US1565640A - Pump - Google Patents

Description

Dec. 15, 1925- 4 L. B. GREEN P-UMP Filed March 6, 1924 a sheets-sheet 1 Dec-15,1925- 1.565.640

' L. B. GR EEN' F'UMP Filed March a, 1924 6 SheetsSheet s a i/a.%m/

Patented Dec. 15, 1925.

"UNITED STATES PATENT or fice.

Lana. GREEN, or LAKEWOOD, onIo, assronon or ONE-Tami) no amt. JONES, or CLEVELAND, OHIO, AND onnr'rnmn 'ro cassxos 1.. rm, or omen, 01:10,

am) onn-rnian T connan n. xnausn, or cnnvmm, omo.

. Pour.

Application filed March 6, 1924. Serial No. 687,284.

T 0 all whom it may concern:

Be-it known that I, Lnn B. GREEN, a citizen of the United'States, and a resident of Lakewood, county of Cuyahoga, State of Ohio, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to pumps and more particularly to pumps for compressing gases 1n refrigerating apparatus. \Vhile the invention relates generally to pumps for re frigerating apparatus yet it has reference also to pumps especially adapted for use in connectionwith portable drinking-water -5 coolers for oflices and other places where the same are .used.

It is one of the objects of the invention to provide a pump of the valveless type that it will be quiet in o eration, simple in con- !0 'struction and so esigned that the parts thereof may be manufactured at a minimum cost by modern production methods.

It is a further object of the invention to provide a pump especially adapted to act 35 as a. com ressor for the refrigerating fluid without liability of pumping objectionable quantities oflubricant into the cooling system.

A further object of the invention is to 0 provide a construction in which the working partsare submerged in a lubricantwhich will not only decrease the wear to a minimum but will also insure quiet-running and a thoroughly effective seal against leakage r of the refrigerant.

Other objects of the invention and the features of novelty will be apparent from ,the following description, taken in connection with the accompanying drawings, of .0 which:

Figure 1 is a central longitudinal section through a )ump embodying niy invention,

the section eing on vthe'line 1 1 of Fig. 2; Fig. 2 is a horizontal section on the line 6 2-2 of Fig.1;.

. Fig. 3 is a vertical section on the line 3 3 of Fig. 2; and

"Fig. 4 is an elevation of one side of the Pump 0 Referring to the drawmgs, indicates a hollow base casting, open at the top and having secured thereon, by the bolts 11, a casing comprising the sections 12, 13 and 14 which are providedwith suitable flanges and secured together by bolts 15. The base 55 10 has a horizontal partition 16 near the bottom thereof in whichthere isa vertical bearing 17, the lower end. of which is closed by' the wall 18 so that "the partition 16 forms the bottom of the chamber in the base 10, and this bottom is entirely closed so that there is no possibility of leakage of lubricant therethrough. The section 12 of the casing, which is supported on the base 10, has a conical bottom wall 19 and an internal upwardly proectmg boss 20 which provides a s ace 21 for a lubricant, as will be hereina ter described more in detail. The bottom wall 19 may be other than of conical form but 70 1 prefer the form illustrated because it facilitates manufacture of the section 12 and yet provides the requisite space 21. A boss 22 projects downwardly from the wall 19, in alignment with the boss 20 andwith the bearing 17. A suitable bushing 23 is arranged in the boss 20 and has a horizontally extending flange 24 at its upper end. The bushing 23 acts as a bearing for the vertical crankshaft 25, the lower end of this shaft being arranged in the bearing 17. The shaft 25 is provided with a head 26, the lower surface of which bears upon the upper surface of the flange 24 and cooperates therewith to form an oil seal that'prevents objectionable leakage of lubricant from the chamber 21 downwardly along the shaft 25. A gland 27 is fitted in the boss 22 for the purpose of compressing the packing 28 which surrounds the shaft 25. The bushing 23, gland 27 and packing 28 thus form a stufiing box which prevents leakage of .oil along the shaft 25. The gland 27 is adjusted and secured by means of the studs 29 and nuts 30.

A worm gear 31 is keyed to the shaft 25- and a ball thrust bearing 32 is arranged between the gear 31 and the upper end of the bearing 17 to take the downward thrust.

The base 10' has formed integrally therewith the aligned bosses 33 and 34 (see Fig. 4), these bosses being provided with openings to receive the bearing members 35 and 36, respectively. The bearing member 35 is provided with a flange which is secured .to the end of the boss 33 by bolts 37 and the 'bearin member 36 is provided with a flange 38 t t is secured to the boss 34 by bolts 39. A horizontal shaft 40 is supported in thebearing members 35 and 36 and the latter is provided at its outer end with a stufling box 41 containing suitable packing 42 which surrounds the shaft 40 and prevents leakage of oil therealong. The packing 42 is compressed in the usual manner by means of the nut 43 and the outer end of the shaft 40 carries a pulley 44 or other suitable form of earing by which the shaft 40 may be rotaterf The shaft 40 has a collar 45 thereon against which one end of the worm 46 abuts, the opposite end of the worm being engaged by a ring 47 between which and the inner end of the bearing member 35 there is a ball thrust bearing 48. The worm 46 meshes with the worm gear 31 so that the shaft 25 is driven by the shaft 40.

The casing section 13 is in the form of a hollow disk containing a chamber 49 which serves as the intake chamber of the pump and to which the refrigerant is supplied through an opening 50 in the boss 51 located on one side of the section 13. The upper surface of the section 13 is machined off to a smooth finish and has arranged thereon the three horizontal cylinders 52, 53 and 54. While I have shown three cylinders in my preferred form of the invention yet one or more may be used and when more than one are used they are symmetrically placed on the section 13 and each is provided on its lower side with a trunnion 55 which engages a suitable bearing 56. The section 13 has a central openin 57 in align ment with the boss 20, and slightly larger than the head 26 of the crank shaft for the purpose of permitting lubricant to flow rom one side of .the section 13 to the other.

1 A crank pin 58, eccentrieally arranged on the head 26, projects upwardly therefrom and has screw-threaded connection therewith, as indicated at 59, the threads of which are preferably so arranged that there is a tendenc for the pin to be tightened as the crank s aft rotates. Each of the cylinders 52, 53 and 54 has a plunger 60 therein and these are provided with suitable packing rings 61 and have their inner ends internally threaded, as indicated at 62. Heads 63, which are connected with the crank pin 58, are screwed into the inner ends of the plungers 60 and secured by means of suitable dowels 64. As will be noted from Fig. 1, the head 63 on one of the plungers 60 has two arms 65 which engage the crank pin 58, and the head 63 on another of the plungers has two arms 66 located between the arms 65 and engaging with the crank pin 58. The other of the heads 63 has a singlearm 67 located between the arms 66. The cylinders 52, 53 and 54 each have an inlet port 68 and a discharge port 69, these ports being located in the vertical plane through the axis of the cylinders. The upper wall of the casing section 13 has elongated ports 70 (see Fig. 2), with which the ports 68 cooperate during the suction stroke of the plungers so that the gases will be drawn from the chamber 49 into the cylinders. This arrangement of ports follows the well-known practice in oscillating engines and pumps and will be understood by those skilled in the art without further explanation.

The upper sides of the cylinders 52, 53 and 54 have fiat, smoothly finished surfaces on which a floating plate 71 rests. This plate has a trunnion connection with each of the cylinders, as indicated at 72 in Fig. 1, and these trunnion connections hold the plate in the position shown in the drawings. The plate 71 has ports 73 with which the ports 69 of the cylinders cooperate during the discharge stroke of the plungers. The upper surfaces of the cylinders are recessed around the trunnions 72, as indicated at 74 in Fig. 1, for the purpose of facilitating accurate manufacture and in order to insure a more uniform wear of the parts due to the oscillation of the cylinders. However, I have found it advisable to leave the small triangular bearing surfaces at the inner corners of the cylinders, as indicated at 75 in Fig. 2, and these triangular bearing surfaces are provided on the upper and lower surfaces of the cylinders.

The center of the plate 71 has a boss 76 on the upper side in which there is seated a spring 77, the upper end of this spring carrying the block 78 on which bears the means of a cap 80 having a screw-threaded connection with the boss 81. Since, in the operation of the pump, the compressed gases are contained in the upper part of the casing section 14 and have a tendency to leak out along the screw 79, I provide a gasket 82 between the lower end of the ca 80 and the shoulder 83 for the purpose of preventing leakage at this point. In order to stiffen the plate 79 it is provided with a circumferential flange 83 and radial ribs 84. A boss 85 is arranged on the up )er part of the casing section 14 and is preferably provided with an internally threaded opening 86 which serves as an outlet for the compressed gases.

The interior of the casing formed by the sections 12, 13 and 14 is filled with a suitable lubricating oil to approximately the level indicated by the line 87 so that the cylinders 52, 53 and 54 with their plungers. the crank pin 58 and the trunnions 55 and 72 are all submerged in the lubricant. The

upper surface of the late 71 is also sub-- merged so that all the ports through -which' the gases are led into and out of the dinarily fills these ports.

In the operation of the pump the shaft rotates the crankshaft 25 andthe crank pin 58 causes the plungers to reciprocate as well as oscillate, and the plungers, in turn, cause the cylinders to oscillate with them. The action-of the plungers and the movement of the cylinders opens and closes the various ports so that the gases are drawn from the chamber 49 and discharged into the space in the casing section 14 whence it passes out through the opening 86 with which a suitable pipe will be connected. In

case sulfur dioxide is used as the refrigerant and any of this gas liquefies after being discharged from the cylinders it will settle through the lubricant into the space 21 "in the casing section 12, and the boss20 will prevent any of the liquid sulfur dioxide from leaking .out along the shaft 25 unless there should be such an accumulation of the li uid sulfur dioxide as to bring the level t ereof up to the lower surface of the head 26 but ordinarily there would be no possibility of such a large accumulation.

The housing of all of the moving parts, of

i the pump within the casing, as above described, avoids the possibility of the escape of the refrigerant to the external atmosphere which would be objectionable in many instances, if 'it occurred.

The chamber in the base 10 may be filled with lubricant to a point above the worm gear31 so that the latter will be thoroughly lubricated.

\Vhile I have illustrated and described what I now consider to be the preferred formof my invention, it will be understood that changes in the details of construction may be made without departing from the spirit of the invention which is defined in the appended claims.

Having thus described my invention, what I claim is: v i

1. In apparatus of theclass'described, the combination of a casing,a -vertically arranged crankshaft therein, a horizontally arranged oscillating cylinder in said casing, a plunger in said cylinder operatively connected with said shaft to be actuated thereby, said casing being adapted to holda lubricant in which said cylinder and plunger are submerged, a member cooperating with the upper side of said cylinder and having a port through which gases are discharged into said lubricant, and said casing having an outlet for gases above the surface of the lubricant. 1

2. In apparatus of the class described, the

combination of a casing, a vertically arranged crankshaft therein, a horizontally arran ed wall in said casing, an oscillating cylinder having a trunnion connection with said wall, said wall and said cylinder having cooperating surfaces and ports for controlling the flow of gases to said cylinder, said casing being ad a ted to hold a lubricant in which said cylin er is submerged, a plunger in said 0 linder operatively connected with said she t to be actuated thereby, a member cooperating with the upper side of said cylinder and having a port through which gases are discharged into said lubricant, and said casing having an outlet for gases above the surface of the lubricant.

3. In apparatus of the class described, the combination of a casing, a vertically arranged crankshaft therein, a horizontally arranged wall in said casing, a plurality of oscillating cylinders each having a trunnion connection with said wall, said wall and said-cylinders having cooperating surfaces and ports for controlling the flow of gases into said cylinders, said casing being adapted to hold a lubricant in which said cylinders are submerged, a plunger in each of said cylinders operatively connected with said shaft to be actuated thereby, a member bearing on the upper sides of said cylinders and having ports through which gases are discharged into said lubricant, and said casing having an outlet for gases above the surface of the lubricant.

- 4. In apparatus of the class described, the combination of a casing, a vertically arranged crankshaft therein, a horizontally arranged wall in said casing, a plurality of oscillating cylinders each having a trunnion connection with said wall, said wall and said cylinders having cooperating surfaces and ports for controlling the flow of gases, a plunger in each of said cylinders operatively connected with said shaft to be actuated thereby, and -a member bear-1n upon the upper sides of said cylinders an having trunnion connection therewith, said member and said cylinders having cooperating ports for controlling the flow of gases. 5. In apparatus of the class described, the combinatlon of a casing, said casing having a horizontally arranged wall, a vertically ar-- ranged crankshaft projecting upwardly through said wall and having a crank thereabove, means below said wall for rotating said shaft, a plurality of oscillating cylinders each having a trunnion connection with said wall,'said wall and said cylinders having cooperating surfaces and ports for controlling the flow of gases, a plunger'in each of said cylinders operatively connected with said shaft to be actuated thereby, a member bearing upon the upper s e of said.

cylinders and having trunnion connection therewith, said member and said cylinders having cooperating ports for controlling the flow of gases, and pressure means for holding said member against'said cylinders and said cylinders against said wall.

6. In apparatus of the class described, the combination of a casing provided with a horizontally arranged chambered wall, a vertically arranged crankshaft projecting upwardly through said wall and having a crank thereabove, means below said wall for rotating said shaft, a lurality of oscillating cylinders each hav1n a trunnion connection with said wall? said wall and said cylinders having cooperating surfaces and ports for controlling the flow of gases between theichamloer in said wall and the cylinders, a plunger in each of said cylinders operatively connected with said shaft to be actuated thereby, a floating plate resting upon said cylinders and having trunnion connection therewith, said plate and said cylinders having cooperating ports for controlling the flow of gases, and adjustable pressure means on the upper side of said plate for pressing the plate against said cylinders and the cylinders against said wa l.

7. In apparatus of the class described, the combination of a casing provided with a horizontally arranged chambered partition therein spaced above the bottom wall of the casing, said bottom wall being provided with an upwardly projecting boss having a stufling-box therein, a crankshaft extending I through said stutlingbox and said partition and having a crank located above the partition, means below said bottom wall for rotating said shaft, a plurality of oscillating cylinders resting on said partition and having trunnion connection therewith, a floating plate resting on said cylinders and connected therewith by trunnions, means for pressing said plate against said cylinders,

said casing being adapted to contain a lubricant above and below said partition and in which saidcylinders are submerged so as to seal the engaging surfaces of said plate, said cylinders and said plate, a plunger in each cylinder operatively connected with said crank, said plate having ports through which gases are discharged'into said lubricant, and said casing having an outlet for gases above the surface of the lubricant.

8. In apparatus of the class described, the combination of a casing comprising a plurality of superposed sections bolted together to provide a pressure-tight chamber, the lower of said sections having an internal upwardly projecting boss having a stuflingbox therein, a section supported on said lower section and having a chamber therein and an opening extending to the exterior and through which there is communication with said chamber, the last-mentioned section also having an opening therethrough in substantial alignment with said boss, an upper section shaped to form a chamber above the last-mentioned section and having an opening to the exterior in the upper part thereof, a vertical crankshaft extending through said stuffing-box and the secondmentioned section and having'a crank located above the latter, a plurality of horizontally arranged cylinders locatedin the said chamber above the second-mentioned section, plungers in said cylinders operatively connected with said crank, and valve means associated with said cylinders for causing a fluid to flow from the chamber in the second-mentioned section through said cylinders and be discharged into the chamber above the second-mentioned section.

In testimony whereof I aflix my signature.

LEE B. GREEN.

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