US914699A - Compressor-valve. - Google Patents

Description

N. Af GHRISTBNSEN. COMPRESSOR VALVE. A APPLIUATIOIIILBD 1:53.21, 1904.

914,6999 Patented Mar.. 9, 1909.

l/ am Ne sa NIELs A. oHnisTnNsnN, or MiLwAuKEn wisconsin.

lo oMrREs'so 1a-VALVE'. I

Specification of Letters'Patentl PatentedMarch 9, 1909.l

To all whom it may concern.'V Y

Be it known that I, N rELs A. Cnnrsrnn- SEN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin,- have inventedccn' tain new 'and useful Im rovements in Compressor-Valves, of Whic the following is a specification, reference being had to the accor'i aiiying drawing, forming a part thereof.

signedto operate on air-vorel-astic iiuids and space as much as possible, particularly when high ressu'res are to be produced and maintam The main objects ofv theinvention arey to l reduce the clearance space; to make the sucthus avoidingthe necessity of making.,and

tion- 'and discharge valves interchangeable,

keeping in stock or at hand, different kinds of valves for use Whenneeded, and revent 4nag 'mereces ofthef clearance space y acci dental .interchangeor misplacement of the 5 valves; to make-.the valves sensitive or ref.

'sportsive to slight variationsfin pressure and prompt action; and generally to improve the-constructionand operation of valves of this class.

`The invention consists in the novelconstruction-fand arrangement of parts hereinaf ter' particularly described and pointed out in lin-the accompanying drawin -lil'ie' letters j designate the same parts in bot figures. f

Figure 1 is a vertical section of a cylinder head to AWhich my improved' valves are api valves andA valve chambers axially yirai-aaa@a by the une 2 2, Figi .45-

lied in a. plane indicated by the'line 1-1,l

.` chambers; which ii'the'v present instance are show-n as formed side by side in the head' c of a`v compressor. Thesechambers are open at their upperends', and at their. .lower ends valve'seats are formed or provided around1 ports, one of which on the suction side cornrnui'iicates with the air inlet or" supply pascaged', and the other on the dischargev side' j s invention relates more particularl to compressors which have automatic valves actuated by changes inpress'ure, and are de ypressor cylinderV and va Wirt-hi ylndef P0A e, Opening directly into 'the compressor cynnder. Just above the valve seat the suction valve chamber com.

municates directly through a port f with the compressor` cylinder, and just above its seat the discharge valve' chamber communicates with a discharge passage g. The valve channbe'rs are closed by caps or covers 7i bolted or otherwise secured to the cylinder hea-d. These caps are formed or provided with lugs or extensions t', which correspond in slhape with and project downwardly into and near y nfill the valve chambers within a short fl-is-l m which 1t is desirable -tozreduce the clearance tance of the valve seats. y y are seamless cup-shaped valves preferably made of cold drawn steel, o en at their .upper ends andclosed at their oWer ends,

which are litted'to the valve seats and con# stitu'te the working faces of the valves. They extend upwardly into and work freely in the spa-ces betweenthe plugs i and the Walls of t e valve cham-bers which are of corresponding sha -by'sai vWalls orby both. The distance'be- -tween the lower ends of the plu ls and; the 4valve' seats, determines the lift o' tlief valves, their upwardA movement being arrested by the lower ends of the plugs .insteadf of'by the thin upper edges of the valves themselves striking against the caps h. s there* is a tendencyof carbonto collect upon and adhereto thel outside but not the inside of both suction and discharge valves, greater .clearance space is preferably left outside of the valves, as shown in Fig'. 1', so that they will Work perfectly free and'l at the sarn'e time be guided and held in place by the-plugsi, ulpon which they may have' acomparatively coset. 4

lt will be understood that the plug, when' used, Will serve' to guide thvalve, but if the plug be omittedz the walls of the' valve charn`- ber/will bev sufficiently 'closevv to the' v'alve to'rg'uide' it effectively with the plug' omitted. o enable the changes inv pressure, which are constantly taking l ve chambers when the compressor Visfin' operation tobeinstantly communicated to the air in the spaces' between' the' closed ends of theV valves'- andthe' lower ends df the plugs'i, and: to' revent au' confined saidjs'pac'es freinA inte erlg the fre/separation of theva-lves'-, the valves f are perforated just abovel their seats a series of holes-lc. Free cominuincatien'isthus e, being guided either by said plugs,

`00 place in the coinestablished between the air outside and the y air inside of the valves, and variations in the ressure outside are instantly followed by' ike variations in the pressure inside of the valves, so that they are always free to operate.

The holes 7c are so located that they will be closed or artially closed by the plugs fi when the va ves are opened and the closed ends oi the valves will thus be cushioned and revented from striking forcibly against the ower ends of the (plugs. v v The valves y' an preferably the caps h with the plugs fi, are'made alike, so that if they are accidentally interchanged or misplaced the clearance Will not be increased and the operation of the compressor will' not be affected.' The plug i may however be omitted on the discharge side without increasing the clearance space or'aiiecting the .operation of the compressor, ii care is taken to keep the parts in their proper places. On the suction side, where the valve chamber'is in constant communication with the compressor cylinder, the plug't,nearly iilling said chamber, reduces the clearance s ace to a minimum, just enough being allowe for the necessary move# ment of y the valve. The valve chambers arranged as shown in the drawing are brought close to the end .of vthe working stroke of the piston and the contents of the 4passages connectingV them with the cylinder are thus reducedto a minimum; springs are dispensed with, and the valves are easily reached for inspection and repairs. p

Itwill be observed that free communication is established between the supply passage d and the suction port f by way of a passage through the suctionvalve chamber, and that free-communication is also established between the cylinder port e and discharge g by way of a passa e through the discharge valve chamber, t e vpassage through each valve chamber bein independent of the clearance space in eac chamber, that is, the

passageisother than or aside from the clearance space above or outside oi the limits of such passage although such passage may be 1n -communication with the clearance s ace..

Constructed as herein shown an described, valves controlling ports of large area are madeextremely light and sensitive.

Various changes in minor details of con`4 from the principle and intended scope oi the'/ 2. The combination with a suction valve chamber, of a cup-shaped valve therein, said .chamberbeing rovided with a port above the .valve-seat or communication with the compressor cylinder, the walls of the valve chamber bein suciently close to the valve toguide it e ectively, and a passage provided for the passage of iiuid independent of the clearance space inwhich the vvalve Works, substantially fis-described. 3. In a compressor, the' combination with -a valve chamber, of a vcup-shaped valve therein,l said chamber being provided with a ort in its wall above the valve-seat and be owthe top of the valve, the walls of the l"ialve chamber bein suiiciently close to the valve to guide' it e 'ective'lyQand a assage providedtor the passage of iiuid in ependent of the clearance space in which the valve works, substantially as described.

4*.'The combination of a valve-chamber,`

wa s of the valvechamber being in close proximity to the cup-shaped valve vand Athe plug on which it is guided to reduce clear` ance space, and a passage provided .for the passage of i'luid independent of the clearance space in which the valve works, substantially v las described.

5. In a compressor, the combination of a valve chamber, va cover having a plug rojecting into vsaid chamber Within a sliiort distance 'of the valve-seat and iilling said chamber in cross section with the exception of a working clearance for a valve, and a cupshaped. suction valve ,loosely iltting at Vits open end into the clearance space between` said plug and the wallof the valve chamber,

said chamber being provided with a cylinders.

port above the valve-seat, substantially as n' described.

6. AIn a compressor, the combination of a valve chamber, a lug chamber within a s ort seat, and a cup-shaped valve extending' at its open end into the annular space surrounding said plug and perforated adjacent to its `wor king face, said vlave chamberhaving a port in its wall 'above the valve seat, the wallsof the valve chamber being inI close proximity to the cup-shaped valve 'and the plug on which it is guided to reduce clearance space, anda passage provided for the passage lprojecting into said of. fluid independent of the clearance space works, substantially asv 'in which the valve described.

7. In a compressor, the combination of suction and discharge valve chambers, 'a

- plug projecting into' the suction valve 'cham-` istance of the valve- 'ris ber Within a short distance of the valve scat and iilling said chamber in cross section with the exception of a Working clearance for a vlave, and interchangeable ou' -shaped suction and discharge valves, eac adapted .to Work at its open endtin the space between said plug and the wall of the suction valve v chamber, which has aport in its Wall above the valve seat, substantially as described.

8. In a compressor, the combination of suction and discharge valve chambers having interchangeable covers provided with plugs each of Which is ada ted to project into the suction valve cham er Within a short distance 'of the vlave seat and to Vfill said chamber With the exception of a Working clearance space for a valve, and interchangeable cup -shaped suction and" discharge valves, each adapted to Work in the clearance space between either of -said plugs and the Wall of the suction valve chamber, sub# stantially as described.

-9. In a compressor, the combination of suction and discharge valve-chambers, a

plug projecting into the suction valve cham# 25 er within a short distance of the valve seat and filling said chamber in cross section with the-exception of a Working clearance space for a valve, and interchangeable cup-shaped suction and discharge valves, each adapted 30 to Work in thev clearance space between said plug'and thel surrounding wall of the suction valve-chamber and perforated adjacent to its Working face, substantially as described.

In Witness Whereof,1 hereto alix my sig- 35 nature in presence of two witnesses.

NIELS A. 'CHRISTENSEN Witnesses:

E. C. H. BoTnUNl CHAs. L. Goss.

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