US1180346A - Rotary valve for explosion-engines. - Google Patents

Description

. IB, WALES., I

' ROTARY VALVE FOR EXPLOSION ENGINES.

' mmws APPLICATION FILED MAR. 29, I912.

2 SHEETS-SHEET I- Patmmsed Apr, 25,1916. I

Amman/1m B. VII/AILES v I yam:

im. 8. WALES;

ROTARY VALVE FOR EXPLOSION ENGINES. I I

Patented Apr 25,11916i 1 2 SHEETSSHEET 2- r APPLICATIONFILED P/LAR. 29 I912- 1 To all whom 2'7? may concern:

' incie'cs ports communicate with inlet HG VALVE PO )3; 33 I;

PLQSIUN-ENGINES.

ipplicatioii filed March 29, 1912.

Be it known that I, NA'ii-u): [EL P) Wellies, a citizen of the United States of America, residing at Boston in thecounty of Suffolk and State liiessechusetts, have ii1- vented. cer ain new and use meets in tiny Valves for EXplOSlOH-ED- oi l the following SPLClllCittion, hlfifiiQi' being hacl therein to the cccoi'n; y di'mviiigs.

The invcmioii. to explosion engines of rotary .vzilve type and. has 01' its object; first, perfect balancing of the valve; second, to effectively seal about the ports so as to prevent leakage; thircl to minimize frictional losses; and fourth, to avoid the necessity of close fits and the diiiiculties incident the unequal. expansion and contraction of the metal. 6

Vi ith these and other objectsin view the invention consists in vcrimus features oi? construction as hereinafter set forth.

In the (lrmvingsg liigure l is ii vertical central cross section through one of the cyll valve of on explosion engine; is it longitudinal section thereof with the valve shown in elevation 3 is at side elevation of the valve; K 5 and (S are cross sections therethi'ough inc t y, respectively; l? c longi '51. .lDEt l. section througl'i one of the a? gs; and Fig 8 is an elevation thereof is the casing of an esplcsioii engine ,gi'aic l of the integral. Hl'tllillCjli11del' 1 head rcferiihly integral with i and which ioij'ms 2i case JiOl c 1611 Min. extending rotary cylindrical valve The latter is common to all oi the SQVmitl. cylinders mod is driven. in properly timed solution by shits-ole mechanism such as the spiicl gears D and shaft E, which in turn is driven fromthe crank sheit't (not shown} i Unc of the objects of the invention is to maintain the valve in perfect balance and to this end the gases are introduced and. exhcustecl from each of the cylinders by Way of ports arranged. on diametrically opposite sides of the valve and of equal area. These and exhaust passages formed interiorly of the valve, behug sepiiiretccl from each other by suitable partitions and communicating respectively with iiilet and. exhaust passages in the es shown, l and l?" are the (li Specification of'lte'tters .Pacent.

l Improve- I Serial Itl'o. 687,107.

metrically opposite poi-ts both of which are ii constant coniu'iuniczitioii with the exploslon chmiibci. G and G are the coiipovut ing inlet ports in the valve uml .l-l mid H. the corresponding exheust ports All of the valve ports coii'iniimimic with the ill-- tei'ioiof thc who but the certs ii? 1111i ii" are in \ttomn'iuoion witli a chamber 1 While the port mull H" are in )lllll'llil'li cation with the hem the clionihei' l l 1 rtl'tlUil i for each eiig c g'liinlci" :u'e all iterei'itial aiiiienieiat 21ml mic sci i and proportioneil to i'egistci the Pitli'ffi ulicilmtelv with the pom-i. l l ii iii properly tiiiieil relation, the valve rota prefci'nhlv at one quarter crank sha ii't spe i The engine casing is provided with suit able inlet and. exhaust manifolds, these being formed in the intw'rzil hezul and connected to the chambers him the valve zit iliileren'i; POllliiSill the lcii 'tli thereof. sis SllOWlL the inlet passage extencis ioiigituilinollv oi the vclve case .5 ooovc the valve and conii iunicates'ivith the chamber 1 tin-cosh a civcuinfereiiticl series of ports iii in the valve.

in u simiizii: manner the exhaust clizunbei" J con'imuniczites through as annular series of ports ll in the valve with the exhaust passage 0 iii the casing ll ith the construction as time Tim. described it will be uiulei'stood that the pairs oi? opposed port i i of equal area, and which are in coostniit ,coimiiimiwion with the engine cylinder will poi-Lo 1 balance the ,ggziseous P'LQSGUEBSBH poo thevalvo. There are howeveir, other Lilli iiies to be overcome. one oi which is the uistortion oi the valve and its case thion iinei'; ul heat ing of portions thereof, 'lhis iiecess :zites the provision coiisiile i'hie clearance linextweiiin the valve and to avoid binding oi? the parts {mil which in tum. results leakage communication'With the engine cylinders.

This sealing means is preferably automatically adjusted into gas tight contact with the valve by partially balanced pneumatic pressure. In detail; P are the anti-friction journ'al bearings for the valve located in exten- I sions Q at opposite ends of the case B, R are the pneumatically operated sealing devices which are located in the ports F and F and are provided with valve contacting segmental surfaces S extending uninterruptedly completely around the port. A seal is i also formed between the member R and the 1 Wall of the recess in which it is located and the area exposed to pressure toward the valve is so proportioned to the area exposed to' an opposite pressure as to produce a slight differential in favor of the former.

" I The specific construction of sealing means plosionto complete the seal, and upon the exhausting of pressure'the resiliency of the metal will restore the wall to its normal dimensions again providing sliding clearance. The'thin Wall T is preferably circular in forinbut the ports F and ll are necessarily in the form ofa comparatively narrow and elongated slot which necessitates the change of form of the member R between the Wall T and the bearing -7and 8.

face S, as shown in Figs.

In alinement with the diametrically opposite ports, detachable cap members of suflicient size to permit of the insertion of the sealing means are positioned in the head.

T. This will effectually prevent leakage of the compressed gases While at the same time the valve remains out of contact with its case even where there is a distortion by the heat of explosion. As soon as the pressure within the cylinder falls to atmosphere all pressure of the member R against the valve is relieved, thereby reducing the Wear.

What I claim as my invention is: The combination with the cylinder of an explosion engine, ofa cylindrical valve case within the head of the engine extending across the cylinder, provided with diametrically opposite ports in communication therewith and with inlet and exhaust passages, a valve Within said case having inlet and exhaust ports adapted to communicate with said opposite ports, means surrounding said opposite ports for sealing between said valve and the case, and detachable cap members in the head of the engine in alinement with said o'aposite ports, said cap members being of sufficient size to permit of the insertion of the sealing means directly into positions for sealing their respective ports.

In testimony whereof i afiix my signature in presence of two witnesses.

NATHANIEL B. ALES:- lVit nesses;

James P. BARRY, Dnmsnirr OoLLINs.

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