sheet is formed. These magnets are formed of sheets of expanded metal as illustrated in FIGS. 5 and 6 of my copending application Serial Number 669,113, filed July 1, 1957, and the N and S pole arrangement is the same as illustrated in said application. The above arrangement is also illustrated in FIG. 5, herein, wherein the plates are in the flux area of the magnets 18 and are therefore magnetized by such magnets 18. The sheets 38 will be magnetized as shown in FIGS. 3 and 6, and the numerous N and S edges will efiectively entrap any paramagnetic particles in a fluid passing through or between layers of screens.

The annular pole pieces 14 are provided with a plurality of radial openings for the passage of fiuids to the interior of the filter. In the interior core space of the pole pieces 14 and the spacer 32, I place a plurality of twisted liquid [for positive contact with preferably an alloy of magnesium and aluminum for the purpose of counteracting the acidsina fluid, especially oil, flowing through the filter. l

Fluid enters the filter 30 through the gap 46 between the pole pieces 12 and traverses the screens 36 and the plates 38 on its way through the openings 40. The screens 36 will entrap small particles of material. Paramagnetic particles which may pass through the screens 36 will be entrapped by the multiplicity of N and S edges of the plates 38. On reaching the bore 42 of the filter 30, the fluids encounter the ribbons or twisted X bar 44. The action of the ribbons of magnmium-aluminum alloy renders the acids harmless.

In FIG. 5, I show a form of filter for water conditioning. Here the filter 130 is generally similar to the filter 30 except that the screens 36 are omitted. In the bore 142, I place the twisted ribbons or twisted X bar 144 of zinc. The rings 112, 114 and the spokes 1 16 and the sheets 138 are like the corresponding parts in FIGS. 3 and 4. Fluid passing transversely through the sheets 138 and through the openings 140 enters the bore 142 and contacts the X bar 144. Galvanic action between the zinc X bar and the boiler or iron piping of the system causes the filterrto become also a rust inhibitor. The passage of water past the multiplicity of N and S edges, disturbs the electron movement about their nucleii and causes calcium carbonate particles to precipitate rather than to adhere to iron surfaces.

This invention is an improvement of the invention described in my co-pending application Serial No. 669,113, filed July 1, 1957, now Patent No. 2,951,586, dated September 6, 1960, and entitled Means and Method of Removing Paramagnetic Particles.

It is to be understood that though I have set forth spea cific examples of my invention, changes may be made within the skill of the art and the scope of the appended claims.

I claim: 7 p

1. A radial flux magnetic filter comprising inner and outer annuli of unlike polarity, said annuli enclosing an area subject to strong magnetic flux, arranged in axially extending radial planes expanded metal plates in said area, said plates being of paramagnetic material, said expanded metal providing a plurality of openings, and the offset metal between, the openings providing a multiplicity of N and S poles on opposite surfaces of said plates, 'for entrapment of ferro-magnetic particles, for positive contact with the fluid passing therethrougha 2. The structure according to claim 1, wherein the annuli are interconnected by a plurality of radial spokes, each spoke including a shielded bar magnet.

3. The structure according to claim 1, wherein the inner annulus is provided with a plurality of radial openings.

4. The structure accordingto claim 3 wherein a core space is provided within the inner annulus and wherein an X bar of non-ferrous metal, is placed in such space.

5. The structure according to claim 4, wherein the non ferrous metal is an alloy of aluminum and magnesium.

6. The structure according to claim 4, wherein the non-ferrous metal is zinc.

References Cited in the file of this patent UNITED STATES PATENTS

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