Патент USA US2401079код для вставки
May 23, 1946- 2,401,079 1.. D. JONES ET AL CENTRIFUGAL DEAERATOR ‘ ~ Original Filed July 4, 1942 1161i w 16 51316.2, IN m m.m Leo D. Jones John lSQ’I'eH. BY W M ATTORNEY Patented May ‘28, 1946 ' - 2,401,079’ _ " A UNlTED STATE s2,401,079PATENT ' orsics CENTRIFUGAL DEAERATOR Leo D. Jones, Philadelphia, and (John J. Serrell, Wynnewood, 'Pa., assignors to The Sharples Corporation, Philadelphia, Pa., a corporation of Delaware Original application July 4, 1942, Serial No. 449,830. Divided and this application ‘July 19, 1943, Serial No. 495,262v 2 Claims. (Cl. 183-25) In the preferred form of the invention, the The present invention pertains to a centrifugal . centrifugal deaerator consists of a non-rotating apparatus for deaerating liquids.- It will be de other applications. 0 tank around the interior surface of which the oil ?ows in a rotating motion during its passage ‘from entrance to exit of the tank in a longitudinal scribed for purposes of illustration and conven ience in relation to the ‘lubricating system of an aviation engine, since that is the purpose for which it was originally conceived, although it has direction. This tank is preferably provided with a valve controlling discharge or gas or vapor from ' a central portion of the tank, after removal of ' This application is a, division of'our prior appli cation Serial Number 449,830, ?led July 4, 1942'. ' this gas or - vapor under the in?uence of cen The lubricating system of an airplane engine 10 trifugal force, and the opening and closing of this valve are controlled by the thickness of the layer of, liquid passing along the interior wall of the deaerator. 'Thus, when the wall of liquid exceeds or in the engine for pumping oil to the various I a predetermined thickness, the actuating mecha parts of the engine to lubricate it,_a sump in the engine into which the oil drains from the various } 15 nism moves the deaerator valve to a‘position pre venting discharge of gas from the tank, and when parts of the engine, a scavenge pump ‘for pump this wall recedes again to a permissible thickness, ing oil from the sump, a conduit from the scav the valve is again opened and discharge or gas enge pump to an oil cooler, an oil cooler and a consists of an oil storage tank, a conduit from the storage‘tank to the engine, a feed pump on conduit back to the oil storage tank. The sys tem may include additional items such as a relief 20 valve to by-pass oil around the cooler under cer tain conditions, a thermostatic valve for accom plishing this same purpose, and/or a centrifugal resumed. t‘ ' ., A better understanding of the details of the invention will be had by reference to the follow ing description in the light of the attached draw ing, in which, Figure 1 is a cross sectional view through a separator for purifying the oil after use, but the elements discussed above are the important ones, insofar as the background of the present inven-_ preferred form of deaerating apparatus, and tion is concerned. * The scavenge pump ordinarily has a displace- ' Figure 2 is a plan view of the apparatus of Figure 1 with parts broken away to illustrate a valve detail. ‘ - Referring to the drawing by reference charac ment from two to three times as great as the oil feed rate of the feed pump in the case of radial - ters', the deaerator consists of a tank Iil provided with an interior surface II which is preferably engines, and in the case of in-line engines, there circular, and which may be cylindrical or frusto are usually two scavenge pumps, one at each end of the crankcase, each of these pumps having a ' conical .as shown. This tank is provided with an inlet connection i2 for injecting oil tangen displacement at least twice as great as that of the tially into the tank along the surface II in a feed ‘pump. This relationship of capacities be direction having a longitudinal component toward tween the scavenge pump or pumps and feed the tangential outlet l3 which receives the oil. pump is necessary to insure the continuous re after the gas‘ has been separated by- centrifugal moval of all of the oil which drains into the force due to rotating movement of the oil during. sump. A necessary incident to this relationship, however, is the fact that vapor from the crank 40 passage along surface II from entrance to exit. The tank In is provided with an end plate I 4, case is pumped by the scavenge pump or pumps which ‘is removably mounted to permit access to , together with the oil through the oil cooler and the interior of the tank. This end plate is pro into the storage tank. The 'pumping ofthis vapor vided with a central opening to receive a housing through the oil cooler increases the drop in pres ; l5 for a packing gland, this housing being secured sure through the cooler and the load on the to the end plate by bolts IS. A hollow'tube I1 scavenge pump or pumps, and complicates the is slidably mounted in a central bore of the hous problem of cooling the oil. ing IS, the upper end of this tube extending to In order to solve these and other problems, a centrifugal deaerator is provided which may be" interposed in the line of flow from the scavenge pump to the oil cooler. ' - - a position within the tank I0, and this position to ‘being adjustable‘ by longitudinal movement of the tube. . 2 2,401,079 A packing gland l8 surrounds the tube I1 within the bore of the housing l5, and the pre vention of leakage and longitudinal securement opening in the otherwise closed upper end of the ’ tube H, and preventsfurther discharge of air so longa's this condition continues to prevail. As of the tube in the desired position are both ac the operation continues after this condition is complished by tightening of the gland nut I9. Tube I1 is provided with a nipple 20 at its reached, the pressure in the central part of the lower end for connection to other piping. A valve 2! is secured ‘in sliding relationship upon the released air cannot be discharged through the tube l1, and this increase in pressure will cause an increase in the amount of .oil discharged tank In will increase, due to the fact that the upper end of the tube l1, and the upper end of I , the valve is urged downwardly and held in con-' 10 ‘through tangential outlet I3, with the result that tact .with the upper end'of the tube I‘! by the the-amount of discharge will ultimately exceed spring 22. The lower end of the spring 22 is se the amount of feed, and the inner surface of the "cured in position longitudinally with respect to stratum of oil within the surface II will again ‘ the tube I‘! by the nut 23, which may be locked recede. When this happens, the spring 22 will by nut 24, both of these nuts being threaded to 15 again return the valve to open position, with the ' the tube l'l. These nuts provide a method of se result that the air can again be discharged curing the spring in position longitudinally, and through tube. l1. also a method of altering the tension on the Thev above description of the operation of the centrifugal deaerating apparatus is somewhat idealized for the sake of simplicity of explana - spring, as will be evident from inspection of the drawing. A stop pin 25 is secured to the tube ll adjacent the bottom of the valve 2 l, and this stop tion. As a. matter of fact. in the actual operation ‘ pin coacts with van abutting surface 25 of the of the ‘apparatus, the valve may not be moved ‘ lower end of the valve to secure the valve in open completely either to absolutely closed or abso position under ‘the in?uence of the spring 22 lutely open position, after the operation is well until accumulation of a predetermined thickness 25 under way. This valve moves to an intermediate of an annular layer of liquid along the interior position after a condition fairly close to equi of the wall II, as will be evident from further ' librium is established between the effect of the discussion of details by which this result is ac‘ spring 22 in moving the valve to open position and complished. A plurality of wings 21 extend out the eifect of wings 21 in moving it to closed posi- ‘ wardly from the cylindrically extending portion 80 tion. As a matter of practical operation, how of the outer surface of the valve 2!, and this ever, the effect of the valve in permitting dis valve is also provided with a cylindrically extend charge of gas, but preventing discharge of liquid ing portion 30 above the upper end of the tube through tube l‘! by preventing accumulation of H, in order to minimize leakage of oil into the too deep a stratum of liquid within the tank is tube I? by splashing. When the abutment 2B is 35 the same, regardless of whether the valve actu in contact with the pin 25, an opening 28 in the ating mechanism effects actual successive clos upper, otherwise closed, end 29 of the valve 2! ing and opening of the valve, or merely the at registers with an opening in the upper end of tainment Of an equilibrium condition which builds the tube l‘! to permit discharge of gas through up a pressure within the center of the tank sum these registering openings and the tube ll. When cient to bring the rate of discharge of oil through the abutment 26 is moved in a counterclockwise conduit 13 to the approximate rate of feed thereof direction-away from the pin 25, on the' other through the conduit l2. hand, these openings are brought out of registry -' Various modi?cations are possible within the with each other, with the result that the valve scope of the invention, and we do not therefore connection and possibility of discharge of gas wish to be limited except by the scope of the fol through the tube I1 is closed, much, after the lowing claims. fashion of a talcum powder can. We claim: ‘ In the operation of the above apparatus, the mixture of air and oil, which may be under pres 1. In a centrifugal machine for‘ separating gas from liquid, the combination comprising, a cen sure derived from the scavenge pump, enters 50 trlfugal separating chamber in the form of a through the tangential inlet pipe I2. The mix stationary tank, meansifor feeding a mixture of ture ?ows around the inner wall ll of the tank liquid and gas to said chamber and rotating said l0, during its passage-from the inlet l2 to the mixture around the wall of said chamber, means outlet l3, and this rotating flow causes separation for discharging liquid-from an outer portion‘of H of air toward the center of the tank under the 65 said chamber continuously during normal opera in?uence of centrifugal force. After being re tion of said machine, means for discharging sepa lieved of its air in this manner, the oil leaves the rated gas _from an inner portion of said chamber. tank through the tangential outlet I 3. The air a, valve controlling said discharge of gas, and a flows through the hole 28 and registering hole in rotatable actuating member within said cham the top of tube l1, and escapes from the appara 60 ber adapted to receive motion by contact there tus through this tube. So long as the valve is with of liquid rotating within said chamber upon maintained in open position by the action of the accumulation of said liquid beyond a predetere spring 22 in holding the abutment 26 against the mined annular thickness in sald'chamber, and pin 25, the air will discharge rapidly through the means controlled by said actuating member for valve and tube IT. During this operation, the operating said valve, whereby'dlscharge of gas thickness of the body of oil rotating within the is permitted untilsaid liquid has attained such surface I l during its passage longitudinally along that surface will graduallyr increase until the inner surface of this layer strikes the wings 21 and causes these wings to move in a counter predetermined thickness and prevented when said liquid has attained such predetermined thickness. 70 7 2. In a centrifugal machine for separating gas from liquid, the combination comprising, a cen trifugal separating chamber in the form of a stationary tank, means for feeding a mixture of liquid and gas to ‘said chamber and rotating said clockwise direction against the in?uence of the spring 22. This rotary movement of the wings 21 under the impelling effect of the rotation of the body of oil within the tank causes the opening 28 to be moved out of registrywlth the enacting 76 mixture around the wall of said chamber. means7 2,401,079 for discharging ‘liquid from an outer portion of said chamber continuously during normal opera-' tion of said machine, means for discharging sepa- ' rated gas from an inner portion of said chamber, a valve controlling said discharge of gas, and ro- ‘ tary means for actuating said valve upon accu mulation of liquid beyond a predetermined an nular thickness in said chamber, said rotary ‘ v 3‘ ‘ and designed to. be impacted by liquid rotating in said tank when said liquid exceeds a predeter mined thickness in said tank, whereby discharge of gas is permitted until s'aidvliquid has attained such predetermined thickness and prevented when said-liquid has attained such predetermined thickness. means including a plurality of vanes extending‘ outwardly from a central portion of said tank 10 I LEO D. JONES. JOHN J. SERRELL.