US819674A - Rotary pump, compressor, motor, engine, and like machinery. - Google Patents

Description

No. 814x674 P. J. ROOHOW.-

PATENTBO-MAY 1,; i906.

ROTARY PUMP, COMPRESSOR, MOTOR, ENGINE, AND LIKE MAOHINR.

` APPLICATION FILED OGT.12,'190 3.

No. 819,O74. PATBNTED MAY 1, 1906. P. J. ROOHOW. l ROTARY PUMP, COMPRESSOR, MOTOR, BNOINOAND LIKE MACHINERY.

APPLICATION FILED 0CT.12, 1903.

2 SHBETS*SHBET 2.

` STATES enfrnur ,or-leienA ssnnnnisn J. nocnoiv, or BROOKLYN, NEW Your.

no. eisers.

Specification of Letters Patent.

rammed my 1, 190e.

application fina cacher i2, 190s. vemu Mimes?.

To @it wiz/om it muy; conocen:

Be it known that l, .Fnsnnmsn JBocHo'W, .of Brooklyn, New York, have invented cer-- tain linpicveinfuits in Rotary Funips, Cornpressors, Motors, Engines, and Like Ma,- chinery, et 'which the 'following description, in connection With the. accompanying dre??? ings, is spe "ic-ation, lilre numerals on. the dvin i desir.,A ting-like ports.

This invention rel -ites to pumps or Lilie devices pori..culn1ly applicable to the compression or pumping air, dro., although l contemplate the embodiment ot niy improveinents in motors, engines, and like machinery Whatever the character in any iield Whe-re the i nature of luy improvements render them of value.

lily ii'lvention relates more specifically vto the type of .machine illustrated in the rotcry pump forming the subject of United States Letters Patent No. 33,961, granted to ine src , contempla upon the .17th day oi December, 1861, and which has Ylor niany years been a standard forni ol pump, simple and eflicient in operar tion at lonY pressures, but lacking elliclency at high pressures by reason of a certain amount or' leakage which is diiiicultto avoid in a singleindcr punip of this kind. l the compounding of several units of this type ol' pump, and the accomplishment oi this feature vforms the subject of the following speciiication, with drawings, ere the various features oi' inv invention f' d i illustrated .fully and i ine e; nis.

in ,.itwings, Figure l is a view in plan ol a compound rpt/ary punip in the construeg ...,i my improvements have been Fig. 2 View in longitudinal .su Fig. 3 isa view in trsnsverse vertical section on the vertical longitudinal section of the shaft, and Fig. o a transverse section thereof.

ln the embodiment of my invention selected for description end illustration as a con venient form ro enable readyI and complete under-s tending oi iny improvements the part de ated by the reference-numeral l, is a f using constructed substantially in ec- 1 ce with .my i. rs Patent to which reierence been made above and in Which operate p 3, ac ted b f a shaft 4.-, ein ni t to receivetlie bla es, a slot in t i .ierinitting passage ot' the leg 7 of the piston 3. The construction of these pistons and the shaft may he, varied, as found suitable and convenient, and as 'one form of construction the blades may be divided into two parts, as indicatedv at 8 upon `the blade 2, one partv having a Arecess 9 (see Fig. 2) in which lies a spring `10 a similar provision being made at 11 inthe piston 3 to hold the pistons out against the cylinders.

The fluid to be pumped may be introduced to the casing at 13, passing into the chamber 14, in'which it is acted upon by the pstns in usuel manner and carried around to the outlet 15, whence in accordance with my invention a connection 16, preferably formed as channel 17 in the casing, leeds to a sirnilfig connection 26 upon the adjacent casing 21', the channel 17 in this connection leading to the inlet-port 25 of the cylinder 21.

The shaft portion 24 may be in' continuation of' and integral with the shaft 4, and additional casing or pump units may be connected up, as that illustrated at A31, with blades 32 33, similar to those already described, and provided with connections 36 39, and the shaft muy be driven from any suitable source of power. (Not shown.)

ln operation, connection having been made with a suitable source of supply of fluid, the latter be drawn in at the inlet 13 of the casing 1 and underthe action of the pistons therein in the direction of the arrow will be delivered to the casing 21 at a pressure of, say, twenty-live pounds to he acted upon by the pistons 22 23 in turn and delivered at an increased total pressure of, say, fifty unds to the casing 31, Where the pressure will be still further increased.. In accordance with my invention the ports and the connections between them are so arranged that the fluid will pass from one casing to another snd be acted upon within the casings with the least possible deflection from its natural course, eliminating friction and resistance due `to counter currents-a feature of primary importance dynamically.

By. locating 'the orts in the periphery of thel casings I enab e a Wider range of form and size of the ports, as Well as promoting the easy flow of the Huid above mentioned.

' The casings Wili preferably be formed separately for ease of construction and open at one end, res ectively, to permit ready introduction of t e movlng parts, and they may be provided, as illustrated, with flange-endbolt connections 40 41;. f

In assembling the parts when constructed as illustrated the parts comprising the iston- blades 2 and 3 for the cylinder 1 are rst placed in the cross-slots 42 (see Fig. 5) of the shaft 4 between the partition 43 and the shaft end 44, after which filling or distance pieces 45 are placed in the slots 42, as best shown in Fig. 6, where one of the pieces is partly in place in the slot at the bottoni of the figure, two of these pieces being fully insorted in the side slots. Grooves 46 are formed in the periphery of the shaft and distance-pieces to receive packing-rings 48, which will be put in place before introductior` ofthe shaft to the casing, and when the x shaft', with blades 2 3, has been thrust home until the distance-pieces lie in the circular aperture between the casing land the casing 21 the blades 22 23 may be (put in position in` the slots 42, being separate from the blades 2 3 by the distance-pleces 45, and similar distance-pieces 49 will be used vbeyond the vblades 22 23 and the casing 21 slipped over them against the flange of the casing 1 and there bolted in place. The casing 31 will be added in similar fashion and succeeding casin s, if any, the last casing referably having a hearing 51 for the end o the shaft, afriction metal bushing 52 being provided, if found necessary, and an oil-cup 53. A cylinder-head is shown at 5.4, held in place by bolts 55, and through the central a erture 56 in this head extends the shaft en which may be tapered at 57 to coperate with taper 58 in the bore of a bushing' 59, screwed into the cylinder-head and adjustable therein to take up wear, a split lockinut'GO being provided, preferably. At the outer end of this bushing may be provided a stuHing-box gland 61, formed with a feather 62 and having a retaining cap or nut 63. It is desirable that the ends of the piston-blades 32 33 at the opposite end of the shaft shall abut snugly against i the outer end' of the casing 31 to prevent leakage, and this may be accomplished conveniently-by a spring 64 between the cylin- A der-head 54 and the end of the enlarged medial portion of the shaft, a loose Washer 65 y being in tei' osed between the shaft end and compressed in the still smaller casing 131.`

spring, if ound desirable, and preferably kept from rotating by a suitable device, as the feather 66, said spring ermitting also a slight play between vthe sliaft and pistons upon expansion or contraction of the former within the latter.

Passing to the modification illustrated in Fig. 4, it Will be noticed that the casings 101, 121, and y131, respectively, differ in size, so that a fluid, such as air, introduced to the largest, 101, will be subject to compression when acted upon b y the piston devices in the smaller casing 121 and will be still further This latter type of compressormay be operated as a'compound steam-engine by introthe casing the casing the steam d'ucing steam at high pressure to 131 and exhausting from it into 121 and 101 in turn, which utilize at respectively lower. pressures.

The operation of the device illustrated above will be` understood clearly from the.

above description, and it will be obvious that anyleakage which was objectionable in `a single-casing machine of the above type is talren care of in the compound casings, and' when my improvements are applied to steamengines the leakage is utilized in the lowerpressure casing to perform work, ava-iling to the full of the natural efficiency of this type of. rotary a paratus.

It is preferred to arrange the adjacent cas ings 'with their eccentricities at one hundred and eighty degrees to enable the port connections from outlet to inlet to be made as short as possible; but it will be understood that I do not limit myself to the exact construction illustrated and described above nor in general otherwise than asset forth in the claims read in connection with .this specification.

What I claim, and desire to secure by ters Patent, is-

1. Rotary apparatus of the class described i of directly-abutting aving peripheral inlet uralit textended cent cylin4 eig; and rotatab e separating vices intermediate 'said cylinders., substantially as described'.

3. Rotary apparatus of the class described comprising a, luralit open-ended cy inders aving'penpheral inlet and outlet ports and integral channels ex and pro- IOO Orts, and peripheral chanl IIO tension of said ports, said cylinders beindiposed eccentrically with respect to a sha tatable within said cylinders, adjacent cylin:

ders being arranged at angles of one hundred A and eighty degrees to bring the mouth ofthe channel from the inlet-port of 011e .Cylinder opposite the mouth of t e channel from the outlet-portici the neighboring cylinder; and rotatable separating devices lntermediate said cylinders.

4. Rotary apparatus ofthe class described comprising a plurality of communicating open-ended cylinders, 'a shaft rotatable in said cylinders respectively and slotted for the reception of piston plates or devices to oper- 'ate in each lcylinder and divisionmediate said plates and rotatab -ing said s aft and ivision-pieces between said cylinders, to prevent leakage therebetween.

6. A shaft for compound rotary apparatus having a plurality of cylinders, consisting of a cylindrical casting having a central axial bore divided by a plurality of transverse Webs into a series of axial chambers, and a plurality of` longitudinal slots intersecting the central 4chambers intermediate said webs to form transverse bearin -slots for piston devices, to operate in said cy inders. 4

7. A shaft for compound rotary apparatus having a plurality of cylinders, consisting of a cylindrical castin having a plurality of transverse Webs, an a lurality of `longitudinal slots intersectin t e central chambers intermediate said we s to formtransve'rse bearing-slots for piston devices, to operatein said cylinders, with division-pieces in said slots to separate said piston devices and maintain the same in position relatively to each other in their respective cylinders.

S. Rotary apparatus com rising a series of abutting cylinders, a rotata le shaft therein carrying piston-blades for each cylinder and means to permit expansion and contraction of said shaft without binding of said pistons. 9. Rotary apparatus of the class described comprising a luralitygof c"\,\".inders\; a piston device for sai cylinders respectively; a shaft recessed to receiveaai piston devices; and a spring acting upon one end of said series oi iston devices to maintain said piston device arthest therefrom in constant contact with the adjacent headof its cylinder, substantially as described.

10. Rotary apparatus of the class described, comprising a series of cylinders having at each end bearings to receive a shaft, one

bearings being adjustable and having bore; a shaft in said bearings, having a peripheral taper to coperate with said tapered bearing; piston devices capable of slight axial motion relative to said shaft; and a spring acting upon one end of said series of pistons to maintain the same constantly in pro er position regardless of the position of sai shaft, substantially as described.

11. Rotary apparatus of the class described comprising a series of open-ended cylinders having respectively an eccentric opening at one end acircular opening at the other end, said cylinders being formed separately and arranged to be fitted together; and means to secure said cylinders in assembled relation.

Signed yat New York, York and State of New October, A. D. 1903.

" FERDINAND J. ROCHOW.

Witnesses: y

ALEXANDER C. PRoUDFIr, HENRY B. PoGsoN.

of said a tapered in the county of New York, this 3d day of

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