US2583522A - Fluid purifier - Google Patents

Description

1952 c. A. WINSLOW ET AL 2,583,522

FLUID PURIFIER Filed April 27, 1948 INVENTORS CHARLES A. W/NSLOW JOHA/J MEYER Evy/Ma A T TOR/V5 Y fixed positions.

the purifier except the actual magnet elements, the screen 30 is made of non-magnetic material, and preferably is of fine mesh. Thus, the screen 30 acts not only as a screen to remove nonmagnetic foreign matter from the oil as it passes from the inlet to the outlet, but also as a flow control. The fine gauge screen restrains the fluid sufiiciently so that it passes from the inside chamber 3| to the outside chamber 32 along the full surface of the screen 33, with the result that the flow tends to be more'strongly axial and less strongly radial or outward. This action tends to fiow impurities along with the fluid toward the sump 20| where they may be readily blown out during operation by opening the valve 202. Axial flow in the casing thus assuring introduction of the oil into the magnetic field, can be further obtained by substantially equating the force necessary to fiow the oil through the screen, to the fluid flow in the system, the actual force depending on the oil pressure and velocity in the system, the total area of the screen openings and the total resistance to fiow through all the small openings.

The ribs 200 in the cap 20 supports in the center chamber 3| a magnet assembly, shown generally at 40. The assembly 4|] comprises a non-magnetic rod 4|, threaded into the axial tap 25 and steadied against the boss 24 by the nut 42. Mounted on the rod 4| are a plurality of alternately-positioned magnetic elements 43 and non-magnetic spacing members 44. A nut 45 and washer 46 on the end of the rod 4| hold the elements 43 and spacers 4'4 in prearranged,

Each individual magnetic element 43 is shaped as shown in Fig. 2-a torus or annulus broken at one end, to form a round, horseshoe magnet with the north and south poles separated by a gap 41. When the elements 43 are placed on the rod 4|, they are disposed so that the poles face in all different directions and provide a substantially uniform field of at least the radius of the chamber 3|. By using a plurality of magnetic elements 43 in the assembly 40, a much stronger and more even field is obtained than can be obtained by using a single bar magnet similarly disposed. Since the volume of the magnetic field equals or isgreater than the volume of the chamber 3|, every ferromagnetic particle passing from the inlet l2 to the outlet l8 enters the magnetic field and becomes subject to it at the same time that the fluid momentum is restrained Within the limits of the magnetic field by the screen 30.

On operation, the oil fiows through the central inlet I2 into the chamber 3|. The screen 30 .controls its flow, making it substantially axial particles from the oil, and heavy particles are 1 its outer edge out through the screen 30 into the outer chamber 32 and thence to the vertical outlet I 8, purified of the solidparticles and especially of the ferromagnetic particles.

The mounting of both the screen 30 and magnet assembly 40 on the hollow cap 20 renders withdrawal replacement, and cleaning simple.

When the screws 2| are taken out, the purifier may be withdrawn from the housing. The screen 36 can be pulled out from the cap flange 22, and it and the magnet assembly 40 brushed off, reassembled, and the whole purifier then put back in the passage 4. It will be understood that axial direction of fiuid flow and velocity of same causes all material collected which is not firmly held by the magnets to be collected in the sump Zlll. It is to be further understood that when the invention is used under pressure that opening of the valve 202 would cause all collected material not firmly attached to magnets to be blown out through the opening 203, thus cleansing the screen 36 and magnets 93, as well as removing all other collected material in th sump 2U| and chamber 3|.

We claim:

1. A magnetic filtering device for flowing fluids comprising an elongated housing having a cylindrical walled chamber therein, an inlet opening in one end of the housing co-axial with said chamber, an outlet opening from said chamber in the side wall of the housing, a cap removably secured to the opposite end of the housing and having a cylindrical flange extending within said chamber, a boss rigidly supported within said cap in co-axial relation to said inlet opening and said cylindrical flange, an elongated magnet assembly disposed within the chamber and having one. end thereof removably supported by said boss, said housing being also provided with an inwardly directed flange surrounding said inlet opening and provided with an outer frustoconi cal wall converging toward said opposite end of the housing and being in co-axial relation to said cylindrical flange, the inner converging end portion of said Wall being of less diameter than the inner surface of said cylindrical fiange, and a cylindrical filter screen having one end thereof removably seated within said cylindrical flange and its opposite end freely engaged over said frusto-conical wall, whereby said screen is removable as a unit with said cap and concentrically supported with respect to said magnet assembly by said frusto-conical wall.

2. The device according to claim 1', wherein said magnet assembly comprises an elongated non-magnetic rod, having one end thereof threaded into said boss, and the opposite end thereof freely disposed adjacent the inner end of said inwardly converging flange, a plurality of horseshoe magnets supported on said rod, a plurality of non-magnetic spacing members disposed on said rod between said magnets for maintaining same in uniformly spaced relation. and said magnets being arranged on the rod with their poles facing in different directions radially of the rod for providing a substantially uniform magnetic field about the magnet assembly and within the screen.

CHARLES A. WINSLOW. JOHN J. MEYER.

REFERENCES CITED The following references are of record the file of this patent:

UNITED STATES PATENTS Feagin May 7,1946

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