CA1331977C - Centrifugal separator with rotating seals on the fixed upper head - Google Patents
Centrifugal separator with rotating seals on the fixed upper headInfo
- Publication number
- CA1331977C CA1331977C CA000572559A CA572559A CA1331977C CA 1331977 C CA1331977 C CA 1331977C CA 000572559 A CA000572559 A CA 000572559A CA 572559 A CA572559 A CA 572559A CA 1331977 C CA1331977 C CA 1331977C
- Authority
- CA
- Canada
- Prior art keywords
- conduit
- fixed
- liquid
- ring
- rings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
- B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
Landscapes
- Centrifugal Separators (AREA)
Abstract
AN IMPROVED CENTRIFUGAL SEPARATOR WITH
ROTATING SEALS ON THE FIXED UPPER HEAD
ABSTRACT OF THE DISCLOSURE
The liquid being handled is introduced through a centrifugal conduit 1, is separated according to the different density and the two liquid phases exit through conduits 4 and 5.
The centrifugal separator comprises disks for sealing (6, 11 and 19) which are fixed respectively to the central part of the rotor 7 to the middle disk 12 and to the upper cover 20 of the apparatus against which the moveable shaped rings (8, 13, 14 and 17) press. The moveable rings are subjected to the pressure of the liquid being introduced into the separator as well as the pressure of the two liquid phases being separated by centrifugation due to the difference in specific weight. In this manner, a perfect seal between the different phases is ensured, no biasing means are needed and there is no necessity of particular external cooling.
ROTATING SEALS ON THE FIXED UPPER HEAD
ABSTRACT OF THE DISCLOSURE
The liquid being handled is introduced through a centrifugal conduit 1, is separated according to the different density and the two liquid phases exit through conduits 4 and 5.
The centrifugal separator comprises disks for sealing (6, 11 and 19) which are fixed respectively to the central part of the rotor 7 to the middle disk 12 and to the upper cover 20 of the apparatus against which the moveable shaped rings (8, 13, 14 and 17) press. The moveable rings are subjected to the pressure of the liquid being introduced into the separator as well as the pressure of the two liquid phases being separated by centrifugation due to the difference in specific weight. In this manner, a perfect seal between the different phases is ensured, no biasing means are needed and there is no necessity of particular external cooling.
Description
:-. :. , The present invention relates to cenkrifugal separators for liquids and~is particularly intended for use in~the milk industry but may àlso be~used for mineral oils, vegetable oils or other liquid mixtures in which, due to the centrifugal force; the liquids are separated in their different components which have different density.
~ A~centrifugal separator of this type is desaribed in ; Canadian Patent No. 1,218,817 assigned to the same assignee and issued on April 19, l990.
10The earlier invention provides that the li~uids having different density are separated under the action of the centrifugal force of the apparatus by being caused to ascond within annular concentric conduits formed in the rotating part of the apparatus and then~ being distributed through conduits formed in~the fixed head of tho apparatus~
or the various destinations.
The hermetlc seals between the rotating part of the apparatus and the fixed head are ensured in the earlier invention by means of moveable rings which rota;te together ~0 with the rotating part of!the`apparatus, tho rings coming in aontact with other~rings flxod resiliently to the fixed upper part of the~ appa~ratus, ~a fact which eliminates any posslbillty of contact of the various liquid phases with the atmosphere. Suitable conduits lcm:sd :
~ 1331977 ~-.: :.-are provided for letting cooling water under pressure flow through for the purpose of cooling both the fixed rings as -~
well as the rotating rings which guarantee the seal. -The seal between the movable rings and the fixed ,. :, - .
rings is ensured in the apparatus according to the earlier invention by suitable springs which act on rings which do not rotate because they are disposed on the fixed part of the apparatus but are subjected to the action of the compression springs which push the rings downwardly. Therefore, the rings which do not rotate~are compelled to remain in contact with the movable rings located in the rotating part of the apparatus, thus avoiding that the liquids separated due to the centrifugal force mix again among themselves.
The solution gives rise, howeverj to some drawbacks due mainly to the complexity of the hydraulic circuits involved in the separation of the liquids as well as the presence of the compression springs which involve very vulnerable structures, which require continuous control and require frequent replacement as the result also of the properties of the liquids being used.
An object of the present invention is to improve the centrifugal separator of the earlier invention and to eliminate the drawbacks mentioned hereinabove.
In the present invention the fixed head of the apparatus is substantially simplified and the seals between the several axial conduits are ensured by shaped rings which are movable with respect to the fixed parts of the apparatus.
.
These movable rings come in contact with rings which are ~ ;
VLS:jj 2 ;~ '', ',', ''.,'-,;',"',;
~ ~ 3 3 1 ~ 7 7 ~
fixed with respect to the rotating parts of the apparatus because of the pressur~ of the liquids which acts on the movable rings, thus obtaining substantial simplification of the hydraulic circuits o~ the apparatus and permitting above all to eliminate every type of elastic spring, thus simplifying the operation and the maintenance of the apparatus.
In particular the displacement of the rings involved in the seal causes that they are lapped directly by :. . .
lo the components of the liquids in the apparatus, a fact which causes absorption of the heat produced in the motion of the rings, thus eliminating the necessity of providing cooling of the liquids by means of water circulation as provided in the earlier application.
The invention will be explained in more detail hereinbelow by reference to the drawing in which:
Fig. 1 is a view of the upper part of the centrifugal separator partially axially in cross-section with the rotating seals according to the present invention.
As shown in Fig. 1, the liquid being handied is introduced into the centrifugal separator through the central conduit 1 and exits a~ter having been separated in the two phases of different specific weight through the coaxial conduits 2 and 3. In particular the phase of lower specific weight which ascends through the coaxial more internal conduit 2 is brought to the coaxial conduit 4 which is disposed in the fixed head of the apparatus at the outlets whi}e the phase with greater specific weight which ascends VLS:jj 3 : ' ~
1331977 ~ ~
from the external coaxial conduit 3 exits through the exit outlet 5 which is disposed in the fixed part of the apparatus. The arrows shown in the figure designate the course performed by the different liquid phases.
The seal between the central inlet conduit 1 and the first coaxial exit conduit 2 is ensured by the ring 6 which is fixed to the central part 7 of the rotor. The movable ring 8 comes in contact with central part 7 of the rotor. The movable ring 8 is located coaxially with respect to the central tube 1 and comes in contact with its upper lip 8' with the fixed ring 6, under the thrust action of the pressure of the liquid present in conduit 1, which pressure is exerted along the direction of the arrows 9.
The stop element 10 is fixed to the central conduit 1 but limits the opening motion of the movable ring 8.
Analogously, the seal between the liquids of the coaxial conduits 2 and 3 is ensured by the fixed ring 11 ,, ~. ~ . . ;..
which is EixQd to the disk 12, the latter closing in the upper part the conduit 2 and the two rings 13 and 14. The ;
motion of the rings 13 and 14 is limited by the stop elements ~;
15 and 16 which are Eixed to conduit 4. The two rings, 13 and 14, subjected respectively to the pressure of the liquid ;, . ~::
of the light phase which comes from conduit 2 and to the pressure of the liquid of the heavy phase which comes from conduit 3.
Analogously, the external seal is ensured by the movable ring 17 which is coaxial with the external conduit 5 and -~
`; ,' . ,;. :' ',~'.
~ VLS-jj 4 ;;
. . ,: .
''',,'"`:`~
"; i331977 which is limited in its motion by the stop element 18, the latter being fixed to the external wall of conduit 5. The external seal is also ensured by the fixed ring 19 which is fixed to the head 20 of the apparatus.
The advantages resulting from the present invention , .
and specifically the head of the centrifugal separator for the li~uids with rotating seals with respect to the head of the earlier centrifugal separator described in the Canadian Patent No. 1,218,817 are clear~not only with respect to the substantial simplification in the construction of the apparatus but also~above all because of the elimination of~
elastic elements and speclfically springs because the seal between the moveable rings and the fixed~rings is ensured by . ~.
the same pressure exerted by the li~uid on the same moveable rings.
It should also be stressed that there is a substantial advantage resulting by the cooling performed by the same liquids on the rings, without the necessity of providing for the cooling by means of circulation of cold water under pressure.
Obviously, the apparatus has been described and illustrated in the drawing attached hereto according to one specifia embodiment which, however, has been described only ' ~ by way of a non-limiting example because the particular constructional~details~may be~varied~in form and different aspects, while the essential characteristics of the invention ;~ remain unchanged.
~ lcm:sd 5 ... . .
, ~ ,.,...,,~;, s
~ A~centrifugal separator of this type is desaribed in ; Canadian Patent No. 1,218,817 assigned to the same assignee and issued on April 19, l990.
10The earlier invention provides that the li~uids having different density are separated under the action of the centrifugal force of the apparatus by being caused to ascond within annular concentric conduits formed in the rotating part of the apparatus and then~ being distributed through conduits formed in~the fixed head of tho apparatus~
or the various destinations.
The hermetlc seals between the rotating part of the apparatus and the fixed head are ensured in the earlier invention by means of moveable rings which rota;te together ~0 with the rotating part of!the`apparatus, tho rings coming in aontact with other~rings flxod resiliently to the fixed upper part of the~ appa~ratus, ~a fact which eliminates any posslbillty of contact of the various liquid phases with the atmosphere. Suitable conduits lcm:sd :
~ 1331977 ~-.: :.-are provided for letting cooling water under pressure flow through for the purpose of cooling both the fixed rings as -~
well as the rotating rings which guarantee the seal. -The seal between the movable rings and the fixed ,. :, - .
rings is ensured in the apparatus according to the earlier invention by suitable springs which act on rings which do not rotate because they are disposed on the fixed part of the apparatus but are subjected to the action of the compression springs which push the rings downwardly. Therefore, the rings which do not rotate~are compelled to remain in contact with the movable rings located in the rotating part of the apparatus, thus avoiding that the liquids separated due to the centrifugal force mix again among themselves.
The solution gives rise, howeverj to some drawbacks due mainly to the complexity of the hydraulic circuits involved in the separation of the liquids as well as the presence of the compression springs which involve very vulnerable structures, which require continuous control and require frequent replacement as the result also of the properties of the liquids being used.
An object of the present invention is to improve the centrifugal separator of the earlier invention and to eliminate the drawbacks mentioned hereinabove.
In the present invention the fixed head of the apparatus is substantially simplified and the seals between the several axial conduits are ensured by shaped rings which are movable with respect to the fixed parts of the apparatus.
.
These movable rings come in contact with rings which are ~ ;
VLS:jj 2 ;~ '', ',', ''.,'-,;',"',;
~ ~ 3 3 1 ~ 7 7 ~
fixed with respect to the rotating parts of the apparatus because of the pressur~ of the liquids which acts on the movable rings, thus obtaining substantial simplification of the hydraulic circuits o~ the apparatus and permitting above all to eliminate every type of elastic spring, thus simplifying the operation and the maintenance of the apparatus.
In particular the displacement of the rings involved in the seal causes that they are lapped directly by :. . .
lo the components of the liquids in the apparatus, a fact which causes absorption of the heat produced in the motion of the rings, thus eliminating the necessity of providing cooling of the liquids by means of water circulation as provided in the earlier application.
The invention will be explained in more detail hereinbelow by reference to the drawing in which:
Fig. 1 is a view of the upper part of the centrifugal separator partially axially in cross-section with the rotating seals according to the present invention.
As shown in Fig. 1, the liquid being handied is introduced into the centrifugal separator through the central conduit 1 and exits a~ter having been separated in the two phases of different specific weight through the coaxial conduits 2 and 3. In particular the phase of lower specific weight which ascends through the coaxial more internal conduit 2 is brought to the coaxial conduit 4 which is disposed in the fixed head of the apparatus at the outlets whi}e the phase with greater specific weight which ascends VLS:jj 3 : ' ~
1331977 ~ ~
from the external coaxial conduit 3 exits through the exit outlet 5 which is disposed in the fixed part of the apparatus. The arrows shown in the figure designate the course performed by the different liquid phases.
The seal between the central inlet conduit 1 and the first coaxial exit conduit 2 is ensured by the ring 6 which is fixed to the central part 7 of the rotor. The movable ring 8 comes in contact with central part 7 of the rotor. The movable ring 8 is located coaxially with respect to the central tube 1 and comes in contact with its upper lip 8' with the fixed ring 6, under the thrust action of the pressure of the liquid present in conduit 1, which pressure is exerted along the direction of the arrows 9.
The stop element 10 is fixed to the central conduit 1 but limits the opening motion of the movable ring 8.
Analogously, the seal between the liquids of the coaxial conduits 2 and 3 is ensured by the fixed ring 11 ,, ~. ~ . . ;..
which is EixQd to the disk 12, the latter closing in the upper part the conduit 2 and the two rings 13 and 14. The ;
motion of the rings 13 and 14 is limited by the stop elements ~;
15 and 16 which are Eixed to conduit 4. The two rings, 13 and 14, subjected respectively to the pressure of the liquid ;, . ~::
of the light phase which comes from conduit 2 and to the pressure of the liquid of the heavy phase which comes from conduit 3.
Analogously, the external seal is ensured by the movable ring 17 which is coaxial with the external conduit 5 and -~
`; ,' . ,;. :' ',~'.
~ VLS-jj 4 ;;
. . ,: .
''',,'"`:`~
"; i331977 which is limited in its motion by the stop element 18, the latter being fixed to the external wall of conduit 5. The external seal is also ensured by the fixed ring 19 which is fixed to the head 20 of the apparatus.
The advantages resulting from the present invention , .
and specifically the head of the centrifugal separator for the li~uids with rotating seals with respect to the head of the earlier centrifugal separator described in the Canadian Patent No. 1,218,817 are clear~not only with respect to the substantial simplification in the construction of the apparatus but also~above all because of the elimination of~
elastic elements and speclfically springs because the seal between the moveable rings and the fixed~rings is ensured by . ~.
the same pressure exerted by the li~uid on the same moveable rings.
It should also be stressed that there is a substantial advantage resulting by the cooling performed by the same liquids on the rings, without the necessity of providing for the cooling by means of circulation of cold water under pressure.
Obviously, the apparatus has been described and illustrated in the drawing attached hereto according to one specifia embodiment which, however, has been described only ' ~ by way of a non-limiting example because the particular constructional~details~may be~varied~in form and different aspects, while the essential characteristics of the invention ;~ remain unchanged.
~ lcm:sd 5 ... . .
, ~ ,.,...,,~;, s
Claims (6)
1. In centrifugal separator for the separation of a liquid into several phases of different density which comprises a fixed upper head (20), a rotating body (7) having a central part, an inlet conduit (1) for said liquid into said rotating body, concentric conduit means (2 and 3) for the different phases of different density, the liquid of lower density ascending through the more internal conduit (2), the liquid of greater density ascending through the external conduit (3), said conduit (2) communicating with coaxial outlet conduit (4) disposed in said fixed head, said conduit (3) communicating with coaxial outlet conduit (5) disposed in said fixed head, the improvement which comprises a ring (6) fixed to said central part of the rotating body, movable rings (8, 13, 14 and (7) suitably shaped and capable of displacement, said ring (8) being capable of displacing with respect to the central conduit (1), said ring (8) being located coaxially with respect to said inlet conduit (1) and under the thrust of the pressure of the liquid in said inlet conduit (1) coming in contact with said fixed ring (6) and providing a seal between said inlet conduit (1) and said internal conduit (2), a fixed disk (12) located in the upper part of said conduit (2), said rings (13 and 14) being capable of displacement with respect to the coaxial outlet conduit (4) and being subject to the pressure of the liquid of lower density from said conduit (2) and to the pressure of liquid of greater density from said conduit (3) and providing a seal between the liquids in the conduit (2) and conduit (3), said ring (17) being external and being coaxial with said outlet conduit (5), said ring (17) being capable of displacement along the outlet conduit (5) and providing an external seal, said movable rings ensuring hermetic seals and ensuring a perfect separation between the various phases without requiring return springs.
2. A centrifugal separator according to claim 1 wherein the rings are lapped by the liquids whereby they are cooled.
3. The separator according to claim 1 wherein a stop element (10) fixed to said inlet conduit (1) limits the motion of said movable ring (8).
4. The separator according to claim 1 wherein stop elements (15 and 16) fixed to said conduit (4) limit the motion of said rings (13) and (14).
5. The separator according to claim 1 wherein said conduit (5) has an external wall, and a stop element (18) fixed to the external wall of said conduit (5) limits the motion of said ring (17).
6. The separator according to claim 5 wherein a fixed ring (19) fixed to said upper head (20) ensures external seal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT85.588/A/87 | 1987-08-03 | ||
| IT85588/87A IT1218817B (en) | 1987-08-03 | 1987-08-03 | CENTRIFUGAL SEPARATOR REFINEMENTS WITH ROTARY SEALS ON THE FIXED UPPER HEAD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1331977C true CA1331977C (en) | 1994-09-13 |
Family
ID=11328559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000572559A Expired - Fee Related CA1331977C (en) | 1987-08-03 | 1988-07-20 | Centrifugal separator with rotating seals on the fixed upper head |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0302386B1 (en) |
| JP (1) | JPS6490050A (en) |
| KR (1) | KR890003454A (en) |
| CN (1) | CN1015294B (en) |
| AT (1) | ATE102496T1 (en) |
| AU (1) | AU606967B2 (en) |
| CA (1) | CA1331977C (en) |
| CZ (1) | CZ541088A3 (en) |
| DD (1) | DD272420A5 (en) |
| DE (1) | DE3888258D1 (en) |
| IT (1) | IT1218817B (en) |
| PL (1) | PL273983A1 (en) |
| RO (1) | RO105379B1 (en) |
| SU (1) | SU1667628A3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6019499A (en) * | 1995-04-18 | 2000-02-01 | Advanced Molecular Technologies, Llc | Method of conditioning hydrocarbon liquids and an apparatus for carrying out the method |
| DE20010743U1 (en) | 2000-06-16 | 2000-10-12 | Westfalia Separator Food Tec GmbH, 59302 Oelde | Centrifuge with double inlet |
| MD892Z (en) * | 2014-05-26 | 2015-10-31 | Николае ЛАПОВЩЮК | Device and process for separating a liquid homogeneous mixture |
| DE102015117375A1 (en) * | 2015-10-13 | 2017-04-13 | Gea Mechanical Equipment Gmbh | separator |
| CN105675249B (en) * | 2016-03-28 | 2018-06-19 | 北京航天长征飞行器研究所 | A kind of sliding extension device for motion platform thermal protection stable water supply |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2651455A (en) * | 1950-07-07 | 1953-09-08 | Laval Separator Co De | Seal for centrifugal separators |
| US3126338A (en) * | 1959-11-30 | 1964-03-24 | Hermetically sealable mounting means | |
| CH470612A (en) * | 1968-01-25 | 1969-03-31 | Bbc Brown Boveri & Cie | Floating ring seal |
| SU772567A2 (en) * | 1977-03-23 | 1980-10-23 | Севастопольский Приборостроительный Институт | Apparatus for cleaning water from oil products |
| US4194745A (en) * | 1979-05-02 | 1980-03-25 | Mcdougal Thomas L | Controlled clearance seal |
| GB8332074D0 (en) * | 1983-12-01 | 1984-01-11 | Flexibox Ltd | Backup seal |
| US4722534A (en) * | 1985-12-18 | 1988-02-02 | Borg-Warner Industrial Products, Inc. | Face seal with automatic face convergence means |
-
1987
- 1987-08-03 IT IT85588/87A patent/IT1218817B/en active
-
1988
- 1988-07-14 AU AU19027/88A patent/AU606967B2/en not_active Ceased
- 1988-07-20 CA CA000572559A patent/CA1331977C/en not_active Expired - Fee Related
- 1988-07-26 KR KR1019880009407A patent/KR890003454A/en not_active Application Discontinuation
- 1988-07-28 AT AT88112188T patent/ATE102496T1/en active
- 1988-07-28 DE DE88112188T patent/DE3888258D1/en not_active Expired - Lifetime
- 1988-07-28 EP EP88112188A patent/EP0302386B1/en not_active Expired - Lifetime
- 1988-07-30 PL PL27398388A patent/PL273983A1/en unknown
- 1988-08-01 RO RO134751A patent/RO105379B1/en unknown
- 1988-08-01 DD DD88318538A patent/DD272420A5/en not_active IP Right Cessation
- 1988-08-02 CZ CS885410A patent/CZ541088A3/en unknown
- 1988-08-02 SU SU884356307A patent/SU1667628A3/en active
- 1988-08-03 JP JP63194314A patent/JPS6490050A/en active Pending
- 1988-08-03 CN CN88104868A patent/CN1015294B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6490050A (en) | 1989-04-05 |
| IT1218817B (en) | 1990-04-19 |
| EP0302386B1 (en) | 1994-03-09 |
| CN1015294B (en) | 1992-01-15 |
| CN1031032A (en) | 1989-02-15 |
| CZ541088A3 (en) | 1993-02-17 |
| DE3888258D1 (en) | 1994-04-14 |
| KR890003454A (en) | 1989-04-14 |
| SU1667628A3 (en) | 1991-07-30 |
| EP0302386A3 (en) | 1991-04-17 |
| AU1902788A (en) | 1989-02-09 |
| RO105379B1 (en) | 1994-11-14 |
| PL273983A1 (en) | 1989-04-17 |
| EP0302386A2 (en) | 1989-02-08 |
| DD272420A5 (en) | 1989-10-11 |
| IT8785588A0 (en) | 1987-08-03 |
| AU606967B2 (en) | 1991-02-21 |
| ATE102496T1 (en) | 1994-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |