US2511660A - Sectional casing gear pump - Google Patents

Description

June 13, 1950 R. B. wILsoN SECTIONAL CASING GEAR PUMP 3 Sheets-Sheet l Filed Jan. 25, 1946 Wn? m @is w is O Si@ Q f/ O IN VEN TOR. RALPH B. WILSON ATTCI RN EYB June 13, 1950 R. B. wlLsoN SECTIONAL CASING GEAR PUMP 5 Sheets-Sheet 2 Filed Jan. 25, 1946 HVVENTOR. RAL PH 5 W/Lso/v [A le mi ATI'D RN EYB June 13, 1950 R. B. wlLsoN sEc'rIoNAL cAsING GEAR PUMP 3 Sheets-Sheet 3 Filed Jan. 25. 1946 INVENTOR. RALPH B. W/Lso/v ATI'CI RN EYE Patented June 13, 1950 This inventionrelates .to.la.. rotary gear pump and more particlularlyto a pump wherein the motorsl areiinicenta'ct withfeachxotherflatfallztimes thereby increasing the pullingpow'erof'ithe lpump.

An object if :this invcntiorrgistogprovide a pump that `will operate at a low speed, will eliminate vibration to a considerable -degree jandby setting `Vthe `f rotors closer, "back 'slippage is L eliminated thus providing apositive drive orlpull;

"'Thisepump is designed to-pei'mit each-chamber to =.carry a -full Vloazd'canxi:the center :rotor chambers will ll and `.dis.charge twice in one revolution, thus "giving the if'llaction of two rotors and this added to lthefour strokeseof-zthe end rotors:provide.,sixteen'fpowerstrokes per rev- `olutionirra:three.rotor vacuumgpump. Y

'Vibration-1in the rotors isspragcticaliyeliminated as each chamber has constant pressure at al1 times in a revolution. There are only three moving parts in the pump which adds to the eiciency of the pump and makes for economical operation thereof. By the use f a few moving parts, springs and valves are eliminated no adjustments are required and adjustment of the vacuum within the pump is controlled by a direct drive with a. variable speed motor.

With the above and other objects and advantages in view the invention consists of the novel details of construction, arrangement and combination of parts more fully hereinafter described claimed and illustrated in the accompanying drawings in which:

Figure 1 is a perspective view of the sectional housing of an embodiment of the invention;

Figure 2 is a perspective sectional view of the pump assembly;

Figure 3 is a, cross sectional view of the pump on the line 3-3 of Figure 4;

Figure 4 is a sectional view on the line 4-4 of Figure 3;

Figure 5 is a sectional view on the line 5--5 of Figure 4 and Figure 6 is a sectional view on the line 6-6 of Figure 4.

Referring more in detail to the drawings the reference numeral I0 designates the pump casing which comprises the intermediate rotor section I2, an inlet section I4, an outlet section I6 and end or face plates 'I and I1 all of which are secured in unit assembly by means of bolts or similar fasteners I8. n

The inlet end section I4 is formed with a substantially open chamber 4 and a threaded boss 20 is provided on the upper end which provides an inlet connection communicating with the charnbei-14. fThesendfsection IGrisprovidedawithafsuiz stantially .open chamber .24 :and an internally threadedsfboss 2.21onxthe upperendfof theisection provides an 1 outlet: connectionv for theipumpfnvith the ..connection communicating with .a :chamber 2.4.. Agear chambernBSfis provided inztheouter endtof-theisection..;|6. l

'.The'inner lwalls of i .the section f1.4.. aree-provided Iwith; inlet ports ...Z6 and Ithe, inner wall'. of thesection Midis lprovid-ed Iwith .outlet @ports cmhich communicate 4with y the :respective inlet and rout- Alet ports '3D and 82 in the intermediatersection IZ and the `latter ports ncommunicate :with 'the rotor mhambers `34, and .38 respectively,

. .fForrnediin each ofl the-sections I4zandft6. are

'the rcircular f walls 48 forming pockets .42 infvvhich .are :mounted z'roller bearings 4'4 in which shafts 2.48, i413 :and :56 .-.are journalled, .shaft 48 extends beyond the casing I 0 to function as a drive shaft and a gear 52 secured to shaft 48 meshes with gears 54 mounted on shaft 46 and 50, to cause rotation thereof when .power is applied to shaft 48. The gears are mounted in the section I 6 which is extended at 5I to form the gear housing 53.

On each shaft is mounted a rotary vane member 56 having four varies 58 and four pockets 60 formed intermediate the vanes 58. The vanes of one rotor extend into the pockets of the other rotors in the conventional manner and the vanes are in close contact with the pockets at al1 times.

Arcuate shoulders 62 are formed on the rotary vane members adjacent the base of the vanes while the pockets are formed at the base of the vanes on the side opposite the shoulders.

The pump has a positive drive through shaft 48 and rotation of the vanes draws the air, gas or liquid through the ports into each succeeding chamber to discharge at the next port giving maximum efficiency. Theeffciency of the pump may be attained at relatively a low rate of R. P. M. and the pump will operate as a force pump for air, gas or liquid, as a suction or vacuum pump, as a supercharger, as a turbine or can Ibe operated by steam as a power unit.

The pump works on a clock-wise principle or it may .be reversed as desired.

It is believed that the operation and construction of the pump will be apparent to those skilled in the art and it is to 4be understood that changes may be made in the details of construction, arrangement and combination of parts without departing from the lspirit Iof the invention or the scope of the appended claim.

Having thus described the invention, what is section having an inlet connection communicatfy ing with the chamber therein and the outlet end section having an outlet connection communicating with the chamber therein, the said outlet end section having a gear chamber in the outer` end thereof, bearings positioned in the said bearing pockets of the end sections, a centrally disposed driving shaft journaled in the Ibearings in thesaid intermediate bearing pockets and extended through the said intermediate rotor section, said shaft having an extended end projecting from one end of the housing providing driving Imeans for the pump, upper and lower rotor shafts also `journaled in the bearings in the upper and lower I bearing pockets and extended through the said intermediate rotor section, said upper and lower rotor shafts spaced from and parallel to the said centrally disposed driving shaft, meshing gears on the said shafts positioned in the said gear chamber for driving the said upper and lower rotor shafts from the said centrally disposed driving shaft, rotors having radially disposed vanes mounted on the said shafts and positioned housing section, said rotors having longitudinally 'disposed pockets in the outer surfaces between the vanes and positioned to receive the edges of yin meshing relation in the said intermediate the vanes of coacting rotors, said intermediate section having communicating cylindrical chambers therein in which the said rotors are positioned, said end sections having walls in the inner ends thereof and the walls of the said end sections having upper and lower openings therethrough with the openings in the wall of the inlet en dsection diagonallvpositioned across the longitudinal center of fthe pump, and the open'- ings"of the wall of theoutlet end section also diagonally positioned across the longitudinal center of the pump and opposite to the openings 'inthe-wall of the inlet end of the pump. whereby uid is drawn into the intermediate 'rotor' section from opposite sides of the rotors at ,the inlet end ofthe pump and discharged from opposite sides of the rotors in the outlet end of the pump.

RALPH B. WILSON.

REFERENCES CITED The following references are of record in the ille of this patent:

UNrrEDfsTATEs PATENTS

Images