US865504A - Centrifugal high-pressure pump. - Google Patents

Description

No. 865,504. PATENTED SEPT. 10, 1907.

' G. LAGER.

GENTRIFUGAL HIGH PRESSURE PUMP.

APPLICATION FILED MAY 26, 1904.

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(aw/ll I GENTRIFUGAL HEGHPRBEQSURHPUMP.

APPLICATION FILED MAY 26, 1904.

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UNITED STATES CARL LAGER, OF BALDWIN SVILLE, NEW YORK.

CENTRIFUGAL HIGH-I RESSURE PUMP.

Specificationof'Letters Patent.

Patented Sept. 10, 1907.

Application filed May 26, 1904. Serial No. 209,898

'l o all whom it may concern:

,Be it known that I, GARL'LAGEn, of Baldwinsville, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in-(lentrifugal High-Pressure Pumps, of which the following, taken in connection with the accompanying drawings, is a-full, clear, and exact description.

This invention relates to improvements in centrifugal high pressure pumps in which'the liquid is'drawn and "forced through a succession of ,pumpingrnnners with cumulative force so that itmaybe elevated to high altitudes or against considerable hydrostatic pressure without excessive speed of the runners. In this class of pumps it is imperative that the walls of thewate'r passagcs, and particularly those of the inclosing shell or casing where the impact of the liquid is greatest should be as smooth as possible so as to reduce to a minimum the incidental friction and consequent loss of powei and force. This is accomplished by carefully borirg or 'milling the walls oi the passages and it is found that it canbe more easily and perfectly done by making .the inclosing shellin separate substantially annular sections, one for each runner, which are'secured together end to end and are comparatively narrow so that the interiors are easily accessible for boring or milling tools;

One of my objects, therefore, is to build the shell'in sections secured together end' to end and to make the parts'of the pump and to enable intermediate sections substantially identical and interchangeable so that the capacity or size of the pump may be readily increased or diminished by the addition or removal of one or more intermediate sections and a corresponding number of runners. In carrying out this object itbecomes necessary'to make thediaphragrns between the runners separate from the case sections, and also separate from each other so'that they also may be more perfectly and smoothly finished to complete the passage 'ways from one runner chamber to another.- The primary object, however, of these separate diaphragms, which are' also identical and interchangeable, is to facilitate the work of asseinbling the it to be readily and easily enlarged or reduced to meet different work require ments to correspond to the changes in the number of case sections and runners. I

In any centrifugal pump where the water is received into the runner from one side, there is always an end pressure on the runner towards the opening, which pressure is equivalent to the area of the inletopening, multiplied by the pressure, which will produce an end thrust in the direction'towards the opening in the run-. ner. In a four-series centrifugal pump, as shownflby the drawing, there will be an end thrust on each runner, dependentupon the pressure it produces. The total changeable, v a central annular inlet opening end pressure due to all the runners, whether two or more, will, however, 'be equal to the sum of the pressures upon all the runners multiplied by the area of the inlet opening. I

My object is to provide means to counteract, as far as practicable, thisexcessive end thrust bya counteracting water pressure against the front or inlet side of the first runner so that the pressure at both ends of the series is effectively balanced? -A further object is to provide means whereby the severalrunner bearings are simultaneously lubricated from a single source of supply.

Other objects and uses will appear in the following description.v v

In the drawings-Figure 1 is a top plan of a centrifugal high pressure pump embodying the various features of my invention. Figs. 2 and 3 are sectional views taken respectively on lines 22 Fig. 2. of one'oi the detached intermediate shell sections and one of the diaphragms, the runner being shown in" place in Fig. 4. Fig. 6 is an enlarged sectional ti'eyv ,Fig. l, and 3 3,

- through the driving shaft and adjacent portions of the diaphragms and runners showing the lubricator conduits. Figsv 7 -and '8 are detail views of modified forms of uniting the diaphragms to the case sections. Fig. 9 is a sectional view of a modified connection of the pressure balancing conduit. I I

The inclosing shell or casing consists essentially of a series of cast metal rings or sections, in this instance four, which may be designated as an inlet section 1-; intermediate sections -"2- and 3 and an outlet section 1, all of which parts are secured to.-

gether end to end by suitable clamping means; as bolts 5 the section lbeing provided with an inlet nozzle -6- which is detachably' secured thereto and discharges-centrally into its front end, while the discharge section -4 is provided with a peripheral volute conduit 7. having a discharge nozzle 8.

' The interior of the shell is divided transversely by a series of transverse diap'hragms or partitions 9, 1Q,

and 11, for forming a series of compartments or runner chambers 13, 14, 15 and 16, in which are movable a corresponding number of rotary pumping runners -l7 Figs. 4 and 5 are end elevations respectively 18, 19'- and 20- alternating with the diaphragms -9, -10 -and 1 1 and keyed or otherwise removably secured 'toa rotary driving shaft 21 These runners,;with the exception of the one nearest the inlet, are'identieal in construction, and are therefore 'inter-' and each consists of a circular disk having -22 iacing the inlet nozzle'and e iitending radially thrnugh the periphery "oi the runner for forming an annul dr'water-way which the meeting faces of the shell sections irrespective of the means by which the case sections are secured together, and are each provided with a central annular waterway 2 fat oneside of the meeting ends of thecase sections opening at the side or the diaphragm toward the discl'iarge end of the shell. and extending radially through the periphery of the diaphragm. the radial water-way being divided by transverse parti- 1-5 tions or involute vanes 2,5 for the purpose of preventing the vertical motion of the liquid as it is dis charged from the runners. I

The interior chambers of the shell sections l-, 2- and 3- are provided with annular waterways 21 which are arched outwardly or semi-circuhu in cross section and the periphery of the inlet portion of the diaphragm is also semi-circular in cross section and concentric with the cross sectional contour of the annular enlargement -2S- for forming a transverse passage connecting the peripheral discharge of one runner with the peripheral inlet or the next adjacent diaphragm so that the liquid entering the inlet nozzle ---f$--- is drawn into the inlet -22 of the first runner and is discharged "by centrifugal force through the water-way --28- of the shell section -l.- from which it is diverted through 3 in the shell section -4- into the volute conduit -7- the water-way in the diaphragm 9-;-- into the inlet of the next runner, and so on through the succession of runners and diaphragms until it is finally discharged from the last runner -20 through a passage 29* and out through the discharge nozzle 8-.

It'has been previously,stated that the (iiaphragms 9 10 and l.'l are held rigidly in place between the meeting faces of the shell sections -l--'-, 2 and -3, and in order that this may be accomplished in as simple a manner as possible l provide each of the diaphragms with an annular rib or flange e 30-" which is fitted in an annular recess -5l in the meeting face i of one of the disks, seen in Figs. 2 and 4 so that when the meeting faces are clamped together the rib 2lfl is 0 same'clamping bolts which clamp the shell sections together, or the annular rib may be secured to onc of the shell sections by suitable me screws fi2----. as seen in Fig. 8. The manner of securing the-. c diaphragms in place is,' howeverv iinnniterial. theessential object being, to construct the diaphragm separate from the shell st tionsso that the watt-r passagcs in both the shell sections and diaphragms may llf, more perfectly finished and more easily and readily assembled than if the diaphragins were formed integral with the shell sections. or if theshcll sections were formed intcgral with each other.

The rotary pumping runners are held a definite disdiaphragms.v

In assembling the various parts of the pump the shaft f2l-- is inserted in a suitable hearing 33 i in tile inlet nozzle it afterwvhich the shell section 1 is tlicn placed ovcr the other cnd of the shaft and niovcd cndwis into cngagcment with the nozzle section -45 to which it is clamped by suitable means, as bolts 538. 'lhe ptnnping runner 'l7- is then slipped over and upon the shaft until it abuts against a shoulder *37 with its inlct '*22--- registered with the outlcl oi' the nozzle. '(lne of the eves 35 is then placed upon and moved along the shaft 21 until it engages the first runner ]7-. after which the diaphragm il is similarly moved lengthwiseof the shaft. upon its spacing sleeve 35 adjacent. to the runner w l7 with its annulaiyrib "5(lseated in the groove or rcte .--i lin the adjacent lace of the shell The shell section 2; runner l8 and diaphragm lO are then successively placed in position. as seen in Fig. 2. to form the second pumping element. and in like man nor the sholl section 3. putn p runner -'l9 and diaphragm, ll-- are successively placed in position, and finally the runner -20 and end shell'section are placed in operative posit ion. the meeting faces ofsaid shell sections being clamped together by the bolts -5 as each pumping element is completed.

The method here proposed to balance the end thrust of the shaft and runnerseries is to admit a counteracting pressure of water from the high pressure chamber or discharge conduit: of the last runner against the inlet end or face of the first runner through a suitable conduit as.-40- and pressure distributing ring 4lhaving an inlet -42 and an annular chamber 43-. The conduit 40 is shown as having one end con nected to the volute conduit. 7- and its other end connected to a passage in the suction nozzle f5- which passage connects with the passage 42. in the ring or annulus 4l the conduit -40- having a valve -44 to control the pressure. in the annular chaniber-43-- in the ring 4 l; and thereby produce the balancing effect to a nicely. The ring --4l.- is secured between the meeting ends of the section .--l' and nozzle fiand is inclosed by flanges "45 on the adjacent face of the first runner which flanges have a close running fit with the ring to rcduce lealtage'at the joint, and the area of thc annular groove -4.lis proportioned to keep the water pressure tip to counteract the op 'iosing pressure at. the opposite end of the runner series.

ln l ig. i-- l have shown the means for simultas noously lubricating all of the runner bearings which mcans consist of a main passage 45 formed in the longitudinal center of the shaft, ---2land provided with branch passages 41f,- which communicate with the bearings-- 34*; one end of tho pass-ago {l5- -l)3lll section -l connected bya conduit. -47---- to an oil-chambcr 18* .on the end section 4" the lulnicator being-supplied to said chamber from a reservoir 49 'lhis end of the shaft .is preferably thrcadcd and protrudes it short upon this threaded-end arc inountod clamping nuts 50 and distance beyond the runncr- !f) and The construction and operation of my invention is now believed to be sufiiciently clear to enable any one skilled in theart to make, construct and use the same.

,lHaviulg thus described my invention what 1 claim and desire to secure by Letters Patent is 1. In a series'runnercentrifugal pump, a series et' separate annular case-sections one for each runner and means securing them end to end, each caseseclion having: an annular waterway arched transversely, separate circular diaphragms interposed between and held by the meeting faces of the se-sections dividing the interior of the case into runner ambcrs and each provided with a water passage leading from its periphery inwardly through one of its end faces, and a runner in each chamber having its inlet eonununicnting with the waterway in one of the diaphragms and its outlet opening into the waterway of it c' 'ection, said runners having their'inlet openings all facing in the same direction, and an external conduit connecting the waterway of one at the case sections with the inlet side of one of the runner, chambers and discharging against the inlet side of the first runner oi the series.

2. in a serics-runuer centrifugal pump, a series of separate annular case-sections one for each runner and means securi hem end to end, each case-section having; an

annular 'ary arched transvers 1;, separate circular diaphrae, int rposed between and held by the meeting .nicating with the inlet side of said first runner for balancing the end thrust. I

.L in a centrifugal high'pressure pump, a casing comprising; an inlet section and an outlet section and intermediate sections, said sections being secured ond to end, the intermediate sections being identical and interchangeable, each section inclosing an impeller chamber, and having an annular water-passage, a series of impellers in said chambers each delivering into the passage of the so section which incleses it, and a series" of partitions forming the sides of ad acent impeller chambers, each partition being, clamped between the meeting ends of the adjacent case sections and having a waterwvay commuthe water-way in one of the case-sections, and delivering into the next adjacent impeller, and a conduit leading from the annular passage of one of the case sections and discharging against the inlet side of one of the impellers.

In witness whereof I have hereunto set my hand this 16th day of May 1904.

. CARL LMJER.

Witnesses IL E. CHASE, llUWAltl) l. lhixlsox.

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