US3762832A

US3762832A - Centrifugal pump

Info

Publication number: US3762832A
Application number: US00231811A
Authority: US
Inventors: J Converse; M Franck; H Heisler
Original assignee: HEISLER MANUF CO
Current assignee: HEISLER MANUF CO
Priority date: 1972-03-06
Filing date: 1972-03-06
Publication date: 1973-10-02
Anticipated expiration: 1990-10-02

Abstract

A centrifugal pump comprising a pump housing in which an impeller is rotatably supported and wherein the impeller is formed with recesses on opposite side faces which are offset from the axis of rotation of the impeller a substantial distance relative to the radius of the impeller so that fluid received from the input ports of the pump will be subjected to substantial centrifugal force resulting in a pump of high efficiency. The recesses formed in the impeller are fluidly connected to an output groove formed about the periphery of the impeller and the housing which mates with output ports.

Description

United States Patent Franck et al. Oct. 2, 1973 [54] CENTRIFUGAL PUMP l,768,24l 6/1930 Ferguson .1 4l5/2l3 T [75] Inventors: Max E. Franck, Waterloo, lowa; Z1322 a zi g fij" 132; Harry F Hem", deceased, law of 3,649,!31 3/1972 Hagemann 415 213 T Sumner, Iowa; by Juliette R. V Converse, executrix, Sumner, lowa Primary j Husar [73] Assignee: Heisler Manufacturing Company, Atwmey carlton et Waterloo, Iowa [22] Filed: Mar. 6, 1972 [57] K P A centnfugal pump compnsmg a pump housmg 1n H PP 231,811 which an impeller is rotatably supported and wherein the impeller is formed with recesses on opposite side [52] us. CL 415/98 415/53 T HS/I99 T faces which are offset from the axis of rotation of the 415/213 impeller a substantial distance relative to the radius of 51 Int. Cl. F0ld 3/02 the impeller that fluid received fmm i1MPOrts [58] Field of Search I I l I I t I 415/97 98 53 T of the pump will be subjected to substantial centrifugal T 1 force resulting in a pump of high efficiency. The recesses formed in the impeller are fluidly connected to an [56] Reierences Cited output groove formed about the periphery of the impel- UNITED STATES PATENTS ler and the housing which mates with output ports. 3,063,673 11/1962 Johnson 415/98 8 Claims 5 niawing gums l ,728,204 9/l929 Falla 415/97 CENTRIFUGAL PUMP BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates in general to centrifugal fluid pumps and in particular to a pump of high efficiency.

2. Description of the Prior Art Centrifugal pumps have been known for many years in which the input port supplies fluid to the impeller adjacent its axis of rotation and the fluid is accelerated by rotation of the impeller and discharge to the outlet port. Such pumps normally must be primed to start them which means that the pump housing must be filled with fluid when the pump is started from a standstill. This requires a substantial amount of power due to the resistance of the fluid as the pump is started. Also, pumps of this type require long impeller blades because of the relatively large distance between the input and output ports of the pump.

SUMMARY OF THE INVENTION The present invention comprises an improved centrifugal pump in which the impeller is rotatably supported in a pump housing and in which the impeller is formed with recesses in its opposite face toward the outer periphery and aligned with inlet passages. A groove is formed about the periphery of the impeller and each of the recesses are connected to the groove by a passageway such that fluid in the recesses will pass through the tubes to the groove due to centrifugal force. A groove is also formed in the housing in general alignment with the groove in the impeller and outlet passageways are fluidly connected to this groove so as to carry the discharge from the pump. Inlet passages are mounted in the face of the housing on either side of the impeller and supply fluid to the recesses in the impeller. The recesses and inlet fluid is supplied to the impeller at a position substantially removed from the axis of rotation of the impeller and thus a substantial pressure will be produced by the pump and also the pump can be started without being primed as is required by conventional centrifugal pumps.

Other objects, features and advantages of the invention will be readily apparent from the following description of certain preferred embodiments thereof taken in conjunction with the accompanying drawings although variations and modifications may be effected without departing from the spirit and scope of the novel concept of the disclosure and in which:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a planview of the pump of this invention; FIG. 2 is a side plan view of the pump of the invention;

FIG. 3 is a sectional view taken on line III-III of FIG.

FIG. 4 is a partially cut-away side view of the impeller; and

FIG. 5 is a sectional view on line V-V of FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a motor mounted on suitable base plates 11 and 12 and which has an output shaft 13 connected to the centrifugal pump 14 of the invention. The pump has a housing 16 which is supported on a suitable base 20 connected to a suitable support. A side plate 23 of the housing 16 is formed with

input ports

18, 19, 21 and 22 as shown in FIG. 2. The end plate 23 is connected to the housing 16 by

suitable bolts

26, 27, 28, 29 and 31.

A rotor 32 is mounted within the housing 16 as shown in FIG. 3 and is locked to the drive shaft 13 by a key 46 which is mounted in a keyway 44 formed in the shaft 13 and the impeller 32. Washers 47 and 48 are mounted in the shaft 13 on either side of the impeller 32 to prevent it from moving longitudinally on the shaft 13. The housing 16 and end plate 23 is formed with

suitable bearings

34, 36, 37 and 38 for rotatably supporting the shaft 13 and impeller 32.

The housing 16 is formed with input ports such as 39,40 and 41 as shown in FIGS. 1 and 3.

The pair of

output ports

42 and 43 are formed in the housing 16 and are fluidly connected with a groove 61 formed in the housing 16 about the periphery of the impeller 32. The impeller 32 is formed with a groove 51 which aligns with the groove 61 in the housing 16.

As best shown in FIGS. 3, 4 and 5, a plurality of recesses 53 are formed on a'frrst side of the impeller 32 adjacent the outer periphery thereof and passageways 52 extend from each of the recesses 53 to the groove 51 formed about the outer periphery of the impeller. The recesses 53 are separated by partitions 71. A second plurality of recesses 56 are formed on the second side of the impeller 32 and are separated by partitions 72 from each other. Passageways 54 extend from the recesses 56 to the groove 51 about the periphery of the impeller 32.

It is to be particularly noted that the

recesses

53 and 56 are formed adjacent the outer periphery of the impeller 32 and that the

input ports

18, 19, 21 and 22, 39 and 41 are positioned so as to supply fluid to the

recesses

53 and 56, respectively.

The fact that the

recesses

53 and 56 are positioned a substantial distance from the shaft 13 insures that the maximum centrifugal force will be applied to fluid within the

recesses

53 and 56 as the impeller 32 rotates and a pump of high efficiency results.

In operation, the inlet conduits 18, 19, 21 and 22, 39 and 41 are connected to a suitable inlet fluid supply and the outlet conduits, 42 and 43, are connected to a suitable outlet system. It is to be realized that although only three inlet conduits are illustrated on the left side relative to FIG. 1 of the housing 16 that generally the same number of inlet tubes will be connected to both sides of the housing of the pump. The motor 10 is started to drive the impeller 32 and as fluid is supplied to the inlet tubes it will be distributed in

inlet header grooves

76 and 77 formed in the housing 16 and the cover plate 23 adjacent the

recesses

56 and 53, respectively, and the inlet fluid will be furnished to the

recesses

53 and 56. The impeller32 will subject the fluid to high centrifugal force due to the rotation of the impeller and the fluidwill pass from the recess 53 through the passageway 52 to the

grooves

51 and 61 and out the

outlet tubes

42 and 43. Simultaneously, fluid will pass from the

inlet tubes

39 and 41, the header.46, into the recesses 56, through the passageway 54, to the

grooves

51 and 61 and out the

output conduits

42 and 43.

A pump constructed according to this invention operates without being primed and produces a very high head. The groove 51 serves to relieve pressure in the pump.

The outer periphery of the impeller 32 has a rim 80 as shown it is seen that this invention provides a pump of novel characteristics and although it has been described with respect to preferred embodiments it is not to be so limited as changes and modifications may be made therein which are within the full intent and scope as defined by the appended claims.

We claim as our invention: 1. A centrifugal pump comprising: a housing formed with inlet and outlet ports; I an impeller with a drive shaft rotatably supported in a said housing; said impeller generally disc-shaped and formed with i a first plurality of depressions formed on one side thereof and which are spaced a substantial distance from the axis of rotation and said depressions fluidly connected to an inlet port; and a first plurality of passageways extending from each of said depressions to the rim of said impeller, an outlet recess formed between the rim of said impeller and said housing and said outlet port fluidly connected to said recess. 2. A centrifugal pump according to claim 1 wherein said impeller is formed with a second plurality of depressions formed on the second side thereof and spaced a substantial distance from the axis of rotation, a second inlet port fluidly connected to said second plurality of depressions, and a second plurality of passageways extending from said second plurality of depressions to said outlet recess.

3. A centrifugal pump according to claim 2 wherein said first and second plurality of depressions are positioned offset from each other.

4. A centrifugal pump according to claim 3 wherein said first passageways are formed partially in partitions between said second plurality of depressions.

5. A centrifugal pump according to claim 4 wherein said second passageways are formed partially in partiand fluidly connected to said outlet recess.

Claims

1. A centrifugal pump comprising: a housing formed with inlet and outlet ports; an impeller with a drive shaft rotatably supported in a said housing; said impeller generally disc-shaped and formed with a first plurality of depressions formed on one side thereof and which are spaced a substantial distance from the axis of rotation and said depressions fluidly connected to an inlet port; and a first plurality of passageways extending from each of said depressions to the rim of said impeller, an outlet recess formed between the rim of said impeller and said housing and said outlet port fluidly connected to said recess.

2. A centrifugal pump according to claim 1 wherein said impeller is formed with a second plurality of depressions formed on the second side thereof and spaced a substantial distance from the axis of rotation, a second inlet port fluidly connected to said second plurality of depressions, and a second plurality of passageways extending from said second plurality of depressions to said outlet recess.

5. A centrifugal pump according to claim 4 wherein said second passageways are formed partially in partitions between said first plurality of depressions.

6. A centrifugal pump according to claim 2 comprising a plurality of inlet ports formed in said housing on said one side of said impeller and fluidly connected to said first plurality of depressions.

7. A centrifugal pump according to claim 6 comprising a second plurality of inlet ports formed in said housing on second side of said impeller and fluidly connected to said second plurality of depressions.

8. A centrifugal pump according to claim 2 comprising a plurality of outlet ports formed in said housing and fluidly connected to said outlet recess.