US1986202A - Rotary pump, compressor, and the like - Google Patents

Description

y M. R. HuTcHlsoN, JR 1,986,202 ROTARY PUMP, COMPRESSOR, AND THE LIKEl Jan. l, 1935.

Filed Jan. 21, 1933 2 Sheets-Sheet l INVENTR /1/1? RHl/rcH/som Jl?.

v oNEY Jan. 1, 1935.

M. R. HuTcHlsoN, JR' 1,986,202 ROTARY PUMP, COMPRESSOR, AND THE LIKE Filed Jan. 2l, 1933 2 Sheets-Sheet 2 7 37 I5 4 JZ 4Z J3 y 35 J3 INVENTOR MR//urc/f/sm, JR

aiented Jan. i, i935 UNITED STATES rATENTvfoi-frics Miller B. Hutchison, Jr., Madison, N. J., assigner to Multicycol Pump & Ena'lne Corporation, New York, N. Y., a corporation of New York Application January 21, 1933, Serial No. 652,861

7 Claims. (Cl. 10S-124) This invention relates to machines and appara.- rockers and the material may be metallic or nontus in the nature of rotary pumps. metallic. Certain composition materials, such Special objects of the invention are to secure for example, as that known in the tradeas "Mia relatively great working displacement per revcca are-desirable, because they are light and E lution in a compact small unit and free of the strong and possess a certain degree of resiliency,

usually attendant high rubbing velocities of roenabling them to closely follow the cam contour tary pumps, compressors and the like. Other deand to accommodate themselves to any slight irsirable objects and the novel features of conregularities there maybeinsuch contour. These struction, combinations and relations ofparts by composition rockers may be accurately molded to l0l which the desired results are attained will apexact size, operate with but slight friction and l0 Fig. 2 is an end elevation of the same. of the cylinder and the end heads of the machine. 20

pear as the specification proceeds. the wear is low.

The drawings accompanying and forming part The rocker seats are provided in the Present of the specication illustrate certain practical disclosureinacylndrieel SnDPert 15,which serves. commercial embodiments of the invention, it be.- in addition, BS the Spacing member between the ing understood that the actual physical structure end heads 16, 17 of the machine, the latter being 15 may vary, all within the intended broad scope of secured by SCreWS 18. in `abutting engagement the claims. -v 'with the shouldered . seats 19, 20, in the ends of the f Fig. 1 is a broken longitudinal sectional view of cylinder. Annuler gaskets are shown provided at the invention embodied in the form of a pump. 21, about these abutting joints between the ends Fig. 3 is a cross-sectional view as on substan- Bearings 22. 23. are Provided in the end bende tially the plane of line 3-3 of Fig. 1. for the shaft extensions 24, 25, of the cam or im- Fig. 4 is an enlarged broken sectional detail of peller. the cam and rocker formation. In the present disclosure, the cam or impeller Fig. 5 is a broken end view showing particuis hollowed outasindicated at 26, to form aninlet 25 larly the supporting cylinder. for the fluid and consequently the shaft extension The desired large working displacement is at- 22 is tubular'in form. The opposite shaft ex.

tained in this invention through the cooperative tension 25 may be SOlid and be equipped with e combination of a series of preferably symmetri- .key 21, or the like, for a driving gear or pulley.

-0 cally grouped hollow rockers 7 and concentrically For the entry of fluid into the tubularl end of 30 related cam or impeller 8. This cam is shown the cam.` the Sln'I'Ollnding bearing 0f the end plete as of generally triangular shape having three 16 is shownas having a tubular screw threaded equi-distant rounded lobes 9, connected by plane extension 28, adapted t0 receive Suitable pipe conllanks l0. nectlons.V

z5 The rockers are shown as of somewhat greater For convenience of mounting and diSnlOnnting. 35

' than semi-cylindrical form disposed in seats 1l, both bearing extensionsfof the end plates" are which are of greater than semi-cylindrical out- Shown in the ferm 0f hubs 29. Which may be 1'0- line, so as to actually retain and support the tatably SUDPOIted as OI' tenllle measuring P111'- rockers. The cavities in the inner exposed faces poses and the like, and which in the case of a i0 of the rockers are shown as curves 12, substanpermanent installation, as here illustrated, may 40 tally concentric with the nose curves of the cam be keyed at 30, in split supporting standards 31, lobes, joining at the ends with convex follower having the cap portions 32, removably secured curves 13, for closely riding the cam faces. The as by bolts 33, -which construction enables quick Y clearance or lack of clearance at 14, between the' mounting or unmounting of the apparatus as a i5 rocker hollows and cam lobes may vary in diiferunit. 'I'he bearing hub at the drive end of the 45 ent designs, depending on the nature of the uid machine may carry a suitable shaft packing, such and the use of the apparatus. For handling oils, as indicated atA 34, with an adjustable gland and particularly furnace oils, in which certain nut 35. 4 amount of impurities may be present, a slight The combined rotary and oscillatorymovements clearance is desirable, such as that indicated in of the cam and rockers are utilizedinthe illustra- 50 the illustration, Fig. 3. tion to accomplish the necessary valving func- 'I'he rockers may be shaped in continuous tions. l

lengths or rods of the cross-section illustrated, Thus the cam is shown as having inletports 36.

produced by casting, molding, rolling or machinextending from the hollow interior out through e5. ingandcut in the proper lengths for individual the leadfaces of the lobes, direction of rotationters 42, located equal distances to opposite sides slots, as indicated in Fig. 1, but it will be realized that for a short form of construction, a single se of slots will suiilce.

For manifolding purposes, the outlet ports 38 and the cylinder are shown as all connected by a surrounding casing shell 39, which may have an outlet, such as indicated at 40, and preferably located at the bottom to serve as a drain and to carry out any dirt in the oil or other uid.

In the detail view, Fig. 4, a preferred design of cam and rocker form is illustrated, wherein it will be seen that therocker center 41, substantially coincides with the point of the cam lobe and that the follower faces 13, are struck from cenof the rocker center on the same diametrical line 43, passing through that center. The nose of the cam is shown as an arc struck from a center 44, and joined with the iianks of the cam by slightly greater arcs struck from thecenter 45. This construction and relation provides a desirable cam contour and smooth-following rocker action. The cam ports 36 are here shown as o'- set substantially parallel with a radial line 46, drawn from the shaft center 47 and the rocker ports 37 are shown as inclined in the same general direction, that is rearwardly, in the direction l opposite to direction of cam movement. I n the position of parts appearing in Fig. 4,`this effects opening of the rocker ports to the outlet ports approximately at or slightly following closure of the cam ports. 1

. The entry of liquid through the center and outward fiow through the cam makes use of centrifugal force and enables the cam to operate as an impeller. This action is further facilitated, because of the continued outward ow through the rocker and cylinder ports to the surrounding manifold. The distribution of ports in both the cam and the rockers, enablesl these being made of ample size and the relative fplacinglof same to effect desired valving and pressure results. The rocker seats of more than semi-cylindrical form brace and confine the rockers full length and enable these being relatively light and with considerable port areas therein.

The impeller cam and the rockers are nished with their ends flush and have ample sealing surfaces i'n engagement with the end walls of the' casing structure and the rockers and cam design maintain constant engagement with the cam face, so that no packing is required for handling fluids, suchas fuel oil, except possibly for the usual shaft packing here illustrated.

While a three lobe cam and four cooperating rockers constitute a desirable combination of these elements, it will be understood that the cam may vary in the number of lobes and that the number of rockers employed may differ/for various sizes of machines. materials handled, pressures developed, volume, speed, special purposes of the machine, etc.

The rocker seats being of greater than Semicylindrical dimensions, provide supports for the rockers extending inwardly as close as possible to the cam and hence afford proper backing for the rockers, preventing them from binding under the thrust of the cam lobes. These seats will hold the rockers in place after removal of the impeller cam and they provide extended bearing surfaces affording ample sealing contact between rockers and seats. Also the greater than semi-cylindrical seats prevent distortion, particularly in the longer lengths of rockers and produce a Better valving operation, where the rockers are utilized as here, to serve also as valves. The convexly rounded tips or ends of the rockers enable vthem to smoothly follow the cam face and to maintain proper seal at all times without undue friction. If desired, the ends of the rockers and impeller may be sea-led by a special end plate having a self-adjusting foating engagement with the same. Other changes and modifications may be made, within the true intent and scope of the following claims.

What is claimed is: Y

1. A machine of the character disclosed, cornprising in combination, cooperatively engaged re1- atively rotatable cam and rocker members, the engaging faces of said rockers having cavities cooperating with the cam face and end seals between the cam amd rocker members to form variable displacement chambers and said cam and rocker members having valve ports for effecting transfer of uid to and from said chambers in the movements of the same.

2. In combination, a hollow rotatable impeller cam having a port therethrough, a plurality of rockers each having a cavital chamber-denng face cooperating with said cam and having a port opening away from said chamber-defining face, end seals between the ends of the rockers "and the sides of the impeller cam completing variable displacement chambers between the cam 'and rockers and whereby Aupon rotation of the cam, transfer of uid may be effected between the cam and rockers.

3. In combination, a support having circular seats with ports therethrough, circular ported rockers operating in said seats and having exposed hollow faces, a ported lobed'member cooperatingQwith the hollow faces ofsaid ported rockers, end seals between the sides of said lobed member and the ends of said hollow rockers completing variable displacement chambersA between said lobed member and rockers and said lobed member being rotatable to effect or enable displacement of fluid to and from said chambers through said lobed mmber and rockers.

4. In combination,.a support having a cylindraceous seat with a port opening therethrough, a cylindraceous rocker journalled for rocking movements in said seat and having a port to register with said seat port in the rocking movements of the same, a rotary lobed member engaging said-rocker, said rocker'having a concave face opposed to the lobed member and said latter member. having a port to register with the concavity of the r'ocker member and end seals between the ends of the rocker and sides of the lobed member completing a variable displacement chamber between the rocker and lobed fmember, whereby upon rotationv of said member, uid can be passed to and from said chamber. 5. In a machine of the character disclosed, the

combination of a generally cylindrical support having longitudinally extending cylindraceous seats, cylindraceous rockers journalled in said seats and having inwardly disposed concave faces, a lobed member journalled to cooperatively engage the concave face portions of said rockers, a chamber surrounding said cylindrical support and having end walls sealing the chambers dened between the rockers and lobed member and porting connections between the rockers and said surrounding chamber for passing fluid from said chambers in rotation of said lobed member.

6. A machine of the character disclosed, comprising a casing having end bearings, a rotatable cam in said casing and having shaft ends journa-lled in said bearings, one of said shaft ends being of tubular form and the cam having a hollow interior in communication with said tubular shaft, saidcam being further ported from said hollow interior through the outer surface of the same, a rocker J'ournalled in the casing and having a concave face portion engaged with the cam face, said rocker having a passage extending therethrough from the concave face of the same and the supporting portion of the casing having apcrt for registry with said passage.

7. A machine of the character disclosed, comprising a. casing having a generally cylindrical wall, a rocker journalled in said/casing and having a hollow face coextensively related to said cylindrical wall, said rocker and casing having companion valve elements to function in the oscillating movements of said rocker and an impeller cam operating in said casing and having a lobe or lobes engaging said cylindrical wall of the casing and both edges of said rocker at opposite sides of said hollow face of the rocker and said casing having end walls sealing the spaces defined between the hollow rocker and cam whereby upon rotation of the cam displacement of fluid may be effected in respect to said chal/13.3,

ber. v 4 di Y MILLER R. HUTCHISON, JR.

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