US2632399A

US2632399A - Rotary pump

Info

Publication number: US2632399A
Application number: US782974A
Authority: US
Inventors: Hyre Warren
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-10-30
Filing date: 1947-10-30
Publication date: 1953-03-24
Anticipated expiration: 1970-03-24

Description

March 24, 1953 w. HYRE 2,632,399

ROTARY PUMP Filed Oct. 30, 1947 4 Sheets-Sheet 1 F I6. I

54 a 55 3nnentor 6 9., WARREN. HYYRE,

March 24, 1953 w. HYRE 2,632,399

ROTARY PUMP Filed Oct. 50, 1947 4 Sheets-Sheet 2 I l V Snventdr l3 WARREN HYRE,

4M A. attorney March 24, 1953 w, HYRE 2,632,399

ROTARY PUMP 4 Sheets-Sheet 3 Filed 001;. 30, 1947 Snventoi M (Ittomg WARREN HYRE,- 3g

March 24, 1953 HYRE 2,632,399

ROTARY PUMP Filed Oct. 50, 1947 v 4 Sheets-Sheet 4 3nventor WARREN HYRE Gttorneg Patented Mar. 24, 1953 UNITED STATES PATENT OFFICE ROTARY PUMP Warren Hyre, Chattanooga, Tenn.

Application October 30, 1947, Serial No. 782,974

13 Claims. (01. 103-138) This invention relates to improvements in roy pumps and has for a principal object the provision of an improved positive action, sliding vane type of rotary pump capable of effectively pumping concrete, as well as other materials of a semi-fluid or viscous nature.

A rotary pump according to the invention is characterized by a two-part or sectional casing and the parts thereof may be axially separable and hingedly connected whereby the casing may be readily opened up to permit washing out after each pour or run of the material being pumped, for example, for inspection of casing and rotor parts, and for repair and/r replacement of worn parts. The rotor is also preferably constructed in two halves which are bolted together whereby it may be readily disassembled for the purpose of repairing or replacing worn parts and thereupon reassembled with equal facility.

Another important feature of the invention is the provision of means whereby any material such as grout or sand working into the slide-ways provided in the rotor for the sliding pistons or vanes thereof, or along the sides of the rotor or' vanes, is caused to pass harmlessly through the rotor or the casing end walls without damaging or causing undue wear of the casing and/or rotor parts. Simplified and readily replaceable wear and guide bushings for the moving parts of the rotor are employed throughout and, as a further feature of the invention, expanding packings effective against the faces of the sliding vane are provided for the purpose of sealing the rotor slide-ways against substantial leakage of the material being pumped along the faces of the vanes.

The above and other features and objects of a rotary pump according to the invention will appear from the following detailed description taken with the accompanying drawings illustrating a physical embodiment of the invention selected for the purpose of ready disclosure, it being understood that the invention is not limited to the specific details shown, in which- Fig. 1 is a vertical section taken along line l| of Fig. 2, illustrating interior construction of a rotary pump for pumping concrete and like materials according to the invention;

Fig. 2 is a section taken generally along line 2-2 of Fig. 1, the sliding pistons or vanes being omitted to illustrate details of rotor construction and mounting;

Fig. 3 is a section taken along line 3-3 of Fig. 2;

Fig. 4 is a detail view looking into the periphery of the rotor at th end of a slide-way provided therein;

Fig. 5 is a section taken along line 55 of Fig. 4, illustrating a preferred mode of packing the vanes at the outer end of the slide-ways in which the vanes operate;

Figs. 6 and 7 are detail section views taken on lines 66 and 'l-'! of Fig. 1;

Figs. 8 and 9 are detail views illustrating th construction and intersecting relation of the sliding vanes operating in the rotor aforesaid;

and

Fig. 10 is an enlarged detail view of a specially constructed hinge between casing parts which permits the pump casing to be readily opened up.

Referring to the drawings, reference character 8 (Figs. 1 and 2) generally designates a pump casing having an inlet 9 and an outlet [0. The casing may be of two-part construction, as shown, of which the parts H and I2 are preferably formed as castings which together are adapted to provide a cylindrical pump chamber. Referring to Fig. 2, the casing part II is shown to be fixed to a stationary mounting plate 13, and the casing part I2 is adapted to be bolted to the fixed casing part H by means of a plurality of spaced swing-bolts l4 hinged to lugs I5 projecting exteriorly from the fixed casing part. The free ends of the bolts l4 are adapted, in the assembled position of the casing parts, to pass into the bifurcations of correspondingly spaced lugs l6 projecting exteriorly from the casing part I 2, and to be secured by nuts I1. Accordingly, by unthreading said nuts and by removing key 25 to be described, the movable casing [2 may be disconnected from fixed casing part H for the purpose of opening up the casing.

Suitable means are provided to support the movable casing part l2 in its opened-up position. Referring to Figs. 1, 2 and 10, such means prefer-- ably include fixed hinge bars [9, 20 extending from the base of the fixed casing part II, each terminating in a narrow-width tongue 2|. A hinge pin 22 connects each of the tongues with the forked end of a headed shank 23 provided with a through opening 24 for the reception of a locking key 25. As best seen in Fig. 10, movable casing part [2, upon unthreading of bolts l1 and removal of locking keys 25, may be pulled axially outwardly from fixed casing part I I for the length of studs 23 until it engages the heads'26 thereof which function as stops limiting axial separation of the casing parts. Upon the casing part I2 engaging the shank heads, its inner face clears the hinge joints between hinge bar tongues 2| and studs 23, thus to permit the casing part [2 to be swung downwardly to its dotted-line position (Fig. 10). Since the hinge is capable of sup-'- porting the movable casing part i2 in its dottedline position, the operator is relieved of any requirement of holding the same in open position or of lowering it to a supporting surface.

Referring to Fig. 2, the casing parts I I, I2 are provided in their end walls with axially aligned

hubs

21, 28 in which the pump rotor to be described has bearing, the hubs being accordingly formed eccentric to the casing axis. The end walls of each casing part are also provided with a plurality of radial slots 29 (Fig. 3) opening to the casing exterior whose function will be described.

Contained within the casing and mounted to turn on an axis eccentric to that of the pump chamber is a rotor generally designated 30. The rotor may be made in two half-sections, the halves 3|, 32 thereof being rigidly although separably connected in face engagement by a plurality of circumferentially spaced bolts 33, the heads 34 thereof and their securing nuts 35 being accom m'odate'd in annular recesses formed in the inner faces of the end walls of the casing parts H, l2 as shown in .Fig. 2. The aforesaid slots 29 connect with said end wall recesses.

"The'rotcr-halves are each formed with oppositely :extending

trunnions

35, 35 adapted to be supported in the casing hubs 2i, 2 8, the trunnions turning in suitable sleeve bearings 31, 3711 contained in said hubs. Ring packings 38, 380. may be arranged between the inner radial faces of the hubs 2.1, 28 and the outer radial faces of the rotor halves and segmental wear and packing rings 39, 3911. set into outer edge recesses formed in the rotor (Fig. 2) are effective between said outer edges and the casing end walls. Oil holes M, Ma provide for lubricating said bearings.

A drive shaft 42 driven from a suitable source of power such as an electric motor (not shown) extends into the one trunnion 35 of rotor half 3| and drives the same and hence the rotor through a key 43. It will be observed that the drive shaft 42, rather than extending axially through the rotor in the conventional manner, terminates at about the inner end of the trunnion 35 to'which it is drivingly connected. Since the rotor is bored for its full axial length, there results an open-ended central passage 44 which extends axially through the rotor from the end of the drive shaft to the casing exterior.

Asseen in Fig. 1, the rotor is formed with intersecting, diametrical slide-

ways

45, 56 which extend across and thus communicatewith the axial passage 44 of the rotor. Intersecting, rightangularly disposed pistons or

vanes

41, 48 are mounted to slide in said slide-ways. By reference to Figs.8 and'9, the vanes may 'be of "the twosection construction shown, the sections 41a, 41b and 48a, 48b thereof being disposed in tandem relation and urged outwardly of each other by pairs of springs tic, 480, respectively, coiled on spaced spring retaining legs 41d, 48d formed on the adjacent ends of the vane sections as shown. Since the vanes intersect one another, the spring retaining legs of one pair of vane sections, such as the sections 47a, 41b of vane 47, are spaced apart but a small distance so that they may be accommodated in and move across the greater space provided between the spring retaining legs of the. sections 48a, 48b of the other vane. Accordingly, the vanes mayoperate independently of one another and without interference in their sliding motion through the rotor. The action of the vane springs 41c, 48c is to cause the tip. edges of the vanes to engage against and follow the outer peripheral wall of the pump chamber as the rotor turns in the casing, the sections of each vane withdrawing and expanding relative to each other during such rotation. As the width of the vanes at their outer or tip ends corresponds to that of the rotor and hence to the axial depth of the pump chamber, the material to be pumped entering inlet 9 of the pump chamber is propelled by the vanes to the pump chamber outlet ill from whence it is discharged under positive pressure. Preferably, the vanes are tipped with rubber, neoprene or equivalent material whereby they may effectively seal against the peripheral wall of the pump chamber even though the material being handled incorporates coarse particles such as sand, gravel and the like. The pump chamber may also be lined with rubber, thus to reduce wear both on its surface and on the rubber tips of the vanes by the abrasive action of said coarse particles, as well as to cause more easy movement of the vanes.

Instead of forming the vanes with tandemsections as shown, they may be formed by two-overlapping sections sliding on .one another. If the casing is formed with an elliptical or substantially elliptical rather than circular chamber, the intersecting vanes maybe of one-piece construction. According to a further important feature .of the invention, packing means effective :against the faces of the sliding vanes are provided .at the ends of the vane slide-ways. Referring-to Figs. 4 and 5, such packing means preferably takes the form of strips or blocks 5-0, 5| of expansible packing material such as rubber, feltor the .like extending the width of the vanes and being-compressed into tight packing engagement with the opposite faces thereof .by meansofcompressing

screws

52, 53 threaded into the .outer end .faces of bearing guides 54, 55 disposed in theslide-Ways inwardly of the packing. Said bearing guides may consist of blocks of bearing metal or of hard rubber, neoprene, fiber, felt or the like. It will be observed that the bearing guides and packing carried thereby are set into recesses provided .adjacent the outer ends of the vane slide-Ways. As seen in Fig. 5, the heads of the screws may seat on a metal strip 56 which is set. into each packing strip to extend substantially the length thereof. By tightening the

screws

52, 53, the packing strips 50, 5i are caused to expandinto tight engagement against the faces .of the vanes and to provide an effective seal therefor.

To prevent the packing strips from expanding in endwise direction, each strip is confined between annular confining rings 51, .58., which are. secured against the outer side faces of the rotor by the bolts 33 which secure the rotor halves together. Said confining rings may carry pins-53 which extend into corresponding holes provided in the outer side edges of the "bearing guides 54, 55, the pins thus serving to anchor the guides and the confining rings preventing any endwise expansion thereof beyond the end faces "of the the corrugations extending longitudinally and communicating with the corrugations of the bearing guides 5 55. As the slide-ways open into the open-ended axial passage A l of the rotor, it will be observed that any sand or grout working by the outer vane packings 55, 5! passes radially inwardly along the corrugations to the rotor bore, from whence it passes harmlessly to the exterior of rotor and casing, As respects any material leaking past the side faces of the rotor, such harmlessly discharges to the casing exterior through the slots 29 provided. in the end walls of the casing.

It is also within the purview of the invention to prevent leakage of the material being pumped past the

vane packings

59, 5|, either by closing the slots 29 or by initially constructing the easingend walls without said slots, and thereupon forcing water or other suitable liquid under pressure through the open end of the rotor bore and thence radially outwardly through the slideways thereof, thereby water-sealing the slideways against entrance of sand, grout or like material through the outer ends of the slide-ways.

Without further analysis, it will be observed that a rotary pump as described is designed for and particularly adapted to the pumping of concrete and like materials of a coarse or semi-fluid or viscous nature. The hinged connection between the casing parts permits the casing to be opened up in a simple operation for washing out after each pour or run of the material, for inspection and for repair or replacement of worn parts. As the pump is designed for the handling of semi-fluid materials which may incorporate relatively coarse particles, provision is made for sealing off the vane slide-Ways from any substantial leakage of the material into the slideways along both the faces and edges of the vanes. But in the event of such leakage, means are provided for effecting harmless passage of the material through the rotor or out of the casing end walls, so that undue Wear or damage to the moving parts of the rotor or to the rotor itself is precluded. Since the pump casing may readily be opened up, all bearing and guide parts, which are themselves of simplified construction and of design permitting simple replacement, may be easily replaced when worn.

As the invention is not confined to the specific details illustrated, it is intended that all matter contained in the above description or shown in. the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. In a rotary pump, a casing having peripheral inlet and outlet passages and providing a pump chamber and having end walls, a rotor provided with a diametrical slide-way, a vane mounted to slide therein, a rotor driving shaft extending into the chamber through one end Wall only of the casing and being drivingly connected to the rotor, the rotor having an axial passage opening through the other casing end wall, said passage being in communication with the slideway, and the faces of the slide-way on which the vane slides incorporating leak means communieating with the axial passage, said leak means providing for the discharge of any material being pumped which may leak into the slide-way along the face of the vane.

2. In a rotary pump, a casing having peripheral inlet and outlet passages and providing a pump chamber and having end walls provided with slots opening to the exterior of the casing,- a rotor having a diametrical slide-way, a vane mounted to slide therein, a rotor drive shaft drivingly connected to said rotor, said end wall slots providing for the discharge of any material leaking past the edges of the vane or the side faces of the rotor to the casing exterior.

3. In a rotary pump, a casing havingperipheral inlet and outlet passages and providing a pump chamber and having end walls provided with a material discharge opening to the exterior of the casing, a rotor provided with a diametrical slide-Way, a vane mounted to slide in said way, the rotor having trunnions extending into aligned openings in the casing end walls and being journaled for rotation in bearings mounted in said openings, a rotor drive shaft having a drive connection with one of the rotor trunnions, the rotor and its other trunnion having an axial passage communicating with the rotor slide-way and extendingto the exterior of the casing, and the faces of the slide-way on which the vane slides being provided with radial passages communicating with the axial passage, the construction and arrangement being such that any material bein pumped which leaks past the edges of the vane and any such material which leaks past the faces of the vane may discharge to casing exterior.

4. In a rotary pump, a casing having peripheral inlet and outlet passages and providing a pump chamber, a rotor having a diametrical slide-way and an axial passage intersecting said slide-way and extending to casing exterior, a

vane mounted to slide therein, the walls of the slide-way on which the vane has sliding bearing being formed with means providing radial passages for the radially inward movement to the axial passage of any of the material being pumped which may leak into the slide-way along the face of the vane.

5. In a rotary pump, a casin having peripheral inlet and outlet passages and providing a pump chamber, a rotor operatively mounted in the chamber and having a diametrical slide-way and an axial passage communicating with said and extending to the casing exterior, a vane mounted to slide in the slide-way, the walls of the way on which the vane has bearing being formed with corrugations providing radial passages communicating with said axial passage and through which any of the material being pumped which may leak past the faces of the vane is carried to the exterior of the casing.

6. In a rotary pump, a casing having peripheral inlet and outlet passages and providing a pump chamber, a rotor operatively mounted in the chamber and having a diametrical slide-Way and an axial passage communicating with said way and extending to the casing exterior, a vane mounted to slide in the slide-way, oppositely di-sposed bearing guides for the vane seating in recesses provided in the opposite walls of the slideway adjacent its outer end, the faces of the guides adjacent the vane being provided with corrugations providing radial passages communicating with the axial passage and through which material leaking past the vane may discharge to casing exterior.

7. In a rotary pump, a casing having peripheral inlet and outlet passages and providing a pump chamber, a rotor having a diametrical '7 the siide way adjacent its: ends. and which, open through the'p'eriphery oi the. rotor, compressible packing material. adapted to seal against;v the faces of the vane and being mounted in said recesses outwardly of the bearing guides, and means for compressing said packing material against theouter end faces: of the bearing guides.

8. In. a rotary pump, a casing having peripherali-nlet and outlet passages and providing a pump chamber, a rotor operatively' mounted in said chamber and having a diametrical. slide-way and an. axial. passage in: communication with the slide-way and extending to the casing exterior; a vane mounted to slide in the slideway, oppositely disposed bearing guides for the vane seating in: recesses prmd'ded in the opposi-teiwal'ls of. the slide-way adjacent its ends, the adjacent faces of the guides and walls of the slide-ways inwardly of the hearing guides being provided with corrugations openings into said axial passage and providing for the harmless passage through the rotor of. any material being pumped which may leak into the slide-way along the facesof. the vane.

9; In a. rotary pump, a casing having peripheral; inlet. and outlet passages and providing a pump chamber, arotor operatively mounted in said chamber and having a diametrical slide-way, a vane mounted to slide therein, resilient packing mean-s extending the width of the vane adapted to seal against the faces. of the vane and being positioned at the outer ends of: the slide-Way so as to normally. prevent leakage of the material being pumped into the slide-way, means for compressing said packing means in radial inward direction. thereby :causing it to expand and seal against the faces of the vane, and means on the end tacos. of the rotor for confining the ends of the packing means against expansion in endwise. direction.v

10. A rotary pump as set forth in claim 9,. wherein the rotor is provided with an axial passage to casing exterior, and wherein the faces of the slide-way on which. the valve slides are provided with corrugations forming radial passages extending: between the packing means and the axial passage through which any of the. material being. pumped which leaks past the packing meansmay pass harmlessly to casing exterror.v

11.. In arotary' pump, a. casing having. periphera]; inlet: and outlet passages and providing a. pump chamber, a rotor operatively mounted in said chamber andhaving. adiametrical slide-way,

8? a vanemountedgto slide therein, oppositely dis posed' hearing guides for the vane seating in recesses' provided in the opposite walls of the slide-- way adiacent'its ends, packing for saidv vane disposedthe outer ends of said recess, means for compressing the packing against the outer end edges ofthe bearing guides thereby to expand the packing against the faces of the vane, and packing con-fining means carried by the rotor for preventing endwise expansion of. the packing.

12. In a. rotary pumpas set forth in claim 11, wherein the packing confining means is also effective to locate and prevent endwise movement ofthebearing guides;

13. A rotary pump as set forth in claim 11, wherein the rotor is provided with an axial passage to casing exterior, and wherein the faces of the guides adjacent the vane and the walls of the slide-way inwardly of said guides are provided with corrugations forming radial passages communicating with said. axial passage, whereby any of the material being pumped which leaks past the packing may pass harmlessly to casing. exterior;

WARREN I-IYRE.

REFERENCES. CITED The follo wing references are of record in. the fi-leof this patent:

UNITED STATES PATENTS Number Name Date 628,989 Penn July 18, 1899 693,470 Walker Feb. 18, 1902,. 1,042,951 Nielsen Oct. 29, 1912' 1,111,160 Larsenet al Sept. 22, 1 914 1,127,668 Nielsen et a1. Feb. 9, 1915' 1,366,138 Traud-t Jan. 18, 1921 1,672,257 Heitz June 5, 1928 1,974,112 Johnson Sept. 18, 1934. 2,035,465 Erskine et a1 Mar. 31, 1936' 2,193,177 Laythorpe Mar. 12,1940 2,294,352 White Aug. 25, 1942 2,353,965 Meador July 18,1944 2,367,326 'Beckman Jan. 16', 1945' 2,372,816 Deschamps et a1. Apr. 3, I945- 2',462, 732 Dusevoir 'Feb. 22', I949 2,514,521 Shaft July I1, 1950 FOREIGN PATENTS;

' Number Country Date 633,604 Denmark" May 28, 1945' 552,877 Great Britain Apr. 28, 1943 684,149- France Mar; 11, 1930