US2548738A - Pump unit - Google Patents

Description

J.` J. ORLICH EI'AL April l0, 1951 PUMP UNIT 4' Sheets-Sheet 1 Filed oct. 9, 1947 INVENTOR JOHN JORUCH A By HERMAN A.O RLICH ATTO 6 April 10, 1951 J. J. oRLlcH A:zT/M

PUMP UNIT 4` Sheets-Sheet 2 Filed Oct. 9, 1947 mvg/mm JOHNJORLICH By HERMAN AoRucH April 10, 1951 J. J. ORLICH ETAL PUMP UNIT 4" Sheets-Sheet 5 Filed Oct. 9, 1947 on m WHU www IMA .N .um mm JH y B ATTOR April 10, 1951 J. J. oRLlcH ETAL PUMP UNIT 4'Sheets-Sheet 4 Filed Oct. 9, 1947 /NvEA/TOR JOHN J.0RL|CH i 5furrow/E H E m O. A N A M R E H y B Patented pr. O, 195i UNITED STATES PATENT GFFI'CL John J. Orlich and Herla A; Orlich,`

Philadelphia; Pa".

ppl'icaton octoisfs, 194i, .Seriana 778,848'

to an end thereof, and astroke regulator' andr pump' cylinder and valve chest are aligned with one another on the opposite side ofthe base adjacent to the opposite end thereof. TheV electric motor andstroleregulator are aligned trans-v versely ofthe base and the stroke regulator' is pivotally connectedv with ay crankA rotatable byv the stroke regulator andl with a piston reciprocable in the pump cylinder.

TheV stroke regulator is preferably housed in a frame mounted on the base and having spaced Walls and a top cross'pi'ece.` The frame hasY fulcrumed thereon a lever preferably con`` sists of fa pair of L-shaped members having trunnions adjacent to the upper ends of the longer legs thereof and journalle'd inv the'upper'portions of the frame walls. The shorter legs of.` their' shaped members are pivotally connected, through a connecting rod, with a; crank rotatable bythe speed reducer to impart oscillations of constant Astroke'tothe lever;

A shaft is journalledY inthe frame'head, with its axis intersecting` the axis of the lever, andincludes a depending flexible section'andfascr'ew-r on'uwhich is suspended a head movableby' the screw along and operatively connectedwith the lever; preferably by a spline connection formed by a slideway and slide. The headV is pivotally connected, through a connecting rod, with the pump 'piston which is thereby reciprocated' in a boreV or chamber'in the cylinder.

The exible joint of the shaft permits the' oscillation of the screw section thereof with the lever and the rotation of the screw during the' oscillation ofthe lever and in any position thereof; The turning of thev screw movesVv thefhead-V suspended thereon towardf or froin'the axis of oscilA lation of the lever to vary the throwof the conL necting rod and piston 1 connected therewith;

The backward stroke imparted' to ther piston unseatsa-ball inletfvalve' connned between alpen' forateddisk and slotted cage in an enlargement` ofthe cylinder bore and` :fills the bore with liquidi On vthefforwa-rd stroke of thepiston,` thepressure: reseatsthe inlet valve and unseats" ball Valves,` controlling elux passages extending' normally tol the cylinder bore.

Tlie Drincipalaridcha cteristic fea'tuljesio our iventionfyarid them eref lmaking,const t' ing and using our iin'nove'djpuy i l ther appear' .frbmthe acqmrenymedrawigs f the fQlOW ldss'eiriiisin explaining the" bestimme in whichy We* have" crtempla'ted applying s'u'Ch priynciples:v

I-n the drawings lig.V l'f isy a perspective view of an hy'crraulic':V pump embodying our invenV tion; Fig. 2KV is# aperspective view of the pump unitta-ken from the end oppositeV that shown in Fig'. 1`;Fig. 3 isj a part-s'ectionah side elevation of the hydraulic pump unitvsrhown in Figs. 1 and' 2, with the pump piston and connected"V parts*Y retracted; Figi 4 is an exploded view of the compeinent parts ofthe stroke regulator? Fig. 5 is a part sectionaLsideelevation'similar to Fig. V3 but withthe parts advanced 180f"intheir operating cycle; Fig. 6 is a- .verticalv` sectional viewY takenV alongv` the line (il-6 of- 1;' Fig'. '7l is a vertical? sectionalY view talker-il alongfline 1-1"o'f`Fig'. 6;V Fig. 8 is an enlarged crosses'ectionalview taken along the' line 8'-8 of Fig. 2;*showingthe pumpy cylin-` der and checkvalve system. p

The embodiment f our ini/'eliifllonilllistratedl in the drawings einlio'dies afbase l` on Ywliicl'iJ are mounted the constant speed electric.' motor 2,v Speed reducer 3, stroke regulator fratrie 4`l and pump 5- n 'I-he'fmotor 2- is aligned with the speed reducer 3'- andsuppliesfthrou A-li` ash'aft lffpower for rotating the shaft 'l a The crank 8 isconnected, throughfaI connect-r ingr red-f s", wt'htn'stiere regni-stof mounted-'m the'frame 4. Thest'rekeregulator frame 4 is'y aligned, i reetinneanly' of:- th'e base', with' the pump 5 and, transversem Qi the base', within@A motor 2'. The Speed? regulator iS plftalily donnee-ted' through the .connecting redl l0, w`ith the re'c'ipvocable head ofi :1t-piste llziwhiqh ismovame thrOgh" the' packing Ir3`i`I1t` tk'bore |4 fl the pump cylinder' |25.

The stroke regulator comprises a p'aiiffof l;- slaped-fmember's"l'havingf the upp'eif portionsv of their" longer legs journalled'on tru-n" ons'l'l projecting inwardly rfronthe spaced? walls: or' standards 8 oi thefrariie 4'; The Ineinbers'l thus 'forn'alever ,LS1-"AP6 iulcrum'ed near itsvv upper endv on the/upper portion ofthe frame 4'. Tlfietransvers'e and shorter' legs ofthe members I'B are'pivotally' connected, through the pi'rtl'e IFS', With the-end" of` thexconn'ecting rod 9 so that theleve I6'-|'6 isfoscillated'afxed distance pro# portional yto the throw'ffthecrank 81-` A` shaftA 2li has a reducedprtion'journalled in" a boss 2| on the cross-piece 22 of the frame 4 and is rotatable by means of a handwheel 25 iixed thereto. An indicator ring 26, xed to the shaft 20, rests on the boss 2l, and indicates, with respect to a datum, the rotation of the shaft 2G. A lock nut 21 is threaded on the; shaft 20 to lock the shaft 20 against undesired rotation.

The shaft has a flexible section formed by a universal joint 28 and a threaded section or screw 29 depending therefrom.

A cross-head 30 is threaded on and suspended from the screw 29. The bifurcated end of the connecting rod Il! is journalled on cylindrical bearings of the cross-head 30 on opposite sides of the screw 29 and the reduced cylindrical ends of the cross-head are journalled in slides 3| slideable in slideways 32 formed in inner adjacent surfaces of the members I6. By loosening the nut 21 and rotating the wheel 25, the cross-Lhead 30 and connecting rod I0 may be moved toward and from the axes of the trunnions I1 `and thus change the stroke of the piston I2 to any desired degree during the operation of the apparatus. During the operation of the pump, the screw 29, lever l6-I6 and rods Sand I0 all oscillate about different axes. To slow or stop the operation of the pump, the head 3D may be moved toward or into alignment with the axis of the trunnions I1.

The cylindrical bore I4 has a flaring outer end 33 terminating in a threaded cylindrical seat 34 for a perforated disk 35and a ferrule 36 containing an axial aperture 36 having an enlarged section for receiving a cage 31 having a concave valve seat 33 and aaslotted cylindrical Wall 39 for retaining a ball valve 4II l a AA plugged drainr port 4&1 and discharge port 4l are rdrilled in the cylinder` I so as to 'intersectrthe bore I4. The port 4I -is controlled by a ball 42 seated in a -cage 43 havinga slotted cylindrical wall. The port dldischarges into a chamber 44 closed by a plug 45 having a stem 46 limiting the movement of the ball 42. The chamber 44 discharges through a passage 41 controlled by a ball valve 42' and cage 43' similar to the parts 42 and 43. 'The passage 41 discharges through a chamber 44 ,andvpassage 41 to the external fittingV 48.

The chamber 44 is closed by a plug 45 similar to the plug 45.

It will be understood that the; amountof liquid pumped and the pressure at which it is ejected is governed by the throw of the piston I2 in the bore I4 and that the throw of the piston is controlled by the stroke regulator. Y

Each revolution of the crank 8 is translated into linear motion by the pitman 9 which oscillates the lever IB-IB about the trunnions I1, a given amount in each direction. The throw transmitted by the lever Iii-I6 to the piston I2 varies directly with the distance between the head 30 and trunnions I1. f

To increase the stroke ofthe piston I2, the handwheel 25 and screw 24 are turned so as to increase the distance from the trunnions I1 to the head 30. The throw will be at a maximum when the head 3U is at the greatest distance from the fulcrum provided by the trunnions I1. Conversely, to decrease the throw lthe head .3Q .is moved upwards` towards the trunnions I1 by means of the screw 24. W'hen the head 30 Yis in line with the trunnio'ns I1, the throw of the connecting link II) and piston I2 will be zero. The universal coupling 21 connecting the handwheel 25 and screw 24 permits the adjustments of the head 30 to be made at any position of the lever I6--I E or while the pump is running. When'the desired adjustment has been completed, lthe 4 f head 30 is locked in position by turning the lock nut 21.

During the pumping stroke of the piston I2, the ball valve 4l) is tightly seated, whereas the ball valves 42 and 42 are unseated and the fluid is discharging around the balls and through the passages controlled thereby. When the piston I2 begins to reverse its motion, a partial vacuum is created in the bore I4. Whereupon the ball 42 and 42' will fall and seatand theV ball 4B will be drawn from its seat toward the apertured Washer 35. The unseating of the ball checks 36 permits the iiuid to flow or be drawn from the inlet pipe and lill the bore I4. As the piston completes the suction stroke, the bore I4 is substantially lled. As soon as the piston I2 moves forward again, pressure will be exerted on the iiuid by the piston which will cause the ball 40 to be seated. Increase of pressure will tend to seat the ball 40 more firmly. As soon as the pressure in the bore I4 is greater than that in the chamber 44the ball 42 will be unseated, allowing pressure to be exerted upon therball check 42. As soon as the pressure inthe bore I4 and chamber 44 exceeds that in the chamber 44', the ball check 42 will be lifted, permitting the fluid to Vpass to the outlet port 48. f

The twin ball checks 42 andA 42' permit pressure to be built up in two distinct stages resulting in a iinal discharge pressure through the outlet port` r48 of substantialruniformity. Asthe piston I2 comes to the end of the pressure stroke, the ball check 42 will reseat atgthe first indication of a diminution of pressure, whereas `the inner ball check 42 will not reseat until a substantially greater diminution of pressure has taken place. This resultsin both checks sharing the pressure loss, thereby permitting greater total pressure than would otherwise be possible with a single ball check as vwell as providing a greater margin of safety inproviding Yagainst leak backs to the cylinder.

It will'be understood that the clearance between the periphery of the cylindrical piston I2 andthe inner cylindrical surface of forward portion of the bore I4 (e. g. between the passage 4I and the flare 33) is suiiicient to permit flow of liquid therebetween when the piston .I2 is advanced beyond the passage 4I.

Having described our invention, we claim:

l. A pump unit comprising a motive member including a driving means and a speed reduc-` ing means, a piston member, a stroke regulator comprising a fulcrumed oscillatory lever with which said motive member and piston member are operatively connected, and'means for shifting the point of connection of one of said members to the lever relatively to the fulcrum of the latter ,including alignment of said point of connection and said fulcrum, said shifting means including a shaft having a threaded section operatively connected with said last named member. and a exible joint permittingV movement of said threaded section with said lever.

2. A pump unit comprising a-piston chamber, a piston reciprocal in said piston chamber, a frame, a stroke regulator housed within said frame,. said stroke regulator including a pair of L-shaped members having 'trunnions adjacent to the upper endsof the longer legs thereof and journalled in the upper portions of said frame, a head operatively connected with said longer legs and movable within and shielded by the same, a connecting rod connecting said piston and 'head,"a rotatable shaft journalled in the head of said frame and having a threaded section operatively connected with said head to shift it along said longer legs, said shaft including a exible joint between said frame and head, a motive member including a rotatable crank, and a connecting rod connecting said crank and the shorter legs of said L-shaped members.

3. A pump unit comprising a base, a motor and speed reducer in tandem along one side of the base adjacent to one end thereof, a stroke regulator and pump in tandem along the other side of the base adjacent to the opposite end thereof, said motor and stroke regulatorv being substantially in alignment with the shorter axis of said base, and a crank and connecting rod aligned with said stroke regulator and said pump and connecting said speed reducer and said stroke regulator.

4. A pump unit comprising a base, a motor and speed reducer in tandem along one side of the base adjacent to one end thereof, a stroke regulator and pump in tandem along the other side of the base adjacent to the opposite end thereof, said motor and stroke regulator being substantially in alignment with the shorter axis of said base, a crank and connecting rod aligned with the said stroke regulator and said pump and connecting said speed reducer and said stroke regulator, and a substantially non-flexible coupling aligned with and connecting said motor and said speed reducer.

5. A pump unit comprising a base, a frame having spaced walls mounted on said base, a pair of complementary oscillatory L-Shaped levers fulcrumed in Said Walls and having guide- Ways extending lengthwise alo-ng the longer legs of the adjacent surfaces of said L-shaped levers, a top cross-piece on said frame, a head movable along said guideways, a shaft rotatable within said top cross-piece for shifting said head along said guideways relatively to the fulcrums of said L-shaped levers including alignment of said head with said fulcrum, a power source operatively connected with one end of said levers, and a connecting rod connecting a piston and said head.

JOHN J. ORLICH.

HERMAN A. ORLICH.

REFERENCES CITED The following references are of record in the file of this patent:

, UNITED STATES PATENTS Number Date

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