US2279235A - Discharger for centrifugal machines - Google Patents
Discharger for centrifugal machines Download PDFInfo
- Publication number
- US2279235A US2279235A US238390A US23839038A US2279235A US 2279235 A US2279235 A US 2279235A US 238390 A US238390 A US 238390A US 23839038 A US23839038 A US 23839038A US 2279235 A US2279235 A US 2279235A
- Authority
- US
- United States
- Prior art keywords
- basket
- discharger
- shoe
- shaft
- tip
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/04—Periodical feeding or discharging; Control arrangements therefor
Definitions
- the dischargers used for unloading sugar centrifugals and the like operate with a plowing action.
- the scraping plate or tip of the discharger shoe enters the revolving annular layer of material on the basket wall and has a tendency to dig more and more into the material. This tendency is due to torque reactions of the basket under discharging loads and to elastic deflection of the discharger mechanism under stresses imposed by the discharging operation.
- the discharger tip is forced against the basket screens with such pressure that the linings are torn or quickly worn out, which of course is objectionable and a source of considerable expense.
- Improved dischargers such as those having adjustablestop screws and pivotally attached scraper'tips (Roberts, U. S. Patent No. 2,076,516), have eliminated some of the dangers encountered in normal operation,but, a very real danger of tearing out the delicate basket lining still exists particularly when a hard load of material is being discharged.
- the baskets used in work of this type are of the gyratory suspended type and are susceptible to a certain amount of deflection or swing-out depending directly upon the torque reactions on thebasket spindle. This force is in turn directly proportional to the hardness of the layer of material being discharged and to the speed of revolution of the basket. As long as the hardness of the material and the speed of revolution are constant, the basket deflection or swing-out may remain substantially constant and may be well taken care of by the use of an adjustable stop screw limiting the movement of the scraper toward the centrifugal curb, and of a scraper tip pivotably attached to the discharger shoe.
- the heavy strain placed upon the plow and discharger spindle during the discharging operation also causes an elastic deflection of the discharger mechanism which, like basket swing-out, increases directly with the hardness of the ma-' terial being discharged and the speed of revolu-.
- An object of my invention is'to provide in centrifu'gal' apparatus a discharger mechanism which eliminates the objectionable basket swing-out that occurs during the use of conventional discharger mechanisms, and which protects the basket linings from avoidable damage by the tip of the discharger shoe during the discharging operation.
- Another object of my invention is to provide" a useful force which tends to move the basket wall away from the discharger tip, thereby re-.' ducing thepressure between the discharger tip and the basket screens when the discharger mechanism undergoe elastic deflection under load.
- a further object of this invention is to provide an apparatus bywhich objectionable pressure between the tip of the discharger shoe and the basket screens maybe avoided during discharg ing irrespective of the resistance of the charge to the plowing action of the shoe.
- a stop or force-con plow is within the basket the flange 62 coacts with and rests upon aledge 68. This locates the bushing on the-discharger shaft in such manner that'the inner rim i .of the basket top and the freely running roller 64 lie in the same horizontal plane.
- the support 68 for member 66 is preferably constructed so as to prevent swaying motion of the discharger shaft when under load, for example, by making it of 'arcuate shape to engage around member '66 and beneath the flange 62.
- the bushing is slidably mounted on the discharger shaft it does not in any way hamper the efiicient use of the discharger'plow, andits separable con- 'nection'with the support 68 permits its removal from operating position with the plow when the plow is lifted from within the basket and swung to a position overlying and resting upon the top wall 22-of the curb.
- Fig. 5 The effect of uncontrolled torque reactions, in an apparatus not embodying the present invention, is illustrated diagrammatically in Fig. 5, where P represents the vector of force caused by pressure of the sugar against thedischarger shoe when the discharger is in operation and P represents the vector of force caused by the pressure of sugar on the discharger tip.
- R the resultant force arising from'the torque reaction, is largely counteracted ⁇ by the fact that the roller or stop member M contacts the rim of the basket cap in a region 'where it opposes that force and so prevents inward swinging movement of the-basket wall against the shoe tip in response to R
- a further feature of my improved construction resides in the fact that the discharger shaft is supported at two points during use, by sleeve 44 and hub 32 and by bushing 60 and ledge 68, instead of by the single support, used in prior constructions. This has a beneficial influence on the rigidity of the discharger.
- a centrifugal including a suspended gvratorv basket andv a discharger shaft carrying a; disqharger'shoeadjacent its lower end, meansmounting said discharger shaft on, mixed. verticalaxis. for axial and, turning movement; whereby; to lower the shoe. into the basketand totmove the-shoeinto the contents o f .the;basket while thesame isrevolving, a bush;- ing slidablymounted on-the discharger shaft, -a rollerr carried; bvsaid, bushing, and meansfor hold n said bushing and roller so thatthe roller engages.
- theginner rim o f .the baskettop at a fixed point adjacentsaid shaft when-the dis,-
- charger shoe is.lowered-,to operating position.
- a centrifugal including a suspended: gyr'atory basket and asurrounding curb,,a dischargermechanism mounted on said cu including a vertical discharger shaft; and a discharger" shoe thereon adapted to bemoved into thegcontents of saidbasket when theshaft is ..lowered. into I the basket and turned,;.to dis.- ichalfgesuch. contents, abushing slidably, mount- 1 11,, on;lthe discharger shaft; a roller carried by c said, bushin band cooperatingmeans on-said curb and. said; bushing, for holding said roller. in con,-
- Centrifugal apparatus comprising a suspended, gyratory. basket and asurrounding sta.-
- a centrifugal including a gyratory basket, a discharger mechanism. ineluding a, vertical 'discharger shaft carrying. a. discharger shoe adjacent its lower end, means mounting. said-shaft on a fixed verticalaxisfor axial and turning movementwherebyto move said shoe into and; to discharge thelcontents of the basket while the same is revolving, andmeans located in a fixed position. onsaid shaft during a. discharging. operation toengage the revolving basket. during. such,operation. at a. fixed. location disposed angularlyaway; from a diametrical vertical plane passing throughl the axis of. said bination, a'suspended gyratory.
- a discharger mechanism including a 'discharger shaft. having a discharger. shoe thereon, means, mounting, said shaft for axial and'turning movement on a fixed vertical axis whereby to move said' shoe into and'to discharge the contents of the basket while said assemblyis revolved, and astop member positioned and maintained-atafixed location duringa discharging operationwhereat: said member engages-the revolving assembly and opposes: the: resultant. of reactive; forces on. the assembly that: arise from the. plowing. action ,of the shoe. and. so. prevents swinging movement of; thelrevnlving. basket. wall against th tip of the shoe in response to such forces, said member engaging said assembly only within a limited angular region disposed angularly away from a diametrical vertical plane passing through said tip and the axis of said spindle.
- centrifugal apparatus comprising a suspended gyratory spindle and basket assembly and a discharger mechanism including a discharger shaft having a discharger shoe thereon and means mounting said shaft for axial and turning movement on a fixed vertical axis where by to move said shoe into and to discharge the contents of the basket while said assembly is revolved, a stop member positioned at a fixed location during a discharging operation whereat said member engages the revolving assembly, opposes the resultant of reactive forces on the assembly that arise from the plowing action of the shoe and so prevents swinging movement of the revolving basket wall against the tip of the shoe in response to such forces, and means operated as a result of moving said shaft axially to move said shoe into the basket for positioning and maintaining said member at said location, the place of engagement of said member with said assembly being within a limited angular region disposed angularly away from a diametrical vertical plane passing through said tip and the axis of said spindle.
- Centrifugal apparatus comprising, in combination, a suspended gyratory basket and spindle assembly, a discharger mechanism including a discharger shaft having a discharger shoe thereon, means mounting said shaft for axial and turning movement on a fixed Vertical axis whereby to move said shoe into and to discharge the contents of the basket while said assembly is revolved, and a stop member positioned and maintained at a fixed location during a discharging operation whereat said member engages the revolving assembly, opposes the resultant of reactive forces on the assembly that arise from the plowing action of the shoe, so preventing swinging movement of the revolving basket Wall against the tip of the shoe in response to such forces, and converts such forces into a directional force tending to displace the revolving basket wall away from said tip, said member engaging said assembly only within a limited angular region disposed angularly away from a diametrical vertical plane passing through said tip and the axis of said spindle.
- Centrifugal apparatus comprising, in combination, a suspended gyratory basket and spindle assembly, a discharger mechanism including a discharger shaft having a discharger shoe thereon, means mounting said shaft for axial and turning movement on a fixed vertical axis whereby to move said shoe into and to discharge the contents of the basket while said assembly is revolved, and a stop member positioned and maintained at a fixed location during a discharging operation whereat said member engages the revolving basket, opposes the resultant of reactive forces on the assembly that arise from the plowing action of the shoe, so preventing swinging movement of the revolving basket wall against the tip of the shoe in response to such forces, and converts such forces into a directional force tending to displace the revolving basket wall away from said tip, said member engaging said basket only within a limited angular region disposed angularly away from a diametrical vertical plane passing through said tip and'the axis of said spindle.
Landscapes
- Centrifugal Separators (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL66371D NL66371C (de) | 1938-11-02 | ||
| BE475908D BE475908A (de) | 1938-11-02 | ||
| US238390A US2279235A (en) | 1938-11-02 | 1938-11-02 | Discharger for centrifugal machines |
| GB10318/46A GB610277A (en) | 1938-11-02 | 1946-04-03 | Discharger for centrifugal machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US238390A US2279235A (en) | 1938-11-02 | 1938-11-02 | Discharger for centrifugal machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2279235A true US2279235A (en) | 1942-04-07 |
Family
ID=22897674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US238390A Expired - Lifetime US2279235A (en) | 1938-11-02 | 1938-11-02 | Discharger for centrifugal machines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2279235A (de) |
| BE (1) | BE475908A (de) |
| GB (1) | GB610277A (de) |
| NL (1) | NL66371C (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2778501A (en) * | 1949-12-06 | 1957-01-22 | Western States Machine Co | Centrifugal basket strip linings |
| US3329275A (en) * | 1964-11-20 | 1967-07-04 | Ametek Inc | Centrifugals |
-
0
- NL NL66371D patent/NL66371C/xx active
- BE BE475908D patent/BE475908A/xx unknown
-
1938
- 1938-11-02 US US238390A patent/US2279235A/en not_active Expired - Lifetime
-
1946
- 1946-04-03 GB GB10318/46A patent/GB610277A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2778501A (en) * | 1949-12-06 | 1957-01-22 | Western States Machine Co | Centrifugal basket strip linings |
| US3329275A (en) * | 1964-11-20 | 1967-07-04 | Ametek Inc | Centrifugals |
Also Published As
| Publication number | Publication date |
|---|---|
| GB610277A (en) | 1948-10-13 |
| NL66371C (de) | |
| BE475908A (de) |
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