US1936467A - Rotary pump - Google Patents

Description

NOV. 21, 1933- J DEUBEL 1,936,467

ROTARY PUMP Filed April l 1932 3 Sheets-Sheet l Jose h Deubel,

BY HIsATTW,

INVENTOR J. DEUBQEL.

Nov. 21, 1933.

ROTARY PUMP Filed April l, 1932 3 Sheets-Sheet 2.

- Nov. 21, 1933.

J. DEUBEL ROTARY PUMP Filed April 1, 1932 5' Sheets-Sheet INVEN R,

Josaph ,Deu

' BY H m ATTORNEY,

Patented Nov. 21, 1933 UNITED STATES PATENT OFFICE ROTARY PUMP Application April 1, 1932. Serial No. 602,440

2 Claims.

This invention relates to rotary fluid engines, by which I mean to include motors as well as pumps, although the invention is herein explained with reference to operation of the apparatus as a pump. I aim to produce a pump of this type which shall have great efiiciency and at the same time be quite simple in construction.

Inthe best form of the invention the fixed structure is formed with alined annular enclosed spaces having a part of said structure separating, and such part formed with a pair of ways connecting, them and arranged in different radii from the axis of and each open to each space, said structure having an intake communicating with one side of one way and the corresponding side of the other way and said structure also having an outlet communicating with the other sides of said ways, and in the respective ways are valves movable back and forth each so as to project into one space and withdraw from the other, and vice versa, and each having ports adjoining said sides of the corresponding way to connect the space into which the valve projects with, and formed thereupon to close off the other space from, said intake and outlet, and there is means to reciprocate the valves comprising a rotor journaled in said structure and fitting said spaces and having in the latter camlobes projecting to said part and oflset rotatively with respect to each other.

In the drawings,

Fig. 1 is a view showing the pump in horizontal section in a plane slightly above the axis of its rotor, certain parts appearing in section;

Fig. 2 is a section on line 2-2, Fig. 1, with the right-hand casing head and cam removed;

Fig. 3 is a section on line 33, Fig. 1;

Fig. 4 is a section of the casing on line 44, Fig. 1, the valve-casing appearing in dotted outline;

Fig. 5 is a section on line 55, Fig. 1;

Fig. 6 is a perspective view of the valve-casing; and

Fig. 7 is an inside view of one of the valves.

The shell or casing 1 is cylindrical and has two opposite nozzles 2 and 2a each of which communicates with the cylindrical interior of the casing via an upper large or main port 3 (3a) and with such interior, but at a point at the opposite side thereof (below the port 3 or 3a of the other nozzle) via a narrow auxiliary port 4 (4a), these latter being side by side and formed in the casing structure below its said interior.

In the casing 1 is the valve-casing 5 (Fig. 6). It is here a one-piece structure comprising two opposite segments 6, located as component parts of a cylindrical block which closely fits the casing l, and two opposite axially located tubular projections 7, each segment having passages 8 connecting its cylindrical surface with its radial surfaces. This valve-casing may be secured against rotation in casing 1 by fins 9 engaged in grooves formed in them. The two upper passages 8 communicate with the passages 3 and 3a; the two lower ports 8 communicate, respectively with those (intake) ends of ports 4 and 4a which open into the interior of the casing 1. The position of the valve-casing in the casing 1 is such that the web 6a between the passages 8 of each segment prevents flow within the interior of the casing between each port 3 and 3a and the end of the port 4 (4a) which is beneath the same.

In each way or recess 51:. between the segments of the valve-casing 5 is a slide valve 10 having two opposite longitudinal ports 10a which respectively communicate permanently with the adjoining two passages 8 of the valve-casing and are so much longer than the segments of the valvecasing are wide that in the mid-position of the valve they communicate also with the two annular spaces In of casing l flanking said segments and formed around the projections 7 and when the valve is at either limit of its motion one such communication is open and the other closed (see Fig. 1). The valve is preferably in two counterpart sections (Fig. '7) longitudinally urged apart by a spring 11 for a purpose to appear.

The rotor, which causes shifting of these valves in relatively opposite directions, each back and forth on each cycle of the rotor, comprises a shaft 12; a pair of counterpart barrel cams 13 keyed on the shaft and recessed to receive the projections '7 and each having its inner face formed with a single rise or lobe and a single fall or recess (the rise of each cam being diametrically Opposite the rise of the other); and nuts 14 screwed on the shaft outward of the cams. There are ball-bearings 15 for the shaft, these being arranged in hollow projections of the removable heads 16 forming parts, and secured to the already described main part, of the casing l. The valves 10 reach from one cam to the other, and they are formed in sections held apart by the spring 11 so as to take up any wear that may occur in them or the cams.

It may be remarked that the ports 3, 3a (of equal width) are in the same zone; also that ports 4, 4a (of about one-half the width of ports 3, 3a) are also in that zone, side by side.

The fluid flow may be in either direction through the pump according to the direction of rotation of the rotor; if the latter direction'is according to the arrow A in Figs. 3 and 4 the flow will be in the direction of arrow B.

Operation.Assume the rotor to be in the position shown in Fig. 1 and to rotate according to arrow A.

, Fluid in nozzle 2 will enter port 3 and the near port 10a of the upper valve and as this valve becomes now projected, by the action of the cams, from the right of the valve-casing the fluid will, by the suction behind the lobe of the right-hand cam, escape into the space 1a and follow said lobe around, whereupon, the upper valve being moved to the left and the lower valve projected, by the action of the cams, from the right of the valve-casing, the fluid will enter that port 10a of the lower valve which is directly under the mentioned port of the upper valve and pass therethrough into the port 4a, through which it will next be forced into nozzle 211 when the lower valve is next moved to the left. When the upper valve is projected from the left of the valve-casing a series of steps is initiated which is identical to that already described, with the left-hand space 1a being brought into play. Thus, a fluid charge from nozzle 2 to nozzle 2a, via the port 4a is delivered twice for every revolution of the rotor, the urge through 4a being the result of pressure behind the fluid, to wit, by the lower valve as it moves to deliver the charge it has received from one or the other space 1a.

Further, when the lower valve is projected one way or the other from the valve casing and as the retreating lobe of the corresponding cam creates suction behind it and hence on that port 10a of the lower valve which is nearer the observer in Fig. 1, such suction acts through port 4 to draw fiuid from the nozzle 2, and when this valve is shifted back and the upper valve projected the port of the latter valve nearer the observer in Fig. 1 receives such fluid and when said upper valve is shifted back the fluid is delivered at 3a into nozzle 2a. Here again, two fluid charges are delivered from nozzle 2 to nozzle 2a, in this case through port 4 by suction.

Thus in every cycle four distinct charges pass through the pump, two by pressure in port 40. and two by suction in port 4.

So far as I am aware, given fixed structure (casing 1 and the valve-casing) formed with an annular enclosed space, as 1a, lateral of which is a part, as 6-6, having a pair of ways 5a extending lengthwise of and, arranged in different radii from the axis of said space and opening thereinto and each communicating with the exterior of the pump casing (as one via 3-8 and the other via 84a, or one via 3a8 and the other via 8-4) and being otherwise closed, it is new to provide valves movable back and forth in the respective ways each so as alternately to project into and withdraw from said space and having a port to connect the latter with the atmosphere when the valve is so projected, said valve closing off communication between said space and the atmosphere when the valve is so withdrawn, and means to reciprocate the valves so that in alternation they are projected into said space comprising a rotor journaled in said structure and fitting said space and having a camlobe projecting to said part. In the example, said part separates and its ways connect two such spaces; each valve is projected into said spaces in alternation and so that when its port opens communication between one space and the atmosphere the valve closes communication between the other space and the atmosphere; and the rotor has a cam-lobe in each space projecting to said part and the cam-lobes are offset rotatively with respect to each other. This provides for the delivery of two of the charges. Where, in further reference to the example, four charges are delivered and regarding the passage of one nozzle 2 (or 2a) and the corresponding port 4a (or 4) as the intake and the passage of the other nozzle and corresponding port as the outlet, the inlet communicates with one side of one way and the corresponding side of the other way and the outlet communicates with the other two sides of said ways (the term corresponding as here used meaning facing in the same rotative direction).

Having thus fully described my invention what I claim is:

1. In combination, fixed structure formed with 110 alined annular enclosed spaces having a part of said structure separating, and such part formed with a pair of ways connecting, said spaces, and arranged in different radii from the axis of and each such way open to each space, said struc- 115 ture having an intake communicating with one side of one way and the corresponding side of the other way and said structure also having an outlet communicating with the other sides of said ways, valves movable back and forth in the re- 120 spective ways each so as to project into one space and withdraw from the other, and vice versa, and each valve having ports adjoining said sides of the corresponding way to connect the space into which the valve projects with, and formed thereupon to close off the other space from, said intake and outlet and means to reciprocate the valves comprising a rotor journaled in said structure and fitting said spaces and having in the latter cam-lobes projecting to said 13C part and offset rotatively with respect to each other.

2. The combination, with fixed structure comprising, a cylinder having closed ends and in its cylindrical wall main ports angularly offset from each other and connecting its interior with the atmosphere and having also two side-by-side auxiliary ports formed in said wall and extending past each other and having discharge ends communicating with the respective main ports and intake ends communicating with the interior of the cylinder both in the same arcuate portion of the latter between said main ports, a fixed valve-casing in and forming a space with one end of the cylinder'and comprising two reversely disposed segments respectively separating the main ports from the adjoining intake ends of the auxiliary ports and forming between themselves opposed ways open endwise to said space, said valve-casing having passages leading 150 munication between the corresponding passages and said space when such valve is withdrawn, and means to reciprocate the valves so that in alternation they are projected into said space comprising a rotor joumaled in said structure and fitting said space and having a cam-lobe projecting to said valve-casing.

JOSEPH DEUBEL.

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