US1058646A - Condenser air-pump. - Google Patents

Description

R. DQATOMLINSGN.

GONDENSBR AIR PUMP.

APPLICATION FILED JULY11,1910.

(2l/ 6MM 'unimib-STATES PATENT 'Osannal n'oYAL D. ToMLmson, or MILWAUKEE, WISCONSIN', AssIeNon 'ro ALLIs-cHALMnns coMPAnY, or MILWAUKEE, WISCONSIN, A CORPORATION or WISCONSIN.

counnusnn AIRPUMP..

l 'Specification of Letters Patent. Original application nl ed January 12, 1907 SerialNo. 351,973. Divided and this applicationled July 11,

Patented .apn-8,1913.

' 1910. Serial No. 571,265.

To all lwhom t may concern.'

Be itknown that I, ROYAL D. ToMLINsoN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in 'Condenser Air-Pumps, of which the following is a specification.

This/invention relates to improvements in the construction of` steam condensing apparatus and particularly to improvements in theconstruction of air pumps used in' connection with condensers.

An object -of the invention is to provide a condenser air pump,A which is simple in its construction and etlicient inoperation.

Another 'object is to provideV a valveless pump. in which the destructive eiect'of knocking due tothe' return of the'discharging water-into 'the -va'cumil spaces' ofthe pumpas these successively discharge their contents, is avoided.

Thisapplication is a. division of an 'application for patent' for. steam condensing" apparatus, -Serial No. 351,973, filed January 12,1907,-

A clear conception ofv one embodiment of the invention can be obtainedby referring tothe accompanying'dawingl. The figure shows a-central vertical section through a'condenseifhead and' condenser air pump and the connections; communicating j between the two.;l

piston type and'postively displaces the duid.

The condensing head 1' is provided with a steam inlet 2 at its'top and a water discharge 'outlet at its lower'` end. A water inl let pipe 4 which 'spreads out within the condensing chamber in the form of an umbrella or air' tra 6, enters the'condensing head 1 intermediate the inlet and outlet thereto. A deiectorris xed to the water inlet .pipe 4V at'the end thereof which discharges into the condenser -head 1. The pump 8 has its 'inlet 81 connected to the water outlet pipe 3 of-.the head l. The discharge outlet 82of the' pump 8 is connected through the pipe 83 tp any convenient discharge well, not shown. The pipe 83 is conneet-ed to the atmosphere by a port 831 which is located preferably near the discharge outlet 82. The pump 8j is of the rotary. geared pumped when 1n. operation. Theimpellers l85 are geared together by gears 86, of which gears the pitch lines alone are shown. The driving of the impeller shafts of the pump 8 is accomplished by means of apulley or oth er similar means fixed to an -overhanging end of one of the impeller shafts.

Air chambers 882 are placed in communication with the interior of the casing of the pump 8 at points slightly in advance o`f the tangent point on the impeller 85 at Vthe time the following impeller lobe is working into coaction with the casing. This is to insure that the impeller lobes shall isolate a working space before opening up communication between the chamber 882 and the space above the inlet 81.

y Equalizing or discharge pipes 9 lead from underneath the air trap 6 within the con- `denser head 1, through the head, and to the pump suction, discharging into the pump at inlets 91. These pipes' 9 have no port-ion .thereof dipping below and subsequently rising to a horizontal plane, or in other Words, their structure is such as to avoid the formation of liquid traps, thus insuring that these pipesform a constantly open means for conducting gas from the condenser head 1. .But one of t ese'pipes 9 is shown in the figure, butin practice it is usual to apply two of Athem leading same to each side of the pump 8 and also from opposite points underneath the gas or air trap 6. W'ater' conductor pipes so I 92 lead into the equalizing Pipes 9 from any convenient source, as shown, for instance, from the condensing'water inlet plpe 4. .The conductor pipes 92 are controlled by valves '93, and terminate in nozzles orV spray ends 94 withinthe pipes 9. The spray ends 94 are directed toward the pump 8.

-The operation of the device is as follows.:

-Steam is condensed in the condensing chamber 5 of the condenser head 1 as.it enters the .chamber at the steam inlet 2, by the inrush oecondensing. water through the pipe 4 atits discharge end just above the umbrella or gas trap 6. This water in rushing ott from the umbrella, is thrown against theinnerjvalls of the condenser head 1,thus forming a seal which prevents the air from returning to the spaceabove the umbrella. The condensed steam mingles'with the condensing water and the mixture is discharged through the water outlet pipe 3 to the pump inlet 8l. As' theimpellers 85 of the pump 8 rotate, they carry this mixture of conlos densing water and condensed. steam Aup` wardly past the inner semicylindrical sui'- faces of the pump 8 and-discharge same -through the outlet .82'. The Water-is then have come into the condenser either with the steam or the condensing water, will gather underneath the umbrella orgas trap 19 6 and will from there be conducted through in its passage by the spray of water intro.

duced into .the pipe 9 from the condensing water inlet pipe 4 by means of the conductor pipe 92. It will be noted that the gases en- 'tering the pump 8 throughthe inlet 9 are admitted at the highest point possible .a ove The inlet 9lnis located at the point at which vthe highest vacuum is maintained in any port-ionof the apparatus. The air or gas introduced atthis point will be carried along by the impellers 85 together with any water" entering'through' the inlet 81, and will be urged through the pump 8 with the waterpassing therethrough. lVhen 'the imp ellcr lobe passes the inlet tofthe air chamber 882, the water previously forced into the air chamber'882 will gradually pass out and break the vacuum inthe pump' space. As the impeller 85 proceedsand when the lobe leaves .the inner semicylindrical surface of the 'pumpcasing and moves. opposite the pump discharge 82, communication is established between the air chamber 882 and the pump discharge 82. Ihe atmospheric pressure established in the discharge 82 will 40 then cause waterl to rush back into the air chamber 882 until the next succeeding lobe 1 of the impeller 85 passes the pipe connection between the air chamber andthe interior of the pump.

It is obvious that the chambers 882 need notbe closed at their tops as shown. "It is also obvious that instead of having an' air chamber communicating with the pump,

` merely a communicationthrough the pump casing to thei atmosphere would be sulicient. In the latter 'case the air would simply rush into the pump space to relieve the vacuum. Theremight be a slight discharge of water after the relieving of the vacuum, but this would not be much and could be easily drained away.

While the invention has been described as .applied to a steam condenser system, Ait is obvious that it might. be applied to any ap-. paratus in-"whicha gas or vapor 'is condensed to 'a liquid and also where during suchcondensation a high vacuum is to be maintained in the condensing chamber. Such conditions prevail in evaporators.`

It should -be understood that it is not deconducted through pipe 83 to the discharge well. Meanwhile, any air or gas vwhich may' .gas'pas's'age connecti said liquid space of the pump 'above the nor- 90 Itis claimed and desired to secure by Let ters Patent,- .1. The combination cfa chamber, a gas t-rap in the chamber, a pump 4having a space therein for liquid, means for conductingliquid from the ,chamber to said liquid space of .the pump, a separate 4constantlyopen ,.f"

means connecting the gas trap to said liquid space ofthe pump at a point intermediate' the inlet andthe discharge of the pump for conducting gas to the pump to commingle with the liquid in said liqu'id space, such gas conducting means Abeing so located and ex# tended that liquid therein will gravitate to.-

ward said liquid space of the pump. l Y 2Q the normal water line in the pump inlet 81.

2. The combination of a chamber, a pump having aspace therein for liquid,-a liquid 'passage between the chamberand said lid-- uid space'ofthe pun'ifand a constantly open im 'iig the, chamber;v with mal water' level therein, said 'gas passage being'so directed and extended as to gravitate liquid-therein toward sai ,liquid `sp ace of 3. The combination of a chamber, apuinp having a space therein for liquid, .means for conducting liquid fromthechainber to said liquid space' of the pump, and separatecon# stantly open meansof communication be tween the-chamber and said liquid space' of' the,pump, said-ineans connecting with said liquid space of the pump from a levlhigher than that of the connection lof the'means.

with said liquid space of the pump.

.4. The combination o f v-a chamber, a mechanically operated pump, a constantly open means of communication for liquid between .the l,chamber and the pump, `and a vmeans off'communication constantly open forthe free and unobstructed passage of gas between' thechamber and the pump separate 'from the first mentioned means of communication and connecting to said pump at a higher level than the point of connection to said pump of the "first .mentioned means of 11'5 communication. l

5. The combination of a chamber, a pump, means for conducting li uid from thc ,chamber to the pump, an separate means of communication constantlyopenlgo for the free and unobstructed passage of gas leading from the chamber to the pump but both means connecting to the common pump chamber, said separate means being so located andl extended that vany liquidthat mightfind its way therein wlll by gravity be carried into the pump and said separate means connecting to said pump at a higher level than the pointotconnection to said pump of the said liquid conducting means. 13o

Losses@ Water pv ssag'e leading from said chamber' ieto Said casing et the suction side thereof,

' sind en air pessage leading,f from said chamacting rotary lolied therein having Water passage leading sint within tlie portion of sei casing ed by the impeller lobes, said passage se located and extended as to gravi- Wate 'therein into said pump d mineller type, of an air inlet pas le; ing into the pump chamber at a 'o om 'iunicate with the displacement ,spaces alter they are cut 0E from the suction side of the pump and before lthey are delivered to ti e discharge side oi the pump. V

8. llie combination, in a vacuum pump having v pair or ooacting rotary lobed iin- A Tellers and its discharge outiet uppermost, an air inlet passage leading into each side opi' the impeller chamber in position to comniunieate with the displacement spaces after they ere separated from the suction side of the pump .andbefore they are delivered to the discharge side tire' pump.

l. el Vacuum pump herring pair of coimpellers inte die suction side of said pum easing A coo'nation, in a vacuum pump of mountedfle into the bottom of the impeller chamber and an air passage leading into the suction side of the impeller chamber at a point above the lowermost position of the impeller' lobes.

4vl0. The combination of a chamber, a pump having a pair of coacting rotary lobed impellers, means for conducting a liquid from the chamber to thev pump, and separate means for conducting gas from said 'chamber to said pump at a point Within the travel or" the impeller lobes.

il. The combination ot a chamber, a pump having a space therein for liquid, a liquid passage between the chamber and said liquid space of the pump, and a constantly open gas passage connecting the chamber with said liquid space of the pump.

l2. ln combination, a chamber, means for conducting liquid from said chamber, a constantly open means for conducting gas from said chamber said conducting means havin structural features by means of which liquid traps are avoided, 4and a single pump for urging liquid and gas respectively through their said conducting means.

' in testimony whereof, I affix my signature in the presence of two Witnesses.

' RGYAL D. TOMLINSON.

Witnesses:

Gr. l?. DE WEIN, W. H. LIEBER.

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