US1559323A

US1559323A - Duplex rotary pump

Info

Publication number: US1559323A
Application number: US742526A
Authority: US
Inventors: Jackson John
Original assignee: AMF Inc
Current assignee: AMF Inc
Priority date: 1924-10-09
Filing date: 1924-10-09
Publication date: 1925-10-27
Anticipated expiration: 1942-10-27

Description

oct. 27,1925. 1,559,323

J. JACKSCN DUPLEX ROTARY PUMP (Filed oct. 9. 1924 v /3 42582/ /f/ 2 4 l 1| u u INVENTOR ATTORNEY Patented Oct. 27, 1925.

y A1,559,323 PATENT OFFICE.

.'roHN JACKSON, 'or BROOKLYNNEW. YORKgAssieNon To AiviniarcANY MACHINE &`

FOUNDRY COMPANY, `A CORPORATION or NEW JERSEH f DPLEX ROTA-RY PUMP.

Application andl october a, Y1924.. serial No. 742,526.k

To all whomA t may con-cern.'

Be it known that I, JOHN JACKSON, a sub ject of the King of England, residing atv Brooklyn, county of Kings, and'State of New York, have invented a new and useful Improvement in Duplex Rotary Pumps, of which the following is a'specilication.

This invention relates to aduplex rotary pump of the high speed typeA ad'aptedto be driven by direct connection with an electric motor, 4although it may be otherwisesdriven if desired. tion is the production of a pump 'of this type, in which the 'rotating parts areperfectly balanced, and lin which wear is reduced to a minimum, both features contrib.- uting tohigh eiiiciency. A furtherobject of the invention isthe-production of a pump of this kind, the rot-ating parts of which may be run in either direction. Vith these and other objects not specifically mentioned in view, the invention consists of, certain constriictions and combinations which will vbe hereinafter fully described and then speciiically set forth in the claims hereunto 'appended. I

`In the Yaccompanying drawings, which form -a part 'of this specification and in which like characters of reference indicate the same or like parts, Fig. l'is a central sectional elevation ofavpump constructedv in' accordance with the invention; Fig. 2 is across-sectional View of the -pumpr shown inv Fig. l; and Fig. 3 is adiagrammaticview showingthe development of the inlet and outlet ports and the rotor of the pumpy shown in Figs. 1 and 2.v I y In carrying the'invention finto' effect, there is provided a cylinder having inlet and outlet ports, means for dividing the'interior of said cylinder into a plurality of annular chambers, axially movable -means -for segregating the ports to prevent leakage from lan inlet port to an outletportor vice versa-Fl atv any point in the operation-of the device, a rotor operative in said chambers lin peripheralcontact with the inner perimeter of the cylinder and lhaving helical V.faces engaging and operating said segregating means, and means for operating the rotor. All of the above mentioned rparts and means may be widely varied in construction within the lscope of the claims, for the particular` device selected to illustrate the inventionpis but one of many possible concrete embodi- The main object of the invenments Aofthe same. .The invention therefore is not tobe restricted to the precise detailsl of the structure shown and described.

Referring to the drawings, 4 indicates a cylinder boredin a casting 5 andp-rovided with heads 6 and7 bolted to lthe cylinder proper. Each of the: heads supports aV bearterior of the cylinder 4 into a plurality of annular chambers y12,.there being three of these chambers in the pump' illustrated. As shown, this dividing means consists of two annularA members 1B stationarily held in the cylinder by means of bolts 14 threaded in the cylinder walls and engaging suitable pertures in the peripheries of said inemers.

The cylinder 4 is provided with a series of inletports 1.5 and with a series of outlet ports 16, these ports beingfcut through the cylinder wall at its bottom.

For the purpose of preventing leakage of pumped fluid from one set of ports to the other at any time, therev is provided axially movable means for segregating said ports;

andas shown, this means includes two vanesbetween the inlet port 15 and the outlet port 16. 'These vanes are so mounted that they may have an axial sliding movement always in contact with the inner perimeter ofthe cylinder, but they have no rotating move! mentt f rllhere isfurther provideda rotor which, as shown, is lmade up of parts rotatable in the chambers 12 in peripheral contact with the inner perimeter of the cylinder 4,`and' these parts are collectively in perfect balance. As shown, the rotor Vis made up of three

parts

18,19 and 20, the part 18 having oppositely disposed helical faces' 21, and theV parts 19 and 20 eachhaving one helical face 21. mounted on the drive shaft 11 before referred to, and are keyed thereto by means of va long key 2.2, Spacers 23 surround the The

rotor parts

18, 19 and 20 are all K shaft 11 ,between the rotor parts,-and these spacers also are keyed to the shaft 11 by means of the long key 22. The parts of the rotor are .held together by means of a series of four bolts 2l, each having a nut 25 at each of its ends. The helical faces 21 of the

rotor parts

18, 19 and 20 engage the ends, of the vanes 17, and as the rotor turns, the vanes are moved axially in the slots of the stationary members 13 to always segregate the inlet and outlet .port-s and force the pumped fluid drawn from the inlet ports into the chambers 12 out thi-'ough the outlet ports. Byan inspection of Fig. 3, it will be seen that the movements 'of the vanes are always in opposite directions, so that even these light parts operate in perfect balance. The middle part 18 of the rotor serves to divide the middle chamber 12 into two parts, so that although the dividing members 13 divide the cylinder into three chambers, there are really four chambers because the middle one is divided into two parts by the middle part of the rotor, and as a result oi this construction, the end-thrust in both directions is perfect balance and no undue wear 'of the stationary and movable parts will occur.

Means are provided for drainingthe cylinder of any tliuid which may leal: past the rotor, and as shown, the drainage is into one ot the inlet ports-15 and is ellected by means of a main pipe 26 connecting one end of the cylinder with one of the inlet ports 15, and by a branch pipe 27 connecting the opposite end ofthe cylinder with. the pipe 26. This pipe arrangement is reversible so that it the pump is to be loperated in the opposite direction, the inlet ports 151y would become outlet ports; 4the outlet ports 136. would become inlet ports; and the pipe 26 would be connected with one of the ports now numbered 16, which would then be an inlet port.

' Each of the inlet and outlet ports is so located that one off the rotor parts completely closes it when its periphery at its widest part passes over it. Thus, in Fig. 3, the inlet and outlet ports controlled by the `rotor parts 19 and 2O are both closed; while the inlet ports 15 and outlet ports 1G con-- trolled by the rotor part 18 are both open; so that when thefparts are-in. theposilion shownin this. ligure, the chamber in which the :rotor parts 19;` and 2O move are completely outolt operation, lolut the cha-nibe-rs controlled by the rotor part y18 are in full operation. .lt will be understood that as the rotor turns from the'4 position shown in Fig. 3 and the middle ports begin toY close, the outer ports will begin to open.l Ars; a result of this construction, there is always a substantially constant `open port area and consequently a substantially ,constant now ot' fluid tliroughthe pump.

remises What is claimed is :v

1. A pump comprising` a cylinder having inlet and ont-let ports, means for dividing the interior of said cylinder into. a .plurality of annular chambers, axially movable means for s egregating said ports, a rotor operative 1n said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said, segregating means and made up o1 a member for each chamber, spacers separating said members, and through bolts holding said mem-bers and spacers together', and means for operating said rotor.

2. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, ari-'ally movable means for segregatingsaid ports, a rotorV operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of member' for each chamber, spacers separating said members, and through bolts` holding said members and spacers together, and means for operating said rotor, said dividing means including a plurality of stationary annular members having slots in their perimeters for positioning said segregating means.

3. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality ot annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the innerperimeter' orf said cylinder and; having helical 'faces operating said' segregating means and made up a member Vfor each chamber. spacers separating said members, and through bolts holding said members and spacers together, and means for operating said rotor, said dividing means including a plurality ot annularmembers bolted to'said cylinder and having slots in their perimeters for positioning said segregating means.A Y

l. il. pump comprising a cylinder having inleteand outlet ports, means Jfor dividing theV interior ot said cylinder into a plurality of annu-lar chambers, axialli' movable me'an-s Jfor segregating said ports, a roto-r operative in said chan-mers in peripheral Contact with the inner perimeter ol' said cylinder and having helical faces. operating said segregating means `and n'iade up ci a member for each chamber, spacers ,separating said members, and through bolts holding said members and spacers together, and means for operating said rotor, said segregating means including vanes axially sl-idable on the inner perimeter ot said cylinder between said ports.

5i, ,A ,pump comprising a cylinder having inlet and outlet ports,.means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the inner 'perimeter of said cylinder and having'- helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and through bolts'holding said members and spacers together, and means for operating said rotor, said segregating means including vanes positioned by said dividing` means and slidable therein in contact with the inner perimeter of said cylinder and between said ports.

6. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and through bolts holding said members and spacers together, and means for operating said rotor, said rotor being keyed to a shaft forming a part of said operating means.

7. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, andthrough bolts holding said members and spacers together, and means for operating said rotor, and means for draining said cylinder of fluid leaking past said rotor.

8. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating sai'd ports, a rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and through bolts holding said members and spacers together, means for operating said rotor, and means for draining into said inlet port any fluid leaking past said rotor.

9. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports, a

rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and through bolts holdingsaid members and spacers together, and means for operating said rotor, and pipes for draining into said inlet port any fluid leaking pastsaid rotor.

10. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plu-` rality of annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and throughbolts holding said members and spacers together, andr means for operating said rotor, said inlet and outlet ports being so located that the rotor completely closes them when its periphery at its widest part passes over them.

11. A pump comprising a cylinder having inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports, a rotor operative in said chambers in peripheral contact with the inner perimeter of said cylinder and having helical faces operating said segregating means andmade up of a member for each chamber, spacers separating said members, and through bolts holding said members and spacers together, and means for operating said rotor, said cylinder being provided with a set of four inlet ports and a set of four outlet ports, and said rotor being so mounted that two inlet ports and two outlet ports are completely closed when the other two inlet ports and the other two outlet ports are wide open.

l2. A pump comprising a cylin'derhaving inlet and outlet ports, means for dividing the interior of said cylinder into a plurality of annular chambers, axially movable means for segregating said ports1 a rotor voperative in said chambers in peripheral lcontact with the inner perimeter of said cylindeil and having helical faces operating said segregating means and made up of a member for each chamber, spacers separating said members, and through bolts holding said members and spacers together, and means for operating said rotor, four of said chambers being provided to balance the rotor and prevent end-thrust thereof in said cylinder.

In testimony whereof, I have signed myname to this specification.

JOHN. JACKSON.