US2413209A - Rotary device for positive fluid action - Google Patents

Description

Dec. 24, 1946. w BEJEUHR 2,413,209

ROTARY DEVICE FOR POSITIVE FLUID ACTION Filed May 22, 1942 v 2 9 33 INVENTOR. WALTER BEJEuu Patented Dec. 24, 1946 ROTARY DEVICE FOR POSITIVE FLUID ACTION Walter Bejeuhr, Bronx, can Turbotor Corpor corporation of New York N. ation,

Y., assignor to Ameri- New York, N. Y., a

Application May 22, 1942, Serial No. 444,065

1 Claim. 1

This invention concerns a rotary device for positive fluid action, which serves as a pump, compresssor or booster. Or, when a fluid is passed through, the device acts as a motor; or the device is adapted both ways. Rotary devices for positive fluid action are known. But those known devices are intricate, complicated and inefiicient, also because there is an excessive friction of parts upon each other. Nor can they be executed in a hand held size.

These and other disadvantages of the devices of the prior art, as they appear also from the following description and from further comparison, are overcome by the instant invention, which is a continuation in part of that set forth in my United States patent application Serial No. 351,469 filed August 5, 1940, entitled Rotary device for positive fluid action which has issued as Patent 2,327,089 of August 17, 1943.

The objects of the invention are to provide a device of power and capacity in spite of limited size which offers pull in all positions, is adaptable for various pressure heads, utilizes potential as well as kinetic energy of a pressure fluid, drives or may be driven at low speed, and has other characteristics of performance which are generally desirable in pneumatic and hydraulic devices.

The device is to be simple and rugged, consisting substantially of intermeshed rotor and valve parts compactly and snugly accommodated in a portable, hand held housing, and the features of construction, lubrication and packing or sealing arising in connection with gearing converted for the instant purposes are other objects of the instant invention.

Further objects are learned from the following description.

While the invention will be described and shown in the following and in the accompanying drawing in various modifications, such modifications are by necessity only a selection of simple embodiments of the invention, and are therefore to be interpreted as illustrative only, and not as limitations of the invention.

In the drawing:

Fig. 1 shows a half of a housing of an embodiment of this invention, with part of a sectioned valve and rotor and a fully sectioned hose assembled therein.

Fig. 2 is a corresponding end view.

Fig. 3 is a side elevation, partly in section, as seen on the dot-dash line of Fig. 4, identified by an arrow and the numeral 3.

v Fig. 4 is a corresponding partly sectioned top view, the line of section and the direction of the view being pointed out in Fig. 3 by a dot-dash line and an arrow and the numeral 4.

Figs. 5 and 6, respectively, show a central section and an end view which is partly sectioned at a. level indicated at 6 in Fig. 5, of another embodiment of the invention.

Similar numerals refer to similar parts throughout the variou views:

Cap 5! and body 56 of each half of two-partite housing 58 of Figs. 1 and 2 are executed in one, and only one of the halves of the housing is shown, because the other half is substantially the same. For purposes of a seal the two halves should be gasketed where they are in abutment, e. g. upon the rim 6| outwardly closing the cap portion 51, and upon the flange 62 on the opposite side of the device, which has the depressions 53 and 64 forming, in pairs, the intake and outlet port. These abutting portions of the halves of the housing are perforated, so that the halves can be tightly assembled, e. g. by screws 65 extended through such perforations and nuts engaged upon said screws.

When the two halves are assembled the depression 63 in one of the halves forms a port together with the depression 64 in the other half. Such port has a circular entrance, which is provided with a contracted rim 61. That rim will engage, for instance, upon hose 68 inserted therein and the elastic hose may be reinforced bya ring 69 inserted thereinto so that it is pressed into sealing abutment with the circular inner portion of the port. Whereas the depression 64 ends with such a circular portion, the depression 63 is further-depressed therebehind at l 0, so that the fluid is tangentially introduced into (or withdrawn from) the body portion 56. Near its middle the body portion 56 i receded by way of a toroidal annular groove l hwhich has a pitch diameter passing through thecenter of the hub of the valve 60. Notches l2 extend, for instance radially, towards the center of the valve to a diameter which corresponds to that of the curvature of the cross-section of the toroidal annular groove H. There are six notches l2 in valve 60, and every second one of these notches l2, proceeding in a peripheral direction, meshes in rotation with one of the vanes of rotor l3, there being two such vanes I 4 and I5. .Vanes Mand l5 are entwined in double thread fashion, 1. e. the valve 6i] engages rotor l3 at a ratio of 1:3 of the respective rotational speeds. I

In order to avoid excessive friction we may not want to have the valve 60 fit closely, in sliding abutment, into all portions ofjthe valve portion from there to the outside of 51 of the housing. On the other hand it is desirable to keep the outer parts of the valve portion of th housing free of fiuid, if, for purposes of transmitting power or receiving power, the valve 60 is to be connected to the outside by way of a central shaft II, which is not to be encumberedby an elaborate packing arrangement. In that case a threshold maybe struck up in the valve portion of the housing, where such portion adjoins the body portion of the housing, such threshold sealing by a clos fit around the valve 6|! passing thereover. Sucha threshold is indicated at in Fig. 1 by a lining of packing material and sealing around therethrough.

It is difficult to assemble a valve 60 with a rotor l3 if those two parts are interengaging over one extent close to a semi-circle, unless one or the other of these two parts is made flexible. If flexible parts are not desirable, one or the other, preferably the valve may be articulated and assembled from parts whichmay be fitted during assembly to engage one by one in the rotor, such a composite arrangementof the valve also permitting any preferred combination of packing material with structural material, as may be suggested by a person acquainted in this art.

Such a composite valve 69 may be composed, for such purpose, of two similar halves. Thus a split valve is indicated in the drawing. Fig. 1 shows only one half 12 of such a split valve 60. The split extends through in a plane of the axis of the valve, except that it does not extend through the shaft The shaft H, which is preferably integral with such half of a valve, extends endwise only up to the parting plane between the halves of the housing, and extends the housing. These two halves E2 of the valve 60 are then exactly alike. except that a dowel pin 13 is shown to extend from one half 12 shown. That pin engages in a corresponding bore in the shaft ll of the other half in order to procure a concentric alignment.

The rotor I3 rotatably fits the bottom portion 56 of the housing, and may be suitably journalled and sealed in said portion by gasket rings I6 at opposit ends. These rings are shown to have rims l8 which fitcorresponding recesses in the body portion of the housing. Aside from these recesses. and from-the toroidal annular groove the body portion 56 is shown to be cylindrical.

The rotor |.'-i has no ports, and a double flare ll extends clear through rotor l3. This flare may serve, at either end of the rotor l3, to engage upon or to receive an object to be rotated or to be revolved.

One of the ports formed by the recesses 63, 64 serves as an intake for the fluid entering upon the device, the fluid leaving the device by the other port. Let the upper depressions a zone of the'valve 60 moving 63 and 64 serve as a port. which is connected'to a fluid supply.

Through the broadened portion In of the depression 63 of said port the'fluid will rush into theone or two helically disposed grooves between vanes confronting the depression l9 and will fill such groove portions up to the valve 59 on the opposite side of the device. Then the'fluid pressure will start rotating the rotor in the direction indicated by arrow l9, i. e. in a counterclockwise direction seen from th top. Suchrotation continues; the valve 69 rotating in the clockwise direction indicated by arrow 20. The fluid will locally applied to the housing Y the water. v steps 22 and 23, each one of which steps is subdescend through the rotating rotor and will leave the device by the lower port, into which the hose 68 is inserted in Fig. 1.

Whereas in the modification just described in connection with Figs. 1 and 2, the fluid enters as well as leaves the device on one side, a fluid enters upon and leaves the embodiments of Figs. 3 to 6 in the direction of the axis of the rotors.

The housing of the modification of Figs. 3 and 4 is shown exemplarily to have three consecutive steps 2|, 22 and 23. The smallest step 2| serves as a nipple, upon which the hose 24 is engaged, and introduces the driving fluid, e. g. Th rotor 25 occupies the two other stantially cylindrical. However, there is a toroidally flared interconnecting portion 26 between the steps 22 and 23, the pitch circle of this toroidal section extending through the axis of a valve disc 21, which is engaged in single lead worm fashion upon rotor 25. A ball bearing 28 is accommodated in the recess between steps 2| and 22, and another ball bearing 29 is retained upon the free end of the body portion of the housing by a cap 39. Between these two ball bearings 28 and 29 the rotor 25 is journalled and has flared recesses 3| and 32 at opposite ends, the latter recess 32 being provided at its entrance with means, e. g. an Edison thread 33, which removably receives the correspondingly threaded neck of a suitable implement to be driven by the device.

From the recess or countersink 32 extends the port 31 into the spirally dis-posed groov of rotor 25, so that the fluid issues from the motor by way of said recess or countersink 32 out to the open. into an outlet conduit, or into an attached implement. lhere is an intake port 38 upon the rotor. at its other end, through which the fluid enters from the first step 2| of the housing. If this port as is made comparatively large, so that a fluid entering by way of step 2| of the housing strikes substantially unobstructedly and at an obtuse angle upon the upper extent of the top convolution of the vane 48 of the rotor 25, we may make good use of the kinetic energy of fluid entering by way of step 2| of the housing, in addition to a positive conversion of the potential energy thereof, which latter proceeds in the manner explained in connection with the other devices hereinbefore described.

The lobe 39 of the cap accommodating valve 21 is made one with the body of the housing. That lobe 39 extends radially in an axial plane from the two steps 22 and 23 of the housing. and is covered by a closing lid 40. The lid abuts and closes upon the flat surface 42 by way of a rim 44. and is there assembled with and sealed upon the lobe 39 by screws 45. A flange 45. extends angularly fromthe lid 40 and is screwed onto and closes upon an inclined ledge 41 bridging the two steps 22 and 23 of the housing.

In analogy to the arrangement of Fig. 1 the valve is here again shown to pass out from the respective valve portion of the housing by way of a close fitting threshold 49. Adjacent to such threshold 49 there may be provided a clearance 4|, in the lobe 39, as well as in the flange 46 as shown. On the other hand we may also support the marginal faces of the valve, or at least one of them, by a peripheral ledge 50; which offers a counterpoise for any force applied in the channel of the rotor to the opposite side of valve 21. Also in analogy with the showing of Fig. 1-, and

for similar purposes the valve 21 is shown to be split. One half of the valve is integral with the pin 43 seated in lobe 39. Another shaft which is integral with the other half of the valve 21, extends to the outside of the housing by way of a hub 52 forming part of lid 48 and of a stuifing box 53 at the end of said hub 52.

If shaft 5! is actuated upon the outside of the housing, the device will be actuated as a pump. If hose 24 extends into a supply of water, water will be sucked up from such supply and will be forced through the device, to issue, for instance, under rotation through a spray which may be superimposed upon the rotor by being inserted in the Edison thread 33. If the device is not connected to the outside by way of a shaft 5|, but water is supplied under pressure, the rotor will rotate as a motor, and the water will again be dispensed from the lower end of the rotor under rotation.

At the same time the shaft 5| may, however, connect to a device to be driven thereby, and such device will be driven at a quarter of the speed at which the rotor 25 is rotated by the head of water acting thereon.

In the showing of Figs. 5 and 6 the housing of a device of this invention is executed as a straight, flanged pipe insert 75, which may be coupled to a water line by way of hose l6 and hose connections 11 flangedly attached to opposite ends of said insert.

The cylindrical rotor 18 is rotatably retained in the cylindrical bore of the pipe insert between the thrust washers 19. The pipe insert 75 is assembled with a cap 80 accommodating the valve 82 along a split 8| extending in a vertical plane through the shaft 83 of said valve. The shaft 83 is supported upon opposite sides of the valve 82 by ball bearings 84 in the endwise closed hub 85 and in the hub 86, respectively. The latter hub 86 is closed around a stufling gland 81, from which the shaft 83 extends to the outside, for instance in order to drive a rotary implement or in order to be driven. Valve 82 has three wings 88, which are engaged by rivets 9| between a collar 89 and a shoulder 90 forming part of shaft 83. The wings 88 are represented as assemblies of circular discs, e. g. alternating metal and leather discs. Whereas the wings have a free play in the cap portion 80, they pass through a tightly fitting threshold 92 in the wall of the pipe insert 15, when the valve 82 rotates. The valve engages in a single lead groove 93 of the cylindrical rotor 18. Near opposite ends the groove 93 opens by way of port holes 94 into recesses 95, which are centrally located and open outwardly at opposite ends of the cylindrical rotor 78.

Since a device of this kind yields ordmarily most power at higher speeds, the 3:1 reduction 6 18 and valve 82 permits power to be taken from or to be applied to the device at the valve shaft 83 at a reduced speed.

The halves of the rotor extending above and below the level of the axis of shaft 83 are exactly alike, though one is in an upside down position relatively to the other as was the case with the halves of the housing of Figs. 1 and 2, so that the lower port 94 is located slightly in front of the plane of the section of Fig. 5. In other words at the instance of relative position of parts shown in the drawing the two ports 94 are thus separated by two of the wings or discs 88 of valve 82 and between said wings a full convolution of the groove 83 is accommodated. Under such arrangement the fluid can never pass right through the cylindrical rotor, but at least one of the wings of the valve will always be interposed. This and the other embodiments shown in the drawing are therefore positive acting, because intake and outlet are separated for slightly more than one convolution of the single lead groove of a rotor. In case of a double lead groove both grooves should similarly extend for more than one convolution between ports. On the other hand it is useless and even harmful to separate the ports for more than that distance, so that their peripheral and longitudinal spacing in terms of the rotor groove should not exceed a maximum of two convolutions of the groove.

The device is equally adapted for rotation in one or the opposite direction, and it may also equally serve as a pump or as a motor.

Different features of improvement are taught by the different embodiments of the drawing. These features are not exclusive to the respective embodiments, but they may be interchanged and logically features shown in any figure may be introduced or substituted in another embodiment by anybody versed in these arts.

Having thus described my invention in detail, yet I do not wish to be limited thereby, except as the appended claim may require, for it is obvious that various modifications and changes may be made in the form of embodiment of my invention, without departing from the spirit and scope thereof.

What I claim is:

A rotary device for positive fluid action comprising a rotor, having concentric, hollow ends, a drive shaft, and a valve disc mounted on said shaft and engaging in worm fashion over an obtuse angle in an annular groove of said rotor,

between rotor and a housing journalling said rotor between said ends having ports communicating by way of said hollow ends with said groove and enshrouding said rotor and disc as a wall of substantially uniform thickness.

WALTER BEJEUHR.

Images