Патент USA US2404635код для вставки
July 23, 1946. v. A. HOOVER 2,404,635 SEALING MEANS FOR DRIVING MOTORS OF SUBMERSIBLE PUMPS _ Filed Nov. 6, 1945 2 Sheets-Sheet -l ‘m,mm?9Mm.EN\s‘1%.y m;Z m M A. H v; A. HOOVER 2,404,635 SEALING MEANS FOR DRIVING MOTORS OF SUBMERSIBLE PUMPS Filed Nov. 6, 1943 5'5.’ Z_ 2 Sheets-Sheet 2 ‘ J0 J? a?” ’ ' 6-5 16 Z0 J4 40 _ 36 46 44 \A\\\\‘ / 3mm WW0 AHOOVEQ WW 2,404,635 Patented July 23, 1946 UNITED STATES PATENT OFFICE 2,404,635 SEALING MEANS FOR DRIVING MGTORS OF SUBMERSIBLE PUMPS Vaino A. Hoover, Los Angeles, Calif., assignor tov Electrical Engineering and Manufacturing Cor poration, Los Angeles, Calif., a corporation oi‘ California Application November 6, 1943, Serial No. 509,298 11 Claims. 1 This invention has to do, in general, with pumps of the type which are adapted to be sub- merged in the liquid to be pumped. In submerged pumping the entire exposed part of the pump is subjected to the submergence pressure and other parts are also subjected to the discharge pressure which, of course, is higher than the sub mergence pressure. Heretofore, in pumps of this (01. 103——87) 2 for the electric motor 8. The passage I6 dis charges through an opening 24 in the upper or outer end thereof and into a discharge pipe 26. The volutes I2, [4 are circumferentially spaced adjacent the impeller, but at the discharge ends thereof they open into an annular chamber 3!] having inner and outer walls 32, 34 which, when assembled with the Walls I8, 20 are aligned there with to form a continuous passage. At the out type the sealing means for isolating the driving motor housing from the submergence pressure 10 let end thereof the outer wall 34 of chamber 30 is provided with an outwardly-turned annular have been subject to the discharge pressure. and ?ange 36 having two steps or recesses 38, 40 in it has been a principal object of this invention the inner periphery thereof which respectively to provide a submersible pump in which the mo receive the end of outer wall 20 of the passage discharge pressure and in which any leakage of 15 16 and an annular sealing ring 42. A ring 43 having an L-shaped section surrounds the outer pump discharge is vented and cannot enter the wall 20 adjacent the ?ange 36, having one arm motor housing. It has ‘also been an object of 44 parallel to such ?ange and one arm 45 received this invention to provide a submersible pump in in the annular recess 40 in abutment with the cluding a driving motor and in which the various seals which isolate the motor housing may be 20 side face of the sealing ring 42 therein. Bolts 48 connect ?anges 35 and 44 and draw the latter simultaneously adjusted and tightened from a tightly into engagement with the sealing ring, ex common and readily-accessible point. A still panding the same against the outer surface of further object of the invention has been to pro wall 20. vide a new and improved sealing means through The inner diameter of the inner wall 32 of the which the cable which supplies electric power 25 " chamber 39 is equal to the outer diameter of the to the driving motor is led into the motor hous inner wall [8 of chamber l6 whereby the wall 32 mg. may be slipped over the impeller end of wall [8 Other objects and features of novelty of the when the parts are assembled. A flange 50 ex invention will be made apparent by the follow ing description and the annexed drawings which, 30 tends radially inwardly from the inner wall 32 ' and interiorly thereof receives and positions an it will be understood, are only illustrative of the annular member 52 of right angular cross-sec invention and impose no limitations thereon not tion, one annular arm of which abuts the inner imposed by the appended claims. surface of cylindrical wall 32 and extends toward Referring to the drawings, in which similar the outer end of inner wall 18 of chamber (6, a reference numerals refer to like parts, space being left between the two in which an Fig. 1 is a longitudinal sectional view of a sub entirely enclosed sealing ring 54 is positioned. mersible pump including sealing means accord Jack-screws 55 extend through ?ange 59 into ing to the invention, and engagement with the rear face of annular mem .igs. 2, 3 and 4 are enlarged views of sealing ber 52 and are operable to move it toward and means disclosed in Fig. l. away from sealing ring 54 in order to vary the The pump device disclosed in the drawing com pressure on the sealing ring. prises an intake 2 which communicates with a An oil chamber 6% is positioned interiorly of volute chamber 3 in which an impeller 4 is ro the ?ange 53 and has an outer radial wall 62 tatably mounted on the end of the armature shaft 6 of an electric motor 8. The volute cham 45 which abuts the inner surface of such ?ange and is connected thereto by bolts $4, a cylindrical ber communicates with two diametrically-oppo wall 66 which tightly ?ts the inner surface of site volutes I2, i4 having openings therebetween inner wall 18 of passage I6, and a second radial through which the liquid in which the pump is wall 68 which is adjacent the motor end of the submerged is admitted to the space between the volutes and into contact with the sealing means 50 oil casing, all of said walls being integrally con nected, and shaft sealing means being interposed for the drive shaft. The volutes discharge into between the radial walls 62, E8 and the shaft 6. the annular passage l6 Whichis defined between Access to the interior of the oil chamber is pro the spaced inner and outer walls 1 8, 26 of a cylin vided by screw plugs (not shown) in the wall drical housing which forms a continuation of the volutes and surrounds and forms a housing 55 thereof, which may be reached by walled open tor housing sealing means is not subject to pump 2,404,635 3 ings (not shown) through walls I8, 20 of pas sage I6. At the motor end of the oil chamber the pe ripheral wall 60 thereof is formed with a recess 80 within which an annular sealing ring 82 is positioned. A split ring 84 is also positioned within the recess 80 and is held from movement in the direction of the motor by an annular ridge 86 which is formed integrally with the inner wall It of chamber I6 and extends inwardly there 4 I22, which surrounds the cable I20, is also sub lect only to the submergence pressure. The sealing means 82 and III] which isolate the motor housing from the surrounding ?uid may be simultaneously tightened or adjusted in the following manner. When bolts II4 are operated to increase the pressure on sealing ring IIO, the casing 93, I00 is pulled to the right as viewed in the drawings, These parts are connected to the 10 oil chamber in the manner and through the parts from. The wall 68 of the oil chamber is connected to the drive end bell 90 of the motor by bolts 92, described hereinbefore and the oil chamber will therefore also be pulled to the right as viewed . in the drawings, thus tightening the sealing ring the end bell is connected to the stator 94, the 02 between the oil chamber and ring 84 which is stator is connected to the commutator end bell 15 held from movement to the right by means of ridge 86. 0S, and the commutator end bell is connected to a cylindrical member 98 having an integral outer It has heretofore been the practise to lead the end wall I00, which is concentrically arranged electric wiring, such as cable I20, through parts within inner wall I8 of passage I6 and supports of the pump which are subjected to discharge the outer end of easing I8, 20 in a manner to be 20 pressure, whereby sealing means capable of re described. The annular space between cylindri sisting discharge pressure must be provided. By cal wall 90 and the inner wall I 8 of passage I6 the present invention, however, the cable I20 is is closed by a wall I02 which is integrally or per led through the casing 98, I00 directly into the manently connected to wall I 8 at its outer pe surrounding ?uid whereby the sealing means I22 riphery and at its inner periphery is formed with are only required to withstand the submergence pressure. a ?ange I04 the inner wall of which abuts the outer surface of the cylindrical wall 08. An By reason of the described structure and ar annular cap I 06 having a peripheral ?ange I00 rangement of parts the motor and pump, includ ?ts over the outer surface of wall 98 and is inter ing the volutes, may be assembled as a unit out nally recessed at I ID to form, with the end of side of the casing formed by walls I6, I8, after ?ange I04, a recess within which an annular seal which the casing may be slipped over this unit ing ring H2 is positioned and which may be ex- . and secured thereto. Further, the casing may be panded into tight engagement with the outer easily removed from the unit without dismantling surface of wall 98 by tightening bolts II4 Which it and without disconnecting the electric wiring attach cap I06 to the end Wall I00. cable I20 from the motor, this being done by re At the center of the end wall I00 there is moving the means which connect the motor and formed an axial opening through which extends pump unit to the casing and then slipping the the cable I20 which supplies electric energy from casing o?“ of the unit and along the Wiring cable. a source to the electric motor 8. The outer part While I have described and illustrated one form of this opening is of greater diameter than the 40 which my invention may take, it will be apparent cable, thereby providing an annular recess within to those skilled in the art that other embodi '- which a sealing ring I22 is positioned and which ments, as well as modi?cations of that disclosed, may be expanded into sealing engagement with may be made without departing in any way from the cable by means of an annular device I24 of the spirit or scope of the invention, for the limits L-shaped section which surrounds the cable and 45 of which reference must be had to the appended is attached to the end wall I00 by bolts I26. claims. . The functions, purposes and operation of the I claim: various devices and parts will now be described. 1. A submersible pump comprising elongated The impeller discharge ?ows through the volutes spaced concentric cylindrical inner and outer I2, I4 into the annular passage I0. There is no 50 walls de?ning a passage therebetween for ?uid communication between the volutes or passage I6 and the interior of the motor casing which is. under pressure and forming an open-ended cham ber within the inner wall, a motor within said therefore, never subjected to pump discharge chamber and having a housing attached thereto pressure. Any leakage at the joint between the at one end thereof, sealing means between said volutes and passage I6, if not sealed by ring 42, 55 housing and said inner wall to prevent the pas will ?ow to the outside ?uid within which the sage of ?uid into the motor, an oil chamber at pump is submerged. Any leakage past sealing tached to the motor at the other end thereof, ring 54 will ?ow around ?ange 50 to the space sealing means between the oil chamber and said between the volutes, which is open to the ?uid inner wall for preventing the passage of ?uid into within which the pump is submerged. The seal 60 the motor, means for compressing the ?rst-named ing means surrounding shaft 6 are operable to sealing means, and means operable by operation prevent seepage along the shaft, but it will be of said compressing means for compressing the noted that even here the pressure would be only second-named sealing means. the submergence pressure and not the pump dis 2. A submersible pump comprising spaced con charge pressure. Any tendency of the surround 65 centric inner and outer walls de?ning a ?uid ing ?uid to seep between the inner surface of wall passage therebetween and forming an open I8 and the outer surface of the oil chamber wall ended chamber, a motor within said chamber, 56 is prevented by sealing ring 82 and it will be an oil chamber positioned within said chamber noted that such sealing ring will only be sub adjacent one end of the motor and comprising jected to the submergence pressure and not to the axially-spaced radial walls and a cylindrical wall discharge pressure. At the outer or upper end of which is integral with the radial walls and tightly the pump any tendency of the surrounding ?uid ?ts the inner surface of the inner concentric wall to pass between walls 98 and I02 is prevented by and which is formed with an annular recess in sealing ring I I0 which, it will be noted, is subject its periphery adjacent the motor, an annular only to the submergence pressure. Sealing ring ridge formed on said inner concentric wall be 2,404,685 5 6 tween the motor and oil chamber and being ad jacent said annular recess, and sealing means positioned in the annular recess and adapted to be compressed between the bottom of the recess and said ridge by movement of the oil chamber toward the motor. 3. A submersible pump comprising spaced con therebetween and forming an open-ended chamber within the inner wall, a motor with in said chamber, a cylindrical wall extend ing from the motor and being within and concentric with and of less diameter than said inner wall, a generally radial wall connected to said cylindrical wall at the outer end thereof and centric inner and outer walls de?ning a ?uid pas forming a closure for the open end thereof and having an opening therein for the passage of a sage therebetween and forming an open-ended chamber therein, a motor within said chamber, 10 cable, means for sealingly closing the space be tween the cylindrical wall and the inner wall, an oil chamber positioned within said chamber and means for compressing said sealing means to adjacent one end of the motor and comprising increase the sealing effect thereof. axially-spaced radial walls and a cylindrical wall 9. A submersible pump comprising a casing formed integrally with the radial walls and tight having spaced concentric cylindrical walls form ly ?tting the inner surface of the inner concentric ing an annular passage for ?uid therebetween, wall, a ?ange extending inwardly from the inner means closing said passage at one end and hav concentric wall adjacent one end of the oil cham ing an opening therein for the discharge of fluid berjmeans rigidly attaching the oil chamber to from said passage, a motor unit removably mount said radial ?ange, and sealing means between ed in the space within the inner wall, a pump im the outer end edge of the inner concentric wall peller, a shaft operatively connecting the motor and said ?ange and being in sealing engagement to the impeller, volute chambers surrounding the ' with the inner concentric wall. impeller and connected to said casing to discharge 4, The submersible pump structure according into said annular passage ?uid delivered to said to claim 3, comprising in addition means for volutes by said impeller. compressing the sealing means axially of the inner concentric wall to thereby force the same tightly into engagement with the inner concentric wall. 5. The submersible pump structure according to claim 3, comprising in addition, an annular ~, member having an L-shaped cross-section dis posed between the ?ange and the oil chamber and having one arm thereof surrounding the oil chamber and being in engagement with said seal ing means, and means for moving said annular member toward and away from the sealing means. 6. In a submersible pump, spaced concentric inner and outer walls de?ning a ?uid passage therebetween and forming an open-ended cham ber within the inner wall, a motor within said chamber, a generally radial wall closing one end of the chamber and being entirely within said inner wall and having an opening therein through which an electric cable is adapted to pass, and sealing means within said opening to prevent the leakage of ?uid between the cable and the wall of the opening. '7. In a submersible pump, spaced concentric inner and outer walls de?ning a ?uid passage therebetween and forming an open-ended cham 55.) ber within the inner wall. a motor within said chamber, a cylindrical wall extending from the motor and being within and concentric with and of less diameter than said inner wall, a gener ally radial wall connected to said cylindrical wall at the outer end thereof and forming a closure for the open end thereof and having an opening therein for the passage of a cable, sealing means within said opening for preventing the passage of ?uid between the cable and the wall of the open ing, and an annular radial wall closing the space between the cylindrical wall and the inner wall. 8. In a submersible pump, spaced concentric inner and outer walls de?ning a ?uid passage 10. A submersible pump comprising a casing having spaced concentric cylindrical walls form ing an annular passage for ?uid therebetween, said passage being closed at one end and having an opening at said end for the discharge of ?uid therefrom, a motor disposed in the space Within the inner wall, means connected to each end of the motor and extending axially therefrom in op posite directions and being respectively release ably attached to said inner wall whereby the motor may be removed from its position within said casing, a pump impeller at one end of said casing, means operatively connecting said im peller to the motor, and means for conducting ?uid delivered by said impeller to said annular passage. 11. A submersible pump comprising spaced con centric cylindrical inner and outer walls de?n ing an annular ?uid passage therebetween and an open-ended chamber within the inner wall, said walls being joined at one end of the pump to close said annular passage and having a ?uid delivery opening therein at said end, impeller means at the other end of the pump having access to the exterior thereof, means for directing ?uid delivered by said impeller into said annular pas sage, a motor in the chamber within the inner wall, means drivably connecting the motor to the impeller, sealing means preventing the passage of ?uid surrounding the impeller into contact with the motor, means at the delivery end of the pump and disposed entirely in the chamber within the inner wall for preventing the passage of ?uid from the exterior into contact with the motor and hav ing an opening through which an electrical cable is passed to the motor, and sealing means pre venting the passage of ?uid through said open ing and about said cable. VAINO A. HOOVER.