US2440912A - Jet motor pump unit - Google Patents

Description

May 4, i948. J. R. PARKER JET MOTOR PUMP UNI'T med oct. 19, 194e 4 sheets-sheet 1 &\

[NEN TOR.

I May 4, 1948.

u J. R." PARKER 2,440,912

JET MOTOR PUMP UNIT Filed Oct. 19, 1946 4 Sheets-Sheet 2 X0/57V 1Q. PAQ/@EQ INVENTOR.

May 4, 1948. .1. R. PARKER JET MOTOR PUMP UNIT Film1` oct. 19, 1946 4 sheets-sheet s A rra/@N5 y If lilla' N May 4,A 1948. J. R. PARKER JET MOTOR PUMP UNIT 4 Sheets-Sheet 4 Filed Oct. 19, 1946 Arroz/vnf Patented May 4, 194s QMIEDSTATI-:s

JET MOTOR PUMP UNIT John B.

Food. Machin,

Parker, Southgate, Calif., assigner to Corporation, a corporation of Delaware San Jose, Calif.,

Application October 19. 1946, Serial No. 704,520

E '5 Claims.

This invention relates to well pumps and particularly jet well pumps.

Jet pumps are commonly used for pumping water from wells up to 120 feet in depth. The installation of this type oi pump includes a motor pump unit located at the surface of the ground, a jet unit generally located below the water level in the well, an eductlon pipe leading from the It is common practice to make an offset connection between the motor pump unit and the eduction and pressure pipes in the well. instances, however, the pump house is provided directly over the Well and-here it is much more elcientto have the motor pump unit directly over the well. Heretofore separate types oi pump drawings in which:

Fig. l is a sectional view of an oset jet motor pump installation showing a preferred embodiment of the motor pump unit of the invention in side elevation.

Fig. 2 is a sectional view ofan over-the-Well" `jet motor pump installation pump unit and showing the tion.

Fig. 3 is an enlarged diagrammatic fragmentary sectional view oi' the jet unit shown in the installations of Figs. 1 and 2.

Fig. 41s an enlarged sectional view of the motor pump unit of the invention taken on the line fil-t of Fig. 5.

Fig. 5 is a horizontal sectional view at reduced scale taken on the line 5 5 of Fig. 4.

Fig. 6 is the horizontal sectional view taken at reduced scale on the line @-6 of Fig. 4.

Fig. 7 is a vertical sectional view oi reduced scale taken on the line l-i of Fig. 4.

Fig. 8 is a sectional view illustrating an overthe-well installation of the motor pump unit of the invention employing a packer type Jet unit.

accompanying including said( motor latter in front eleva- (ci. 10a-s) Fig. 9 is an enlarged fragmentary detail sectional view of the connection between the packer jet unitand the motor pump unit and is taken on the line 9-9 in Fig. 6.

Fig. 10 is a similar sectional view taken on the line illiii of Fig. 6.

Referring speciically to the drawings, the invention is therein shown as embodied in a motor be employed as part of 6 shown in Fig. 1 or in shown in Fig. 2, or ln an inn stallatlon i8, shown in Fig. 8.

The motor pump unit i5, see Figs. 4, 5, 6 and 7, includes a pump baseBi which is adapted to rest on a pump house floor of any of these three installations, and a motor screws 23, and a motor 2t which rests on the motor base 22 and is secured thereto as by cap 20 screws 25.

The pump base 2i is formed of a single casting in which are integrally incorporated an impeller and a box 32. The bowl 30 provides an impeller chamber 33 from' which a 25 central intake hole 36 opens downwardly and a discharge hole 35 opens peripherally. The chamber 33 has a spiral channel 36 formed radially therefrom (substantially throughout the periphoi a discharge nozzle 38, the passage 31 being spirally shaped and constantly increasing in cross section.

The skirt 3i is, for the most with the axis of the bowl 3 als.

and it, at its top and bottom edges. The upper edge of wall il also conforms to and is integral into either of these.

with the nozzle 38 so that the nozzle passage 31 extends through this wall.

The internal wall 41 thus divides the space within the box 42 into an educticn chamber E and a pressure chamber P. The intake hole 34 in the impeller bowl 30 connects the impeller chamber 33 with eduction chamber E. The discharge end oi the nozzle 38 lies at a central point in the pressure chamber P so that the peripheral discharge hole 3i and the spiral passage 31 of the nozzle 38 connects the impeller chamber 33 with the pressure chamber P.

Bosses 50 in the upper wall 40 which extend downwardly and unite with other structural elements as shown in Fig. 5, provide threaded apertures for receiving the cap screws 2 To strengthen the pump base 2l, a reinforcing web is cast integral with the skirt 3|, the bowl Cast integral with the wall 48 is a heavy plate 52 which is approximately square with rounded corners, this plate having formed therein a vertical threaded eduction pipe hole 53 and a vertical threaded pressure pipe hole E4. and 54 are in opposite corners of the plate 52 and the other two corners oi the plate 4have provided therein threaded holes 55 one oi which is opposite the eduction chamber E and is kept from opening into this chamber by a boss 56 formed integral with the bottom wall 48 and extending upwardly therefrom into the eduction chamber E.

The outside vertical ilat box wall 42 is provided with bosses $0 and 8| in which are formed respectively a horizontal eduction pipe hole 82 and a horizontal pressure pipe hole 83. The holes 53 and 62 are oi the same'diameter and similarly threaded so that an eduction pipe may be screwed The holes 84 and 63 are of the same diameter 'and similarly threaded so that a pressure pipe may be screwed ,into either of these. A screw plug B1 is provided for closing one of the holes 58 and 82. Another screw plug 88 is provided ior closing one of the holes 54 and 63.

A horizontal wall l0 which forms the top oi the box 32 is thickened where it covers this box and has a boss witha threaded aperture therein for receiving a pressure gauge 1|, this gauge indicating the pressure of iiuid in the pressure chamber P.

Also cast integrally with the wall 40 and extending upwardly therefrom is the body oi a pressure regulator 18. The body 15 drical chamber 11 from which a threaded hole 18 opens horizontally. Screwed into the body 15 so as to connect a pressure switch tube 13 with the chamber 11 is a terminal fitting 80. Formed in the wall l0 coaxially with the chamber 11 is a hole 85 having a valve seat 88 pressed therein. The regulator chamber 11 opens upwardly and actuated diaphragm unit 81, carrying a valve 88 and yieldably pressing the latter into closing relation with seat 88, is suitto `an upper face oi the body 16 the open upper end of the chamber ably secured so as to close The hole 18 receives a threaded nipple 80 which connects a hose 3| to the regulator valve chamber 11. Screwed into a suitable threaded hole provided in the wall 4| is a terminal air check valve 92 which connects the eduction chamber E to an air line 33.

The motor base plate |00 which 22 includes a horizontal cover secured by the cap screws 23 u wm aus 2| to cover the has a cylin-` The holes 53 vrespectively into impeller chamber 33. This plate |00 has a seal |0| which is located concentrically with respect to the impeller chamber 33 and may be of the stunlng box type as shown in Fig. 4, or it might be oi' any of the other Well-known types oi' liquid seals for rotating shafts. The motor 24 has a shaft |02 which extends through the seal |0| and has iixed on its lower end, within the impeller chamber 33, a pump impeller |03. This impeller has an intake neck |04 which extends downwardly into the intake hole 3l of the pump.

The pipe 13 is connected to a suitable pressure switch ||0 which is adapted to be set so as to start the motor 20 whenever the pressure in the regulator chamber 11 decreases below a given minimum value and stop the motor 24 when this pressure rises above a given maximum value.

In each of the installations of the motor pump unit I5 the hose 9| connects to a closed water storage tank I l, from which Water is adapted to be withdrawn througha service pipe H2.

The tank has a float type of air volume control unit ||3 to which the air line 93 connects.

As above noted, the motor pump unit i5 is adapted to be employed in either of three types of Jet pump installations I8, l1 and |8. Installation I6 is what is known as an offset jet pump installation and installations l1 and I8 are what are known as over-the-well" installations. The motor pump unit I5 is adapted to be employed in any of these three installations of these two types with equal facility, without a change in the motor pump unit and without any impairment of the emciency of the latter.

In an offset installation such as the installation I6 shown in Fig. 1, the motor pump unit l5 is connected with a jet unit |20 in a well casing I2| by means of an eduction pipe |22 and a pressure pipe |23. These pipes make quarter turns through elbows |24 and |25 respectively and are screwed respectively into the horizontal eduction pipe hole .62 and pressure pipe hole 83 of the motor pump unit i8. Before connecting up the motor pump unit I5 with the jet unit |20 in installation I8 therefor the removed from the holes 82 and 83 and are screwed the holes 83 and 54.

The iet unit |20 is oi a type well known in the art and it is believed the structure and operation of this is clear from the sectional view thereof in Fig. 3. This by water being supplied under pressure through the pressure pipe |23 to a iet nozzle |23 from which a iet of water is discharged into a Venturi tube |29 the upper connects with the eduction pipe |22. surface of through a strainer |30 and normally surrounds the nozzle |28.

When the installation I6 is operating, therefore, water from the well is constantly sucked upwardly into the Venturi tube |29 by this iet and the high velocity of the iet is converted into suillcient pressure, by the expanding cross section of the Venturi tube, to lift the water up the eduction pipe |22 into the eduction chamber E oi the pump unit I5 from which it is withdrawn by the pumps rapidly rotating impeller |03.

Water thus drawn into the impeller chamber 33 is discharged through the channel 38, hole 35 and passage 31 of the nozzle 38 into the pressure chamber P. Until the pressure builds'up in this chamber sulllciently to open water thus delivered to the pressure chamber P is Vall returned through the pressure pipe |23 to plugs 81 and 88 are responsive switch I I0 which is equivalent to the amount sucked in from the well by the jet unit |20. The water thus passing the valve 88 ows through the hose 9| into the tank II I. f

As the level of water in the tank rises, it compresses the air in the tank thus placing the water under increasing pressure. When this pressure has reached a desired maximum, the pressure shuts off the motor 24. Drawingwater from the tank III through the pressure and the switch I'IU starts the motor 2t to build up the supply of water in the tank I l I.

Where the pump house and an over-the-well" installation of the motor pump unit- I5 is desirable. this is effected by using the plugs 61 and 68 to close the -holes 62 and 63, and the eduction and pressure pipes |22 and |23 are screwed directly into the vertical holes 53 and 5t in the box 52. The operation of the installation I7, with the unit I5 connected with the eduction and pressure pipes in this manner, and with the plugs 6l and 68 transferred to the holes 62 and 63, as shown in Figs. 4 and 6, is exactly the same as in the installation I5 described herein above.

The over-the-well installation I8 shows the motor pump unit I5 assembled with what is known as a single pipe over-the-well assembly. This assembly, which makes it possible to employ the jet principle in wells otherwise too small in diameter, includes the well casing I 30 itself and a jet unit I3I which is suspended in t-he casing |30 at the lower end of an eduction tube It?. Provided on the lower end rubber packer |33 which closes off the space b'etween the unit the space between the two may be used as a pressure pipe. An adapter |35 receives the upper end of the .casing |30 and has a stuillng box |36 which makes a liquid tight connection witn the casing.

This adapter has connecting flanges I t@ at its upper end by which it is secured to the plate 52 of the motor pump unit l5 by cap screws Il| (see Fig. 9). The adapter |35 has a threaded hole M5 which is concentric with the packing gland |36 and into which the upper end of the eduction pipe |32 screws. The adapter also has an oiset hole Ill which connects the pressure hole 54 of the motor pump unit I5 with the upper end of the well casing ISI) when the adapter |35 has been secured to the plate 52 as shown in Figs. 9 and 10. Assembling the adapter on the pump unit in this |135 of the adapter 53 of the pump unit. Thus the with of supplying separate types of motor pump units for over-the-well" and offset jet pump installations. Without adding to the cost and without requiring any kit of parts and' tools for is directly over the well of the unit I3I is a` I3l and the casing |30 so that eiliciency of operation of the motor pump unit for either of these types of installation.

The air volume control unit II3 contains a valve which connects with the upper end of the tube 93 and which is opened by float F of this unit when the float is lifted by the water in tank III rising above a. given maximum leve-l. vWhen this occurs, air is admitted by the unit ||3 to the tube 93 and this is drawn by the pump through the check valve 92 and into the water flowing to the pump through the eduction chamber E. Whenthis water is discharged from the pump through the nozzle 38 into the pressure chamber P, the air contained therein separates out from the water, rises to the top of chamber P, and passes out through pressure regulator 16 and into the 'tank I I I. This increases the amount of air in the upper end of the tank and lowers the oat F so as to again shut oi the valve in the unit I I3 aration chamber is not necessary and that the provision of an outlet in the upper wall 40 of the pressure chamber P just back of and above the nozzle 38 facilitates the separation of the air from the water in pressure chamber P and the discharge of this air from said chamber through the pressure regulator 'I6 and into the water tank vI I I.

the air separating function formerly requiring a high dome.

Iv claim:

1. In a motor pump unit adapted for use in a jet pump installation by being connected to a jet unit in the well by eduction and pressure pipes, the combination of: an impeller bowl; a skirt integral with said bowl for supporting said bowl; a water passage box integral with said bowl and said skirt, said bowl having an impeller chamber and a central intake hole and a peripheral discharge hole, said holes communicating with said chamber, said box being formed by a bottom wall adthe upper level of said skirt, an internal vertical by extending said skirt laterally from said bowl impeller chamber; a liquid seal on said base concentric with said impeller chamber;

a jet pump installation by being connected to a iet unit in the well by eduction and pressure pipes, the combination of: an impeller bowl; a skirt integral with said bowl for supporting said bowl; a water passage box integral with said bowl and said skirt. said bowl having an impeller chamber and a central intake hole and a peripheral discharge hole, said holes communicating with said chamber, there being a spiral channel formed radially from substantially the entire periphery o said chamber and connecting with said peripheral opening, there being a spiral passage connecting with said discharge hole and forming a continuation of said channel with a constantly increasing cross-section, a pressure chamber being formed in said box into which said spiral passage opens, an eduction chamber being formed in said box which connects with said central intake hole, vertical pressure and eduction holes being formed in the bottom of said box and opening downwardly respectively from said pressure and eduction chambers, horizontal pressure and eduction holes being formed in an outside wall of. said box to open laterally respectively from said pressure and eduction chambers; a motor base secured to said bowl and closing said impeller chamber; a liquid seal on said base concentric with said impeller chamber;r a motor mounted on said base with its shaft extending through said seal into said impeller chamber; and an impeller mounted on said shaft within said impeller chamber.

3. In a motor pump unit adapted for use in a jet pump installation by being connected to a jet unit in the well by eduction and pressure pipes, the combination of: an impeller bowl; a skirt integral with said bowl for supporting said bowl; a water passage box integral with said bowl and said skirt, said bowl having an impeller chamber and a central intake hole and a peripheral discharge hole, said holes communicating with said chamber, said box having eduction and pressure holes opening downwardly for an over-the-well installation and eduction and pressure holes opening laterally for an offset installation, there being passage means in said box connecting both of said eduction holes with said intake hole in said bowl, and passage means in said box connecting both of said pressure holes with said peripheral discharge hole in said bowl; a motor base secured to said bowl and closing said impeller chamber; a liquid seal on said base concentric with said chamber; a, motor mounted on said base with its shaft extending through said seal into said chamber; and an impeller mounted on said shalt in said chamber.

4. In a motor pump unit adapted for use in a jet pump installation by being connected to a iet unit in the well by eduction and pressure pipes.

of'. an impeller bowl; a skirt insaid bowl; a water passage box integral with said bowl and said skirt, said bowl having an and a central intake hole and a peripheral discharge hole, said holes communicating with said chamber, said box having eduction and pressure holes opening downwardly for an over-the-well installation and eduction and pressure holes opening laterally for an oiset installation, there being passage means in said box connecting both of said eduction holes with said intake hole in said bowl and passage means in said box connecting both of said pressure holes with said peripheral discharge opening in said bowl; a motor base secured to said bowl and closing said impeller chamber; a liquid seal on said base concentric with said impeller chamber; a motor mounted on said base with its shaft extending through said seal into said impeller chamber; and an impeller mounted on said shaft within said `impeller chamber.

5. In a motor pump unit adapted for use in a jet pump installation by being connected to a jet unit in the well by eductlon and pressure pipes, the combination of: an impeller bowl; a box formed integrally with'said bowl; a Wall dividing the interior of said box into eduetion and pressure chambers said box having a horizontal outside wali and a vertical outside wall common to both of said chambers, said bowl having an impeller chamber anda central intake hole and a peripheral discharge hole, said. holes communieating with said impeller chamber, said intake hole also communicating with said eduction chamber, and said discharge hole also communicating with said pressure chamber, therebelug eduction and pressure pipe connecting holes in said horizontal box wall. opening respectively into said eduction and pressure chambers. and eduction and pressure pipe connecting holes in said vertical wall, opening respectively into said eduction and pressure chambers; a motor base secured to 'said bowl and closing said impeller chamber: a liquid seal on said base concentric with said im'- peller chamber; a motor mounted on said base with its shaft extending through said seal 4into said impeller chamber; and an impeller mounted on said shaft within said impeller chamber.

JOHN R. PARKER.

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