US1439628A - Pump - Google Patents

Description

E. T. KIEN.

Dec. 19, 1922.

PUMP.

FILED JUNE 7, 1921.

2 SHEETSSHEE] 1.

FROM can.

Dec. 19, 1922. 1,439,628. E. T. KIEN.

PUMP.

FILED JUNE 7, 1921. 2 SHEETSSHEET g.

31-14mm for Edward Kien Patented ec. 19, 1 922.

STATES PATIENT OFFICE.

EDWARD THOMAS KIEN, 0F ELMHUBST, ILLINOIS, ASSIGNOR or ONE-HALF TO EMMETT s. NEWTON AND w. M. HARDWICK, 130m 0F CHATTANOOGA,

TENNESSEE.

PUMP.

Application filed June 7, 1921. Serial No. 475,668.

citizen of the United States, residing at Elmhurst, in the county of Du Page and State of Illinois, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My said invention relates to a pump for oil and gas, of the general type described in my Patent No. 1,355,231, filed October 12, 1920, and my Patent No. 1,409,868, March 14, 1922.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, 7

Figure 1 is an elevation of a refrigerator mechanism in which the pump may be used,

Figure 2, an elevationpart ly in section of the pump and associated devices, and

Figure 3 is a collective viewof the pump casing and associated parts.

In the drawings 10 indicates a motor for driving through a shaft 11 the pump shown in Figure 1 which is enclosed in a casing .12 having an upper hollow portion 13 forming a separating chamber for oil and gas and also acting as a storage chamber for compressed gas. The gas forced into this chain ber by the pump passes through a pipe 14 18 back to the pump to be again condensed.

The casing 12 has a cylindrical chamber 19 with end plates or heads 20 and the shaft 11 passes through said end plates and the chamber. A pump casing 21 is mounted approximately midway between the end plates 20 and has at each side a disk22, beyond each of whiclris a second disk 23 'all of which parts are shown in Figure 3. Ball bearings 24 mounted in plates 23 provide anti-friction supports for the shaft 11 and the shaft 26 of the co-acting rptor of the pump. Bolts pass through aligned openings in the parts 21, 22 and 23 (see Fig. 3) and in one or both heads 20 and secure these parts together and in proper relation to said heads.

One of the heads ,20 is provided with a passage 28 by which the gas from the pipe 18 passes through openings 29 and 30 to a cut away portion 31 of casing 21. At the other end of the rotors and on the opposite sideof a plane passing through their axes is a passage 32 through which the compressed gas passes to a similar channel in a disk 33 which has an extension 34 engaging the ad- Jacent head 20 and spacing the disk therefrom thus providing room for an upwardly extending part of the channel 32. A pipe 42 extends upwardly from the disk and carries at its upper end a baflie-43 which as-' sists in separating the oil from the gas. The oil falls back into the cylindrical chamber surrounding the pump casing and this chamber is normally filled nearly to the top. The oil in the chamberis kept'cool'by tubes 27 extending longitudinally therethrough in 5 an annular series spaced about the casing 21 shown in Figure 1 which act by suction opposite the cut-away portion 31 of the casing to draw gas between them. As the gears revolve the gas is gradually compressed and forced out through the channel 32. The casing 21 and disks 22, 23 and 33 are held in proper relation to each other and to the end plates of the chamber by pins indicated at 37. To provide for feeding oil to the gears to seal the openings between the teeth I have indicated a vertical groove 38 in the left-hand disk 23, this groove leading to ports 39 in disk 22. Ports 39 open into a pair of horizontal passages 40 through the casing -21 and these passages are further subdivided, each into four branches 41 extending toward the gears whereby the oil may be admitted at different points tothat portion of each gear having a compression action on the gas.

' The first oil admission opening at the right in Figure 3 admits oil to the space between the respective gear teeth just prior to initial compression, oil being forced in due to the pressure in chamber 13 which greatly exceeds that on the suction" side of the gears. Compression then begins and as the teeth "pass the successive ducts 4:1 addi-- tional oil is admitted the pressure in the chamber being still above that between the gear teeth. The oil so admitted is taken from the top of the chamber where it is hottest and least likely to contain an admixture of liquefied gas such as would inter fere with proper working of the pump. It will be understood that the oil forms a foam between the rapidly rotating gears and so lubricates them and also acts as a liquid seal to prevent escape ofgas between them. The compressed gaS ejected at 34 sometimes falls to the bottom of the chamber with the cold oil in a liquid form and if admitted hetween the gears would thin the oil and tend to break the liquid seal. Admission of'the oil is successive small increments \helps to form the foam by breaking up the stream of oil.

Normally the entire body of oil will be hot enough to cause the gas to separate therefrom immediately, but still be cooled enough by the ventilating pipes to prevent overheating of the pump and of the oil itself. The gas is more and more compressed as each tooth passes along the groove between two others and is finally forced with the oil out through passages 2 and 33. The oil falls back into chamber 9 and thus a continuous circulation takes place, clean oil being taken from the top of the body of oil and impurities fallin to the bottom of the chamber 19 from w ich they may be removed at proper times in any convenient manner.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. A pump-comprising a' pair of. rotors having inter-engaging spiral teeth, a casing surrounding said rotors having an inlet passage forgas adjacent one end of said teeth and means providing an outlet passage adjacent the opposite end of said rotors and at the opposite side from the inlet,

a pair of discs adjacent the casing, said inlet and outlet passages extending through the said discs, substantially as set forth.

2. A gas compressor comprising a .housmg open at opposite sides, end-closures therefor, a shaft extending through said end-closures, compressing ,means driven thereby, a casing enclosing the compressing means and forming with thehousing a chamber .containing oil said casing having passages for oil from the chamber to the compressing means, detachable end-closures on said casing, an inlet passage leading to said compresslng means, an outlet through one of the end closures of the housing said end-closure being spaced from the end of the housing, a pipe extending upward in said space to the lpper part of the chamber ing, a pair of rotors in the housing having combination of a housing, a cylindrical cas- 'ing within the housing and spaced from the walls thereof,-said parts providing between them a chamber containing oil, a rotary pump within the casing, inlet and outlet passages to said casing for admitting gas to the pump to be compressed,means providing circulation of oil through the pump .in connection with the gas passing therethrough, a fan at one end of the housing and ventilating pipes extending through the chamber in co-acting relation to said fan, substantially as set forth.

4. A gas compressor comprising a housinter-engaging spiral teeth, a casing surrounding said rotors, a pair of disks engaging the ends of said casing and said rotors, a second pair of disks between the disks of said first pair and the housing, and inlet and exit passages'in said disks for permitting circulation of gas to and from the pump, substantially as set forth.

5.-A gas compressor comprising a hous-- ing, a pair of rotors in the housing having inter-engaging spiral teeth, a casing surrounding said rotors, a pair of disks engaging the ends of said casing and said rotors, a second pair of disks between the disks of said first pair and the housing, inlet and exit passages in-said disks for permitting 10C circulation of gas to and from the pump, and inlet passages in said disks and in the casing for admitting oil to the pump to form a liquid seal therefor, substantially as set forth. p

6. A pump for air and gas compressors comprising a cylindrical chamber, heads at opposite ends of the chamber, a pair of .rotors within the chamber having inter-engaging spiral teeth, a casing about said 111 rotors, discs closing the ends of the casing and confining the rotors therein, said discs being secured between the rotors and the heads, an inlet passage through such discs for admitting gas to the rotors, an outlet llfi passage through said discs, means for admitting oil to said rotors, and a pipe connected to said outlet passage extending upward from the rotors and having at itsupper end a baffle to separate the oil from the gas, substantially as set forth. 7. A pump comprising a pair of rotors having inter-engaging spiral teeth, a casing surrounding said rotors having an inlet passage for gas adjacent one end of said leading from the upper end of the chamber In Witness whereof, I have hereunto set and having branches adjacent the rotors, my hand and seal at Atlanta, Georgia this 10;

one branch communicating with the space 27th day of May, A. D., nineteen hundred about the rotors just prior to initial com? and twenty-one'.'

- pression position and the remaining EDWARD THOMAS KIEN; [1 s.] I

branches admitting oil in successive incre- Witnesses: ments during compression, substantially as R. W. STARKE set forth. 1

W. W. STEVENS.

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