US1558696A - Rotary pump - Google Patents

Description

Oct .27. l925- Y F. MARION ROTARY PUMP 2 Sheets-Sheet. 14

Filed Dec. a, 1922 Y 1,558,696 F. MARION ROTARY vPUMP Filed Dec. 8, 1922 2 Sheets-Shi". 2

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. UNITE-D STATES PATENT OFFICE.

h veinem: HAMON, or LEBANON, NEW HAMPSHIRE, AssIoNoR or ONE-Hann 'ro JAMIE i n. JAcons, or nanna, VERMONT. Y

Application led December 8, 1922. Serial No. .605,686.4

To all whom# may concern Be it 'known that I, FRANK MARION, a

'citizenA of the United States, residing at Lebanon, in the county of Grafton and State of New Ham shire, have invented certain new and useiiil Improvements lin Rotary Pumps, 'of which the following is a specification.-V i

The Object of this invention is to effect improvements in pumps of that type in which a eylindrica rotor with radially extended spring-pressed vanes is mounted to rotate concentrlcally in a cylindrical casing, and at one side an abutment is provided through which water is drawn ,and discharged, and which also serves as a cam to bear the vanes` inwardly, and to maintain' contact with the rotor between the vanes and thusf separate the intake from the dise' charge side of the pump. It is aspecic object of the invention to. eifect improvements in the abutment device, to the end that a dependable abutment will be provided which will be liable in a minimum degree to impairment by wear, and will functionl efficiently to compensate -for wear on the face exposed to the rotor andl vanes. It is van important purpose to provide an abutment of this character which will'coact with the vanes to obviate the liability of uneven wear of the vanes tending to -produce irregularities in the' surface, and cause the vanes to wear evenly, so that at all times they will fit snugly-against the cylindrical wallsA of the caslng. It is a further important Object toy provide a'novel construction'of vane and abutment in combination, whereby the vanes, having 'assages therein for relief of pressure behin the vanes when retracted, and openin ends of the vanes. wil coact 1n a peculiai` way with the openings in the abutment to `obviate liability of uneven wear in surfaces of the abutment and casing and also prevent shearing wear, or liability of the parts to interloc Additionalbbjects, jadvanta es and features of invention reside in t e particular construction, arrangement and the combination of parts as will hereinafter be .understood fromthe description `and drawings, in the latter of which, l Figure 1 is a vertical sectional v1ew in the major plane of a pump constructed 1n accordance with 4my invention, l

through the outer Fig. 2 isa ment element,

Fig.v 3 is a fragmentaryl cross section on the line 2 2 of Fig. 1,.

Figure 4 is a projected plan of the perimperspective `view of the abutetral plane of the pump chamber, the vane being dotted thereover. v

Figure v5 is an endv face view of one of the vanes.

There is illustrated a pump'comprisin a body 10l which may be Open at both si `es and closed at these sides by plain casing heads in accordance with familiar practice in such constructions, these heads not bemg illustrated. The casing is formed With;l a cylindrical chamber 11, and a footing 12 by which it may be secured upon a foundation.

From the chamber 11, at the upper part,

there is an extensionvertically, forming a rectangular abutment chamber 13, havu parallel sides .intersecting thel perimetr Through the lparallel tension 16 having arallel sides transversely of the'casing is ormed, which-receives 'a central boss or rib` 17 of an abutment 18 which fitsv snugly in the chamber 13,.but slidably for' movement radially 'with Vrespect to the chamber 11. `A cylindrical rotor 19 is concentrically mounted for rotation in the chamber v11, being of a diameter less than that of the chamber, thus providing a assage 20 between the casing and rotor o an even dimension throughout the major part of its length, this space being restricted onl by the abutment 18, which is formed wit an arcuate inner face 2l ada ted to bear upon the rotor centrall of tie abutment with its end portions a jacent the parallel walls of the chamber 13- rst mentioned nearly orquite' alining with the perimetral wall of the chamber 11. In the ends of the abutment 18 vcored `inlet and outlet passages 22 and 23 respectively, are formed, opennig into communlcation with the yopenings 14 and 15 respectively. Between these pas sages 22 and 23 and the chamber 11, agrill is formed, lhaving a, pluralit of transverse i The rotor 19 is fixed upon a shaft, and visu; formed with diametrically opposite slots 27' extending through both sides of the rotor and its periphery, but stopping short of the may be seen in Fig. 3. The vanes are formed with a suitable number of passages 31 extending from the inner ends and opening on the outer ends, for relief of pressure in the slots 27 when the vanes are pressed-inwardly. Formed medially acrossthe outer ends of the vanes there are transverse channels 32, which stop short of the sides of the varies a dis; tance corresponding to the thickness of the walls 25 of' the'abutment.

The abutment 18 is held in operative relation with the rotorby means of a spring 33 set in a suitable recess 34 lin the element 17 ofthe abutment, this spring being borne -upon by an adjustable screw 34 inserted through the top of the casing 1'0 from without, by which pressure upon the abutment.

may be regulated. The curve of the face 21 of the abutment is such that the abut- -ment will operate as avcam in retracting the varies and also maintain a close bearing upon the rotor between the vanes; to prevent leakage of `fluid from the discharge side to the intake side ofthe pump. The two end face 36. The part ot the face of the circumscribing. wall and abutment of the chamber 11 traversed b v the surfaces 36 and which will be exposed within the end ofthe channel 32 as the rotor completes each rotation, will be termed the medial zone. This leaves at each side two lateral zones on the circumscribing wall and abutment which are travelled by respective surfaces 35 of the vane.

The ports 24 are of a width circumferentially of the chamber .less than the thickness of the varies, and the channels 32 are assured.

likgwise narrower than'the bars 25 Further-and what is most important for the ends in view-the aggregate measurement ofy the faces 36 circumferentially of the chamber or rotor forms a slightly smaller proportion of the aggregate of the corresponding surface measurements of the medial zone than the similar measurement of each end surface 35 comprises in the corresponding measurement or' each lateral zone.

will permit even wearing without ridges,

and 'avoid vibration or cluitteringl by passing of edges of ports 24 and channels lVhile the vanes are passing over vthe ports 24, they will be supported by riding upon the edge portions of the walls 25 and ,thus striking of the advancing edges of the' vanes against the bars of the grill work will be obviated, while even wearing ofthe arts is As a vane approaches-t e `dis charge side of the pump and advances over the grill work, it will be thrust inwardl into the rotor and thewater or other liqui previously admitted-to the s ace in the slot 27 will be expressed throng the passages 8l .and discharged through the grill work` When the vanes pass over the grill at the intake side, the vanes are pressed outwardly bythe springs and water or other fluid heilig` pumped will be admitted through the passages-31 permitting their free movement outy ward, as will bereadily understood. What is claimed l .Ina device of the character described, a casing having a cylindrical chamber-therein, a cylindrical rotor concentrically revoluble therein, having .spring-pressed reciprocable vanesithereim said vanes having channels across their outer ends stopping short of the sides of said vanes. having also passages from .the channels through the inner ends of the vanes', an abutment in the chainber, inlet and outlet ports opening on the chamber and ofthe same width as the channels named. the .ratio between the circumferential measurement of the chamber and thc width of the vane Ybeing less than the ratio vbetween the 'linear interior' surface measurement of the cylinder withinthe ends of said ports and the corresponding measurenient of the vane. f

In 'testimony whereof I have aflixed my signature.

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