US1494614A - Rotary pump - Google Patents

Description

May 2a, w24. 1,494,614

' P. MCLEAN ROTARY FUMP Filed sept. 5 m?? /Z I @Honnef Patented May 20, '1924.

UNITED kSTATES PETER Mensen, or WELLAND, curante, CANADA." j

e i ROTARY PUMP.

Application led September 5, 1922. SerialNo. 586,284.

To all 'whom it may concern.:

Be it known that I, PETER MCLEAN, a subject ofthe King ofGreat Britain, residing-,at Te/Velland, in the Province of ntario and Dominion of Canada, have invented certain new. and useful Improvements in a Rotary Pump, of which the following is a specification.

This-invention relates to an improved type of rotary pump, designed to prevent entrance of air into thefpump under working of the same.

The primary object ofy this invention is the provisionfof a durabletype of `rotary .pump including an improved rotor arrangement whereby a liquid is drawn into a stator and forced toward alglandfend` of the same under pressure so that ythe liquid may have anexit from-the stator adjacent the gland end of the stator, and thereby` preventing entrance of air through the gland end to the stator. i

A further object of the-invention is the provision of an improved means for supporting the rotor in pumps.

Other objects and advantagesof this invention will be apparent during'the course of the following detailed description. y

In the accompanying drawing, forming a part of thisspecilication, andlwherein similar reference characters designate vcorresponding parts throughout the several views Figure 1 is a longitudinal cross sectional view, taken through the improved pump arrangement, and showing cooperating details thereof. i .l .i f

Figure 2 is a transverse ycross sectional view, taken substantially on the line 2--2 of Figurel. i fr i Figure 3 is a transverse crosssectional view, taken substantially on the line 3 3 of Figure 1. j

Figure 4. is a fragmentary plan view of the improved pump, showing in particular the stator arrangement thereof.'

In the drawing, wherein for the purpose of `illustration is shown but the preferred embodiment of this invention, the letter A designates Vthe improved pump f arrangement which embodies` a support arrangement B; stator C; and rotor D. i

Referring to the statory arrangement C, the samef'i'ncludes a housingflO which is preferably rectangular in exterior formation and is provided with a cylindrical straight bore 1.1 therethrough.` t Inlet and outlet openings 16 and lajfrespectively are preferably provided through the housing l0 adapted to receive inlet and outlet pipes 12 and 13 respectively, `said pipes being disposed adjacent opposite ends of the housing 10. The` end 15 is provided `for the housing yl() adapted for detachable connection to the end of said yhousing adj acent its l,inlet opening 16 and the` pipe 1 2 which cooperates in said opening 16. `This Y. end 15 is provided with a cylindrical shaped A extension 17, upon the inner portion there- 19l extending peripherally about the cylinder inserting portion 17 and `which is adapted for overlying the outer marginal end of the housing 10k adjacent thefinlet pipe `12. A gasket 2O is preferably` provided for cooperation intermediate the iange portion 19 and the outer marginal end surface of the housing 10. A plurality of bolts 21 are preferably provided for connecting the end 15 to the housing 10. A portion 22 may be provided extending outwardly of the part of of which is adapted for snugfitting in the bore 11 of the housing 10,' a flange portiony the attaching end land is provided'with a j socket depression 23 opening inwardly and aligning axially with thek bore 11 of the housing 10, 4and in which the extreme end 24 of the rotor shaft`25 is adaptedvfor bearing. An anti-friction bearing `is `preferably provided in this depression 23, which may be in i the form of a ball bearing 26 seatedin arcuate depressions 27 and 28l in the facing end surfaces of the shaft 25 and socket depression23. For lubricating purposes, a detachable screw or bolt' member 28-is preferably provided, extending laterallyand `radially through the proj ectingfportio'n 22 of the end `15, and whichincludes a non-leak washer connection 29, whereby `lubricant `may be j fed into thesocket opening23 through the opening 30 in which said detachable screw member 28 cooperates.

A head 32 is preferably `provided upon theopposite end of the housing 10 andwhich has a bore 33 extending axially therethrough into which the shaft 25 extends and in whichthesame bears. The end 32 is counterbored and provided witha packing gland 35, whereby the connection of `the shaftl 25 with the bore 33. may be renderedlleak proof.

,Tliehead member 32 is preferably provided with a ringv shaped portion35y which is adapted for cooperation vin thev rotor arrangementD inra mannerto be subsequently setfforth. A portion 36` of the end 32 litsinto the housing bore l1 in snug relation, so that the iiange portion 37 of the end 32 overliesthe end surface of the housing 10; a gasket 38 cooperating intermediate the facing surfaces of the flange 37 and the housing 10 to provide a non-leak connection. Y

Bolts 39 are preferably provided for attachment of the end 32 to the housing 10. The gland 35 may be attached in the end 32 as by the adjustable nuts 41. i Referring to the rotor arrangement D, the

`shaft 25y is a art thereof, and as before stated has a dea end 24 thereof bearing within the socket depression 23 of the stator end 15. An end 42 of said shaft 25 extends ex- "teriorly of the head 32 of the stator C and bears in a babbitt bushing 43 of a standard 44. The'rotor member 45, which extends longitudinally in the bore 11 of the stator housing 10 is of novel formation, and includes the cylindrical portion 46 provided with the longitudinal bore 47 through which the shaft 25 extends. Tapered passageways 49 and. 50a are respectively provided in the portion 46 of the rotor 45 and the shaft 25, which are adapted for receiving a tapered locking pin 51, whereby the rotor 45 may be connected to the shaft 25 for rotation therewith. The rotor 45 furthermore-.includes a plurality of spiral shaped blades 50 which extend about the casing portion 46 and are disposed in overlapping relation. Thus, it can be seen that the rotor 45 is of the worm or screw' type with the blades `5() thereof relativelyv formed on an overlapping pitch. The end of the rotor 45 adjacent the head 32 of the stator C, is preferably provided with an annularseat 53 in which the inwardly extending collar 35a of the head 32 seats, to have an additional safeguard against seeping of liquid exteriorly of the stator C.

The rotor 45 when disposed within the chamber 11 of the housing 10 provides a chamber or compartment intermediate the facing surfaces of the rotor 45 and the end member 15 which extends a-nnularly about the shaft 25. The inlet opening 16 and the pipe v12 communicate with this compartment 70, so that during rotation of the rotor 45, the liquid or other material may be drawn into the compartment 70 so that the same may flow between all of the passageways intermediate :adjacent spiral blades 50. Similarly a compartment 71v is annularly provided about the sleeveextension 35a intermediate the facing surfaces of the rotor 45 and the head 32. The outlet opening 16',L as well as the outlet conduit 13 communicates with the compartment 71, whereby liquid may be supplied to the compartment 71 from all of the passageways intermediate the blades 50 of the rotor 45,

and thereby the liquid in said compartment 71 may flow into the outlet conduit 13.

The stator C includes the base 60 upon which the supporting blocks or pillars 61 rest a-nd through which the bolts 62 extend 67 may be provided upon the shaft 25, being loosely disposed thereon intermediate the sleeves 68, which are keyed to shaft 25.

During operation the thrust incident to drawing and forcing of the liquid through the stator C will be uponk the end arrangement 15 of the stator C, and in particular upon the anti-friction bearing 26. This bearing 26 in the smaller type of pump ymay be a single ball bearing, although it is` `preferred in the larger pumps, that a ring of thrust bearings be provided. In view of the fact that the end 15 of the pump A is solid and supports the extreme end 24 of the shaft 25, therein in the dead end bearing, thereis little likelihood of leak or seepage of air in the stator housing 10 incident to sucking force of the blades 50. The course of the liquid will be more particularly directed to the head 32 of thepump A, and thus the pressure upon said head will be from the interior of the stator A, `so that it will be seen that noair `whatsoever can enter from this head 32.

From the foregoing description of this invention7 it can be seen that a very durable and eectv'e type of` rotary pump has been provided, in which the parts thereof so cooperate during operation that there is practically no likelihood of entrance of air for mixture with a liquid'being pumped. The desirability of such arrangement can be well understood by those versed in the art to which this invention pertains.

Various alterations in the shape, size and arrangement of parts may be made to the form of the invention herein shown and described, without departing from the spirit of the invention or the scope4 of the claim.

I claim: v

A rotary pump comprising a cylindrical casing open 'at its end and adjacent one end having aside port for the admission of fluid and adjacent its other end having aside port for the outlet of fluid, a head closing one end of said casing and having a socket leading from its inner face exteriorly of the casing, a shaft extending into the casing through the other end thereofand having an end portion rotatably fitting in the pocket of said head, a rotor mounted upon said shaft to turn with the shaft and positioned in the casing with one end terminating in spaced relation to the inner face of said head, the other end of said rotor having an annular pocket about said shaft, aclosure head for the second open end of Said casing fitting about said shaft with its inner face in spaced relation to the end of the rotor, the second head being provided with an an nular sleeve fitting about the Shaft and exing socket.

tending into the pocket formed in the yend portion of said rotor, the last mentioned ead being provided with a packing receiving pocket leading from itsy outer face about the shaft, and a packing gland for compressing packing inv the packing receiv- PETERl MCLEAN.

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