Патент USA US2107035код для вставки
Feb. 1, 193.8. 2,107,035 s. H.-HAL|_ CLOSED CENTRÍFUGAL SEPARATOR - Filed Jam-2s, 1955 Fm J 576.2'. // 1 Il ...l \\ . 1 H y \\ ,9 Fmi 3. Patented Feb. l, 1938l _ 21,107,035 UNITED STATES 4PATENT OFFICE j l 2,107,035 l cross» cEN'raxFUGAL Seminaren semen n. nan, Poughkeepsie, N. Y., assignm- to The Dc Laval Separator Company, New York, N. Y., a' corporation of New Jersey ` Application January 23, -1935, Serial No. 3,089 In Sweden February 16, 1934 2 (llaims.` (ci. 233-28) . ì _ Hermetically closed separators, especially such -larly to Fig. 2: _l is. the centrifugal separator 5 as are used in dairies, are often coupled in having a hollow spindle or tube 5 forming an series with other apparatus, for instance pas teurizers and the like, in which the separated -components of the liquid are further treated. The liquid must often be passed under rather' high pressure through these latter apparatus. outlet communicating with the central part of The special tightening devices which must be arranged in hermetic separators cannot,~ how the separating space of the bowl and (surround ing pipe 5) an outlet tube or neck 4 forming an annular passage- ¿i communicating with the pe ripheral part of the separating space of the bowl. Fixed pipes 2 and 3 communicate respectively with tubes 5 and 4 and are made tight'by ilexi- ' ever, as a rule stand up to more than a given pressure.- In case one or more apparatus are to ble packings 8. >Secured to the tubes 5 and 4i, which lrotate with the bowl, is a centrifugal pump be coupled -in series it is therefore necessary to interpose pumps between the separator and the said apparatus in order to reduce the load on through which the heavy liquid discharged the stufiing box at the inlet of the separator. According to the present invention centrifugal pump wheels or pump impellers, carried by the `bowl spindle or otherwise arranged to rotate with the bowl, are located directly on the inlet and/or the outlet of the separator, In this way several considerable advantages are attained. The packing at the inlet canl be wholly or partly freed of any load, and pump wheels of the type wheel 6, which is preferably made removable, through tube d must pass on its way to the fixed Í outlet pipe '3. The ldescribed construction is designed for use where apparatus, -such as a pasteurizer. connects only with the pipe 3;l but if a similar apparatus connects, also or instead, with pipe 2, it may be desirable, in exceptional cases, to plac'e a similar centrifugal pump wheel . Ell, also or instead, at the upper end of tube 5. The centrifugal pump wheel in either position hasthe great advantage that it supplies force to referred to are more advantageous ¿in several re y overcome the back pressure on the >outlet Without spects than common pumps. The dimensions of requiring excessive pressure on the packing I8 the wheels. can be small owing to the generally shown in Figs. 3 and 4 at the inlet. If the throughput of the separator is very high number. of revolutions, which means higher eiïect and'more convenient cleaning. Besides, a high, an increased pressure on the separated liquid is necessary at the inlet. .At and over' a. » considerable simplification of the whole instal lation is possible, as both the motor and the driv .given throughput I therefore provide a centrifu ing arrangements may be combined with the -gal pump wheel at the inlet, as shown in Fig. 3. separator. 'I'he accompanying drawing illustrates several embodiments of the invention.L Fig. 1 is an external view of a centrifugal sepa rator having the inlet located at the lower part . of the separator vandthe outlets vat the upper part. . ` The pump wheel I0 is here ñxed to the bored spindle 1 and is surrounded by a ñxed casing member 8a, enclosing a passage communicating `with a pipe Il. through which the liquid to be , separated ñows to the pump wheel, and a ñxed ' casing member 9b which, with vthe AcasingA mem- ‘ ber 9a, encloses a chamber I6 through which the ’ / ` Fig. 2 is a vertical sectional view of the upper ' liquid to be separated flows from the pump wheel part o_f -the separator of Fig. 1, >showing the two outlets and centrifugal , pump impellers, functioning as pressure generators, arranged to rotate with thé separator and positioned at the outlets. ' - - Fig. 3 is a vertical sectional view of the lower to the bored spindle 'I through which the liquid ñows into the bowl. Between the ring Il and the casing member 9a is confined one end of a packing i8 which bears againsty the spindle 1 and prevents, leakage to or from ‘the suction side of the pump. The whole arrangement is kept to part of a separator provided with an inlet at ' gether. by means of a.hand-turnable screw I2 -th'e bottom and a centrifugal pump, functioning as' a pressure generator; arranged to rotate with turnable in a' threaded part i3 of the fixed frame I1, so that no additional sealing devices- are ` the driving spindle and positioned at the inlet. necessary- other than the narrow clearances gen Fig. 4 is a detail view in vertical section of the l erally used in centrifugal.A pumps. -By the del preferred construction of the lower (inlet) end scribed arrangement it is possible to construct of the separator of Figure 1 when the pressure generator is applied at one or both of the outlets throughputs. . 'and not at the inlet. l . „ Referring to Figs. 1 and 2 and more particu# hermetically closed separators even for very high _ A _ , Within chamber I8 are placed one or more wings Il, which may extend radially, and which 2,107,035 , 2 act to reduct the rotative speed oi’ the liquid dur ing its ilow from the pump wheel toward the hollow spindle. . In the arrangement shown in Fig. 3 the suction side of the pump is `turned from the inlet of the spindle, thereby imposing a minimum load on the sealing device I8. For the centrifugal pump wheel shown may be substituted- any other known equivalent device 10 which, when applied to a rapidly rotating mem pumped from the i‘lr'st mentioned chamber to the second mentioned chamber, and guiding wings positioned in the second mentionedchamber and adapted to reduce the rotative speed of the liquid during its ilow from the pump impeller to the l hollow spindle. 2. A centrifugal separating apparatus compris ing a ñxed inlet pipe, ilxed outlet pipes, a rotat able centrifugal separator having outlets in closed communication with the iixed outlet pipes respec ber, will generate pressure in a liquid flow passage, Y tively, a hollow spindle rotating with the sepa~ but the centrifugal pump wheel has certain 'ad -vantagesover other types of pressure generators. What I claim and desire to protect by Letters . Patent is: 1. A centrifugal separating apparatus compris ing a iixed inlet pipe, fixed outlet pipes, a rotat able centrifugal separator having outlets in closed communication with the iixed outlet pipes re spectively, a hollow spindle rotating with the sep arator and through which liquid to be separated is adaptedv to _flow to the separator, casing mem bers providing stationary chambers communi eating withthe ?xed inlet pipe and with the inlet end of said rotatable hollow spindle, respectively, a centrifugal pump impeller mounted on said spindle and through which inñowing liquid is rator and through which liquid to be separated is adapted to ñow to the separator, casing mem bers providing a stationary chamber communi eating with the fixed inlet pipe and through which lsaid spindle passes and a second stationary cham ber below said first chamber and communicating with the inlet end of said rotatable hollow spin dle, ilexible means to seal the joint between said spindle and the wall of said ilrst chamber, and a 20 centrifugal pump impeller mounted on said spin dle and through which inflowing liquid is pumped from said ñrst chamber to said second chamber whereby the sealing means is subjected only to the low pressure obtaining on the suction side of said centrifugal pump impeller. ' . SELDEN H. HALL. .