US1078870A

US1078870A - Device for pumping air or other fluid.

Info

Publication number: US1078870A
Application number: US72098412A
Authority: US
Inventors: Gustaf W Nyquist
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-09-18
Filing date: 1912-09-18
Publication date: 1913-11-18
Anticipated expiration: 1930-11-18

Description

G. W. NYQUIST. DEVICE F05 PUMPING AIR 0R OTHER PLUIE.

APPLECATION NHSB SEPT. lf Mia SHEETf-SHEET l.

G. W. NYQUIST. DEVICE FOR PUMPING AIR 0R OTHER FLUID.

APPLICATION FILED svPT Is, 191x,

1,078,870. Patente@ Nov. 1.1, 1913.

figg. f Ey.

lFig is a sectional view '2. Fig/7 is an end elevation viewed from 4end members :12

pivrran srATns GUSTAF W. N'YQUIST, OF MINNEAPOLIS, MINNESOTA.

DEVGE F911, PUMPING YR kHR OTHER FLUID.

Specification of Letters IPatent.

Patented Nov. 18, 1913.

Application filed September 18, 1912. Serial No: 720,984.

To all whom it may concern: y

Be it fknown that I, GUsrAr W. NYQUIST, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Devices for Pumping Air or other Fluid, of which the following is a specification.

My invention relates to a centrifugal device for pumping air or other fluid.

It is the object of my invention to provide rotating means for drawing in air or other fluid and forcing the same at high pressure therefrom, said means being provided with valve mechanism which shall be effective to absolutely seal the pump from back pressure of the pumped fluid into the air chamber.

It is also an object of my invention to rovide a device of the above type which s all be simple in construction andoperation and peculiarly available for lubrication.

The full objects and advantages of my invention will appear in connection with Vthe vdetailed description thereof and are particularly 4pointed out in the claims.

'In the drawings, illustrating the application of imy invention in one form, Figure 1 is a side elevation with some parts broken away. Fig. 2 is a central longitudinal section. Fig. 3 isa section on line 3-3 of Fig. 2. Fig. 4 is a view similar to Fig. 3 showing the `parts in a diterent position. Fig. 5 is a sectional view on line 5-5 of Fig. 1. on line 6-6 of Fig.

t'he right hand side of Fig. 1.

A casing is provided comprising a central tubular portion 1() having a semitubular offset 11, said tubular portions `being bolted to and 13, respectively, the member 13 having opposite the center of 'tubular portion 10 an enlargement 14 providing a chamber 15 and an upstanding enlarged portion '16 fproviding a passageway -17 :leading from chamber l5. which passageway 17 may be connected wiih a vpipe 18, if desired. The tubular 'portions 10 and :11 are bifurcated centrally and formed with *.ianges, as indicated at 2O and 21 in Figs. 1 `and 2, a centrally bifurcated ning 22 divid- 'ingthe vchamber within portion 11 into two sections 'and having a portion 23 extended within the chamber formed within the tubular portion 10 fpra vpurpose later to be given.

.Journaled within the

end menfibers

12 and 13 and extending through diaphragm -ring 22 centrally with respect to the chamber within portion 11 is a shaft 19 having thereon a rotary Yvalve member 24, which is a `closed cylinder provided with a semicircular cut-out portion 25 at one side, a chamber 26 at the other side being cored out from the body of the cylinder to balance the weight of the same for driving purposes. The valve member 24 is placed at one side only of diaphragm ring 22, as clearly shown in Fig. '2. On the other side of diaphragm 22 'is secured to vshaft 19 a member 27 similar to member 24 excepting that it is provided with an open portion -28 en the opposite side of the shaft 19 from open portion 25. A cylinder .member 29 ^has an open tubular extension 30 journaled in a bearing 31 formed in end wall 12. Said member 29 has securedto the opposite and thereof a shaft 32 to which a pulley driven from Va source of power ymay be at- -tached and the tubular portion 30 is provided with a gear 33 ineshing with the pinion 34 on shaft 19 so that the

members

24 and 27 on shaft L9 and member 29 will be simultaneously driven inopposite directions. In practice,

members

24 and 27 will be of smaller diameter than member 29, and the relation of gears -33 and 34 is such that one rotation of gear 33 will 'produce one rotation of gear 34. The member 32 is provided with a 'pair of

curved partitions

35 and 36 forming two

chambers

37 and 38, respectively, chamber 37 `being terminated at a point about midway 'of member 29 by an end wall 39, while chamber 38 extends clear through -to the `endet' member 29 being terminated by a partition or end wall 40. Both

chambers

37 and 38 open indirectly into the chamber 15, as clearly shown in Fig. 2. The space without'the partition walls-35 and 36

forms chambers

37 and 38 but within cylinder member 29 comprises

chambers

41 and 42 each opening into a common portion 43 which in turn has communication with the opening 44 Within bearing extension' 30 through which communica-tion with the out-- side atmosphere is had by

chambers

41 and 42.

The member29, .as above stated, is cylindrical and seats within the circular opening in the diaphragm i the wall 10 a distance equal to the rinner I projection 23 of diaphragm ring 22. Adjacent one junction of partition wall 35 with L the wall of member 29 yis a port 45 extending i through wall 29 .and into chamber 37. A

ring 22 being spaced from similar port 46 extends through wall of member 29 into chamber 41, and between the ports 45 and 46 extends from member 29 a wing 47 of a height sufficient to just engage lthe interior of the chamber formed by tubular member 10. At the outside of port 45 is a short partition wall 48 extending obliquely toward wing 47, a similar partition wall 49 extending from outside of port 46 toward wing 47, each of

walls

48 and 49 being inwardly curved and terminating short of wing 47 so as to leave a passageway between said wing and the edges of the

short walls

48 and 49. As shown on Sheet l and also as indicated in dotted lines at 50 in Fig. 5, at the ends ofthe wing member 47 and

short partitions

48 and 49 are terminating

walls

51 and 52. lt will be seen, there'- fore, that as wing member 47 moves about and Within the annular space 53 between tubular member 10 and member 29, it separates said space into two portions one of which communicates through port 46,

spaces n

41 and 43 and opening 44, with the atmos- 25 phere for intake, and the other of which communicates through port 45, passageway 37, chamber 15 and passageway 17, with the outow'pipe 18. As shown in Fig. 6, the ends of passageways or

chambers

41 and 42 adjacent chamber 15 are closed by end walls 54 and 55 so that there can be communication between

chambers

37 and 41 only indirectly through ports 45 and 46 and annular space 53. A wing member 56, having

end walls

57 and 58 and associated ports and short curved partitions similar to ports 45 and 46 and

partitions

48 and 49, is provided in relation to chamber 38 which is in all respects similar to the wing member47 and associated parts for chamber 37 except that wing member 56 and its relatedparts are positioned on the opposite' side of member 29 and so as to operate at the other side of diaphragm ring 22. Wing member 47 cooperates with the cut-out portion 25 of rotary valve member 24 While wing member,

56 coperates with the similar portion 28 of valve member 27. The operation of my pump will be apparent from the description thereof. As mem-I ber 29 is rotated

wing members

47 and 56 travel within the annular spaces 53 at cath side of diaphragm 22. The

valve members

24 and 27 seal up the annular passageways 53 in front of and behind the

wing members

47 and 56. vAir or fluid in front of lsuch Wing members therefore is forced over the lips 48 through ports 45 into

chambers

37 and 38 and frm said chambers into chamber 15l and through passageway 17 out of pipe 18. At the same time air or fluid will flow in throughintake opening 44, chamber 43, passages 4l and 42 through portsv 46 into the annular passageways 53 behind

wings

47 and 56. As above stated, the

members

24 and 29 are rotated at the same speed so that

wing members

47 and 48 will in turn be brought within the openings 2 5 and 28, respectively, to vary the relation of the charge of' air in the annular passageways 53 at the end of each revolution of Wing members 47. The short curved lips or

partitions

48 and 49 enter the

openings

25 and 28 in such manner as effectually to seal communication between the high pressure area within

passages

37 and 38 and the air pressure area with

passages

41 and 42 while this change is taking place, one or the other of

lips

48 and 49 always being in engagement with an edge of the walls forming the

openings

25 or 28. The member 24'runs in close contact with the inner wall of tubular portion 11 and also in Contact with the wall of tubular vmember 29. Itv is desirable, not only for the purpose of efectingsmooth running of the parts and little friction, but also to more` effectively seal the parts against leakage, that the

members

24 and 27 should be lubricated. lThis can readily be effected by applying a grease cup 59, as indicated in Fig. 5, by

means of which hard loil or other lubricant may be forced inupon the surfaces of

members

24 and 27.

The advantages of my improved pump will be apparent. Not only can high pressure be obtained or very rapid How of fluid, but by reason of the double character of the pump mechanism a high rate of speed may be maintained at a relatively low ratev of power. Moreover, the device is peculiarly compact so that a very large pumping efficiency is obtainable from a machine of comparatively small size.

I claim:

1. A centrifugal pump comprising a casing formed with a central cylindrical chamber, a hollow cylinder of less diameter than said chamber rotatably mounted therein, one of the bearings of said cylinder comprising a tubular member in communication with the outer atmosphere, said casing also providing an outlet chamber at the other end of and of substantially the same diameter as the hollow cylinder, a. system of partitions dividing the hollow cylinder'into two pairs of oppositely positioned passages, one of said pairs of passages having direct communication with the inlet opening only and the other pair of paages having direct communication with the outlet chamber only, a partition about the hollow cylinder dividing the annular space between the walls of the same and the casing into two separated compartments, openings being provlded from one of each of said pairs of passages into each of said compartments, said sets of openings being at opposite ends and sides of the hollow cylinder, and locking wings on the cylinder between said respective pairs of openings.

2. A centrifugal pump comprising a cas ing formed with a central cylindrical chamber, a hollow'cylinder of less diameter than said chamber rotatably mounted therein, an inlet opening to the hollow cylinder at one end thereof, said casing also providing an outlet chamber at the other end of and of substantially the same diameter as the hollow cylinder, a system of partitions dividing the holllow cylinder into two pairs of oppositely positioned passages, one of said pairs of passages having direct communication with the inlet opening only and the other pair of passages having direct communication with the outlet chamber only, a partition about the hollow cylinder dividing the annular space between the walls of the same and the casing into two separated compartments, openings .being provided from one of each of said pairs of passages into each of said compartments, said sets of openings being at opposite ends and sides of the hollow cylinder, and locking wings on the cylinder between said respective pairs of openings.

3. A centrifugal pump comprising a tubular chamber, a rotary member within said chamber having the walls thereof `spaced from the walls of thechamber and being provided vvith separated intake and outflow passages having ports Communicating V'with the space between the rotating member and the chamber, a centrifugai mmbei of less'diameter than the first named rotary. member having a portion thereof extending into the aforesaid space and engagin with its periphery the periphery of the `rst named r0- tating member, means for rotating theA two members at uniform speeds, a wing device on the first named rotating member located between the openings into the passages therein and extending outwardly into engagement with the inner wall of the chamber, said second rotating member having a semi-circular cavity for receiving and permitting the passage of the wing member, and a pair of short curved lips extending from the outside of said openings toward the outer edge of said wing member for entering said cavity before and after the passage of the wing member and engaging lthe outer edges only of said cavity.

In testimony whereof I aflix my signature in presence of two witnesses.

GUSTAF W. NYQUIST. Witnesses:

F. A. WHITELEY, H. A. 'BowMArL