US2020956A - Pumping unit - Google Patents

Description

Nov. 12,1935. NORLING- 2,020,956

PUMPING UNIT Filed Dec. 5, 1932 2 Sheets-Sheet 1 719 by W I g ATTORNEY} Nov. 12, 1935. R, 'A, NORLING 2,020,956

PUMPING UNIT Filed Dec. .5, 1932 2 Sheets-Sheet 2 INVENTOR.

WW. ML,

M'TW

ATTORNEY;

I Patented Nov. 12, E935 I tune Reinhold A. Hurling, Aurora, ilk, assignor to lindependent lneumatic Tool 6a., Chicago, H3... a corporation oi fielatvare Application December 5, 1932, Serial his. M51345 7 Qlaims. (@l. hit-=8?) This invention relates to pumps, and more particularly to a portable power driven pum ing unit adapted to be lowered into a pit, trench, basement or other receptacle for pumping water or other liquids therefrom.

The general purpose and object of my invention is to provide a self-contained pumping unit in the nature of a tool capable of being handled and used as such and yet rugged and sturdy in its construction to withstand the heavy duties imposed on pumping devices of this character in outdoor and other construction and building work.

Other and further objects of my invention are to provide a pumping unit driven pneumatically, as by a compressed air motor; to prevent pressure fluid leaking from the motor about the pump shaft entering the'purnpv casing to render the pumping element air bound; to make the stuifing box for the pump shaft accessible for adjustment from the exterior of the tool; to provide a regulator on the pump device. for the throttle valve so that the speed of the motor may be regu- 4 lated to the desired rate of discharge of water from the pit to prevent wasting of the air and excessive wear on the motor and the pump; to have the exhaust for the motor discharging upwardly to prevent disbursing the water at the intake for the pump at the lower end of the unit; to close the exhaust outlet by a check valve to prevent water entering the motor" to stop the same; and to provide a check valve on the discharge side oithe pump to prevent flooding of the pit through the pump when the motor is stopped. The invention consists further in the matte hereinafter described and claimed.

In the accompanying drawings:-- Fig. 1 shows the pump device of my invention in its position or use in a pit 'or trench.

Fig. 2 is anenlarged sectional view of the pump device taken longitudinally through the same;

Fig. '3 is a vertical sectional view, with parts in elevation, taken on line 3-3 of Fig. 2;

Figs. 4 and 5 arefhorizontal sectional views tails of construction to be hereinafter described;-

Flg. 8 isabottom planeview o! the pump primer; and 4 Fig. 9 is a horizontal section taken on line I of Fig.2. v

The pump device 'of my invention, as shown in the drawings, comprises, generally three axially alined and secured together pump motor andcontrol valve sections, whereby the device is a section.

self-contained unit or tool capable of being lowcred as such into a pit or trench l, as shown in Fig. l, for pumping water therefrom. The upper or top section 2 of the device is the control valve section and is provided with an eye 3 whereby 5 the handling rope or cable may be connected with the device for lowering and suspending it in the pit.

The motor section i which is the intermediate oi the sections is equipped with a fluid pressure motor 10 for rotating the pump in the lower or pump section v t. The motor, as shown in Figs. 2 and 5, is oi the rotary type having a rotor 8 provided with radial slots '5 in which operate blades ,8 forming the piston elements of the motor. The blades work against the inner surface of the rotor chamber 9 in which the rotor is eccentrically mounted. Chamber d has inlet ports w on one side and exhaust ports H on the other. as shownin Fig. 5.

The exhaust ports open into an exhaust chamber it provided by the outer casing 4 of the motor Chamber l2 opens into an exhaust manitold l3 extending upwardly therefrom to the top of the pump device where the manifold'is equippedwith a downwardly seating gravity closing check valve l4, as shown in Fig. 3. Valve I4 is guided by a stem l5 slidably fitting in a support I 6 which isin the form of a cross-piece open on both sides for the escape of theexhaust.

The control section 2 is provided at its upper end with a tapped inlet passage I! to which the compressed air supply conduit or hose I8 is attached as shown in Fig. 1. A throttle valve'in the form of a turning plug is is fitted in said passage and controls the flow oi pressure fluid 85 therethrough. The stem 20 of the valve projects outside of the-casing section -2 and is equipped with a control handle or regulator 21 carrying a. spring pressed plunger 22 co -operable with a series of apertures 23 to hold the valve in any or a 4 number 01' adjusted positions. These apertures. as shown in Fig. '7, are arranged along the arc of movement of the outer end of the handle and are disposed between stops 24, 24 which imit the extent of movement of the handle to full ope and 4 full closed positions or the valve. The ape es may be provided in the casing comprising the sec tion I, the latter having a web for the purpose asshowh inFlgJ.

The regulator construction shown and described. enables the throttle valve I! to be set at the posltion desired to regulate the speed or themoton'and thus the speed of the pump which it'actuatcs. Thus, the valve maybe set'to reg- 'ulatethcpumpspeedaccordlngtotheseepageld into the pit where the pump is used, preventing themotor from running idle when the seepage is slow and saving air and wear on the motor. Moreover, with the regulator carried by the pump device, it is accessible to theworkman in the pit, and thus the motor speed may be readily andeasily controlled to keep the water in the pit at a pre-determined height without undue racing of the motor.

The check valve l4 closes the upper end of the exhaust manifold l3 and prevents water getting into the motor should the pump be completely submerged when in use. as is likely to occur. when first lowering the pump into the pit. The mani- 4 fold pointing and discharging upwardly and being at the extreme upper end of the device prevents the exhaust gases leaving the manifold from disturning the waterat the inlet end of the pump, which inlet end, to be presently described,

is at the extreme lower end of the unit.

Live air is admitted to the motor from the inlet I! through passages whichconnect the inlet chamber 26 at the valve l9 with a chamber 21 at the bushing 28 for the governor controlled valve 29. Bushing 28 opens into a supply passage 30 serving the inlet ports In of the rotor chamber. The opening and closing movements of the valve 29 are automatically controlled by a spring 3| and a governor device 32 rotated by the rotor 6 and acting on the valve through a lever 33 as shown.

The rotor 6 is. provided with a shaft extension 34 extending into the pump section 5 and connected with the pump shaft 35 in that section bya coupling element 36. The pump shaft is journaled in the section 5 in a bushing 31 and an anti-friction bearing 38, respectively. The bearing 38, which is of the ball type hoIds the pump shaft 35 from endwise movement.

Bearing 38, as shown in Fig. 2, is supported in a stufling box housing 39 slidably fitted in the pump shaft housing 5 and held in place against a shoulderor seat '48 by a spacing sleeve 4|. The latter also holds the ballbearing 38 in place, and fits between the upper end of the housing 39 and bottom'plate 42 of the rotor chamber. The housing 39 isfltted with a packing material 43 fltting about the pump shaft 35 below the.

bearing 38 to prevent water entering the motor from the pump housing and also to prevent air or pressure fluid leaking from the'motor into the pump casing to interfere with the pumping action of the pump. The packing material 43 is compressible through a nut 44 screwed into the lower end of the stufllng box housing and having an engageable head with slots or openings 45. as shown in Fig. 2.

The nut 44 may be reached for-adjustment through an opening 46 in the pump housing 5. This opening, asv shown in Fig. 4, is disposed between two of the longitudinally extending ribs or webs 41 on the outer side of the pump 'housing. A cover 48 is provided for the opening, the cover fltting against the outer side of the pump housing and having hook shaped portions 49, 49 at its side edges to fit over the webs and slidably support the cover thereon. A screw 58 carried by the cover andengageable with one the stumng box structure may beireached for adjustment without taking anything apart. The

' side of the pump housing 53.

opening 46, as shown in Fig. 6 is disposed directly opposite the head of the nut.

The cover 48 prevents shavings, pieces of rope and other articles which may be in the water in which the pump unit operates,- from getting 5 impeller is connected to the pump shaft 35 by a 5 taper fit and a key. as shown in Fig. 2. This makes the impeller rigid with the pump shaft and causes it to run true with said shaft. The impeller as shown in Fig. 9, has upper and lower circular plates, between which are vanes 54 which go'- as the impeller is rotated draw liquid into the impeller through its intake 55 and discharge the liquid from the periphery into the housing 53, the latter surrounding the impeller and provided with an upwardly directed discharge opening 56. 5 I

The intake 55 is formed by a circular flange 51 depending from the lower plate of the impeller. Surrounding this flange is a loosely fitting wear-bushing 58, the latter being held'in place by the primer 59 through a bolt 68. The bolt 30 is engaged with the pump shaft 35 and when tightened clamps the primer 59 against the lower end of the bushing 58 and seats the upper edge of the bushing against a shoulder on the lower plate of the impeller about the flange 51, as

shown in Fig. 2.

A packing ring 6| engages the outer side of the bushing 58 to prevent leakage from the in- The packing is filled in a groove in the cover plate 62 for the 40 lower side of the pump housing, said plate being secured to the pump housing by bolts, one of which is shown at 63 in Fig. 2. Cover plate 62. is provided with an upstanding annular flange 64 surrounding the periphery of the impeller to 5 prevent gravel and dirt taken in with the water from collecting around the bushing 58 to cause excessive wear of the same.

The primer 59, as shown in Fig. 8, is in the form of a casting having a fluid passage 65 there-. a through in constant communication with the intake 55 of the impeller. At one side of this passage is a downwardly extending scoop 66 which serves in the rotation of the pump to deliver water to the impeller through its intake 55 55 for priming the pump. After the water level drops below the cover plate 62, air enters the pump through its intake 55. The primer, however, extending below the impeller, is still" in the water and having the scope, forces the water a of my invention and permits operation of the pump even when the intake 55 is above the water level in the pit.

Surrounding the primer is a screen 61 for the purpose of preventing stones and other articles entering the pump. The screen flts between the cover plate 62 and a base plate 68 which covers the pump inlet. Plate 68 is secured to 7 plate 62 by the bolts 63, the upper plate having 9. depending boss or lug 69about each bolt tospace the plates apart as shown.

A discharge fitting 181s fitted to the impeller casing is at its discharge port 56 and is equipped u I through the pump to flood the pit when the motor the like.

is not running. As the pump shown is capable of raising water as high as feet, thedischarge pipe l2 connected to the fitting 10 is substantially two inches in diameter and considerable water would flow back into the pit except for the use or the checkvalve.

The construction shown and described pro" 1 vides an efiective and eiflcient pump device for iumping, water from pits, trenches, basements and The device b a self-contained unit, capable of being handled as such in use. I

The primer automatically primes the pump and moreover supplies water thereto even when the water level in the pit drops below the intake opening of the impeller. Thus, the pump may be used to remove seepage from a trench or pit, the pump speed being adjusted through the setting of the valve control to that necessary to remove the seepage. With the valve control on the pumpdevice, it is accessible to the workman in the pit,

V and thus the pump speed may be adjusted to accord to the desired rate of discharge from the pit.

The opening 35 in the pump housing 5 has the dual purpose of permitting access to be had to the stufing box for adjusting it to prevent leakage of water from the pump into themotor casing and also to vent the pump housing should air ,ing After the bushing has worn down to a certain extent, the pump is likely to function. improperly due to the escape of water about the bushing and its packing from the high pressure side of the pump within the casing to the low pressure side at the intake opening at. in terieres with the intake or water to pump, and with the bushing and packing replaceabie this condition may be readilyend easily rectified Whenever it occurs. It will be noted that the bushing to is reieasably fastened in place through the primer by the bolt St. The packing may be replaced by releasing its holding ring it; which is fastened to the cover 62.

The details of construction shown and use scribed may be variously changed and modified without departing from the spirit and scope of my invention.

I claim as my invention:

g l. A portable pumping unitoi the character described, comprisinga housing and a pumping assembly at its lower end and a motor assembly for operating the pump adjacent the upper end of the housing, and a shaft journaled in the housing between the motor and the pump and providing a driving connection between them, a stu'fling box in the housing for the shaft, said box having an outer casing slidably fitted in the housing about the shaft, an anti-friction bearing for the shaft carried by saidcasing, and means fitted in the housing between the motor and the stuiflng box to hold the bearing in the casing and the casing in the housing.

2. A, portable pumping. unit of the character described, comprising a pump assembly at the lower end oi the unit, said pump assembly having a casing and a rotary impeller therein, said casing having a discharge port, said impeller having flange means extending downwardly through an opening in the bottom wall of the casing and providing an intake port for the pump, a motor in- 5 cluded in the unit for operating the impeller, a primer for the pump located below said intake port, said primer having a scoop and a fluid pas sage to serve said intake port, and means for securing the primer to the impeller by clamping it 10 against the outer end of said flange means. i r

3. A portable pumping unit of the character described, comprising a pump assembly at the lower end of the unit, said pump assembly having a casing and a rotary impeller therein, said 15 casing having a discharge port, said impeller having flange means extending downwardly. through an opening in the bottom wall of the casing and providing an intake port for the pump, a motor included in the unit for operating the impeller, 20 a primer for the pump consisting of an annular member fitting over the intake port below said flange means, said primer having a scoop and a fluid passage to serve said intake port, and a fastening member extending axially through said 25 intake port and engaging the primer and the impeller for securing the primer to the impeller by clamping the primer against said fiangerneans.

a. A portable pumping unit of the character described, comprising a pump assembly at the at? lower end of the unit, said pump assembly having a casing and a rotary impeller therein, said cas-= ing having a discharge port, said impeller having flange means extending downwardly through an opening in the bottom wall of the casing and 35 providing an intake port for the pump, a motor included in the unit for operating the impeller,

a primer for the pump consisting oi an annular member fitting over the intake portbelow said flange means, said primer having a scoop and a 41 fluid passage to serve the intake port, meansfor seeurln the primer to the impeller, and a housing for the primer secured to the rig below the same, said housing having upper .ud lower plates secured together in vertically spas l relation, and a screen fitted between said about the primer, said upper plate having tion fitting about the opening in the bottom of the pump casing and engaging and ing the flange means of the impeller. 11'

5. A portable pumping unit of the described, comprising a housing, a rotary pump the lower end of the housing and a pneumatically operated motor at the upper end of the housing,

a shaft journaled in the housing between the motor and the pump and providing a driving connection between them, said housing havinga chamber surrounding the shaft between the motor and the pump, said housing having an opening in its outer well connected with said chamber, a so cover slidably mounted on the housing over said opening by having hooked shapedportions at the sides of the cover engaglng over outwardly projecting longitudinal ribs on the housing on opposite sides of said opening, said cover having 65* ing a discharge port, said impeller having an annular flange providing an intake port for the impeller and extending downwardly through an t opening in. the bottom wall of the casing, a

motor included in the unit and connected with the impeller for operating the same, a packing assembly for said flange at said opening and ineluding a removably mounted wear bushing fltting about and in engagement with said flange, a primer for the pump located below said flange, and means releasably securing'the primer to the impellerfor rotation therewith, said means securing the primer against the wear bushing for clamping the latter against the impeller.-

7. A portableipumping unit of the character described, comprising a pump assembly at the lower end of the unit, said assembly having a casing and a rotary impeller therein, said casing for the pump located below said flange, and 10 means releasably securing the primer to the impeller for rotation therewith, said means passing through the intake port as provided by said flange and securing the primer against the outer end oi. the wear bushing ior clamping the latter-15 against the impeller.

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