Патент USA US2118234код для вставки
May 24, 1938. H_ E, Rupp 2,118,234 RECIPROCATING LIQUID PUMP Filed NOV. 20, 1936 20 19 76 I7 INVENTOR. BY Herbe/‘ú E Rupp ATTORNEYS, ~ Patented May 24, -193s _ n .2,118,234z UNITED >STATES. PATENT --OFFICE . 2,118,234 nacirnocATING LIQÚm PUMP . ‘f Herbert E. Rupp, Mansiìeld, Ohio, assignor to Gorman-Rupp Company, Mansiield, Ohio, a corporation of Ohio Application November 20, 1936, Serial No. 111,910 13 Claims. (Cl. 103-203) This invention relates to liquid pumps and body proper, and the plunger opening into the more particularly to pumps of the reciprocating water passage having a. valve-controlled air-re type, having- reference to improvements inthat lease vent connection with, or opening into, the class of such devices, commonly known as pres air chamber or space. sure and suction pumps, wherein one or more In the illustrative construction the pumping chamber is formed in fa lower casing l, having an inlet passage 2 and a discharge passage 3, which plungers actuated by a drive transmission are operable on water with a high pressure head or force. ‘ - One of the objects of the invention is to pro 10 vide a pump in which the crankshaft or other means of translating rotary motion into recipro catory motion is superimposed over the plunger , latter are shown in extension from the sides opposite each other at different or stepped levels. The inlet passage is controlled by a valve 4 and 10 the discharge passage is controlled by a valve 5, both of the same being preferably one way self seating valves. Above each of said valves a plug or water end of the structure and~a lubricating system is incorporated therein whereby the mo ' cap 6 is advantageously fitted into _hand-holes 15 tion changing mechanism operates partially sub merged in the lubricant and the entire working mechanism is automatically and thoroughly lu bricated. _ Another object is to provide means in the struc tural organization of thev pump for constantly and without any manual attention relieving the same of any air or gas that may enter thereinto and so eliminate the possibility of any air accumu the casing walls for cleaning, repair or replace ment. Between these two valves and the pas sages controlled thereby a plunger, or plungers, , 1 working through the casing top extends down wardly into the central space or pumping cham ber 8 formed therebetween. A plug-cap 9 fitted 20 into an entry hole in the bottom of the casing opposite said plunger provides for expedient ac which cess thereto for adjustment or replacement, as will be later described, as well as a means of A further object is to provide for the pump air clearing out the pumping chamber space. This arrangement permits solids which are heavier than the pumped liquid-and which are almost invariably picked up and carried thereby lation v25 provided to afford ready access thereto through or . counter-pressure generation might impair its effective operation. chamber to be replenished continually with air, which is more or less subject to absorption in all liquids under pumping action and is of course nec 30 essary in the regular and proper operation of all pumps of the kind. Other objects together with some of the par into the pump-to drop ~laway from the plunger 30 and more particularly from the packing, later described, therearound so as to keep the same ticular advantages of the invention will be set free from the impact and wear and from the scor forth in the following description with reference ` ing which usually results from such solids or other 35 to the attached drawing, wherein one practicable foreign matter entering with the liquid stream, 5 embodiment of the same is illustrated in the necessitating costly repairs. It also enables the casing and its passages to ybe easily and expedi somewhat conventional character of a pump in tended for heavy duty use. - tiously freed of any solid or foreign matter that In said drawing: might become lodged therein, in addition to The single figure is a vertical or longitudinal l affording ready access to the several working 40 section representation of the pump as viewed parts named. The aforesaid plunger 1 is surrounded by a from one side, a portion thereof, seen in elé'va tion, being broken away fragmentarily to reveal packing I0 ñtted into a stuffing-box recess formed a part enclosed thereby. in the top of the casing just above the plunger Broadly the, invention consists of a- closed opening thereinto, and this packing is held by a gland-plate I I shown bolted to the casing top. A crankshaft mounting on or over a plunger cylin der opening downwardly into a valve-controlled central counter-bore or channel I2 formed in said waterlpassage having an offset air chamber or plate aroundthe plunger body,«being annular in space„` the crankshaft being connected with the this instance, provides for any water that may plunger through a sealed bottom portion of its leak up past the packing to be retained there- 50 casing and having a crank-arm guide or piston within and so form an effectual seal against the. member working in said bottom portion so as to force lubricant- upwardly through a take-off side ' 55 wall conduit into jet discharge upon the crank throw and bearing and back into the casing admission of air down along the plunger on its suction'stroke. Now various pumps of general construction somewhat similar to that thus far described have been produced and proposed. But ' 2 r - 2,118,234 none of these, insofar as this applicant is aware, withv air which is constantly being absorbed by has been free of or eliminated certain objection the water under pumping operation, especially when -the air and liquid are under great pressure. impair the full efficiency and satisfaction of op This continual supply of air to the air chamber, eration oi' such pumps. One of these factors is of course, maintains the volume of separated air the collection and continuing presence of air ' therein suillcient to maintain an effective cushion. around the plunger at the point or regional space Adjacent to the air chamber, a gauge tube I8 of its entry into the pumping chamber, due to the » is advantageously fitted in corresponding lateral able and undesirable factors or conditions which location of said plunger in relation to the dis 10 charge valve. This air collection in the top space extension from the discharge passage 3 (or 3B). 'I'his tube may be secured and rigidiiied by passing 10 . thereby setting up a counter force or 'action that 15 seriously aii'e'cts and destroys the pump effec tiveness. It has presented a problem of practical ment has the advantage of putting the gauge up lwhere itÍ will be readily visible for reading, and 15 the air chamber will be free from any tap holes of the pumping chamber is objectionable, because through a lug I9 provided on the upper end of saidv air compresses on' the discharge stroke and the air chamber and is fitted with a pressure expands on the suction stroke of the plunger, ' gauge 20 onv its own upper end. This arrange operation which the present invention is intended to remove and which it does remove by a very simple expedient. 20 From the upper space 8* around the plunger an auxiliary passage I3 connects with the air chamber I4, usual to pumps of this type, which latter is in lateral open connection at its bottom with the main discharge passage 3 as by an ex which might be the cause of air leaks should the gauge be fitted in the top of the air chamber as is usually done. « ' Fromv the foregoing it will be readily appre ciated that the structure and organization de scribed serves two purposes. Firstly, it keeps the pump free from air. Secondly, it keeps the air chamber charged with air to form and maintain tension or joint piece 3‘ thereof. Said auxiliary an effective cushion, and incidentally it serves the third purpose of guarding this cushion of air against any possible escape. The air which is pumping and air chambers, the check-valve being '.unavoidably drawn into the pump through the arranged after the cock or nearest to» the air suction line is forcefully and eifectually expelled passage is provided with a check-valve I5 therein, and also with a relief cock I6 intermediate the 30 chamber. Associated with said cock is another check-valve I‘I advantageously formed in unit assembly therewith. The purpose of these two check-valves and the cock will be made present ly to appear. The aforementioned valve 5 con trolling the main and normal discharge passage is made to offer enough resistance to the pumped through the auxiliary# passage either by carriage with 4some of the water or by the pressure action of the water body thereon under action of the plunger. This air is discharged into the air chamber without/ possibility of reentering or back pressing into the pumping chamber and serves to continually supply the air cushion desired and liquid to cause some of the same to pass through necessary to maintain in the air chamber so as the auxiliary passage I3 with operation of the pump, thereby carrying away from the top of the to make up for the air loss therein from_ ab 40. pumping chamber any air that may collect or tend to accumulate therein and discharge such air into the air chamber. Said air chamber is of' a size' to assure that the iiowof liquid thereinto is so low that the air and water will separate, the air 45 going up to form an effective cushion, and the water passing on into or through the main dis charge 3. It will be understood that any dis~ charge taking place through the auxiliary pas sage I3 will have the same result and produce the 50 same effect regardless of its cause, that is, whether it is caused by the resistance of the valve 5 or sorption by the liquid fiowing through the normal discharge. 'I'he practicability of this means of 40 eliminating the interference of such air with the pump action and the improved result obtained Y therefrom will be realized and readily appreciated by anyone versed in this art and acquainted with the diihculties met in actual vutility of such 45 pumps. Another problem encountered in the use of. pumps of this type wherein the water end is below the motive mechanism is the retention and cir culation of lubricant to properly and adequately lubricate the moving parts. This has presented 50 by the presence of air in the pumping chamber. another problem of practical operation which the When first starting up the pump, and there be present invention is intended to remove and which ing pressure in the discharge line, the cock I8 , it does remove by a very simple improvement 55 is opened toallow the air to discharge to the 1 in the structure and organization of the pump. 55 atmosphere so that it cannot be compressed The pumping plunger l'is connected not with upon the discharge stroke of the plunger _and ex a crank arm direct, as ordinarily, but indirectly pand again on the suction stroke thereof. In stead, the ‘liquid being pumped will be drawn through a guide or extension member 2I co-axial through the intake valve 4, and such air or gas as therewith. Said connection is effected in this in stance by a bolt 22 extending through the plunger is drawn- along with it will be subsequently ex pelled in the same way. 'I'he check-valve I‘I as sociated with said cock prevents air being drawn in on the suction stroke of the plunger and this 65 cock is vkept open until the air or gas has all been discharged and the pump has picked up the more solid liquid for continued pumping. Thereafter the cock may be closed and any air entering the pump in its succeeding normal’operation, either 70 by lndraft or presence in the water through leak age or otherwise, will be constantly carried and passed off through the auxiliary passage I3 to discharge into the air chamber Il. The check valve I5, of course, serves to prevent any back 75 now. Thus the air chamber I4 is kept supplied and having a threaded upper end engaging in said member 2| and a threaded lower e`nd en gaged by a retaining nut 23 holding it clamped tightly into place. Incidentally, this affords an easy means of removal or replacement through the hand hole opening in the bottom of the pump casing closedA by the plug-capl 9, which is made largel enough to permit the plunger to be drawn therethrough. 'I‘he needlof removing, looseningv or disturbing other parts of the pump is thus 70 eliminated, which is a very desirable advantage. The said guide member. 2I is pivotally connecten at 24 with a crank arm 25, which in turn is conventionally connected with a crank shaft 26 75 ' 2,118,284 or other means of translating rotary into re ciprocatory motion. - y Said’crank shaft. crank arm and guide mem ber are enclosed by Aan inverted crank case 21 in which the crank shaftjs journalled and which is itself mounted on the pump casing below. Its lower end is, of course, Walled or closed over ex 1 cept for an opening for said guide member there through. This opening is fitted with a stuilìng 10 box 28 surrounding the guide member so as to allow it to move up and down freely, but effectu ally seal the opening against .oil leakage. The lower portion of _the crank case, constituting the connection. with the latter for such purpose. The gear 31 is thereby caused to rotate in a pool of the oil. With rotation it will, of course, pick up some of the oil between its teeth, and by cen trifugal action will throw the picked up oil out .ward against the inner periphery of the gear case. -Such of the oil as is thrown against the l back wall of the case drains to a trough 38', indi cated in dotted lines, and this trough inclines downwardly to an opening 39 back into the crank 10 case above the level of the aforesaid overflow opening 34. Thus the gear case is adapted and _utilized to` serve as a lubricant supply reservoir sump chamber or area thereof, is formed as a keeping the oil in the crank case to a level such cylinder 218l in which the aforementioned guide i as to overflow continuously into the gear case member 2| moves. Fitting into this cylinder, the stood that in the-filling process, some of the oil enlargement of the same, guided by the cylinder member and fill or partially fill the cylinder space therebelow so that the crank case is substantially 20 ñlled from the bottom to the upper- level of its overflow hole and none of the oil pumped out of the cylinder space by the piston member is actu 20 walls. ‘ Enough clearance is allowed between said piston portion and the surrounding cylinder to permit oil to work or pass therearound into the space below, which accordingly becomes filled, the bottom face of the piston portion being formed with a peripheral lip or downwardly ex tending edge 29 serving as a drip. Said guide member’s aforesaid pivotal connection 24 with the crank arm is very expediently effected- within this piston portion in the manner of the ordinary 30 crank arm and piston connection. Extending upwardly from the bottom of the cylinder and aforesaid sump chamber of the cas ing is a side passage or channel 30, having its upper end 30“ opening and directed toward the 35 crank shaft and its throw. This passage has a one-way check or flap valve 3i therein serving to prevent any of the discharge therethrough from flowing back into the cylinder or sump space. - 45 55 60 through the aforesaid hole 32. It will be under guide member has a piston portion 2|. von the upper end thereof, formed in this instance as an A similar passage 32 on the opposite side will flow down past the piston portion of the guide ally lost to reduce the working level below that of said overñow hole. 25 _ In operation, the oil placed in the crank case seeps down along or past the piston portion 2W of the guide member as before stated, the clear ance between said portion and the cylinder wall in effect providing a passage between the upper 30 and lower sections of the crank case. The amount of oil which will thus seep down aroundl said' piston portion can be controlled by the close ness of its ñt to the cylinder so as to provide for the space below the piston portion to be con 35 tinuously ñlled or only partially filled during the guide member’s stroke action. The oil below said piston portion is forced out and upwardly through the pasasge 30 as the member descends, of the crank case extends upwardly from the cyl , so as to stream said lubricant onto the crank shaft inder from a level somewhat above that of the and connected members as previously described. first-named passage, and has its upper end 32a This action on the oil is promoted yif the space opening into the crank case above the corre below the piston portion is only partially filled sponding opening of the first passage. Oil which with oil, so that air is drawn freely thereinto has entered the cylinder space below the piston down through the passage 32. Air so taken in portion of the guide member is thereby forced will become trapptd between the piston portion upwardly through the first-named passage 30 and the oil level as the piston portion closes over upon downward movement of the member, so the lower end of said passage 32, and being then as to discharge a stream of the lubricant onto compressed will act with a strong blowing action the crank shaft, its throw and connecting rod upon the oil therebelow so as to drive it with bearing. From these parts the oil, of course, considerable force up the passage 30. Converse drips down onto the top of the piston portion 1y, on the upward stroke of the guide member a within the upper section of the crank case. -partial vacuum will be created in the cylinder Through the second-named passage 32, air from below the piston portion, tending to draw a fresh the top portion of the crank case will be supplied supply of air down through the passage 32 and at to the cylinder space below the piston portion the same time to also draw more oil from the of the guide member so as to be drawn thereinto upper section of the crank case down into the as said member works up and down. The air so cylinder so as to provide a fresh quantity or drawn into said cylinder space will be -trapped charge to be blown over the crank shaft as be between the lower ends of the passages as the fore. This action» repeats continuously as the >guide member travels downward and this trapped guide member is moved up and down by the crank air being thus compressed by the piston part of the member>will literally blow the oil thereunder through the first-named passage so as to main 85 tain a continuous jet of lubricant discharge onto the working parts above. Thus a continual cir culation of lubricant is assured automatically by the operation of the pump. Oil is supplied to the crank case through an 70 opening in its top normally closed by a plug 33. It is filled to the level of an overflow hole 34 in one side. This overflow hole empties into the gear case 35, and fllls also the latter to a pre . determined proper level which will be advan 75 tageously indicated by a gauge 36 provided in shaft. 40 45 - 50 55 60 ’ As the oil is thus, in operation, continuously drawn from the upper into the lower section of thecrank case and expelled back vagain thereinto, 65 thereby tending to keep the oil level uniform _in the upper section, some of it simultaneously overflows through the opening 34 into the gear case 35. 'I‘here it is picked up by the rotating gear and carried around to drop into the trough 70 38 and thereby feed back again into the crank case, thus effectually maintaining a lubricant supply reservoir to the crank case and assuring that its level remains substantially constant. A continuous circulation of the lubricant is accord 75 4 2,118,234 ingly maintained upon al1 of the parts, so as to _ *I , Having thus described my invention, what I keep them thoroughly andadequately lubricated, claim as new and desire to secure by Letters Pat the crank shaft, crank throw and bearing being supplied by the discharge jet through the pas sage 30, the driving gear being supplied by its ro entiof the UnitedStates is: tation in a generous oil bath, and the crank arm controlled admission passage and a valve-con trolled discharge passa e, a reciprocating plunger operable in said pùmpin chamber, an air cham ber connected with said discharge passage, an pivot and piston portion of the guide member be ing constantiy'submerged in oil. Tl‘le flow cycle or circulation of the oil is, of course, continuous during operation of the pump and all of thework ing parts .are very thoroughly and generously supplied with the lubricant. It is necessary merely to be sure that the crank case is initially filled to the proper level as will be indicated by the gauge 36 in connection with the gear case.V It will be noticed that the stumng-box 28 _of the l'illustrative construction is so constructed that it will not be required to stop oil' any of the oil, or any more thereof than is splashed or -adheres onto the guide member which extends there through into connection with the pumping plung ' 1. A reciprocating liquid pump, comprising in combination, a pumping chamber having a valve auxiliary discharge passage connected between the pumping and said air chambers from the region of the former wherein the plunger limit of retraction is situate, and means in said auxili ary passage for controlling the discharge there through alternatively into the air chamber or direct to thevatmosphere. l l2. A reciprocating liquid pump, comprising in combination, a plunger cylinder and a pumping space into which the cylinder opens downwardly, . a plunger vertically reciprocable in said cylinder, 20 that are required to lubricate pumps >of this na a valve-controlled liquid inlet‘ to said pumping .' space, a valve-controlled liquid discharge from said pumping space, an air chamber com municating with said liquid discharge, an aux iliary valve-controlled discharge passage between ture, which tend to stick to the‘member passing therethrough and pass with it through‘the boxl from the upper region of the former adjacent to ~ er. The reason for not subjecting the stuff ing-box to the necessity of stopping the oil is due to the high viscous qualities of most lubricants said pumping space and _air chamber extending so that some of it will be wiped off by the packing said plunger, and means for reciprocating the on the up stroke and consequentlywasted. On l plunger Áfrom a. position thereabove. 3. In~ a reciprocating pump, comprising a the other hand, if the packing is drawn. up tight plunger, a pumping chamber into which the enough to wipe oil.' the heavy lubricant, an un necessary friction is set up, thereby wearing the plunger is operatively projected, a valved inlet packing excessively and consuming more of the passage to and a valved main discharge passage power of the pump. It is, of course, necessary to from the pumping chamber, a secondary passage employ a stuiling-box strong enough to with stand the oil pressure from the descending piston portion of the guidel member, but it. should not be required to stop oil' any of the oil if the best separately connected between the pumping cham ber and the main discharge line therefrom behindand above the valve in said line for discharging from said pumping chamber the lighter liquids or results and highest eñìciency of the pump are to be obtained. It is suiiicient for it merely to pre vent the loss or wastage of oil through the pack gases that the pump may be pumping. 4. Ina reciprocating pump, including a plung 40 er, a pumping chamber into which the plunger operatively extends, a valved inlet passage to the chamber and a- `valved main discharge passage from said chamber, a secondary independent pas mg. _ 'I'he carriage or other base upon which the en tire pump unit is mounted has not been shown, but it will be understood, of course, that it is in tended to'be placed on any suitable mount, either for portage or fixed operation, this constituting no particular part and being of no importance to the invention itself. A greatly improved pump construction is thus provided. Not only is the major efficiency of this type of pump attained and assured by the pro vision for eliminating the collection or presence of air in the upper part of the pumping cham ber which deleteriously affects the pump opera tion, but it also attains and assures a thorough lubrication of all the working parts by the pro vision for a complete and generous lubricant » circulation without the necessity of any attend ance. The invention accordingly produces a novel working organization and makes a distinct advance in the art. It will be understood that this invention may . be embodied in any number o1' different forms sage separately connecting from said chamber to 45 the main discharge line upon a level above the main discharge passage and at a point behind ' the valve in said passage for discharging from the chamber the lighter liquids or gases otherwise accumulating therein. 50 5. In a reciprocating pump, including a plung- i er, a pumping chamber into which the plunger operatively projects, a valved inlet passage to the chamber and a valved main discharge pas sage from said chamber, a secondary independent 55 passage connected separately from the pumping chamber to the main discharge line Ybehind and at a level above the valve in said line for dis charging from ‘said chamber the lighter liquids or gases drawn thereinto, the said secondary 60 passage extending from that section lof said chamber wherein air or gases would otherwise tend to accumulate so as to render the pump “air bound”. ` ' 6. In a reciprocating pump, comprising a distinguishing from that here illustrated and described, and that various combinations and pumping plunger and a pumping chamber into sub-combinations and changes in the form and which the plunger is operatively projected, the arrangement of the parts can be made to suit latter having a valved inlet passage and a valved different types and organizations of pumps of main discharge passage, a secondary discharge passage from said chamber discharging into the 70 70 this same general character, without going be main discharge line behind -and above the valve yond the actual scope and spirit of this inven in said line, said secondary passage serving for tion. Therefore, the appended claims are not in the discharge therethrough of the lighter liquids tended to limit the invention to the speciiic con or gases drawn into the pumping chamber and struction, arrangement, organization or combina .having therein means for permitting such dis 75 tion illustrated and hereinbefore described. Il amaca-i charge to occur either into the main line or di rect to the atmosphere. ' ' 7. In a reciprocating pu’mp, comprising a pumping plunger and a p ping chamber, the latter'having an inlet passa e thereto and a dis charge passage therefrom, a secondary discharge passage from said chamber discharging into the main discharge line through a reduced pressure area, said secondary passage serving for the dis 10 charge from said chamber of the lighter liquids 5 or alternatively to the atmosphere. ` l1. In a reciprocating pump, including a plung er, a pumping chamber having a main inlet pas sage and a main discharge passage, together with an air chamber communicating with'said dis charge passage, a secondary discharge passage connected between said pumping and air cham or gases drawn thereinto and having means -forj bers so as to discharge from the former to the .allowing such discharge ‘either directly into said latter, said secondary discharge passage having reduced pressure area or to the atmosphere. 8. In a reciprocating pump, comprising a pumping plunger, a- pumping chamber having an means therein for discharging directly into the air chamber or alternatively to the atmosphere, and means of preventing a discharge-from the air inlet passage thereto and a main outlet passage chamber to the atmosphere. therefrom, together with an air chamber con nected with said outlet passage, a secondary dis charge passage connected between said pumping 20 and air chambers for discharging from the former the lighter liquids or~gases drawn by suc tion thereinto, and means inN said secondary pas sage for directing the discharge therethrough into said air chamber. 25 _ discharge from the former to the latter, said secondary discharge passage having means there in for discharging directly into the air chamber ' 9. In a reciprocating pump, including a plung- er, a pumping chamber having an inlet passage and a main discharge passage, _and an air cham ber connected with'said discharge passage, a sec ondary discharge passage connected directp be' region of the former adjacent to the plunger, the said secondary passage containing means con trolling its separate discharge into the air cham ber and means vof preventing a reverse ñ'ow of ‘ . - ‘ plunger, a pumping chamber having an inlet passage thereto and a main discharge passage therefrom, together with an air chamber con 20 nected with said discharge passage, means sepa rate'irom and independent of the main discharge pesage for discharging directly from the’pump ing chamber tó said air chamber any air or gas , entering into the former from the pumping 25 action. ' ~ 13. A reciprocating liquid pump, comprising in combination, a pumping chamber having a valve-v controlled inlet passage ~and a valve-controlled 30 tween said pumping and air chambers from a the discharge therethrough. ' 12. In a reciprocating pump, comprising a ' Y l0. A reciprocating pump, comprising a plung er, a pumping chamber having a main inlet pas jadjacent to the plunger, and means in said auxi sage and a main discharge passage, an air cham iliary or secondary passage for controlling the discharge therethrough either direct to the air ber connecting with said discharge passage, and chamber or to the atmosphere. , ' a secondary ’discharge passage connected be tween said pumping and air chambers so as to 1 outlet passage, a reciprocating plunger operable 30 in said pumping chamber from above, an air chamber connected with said discharge passage, an auxiliary or secondary discharge passage con nected between the pumping chamber and said. air chamber from 'the upper region of the former 36 40 HERBERT E. RUPP. .