US1678909A - Pumping apparatus for handling gases and liquids - Google Patents

Description

July 31, 1928. 1,678,909

I. 0. JENNINGS PUMPING APPARATUS FOR HANDLING GASES AND LIQUIDS Filed Sept. 6, 1927 5 Sheets-Sheet 1 (ecvr 7520a I 1N V/[NTOR I July 31, 1928. 1,678,909

I. C. JENNINGS PUMPING APPARATUS FOR HANDLING GASES AND LIQUIDS Filed Sept. 6, 1927 3' Sheets-Sheet 2 11v VENTUR C Jew/21x2 July 31, 1928. 1,678,909

I. C. JENNINGS PUMPING APPARATUS FOR HANDLING-GASES AND- LIQUIDS Filed Sept. 1927 s Sheefi's-Sheet 3 INVENTOR Patented July 31, 1928.

UNITED STATES IRVING C. JINGS, OF SOUTH NORWALK, CONNECTICUT.

PUMPING A'IPT'ARLATUS FOR HANDLING GASES ANDLIQUIDS.

The object of this invention is to provide a very simple pumping apparatus for handling both'gases and liquids. The apparatus has been especially designed for use in vacuum steam heat-ing systems, for use in paper mill work, and for use in pump work such as removing drainage or sewage.

The invention comprises a simple mod1ficatlon of the well known Nash air or gas pump, which is covered by patents grantedto Lewis H. Nash, No. 953,222, dated March 29, 1910 and N 0. 1,091,529, dated March 31, 1914, and which in improved form isshown in patent granted to me No. 1,297,692, dated March 18, 1919.

The invention is illustrated in the accompanying three sheets of drawings in which Figure 1 is a diagram illustrating the piping connections, Figure 2 is a plan of the pump and the motor employed for driving the same,

Figure 3 is a cross-sectional elevation on an enlarged scale on the line'"3'3 'ofFig'ure 2, illustrating the ports and connections employed for pumping the liquid,

Figure 4 is a cross-sectional view on the a vacuum steam heating, the returns, which line 4-4 of Figure 2, illustrating the gas inlet and outlet ports of thepump, and

Figure 5 is a view similar to Figure 1,

illustrating a modified form of piping.

The Nash pump before referred to comprises a rotorkhaving displacement chambers on its periphery arranged in a casing shaped eccentrically-relatively to the rotor. This casing is rovided with ports. The pump is partly lled with a liquid, as water. As the rotor is driven at high speed, this liquid will assume a ring shape around in-- side of the casing and will recede from the chambers by centrifugal action and will be forced into the chambers by its velocity and the crowding-in action against the casing, so that in effect the liquid will form water pistons reciprocating into and out of the displacement chambers. A pump of this character is particularly adapted to handle a gas, and although it will handle a liquid, it does not do so efficiently. The object of this invention is to re-arrange this pump so that it will handle both gases and liquids efllciently.

To do this, I provide an outlet or port or outlets or ports in the casing at the point or points where the liquid is being crowded inwardly into the displacement chambers,

and connect the same preferably to an hy- Application filed September a, 1927. Serial No. 217,669.

drostatic head, so that when any excess 9 liquid passes to the pump, it will be pumped out against this hydrostatic head. By this arrangement, the pum can be used to main taln'a vacuum by ex austing air and gas, and also to pump efiiciently any liquid drawn along with the air or gas; or, in other words, one rotor can be adapted for efficient use in any location Where both gases and liquids have to be handled.

Referring to the drawings and in detail, A

designates the pump casing, in whichjs arranged the rotor B provided with the usual displacement chambers. The casing is arranged with two eccentric sections, so that two pumplng actions will be obtained in each displacement chamber for each rotation of the rotor. Suitable gas inlet ports C, C and gas outlet ports.D D areprovided in the side of the casing to cooperate with the side of the rotor B, as shown in Figures 3 and 4. The construction thus far described is a well known form of Nash pump. When this pump is filled with a liquid, the same will act to pump gas.

If my improved pump is to be used in are to be handled, are lead to the pump through an inlet pipe E, which connects to the inlet ports G C; and the air or gas, which is to be exhausted, is. forced out through an outlet pipe F which is connected to the outlet ports D D.

Outlets or ports G G are formed in the pump casing at the points where the operating liquid tends to exert its 'maximum compression efiect, or Where it is forced most completely into the displacement chambers.

Pipes H vH are connected to these outlets orports, and these pipes preferably connect to a single pipe I, Which is carried upwardly for a considerable height and then connected to a header J. The pipe I is carried up high enough so as to give any desired hydrostatic head back into'the pump casing. The water or liquid handled by the pump and delivered over into the header J can be taken therefrom through a pipe K. If the apparatus is used in vacuum'steam heating, this pipe K can be connected to the boiler through 'a suitable check valve, the hydrostatic head serving to force the water into the boiler against the pressure, therein.

In operation, when air or gas only is being handled, the pump will'act as an ordinary Nash pump and will exhaust the air orgas by the piston action of the water in the displacement chambers of the rotor and .air or gas, will cause the water to raise'or back up in the pipe I and flow over into the header J. This surplus water thus will be easily and smoothly handled as it does not have to be. forced into the displacement chambers of the rotor and out through the outlet ports D D; which occasions banging or water hammer. WVhen the rotor is handling water, it wilLbe seen that the sameacts substantially like a centrifugal water pump, theinlet ports C 0 representing the inlets or eye, connecting to the impeller, and

thewatcr being thrown outwardly in the impeller and clearing therefrombeyond the periphery thereof into the outlets G G.

The pump will act to maintain a substantially constant vacuum or suction, as the pressure of the water pistons entering into the displacement chambers of the rotor is substantially determined by hydrostatic head in the pipe I.

Thus, both gas and liquid-can be handled efficiently by one rotor and if desired, the apparatus can be designed to work without the separating tank usually employed. in systems of the character referred to.

' In the same manner the pump can be used in paper mill work.

In some instances only one water outlet or port can be used in the pump casing. This arrangement is illustrated. in Figure 5 of the drawings.'- This arrangement can be 1 used where the volume of liquid is small relativelyto the volume of air or gas which is to be handled or where the pump casing has only one eccentric section.

The apparatus, can. be used as a sump pump, in'which thepumping apparatus placed, above the sump. When put in this location and started in operation,-the pump will first act to exhaust air from the pipe leading up from the sump. This will lift the water u'pto thepump which will thereafter act as a centrifugal pump, lifting and pumping the water from the-sump. In effeet, then the pum will act'as a self-starting, lifting, and orcing centrifugal water P P- The details and arrangements herein shown and described may be greatly varied by askilled mechanic without departing from the scope of my invention as expressed in the claims.

Having thus fully described my inven- 4 tion, what I claim and desire to secure by Letters Patent is 1. In a pump, employing liquid as the pumping medium a rotor having displace ment chambers, a casing arranged eccentrically to the rotor, .a gas inlet and outlet, and a liquid outlet or port arranged at a point in the casing where the operating liquid tendsto exert a compression effect.

2. In a pump, employing liquid as the pumping medium, a rotor having displacement chambers, a casing arranged eccentrically to the rotor, a gas inlet and outlet, and a liquid outlet or port arranged at a point inthe casing where the operating liquid tends to exert its maximum compression effect.

3. In a pump employing a liquid as the pumping medium, a rotor having displacement chambers, a casing having a plurality of section arranged e'ccentrically to the rotor, gas inlet and outlet ports, and liquid outlets or ports arranged at points in the casing where the operating liquid tends to exert a compression effect.

4. In a pump employing a liquid as the pumping medium, a ro or having displacement chambers,- a casing arranged eccentrically to the rotor,a gas inlet and outlet, 2.

liquid outlet or port arranged at a point in the casing where the operating liquid tends to exert a compression effect, and an outlet pipe connected to the liquid outlet or port and carried up for a considerable height so as to give a hydrostatic head back into the pump casing, whereby the pump is arranged to handle both gases and liquids.

5. In 'a pump employing a liquid, as the pumping .medium, a rotor having displacement chambers, a casing having two sections arranged eccentrically to the rotor, gas inlet head back into the pump casing whereby the I pump is arranged to handle both gases and liquids. u

6. In a pump employing a liquid as a pumping medium, a rotor having displacement chambers, a casing arranged eccentrically to, the rotor, a gas inlet and outlet, a

liquid outlet or port'arranged at a point in the casing where the operating liquid tends to exert a compression effect, an outlet pipe connected to the l'iquid outlet or port and carried up to a considerable height so.

as to providea hydrostatic head back into the casing, and a header into which the outlet pipe connects.

In testimony whereof I have hereunto af fixed my signature.

IRVING C. JENNINGS.

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