Патент USA US2136098код для вставки
L. H. BROWNE Nov. 8, 1938. 2,136,098 AIR COMPRESSING APPARATUS , Filed July 28, 1957 15 Sheets-Sheet 1 INVENTOR L z'ndsay H Browne. ATTORNEYS ~ _ Nov. 89 31938, 291364398 L. H. BROWNE AIR COMPRESSING APPARATUS Filed. July 28, 1957 5 Sheets-Sheet 2 1%.; War; “magmaA‘I , ‘ ‘511/ 2 / 'INVENTQR Y Llkwisa’ filfé’msgma. Nov. 8, 1938. 2,136,098 I. |-_|. BROWNE ' AIR COMPRESSING APPARATUS Filed July 28, 1937 3 Sheets-Sheet 3 INVENTOR Lindsayli?rowne. ' w ‘ . AUm N 0mm Patented Nov. 8, 1938 - _ . UNITED STATES PATENT, OFFICE ‘ 2,136,098 AIR COMPRESSING APPARATUS Lindsay H. Browne, Pittsi’ord, Y., assignor to Kellogg Compressor and Manufacturing‘ Cor poration, a corporation of New York . Application July 28, 1937, Serial No. 156,075 '1' Claims. (Cl. 230-58) This invention relates to improvements in air compressing apparatus. An object of the invention is to provide an improved air compression unit including com5 pressor, motor, storage tank and accessories. Another object is to provide a unit of the above nature which is quiet and smooth and ef?cient in operation. A further object is to provide a~unit of the 10 above type in which the motor and compressor are supported on the tank by vibration absorbing Figure 17 isavertical fragmental sectional view of the ?rst stage suction and discharge valve structures and mounting taken on the line i1-l1, 5 Figure 12. Referring to Figure 1, the numeral 20 indi cates a storage tank provided with feet 2| and pressure gage 22. Brackets 23 welded to the tank 20 have secured thereto resilient mounting pads 10 24, preferably of the structure shown in detail means eliminating all metallic connections be- in Figures 3 and 4- tween the elements. Still another purpose is to provide improved Referring to the latter ?gures, the pad 24 consists of a cupped metallic mounting plate 25, 15 discharge means for delivering the compressed air into the storage tank by which noise due to drumming or, pulsation of the discharge is elimi- nated, and by which any leakage from the valve outside the tank is rendered impossible. ' 20 Figure 16 is a detail view of the valve plate; and - a rubber body 26 secured into and extending 15 above the plate 25, and a central bolting cup 21 of metal secured in the body 26 and resiliently separated thereby from the mounting plate. The plate 25 and cup 21 are preferably made of Another purpose is the provision of a unit in- stampings provided with tongues 28 and 29 em— 20 cluding a compound compressor having improved head and valve structure, and in which the crankcase is sealed from the outer air. A still further object is to provide improved 25 means to cool the air between stages and before bedded in the rubber body 26, the entire assembly being permanently Vulcanized together- The mounting plate 25 has lugs 30 provided with holes 3| through which the Dad is bolted to the brackets 23, Figure 1, and'central holes 32 in 25 delivery to the storage tank. > g Other objects and advantages of the invention will become evident during the course of the fol- lowing description in connection with the ac30 companying drawings, in whichFigure 1_ is a perspective view of a preferred form of the invention; Figure 2 is an exterior detail view of the the bolting cups 21 accommodate bolts 33, Figure 1, by means of which a frame or base 34 is secured to the pads. , From the foregoing it Will be Seen that the base 34 and tank 20, while ?rmly connected, are 30 resiliently insulated from each other by the pads 24. Secured on the base 34 is a compressor 35. resilient discharge connecting device; 35 Figure 3 is a plan view of a preferred form of resilient mounting device; Figure 4 is a vertical sectional view of the, preferably of the two-Stage type, and a Suitable driving motor 36. The compressor 35 has atriple 35 grooved ?ywheel 31 acting as a pulley and driven through three v-belts 38 from the motor pulley same; ' Figure 5 is a longitudinal sectional view of one 40 form of the discharge check valve; 39. The spokes 40 of the ?ywheel 31 are formed as fen-vanes, Which When in ‘motion provide a _ blast of cooling air as hereinafter set forth. ‘ 40 Figure 6 is an end elevation of the same; Figure 7 is a side elevation of the same; ' Figure 8 is a longitudinal sectional view of an alternative form of discharge check valve; 45 Figure 9 is an end elevation of the Same; Figure 10 is a detail view of the discharge check valve disc shown in Figure 8; , Figure 11 is a detail view of the spring retainer for the same; 50 . Figure 12 is a horizontal sectional view of the cylinder head; Figure 13 is a bottom view of the same; Figure 14 is a detail view of the valve seat ring; Figure 15 is a similar view of the valve re55 tainer ring; The Compressor 35 is equipped with a head 4| Ofa type Shown in detail in Figures 12, 13 and. 1'7, the head being belted t0 the cylinder block 42, Figure 1- The block 42 has e low Pressure 01‘ first stage cylinder 43 and a high pressure cylinder 45 44, the lines 011 Which the inner circumferences of these cylinders register with the headv 4i being indicated by dotted and dashed lines 45 and 46 respectively on the bottom view of the head, Figure 13- 50 A suction or inlet elbow 41, Figures 12 and 13, preferably integral with the head‘ 4|, leads into an inlet pocket 48. Two valves 49 and 50, con structed in a manner hereinafter described, per mit the passage of air from the pocket 48 to the 55 2 2,186,098 ?rst stage cylinder 4i. A second pair of valves 5| and 52 permit discharge of air from the cylin der 4| to a second pocket 53, from which a con nector elbow 54, Figures 1 and 12, conducts the air to a ?nned tube 55. The tube 55 is formed in a loop disposed in position to receive a blast of cooling air from the fan-blade spokes 40 0f the ?ywheel 31, and leads through a second elbow ?tting 56, Figure 12, into the inlet pocket 51 10 of the second or high pressure stage of the com pressor. The ?nned tube 55, so disposed as to receive the cooling blast from the ?ywheel, this together with the extreme lightness and resilience . of the valve plate, results in very quiet valve ac tion and low resistance to the passage of air, which advantages are further augmented by the use of the two identical inlet valve assemblies 48 UK and 50 to divide the total volume drawn into the compressor. The discharge valve assembly 5| is identical with the inlet valve assembly 49 described above except that the entire assembly is inverted, the 10 head or spider end of the cup 63 being screwed against the shoulder 13 and the seat ring 62 be operates as an inter-cooler between stages of the coming the locking member. The operation of compressor to dissipate heat of compression from the valve is the same as described except, of course, 15 the ?rst stage. ‘ that it permits discharge of air from the ?rst From the pocket 51 a valve 58, of construction stage cylinder 43 to the inlet pocket 51 of the high 15 identical with that of valves 49 and 50, admits the pressure cylinder. air to the high pressure cylinder 44 from which The inlet and outlet valves 58 and 59 of the after compression it is discharged through a valve second or high pressure stage are identical in 20 59 and pocket 68 to a discharge tube 6| herein structure with those described. Thus all valves 20 after described. are interchangeable, a condition highly ad All the valves noted above are of identical con vantageous both from the view-points of manu struction, ‘consisting of parts shown in detail in ‘ facture and service. The simple and compact Figures 14, 15, 16 and 17. These parts consist standardized valve structure allows great ?exi 25 of a seat-ring 62, a guide cup 63, a valve plate bility in design of the compressor for different 25 64 and a conical compression spring 65. sizes and capacities, as the valves may be dis The seat-ring 62 has a ?at annular seat por posed singly or in multiple in any desired combina tion 66 raised slightly above the outer rim of the ring and above a central depression 61, the seat 30 portion 66 being pierced by a plurality of arcuate slots 68. The guide cup 63 consists of a short cylindrical barrel 69 formed integrally with a ?at perforated head or spider ‘I0. Both the seat ring 62 and 35 guide cup 63 are threaded on their peripheries. The valve plate 64 is of thin resilient steel, and is hexagonal in shape in rounded corners ‘H and a central hole 12. Figure 17 shows in sectional detail the manner 40 in which two identical sets of the above parts are disposed in the head 4| to form inlet valve as sembly 49 and discharge valve assembly 5|. Referring ?rst to the inlet valve assembly 5|, Figure 17, it will be seen that the seat ring is 45 screwed against a shoulder 18 at the upper end of tion. To widen the ?eld of capacities for which the compressors are designed, a second standard ized valve assembly may be provided, identical 30 in structure with that described above, but of smaller size, and in some cases assemblies of both sizes may be embodied in one compressor in order to achieve the most advantageous spacing, grouping and capacity of valves. The discharge tube 6|, previously referred to, is composed of ‘externally ?nned tubing. It is formed in a loop encircling the shaft of the com pressor in the zone of air blast from the ?ywheel fan spokes 40 as shown in Figure 1. ‘The tube 6| thus constitutes an after-cooler giving up heat of 40 compression to the ?ywheel air-blast in the same manner that the loop 55 operates as an inter cooler. The discharge tube 6| terminates in a union 11 to which is secured a length of resilient hose or 45 tube 18, Figures 1 and 2, preferably of a re inforced synthetic rubber construction. The a threaded hole 14 leading from the lower face of the head 4| to the pocket 48, the annular seat portion 66 being directed downwardly. ‘The thin valve plate 64 is held against the seat 66 by the . other end of the resilient section 18 is secured to conical spring 65, covering the arcuate slots 68. a threaded connector 18 which is screwed tightly 50 The guide cup 68 is screwed into the threaded hole into the inlet end 80 of a-check valve assembly 8| 14, the end of the cylindrical barrel 68 tightly en shown in detail in Figures 8, 9, 10 and 11. gaging the rim of the seat-ring 62 and locking Referring to Figure 8, it will be seen that the both parts in place. The rounded corners of the check valve unit 8| has a body 82 into which is 65 valve plate 64 ?t loosely inside the barrel 6! which threaded a cap 83 formed with a constricted cen thus serves to guide the valve plate, the spider tral 'nozzle 84 and enclosing a cylindrical chamber 10 serving to hold- the spring 65 in compression 85. A resilient seat ring 86, of rubber or the like, against the valve plate to urge the latter against is ?tted into an annular recess in the body 82, a its seat 66. thin cylindrical inner wall 8'! of the latter extend The end of the barrel 68 is bevelled at 15 and ing substantially through the rubber ring so that 60 the shoulder 18 may be grooved or undercut at the latter is rigidly supported against distortion, ‘I6, thereby providing narrow circles of contact be on its inside as well as on its outside circumfer tween the mating parts and permitting air-tight ence. A valve disc 88 has a raised annular por joints without the use of gaskets. tion 88 engaging the seat ring midway between When by descent of the piston in the compressor > the latter’s inner and outer circumferences. 65 cylinder 43 a partial vacuum is created therein Small radial projections 98 on the valve disc serve below the head 4|, the preponderance of pressure to guide the disc loosely in the bore of the chamber in the inlet pocket 48 acts through the arcuate 85 and thereby ensure proper concentric engage slots 68 to press the valve plate 64 downward from ment of the disc and seat. 70 its seat 66 allowing air to pass through the spider The valve disc 88 is urged against the seat ring 10 and into the cylinder. In its passage the air passes around the hexagonal periphery of the valve plate and also through the central hole 12, giving a relatively large area of inlet opening with 15 very small motion of the valve plate. This fact, 86 by a compression spring 9| guided on a tapered spud 92 secured in a cross member 93 which spans the chamber 85 and presses against a shoulder 84, 50 55 60 70 Figure 8. A short cushioning spring 85, secured in a recess 96 in the spud 92, serves as a resilient 75 3 I 2,130,098 stop to limit the opening motion ‘of the valve disc 88. , bow 41. A combined inlet muiller and air ?lter II4, secured to the end of elbow 41, silences and > The body 82 is provided withan exterior tapered thread 85 which is screwed into a suitable ?tting 86 in the top of the tank 20, Figure 1. Thus, the entire valve mechanism projects inside the tank 20, and there are no exterior joints in the check valve assembly through which leakage might occur to the outer air. 10 / In operation, the chamber 85 and restricted nozzle 84, both located inside the tank 20, act as a a muffler for discharge of compressed air into the tank. Any pulsations of air through the valve are equalized in the chamber 50 so that 15 the discharge of the air through the nozzle 84 occurs smoothly and at a practically constant rate. By this means “drumming” or audible vi bration of the air discharge into the, tank is eliminated. The motion of the. valve disc 88 20 takes place entirely between resilient limiting means, that is, between the rubber seat ring 86 and the stop spring 95, so that no clicking or hammering can arise at this point. The com bination of this valve action and the elimina 25 tion of pressure pulsations as described above results in a substantially silent air discharge into ?lters all inlet air drawn into the compressor. The connection of the pipe II2 as described al lows the crank case to be sealed from the outer air, all “breathing” taking place with ?ltered air from the muiiied inlet passage. Contami nation of the crank case lubricant with dust and dirt is thereby avoided, and the “panting” sound common to open breathers’i'iiis entirely elimi 10 nated. From the foregoing description it will be seen that the cooperation of the features of the in vention set forth throughout cooperate to pro duce a silent and e?icient compressing unit. 15 Pneumatic noises are eliminated by the inlet mu?ier, internal breather, light and efficient compressor valves, and the combined check valve and discharge muf?er structure, while the resil ient connection of the compressing mechanism 20 to the tank 20 by means of the pads 24 and the the tank 20. ' The contact of the valve disc with the mid dle portion of the face of the rubber seat 86, 30 and the latter’s rigid support, as previously set forth, resulting in long seat life and sustained tightness‘ of the valve. A tapped hole 81 in the valve body 82 near its inlet end 80 is provided to permit connection 35 by means of a smallv ?exible tube 98, Figure 1, to a combined pressure switch and magnetic un loader 89 mounted on the base 34 behind the motor 36. The structures of such pressure switches and unloaders are well known to those 40 skilled in the art and therefore are not described herein, their functions being to break the motor circuit when the pressure in the discharge line rises to a predetermined point and at the same‘ time to exhaust the discharge line to the atmos phere through the tube 98, ‘so that restarting of g the compressor occurs only against atmospheric ?exible discharge coupling 18 prevents trans mission of any mechanical or electrical vibra tions to the tank and its foundation. The location of the ?nned inter-cooler 55 and 25 after-cooler 6| in the air-blast of the ?ywheel 31 contribute to the quietness of the machine by eliminating auxiliary fans, and the shape and large cooling surface of these members exposed to the air blast, in cooperation with extensive 30 cooling ?ns II5 on the cylinder head 4I, provide thorough dissipation of the heat of compression prior to delivery of air to the storage tank 20. While the invention has been described in pre ferred form, it is not limited to the precise struc tures set forth, as various modi?cations may be made without departing from the scope of the appended claims. What is claimed is: I 1. In an air compression device, in combina 40 tion, a storageltank, a plurality of resilient pads secured to said tank, a compressor base mounted on said pads and secured thereto, a com pressor on said base, a motor on said base and connected to said compressor to drive the 45 same, a discharge line on said compressor, a dis charge check valve within said tank, means in pressure. cluding a resilient tubular coupling joining said With small compressors an alternative form discharge line to said check valve, and control of check valve unit shown in Figures 5 and 6 means includingvmeans to release the pressure may be used, in which the body I00 is construct 50 ed at IOI for a tubing union connection. The from said discharge. line and resilient coupling. The combination claimed in claim 1 where cap I02 encloses the equalizing chamber I03 in in 2.said control means includes means on said which is guided a light disc valve I04 and its base and responsive to pneumatic pressure to compression spring I05. The cap I02 has an ex control the operation of said motor and com terior annular stepped groove I00 from which pressor, and a resilient tube adapted to trans 55 a hole I01 leads into the chamber I05. A re- ‘ mit discharge pressure from the inlet side of silient metal clip I08 is sprung into the outer said check valve to said control means. step of the groove I06, leaving a slotted opening 3. In a device of the character described, in I08 disposed circumferentially opposite to the 60 hole I01. In operation, the alternative valve unit func tions .in substantially the same manner as pre- viously described. Some of the air from the ' equalizing chamber I03 escapes directly through 65 combination, a storage tank, a compressor re siliently mounted thereon, a discharge line on said compressor, a check valve in said storage tank, a resilient coupling connecting said dis charge line to said check valve, and resiliently a small hole IIO, but the major portion is forced . connected means to unload pressure from said and coupling. to pass out the hole I01, thence around the line 4., In a device of the character described, a annular passage formed by the groove I05, and compressor having a closed crank-case, an inlet ?nally out at the slot I08. By the restriction pipe, means attached to said inletpipe to silence and labyrinthine passage of the air from cham ber I03, pulsations and drumming are eliminated the intake of air to said pipe and to ?lter said air, and a breather pipe leading from said crank as previously set forth. case into said inlet pipe between said means and The crank case III of the compressor 35, Fig said compressor. , ure 1, is not provided with the usual atmospheric 5. In a device of the character described, an breather, but instead a pipe II2 leads from the air compressor having a. discharge line and " crank case to a tapped boss H3 in the inlet el 2,186,098 means to unload pressure from the same, a stor age tank, and a check valve unit connected to said line and secured to said tank in sealing relation, said unit comprising an elongated body projecting into said tank, a check valve in said body within said tank, and means in said tank to retain said valve in said body. 6. In a device of the character described, a. dis charge check valve unit comprising a body having 10 an inlet passage therethrough, a closure cap on said body and forming therewith an enlarged ex pansion chamber at the inner end of said pas sage, said cap having a constricted outlet there through, a resilient seat ring in said body sur 15 rounding the entry of said passage to said cham—" ber, a valve disk guided in said chamber, and a spring urging said disk against said seat ring, said cap having a circumferential groove with stepped sides and a hole connecting said groove with said 20 chamber, and including a snap ring disposed in the outer step of said circumferential groove, said snap ring having a slot spaced circumferentially from said hole whereby an exit from said cham-' her is provided through said hole, around the inner step of said groove and through said slot. '7. In an air compression device, in combina-‘ 5 tion, a storage tank, a plurality of resilient pads secured to said tank, a compressor base mounted on said resilient pads, a compressor on said base, said compressor having an inlet pipe and a closed crank-case, means on said inlet pipe to silence 10 the intake of air thereto, a breather tube con necting said crank-case to said inlet pipe be tween said silencing means and said compressor, a discharge line on said compressor, a check valve in said tank, means including a resilient 15 coupling connecting said discharge line to said check valve, means to silence the discharge of air through said valve into said tank, and unload ing means to release the pressure from said dis charge line. 20 LINDSAY H. BROWNE.