US1246253A

US1246253A - Pump.

Info

Publication number: US1246253A
Application number: US12872816A
Authority: US
Inventors: Alexander T Fraser
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-10-31
Filing date: 1916-10-31
Publication date: 1917-11-13
Anticipated expiration: 1934-11-13

Description

A. T. FRASER.

PUMP.

APPLICATION FILED ocT. 3|. IsIe.

.w i. ii/w// I N 2 SHEETS-SHEET I.

WW a MQ/m Patented Nov. 13, 1917 Q/Vincooer i 'ALEXANDEB'TQFRASER 0F B UTTE, MONTANA.

PUMP.

To aZZ inkom 'it may concern.'

Be it known that LALEXANDER T. limsnn, a citizen'of the United States, residing at Butte, Silverbow county, State of Montana,

have invented .certain new and useful Inaprovements in Pumps, of which the following is a specification.

This invention relates to pumps and more particularly to rotary pumps of the centrifugal type especially adapted t-o be4 used for pumping fluid having more or. less gritty matter in suspension. The objects of the invention are to provide a pumpof this type which is mounted as a unit on a sub-base whereby vif the inlet and outlet connections are disconnected the pump may be removed-and a new one substiti ited; to provide a construction in which the impeller and driving means' are connected to a shaft.` and the shaft is mounted in a bearing pedestal which may be adjusted together with the shaft to properly position the impeller in the pump casing; to provide a pump casing lmade of hardened metal 'without any liner; which may be easily and quickly removed in order to substitute a new casing or impeller; to provide a new and 4novel means for securing the casing members together; to provide a new and novel means for securing the ianges to the inlet and outlet conduits of the pump; to provide an eiiicientconstruction of impeller b lade whereby the life of the same may be increased; and to provide a special form of sleeve to be carriedby the driving shaft and interposed between the latter and the packing'whereby wear directly on` the shaft is eliminated. These and other' features of the invention will be apparent from the description takenA in connection with the drawings, in which,

Figure 1- is a longitudinal section in elevation. taken through the entire construction; Fig. 2 is a sectional view through one 0f the impeller blades and showing the form of the latter;

Fig. 3 is an end elevation of the pump with a part of the casing broken away and showing the bases in cross section.

The construction comprises a sub-base 1'() which is adapted to be mounted on a concrete foundation., floor or other place where the pump is to beL installed. This sub-base,

Specication of Letters Patent.

. Application led October 3.1.

Patented Nov. 13, 1917.. ,ieie. serial no. leaves.

because of the special construction of the pump, may be permanently installed in the position which it is to occupy. As shown in Figs. 1 and'3, the sub-base is providedwith a substantially vertical flange 11 ady jacent its edges and the two longitudinal flanges 11 are adapted to support a base 12. As shown, this base is formed at its'opposite longitudinal edges with a downwardly projecting flange 13,'which is adapted tocooperate with the two longitudinal flanges l1 of the sub-base to prevent lateral movement of the `base with respect to'the sub-base. `The base'is adjustably secured lto the subbase by means of the bolts 14 which extend through slots 15 in the base and are threadedinto the sub-base 10. The base 12 may be reinforced by the longitudinally extendving ribs 16 and on its upper side carries two vertically projecting ribs 17 on which is adapted to be slidably mounted the bearing pedestal. The bottom of this pedestal consists of a plate 18 having side flanges 19 which are adapted to take over the vertical ribs 17 and thereby guide the pedestal in its longitudinal movement. It Ais adjustably secured to the base 12 by means of the bolts 20 which'extend through the slots 21 and are threaded into the base 12. In order'te provide means for easily moving the bearing pedestal relative to the base a bolt and nut construction is mounted at one end of the bearing pedestal. As shown in Fig. l, a lug 22 formedat one end of the base 12 has rotatively extending through the saine a threaded bolt 23 which engages a nut member '24 depending from the corresponding end of the bearing pedestal. Thus when the bolt 23 is turned the bearing pedestal will be moved relative to the base and may be clamped in adjusted position by means of the bolts 20. The bearing pedestal has two upright arms 25 carrying bearings 26 at their upper ends for the pump shaft 27. These bearings 26 are spaced apart and a driving pulley 28 may be keyed to the shaft and mounted between the bearings. 'At the end of the shaft opposite the pump a thrust bearing v29 may be provided and interposed between a bearing-26 and a collar 30 on the shaft. opposite the adjusting bolt 23 is a bracket 31 Connected to the basey at the end 50 'g '.'rotation of the shaftin the packing of the gland, flange 41, member 37 and the hard' l37 having at one end a flange 38 which is adapted to seat against the disk 32 and a boss 39 seated in the bore 33. The

disks

32 and 34 and theflange 38 are all clamped together by means of a series of bolts 40. The interior of the member 37 may be formed with a ilange 41, 'thefinner surface of which is adapted to bear on a hardened metal sleeve 42 mounted 'on the shaft 27. At its opposite end the member 37 is adapt- .ed to receive a gland 43 which may be of the usual construction and packing ofany desired kind may be interposed between the ened metal sleeve 42. A grease ring 44 may be located adjacent the flange 41 and provided with an annular groove 45 having a series of radially extending perforations 46, the member 3,7 being provided with an aperture 47 through which a lubricant may be injected to the grease ring.

The shaft 27 is formed with a reduced threaded end 48, thereby providinga shoul-I der 49.4 The sleeve 42 is made with an. inwardly ,projecting flange 50 at one end which is adapted to abut against the' shoulder 49. The -impeller of the pump consists' of a disk 51 having a centrally projecting hub 52, which is adapted to be mounted on the threaded end 48 of the shaft. On

' the opposite side of the disk 51 the impeller blades 53 are arranged. The hub 52 of the impeller is screwed onto the shaft so -that the flange 50 of the hardened metal. sleeve 42 will be clamped between the same and the shoulder 49. The sleevev 42 is thus securely -held in position and eliminates the wear which would otherwiserresult because of the stuiiing boX.

, Fig. 2 illustrates the shape of the impellerblades in cross section. As shown, the blade projects substantially at right angles from the disk 51 and at `its fr'ee end is formed with la flange 54. The blade and disk and the blade and flange are connected by the well rounded fillets 55. In pumpinggritty materials it is found that the blades are worn away very rapidly at the portion adjoining the disk. Consequently by providing llets the life of the blades is greatly prolonged.. j

The casing which surrounds the impeller consists of plurality` of members. The

disks

32 and 34 previously described form one side of the casing.v Because of the difference in diametersA ofy these two disks, an annular seat 56 is formed and the casing is adapted to be completed by a member 57 which has an edge 58 arranged in the seat 56. This casing member consists of a p'ecasing member may be provided with a discharge conduit 61. The impeller blades, casing member 57 and, if desired, the disk of the casing being ground to tightly lit inthe seat 56. The bosses 35 and 39 are slightly spaced apart, therebyA forming a chamber 62 to which water maybe fed by means of the pipe 63 to provide a waterseal. The disk 32y at its outer edge is provided with a rounded flange 64 and the casing member 57 is formed with a correspondingly arranged annular recess 65. The casing member -57 is adapted to be held and clamped to the

disks

32 and 34 by means of clamps which are 'arranged entirely .eX- teriorly of the same. As clearly shown in the drawings, 'these clamps 66 are formed at bne end with a hook member 67, which is adapted to take over the flange 64 on the 434 may be of hardened metal, the edge 58 disk-32, and at their other ends with a'lug 68 `through which is threaded a screw 69, the .end of which is adapted to be seated in therecess 65. Thus it will be apparent that by operating the set screw 69 the clamp will force the casing members together and hold them in clamped position. sired number of these clampsmay be used and because they may be spaced Aas desired the casing member 57 may be turned so that the discharge conduit 6-1 will be at any desired angle. Thus it will be apparent that a casing is provided which is made of'hard'- ened metal and has no liner and can be very quickly and easily taken apart and can. be adjusted for connection toa discharge pipe regardless of the angle the latter makes with the pump.

Becausethecasing member is formed of lhardened metal it is practically impossible to machine the same and for this reason a. special connection must be provided in order tomount the pipe flanges on the inlet and discharge conduits. As clearly shown in the drawings, this construction comprises one or more beads 70 whichare formed on the eX- terior of the conduits.

Any 'def- The flange 73 adaptedto be mounted on these conduits has its bore formed with an equal number of recesses 71 corresponding to the beads 70 and the said bore is of such a diameter that the flange will just slip over the beads 70 when it is hot. Consequently when it has cooled the beads and recesses will coperate to hold the 'flange'on the conduit. However, as there will be a space between these parts a filling 72 of any desiredy composition or alloy may be run in between the same while the flange is still hot. Thus it will be apparent that the flange is very securely mounted on the conduits. Furthermore because the flanges are detachable, when the casing is worn out they may be taken off andy mounted on a new casing thereby saving the cost of the same. Heretofore casings which have been constructed of hardened metal have had the flanges cast integral therewith because it has been impossible to thread the inlet and outlet conduits duel to the hardness of the metal.

It will be noted that because of the location of the joint between the casing members and because of the side disk 51 on the impeller said joint is subjected to very little wear as there is practically no circulation of fluid between the disk 5l of the impeller and the disk 34 of the side of the casing. Furthermore, because the entire pump is mounted onxa sub-base the inlet and discharge connections may be broken and the pump slid to one sideon the same and any desired repairs made. Then the pump may be pushed back toits former position, or the pump may-'beentirely removed and a duplicate `one substituted. Because of the .sub-base, the new pump will be in correct position and alinement. It will b`e observed that because the impeller has a disk 51 at one side and is open at the other the wear on the casing 5T ,will begreatest on the left hand'portion7 as viewed in Fig. l. This wear may be compensated for and the impellei moved toward the left hand side of the casing by means of the adjusting screw 23. By properly turning this screw the bearing pedestal together with a shaft 27 and the impeller mounted thereon will be moved to carry the impeller toward the left hand side of the casing. It is obvious that this adjustment may be made while the pump is running and is very easily and quickly performed.

Although the flanges 73 have been described as having a bore slightly smaller than the exterior diameter of the beads 70, it is ap'parentthatthe bore might be of the same diameter `or slightly larger than the beads as the alloy will securely hold the flanges in position.Y Even `if the bore is of greater diameter than the beads, it is advisable to heat the flange as tlic alloy flows in more readilv, and the contraction of the flange in cooling assures a tight fit between the parts.

It is obvious that many changes mav be made in the structure without departing from the spirit of the invention.

.Having thus described the invention, what is claimed and desired to be secured by Letters Patent is:

l. A pump construction comprising a casing, a base, a bracket'carrying said casing and mounted on said base, a bearing pedestal adjustably supported on said base for movement toward and from the bracket, said pedestal having two spaced bearings, a shaft projecting into the casing :carried by the bearings of said pedestal and movable with the latter and hav-ing a pulley mounted between said bearings, an impell'er mounted on the shaft within the casing, and means for adjusting said pedestal on said base whereby theV impeller may be properly positioned in the casing.

2. A pump construction comprising a sub-base, a base carried by said sub-base and having a bracket at one end, a centrifugal pump vcarried by said bracket, a bearing pedestal adjustably supported" on said base, and a driving shaft mountedin` said bearing pump. A

3. In a centrifugal pump construction, a shaft having one end reduced forming a shoulder.y an iinpeller mounted onsaid reduced end, a hardened metal sleeve having an inwardly projecting flange at'one 'end thereof, said sleeve arranged on the shaft with the ange clamped between the im- -peller and the shoulder, and a stuffing box surrounding said sleeve.

.In a centrifugal pump construction, a bracket provided with a disk, a second disk of smaller diameter attached to the first disk therebv forming an annular seat, aA

. ed to handle gritty material, comprising a casing having aV plurality of members of hardened metal, one of-said members having a discharge conduit and radially removable means arranged entirely eXteriorly of said members for holding the members topedestal and extending into said ioo ios

gether with the said conduit arranged inl any desired tangential position. i

6. A centrifugal pump construction adapt- .ed to handle gritty material comprising a casing having a pluralityof members of hardened metal, one of said members having a discharge conduit, and clamps eX- tending around the peripheries of and engaging"the two end members and adapted to secure the memberstogether with the said y i conduit arranged in anyydesired tangential position.

7. In a centrifugal'pump construction, a casing of hardened metal having inlet and outlet conduits, means for securing a flange izo-said conduits comprising a bead formed around said conduits, a ange formed with a corresponding recess inthe bore thereof, the' diameter of the bore being 'such as to 5 just slip over the bead -when the flange is hot, and an alloy metal filling between the bead and the bore of the flange.

8. An impeller for a centrifugal pump the blades being formed with anges at theii,` other edges and joined to the disk and anges with Well roundedfillets.

In testimony whereof I 'affumy signature.

ALEXANDER T. FRASER. I