US3131877A

US3131877A - Pump

Info

Publication number: US3131877A
Application number: US119216A
Authority: US
Inventors: Hugo F Budzien
Original assignee: Beloit Iron Works Inc
Current assignee: Beloit Iron Works Inc
Priority date: 1961-06-23
Filing date: 1961-06-23
Publication date: 1964-05-05
Anticipated expiration: 1981-05-05

Description

y 1964 H. F. BUDZlEN 3,131,877

PUMP

Filed June 25, 1961 4 Sheets-Sheet 1 INVENTOR. fizz 0f? 31/?(672 ATTORNEYS H. F. BUDZIEN May 5, 1964 PUMP 4 Sheets-Sheet 2 Filed June 23, 1961 INVENTOR. #1 0 2 Bag?! %n a M ATTORNEYS y 5, 1954 H. F. BUDZIEN 3,131,877

PUMP

Filed June 23, 1961 4 Sheets-Sheet 3 MMW A TTORNEYS y 1964 H. F. 'BUDZIEN 3,131,877

PUMP

Filed June 23, 1961 4 s s 4 v 1 WWW A TTORNE YS United States Patent 3,131,877 PUMP Hugo F. Eudzien, Beioit, Wis, assignor to Beloit Iron Worhs, Beioit, Wis, a corporation of Wisconsin File-d June 23, 1961, Scr. No. 119,216 15 Elaims. (1. 241-251) This invention relates generally to fluid compressing apparatus and more particularly relates to a multiple pump construction wherein two centrifugal impellers are disposed in back-to-back relation with a part of the inner shroud of each omitted to intercommunicate the pumping passages, thereby to accelerate the fluid being discharged to increase the pressure of the fluid discharged by the pump through an induced flow effect.

It is further contemplated by the present invention to utilize a sharp-edged separator plate so that the stream of fluid discharged by the pump against the sharp edge will produce a high intensity vibration useful in breaking up lumps in pumping medium such as paper pulp commonly handled by paper stock pumps to move finished stock into the head box area of paper machinery.

It is an object of the present invention to provide a high performance centrifugal pump without increasing normal rotational speeds of the rotary fluid displacement means.

Another object of the present invention is to provide a multiple element centrifugal pump wherein contrarotation is utilized to improve pump performance.

A still further object of the present invention is to provide in a paper stock pump a means for producing a high intensity vibration useful in breaking up lumps in the paper pulp.

A still further object of the present invention is to provide a multiple stage pump having separate rotary fluid displacement means, each driven at a correspondingly diiferent speed.

Many other features, advantages and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description which follows and the accompanying sheets of drawings, in which preferred structural embodiments of pumping apparatus incorporating the principles of the present invention is shown by way of illustrative example.

On the drawings:

FIGURE 1 is a cross-sectional view of a pump taken generally on hne I-i of FIGURE 2;

FIGURE 2 is an end elevational view of the pump of FIGURE 1;

FIGURE 3 is a cross-sectional view showing the principles of the present invention applied to a multiple series staged pump;

FIGURE 4 is a fragmentary cross-sectional view showing a speed chmging means for the driving apparatus as sociated with the multiple pump of FIGURE 3; and

FIGURE 5 is a fragmentary cross-sectional view similar to the view of FIGURE 3 but showing an alternative usage for the multiple pump construction shown in FIG- URE 3.

As shown on the drawings:

The principles of the present invention are generally applicable to any fluid compressing apparatus, for example, superchargers, fuel dispersion, sewage disposal, turbine applications, hydro-therapy, de-freezing and desilting operations and other installations where it is desired to provide a high performance acornpanied by a high output. However, a particularly useful application of the principles of the present invention is made in connection with paper stock handling to be used in pipelines and headboxes. Accordingly, there is disclosed herein an exemplary embodiment of the invention which takes 3,131,877. Patented May 5., 1964 the form of a paper stock pump illustrated generally in FIGURES l and 2 at 19.

More specifically, the pump it) has a two-section casing 11 including a first part 12 and a second part 13 joined together at a flanged joint shown at 14.

The part 12 has a boss 1c in which is formed an inlet 17 adapted to be connected to a source of supply and through which the pumping medium is directed to the center inlet 18 of a shrouded impeller of the centrifugal type shown generally at 19. The shrouded impeller 19 has a plurality of circumferentially spaced radially extending pumping passages 26, each of which having a center inlet portion as previously designated at 18 and a peripheral discharge portion 21. The impeller 19 is mounted on a shaft 22 journaled in a bearing assembly carried by a bearing housing 24 formed in the housing part 12. The bearing housing 24 is closed by a cap member 26. A sealing assembly shown generally at 27 is con tained within the bearing housing 24- inwardly of the bearing assembly 23. a

The housing part 13 has a-hoss 28 in which is formed an inlet 29 adapted to be connected to a source of supply and discharges the fluid into a center inlet portion 30 of a shrouded centrifugal impeller shown generally at 31 and including a plurality of circumferentially spaced radially extending pumping passages 32. Each pumping passage 32 has a center inlet portion as previously designated at 36 and a discharge portion 33 disposed near the outer peripheral portion thereof.

The housing part 11 has an axially projecting portion 34 which is considerably enlarged as at 36, thereby to form a gear box 37. in the aic'ally projecting portion 34 there is located a passage 38 mounting .a pair of bearing assemblies shown at .39 and 49, respectively, and which serve to journal a sleeveatype shaft 41 connected as at 42 to a hub 43 on the impeller 31.

The sleeve-type shaft 41 extends into the gear box =37 and has connected thereto in corotatable assembly therewith a spur gear 44 which meshes with a gear 46 having a hub 47 connected with a shaft 48 rotatably driven by a motor shown generally at 49. The shaft 48 also mounts a sprocket 59 having a row of circumferentially spaced teeth 51 over which is trained a sprocket chain 52,

The end of the shaft 22 has a reduced section 53 carrying a hub 54 of a sprocket 56. The sprocket 56 has teeth 57 which are engaged by the sprocket chain 52, thereby to rotatably drive the shaft 22 in a rotational direction opposite from the sleeve-type shaft 41.

Because the shaft 22 and the shaft 41 are rotatably driven in opposite directions, the impellers 19 and 31 are likewise in contra-rotation.

The two housing parts 11 and 12 together form a single volute pumping chamber 58 into which the fluid from the impellers 19 and 31 is discharged.

It will be noted the impellers 19 and 31 are arranged in back-to-back relationship. Each impeller 19 and 31 has an inner shroud shown at 59 and 60, respectively, and a portion of the inner shroud 59 is omitted as at 61, while a portion of the inner shroud 60 is omitted'as at 62, thereby forming an open section which extends radially inwardly from the peripheral outermost portions of the impellers 19 and 31, which open portions intercommunicate the

pumping passages

20 and 32 of the respective impellers 19 and 31.

Thus, the contra-rotating impellers 19 and 31 produce an induced flow effect which accelerates the discharge of the pump and improves the performance of the pump without increasing the normal rotational speeds required.

It is further contemplated in accordance with the principles of the present invention to dispose a thin plate 63 radially outwardly of the impellers 19 and 31 and preferably in medial register with the open section omitted from the inner shrouds as at 61 and 62. It will be noted that in the embodiment of FIGURES 1 and 2, the thin plate 63 may conveniently be clamped between the flanged portions 14 of the casing parts 11 and 12.

The thin plate 63 is particularly characterized by a A sharp edge 64. Accordingly, the plate 63 functions as a sharp-edged separator plate which divides thetwo flow elements after the induced flow effect. Since the two flow elements are rotating in opposite directions, the plate 63 operates to divide them until they meet at the discharge line, thereby avoiding any hydraulic coupling efiect.

Additionally, the plate 63 developes a function which appears to be a sonic phenomenon in that the direction of a stream of fluid against the sharp edge 64 produces a high intensity vibration. Such high intensity vibration assists in the paper stock pump in breaking up lumps in the pumping medium such as paper pulp. Thus, the pump 10 is particularly useful in moving finished stock into the headbox area while at the same time keeping the fibers Well dispersed. The volute pumping chamber 58 has a common outlet 66 provided at a flanged outlet portion 67 which may be connected to suitable conduit means for'directing the discharge flow to a point of utilization.

Referring now to the pump of FIGURE 3, the prin-, ciples of the present invention are shown applied to a series-staged progressive centrifugal pump. The pump is indicated generally at 70 and includes plural casing sections shown generally at 71, 72, 73, 74, 76 and 77.

' It will be noted from an examination of FIGURE 3 that the

casing sections

71, 72 and 73 form one bank of plural pumping units, while the casing sections 74, 76 and 77 form a second bank of plural pumping sections. Thus, the casing section 71 has an inlet 78, while the casing section 77 has an inlet 79. The center casing sections 73 and 74 have a common outlet 80 flanged as at 81 to facilitate connection to a conduit means for directing the discharge of the pump to a point of utilization.

Each respective casing section forms a volute pumping chamber, for example, the

casing sections

71 and 72

form pumping chambers

81 and 82. The casing sections 73 and 74 form pumping chamber portions 83 and 84 which together with one another form a single volute pumping chamber having the common outlet 80. The casing sections 76 and 77 form

volute pumping chambers

86 and 87. Between adjoining casing sections, there is provided a baflile or partition such as the partition 88 disposed between the

casing sections

71 and 72. The partition 88 has an opening 89-and together with an inwardly extending flange 90 on the casing section 72 forms a passage 91 which directs the fluid discharged from the radial pumping passages 92 of an impeller 93 rotating in the pumping chamber 81 towards the center inlet 94 .of the impeller 96 rotatable in the pumping chamber 82.

The impeller 96 in turn has pumping passages as at 97 which discharge the 'fluid' through an opening 98 formed in a partition 99 disposed between the casing sections 72 and 73 to form a passage 100 leading to the center inlet 101 of an impeller 102. The impeller 102 is disposed in back-to-back relationship with an impeller 103 in the next bank of pump'nnits and as in the arrangement of FIGURES l and 2 the inner shroud of each

impeller

102 and 103 is omitted as at 102a, thereby tointercommunicate the respective pumping passages to produce the induced flow effect which accelerates the discharged fluid. A sharp-edged plate 105 is disposed between the responding casing sections 76 and 77 are likewise similar. Accordingly, like reference numerals have been applied wherever possible to identify like parts.

It is further contemplated in accordance with the principles of the present invention to rotate the respective elements at correspondingly different speeds, depending upon the stage in whichthe pumping units are arranged.

7 To effect that end, a separate driving means is provided for each respective impeller. As shown in FIGURE 3 each

impeller

102 and 103 has a hub portion 104 keyed as at 106 to an axially extending shaft 107. v

Each

impeller

96, 96 has a hub 108 keyed as at 109 V to a sleeve-type shaft 110. It will be noted needle bearing assemblies are employed as at 111 to journal the hub portion 108 of each respective impeller 96 on a portion of the shaft 107. A shaft seal 112 is also provided to prevent leakage between stages along the length of the shaft.

be the same for each bank of pumping units are shown in the fragmentary sectional view of FIGURE 4. Thus, it

will be noted. the shaft 107 extends outwardly through the

other shaft members

110 and 116 and has a reduced portion 120 which is journaled in a bearing assembly 121 carried by a cover member 122 connected to either the casing section 71 or 77. A fastener 123 is connected to,

the end of the shaft 107.t0 form a stop and a sprocket wheel 124 has a hub 126 connected in corotatable assembly with the shaft 107 atthe reduced section 120.

. The sprocket 124 has circumferentially spaced teeth 127 engaging the links of a chain 128. a

' The shaft 110 extends outwardly in concentric relation to the inner shaft part 107 and the outer shaft part 116 and is connected in corotatable assembly with a sprocket wheel 129 having a hub portion 130. The sprocket wheel 129 has a plurality of circumferentially spaced teeth 131 which engage the links of a chain 132. Inwardly of the hub portion 130, there is provided a needle hearing assembly shown generally at 133 to assist in journaling the end of the shaft 110 on the outer peripheral surface of i the inner shaft 107.

casing sections 73 and 74 'and'has a sharp edge 105a The outer shaft member 116 extends outwardly and is also in telescoped relation with respect to the innermost shaft 107 and the intermediate shaft 110. 'A hearing assembly indicated generally at 134 is situated between the outer portions of the casing section 71 or 77 and the end of the shaft 116, thereby to assist in journaling the shaft for rotation. The shaft 116 is also connected to a sprocket wheel 136 having a hub portion 137 and a plurality of circumferentially spaced teeth 138 which engage the links of a chain 139. V a

Each of the chains 128, 132, and 139 are engaged with the teeth 140 of plural gears shown at 141 and carried on a hub 142 connected in corotatable assembly with a shaft 143 constituting a power take-off shaft of a driving means such as a motor 144. While thesprocket wheels 141 may be of the same size, it will be noted there is shown in FIGURE'4 sprocket wheels 124, 129 and 136 which are of diflerent size, thereby imparting a different rotational speed to each of the successive impellers 93,

96 and 102 in the left-hand bank of FIGURE 3 and 103, 96 and 93 of the right-hand bank of impellers. Byvirtue of such provision, the successive stages which are in series 7 can be driven at successive increased speeds, thereby enhancing the performance characteristics of the pump.

The multitude pump arrangement of FIGURE 3 has an unusual utility which is particularly. exemplified in.

FIGURE 5. There it will be noted that by separating the respective banks of pumping units, either one or the other of the banks may be adapted to function as an independent pump. Thus, it will be noted that the casing section 73, for example, instead of being mounted against an adjoining casing section 74 has connected thereto a cover 150 forming with the flanged portion 81 an ordinary pump outlet 151. All of the remaining pumping elements of the pumping units can operate in the customary manner and as previously described. Thus, the same reference numerals have been applied to the same parts in FIGURE 5 as have been used in the description of the pump referring to FIGURE 3.

Although minor modifications might be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.

I claim as my invention:

1. In a pump, two'shrouded centrifugal pumping impellers having radially extending pumping passages opening at a peripheral discharge portion and disposed in backto-back relation, each impeller having an inner shroud with a portion thereof open extending from the outer peripheral extremities thereof radially inwardly to intercornmunicate the pumping passages of the respective impellers, and separate rotating means for driving each respective impeller in opposite directions, thereby to accelerate the flow.

2. In a pump, a casing having two center inlets spaced on opposite axial sides of a common volute pumping chamber and having a common outlet formed for said volute pumping chamber, two shrouded centrifugal center inlet pumping impellers having inner shrouds disposed in back-to-back relation in said volute pumping chamber, each pumping impeller having its inner shroud with a portion omitted near the outer peripheral extremity thereof, thereby to intercommunicate the pumping passages of the adjoining impellers, and means rotatably driving said impellers in opposite rotational directions, thereby to accelerate the discharge flow of fluid pumped by said impellers.

3. In a fluid compressing apparatus, two shrouded impellers arranged back-to-back, each impeller having part of its inner shroud omitted to form an open area between the radial pumping passages of the respective impellers, and driving means having separate driving connections turning said impellers in opposite directions, thereby to accelerate the fluid discharged by the impellers to give a high pressure delivery through an induced flow effect.

4. In a fluid compressing apparatus, two shrouded impellers arranged back-to-back, a casing forming a volute pumping chamber for said impellers and having separate inlets for said impellers and a common outlet for said pumping chamber, each impeller having part of its inner shroud omitted near an outer peripheral portion thereof and in the confronting portion of its inner shroud to form an open area between the radial pumping passages of the respective impellers, and driving means having separate driving connections turning said impellers in opposite di rections, thereby to accelerate the fluid discharged by the impellers to give a high pressure delivery through an induced flow eflect.

5. In a fluid compressing apparatus, two shrouded impellers arranged back-to-back, a casing forming a volute pumping chamber for said impellers and having separate inlets and a common outlet, each impeller having part of its inner shroud omitted to form an open area between the pumping passages of the respective impellers, driving means having separate driving connections turning said impellers in opposite directions, thereby to accelerate the fluid discharged by the impellers to give a high pressure delivery through an induced fiow effect, and a sharp edged separator plate in said volute pumping chamber extending radially outwardly of said impellers to temporarily divide the two flow elements after the induced flow effect occurs.

6. A paper stock pump comprising a casing having a pumping chamber with an inlet and an outlet, rotary fluid displacement means in said chamber to move paper pulp from the inlet to the outlet at increased pressure for discharge in the form of a stream, and a vibratory member comprising a sharp-edged plate in said casing against which the stream is directed, thereby producing a high intensity vibration for assisting in breaking up lumps in the paper pulp.

7. A paper stock pump comprising a casing having a volute pumping chamber, a centrifugal impeller rotatable in said chamber having a center inlet, radial pumping passages and a peripheral outlet in said casing, whereby paper pulp supplied to said inlet is directed radially out of said outlet in the form of a pressurized stream, and a vibratory member comprising a sharp-edged plate in said casing radially outwardly of said impeller against which the stream of fluid is directed to produce a high intensity vibration for assisting in breaking up lumps in the paper pulp.

8. A multiple stage progressive centrifugal pump comprising a pump casing having multiple axially adjacent volute pumping chambers, one of said chambers having an inlet for connection to a source of supply, mother of said pumping chambers having an outlet for connection to a point of utilization, and each chamber therebetween having spacer means forming a passage for conducting fluid from the outlet of the preceding stage and for conducting fluid to the center inlet of the next succeeding stage in a series-staged relation, an impeller in each pumping chamber, a corresponding number of separate driving means including speed-changing means for each impeller to rotate the impellers at diflerent speeds, and a common driving motor for operating all of said driving means simultaneously.

9. A multiple stage progressive centrifugal pump coir prising a pump casing having multiple axially adjacent volute pumping chambers, an impeller in each pumping chamber, one of said chambers having an inlet for connection to a source of supply, another of said pumping chambers having an outlet for connection to a point of utilization, and each chamber therebetwen having spacer means forming a passage for conducting fluid from the outlet of the preceding stage and for conducting fluid to the center inlet of the next succeeding stage in a seriesstaged relation, plural separate telescoping shaft members connected to said impellers and extending outwardly of said volute pumping chambers, a common driving motor and separate driving means connecting each shaft member to said motor to rotate the impellers at different speeds.

10. A multiple stage progressive centrifugal pump comprising a casing having plural series-staged pumping chambers, a centrifugal impeller in each chamber, a common driving motor and plural separate driving means for each impeller comprising telescoping shaft members for each impeller to rotate the impellers at different speeds.

11. A multiple stage progressive pump comprising a casing having two banks of plural pumping chambers with the plural chambers of each bank being in series-staged relation and the last stage of each bank being disposed in adjoining relation to one another, said casing having an inlet for each bank of chambers and having a common outlet for both banks of chambers, rotary fluid displacement means in said chambers for moving fluid from the respective inlets to said outlet, a common driving motor and a separate driving means for each impeller, thereby to controllably vary the operatin speed of each respective impeller.

12. A multiple stage progressive pump comprising a casing having two banks of plural pumping chambers with the plural chambers of each bank being in seriesstaged relation and the last stage of each bank being disposed in adjoining relation to one another, said casing having an inlet for each bank of chambers and having a common outlet for both banks of chambers, rotary fluid displacement means in said chambers for moving fluid from the respective inlets to said outlet, and a separate driving means for each impeller, thereby to controllably vary the operating speed of each respective impeller, said driving means comprising separate telescoping shafts and sleeves and a common driving motor having speedchanging means interconnecting said motor with each said shaft and sleeve, thereby to drive said impellers at different operating speeds.

13. A multiple stage progressive pump comprising a casing having two banks of plural pumping chambers With'the plural chambers of each bank being in seriesstaged relation and the last stage of each bank being disposed in adjoining relation to one another, said casing having an inlet for each bank of chambers and having a common outlet for both banks of chambers, rotary fluid displacement means in said chambers for moving fluid from the respective inletsto said outlet, and a separate driving means for each impeller, thereby to controllably vary the operating speed of each respective impeller, said rotary fluid displacement means in said last stage of each bank comprising a shrouded centrifugal impeller, the inner portion of the shroud of each impeller being omitted to intercommunicate the pumping passages of the impellers, and said driving means operating said centrifugal impellers in opposite rotational direction, thereby to produce an induced flow effect for accelerating the discharged fluid.

14. A multiple stage progressive pump comprising a casing having two banks of plural pumping chambers with the plural chambers of each bank being in seriesstaged relation and the last stage of each bank being disposed in adjoining relation to one another, said casinghaving an inlet for each bank of chambers and having a common outlet for both banks of chambers, rotary fluid displacement means in said chambers for moving fluid from the respective inlets to said outlet, and a separate driving means for each impeller, thereby to controllably vary the operating speed of each respective impeller, said rotary fluid displacement means in said last stageof each bank comprising a shrouded centrifugal impeller, the

inner portion of the shroud of each impeller being omitted to intercommunicate the pumping passages of the impellers, and said driving means operating said centrifugal impellers in opposite rotational direction, thereby to produce an induced flow eifect for accelerating the discharged fluid, and a vibrating member comprising a sharp-edged plate in said pumping chamber of the last stage dividing the flow elements and producing a high intensity vibration to assist in breaking up lumps in the pumping medium flowing through said pump.

15. A multiple stage progressive pump comprising a casing having two banks of plural pumping chambers with the pluralrchambers of each bank being in seriesstaged relation and the last stage of each bank being disposed in adjoining relation to one another, said casing having an inlet for each bank of chambers and having a common outlet for both banks of chambers, rotary fluid displacement means in said chambers for moving fluid from the respective inlets to said outlet, and a separate driving means for each impeller, thereby to controllably vary the operating speed of each respective impeller, said driving means comprising a plurality of sprockets and including separate telescoping shafts and sleeves each connected to a corresponding. shaft or sleeve, and a common driving motor having a power take-01f shaft with a plurality of sprockets associated therewith and chains interconnecting corresponding pairs of sprockets, said sprockets being of difierent size to drive said rotary fluid displacement means at correspondingly different speeds.

References Cited in the file of this patent UNITED STATES PATENTS 214,243 Duc Apr. 15, 1879 743,296 Kugcl et a1. Nov. 3, 1903 1,573,973 Lamontagne Feb. 23, 1926 11,614,409 Surtees Jan. 11, 1927 1,698,287 Westgard Jan. 8, 1929 1,998,778 Gregg Apr. 23, 1935 2,283,434 Halford et a1 May 19, 1942 2,318,990 Doran May 11, 1943 2,321,276 De Bolt June 8, 1943 2,346,032 Kinnucan Apr. 4, 1944 2,394,182 Inglis Feb. 5, 1946

Claims

6. A PAPER STOCK PUMP COMPRISING A CASING HAVING A PUMPING CHAMBER WITH AN INLET AND AN OUTLET, ROTARY FLUID DISPLACEMENT MEANS IN SAID CHAMBER TO MOVE PAPER PULP FROM THE INLET TO THE OUTLET AT INCREASED PRESSURE FOR DISCHARGE IN THE FORM OF A STREAM, AND A VIBRATORY MEMBER COMPRISING A SHARP-EDGED PLATE IN SAID CASING AGAINST WHICH THE STREAM IS DIRECTED, THEREBY PRODUCING A HIGH INTENSITY VIBRATION FOR ASSITING IN BREAKING UP LUMPS IN THE PAPER PULP.