US782271A

US782271A - Centrifugal, turbine, or like pump.

Info

Publication number: US782271A
Application number: US20567904A
Authority: US
Inventors: Frederick Ray
Original assignee: HENRY R WORTHINGTON
Current assignee: HENRY R WORTHINGTON
Priority date: 1904-04-30
Filing date: 1904-04-30
Publication date: 1905-02-14
Anticipated expiration: 1922-02-14

Description

No. 782,271. PATENTED FEB. 14, 1905. F. RAY.

CBNTRIFUGAL TURBINE 0R LIKE PUMP.

APPLICATION FILED APB. 30, 1904.

llNiTED STATES FREDERICK RAY, OE EAST ORAN (1E, NEW JERSEY, ASSIGN OR TO HENRY R.

Patented February 14, 1905.

PATENT QEEICE.

WORTHINGTON, OF NEW YORK, N. Y., A CORPORA'IION OF N EW JERSEY.

CENTRIFUGAL, TURBINE, OR LIKE PUNIP.

SPECIFICATION forming part of Letters Patent No. 782,271, dated February 14, 1905.

Application filed April 30, 1904. Serial No. 205,679.

To HN w71 rmt it 11mg/ ferme/2771].'

county of Essex, and State ofNew Jersey, have invented certain new and useful Improvements in (`entrifugal, Turbine, or Like Pumps, full)Y described and represented in the `following specification and the accompanying drawings, forming a part of the same.

This invention relates to that class of centrifugal, turbine, or similar pumps in which inclosed impellers are used, the especial objects of the invention being' to provide a simple and eflicient construction in which friction I is lessened by air-chambers on opposite sides of the impeller, and to provide improved means for balancing the impeller and preventing leakage at the hub.

The invention is applicable to pumps having either a single impeller or series of impellers-that is, either single stage or multistage pumps; but certain features of the invention have been devised in connection with the application of the broad invention to multistage pumps, which features form specific parts of the invention.

For a full understanding of the invention a detailed description of a construction embodying the same in its preferred form as applied to a multistage pump having' two impellers will now be given in connection with the accompanying drawings, forming a part of this specilication, and the features forming the invention will then be speciticallgv pointed out in the claims.

1n the drawings, Figure 1 is a central section of the pump, taken longitudinally of the axis. Fig. 2 is a cross-section on the broken line 2 of Fig. 1. Fig. 3 is an enlarged detail section of a portion of one of the im pellers.

{eferring to said drawings, A is the pumpcasing, having the suction B and delivery C, and 1)' l)72 are the two impellers carried by the sha ft E and separated by the usual diaphragms 10, forming, with the end casings 1,1, the impeller-chambers and the deliver'y-passage from the lirst to the second impeller. The hubs of l the two impellers D D abut against and are Be it known that l, FREDERICK Rana citizen of the United States. residing at East Orange,

separated by the packing-ring 12 on shaft E. The impellers are shown as of a common inclosed type, having the side walls 13 and vanes 1-1 extending between the side walls, and on opposite sides of the impellers are chambers 15, in which run vanes 16, carried on the outside of the impellerwalls 13. These chambers 15 extend from the outer edge of the impeller inward to a packing-ring construction, presently to be described, and the chambers are closed to the water-space of the impeller by the side walls 13 and form airchainbers on the opposite sides of the impeller. The (,leliveigvv of the lirst impeller D passes outward from the impeller through the usual diffusion-ring 17 and then sidewise and downward through the pass ge 18 to the suction of the second impeller l)"', and in this passage 18 are preferably arranged iixed vanes 19, extending downward to the suction of the second impeller. The air is preferabl)Y supplied to all the air-chambers 15 on opposite sides ofthe two impellers by passing the air through 'from one side of the pump to the other, the air being admitted to the outside air-chamber 15 at the delivery end of the pump from an air-compressor or other suitable means through pipe 1, the air passing from the chamber 15 from one side of each impeller to the other through holes 2 in the impeller-varies 1l and through the diaphragms and one of the [ixed vanes 19 bv hole 3, an outlet-opening' 1 from the outside chamber 15 on the impeller 1) being' provided, preferabl \Y controlled by an adjustable air-cock, as shown. Thus the air admitted through pipe 1 will pass through the successive chambers 15 from one side of the pump to the other and out through the escape-pipe l. lt will be understood, however, that a separate supply-pipe ma)Y be used for each of the impellers or each chamber, if desired; but the construction shown is simple and etlieient and is preferably used.

Referring no w to the balancing and leakagepreventingconstruction, each of the impellers is preferably provided at the hub with an opening 20, through which the suction fluid passes to a balancing-chamber Q1 on the rear of the impeller, so as to balance the suctionpressure. rI he impellers are provided also with flanges 5 outside the openings 2O and outside the suction-opening, which flanges form running-joints with shoulders or flanges 6 on the casings and diaphragms outside the suction-openings and balancing-chambers.

Between the air-chambers 15 and the Arunning-joints 5 6 are arranged intermeshing packing-rings, which are formed by projecting rings 7 on the side walls 13 of the impellers alternating with rings 8 on a packing-ring 23, secured within depressions in the casings and diaphragme outside the running-joints 5 6. For the purpose of supplying these packingrings with oil or water, distilled water preferably being used so as to avoid the wear which would result from grit, suitable openings are provided for admitting liquid, and, as in the case of the air-passages above described, these liquid-openings preferably form a passage extending through the pump, so that a single liquid-inlet supplies all the packingrings. As shown, there is a single liquidpassage 9 passing through the outside casing to the outside packing-rings of impeller D, then through the impeller to the packing-rings on the opposite side of this impeller, then through the diaphragms and a fixed vane 19 to the inner packing-rings on impeller D2, then through the impeller to the outer packing-rings on this impeller, and then to the outlet from the casing. It will be understood, however, that as in the case of the air this lubricating and sealing liquid may be supplied to the packing-rings by separate pipes or by a single pipe for each impeller, if preferred.

The complete invention, as above described, provides a very simple and efficient construction of pump with the impellers running in air and with the impellers efficiently balanced and leakage of air prevented. The outside vanes 16 in the air-chambers 15, as will be readily understood, result in a centrifugal action within these chambers, which secures a small body of liquid within the chambers at the outer ends of the vanes, which efliciently seals the chambers against the escape of air at the outer edges of the impellers, this lliquid being outside the air-pipe, so as to permit air to enter through these pipes. These outside vanes also reduce the pressure toward the center to such an extent as to materially reduce the tendency of the air to escape toward the center past the joints 5 6, and such escape is fully prevented by the sealed packing-rings 7 8 between the air-chambers and the running-joints. The outside vanes -15 have been shown as extending from the impeller edge to the packing-rings; but this length may be varied, and in some constructions it may be found that only narrow vanes at the edge of the impellers are required. The construction shown, however, is preferable. The air-chambers are of especial importance in connection with the vanes on the outside of the impeller, as they avoid the friction of water on the sides of the impeller and casing; but the outside vanes, with the balancing-chambers and packing-rings, may be used with the outside vanes, running in liquid instead of air.

While the invention has been shown as applied to a two-stage pump, it will be understood that the broader features of the invention are applicable also to single-impeller pumps and that the same construction may be used for any number of successive impellers.

l/Vhile the openings 20 and balancing-chambers 2,1 are preferably used for balancing the pump, it will be understood that this feature is not essential to the invention, consid-l the combination with an inclosed impeller, of

air-chambers on the opposite sides of the impeller, vanes in said chambers carried by the impeller, and a series of packing-rings on the casing and impeller closing the inner side of said chambers.

3. In a centrifugal, turbine or similar pump, the combination with an inclosed impeller, of air-chambers on the opposite sides of the impeller, vanes in said chambers carried by the impeller, a suction-balancing chamber on the back of the impeller communicating with the impeller-suction, a running-joint outside said balancing-chamber, and packing-rings on the casing and impeller closing the inner side of said air-chambers.

4. In a centrifugal, turbine or similar pump, the combination with an inclosed impeller, of air-chambers on the opposite sides of the impeller, vanes in said chambers carried by the impeller, a suction-balancing chamber on the back of the impeller communicating with the impeller-suction, and a running-joint outside said balancing-chamber.

5. In a centrifugal, turbine or similar pump IOO IOS i IIO IIS

the combination with an inclosed impeller, ot' i air-chambers on the opposite sides ot' the imimpeller, passages through the im peller conneeting the air-chambers, packing-rings on Y the casing and iinpeller closing the inner side l ot' said chambers, and liquii'l-passages through the inipeller connecting the packing-rings on opposite sides of the impeller.

'i'. In a centi'itugal, turbine orsimilar pump,

the combination with an inclosed impeller, ot' i air-chambers on the opposite sides ot' the iinpeller, Yanes in said chambers carried by the impeller, a suction-balancing chamber on the back ot' the impeller communicating' with the impeller-suctioii, a runningjoint outside said balancing-chamber, packing-rings on thecasing and impeller between the air-chambers and joint, and liquid-passages through the impeller connecting' the packing-rings on opposite sides of the impeller.

8. [n a centrifugal` turbine orsimilar pump, the combination with a rotary iinpeller, ot' a balancing-chainber on the back ot' the impeller communicating with the impeller-suction, a running-,joint outside said balancingchamber, a series o'll packing-rings on the casing and iiiipeller outside said running-joint, a chamber on the back of the impeller outside said packing-rings, and Yanes carried by the impeller running in said chamber.

9. lnacentrit'ugal, turbine orsimilar pump, the combination with a rotary impeller, ot' a balancing-chamber on the back ot' the impeller communicating' with the impeller-suction, a running-joint outside said balancingchaniber, a series et' packing-rings on the casing and impeller on each side ot' the iinpeller, \\'anechambers on opposite sides ot' the impeller outside said packing-rings, and Yanes carried by the impeller running in said vanechainleiers.

1l). ln a multistage centrifugal, turbine or siniilarpump, the combination with a plurality of inclosed impellers, of air-chambers on the opposite sides of the impellers, and Yanes in said chambers carried by the iinpellers.

il. In a multistage centrifugal, turbine or similar pump, the combination with a plurality f ot' inclosed impellers, ot' air-chainbers on the l peller, ot' air-chambers on the opposite sides opposite sides ot' the impellers, Yanes in said chambers carried by the impellers, and passages through tlie impellers connecting the airchambers ot' the different iinpellers.

12. ina multistage centrifugal, turbine or similar pump, the combination with a plurality ot' inclosed .impellers, of air-chambers on the opposite sides ot' the impellers` Yanes in said cl'iaiiibers carried by the impellers, and packing-rings on the casing and iiiipellers closing I the inner side ot' said chambers.

1?. In a multistage centrifugal, turbine or similar pump, the combination with a plurality ot' inclosed impellers, of air-chambers on the opposite sides ot' the impellers, Yanes in said chambers carried by the impellers, packingrings on the casing and impellers closing the inner side ot' said chambers, and liquid-passages connecting the packing-rings ot' the dil'- ferent impellers.

il. ,ln a multistage centrifugal, turbine or sim ilar pump, the combination with a plurality of inclosed impellers, ot' air-chanibers on the opposite sides ot' the impellers, Yanes in said chambers carried by the impellers, packing'- rings on the casing and impellers closing the inner side ot' said chambers, passages through the iinpellers connecting the air-chainbers oli the different impellers, and liquid-passages Connecting the packing-rings of the different impellers.

15. The combination with a plui'alityl ot' iuelosed impellers, otl air-cliaiiibers on the opposite sides ot' the impellers, Yanes in said chambers carried by the impellers, balancingchambers ou the backs of the inipellers communicating with the inipeller-suctions, and packing-rings on the casing and iinpeller between the balancing-chambers and air-chainbers.

16. The combination with a plurality of impellers, ot` balaneilig-chambers on the backs ot' the iinpellers communicating with the impeller-suctions, ri'ini'iing-joints outside said balancing-chambers` vane-chambers on the backs ot' the impellers outside said joints, packing-rings on the impellers and casing between said chambers and joints, and Yanes in said vane-chambers carried by the iinpellers.

17. The combination with a plurality ot' impellers, ot' balaueilig-chambers on the backs ot' the impellers communicating with the impeller-suctions, running-joints outside said balancing-chanibers, Ya11e-chambers on opposite sides of the impellers outside said joints, packing-rings on the impellers and casing between said chambers and joints, Yanes in said chambers carried by the impellers, and liquidpassages ci'iiinectingl the packing-rings of the dill'erent iinpellers.

18. In a centrifugal, turbine or similar pump, the combination with an inclosed iinot'the impeller, and passages through the impeller connectingl said chambers.

i9. ln a multistage centrifugal, turbine or similar pump, the combination with a plurality IOO IIO

IO impellel's connecting' the air-chambers of the different impellers, and liquid-passages conneeting the packing-rings of the different impellets.

' ln testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

FREDERICK RAY. Witnesses:

U. J. SAWY'EP., lV. H. KENNEDY.