US1390932A

US1390932A - Rotary pump

Info

Publication number: US1390932A
Application number: US410251A
Authority: US
Inventors: Shiner Albert Edward
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-14
Filing date: 1920-09-14
Publication date: 1921-09-13
Anticipated expiration: 1938-09-13

Description

A E. SH|NER ROTARY PUMP.

APPucATloN man SEPT. 14, 19,20.

Panted Sept. 13,' 1921.

3 SHEETS-SHEET L A. E. SHINER.

ROTARY PUMP.

APPLICATION FILED SEPT. I4, 1920.

Pand sept. 13,1921.

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ROTARY PUMP. APPLICATION riLEb sPT.14. |92o.

1,390,932. Patentedsept. 13,1921.

3 SHEETS-SHEET 3.

ALBERT EDWARD SHINER, OF LONDON, ENGLAND.

ROTARY PUMP.

Specication of Letters Patent.

Patented sept. 13, 1921.

Application led September 14, 1920. Serial No. 410,251'.

To all whom 'it may concern Be it known that I, ALBERT EDWARD SHINEI?, a subject of the King of Great Britain, residing at London, England, have invented a new and useful Improved Rotary Pump, of which the following is a specification.

This invention relates to an improved rotary pump of the type comprising a cylindrical pump chamber and a cylindrical piston of smaller diameter mounted therein, with its axisparallel to the axis of the pump chamber, in such -a manner that the exterior cylindrical wall of the piston is in contact with the interior wall of the ump chamber along a line parallel to the axes ofboth these members. This piston is moved by an eccentric so that the said line of contact moves progressively around the cylindrical walls of the piston and pump chamber, and a radially sliding partition plate, opposite edges of which extend into grooves in 'the piston and the pump chamber, re-

, spectively, is provided between inlet and outlet oriiices respectively leading into and out from the said pump chamber.

ow, according to this invention, the radially sliding plate is constructed as /a cut oil' or slide valve, and the walls of the groove in which it slides form valve faces having inlet and discharge ports respectively openin therethrough, so that these ports, under t e controlffof the cut off valve, can be put into communication with the pump chamber on opposite sides of the said cut off valve respectively.

In the accompanying drawings Figure 1 is an end view of the improved rotary pump with an end plate and one supporting standard removed.

Fig. 2 shows a vertical axial section of the same.

Fig. 3 is an end view -of the piston of this pump.

Fig. 4 shows a section on the line 4 4,

ig. 5 shows a section on the line 5--5, Fi 3.

ig. 6 shows a section on the line 6-6, 4. igs. 7 and 8 are respectively an end and a side view of the cut oif valve of the irnproved pump.

9 and 10 are detail views of the trunnions supportingl the rotary parts of the pump.

Referring to these drawings, 10 is a base plate supporting uprights or

standards

11, 12. In the standard 11 is mounted a tubular trunnion 13 the bore of which acts as an inlet conduit 14, and this trunnion is formed with an exterior concentric bearing surface 15-and an exterior eccentric bearing surface 16. In the standard 12 is mounted a similar tubular trunnion 17 the bore of which acts as a discharge conduit 18,l and this trunnion 1s formed with concentric and eccentric

bebarlng surfaces

19, 20 respectively in axial alinement with the

bearing surfaces

15, 16. These inlet and

outlet trunnions

13, 17 are held against rotation in the

standards

11, 12 by keys 21 or set screws 22.

The pump body 23 is formed with an interior cylindrical chamber'24 closed by end plates 25 rotatably mounted on the

concentric bearing surfaces

15, 19 of the inlet and discharge trunnions. Exteriorly to the pump body and integral therewith or fixed thereto, there is rovided a belt pulley 26 or other means w ereby the pump body can be rotated about the bearing surfaces l5, 19 on which the end plates 25 are mounted.

Within the pum chamber 24 is arranged a hollow piston 217 cylindrical wall and end plates 27a in which central concentric apertures are formed which are mounted on the eccentric bearing surfaces 19, 2O on therinlet and outlet trunnions above described. The said piston is moreover formed with an exterior groove or slideway bounded by

lateral walls

28, 29. The hollow interior of the piston 27 is divided into two

compartments

30, 31 sepaformed with an outerv rated by a curved or angular partition wall 32, the inlet conduit 14 opening into one compartment 30 and the outlet conduit leading from the other compartment 3l. Communication between each ments and the pump chamber 24' can be established, under control as hereinafter described, through

ports

33, 34 formed in the said

lateral walls

28, 29.

A double cut-off valve 35 is formed with a cylindrical enlargement 36 along one edge thereof and this enlargement 36 is accomodated in a cylindrical pocket provided in an enlargement 37 of the wall of the pump body. The

opposite faces

38, 39 of the valve reciprocate on the faces of the lateral walls of these compart-I vantageous in preventing the slide valve from getting out of alinement with thev rotation of the pump body 23 the hollow piston 27 moves with it, the double cut off valve 35 acting as a driving dog between these parts, and owing to the piston being mounted eccentrically to the pump chamber the line of contact between these parts moves round the interior wall of the pump chamber in a relatively opposite direction. Owing to the manner in which motion is communicated from the pump body to the piston, that is to say through the valve, the latter is caused to oscillate slightly in the pocket 36 about the axis of the pocket but this has no effect on the operation of the pump and is only an incident of construction.. At the same time the 'valve 35 is reciprocated in the roove in a direction radial to the piston so t at at the instant the line of contact passes across the break in' the pump chamber wall through which the valve projects, both faces of the valve 35 are entirely closed on their seats on the

walls

28, 29 of the groove and the pump chamber is during this period cut oi' ffrom-both the inlet and outlet chambers in the hollow piston and there can be no regurgitation of the fluid passing through the pump. This is not the case in constructions in which the inlet and outlet ports open through either the cylindrical walls or end walls of the pump chamber or piston so that, at times, as the line of contact passes between the inlet and outlet orifices, these orifices are indirect communication through the pump chamber.

In my improved pump the iuid moved along in advance of the line of contact, when the valvef35 opens, is expelled through the port 34 in the wall 29 into the compartment 31 within the piston and thence to the discharge' conduit 18.

The invention has been hereinbefore described more particularly with regard to its use in a hydraulic pump but the improved construction is also applicable to air or other pumps, moreover by reason of the special arrangementof the cut off valve the principle of the invention can be used in theconstruction of a motor, actuated by*- steam, water, air or other fluid yunder pressure.

I claim 1. A rotary pump comprising a cylindrical pump chamber, a cylindrical piston of smaller diameter mounted therein, one of sald parts provided with oppositely arranged valve faces having ports opening therethrough and forming a slideway and one of said parts being provided with a Aguideway, a cut olf valve slidable between said valve faces and having an oscillatory support in the other of the said parts, a tail rod on said cut-off valve working in said guideway, and means for moving the piston within the pump chamber.

2. A rotary pump comprising a cylindrical pump chamber, a cylindrical piston of smaller diameter mounted therein, one 'of said parts provided with oppositely arranged valve faces having ports openin therethrough and forming a slideway an also provided with a guideway, a cut off `valve slidable between said valve faces and havin an oscillatory support in the other of the said parts, said cut-od valve having similar faces on its opposite sides to coperate with the ported valve faces in order simultaneously to alternately`cut off and open in equal degrees communication between the said ports and the interior of the pump chamber, a tail rod on said cut-off valve and means forl moving the piston within the pump chamber.

3. A rotary pump comprising a cylindrical pump chamber, a hollow cylindrical piston of smaller diameter mounted therein,

said piston having oppositely arranged valve faces each having a port opening therethrough, said valve faces forming a slideway, said piston also havin a guideway, a wall within the said piston dividing its interior space into separate compartments with which said orts respectively communicate, a cut off va ve slidable between said valve faces and provided with a rail rod working in said guldeway and having an oscillatory support in the wall of the ump chamber, and means for moving the plston within the pump chamber.

4. A rotary pump comprising a cylindrical pump chamber, a hollow cylindrical piston of smaller diameter mounted therein, said piston having oppositely disposed valve faces each having a port opening therethrou h and provided with a guideway, Said valve aces formin a slideway, a wall within the said piston dlviding its interior space into separate compartments with which said ports respectively communicate, separate conduits respectively in open communication with the Isaid compartments, a cut off valve slidable betweensaid valve faces provided with a tail rod Working in .said guideway and having an oscillatory support in the wall of the pump chamber, and means for moving the piston within the pump chamber.

5. A rotary pump comprising a cylindrical pump chamber, a, hollow cylindrical piston of smaller diameter mounted therein, said piston having oppositely disposed valve faces having ports dpening therethrough and provided with a guideway, said valve faces formin a slideway, a wall within the said piston ividing its interior space into separate compartments With which said ports respectively communicate, a cut off valve slidably mounted in the said slideway and having faces on its opposite sides thereof to coperate with the said orted valve faces respectively and providedp with a tail rod working in said uideway, an oscillatory support for the said cutoff valve arranged int e Wall of the pump chamber, and means for moving the iston progressively along a circular path within the pump chamber s0 as to cause the cut olf valve to be reciprocated in the said slideway.

6. A rotary pump comprising a cylindrical pump chamber, a hollow cylindrical piston of smaller diameter mounted therein,

one of said pa'rts havinga guideway, and said piston having oppositely disposed valve faces each having a port opening therethrough, said valve faces forming a slideway, a wall within the said piston dividing its interior space into separate compartments with which said plorts respectively communicate, trunnions aving conduits formed therethrough in openK communication respectively, with the separate compartments within the piston, said trunnions being provided with axially alined bearing surfaces on which the pump chamber is rotatably mounted and with other axially alined bearing surfaces arranged eccentrically to said first-named bearing surfaces and on which the iston is rotatably mounted, and a cut off vaFve slidably mounted between the said valve faces and having an oscillatory support in the wall of the pump chamber and provided with a tail rod working in said guideway.

7. A rotary pump comprising a cylindrical pump chamber, a hollow cylindrical piston of smaller diameter mounted therein, said piston being provided with a guideway and with oppositely disposed valve faces, each of said valve faces having a port openingl therethrough and said valve faces together forming a slideway, a wall Within the said piston dividing its interior space into separate compartments with which said ports respectively communicate, a cut off valve slidable between said valve faces and having an oscillatory support in the wall ofV the pump chamber, a tail rod on the said cut off valve extending into the guideway in the piston, and means for moving the piston within the pump chamber.

ALBERT EDWARD SHINER.

Witnesses:

HERBERT ARTHUR BnEsToN, FREDnRIcK ARTHUR WILLIAMS.