US2179730A - Pump - Google Patents

Description

Nov. 14, 1939. E. J. RUTHMAN Filed May 21, 1936 2 Sheets-Sheet 1 0 0 9 6 I. Z 1 a m.

a 7 NW .6 I. M 3 Z WWW m WM W w m w m W Nov. 14, 1939. a. J. RU HMAN 2,179.730

PUMP Filed May 21, 1936 2- Sheets-Sheet 2 INVENTOR. EDWARD J. RUTH/1AM ATTORNEYS Nov. 14, 9

uNi'rao srA'res PATE T orrlcs new Edward J. Euthman, om.

Application May :1, 19:0, Serial No. 81,04;

1 ohm. (e1. res-10o This invention relates to improvements ina circulating pump such as is used for circulatinl lubricant, cooling medium, cutting compound,

and the like, relative to a machine tool assembly. 1

The principal object o! the present invention is-the provision or a circulating pump whichis relatively simple in construction. requiring u w w um amount of machining. and which an be disassembled for inspection and the without completely dismantling the pump.

Another object of this invention is the pros vision oi a self-contained pump which can be assembled in a machine toolorganization with the piping eilectively arranged adjacent the pump to thereby take up a small amount of room.

A further object of this invention is the pro- I vision of a self-contained pump of the class above referred to in which the impeller can be readily e 1"1 without removing the pump from 'its place of mounting.

Another object of the invention is the provision of a self-contained pump in which provision is-made to prevent mist, spray, and the like from entering the motor chamber or housing, and whereby the said motor is protected from the said mist, spray, and the'like.

A still 2 her object oi the invention 'is the provision o v a self-contained pump in which the motor is provided with means to insure the prol er lubricatibn of the moving parts and at the same time prevent the lubricant from contact with the motor parts.

It is also an object of this invention to provide a selboontained circulating pump in which there are no metai-to-metal bearings? birt which utilizes merely the bearings of the attached motor, and which bearings are fully protected against spray. andioreign particles stirred up by the pump in its circulation. v

Other objects and advantages of the present invention should be readily apparent by reference to the following specification considered in coniunctionwith the acoompanylnldrawings towing a part thereof, and it, is tobe under-- stood that any modifications may he made inrthe exact structural details there shown and described, within the scope of the appended claim,

without departing from or exceeding oi the invention.

In the drawings: 1'13. 1. is a vertical,

central through a. ump and motor embodying are h tprovements 01 this invention;

Fig. flisasectionalvlewasmmmkl V on Pie. 1; j v

1 ig .5 isaperlpective view notethesameorsimilaiiparts.

bearings ll withtheuppermotoreap IOisadome-like cap 22 in'which is termed the seat 7 causes "a electon the motor.

m ine 3-3 mgfiisasectionai viewasseen rlai: V

Fig. 418' a iurther sectional view as seen irom line H on Fig. i; a V

, of an agitatorv asc sociated with the pump and forming a detail-o1 the invention;;

Fig. 6 is a fragmentary sectional view of the upper-end of Fig. 1 showing a-slidhtmodiflcation in the invention; 1 1 Fia. l isa sectional viewio'f the parts atthe 'lower'end oi Pig. 1 showing a change in the housin: casting whereby the pump may be used as a submerged type; and

.1 53. s is a horizontal view through 16 .the modified structure of Fig. 7 as seenirom line 8 8 on said Fig.1. v v Ehroughout the several views of the drawings similar reference characters are employed to de- 7 The circulating pump or this invention comprices a motor unit ll mounted above the pump 'unit Ii, and-said units being connected to one another by a housing"; he noted from Fig. 1, use is made oi. a single motor-pump shaft 35 it which is; provided at one end witha reduced portion It and duced portion ll.

intermediate its ends with a re- The reduced-portions ll and I, are respectively disposed in antiirlction bearlugs-ii and II respectively by thenpper 0 cap II and lower capll of the motor housing orunit. Disposed intermediate the housina can! II and II is the stator rind "which supports thestatorparteotthemotor.

Theshaft llhassecuredtoit intermediatethe 5 and II the motor rotor ii.

for the antiirietion hearins II. and through its walls the said domelike cap 22 is provided with a plurality oiaper- I turesji. ,S'ecured to theme I} immediately helowthe bearing II is a fan 2| having its upend cup-shaped as shown at 2!. Projecting iromtheoutermrtaoeoithecupliisaplurality 'of'i'an. blade! I which be' oi the aw illustrated in Hg. 1. and'which have their o edges connected together by a ring 21, or said 2 maybe of the shape illustrated in Pig.

connectina tint.

the lower .wall of the lowercap housing I! and for electing the air throushrthe apertures 23. 'ihiseireulaticnot-theairthmushthemotor is stopped from-conact with the motor windings and upon rotation of the motor, and therefore thefan 24, the collected lubricant is centrifugally thrown from the cup against the inner walls 30 of the cap 22. The lubricant flows down the said walls onto a shelf-like projection at which is an extension of the lower wall of apertures 23,. and the said excess lubricant is thereby directed to the exterior of the motor wherev it may be conveniently cared. for. In the event the bearing iPis lubricated while the motor is stationary and more lubricant is supplied to the bearing than is necessary, the cup will fill and overflow. This overflow is caught bythe upwardly extended lip 32 ofthe shelf II which lies closely adjacent the perimeter of the fan 24, and thesaid lubricant is again disposed of by being directed through the apertures 23, y

In order to conveniently effect a connection of the motor wires with a source of current the upper housing member I8 is provided with a conduit box 33 into which the wire conduit 34 connects and through which the motor wires are connected with the electric current source. The lower motor housing I9 is provided, with a 35 duct 95 closed at its outer end by a lubricating or oiling" coupling 36 whereby lubricant is supplied to the lower antifriction bearing II. The i said lower motor housing I9 is further provided with a plurality of tapped apertures, each in registry with a plane aperture formed in a flange 31 integral with the upper end of the connecting housing i2 and into which registered apertures pass bolts 38 adapted to connect the housing l2 with the motor unit i0.

5 The lower end of the connecting housing i2 formed a plurality of plane apertures in registry with threaded apertures in the upper side of a housing "which forms the pump. housing of the,

pump unit H. In order to connect the lower end of the connecting housing l2 with the pump housing 40 the registered apertures, intheir respective flanges, each receive a cap screw or bolt 4l. Extending through the connecting housing i2 is the motor-pumpshaft l3 which has secured to its lower end the impeller '42. The shaft II is provided adiacentits bearing I! with .a threaded portion 43 for the spanner nut .44. This nut 44 is utilized for securing the inner race to the shaft by clamping said inner race between itself and ashoulder on the motor-pump shaft. Inaddition the spanner nut secures to the shaft just below the 'antifriction bearing l! a splash bailie 45. This splash baifle 45.is in the nature of a flat washer which has its outer edge closely adjacent the inner surfaceof the housing" i2 and'acts -as a centrifugal throw out for spray, moisture, and. the like, rising within thei housing l2. In order v to dispose of this-moisture, spray, and the like, the housing I2 may be provided through its upper flange 31 with one or more apertures 49 through which the said spray, moisture, and the like. is

discharged.

. The pump housing'40 is provided 'at'oneen d' 7c with a flange" having suitable" bolting aperis provided with a flange 39 through which is I I e 2,179,730 The dome-like cap 22 of the motor housing is tures therein whereby the unit may be secured in position adjacent a tank from which the fluid is to be discharged or circulated. The ,flange 41 is connected with the pump housing proper through a connecting sleeve 48 integral at one end with the flange and at other end with the pump housing 40. In addition the pump housing 40 is provided therein with a channel or pas- .pump is discharged.

The connecting housing i2 has depending within the pump housing 40 a sleeve 52 which terminates in a radial flange 53, which flange has its lower surface in line with the upper wall of the housing passage '49, see Fig. 1. The upper surface of the radial flange 59 is likewise in line with the upper surface of, the dischargepipe 5| and the upper surface of the passage 49, again as shown in Fig. 1-. In line with the lower surface of the passage 49 is the upper surface of .a second radialflange 54 which is similar to the radial flange 53, carried by a sleeve 55 extending upwardly from an end plate 56. The radial flange 54, similar to the radial flange 53,'has its outer surface in line with the outer surface of the 'discharge pipe ii and passage 49. From the fore going it will now be appreciated, particularlyas seen in Fig. 1 that the inner surface of the passage 49 and opposed surfaces of radial flanges 53 and 54 form a chamber which may be described as the impeller chamber since the impeller 421s disposed within this chamber.

Each of the radial flanges 53 and 54 is provided with an enlarged aperture 51 and 58 which A form intakes for the impeller chamber. In addition, the flange sleeves 52 and 55 are at their front end cut away as at 59 and whereby communication is had with the connecting sleeve 49 and, therefore, with the intake passage 6| in the From the foregoing it will be noted that the pump unit II is formed of a cast pump housing receiving on one. side the closing cap "and on theother side the end of connecting'housing l2.

The connecting housing 12 and cap 59 have integral therewith the plates which 'cooperate with the pump housing for forming the compression or pressure chamber through which the fluid is passed and placed under pressure fordelivery to thepoint of use. Should, for any reason, trouble develop in the motor housing II, it is only necesit the impeller 62. The impeller is immediately exposed to view and can be readily examined, re-

paired, or'replaced; whereupon the unit is again reassemblem. If, however, the trouble is not with the impeller but-in the pump housing 40, access through the opening just provided by the removal of the connecting housing 12. It will further be noted that there are no nietal-tometal is readily had to the interior of the housing" bearings within the pump housing or connecting housing, or any other bearings within these parts which may be aflected by moisture, grit foreign materials, or the like, that will naturally find its way to the pump.

These pumps are at times used for circulating fluid in which is suspended grit, emery, and the i like, such as when used for circulating the cooling compound of grinding machines and the like. This grit, emery, etc., being heavier than the cooling fluid, will tend to settle on the closing plate at within the sleeve 55. In order to keep this material stirred and suspended within the cooling medium, there has been provided an agitator near the lower end of the shaft. This agitator is illustrated in Fig. 5 and comprises a flat stamping having an aperture Bid at the center thereof, and arms 83a and a projecting therefrom. The aperture 62a is mounted on the end of the shaft it and secured to said shaft by the nut 65 which normally secures the impeller 82 to the shaft. The arms 63a and 34a are then bent downwardly and inwardly to form a material lateral extension of the shaft which, when rotating with the said shaft, eflects a stirring up of any collected material within the sleeve 65. i

It is frequently desirable to provide means exterior of the motor to visibly advise the operator that the unit is operating. Such a mechanism is illustrated in Fig. 6. As shown in this flgure, this mechanism'comprises an extension 88 on the motor-pump shaft it to which is secured an indicator such as wheel 81, this wheel'being secured between a nut 88 threaded on the shaft and a shoulder provided thereon. In this-installation the oiling or lubricating coupling 29 is carried by the shaft instead of the dome cap 22, and oiling ducts 68 are provided in the shaft extension for communicating with the antii'riction bearing it.

The foregoing de cription of the circulating pump related to such a pump when mounted exteriorly of the sump or tank containing the fluid to be circulated. In Figs. '7 and 8 there is illustrated a modified pump body whereby the unity may be adapted for a submerged type of circulating pump; that is. a pump in which the pump body is let down into the fluid to be circulated. The only changes necessary are the elimination of the flange fl and its connecting sleeve 48, and the supplying of apertures I0 through the pump body housing at points above and below the impeller chamber. In this instance the radial flangesleeves l2 and 55 instead of being supplied at their forward ends with apertures 59 and 60 are supplied witha plurality of circumferentially for driving this shaft.

spaced apertures H. Otherwise the construction of the submergedtype of pump is identical with the exterior type.

It should be noted that the pump can be assembled to discharge from either side, that isit can be made to operate as a right or left pump. After the pump has been assembled it can be changed from one hand to the other by merely reversing the motor rotation and the impeller or pump housing. In the latter instance, if the impeller is provided with curved blades instead of straight, then, it will also be necessary to reverse theimpeller relative to the impeller or pump housing. This is possible because the pump housing 40 is provided on opposite sides with threaded apertures for the bolts M and Ma which are of the same size and spacing and may be readily interchanged. From this it will follow that the pump housing may have the connecting housing it secured to either face thereof and the end plate'bfi secured to the remaining face. What is claimed is: In a pump of the class described, the combination of a pump housing of substantially circular contour in a horizontal plane and having an upper and a lower face, a pair of internal spaced, parallel flanges intermediate the upper and lower faces of the housing and projecting inwardly thereof. said upper and lower faces of the housing and internal flanges being provided with a similar circular bore, coaxial with one another, the internal flanges increasing in depth spirally from a point at and around the bore therethrough, interchangeable closure means for said upper and lower faces of the housing. an apertured radial flange carried by each of said closures and respectively disposed in,alignment with the intermediate flanges, said radial flanges and intermediate flanges forming an impeller chamber and a discharge conduit therefor, an impeller in said chamber, a mounting flange and connecting sleeve projecting from the housing and having a supply passage therethrough in simultaneous communication'with the apertured radial flanges for supplying simultaneously the upper and lower sides of the impeller, said internal flanges beyond the point of commencement being connected for forming a discharge port tangentially of the housing and transversely of the supply passage and with its outlet located behind the mounting flange but adjacent thereto, and one of said housing closure means including means for housing a shaft for the impeller and for supporting means EDWARD J. RUTHMAN.

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