US1658204A

US1658204A - Pump

Info

Publication number: US1658204A
Application number: US78724A
Authority: US
Inventors: Conrad B Krause
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-01-01
Filing date: 1926-01-01
Publication date: 1928-02-07
Anticipated expiration: 1945-02-07

Description

Feb. 7, 1928. 1,658,204

c. B. KRAus;

PUMP Filed Jan. 1, 1926 3 Sheets-Shee 1 Q5110 eiafofi am/MA,

Feb. 7, 1928. 1,658,204

C. B. KRAUSE PUMP Filed Jan.1. 1926 3 Sheets-Sheet 3 Patented Feb. 7', 1928 UNITED. STATES PATENT OFFICE.

CONRAD B. KRAUSE, OF CLEVELAND, OHIO.

PUMP.

This invention relates to pumps and more particularly to pumps especiallyadapted for use as compressors in connection with refrigerating apparatus.

It is one of the objects of the invention to provide a pump, of relatively small ca-.

pacity, that will be efiicient in operation and so designed as to have a minimum of wearing surfaces and these points. of wear so arranged that the wear. will not materially affect the operation of the pump for relatively long periods of time. The invention has particular reference to domestic refrigeration apparatusand it, is a further object to provide a construction that will be .practi-.

cally noiseless, in operation and avoid the pulsations in the compressed fluid, which is one of the objectionable features of present types of pumps of small capacity.

A further object ofthe invention is to provide a double-acting pump that will require very little, if any, more space than a singleacting pump of the same capacity.

A further object of the invention is to provide a pump of such simple design and construction that it may be manufactured on a commercial scale at a comparatively low cost.

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

Fig. 1 is a side elevation of a pump embodyingmy invention;

Fig. 2 is a horizontal section on the line Fig.- 3 is a section on the line 33 of.

one of. the housing sections having a sub stantially'fiat end against which there is secured the hollow housing section 11,v these sections having

peripheral flanges

12 and 13, respectively, which are secured together by screws or bolts lt. The flanges 12 and" 13 are, accurately machined so as to fit together,

asshown. at 15. A cylinder 16 is arranged within the section 11, of the housing, and has bearing

surfaces

17 and 18, at its ends, to fit against accuratelymachined surfaces at the end of the housing section 10, which are in the same plane as the surfaces 15, so that all of thesesurfaces, on the end of the section 10, may be machined off by a single operation. The cylinder 16 has oppositely projecting trunnions 19 an 20, the trunnion. 19 being mounted in a bearing sleeve 21,, in the housing section 10, and the trunnion 20 being mounted in a bearing sleeve 22, in the housing section 11. The boss 23,. carrying the sleeve 22, has its outer end closed by a plug 24-. The cylinder 16 hasa removable head 25-that is secured thereto by thescrews 26, and, the surfaces 17 andv 18 are equally spaced onopposite sides of the trunnion 19.. A crank shaft 27, arranged: parallel with the trunnions 19 and 20, is mounted in a the shaft 27. An out-board bearing 3a is carried by the

studs

31 and 32 and secured thereon. by a pin 35, the arrangement permitting the bearing 34: to be readily removed, for the purpose of permittitng removal of they nut 30, and then replaced in accurate alignment with the bearing sleeve 28.. The bearing 34 supports the shaft 27 and is provided with a depending oil well. 36 from which the bearing 34' is lubricated by means of the wick 37' A. pulley 38 is secured on the outer end of the shaft27 with its hub abutting the end of the bearing 34 and'coopcrates with the head 27, at the oppositeend of the shaft to hold the shaft against endwise movement. The bearing 34 has an oilcatching fiange' 39, and a. passage 40 for draining the intercepted oil back into the oil well 36..

A double-acting piston arranged in the cylinder 16 and comprises the middle section 41 onto which the end sections 42 and 43 are threaded. The sections 42 and 453 are each provided. with a packing ring 44 and the middle sect-ion. 41 carries a wrist pin '45 which. projects through elongated slots 46', infthe walls of the cylinders 16', and is connected with. the opposite arms of'a'yoke- 4.7, the wrist pin 45 constituting,'in effect, a pair of trunnions projecting from opposite sides of the piston. The yoke 47 isopera= ftively connected'with the crank pin 48,, on p operates closed by the plug 67.

the shaft 27, a screw 19 being carried by the crank for the purpose of holding the yoke against displacement.

The trunnion 19 has an extension 50 which carries a thrust bearing 51' between'which and the bearing sleeve 21 there is a spring 52 for the purpose of firmly and uniformly holding the

surfaces

17 and 18 of the cylinder in sealing engagement with the abutting surfaces on the end of the section 10. The outer end of-the cavity containing the thrust bearing 51 and spring is closed by the plug 53 so as to prevent leakage.

The cylinder 16 has ports 54L and 55 adjacent its ends so that the piston may travel practically to the ends of the cylinder with out covering the ports, thereby permitting a practically complete discharge of the contents upon each stroke. The port 5 1 cowith-an intake port 56 and with a the housing section 10 the port 55 cooperates discharge port 57 in In a similar manner,

with an intake port 58 and with a discharge port 59. The

discharge ports

57 and 59 are preferably made larger than the other ports mentioned, so as of the cylinder contents, on each stroke. The intake port 56 is in communication with a vertically extending port 60 which is drilled in the housing section 10 and has its outer end closed by a plug 61. in a similar manner, the intake port 58 communicates with a vertically extending port 62, which is drilled in the housing section 10 and has its outer end closed by a plug 63. The

ports

60 and 62 communicate with a horizontally extending port 6a, which is drilled in the housing section 10 from one end and has its outer end closed by the plug 65. The discharge port 57 communicates with a vertically extending port the housing section 10 and has its outer end the discharge port 59 communicates with a vertically extending port. 68 that is drilled in the housing section 10 and has its outer end closed by the plug 69. The ports'66 and 68 communicate with the horizontally extending port 70 that is drilled in the housing section 10 and has a. threaded recess 71, at its outer end, to receive a pipe connection for conducting the compressed fluid to the point of use. The housing section 11 has a boss 72 that is provided with a threaded recess 73 to receive a connection for the intake pipe of the pump. A. port 74 communicates with the recess 7 3 and registers with a port 7 5 in the housing section 10, which communicates with the horizontal port 64. The port 75 has arranged in it a bushing 7 6 which has a seat 77 for one side.

of the valve 78, the opposite side of this valve being adapted to cooperate with a seat 79 in, the bushing 80. The valve 78 is mounted on a stem 81 which projects ,wrench.

ciated.

to allow a. full discharge the seat 77, the pump will draw in a supply 66 that is drilled in In a similar manner,

Having thus nesaaoa through a stuffing-box 82 and has its outer end squared, as shown at .83, to receive a The stem 81 is threaded in the housing, as indicated at ea, so as to be moved endwise when it is turned.

The bushing has an interior bore that is slightly larger than the valve stem 81 to permit fluid to flow from a charging port 85 to the inlet port ea. The charging port 85 is normally closed by the plug .86. The housingv section 10 has abase 87 adapted to be secured to a suitable support.

The symmetrical arrangement'of the

surfaces

17 and 18, at equal distances on opposite sides of the trunnion 19, insures against any unbalanced forces tending to tilt the as to permit leakage at either.

cylinder so of these surfaces. The arrangement of the trunnions 19 and 20, on opposite sides of the cylinder, also tends to hold the cylinder -in proper alignment.

r The provision of the double-acting valve 7 8 affords a convenient means for charging the system, with which the pump is assoll hen the valve is closed against (in account'of using a double-acting cylinder and piston and the symmetrical arrangement of the surfaces 17 and l8, about the cylinder trunnions, it has been possible to provide a pump having practically double loo the capaclty' of the ordinary single-acting pump, but requiring little, if any, more space than would be required for a singleacting pump. In addition to this, my improved pump has the advantage, overj'a single-act ng pump,

of lessening the -'variations of pressure in the system by doubling the number of suction and discharge strokes in a given time.

described my invent-ion, I claim: 7

1. In pumps, the combination of a housing, acylinder osclllatably mounted in said housing, a doube-acting piston in said cylin ,7 der having a wrist pin projecting through the side Walls of the cylinder, a crank shaft,

and a yoke operatively' connected with-said wrist pin and'with said crank shaftfor reciprocating the piston.

2. In pumps, the combination of a' hous ing, a cylinder oscillatably mounted; in'said der having a wrist pin projecting through housing, adouble-acting piston in said cylin- V the side walls of the] cylinder, a crankshaft, said cylinder and said housing havingco operating bearing surfaces and inlet and cischarge ports therein, spring means for. holding said surfaces in contact, and a-yoke operatively connected with said wrist pin and said crank shaft for reciprocating the piston.

3. In pumps, the combination of a housing, a cylinder having a trunnion mounting in said housing on which it oscillates, a double-acting piston in said cylinder having a wrist pin projecting through the side walls of the cylinder, a crank shaft, said cylinder and said housing having cooperating bearing surfaces on opposite sides of said trunnion mounting and inlet and discharge ports therein, spring means for holding said surfaces in contact, and a yoke operatively connected with said wrist pin and said crank shaft for reciprocating saidpiston.

4. In pumps, the combination of a housing, an oscillating cylinder in said housing, a piston in said cylinder, a crank shaft operatively connected with said piston, a hearing in said housing for said shaft, a stuffing-box surrounding said shaft exteriorly of said bearing, a supporting stud in said housing arranged parallel with said shaft, and a bearing for said shaft carried by said stud.

5. In pumps, the combination of a housing, an oscillating cylinder in said housing, a piston in said cylinder, a crank shaft operatively connected with said piston, a bearing in saidhousing for said shaft, a stuffingboX surrounding said shaft eXteriorly of said bearing, a plurality of supporting studs projecting from said housing parallel with said shaft, and a bearing for said shaft carried by said studs.

6. In pumps, the combination of a housing comprising two sections one of which has a substantially flat end with a plurality of finished surfaces thereon all in the same plane and the other of which is hollow and provided with marginal surfaces fitting against surfaces on said end, means for securing said sections together, an oscillating cylinder arranged within the second-mentioned section and having trunnions positioned in aligned bearings in said sections, said cylinder and said end having cooperating bearing surfaces arranged oil-opposite sides of said trunnions and provided with ports for controlling the flow of fluid to and from the opposite ends of said cylinder, a spring cooperating with one of said trunnions for holding the last-mentioned surfaces in sealing engagement, a double-acting piston in said cylinder, a crank shaft carried by said housing, a yoke operatively connected with said crank shaft, and a pin arranged at right angles to the axis of said trunnions and operatively connecting said yokewith said piston, said cylinder having slots in its side walls in which said pin reciprocates.

7. In pumps, the combination of a h0using, an'oscillating cylinder having a trunnion mounting in said housing, said cylinder and housing having cooperating bearing surfaces equally spaced and symmetrically p0- sit-Zoned on opposite sides of the axis of said trunnion mounting with cooperating inlet and discharge ports in said surfaces, and spring means associated with said trunnion mounting for pressing said surfaces into sealing engagement.

In testimony whereof, I hereunto aflix my signature.

CONRAD B. KRAUSE.