US1335478A - Condenser system and vacuum-pump - Google Patents

Description

P. P. BOURNE.

CONDENSER SYSTEM AND VACUUM PUMP.

APPLICATION FILED MAY 23, 1919.

- 1,335,478. 7 Patented Mar. 30,1920.

2 SHEETS-SHEET I.

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CONDENSER SYSTEM AND VACUUM PUMP,

APPLICATION FILED MAY 23, 1919. I r

Patentqd Mar. 30,1920.

2 SHEETSLSHEET 2.

UNITED STATES PATENT OFFICE.

PHILLIPS P. BOURNE, OF WINCHESTER, MASSACHUSETTS, ASSIGNOR TO WORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

' CONDENSER SYSTEM AND VACUUM-PUMP.

Application filed May 23, 1919.

To all whom it may concern Be it known that I, PHILLIPS P. BOURNE, a citizen of the United States, residing at Winchester, county of Middlesex, and'State of Massachusetts, have invented certain new and useful Improvements in Condenser Systems and Vacuum-Pumps, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to vacuum pumping apparatus. of the class employed in connection with steam cOIldeIlSiIlg systems, and especially'to that type of apparatus known as dry and wet air pumps, in which one end of the cylinder receives the air-and uncondensed vapor and the other end the discharge water, that is the water of condensation in surface condensing systems, for

which the invention is especially intended, although applicable also to jet condensing systems.

The especial object of the invention is to provide a condensing system of this class in which the pump shall be simple, reliable. and economically operated. and a system by which a high volumetric efficiency and vacuum may be maintained, with a vacuum pumping apparatus of small size and low cost.

For a full understanding of the invention,

a detailed description of condenser systems.

in preferred forms as applied in connection with surface condensers, will now be given, in connection with the accompanying drawings forming a part of this specification, and the features forming the invention then specifically pointed out in the claims.

In the drawings- .Figure 1 is a side elevation of a surface condenser system, with the pump and cooler in section. showing a preferred construction in which the air and uncondensed vapor are taken off the condenser separately from the water of condensation;

Fig. 2 is a similar partial view showing a construction in which the air and uncondensed vapor are takenofl' the condenser with the water of condensation, and

Fig. 3 is a view similar to Fig. 1, showing the invention applied in connection with a horizontal pump.

Reierrmg to the drawings, and especially to Fig. 1. A is a surface condenser shown as of a well-known type; B the tail pipe for Specification of Letters Patent. Patented Blair. 30, 1920.

Serial No. 299,320.

the water of condensation, and C the air der F receives the water of condensation from tail pipe B through base suction chamber 10, and the usual suction valves 11, and

discharges below the piston through force valves '12, discharge chamber 13 and dis charge pipe 14. The cylinder F also receives above the piston G the air and uncondensed vapor from pipe 0 through inlet chamber 15 and inlet ports 16', this air and vapor inlet preferably being valveless and adapted to be opened by the piston G at the end of its downward stroke for suction and closed by the piston on reversal for discharge on the upward stroke, such discharge being through valves 17 in the cylinder head.

This condensing systemand vacuum pump, so far as above described, is well known, so that no further description of its construction or operation, except so far as concerns features added in accordance with "the present invention, is required.

Referring now to these features, the air and uncondensed vapor from the condenser is not discharged to the atmosphere by the piston on its upward stroke, but is discharged from the ports controlled by valve 17 to a head discharge chamber closed 'to the atmosphere and through a passage 18, shown as cast in the cylinder but which may be formed by a pipe or in any other suit able manner, to ports 19 opening into the cylinder below the piston so as to be opened by the piston'at or near the end of its upward stroke and closed by the piston at or near the beginning of its downward stroke. The air and unco'ndensed vapor, therefore, are not delivered against atmospheric pressure by the piston on its upward stroke, butare delivered only against the reduced suction. pressure in cylinder F below the piston. The discharge chamber above valves 17 and passage 18 are made of such capacity as to 1 avoid large compression before the port 19 is opened. The air and uncondensed vapor thus transferred to the cylinder below the piston are compressed and discharged with the Water of condensation through valves 12 on the downward-stroke of' the piston.

It is desirable that the temperature of the air in the upper end ofthe cylinder should be .kept low, as cooled theair cooler in the condenser, for the purpose of reducing the air volume and aidlng in the condensation of the vapor, and for this purpose the water, preferably injected into the air end for the purpose of filling the clearance spaces and sealing the piston and air dis-.

charge valves, should be cold water of therequired temperature. This cold water is preferably delivered to the cylinder throu 11 ports 16 above the piston at the end of t e downward stroke of the piston and preferably taken from the discharge of pump F, in which case, because of its temperature as water of condensation, it is important to cool it to.the required temperature before it is. delivered above the )iston. In the construction shown, this liquid is taken from the discharge chamber 13 of pump F by pipe 20 and passed through a cooler and then supplied through pipe 21 to air suction chamber 15, the amount of water supplied preferably being regulated by cock22. The cooler may be of any suitable construction, but as shown the water from pipe 20 passes through outer tubes 1 which are cooled by inner tubes 2 supplied with cold circulating water by the pump E through pipe 23 connecting with the circulating pump delivery 0, this water returning to the suction (Z of pump E through pipe 24. As shown, this cooled water of condensation is used also for sealing and cooling the gland of the pump piston rod, water being supplied through pipe 25 controlled by cock 26 to the gland ring 27.

The construction shown in Fig. 2 is the same as that shown in Fig. 1, except that the air and uncondensed vapor pass from the condenser through tail pipe B with the wa-' ter of condensation, and are separated at the suction chamber 10, the water of condensa tion passing. into cylinder F below the piston throughvalves 11, as in Fig. 1, and the air and uncondensed vapor passing upward through passage :28 to suction chamber 15, as common in this class of dry and wet air pumps. v

As shown in Fig. 3, the airand uncondensed vapor are taken off through pipe 0 and the water of condensation through tail pipe B, as in Fig. l, but the pump is made horizontal and is shown as driven by an engine of the rotative type but which may be direct-acting as in the other constructions. In this construction, the air suction chamber 15 and ports 16 are shown as placed on the upper side of the pump, which usually is preferable, and the delivery passage by which the air is transferred to the water side of the piston is shown as on the lower side of the pump, but it may be on the side or 'top to avoid collection of water if this is found preferable in any case. The suction valves 3, and force valves 4, at the water end of the pump, are preferably placed horizontally in valve chamber 29, and the air dis charge valves 5 are placed horizontally in cylinder.

It will be seen that the invention provides a vacuum pumping apparatus by which a high volumetric efliciency is secured and a high ceiving and discharging air and uncondensed vapor at one end of the cylinder and liquid at the other end of the cylinder,.and

valve chambers on the opposite head of the a passage connecting the outlet of the air end of the cylinder withthe water end of the cylinder whereby the air is delivered from the air. end of the cylinder against a reduced pressure in the water end and finally delivered with the water.

2. In a condenser system, the combination with the condenser, of a pump having its cylinder connected to the condenser for receiving and discharging air and uncondensed vapor at one end of the cylinder and liquid at the other end of the cylinder, a passage connecting the outlet of the air end of the cylinder with the water end of the cylinder whereby the air is delivered from the air end of the cylinder against a reduced pressure in the water end and finally delivered with the water, and connections for supplying sealing water to the air end of the cylinder.

3. In a condenser system, the combination with the condenser, of a pump having its cylinder connected to the condenser for receiving and discharging air and uncon densed vapor at one end of the cylinder and liquid at the other end of the cylinder, a passage connecting the outlet of the air end of the cylinder with the water end of the cylinder whereby the air is delivered from the air end of the cylinder against a reduced pressure in the water end and finally delivered with the water, and a by-pass through which water from the water end is delivered to the air end on the air suction stroke of the piston.

ered with the water, a by-pass through 4. In a condenser systennthe combination with the condenser, of a pump having ts cylinder connected to the condenser for receivlng and discharging air and unconthe air end of the cylinder againsta reduced pressure in the water end and finally delivwhich water from the water end is delivered to the air' end on the air suction stroke of the piston, and a cooler on said by-pass.

5. In a condenser system the combination with the condense yof a pump having ts cylinder connected to the condenser for receiving and discharging air and uncondensed vapor at one end of thecylinder and liquid at the other end of the cylinder,'a

passage connecting the outlet of the air end of the cylinder with the water end of the cylinder whereby the air is delivered from.

the air endof the cylinder against a reduced pressure in the water end and finally delivered with the water, a by-pass through which water from the water end is delivered to the air end on the air suction stroke of the piston, a surface cooler on said icy-pass,-

and connections for supplying cooling water to said cooler from the condenser cold water having its cylinder port controlled by the piston and opened at or near the end of its upward stroke.

7. In a condenser system of that class in which the air and uncondensed vapor are withdrawn from the condenser separately from the discharge water, the combination with the condenser, of a vertical pump cylinder, an air passage connecting the upper end of the cylinder with the condenser and having a valveless piston-controlled inlet, a water passage connecting the lower end of the cylinder with the condenser and having a valved inlet, a valved air outlet at the top of the cylinder, a valved water outlet at the bottom of the cylinder, and a passage connecting the air outlet with the waterend of the cylinder and having its cylinder port controlled by the piston and opened by the latter at or near the end of its upward stroke.

8. In a condenser system of that class in which the air and uncondensed vapor are withdrawn from the condenser separately from the discharge water, the combination with the condenser, of a vertical pump cylinder, an air passage connecting the upper end of the cylinder with the condenser and having a valveless piston-controlled inlet,-a

water passage connecting the lower end of the cylinder with the condenser and having a valved inlet, a valved air outlet at the top of the cylinder, a valved water outlet atthe bottom of the cylinder, a passage connecting the air outlet with the water end of the cylinder and having'its cylinder port con trolled bythe piston and. opened by the latter at or near the end of its upward stroke, v

and a by-pass from the liquid discharge of i the cylinder to the air inlet. I '9. In a condenser system of'that class in which the air and uncondensed vapor are withdrawn from the condenser separately from the discharge water, the combination with the condenser and itsair cooler, of a vertical pump cylinder, an air passage connecting the upper end of the cylinder withthe air. cooler and having a valveless pistoncontrolled inlet, a water passage connecting the lower end of the cylinder with the condenser and having a valved inlet, a valved air outlet at the top of the cylinder, a valved water outlet at the bottom of the cylinder, a passage connecting the air outlet with the water end ofthe cylinder and having its cylinder port controlled by the piston and opened by the latter at or near the end of its upward stroke, a bypass from the liquid discharge ofthe cylinder to the air inlet, and a cooler on said by-pass.

10. A vacuum pumphaving its cylinder provided -with inlets and outlets at opposite ends for receiving and delivering air at one end of the cylinderv and liquid at the other end of the cylinder, and a passage'connecting the air outlet at the air end of the cylinder with the water end of the cylinder, whereby the air is delivered from the air end against the reduced pressure of the water end and finally delivered with the water. i

11. A vacuum provided-with inlets and outlets at opposite ends for receiving and delivering air at one end of the cylinder and liquidat the other end of the cylinder, a passage connecting the air outlet at the air end of the cylinder with the water end of the cylinder, whereby the air is delivered from the air end against the reduced pressure of the water end and finally delivered with the water, and a bypass connecting the water delivery with the air end.

12. A vacuum pump having its cylinder provided with inlets and outlets at opposite ends for receiving and delivering air atone end of the cylinder and liquid at the other pump having its cylinder end of the cylinder, a passage connecting the air outlet at the air end of the cylinder with the water end of the cylinder, whereby the air is delivered from the air end against the reducml pressure of the 1 water end and finally delivered wit-lithe water, a hy-pass connectingthe water delivery with the air end, and a cooler on the by-pass.

1.3. A vacuum pump having its cylinder provided with. a suction valveless pistoncontrolled air inlet and valved air discharge at one end of the 'cylinden'a valved water inlet and valved water discharge at the opposite end of thev cylinder, and a passage connecting the ai outlet with the water end of the cylinder, said passage having its cylinder inlet controlled by the piston and posi-r tioned to be opened by the piston at or near the end of the water suction stroke of the piston. i

14:. A provided with a suction valveless piston-controlled air'inlet and valved air discharge at one end of the cylinder, a valved water inlet and valved water discharge at the opposite end of the c linder, a passage connecting the air outlet with the water end of thecylinder,

vacuum pump having itscylinder said passage having its cylinder inlet con-" trolledhy the piston and, positioned to be opened by the piston at or near the end of the water suction strokeof the 'piston,'anda by-pass connecting the liquidzdischarge with the air inlet for supplying water to the air end when the air inlet is opened-by the piston.

inlet for supplyingwater t-o'the air end when the air inlet is opened by the piston, and. a cooler on the by-pass.

In testimony whereof I have hereunto set my hand.

PHILLIPS P.'BOURNE;

A vacuum pump having its cylinder 7 ]')lOV1(lG(l with a suction valveless PlStOIl-COII-

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