JP3623429B2 - Disposable self-driven centrifuge rotor assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates generally to the design and construction of self-driven centrifuges made up of disposable components. More specifically, the first embodiment of the present inventionAssembly of stacked conical membersWhenRotor outer shellSelf-driven, including structural forms as well as selected materials, designed to be disposable as a wholeCentrifugal separator using a stack of conical membersRelated to the design and structure. In a related embodiment, all disposable design features are retained,Assembly of stacked conical membersHas been removed.
[0002]
[Prior art]
Centrifuges, self-driven centrifuges,Centrifugal separator using a stack of conical membersThis morphological development is discussed with respect to the prior art in US Pat. No. 5,637,217 issued to Herman et al. On June 10, 1997. The invention disclosed in Herman U.S. Pat. No. 5,637,217 includes a bypass circuit centrifuge for separating particulates from circulating liquid. The centrifuge includes a hollow and generally cylindrical centrifuge bowl that is placed in combination with a base plate to define a liquid flow chamber. A hollow central tube extends upward through the base plate and extends axially within the hollow interior of the centrifuge bowl. The bypass circuit centrifuge is designed to be assembled in a cover assembly. Using a pair of oppositely arranged base plate tangential flow nozzles, the centrifuge is rotated within the cover to separate particulates from the liquid. Inside the centrifuge bowl, there are severalFrustoconical memberIs provided. theseConical memberAre arranged in a stacked array and are arranged at small intervals to increase separation efficiency. The incoming liquid stream exits the central tube through a pair of fluids (this fluid is typically oil) and from thereConical memberOriented in a stacked array. In one embodiment, in conjunction with ribs provided on the inner surface of the centrifuge bowl, a top plate accelerates this flow and directs it to the upper portion of the stacked array. In another embodiment of the invention of US Pat. No. 5,637,217, the stacked array is made disposable.AssemblyAs a part of. In each example, adjacentConical memberAs the flow passes through the channels formed in between, particle separation occurs. This is because the liquid continues to flow downward into the tangential flow nozzle.
[0003]
This conventional patent includes a disposableAssemblyIs disclosed, but thisAssemblyIsOuter shell on top of rotorThat is, a means called a permanent centrifuge bowl 197 in US Pat. No. 5,637,217 is also available.Outer shell on the bottom side of the rotorThat is, it does not include the means called base 198 in US Pat. No. 5,637,217. Therefore,AssemblyTo actually dispose of 186 (U.S. Pat. No. 5,637,217 with this reference number)AssemblyTheRotor outer shellMust be disassembled from within. In contrast, in the present invention,Assembly of stacked conical membersThe whole, the upper support, the hub,Rotor outer shellAre all integrated into a single disposable unit.
[0004]
Early products based on US Pat. No. 5,637,217 are made of non-disposable metalRotor assemblyAnd disposable insideOf conical stacks ofI was using capsules. Although these early products are high performance and have low life cycle costs for the end user, there is room for improvement and the present invention is directed to this improvement. The following items are included in the room for improvement that the present invention has solved. 1. Aluminum die cast rotor, machined steel hub, indented journal bearing, two nozzle jets formed by machining,Assembly of stacked conical membersIn other words, capsules and steel made by deep drawingRotor outer shellCentrifuging, including O-ring seals, and large “nuts” formed by machining to hold all of theseRotor assemblyIncluding high initial costs. This design is best suited for large engines with displacements of 19 liters or more, where the initial cost of the centrifuge (and the engine) is not as important as the life cycle cost. In addition, because of the large rotor and the low production volume of these engines, metal components and corresponding manufacturing processes are used. 2. If maintenance is difficult and time consuming
thing I said.Of a stack of conical membersIn order to remove the capsule, the centrifuge rotor must be disassembled. this is,Assembly of stacked conical membersAnd it is a relatively dirty job despite the inclusion of accumulated sludge. In the disposable rotor design, the entire rotor is lifted off the shaft, discarded, and re-centrifugedRotor assemblyJust exchange it.
[0005]
The disposable centrifuge rotor design of the present invention comprises a rotorAssemblyBy reducing the initial cost of the machine by about 75% (by reducing $ 25 by $ 6 for relatively large rotors of conventional design) and by allowing work to be done quickly and without getting dirty Provide the necessary improvements to the problems listed above. Most of the disclosures of the invention described herein are intended to increase separation efficiency.Assembly of stacked conical membersHowever, a low cost embodiment is also disclosed.
[0006]
Of the present inventionRotor outer shellMolded plastic and plastic welding design,Assembly of stacked conical membersIn combination with the all-metal design, the separation performance is improved. Furthermore, the present invention provides an incinerator product. This is important in the European market. Of the present inventionRotor outer shellFurthermore, the integration provided by molding provides a design improvement by reducing the number of parts compared to a metal stamping design. The present invention is mainly used for a lubrication system of a diesel engine having a displacement of 19 liters or less. The present invention can also be applied to hydraulic systems for industrial applications such as mechanical fluid purification, or any pressurized liquid system where a high capacity and high efficiency bypass separator is desired.
[0007]
[Problems to be solved by the invention]
One object of the present invention is an improved self-driven centrifuge.Rotor assemblyIs to provide.
[0008]
[Means for Solving the Problems]
Disposable self-driven centrifuge for separating unwanted components from circulating fluid according to one embodiment of the present inventionRotor assemblyIsThe first part of the outer shell of the rotorAnd to define the hollow interiorThe first part of the outer shell of the rotorJoined toRotor The second part of the outer shellWhen,The second part of the outer shell of the rotorA support hub positioned within the hollow interior adjacent toThe first part of the outer shell of the rotorPositioned in the hollow interior adjacent toSpool for support and alignmentAnd adjacentConical memberA plurality of individual arrangements arranged in a matched stack, with a flow spacing in betweenConical memberincluding,Assembly of stacked conical membersAnd have.Assembly of stacked conical membersWith a support hubSpool for support and alignmentIs positioned in the hollow interior.
[0009]
Related objects and advantages of the present invention will become apparent from the following description.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the accompanying drawings and specific language will be used to describe the same. Nonetheless, this is not intended to limit the scope of the present invention, and variations and modifications of the illustrated apparatus and other applications of the inventive principles illustrated herein may be found in the fields to which the present invention pertains. It will be understood that those of ordinary skill in the art can readily conceive.
[0011]
Referring to FIGS. 1, 2, 3 and 4, these figures show a disposable self-driven type.Assembly of stacked conical members20 is shown. This assembly isAssembly of stacked conical members21 is included in the number as one component and includes five plastic injection molded components. The remaining components includeOuter shell on top of rotor22,Outer shell on the bottom side of the rotor23,Spool for top side support and alignment24 and a hub 25 are included.Outer shell on top of rotor22 andOuter shell on the bottom side of the rotor23 are joined together by “EMA bond” welding at the annular lower edge 26 of the shell 22 and the annular upper edge 27 of the shell 23 to form an integral shell. EMA Bond materials and technology are provided by Ashland Chemical's EMA Bond System at Walnut Street 49, Norwood, NJ.
[0012]
FIG.Assembly of stacked conical membersThe present invention without 21 is shown. All other components are virtually identical, but simply individualConical member71 is removed, forming the low cost aspect of the present invention. The embodiment of FIG. 3 functions in the same way as described for the embodiments of FIGS. 1, 2, 3, and 4 with respect to the remaining components. The only difference isAssembly of stacked conical members21 does not exist. Of FIG.Outer shell on top of rotor22,Outer shell on the bottom side of the rotor23,Spool for top side support and alignment24 and hub 25 are held in the same manner as the corresponding components in FIGS. 1, 2, 3 and 4 so that twoRotor outer shellBefore welding each otherAssembly of stacked conical membersCan be added arbitrarily or can be omitted.
[0013]
Outer shell on top of rotor22 is shown in FIG. 5, FIG. 6, and FIG. thisOuter shell on top of rotorIsOuter shell on the bottom side of the rotorWhen a predetermined range of internal pressure existing when welding to 23 is handled, it is constructed and configured to provide a sludge containing vessel suitable for this handling.Outer shell part on top of rotor22 comprises six integral accelerating vanes 31 arranged at equal intervals, and these vanesConical memberA radial flow channel for directing liquid to the inlet hole positioned at The vane is integrally formed with the inner surface of the outer wall 32.
[0014]
Six vanes 31 add acceleration to the liquid, thereby rotating the centrifugeRotor assembly20 is used to prevent the liquid from “slipping”. Each of the vanes 31 includes an axial edge 33 that follows an edge 34 that extends radially outward at approximately 45 °. The set of six 45 ° vane edges isAssembly of stacked conical membersMade and configured to properly engage the top surface of 21. The outer wall 32 defines a cylindrical sleeve 35 that defines a cylindrical opening 35 a concentric with the circular lower edge 26. The lower edge portion 26 and the upper edge portion 27 are configured to cooperate in the relationship of “scallops (tongue member and groove)” in order to inductively weld two corresponding shell portions to each other.Outer shell part on top of rotor22 provides the tongue portion and the bottom shell 23 provides the groove portion. Although the preferred welding technique uses a technique known as EMA bond (EMA Bond is a registered trademark), other weld-joint techniques are contemplated. For example, two shell parts are joined together by spin welding or ultrasonic welding,Assembly of stacked conical membersIt can be an integral shell that houses 21.
[0015]
Outer shell on the bottom side of the rotor23 is shown in FIGS. 8, 9, 10, 11A, and 11B.Outer shell on the bottom side of the rotor23 isOuter shell on top of rotorIs constructed and configured to provide a sludge containment vessel suitable for handling a range of internal pressures present when welding to 22. The lower portion 37 of the bottom shell 23 is provided with integrally formed nozzle jets 38 and 39 having an oversized “relief” region 23a for maximizing jet velocity (and rotor angular velocity). The cylindrical hollow sleeve 42 is concentric with the annular upper edge 27 and is located at the center of symmetry between the nozzle jets 38 and 39. The sleeve 42 includes a short extension 42a that extends beyond the surface that the relief region 23a defines. The sleeve 42 further includesOuter shell on the bottom side of the rotor23 includes a relatively long extension 42b extending into the hollow interior. Once the two rotor parts are welded together, the sleeve 42 is concentric with the opening 35a.
[0016]
The annular ring-shaped inner wall 40 provides a mating engagement surface for the outer diameter of the annular wall 41 of the hub 25 (see FIGS. 12-15). Walls 40 and 41 nest and fit together concentrically to form a sealed interface;Conical stackThe liquid flow that circumvents the flow is extinguished. The sealing interface can be formed either by an interference fit between the plastic walls 40 and 41 or by welding the walls together. The upper edge 27 is configured to include a receiving groove 27a that provides a cooperating portion of the “sedge” connection with the lower edge 26.
[0017]
Outer shell on the bottom side of the rotor23 is provided with a spiral “V” shaped ramp 44 shaped as part of the lower surface 45. This ramp 44 guides the liquid flow smoothly toward the two nozzle jets 38 and 39, minimizes the drag force acting on the outside of the rotor by air and splashes (or sprays), and is a robust structural feature that withstands fluid pressure. I will provide a.
[0018]
The hub 25 is shown in FIGS. 12, 13, 14, and 15. FIG. The hub is formed with a conical base 48 and an integral tube 49. The tube 49 is conical so that the cylindrical first tube portion 50 extends outwardly from one side of the base 48 and the cylindrical second tube portion 51 extends from the opposite side of the base 48. Extending through the base. An annular vertical wall 41 is disposed on the outermost edge 52 of the base 48. As shown in FIG.
The rib 42 is fitted.
[0019]
The first tube portion 50 has a substantially cylindrical shape,Assembly of stacked conical membersIt extends in the axial direction upward in the center of 21. The outer diameter surface 50a of the first tube portion 50 is provided with two radial protrusions 53 and 54 extending in the axial direction, and these protrusions areAssembly of stacked conical membersEachConical memberActs as an alignment key that fits into the inner notch of the.
[0020]
The upper surface or upper edge of each protrusion 53 and 54 is provided with a concave (recessed) notch 58,Spool for support and alignmentIt fits into a cooperating protrusion provided on the tip of each 24 finger.Spool for support and alignmentReference numeral 24 is shown in FIGS. 18 to 21, which will be described below. As explained above, the spool 24 is composed of six pieces arranged at equal intervals.Hanging fingerA convex protrusion is provided at the tip of each of these fingers. The size and shape of each convex protrusion is compatible with each notch 58 (two are provided 180 degrees apart), and any two protrusions 180 degrees apart are two It is configured to fit downward into the (recessed) notch 58. This mutual fitting isSpool for support and alignmentIt is designed to form an intermeshing relationship between 24 and hub 25. In addition, thisConical memberDue to problems with stacking with tolerancesConical stackEven if it is "loose"Assembly of stacked conical members21 is aligned properly in the tangential direction.
[0021]
The inner diameter surface 59 of the second tube portion 51 provides a rotating journal bearing surface for the shaft of the centrifuge. As will be appreciated, the second tube portion 51 is substantially cylindrical. One aspect for this part of the design is to use this inner diameter surface to accept the metal bush. When this mode is selected, the diameter can be expanded to an appropriate size by reamer processing. However, an all-plastic structure is preferred in order to be able to incinerate the entire assembly for the European market.
[0022]
The conical base (ie skirt) 48 of the hub 25 isAssembly of stacked conical membersProviding an axial support surface forAssembly of stacked conical membersAn outlet hole 60 for the outflow from 21 is formed at the time of molding. eachConical memberIs
It has an inner diameter edge provided with six recessed notches arranged in a space. Using two of the six notches spaced 180 ° apart, eachConical memberAre aligned on the first two portions 50, the remaining four notches provide an available flow path. The outlet holes 60 are arranged in a circular pattern (16 in total) arranged at equal intervals,Notch on the conical memberIs placed underneath.
[0023]
The underside of the conical base 48 is reinforced by sixteen radial webs 61 that are equally spaced and located between each pair of adjacent outlet holes 60. As shown in FIG. 14, each web 61 is disposed at the center between two corresponding outlet holes 60. Each web and each web as an integral part of the conical base, and the overall curvature, geometry and shape of the integral structure are shown in FIG. The radial web 61 provided on the underside of the base 48 is “high temperature environment” during continuous operation.Conical memberHelps reduce the long term creep of base 48 due to pressure gradients that occur between the "side" and the rotor base side of the conical surface.
[0024]
As shown in FIG. 12, the second tube portion 51 includes an offset ledge or shoulder 62 that reduces the inner and outer diameters of the second tube portion. Effectively, this shoulder 62 means that the second tube portion has a first major section 65 and a second minor section 66. The web is formed to be integrally joined to both sections 65 and 66 and the shoulder 62. At the opposite end, the outer portion of each web is integral with the inner surface 67 of the conical base 48. The upper surface of the base 48 integral with the first tube portion 50 and the second tube portion 51 actually defines a separation line between the first tube portion 50 and the second tube portion 51.
[0025]
Referring to FIG. 16, FIG. 17, and FIG.Assembly of stacked conical membersMake up individualConical memberOne of 71 is shown. In a preferred embodiment,Assembly of stacked conical membersA total of 28 pieces to form 21Conical member71 are aligned and stacked on each other. However,Assembly of stacked conical membersAbout any number ofConical memberIt is possible to useConical memberIs determined by the size of the centrifuge, the type of fluid, and the desired separation efficiency. eachConical member71 is described and exemplified in US Pat. No. 5,637,217, issued to Herman et al. On June 10, 1997.Conical memberAnd made and constructed in a substantially similar manner.
[0026]
eachConical member71 is a frustoconical thin wall including a frustoconical main body 72, an upper shelf 73, and six vanes 74 formed on the inner surfaces of the main body 72 and the shelf 73 and arranged at equal intervals. It is a plastic member. eachConical memberThe outer surface 75 of 71 is substantially smooth throughout, but is adjacent to the inner surface 76.Conical memberBetween 71IntervalIn addition to the six vanes 74, a plurality of protrusions 77 are provided to help maintain the accuracy and uniformity of the above. In the main body 72, six openings 78 arranged at equal intervals are arranged.Assembly of stacked conical members21 adjacentConical memberAn inflow path for flowing oil between 71 is provided. Each opening 78 is positioned adjacent to a different corresponding one of the six vanes 74.
[0027]
eachConical memberA concentric hole 82 is defined in the center of the upper shelf 73 of the 71, and six V-shaped grooves 83 arranged at equal intervals aligned with the six vanes 74 in the circumferential direction define the holes 82. Surrounding in a direction extending in the radial direction. OneConical memberAdjacent groove 83Conical memberAccept the upper part of the vane,Assembly of stacked conical membersAll 21Conical memberFor 71, proper circumferential alignment is controlled. The hole 82 has a generally circular edge 84, which is deformed by six partial circular enlarged openings 85. The openings 85 are arranged at equal intervals, and are positioned at the center (circumferential direction) between the adjacent vanes 74. The edge portion 86 disposed between adjacent openings 85 is a portion of the same partial circular edge having a snugly sized diameter to match the outer diameter of the first tube portion 50. Since the edge portion 86 fits into the first tube portion 50 and is enlarged at the opening 85, it means that the oil outflow through the hole 82 is restricted from flowing through the opening 85. .Assembly of stacked conical membersThe spilled oil flow from 21 is thus arranged in six equally spaced channels along the outer diameter of the first tube portion 50.
[0028]
Each vane 74 is formed of two portions 89 and 90. The side portion 89 has a uniform thickness and extends downward from the rounded corner 91 along the inner surface of the body 72 to the annular edge 92. Each upper portion 90 of each vane 74 sits on a corresponding V-shaped groove 83 located on the lower side and centered in the circumferential direction. Portion 90 adjacentConical memberIt functions as a rib that enters the corresponding V-shaped groove 83 provided in 71. With this feature that the groove and the rib mesh,Assembly of stacked conical members21 can be quickly aligned.Conical member71 is assembled and aligned,Assembly of stacked conical members21 is preferably selected first on a mandrel or similar tubular object that does not have any “key” features.Conical memberThis is done by stacking 71 together. On this separate mandrelConical member71, the upper vane portion 90 is fitted into the V-shaped groove 83 toConical memberUntil is notched in placeThe mostIs also onConical memberThis is done simply by rotating 71. OnceAssembly of stacked conical membersAfter the entire 21 is assembled and aligned in this way, from the mandrelAssemblyRemoved and placed on the hub 25. In this way, the radial protrusions 53 and 54 that act as alignment keys areAssembly of stacked conical membersEach of 21Conical memberAlign with the inner diameter notch.
[0029]
Spool for support and alignment24 is shown in FIG. 19, FIG. 20, FIG. 21, and FIG. This spool is a disposable centrifuge on a centrifuge shaftRotor assemblyMade and configured to rotate 20. This is actually the inner diameter 95 of the upper tube portion 96 with a cylindrical configuration and is concentric with the body portion 97 which includes a substantially cylindrical outer wall 98. It is also conceivable that a metal bush can be pushed into the inner diameter 95 of the portion 96 to provide a journal bearing surface. Depending on the size of the selected metal bush, the inner diameter 95 needs to be reamered to an appropriate size for press fitting. However, metal bushes are not used to allow the entire assembly to be incinerated, and thus the preferred embodiment is an all-plastic construction. As shown in FIG. 1 to FIG.Outer shell on top of rotor22 is incorporated. Specifically, the upper tube portion 96 fits into the cylindrical opening 35.
[0030]
In the region of the main body portion 97 between the cylindrical outer wall 98 and the inner diameter 95, eight radial ribs 99 arranged at equal intervals and integrally formed are provided. Between each pair of adjacent, radial ribs 99, a flow opening 100 is disposed. A total of eight flow openings 100 are provided that are equally spaced. The radial rib 99 abuts the annular lower edge of the sleeve 35 and the flow opening 100 is in flow communication with the interior of the hub 25 and, in particular, the first and second tube portions 50 and 51. doing. With spool 24Outer shell on top of rotorThe abutting engagement between the 22 and the aperture 100 cooperates with the centrifugal separation from the hub.Rotor assemblyForm a radial flow path into the 20 acceleration vane regions. By inserting the upper tube portion 96 into the opening 35a,Assembly of stacked conical membersConcentric with 21.
[0031]
Six integrally formed fingers 101 arranged at equal intervals extend from the lower edge of the outer wall 98 in the direction away from the tube portion 96 in the axial direction. At the tip (lower) edge 102 of each finger 101 is provided a convex protrusion 103 configured to fit within a concave (depressed) notch 58 of each protrusion 53 and 54.
[0032]
In addition, each finger 101 has a shape and geometry corresponding to the flow opening 85 located at the circular edge 84 of the hole 82. FingerAssembly of stacked conical membersOn top of 21Conical member71 into the flow opening 85 of 71,Top conical memberThe flow opening 85 is closed in a closed state. By closing and closing these flow openings, the preferred embodiment design is:Assembly of stacked conical membersTo prevent total flow bypass. The inner surface of each finger 101 engages with the outer diameter of the first tube portion 50, thereby causing the hub 25 to move.Outer shell on top of rotor22 and properly concentrically aligned.
[0033]
The molded fingers areTop conical memberNot only manyConical memberSince it extends through 71, a small groove 106 is formed in the radially outer surface of each finger. These grooves 106 allow these otherConical memberA flow through can be created. If there is no groove 106, “engaged”Conical memberProvides an end without exit for the flow,Conical memberWill be of no value for separation work.
[0034]
DisposableRotor assembly20 manufacturing and assembly, individualConical memberExplained and illustrated starting with 71 injection molding. Used in the present invention as described aboveConical memberEach style of 71 is detailed in US Pat. No. 5,637,217.Conical memberIt is practically the same as the style. As explained above,Conical memberThis style is self-aligned and adjacentConical memberDesigned to automatically form the proper axial spacing between them. By fitting the V-shaped groove and V-shaped rib,Conical memberUntil “click” in place (click in)Top conical memberJust rotateConical memberCan be stacked on top of each other.
[0035]
Due to the all-plastic construction of the preferred embodiment of the present invention, the assembly 20 is prone to fouling and does not require complex disassembly and can be disposed of by disposal without the need to exclude or recover any metal parts. Can also be incinerated.
[0036]
While the invention has been illustrated and described in detail in conjunction with the accompanying drawings and the foregoing description, it is to be understood that the invention has been shown and described by way of example only and not by way of limitation. It should be understood that all variations and modifications within the spirit of the invention are to be protected.
[Brief description of the drawings]
FIG. 1 shows a disposable self-driven type according to an exemplary embodiment of the present invention.Rotor assemblyFIG.
2 is a diagram of FIG.Rotor assemblyIt is front sectional drawing in the 1st cutting plane of the whole.
FIG. 3 shows a modified example according to the present invention.Rotor assemblyIt is front sectional drawing of the whole.
4 is a diagram of FIG.Rotor assemblyIt is front sectional drawing in the 2nd cutting plane of the whole.
5 is a diagram of FIG.Rotor assemblyConfigure one componentOuter shell part on top of rotorFIG.
6 is a view of FIG.Outer shell part on top of rotorFIG.
7 is a diagram of FIG.Outer shell part on top of rotorFIG. 6 is a front sectional view taken along line 6-6 of FIG.
8 is a diagram of FIG.Rotor assemblyConfigure one componentOuter shell part on the bottom side of the rotorFIG.
FIG. 9 is the same as FIG.Outer shell part on the bottom side of the rotorFIG.
10 is the same as FIG.Outer shell part on the bottom side of the rotorFIG.
11A is a view of FIG. 8 taken along line 10-10 of FIG.The bottom side of the rotor Outer shell partFIG. 11B is a front sectional view of the whole of FIG.Outer shell part on the bottom side of the rotorIt is front sectional drawing of the whole.
FIG. 12 is a diagram of FIG.Rotor assemblyIt is a perspective view of the hub which comprises one component.
13 is a front view of the hub of FIG. 12. FIG.
14 is a plan view of the hub of FIG. 12. FIG.
15 is a bottom view of the hub of FIG. 12. FIG.
FIG. 16 is a diagram of FIG.Rotor assemblyConfigure one componentAssembly of stacked conical membersThe parts ofConical memberFIG.
17 is the same as FIG.Conical memberFIG.
18 is a view of FIG. 16 taken along line 17-17 of FIG.Conical memberIt is front sectional drawing of the whole.
FIG. 19 is a diagram of FIG.Rotor assemblyConfigure one componentSpool for support and alignmentFIG.
20 is the same as FIG.Spool for support and alignmentFIG.
21 is the same as FIG.Spool for support and alignmentFIG.
22 is the same as FIG.Spool for support and alignmentIt is a front view of the whole.
[Explanation of symbols]
20Rotor assembly
21Assembly of stacked conical members
22Outer shell part on top of rotor  23Outer shell part on the bottom side of the rotor
24Spool for top side support and alignment  25 Hub
26 annular lower edge 27 annular upper edge
31 Acceleration vane 71Conical member

Claims (23)

In a rotor assembly for a disposable self-driven centrifuge for separating unwanted components from the circulating fluid,
A first portion of the outer shell of the rotor ;
A second portion of the outer shell of the rotor joined to a first portion of the outer shell of the rotor to define a hollow interior;
A support hub incorporated into the second portion of the outer shell of the rotor and extending into the hollow interior;
A spool for support and alignment incorporated in a first portion of the outer shell of the rotor and extending into the hollow interior;
An assembly of conical members stacked , wherein the conical member stack is a plurality of independent cones arranged to form an aligned stack having a flow spacing between adjacent conical members. include Jo member, assembly stacked the conical member, the hollow interior is positioned, are assembled so as to cooperate between the spool for the bearing and aligned with said supporting hub, the An assembly of stacked conical members ;
A rotor assembly for a disposable self-driven centrifuge. The rotor assembly for a disposable self-driven centrifuge according to claim 1, wherein the first and second portions of the outer shell portion of the rotor are formed by injection molding of a plastic material. The rotor assembly for a disposable self-driven centrifuge according to claim 2, wherein the first and second portions of the outer shell of the rotor are welded together and integrated together. A first portion of the outer shell portion of the rotor defines a substantially cylindrical opening, and the bearing and alignment spool is fitted over the substantially cylindrical opening. The rotor assembly for a disposable self-driven centrifuge according to claim 3, comprising a tube portion. The second portion of the outer shell of the rotor defines a substantially cylindrical sleeve, and the support hub includes a substantially cylindrical tube portion that fits over the substantially cylindrical sleeve. A rotor assembly for a disposable self-driven centrifuge according to claim 4 comprising: 6. The rotor assembly for a disposable self-driven centrifuge according to claim 5, wherein the substantially cylindrical opening is substantially concentric with the substantially cylindrical sleeve. 7. A rotor assembly for a disposable self-driven centrifuge according to claim 6, wherein each conical member of the assembly of stacked conical members defines a corresponding central hole. 8. The rotor of a disposable self-driven centrifuge according to claim 7, wherein the support hub includes a tube portion that extends through a central hole in each conical member of the stack of conical members . Assembly . The rotor assembly for a disposable self-driven centrifuge according to claim 1, wherein the first and second portions of the outer shell of the rotor are welded together to form an integral combination. The first portion of the outer shell of the rotor defines a substantially cylindrical opening, and the spool for support and alignment is an upper tube that fits into the substantially cylindrical opening. The rotor assembly for a disposable self-driven centrifuge of claim 1, comprising a portion. The second portion of the outer shell of the rotor defines a substantially cylindrical sleeve, and the support hub includes a substantially cylindrical tube portion that fits over the substantially cylindrical sleeve. 11. A rotor assembly for a disposable self-driven centrifuge according to claim 10, comprising: The rotor assembly for a disposable self-driven centrifuge according to claim 1, wherein each conical member of the stack of conical members defines a corresponding central hole. The rotor of a disposable self-driven centrifuge according to claim 12, wherein the support hub includes a tube portion extending through a central hole in each conical member of the stack of conical members . Assembly . A first portion of the outer shell portion of the rotor, a second portion of the outer shell portion of the rotor , the support hub, the spool for support and alignment , and the individual conical shapes of the assembly of conical members stacked together; The rotor assembly for a disposable self-driven centrifuge according to claim 1, wherein each member is injection molded from a plastic material. In a disposable rotor assembly for a centrifuge for separating particulates from passing fluids,
An outer shell portion of the rotor having first and second shaft holes and made and configured to define a hollow interior;
A support hub positioned in the hollow interior and incorporated in the first shaft hole;
A bearing and alignment spool positioned within the hollow interior and incorporated into the second shaft bore;
A plurality of conical members , arranged in an axial stack having a substantially uniform axial space between adjacent conical members ;
The axial direction of the stack of the conical member is positioned within the hollow interior of the outer shell of the rotor, a plurality of conical members,
A disposable rotor assembly for a centrifuge, comprising: The disposable outer shell of claim 15, wherein the outer shell of the rotor, the support hub, the support and alignment spool, and the plurality of conical members are each injection molded from a plastic material . Rotor assembly . The disposable rotor assembly of claim 16, wherein each conical member of the stack of conical members defines a corresponding central hole. The disposable rotor assembly of claim 17, wherein the support hub includes a tube portion that extends through a central hole in each conical member of the stack of conical members . In a rotor assembly for a disposable self-driven centrifuge for separating unwanted components from a circulating fluid,
A first portion of the outer shell of the rotor ;
A second portion of the outer shell of the rotor joined to a first portion of the outer shell of the rotor and defining a hollow interior;
A support hub incorporated into the second portion of the outer shell of the rotor and extending into the hollow interior;
A spool for support and alignment incorporated in a first portion of the outer shell of the rotor and extending into the hollow interior;
A rotor assembly for a disposable self-driven centrifuge. 20. The assembly of a rotor for a disposable self-driven centrifuge according to claim 19, wherein the first and second portions of the outer shell of the rotor are welded together and combined together. The first portion of the outer shell of the rotor defines a substantially cylindrical opening, and the spool for support and alignment is an upper tube that fits into the substantially cylindrical opening. 21. The rotor assembly for a disposable self-driven centrifuge of claim 20, including a portion. The second portion of the outer shell of the rotor defines a substantially cylindrical sleeve, and the support hub includes a substantially cylindrical tube portion that fits over the substantially cylindrical sleeve. 22. A rotor assembly for a disposable self-driven centrifuge according to claim 21, comprising: 24. The rotor assembly for a disposable self-driven centrifuge of claim 22, wherein the substantially cylindrical opening is substantially concentric with the substantially cylindrical sleeve.

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