Патент USA US2114858код для вставки
April 19,1938. . w A. RQsCH - 2,114,858 THROTTLE VALVE Filed May 13, 1937 F73. 1. I ' I 1m» l0 % § Inventor“: ' Arthur Rosch, bg JVljgyAttorneg ' . ‘ Patented Apr, ?g, i?g %TheW 2,114,858 i aliases . _THR® VALVE Arthur Bosch, llirieseiang, near Nansen, Germany, assignor to General Electric 60m '1' a corpo ration all New York Applicatégn y 13,1937, S The present invention relates to throttle valves No. lid2ad53 ' which contact the valve seat it in closing posi- ' tion of the valve and in opening position e?ect throttling of elastic ?uid ?owing from the inlet erative relation with a valve seat formed on the l l2 towards the outlet is. The valve disk is indi g casing. In the ordinary type of throttle valve cated in Fig; 2 by dash-dotted lines it in opening 5 position. The arrangement, as stated above, is heretofore usedthe throttling of elastic ?uid ?ow ing therethrough was e?ected at a single throttle such that throttling is effected in a plurality point so that the velocity of ?ow, especially where of steps or stages from the inlet channel i2 to high pressures had to be throttled, that is con- wards the outlet channel i3. Simultaneously la siderably decreased, e?'ected powerful expansion with the throttling, the elastic ?uid is permit- 10' noises, resulting in considerable vibration of the ted to expand whereby the velocity of the elastic ?uid on its flow from the inlet it to the outlet valve and the elements associated therewith. The object of my invention is to provide an it, that is through the passage formed between of the type which includes a valve casing with an inlet and an outlet and a ‘disk member in coop ' improved construction of throttle valves of the > the valve seat, and the valve disk, is maintained "I type above speci?ed whereby the pressure reduc tion of elastic ?uid may be accomplished in a single valve without causing unbearable noise and vibration thereof. This is accomplished with my invention by the a provision of a plurality of expansion chambers formed on one of the seat-forming casing and disk members so that the expansion of the elas tic ?uid may proceed in stages from compartment to compartment and the ‘velocity of ?ow of such 25 ?uidis reduced at the individual throttle points. The noise produced during expansion is consid erably reduced by shaping the- movable valve member and the valve disk so that for any valve lift the velocity of ?ow is substantially the same so at each throttle point. - 3 For a better understanding of what I believe to be novel and my-inventionL attention is di rected to the following description and the claims substantially constant and thus noise and vibra- 15 tion are . substantially eliminated. ' What I claim as new and desire to secure by Letters Patent of the United States is:-— i. Throttle valve having a casing with a coni cally shaped outwardly curved seat portion in- 20 creasing gradually in cross-section from‘ the in let towards the outlet, and a single conically shaped valve disk conforming to the shape of the seat witha plurality of annular grooves form ing expansion chambers increasing incross-sec- 25 g 1 tion from the inlet towards the outlet to pro duce successive expansion of 'the elastic ?uid ?owing therethrough without increasing the ve locity of the ?uid, the valve parts being so curved that the width of the outlet opening will be sub- 30 stantially equal to the axial movement of said valve disk. ‘ 2. Throttle valve having a casing with a coni appended thereto in connection with the accom-. ' cally shaped seat therein, said seat comprising ' an outwardly ?aring curved portion and a_?at 35 35 panying drawing. ' In the drawing. Fig. 1 is a sectional view of a ' tapered portion at the inlet edge thereof. a sin , throttle valve embodying my invention, and Fig. gle conically shaped valve disk conforming to 2 represents an enlarged detail view of Fig. 1. the shape of said seat portions, the curvature of said seat and disk being such that the width of the outlet opening will be substantially equal 40 to the axial movement of said disk, said valve disk having a ?at tapered face portion to coop erate with said ?at tapered seat portion and a The arrangement comprises a casing member 40 it which forms an inlet channel I! and a dis charge channel It. The casing portion connect ing the two channels I! and It forms a valve seat M for a movable valve member with a v stem i5 and a disk It in cooperative relation 45 with the seat I‘. The seat id, as shown in Fig. 2, is conically shaped and has curved walls’ so that the space ‘de?ned by the seat increases gradually in cross-section. The surface of the disk ' I 8 is shaped to conform to the shape of 50 the valve seat. In addition the outer surface of . the disk It has a plurality of annular grooves ‘ l1, which grooves form expansion chambers in creasing in volume from the inlet l2 towards the plurality of narrow annular faces on the curved ally in cross-section from the inlet toward the so outlet to produce successive expansion of the elastic ‘?uid ?owing therethrough without in-' or the velocity of the ?uid. ' _ outlet it. The disk portion intermediate adia ; cent grooves ll‘ form annular projections it - portion thereof spaced progressively farther 45 apart from said ?at tapered portion toward the outlet edge of said disk de?ning therebetween and with the ?aring seat portion a plurality of annular expansion chambers increasing gradu ARTHUR BOSCH.