US1789395A - Pump for refrigerating apparatus - Google Patents

Description

Jan. 20, 1931. o. M. SUMMERS PUMP FOR REFRIGERATING APPARATUS Filed Feb. 29, 1928 M w v r 2 fl =g c w, M2 1% a i/ V 2.5. %W

. INVENTOR.

A TTORNEYS.

which can lee-manufacturedwithout ent invention will-be apparent from the follorwing olescription reference-being hadto the Patented Jan. 20, 1 931 e ea s armeemame er eeeI Application filed February'29, 1;)281' Serial IyTo. 257,818.

more particularly the outlet Valves used for cempiessors and the'l ike; I a

It-is one of the ;ob]eot's" ofthe'i-nventlonto provide an improved va' lveplate which is formed of asinglestamped-member.-

"ltis another object oftheintention-dosimplif-y the construction and-to reduce the {cost of'manufactrlreof the;valve plate.

It-is a further object of the invention to withamini-mum ofrexpense and difficulty and grinding or special finishing operations.

"IVith-these objects in view the invention contemplates providing arr-improved valve plate which is stamped or punched out of a single-sheet of metal in the mannerhereinde scribed;v

. Further-obj ec'tsand advantages o f-the-pres accompanying drawing, wherein a preferred form of the present invention "is clearly shown.

;I n thedrawingszprovedvalve platexqf the invention mounted.

inposition .inacompress-or -'F-ig.; 2 r-shows a- :top viewiof the valve plate' itselfpand Listen-enlarged cross-section of a sectionthrough the compressor and the-valveiplatea J In theicon'striictionzof compressors, particularly ofithetypelus'ed in mechanical nefri'gera-tons, it is customary .to mount thei-outlet valvesathereof son .pl-ates'which are clamped :hetweenthe'head ofkthe cylinder and the bodyjqthereof... Suchfyalve plates are generally. imade. ofcast'iron and it is a always necese sany lto machinezithe sunfaces of such plates Very accurately, particularlyiatqthe: points. gwhere the valveszare mounted-and atgthe portionsof the plate clamped between the head and the body'ofsthe cylincler. Such machining operations are .relatively: expensive 7 and it an object of the present. invention QQ;toiqbgviatethesnecessityfor suchwork; p v

- of-alange sheet; Thissheet ShOLtllflIilVfitWO 7 body and-=;l1e-ad. Thisouterprojectingsem Another-problem confrontingthe-designers v of compressors; is thedissipation of heet qoaz mnom r .DAYTON, .0310, A COBPORAHONQF DELAWA E caused by the compression of th'exgas? In 1 general this has been taken care of by the provision of-fins onthe compressor-body and head UndenheaVy loads, the --fins" have not always beensu -fiicient and the'compressor'has become hot around thevalVepl ate diie-to=h=igh head pressures and hot-oil; l his *heat, pressure and oil has sometimes affected thex gaskets around the val-veiplate. 7 provide a valve plate which can be installed -Tghe improved valve plate of this invention isqnadepfa piece of sheet steel of suitable, thicknesswhioh ispunched or stamped out plane-surfaces-so that the necessity for ma chining the-sameis obviated. The punching. orlstam ping operation isneces'sarily made by 1 a very powerful maohine." The force with" which the valve plate is separated from the sheet of steeLea-uses' a deformation about the edge of the va lVe pl-ate; One of the chief objects of" this invention therefore consists in so punching the yal-veplate out ofia sheet: of" steel that the portions thereof which maybestrainedor deformed during the punching,

f c operation lie oiitsideof the l-imits-jof the-sar l showsa View in section of the imface constituting the Valve-retaining-portion and thepontionclampedbetween th'e cylinder tion of materialeonsti-tutes a heat radiating test place of 'the compressor duringoperation. .7 Beferriingiin detai l -to -the drawings, it willbev-obseriledfromlligs. 'lgand .8 thatthe valvefin projecting from what is normally the hotplate consists of a sheet metal 'memb'er 10 V which-,as shown gin jFigz; 2, ,isgstamped out in. the form of a su hstantiafly oval plate large I enough tor cov er the,cylinder ofacompressor. Intlie drawingsthe compressor, is TGPIEBSBDtBd-V V as having two cylind ers, 1 1" and 12 :in which 7' pistons 18" 14 operate respectively. Howeyen itlis obvious that the plate ofjthe n el' ii app ica l to .s ge ylmde 1" to a plurality ofcylinders' and that it may have any shapecorresponding to such cylinders, Thelate may be of any suitable thicknessyaltho by' Wa 'yx ().fillustration- Z inch may i be considered preferred dimension. This 7 thickness oflA inch i's'approziimately half'of the safest thickness allowable with a cast iron plate due to the possibility of blow holes in the cast iron.

A head member 15 isprovided which is clamped to the cylinder bodies by means of suitable bolts 16 which pass through the head 15, theextremity ofthe valve plate 10-and into the threaded portion 17 of the cylinders. The stressed or deformed portion of the plate lOextends somewhat beyond the walls of-thecylinder and forms a projecting fin- 18 which aids in radiating heat in a manner analogous; to the fins 27 on the cylinder body. *"This'pro jecting fin 18 is integral with interiorof the plate located in the hottest place o'f'the conipressor. The compression of the gas and the hot oil createquite ailarg'e amount of heaton the plate just above the pistons and the fin 18 allows a direct conduction to the outside air. This fin projects outwardly from the/exterior of the cylinder body and may slant down-- wardly as shown in Figs, 1 and 3. This downwardly slanting portion represents the amount of deformation produced during the.

stamping ofthe valve plate from a sheet of metal and it is the purpose of the invention;

to mount the valve plate in such a manner that'this deformed or stressed portion lies outside of the compressor itself so that only the plane and unstressed portions of the plate itself will come within theconfines of the cylinder. The amount of such deformation depends of course upon the nature of the steel used and the condition of the dies employed Its exact degree of curvature is of no consequence, but as shown in Fig.3 by the dotted line 19 which is a prolongation of the top plane surface of the valve plate the deformed portion maylextendoutwardly to a considerable extent. j a U The valve plate of the invention as'before described, is clamped between the cylinder head 15 and the body portions 11and12of the cylinder. Suitable gaskets 20 are disposed between the head and the plate and the cylinder body and plate. to prevent leakage.

The valve plate is provided withholes21 which are drilled therein to accommodate the bolts 16 which hold the cylinder head 7 and valve in assembled relation and is also provided with valve seats 24 formed by under cutting a recess 23 in the top surface of the valve plate and leaving projecting a seat 24 for the valve which should present plate and improper seating of the] valve.- The valve structure constituting valve reed 2 and spring -25, maybeheld to; the valve By means of the improved valve plate of the invention considerable economy may be effected in the construction of compressors. Not only .isthe necessity for costly machining operationsobviated but by using sheet steel a thinner plate may be used than is the case of cast iron. While the valve plate.

accordi'ng to the invention is more easily and 3 economically 'manufactured than the usual valve plate, yet one of its most important advantages isthefa'ct that it allows a direct conduction of heat from one of the hottest places in th e'interior of the compressor.

While the ,forms of embodiment of' the invention as .herein disclosed constitute a; preferred formit is to-be understood that other forms might beadopted, all coming within the scope of the claims which follow.

@Whatis claimed is as follows:

A Valve Plate for aycomPIessQI or the like comprising a flat sheet metal. plate stamped out of a sheet of metal and having valve seats formedithereon arrangedtoflbe covered by valves and being shapedito be mounted between the cylinder head and the cylinderbody of a compressor and having :the zone of deformation caused ;by said.

stamping" operation located outside of I the effective valve plate area and constituting a heat radiating fin. o

2, In a compressor, a stamped sheetvmetalplate arrangedtobe interposed between sur faces having the same shape as the opposed. sides of the plate, saidplate having its zone of deformation which is caused by the stamp; ing thereof, disposed'beyond the engaging area of the plate and such surfaces and con-4, stituting aheat radiating-fin. j Y a 7 H '3. In a compressor orthe like, in combina-a tion, a cylinder, a head for said cylinder and a-.valv,e'plate clamped between said headand said cylinder, said valve-plate beingpunched out of a single sheet:of sheet metal and have ingvits zone ofdeformation extending utside of the efiective valve plate area-clamped between. said head andsaidcylinder,,said outside zone constitutinga fintforthe conduction of heat from said cylinder and head); 4.:-ln a compressor, in combination, a cylinder,-;a headfor saidcylindena valve plate: intermediate said cylinder andsaidheady means foruniting saidlread, said plate Land said cylinder ,into' assembled relation, said means being located adjacent thecircumference -of said .cylinder, said valve plate"hav'- ing a peri'pheral zone'which. is apt to be deformed extending outside 1 ofathe valve plate area included. between said head and said cylinder and arranged' to-radiate -heat from saidcylinder'andhead. i

5. In a'compressor, in combinationfa cylinderbody,;a head for said'cylinderyavalve plate intermediate said cylinder and said head, means for uniting said head, said plate and said cylinder into assembled relation,

said means being located adjacent the circumference of said cylinder, said valve plate having a peripheral zone of deformation extending outside of the valve plate. area included between said head and said cylinder, said deformed zone extending substantially beyond said cylinder and serving as a. heat radiating fin.

6. In combination, a cylinder, a head for said cylinder, a valve plate intermediate said head and cylinder, said valve plate being stamped from sheet material and having a portion of its peripheral zone of deformation projecting beyond the periphery of said head and cylinder.

7. In combination, a cylinder, a head for said cylinder, a flat valve plate interposed between said cylinder and said head, said cylinder and said head being provided with fiat surfaces engaging the fiat surfaces of the valve plate, said valve plate being stamped out of a sheet of metal and having its zone of deformation due tosaid stamping operation disposed beyond the engaging surfaces of said head and said cylinder.

8. In a compressor having a cylinder, means for dissipating heat of compression including a thermally conducting plate extending from within the cylinder outside of the cylinder and remote from parts adjacent the plate. 7

9. In a compressor in combination, a'cylinder, a discharge chamber and a partition separating the cylinder and chamber, said partition having a passage therethrough and being of metal of high thermal conductivity and having a portion extending outside of the cylinder and remote from parts adjacent the plate.

In testimony whereof I hereto affix my signature.

oT'ro M. SUMMERS.

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