JP2017200692A - Centrifuge and insert and base elements for centrifuge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new type of centrifuge and an insert and base element for the centrifuge. An open jet centrifuge for cleaning lubricating oil of an internal combustion engine, in which a rotor 10 includes a radially inner rotor shaft 11, a radially outer rotor tube 12, a rotor shaft 11 and a rotor tube 12. And a centrifuge comprising an insert disposed between and having a deposition surface for contaminants. The insert includes a concentric tubular inner wall, a tubular outer wall, and a plurality of tubular intermediate walls that serve as a deposition surface, and the liquid to be cleaned flows axially from top to bottom in the insert, so that the base element at the bottom A centrifuge having a recess that is sized to pass through 22 and allow base element 22 to permeate the liquid but not the major majority of the sediment sediment. [Selection] Figure 1

Description

  The present invention relates to a centrifuge. The invention further relates to an insert and base element for a centrifuge.

  From Patent Document 1, a centrifuge for cleaning lubricating oil of an internal combustion engine, that is, an open jet centrifuge is known. An open jet centrifuge known in the prior art includes a housing and a rotor rotatably attached to the housing. The rotor includes a radially inner rotor shaft, a radially outer rotor tube, and a deposition surface for liquid contaminants to be cleaned disposed between the radially inner rotor shaft and the radially outer rotor tube. Insert. The liquid to be cleaned can be supplied to the insert with the deposition surface for the contaminants via the rotor shaft and at least one recess introduced into the rotor shaft. According to Patent Document 1, the deposition surface is oriented spirally with respect to the rotation axis of the rotor.

European Patent No. 1266804

  The centrifuges known in the prior art have only a limited separation performance of the contaminants. There is a demand for improved separation performance of centrifuges. A further problem with the centrifuges known in the prior art is that the sediment deposited, especially when the centrifuge insert needs to be replaced as a result of too much sediment sediment loaded therein. However, it may reach the direction of the base part or the direction of the outlet nozzle arranged in the region of the base part, resulting in clogging of the outlet nozzle. This also limits the separation performance of the centrifuge. In certain situations, if the nozzle becomes clogged too much, the centrifuge needs to perform a very costly cleaning process. Starting from this, the present invention is based on the task of creating a new kind of centrifuge and inserts and base elements for the centrifuge.

  This problem is solved by a centrifuge according to claim 1. According to the invention, the insert has a plurality of concentric walls, i.e. a tubular inner wall, a tubular outer wall, and a plurality of tubular intermediate walls, which have a radius between the inner and outer deposition surfaces. Connected by a web that extends in the direction. In addition, the rotor comprises a base element, the base element comprising a recess, the size of the recess being sized so that it can permeate liquid but not the major part of the sediment sediment. A minimal amount of small particles can pass through the recess. However, much more than 50% of the precipitate remains in the centrifuge.

  The configuration of the centrifuge insert according to the invention allows a particularly effective cleaning of the liquid to be cleaned and thus provides a high separation performance. The base element of the centrifuge also ensures improved separation performance because there is no risk of interfering sediment deposits reaching the area of the centrifuge outlet nozzle when replacing the insert. To do.

  According to a further advantageous development, the outer diameter of the outer wall of the insert corresponds to the inner diameter of the radially outer rotor cylinder, the inner diameter of the inner wall of the insert corresponds to the outer diameter of the radially inner rotor shaft, The web of the insert extends exclusively between the deposition surface of the inner wall directed radially outward and the deposition surface of the outer wall directed radially inward. As a result, the entire interior space of the centrifuge rotor, which is radially separated by the rotor shaft and the rotor cylinder, can be optimally filled by the insert, and as a result, a high separation performance can be provided.

  The settling chamber of the insert, i.e. the insert delimited by the concentric walls and the web, opens at the bottom, and the liquid to be cleaned flows from top to bottom without reversal of direction in the insert or settling chamber. This can also provide high separation performance.

  Preferably, the inner rotor shaft comprises at least one recess for the entrance of the liquid to be cleaned into the insert, the tubular inner wall being at the upper end, the tubular inner wall being the aforementioned or each recess. Without covering, it is dimensioned to open the inlet into the insert of the liquid to be cleaned, the tubular intermediate wall being dimensioned at the upper end in the same way as the tubular inner wall. This ensures that the liquid to be cleaned can reach all areas of the deposition surface without hindrance, and this can also provide high separation performance.

  Preferably, the base element is arranged at the lower end of the rotor cylinder and the insert, and the rotor cylinder and the insert stand flush on the base element by the lower end. This detail also helps to optimally fill the usable internal space of the rotor with the insert and thus provide high separation performance.

  Preferably, the base element is formed in a frustoconical outer shape, and the axial length of the intermediate wall gradually decreases in the axial length direction of the inner wall when viewed from the radially outer side to the radially inner side. As shown, the tubular inner wall of the insert and the tubular intermediate wall of the insert are gradually shortened axially with respect to the outer wall at their lower ends, and the insert in the area of each wall Stands flush with the end on the base element. This also improves the separation performance of the centrifuge.

  An insert for the centrifuge is defined in claim 13 and a base element for the centrifuge is defined in claim 15.

  Preferred further developments of the invention result from the dependent claims and the following description. Exemplary embodiments of the present invention will be described in more detail with reference to the drawings, but are not limited thereto.

It is a figure which shows the detail of the area | region of the rotor of a centrifuge with which insert was abbreviate | omitted. Figure 3 is a radial cross section through the insert of the centrifuge. It is sectional drawing of the axial direction which passes along the insert of a centrifuge. It is a perspective view of the insert seen from the bottom. It is the perspective view of the base element seen from the top. It is sectional drawing of the axial direction which passes along a base element.

  The present invention relates to a centrifuge, preferably designed as an open jet centrifuge, for cleaning the liquid to be cleaned, in particular for cleaning lubricating oils of internal combustion engines.

  Such an open jet centrifuge includes a casing (not shown) and a rotor 10 rotatably attached to the casing.

  The rotor 10 includes a radially inner rotor shaft 11 and a radially outer rotor tube 12, and the hollow space of the rotor 10 depends on the outer diameter of the radially inner rotor shaft 11 and the inner diameter of the radially outer rotor tube 12. Are separated in the radial direction.

  At least one hole or recess 13 is introduced into the rotor shaft 11, through which the liquid to be cleaned can be introduced into the hollow space between the rotor shaft 11 and the rotor cylinder 12. Below the rotor cylinder 12 is arranged a base structure 14 comprising at least one outlet nozzle 15 for the cleaned liquid.

  In the free space of the centrifuge rotor 10 defined by the rotor shaft 11 and the rotor cylinder 12, an insert 16 not shown in FIG. 1 but depicted in FIGS. A deposition surface 17 for contaminants is provided. The liquid to be cleaned flows in the insert 16 in the axial direction.

  The insert 16 comprises a plurality of concentric walls: a tubular inner wall 18, a tubular outer wall 19, and a plurality of tubular intermediate walls 20 disposed between the radially inner wall 18 and the radially outer wall 19. . All the walls 18, 19 and 20 of the insert 16 in this case are arranged concentrically with respect to each other and these walls 18, 19 and 20 are connected to each other by a radially extending web 21. . The deposition surface 17 for the contaminants in this case is provided by both concentric walls 18, 19 and 20 and the web 21.

  The concentric walls 18, 19, 20 and the web 21 delimit the settling chamber of the insert 16, and the contaminant in the form of a deposit is deposited on the deposition surface 17 of the settling chamber. The insert 16 or its sedimentation chamber opens at the bottom, and the liquid flows exclusively from top to bottom in the insert 16 or sedimentation chamber without reversal of direction. This is advantageous because of the optimum residence time of the liquid to be washed and thus high separation performance.

  As is most apparent from FIG. 2, the walls 18, 19, and 20 of the insert 16 that are concentric with each other and provide the deposition surface 17 are not evenly spaced from each other in the radial direction. This radial distance between the concentric walls 18, 19 and 20 is different from one another, and therefore the radial distance varies when viewed from the radially inner side to the radially outer side.

  The outer diameter of the radially outer wall 19 of the insert 16 matches or corresponds to the inner diameter of the radially outer rotor cylinder 12. Further, the inner diameter of the radially inner side wall 18 of the insert 16 corresponds to the outer diameter of the radially inner rotor shaft 11. The web 21 which serves to connect the concentric walls 18, 19 and 20 is exclusively between the deposition surface of the inner wall 18 of the insert 16 facing outward and the deposition surface of the outer wall 19 facing radially inward. It extends in the radial direction. The web 21 therefore does not protrude radially inward with respect to the inner wall 18 of the insert 16 and does not protrude radially outward with respect to the outer wall 19. The hollow space of the rotor 10 of the open jet centrifuge defined radially by the rotor shaft 11 and the rotor cylinder 12 is optimally filled by the insert 16.

  Preferably, the axial length of the insert 16 corresponds to the inner height of the rotor cylinder 10. As already explained, the inner rotor shaft 11 is provided with the aforementioned or each recess 13, through which the liquid to be cleaned can be sent in the direction of the insert 16. The tubular inner wall 18 of the insert 16 in this case is dimensioned so that, at its upper end, the inner wall 18 of the insert 16 opens it without covering the recess 13 and is washed in the direction of the insert 16. Inflow of the liquid to be performed is possible without interruption.

  Furthermore, the intermediate walls 21 of the inserts 16 are also configured in the same way, i.e. at their upper end they should be cleaned without covering the aforementioned or each recess 13 of the rotor shaft 11 as seen in the projection. All the chambers of the insert 16 in which the liquid can reach the area of all the deposition surfaces, i.e. defined by the concentric walls 18, 19 and 20 and the web 21 and in which the liquid to be cleaned should flow. Is dimensioned to reach

  The radially outer wall 19 of the insert 16 can be elongated at its upper end (see FIG. 3) compared to the walls 18, 20, so that the liquid to be cleaned can be removed from the radially outer rotor cylinder 12. Reaching the radially inner wall is prevented.

  In order to prevent sediment or accumulated contaminants from reaching the area of the outlet nozzle 15 during the replacement of the insert 16, the centrifuge according to the invention comprises a base element 22 in addition to the insert 16, The base element 22 comprises a recess 23 (see FIG. 5), the size of the recess 23 being dimensioned so that it can penetrate the washed liquid but not the major part of the sediment sediment. ing.

  The recess may be embodied as a hole having a diameter of about 0.1 millimeter to 10 millimeters, for example. Here, the diameter of the holes in the base element may actually differ. In particular, in the field of large-scale diesel engines, for example for ships, the particle size of the precipitate can be considerably larger than the particle size in the case of conventional passenger car diesel engines.

  Therefore, much sediment cannot pass through the recess 23 of the base element 22 and does not reach the region of the outlet nozzle 15 and clog it.

  As shown in particular in FIGS. 5 and 6, the base element 22, which can be embodied as a perforated plate, preferably has a frustoconical profile that tapers upward from the bottom like a truncated cone. Can have. The radially outer rotor cylinder 12 of the rotor 10 rises flush on the base element 22, ie the radially outer part of the base element 22, by the lower end. The walls 18, 19 and 20 of the insert 16 match the frustoconical profile of the base element 22, and at their lower ends, ie all the walls 18, 19 and 20 of the insert 16 are on the base element 22. The outer shape is formed so as to stand flush with each other.

  For this reason, the walls 18, 19 and 20 gradually shorten from the radially outer side to the radially inner side, and therefore when viewed from the radially outer side to the radially inner side, especially in the axial direction of the intermediate wall 20. The length gradually decreases in the direction of the inner wall 18. This allows the inserts 16 in the respective regions of the walls 18, 19 and 20 to stand flush on the base element 22.

  The base element 22 may be a mesh-like structure that is permeable to liquids but impermeable to the major part of the sediment sediment.

  The centrifuge according to the present invention has high separation performance. The liquid to be cleaned can reach the deposition surface 17 provided by the insert 16 without any obstruction. The base element 22 prevents most of the contaminated liquid from flowing into the outlet nozzle 15 and thus prevents the outlet nozzle 15 from becoming clogged when the insert 16 is replaced.

  Various materials can be utilized for the insert 16 and base element 22, for example, metallic materials or plastics.

  Furthermore, the present invention also relates to the insert 16 and the base element 22 itself so as to thereby allow modification of existing centrifuges. For the characteristic configuration of the insert 16 and the base element 22, reference is made to the above description.

DESCRIPTION OF SYMBOLS 10 Rotor 11 Rotor shaft 12 Rotor cylinder 13 Recess 14 Base structure 15 Outlet nozzle 16 Insert 17 Deposition surface 18 Tubular inner wall 19 Tubular outer wall 20 Tubular intermediate wall 21 Web 22 Base element 23 Recess

Claims (16)

A centrifuge with a rotor (10) for cleaning the liquid to be cleaned, in particular an open jet centrifuge for cleaning lubricating oil of an internal combustion engine, said rotor (10) being radially An inner rotor shaft (11), a radially outer rotor tube (12), and a deposition surface (17) for contaminants disposed between the rotor shaft (11) and the rotor tube (12); A centrifuge comprising an insert (16), wherein the liquid to be cleaned can flow axially in the insert (16),
The insert (16) comprises a plurality of concentric walls (18, 19, 20), namely a tubular inner wall (18), a tubular outer wall (19) and a plurality of tubular intermediate walls (20). Are connected by a radially extending web (21),
The rotor is subsequently provided with a base element (22), the base element (22) is provided with a recess (23), the size of the recess (23) being permeable to the liquid, but with the sedimentation of the contaminants. A centrifuge characterized in that it is dimensioned so that it cannot penetrate the major part of the object.   The insert (16), ie the sediment chamber of the insert (16) delimited by the concentric walls (18, 19, 20) and the web (21) opens at the bottom, and the insert (16) or the The centrifuge according to claim 1, wherein the liquid flows in the sediment chamber from top to bottom without reversing the direction.   The outer diameter of the outer wall (19) of the insert (16) corresponds to the inner diameter of the radially outer rotor cylinder (12), and the inner diameter of the inner wall (18) of the insert (16) is Centrifuge according to claim 1 or 2, characterized in that it corresponds to the outer diameter of the radially inner rotor shaft (11).   The web (21) of the insert (16) is between the deposition surface of the inner wall (18) oriented radially outward and the deposition surface of the outer wall (19) oriented radially inward. The centrifuge according to any one of claims 1 to 3, characterized in that it extends exclusively.   The centrifuge according to any one of claims 1 to 4, characterized in that the axial length of the insert (16) corresponds to the inner height of the rotor cylinder (12).   The radial distance between the concentric walls (18, 19, 20) of the insert (16) varies from the radially inner side to the radially outer side, according to any one of the preceding claims. The centrifuge according to item.   The inner rotor shaft (11) comprises at least one recess (13) for the entrance of the liquid to be cleaned into the insert (16), the inner tubular wall (18) of the insert (16). ) At the upper end, the tubular inner wall (18) of the insert (16) does not cover the or each recess (13) of the inner rotor shaft (11), the liquid to be cleaned. Centrifuge according to any one of the preceding claims, characterized in that it is dimensioned to open the inlet into an insert (16).   The tubular intermediate wall (20) of the insert (16) is sized at the upper end thereof in the same manner as the tubular inner wall (18) of the insert (16). Item 8. The centrifuge according to item 7.   The base element (22) is disposed at a lower end portion of the outer rotor tube (12) and the insert (16), and the rotor tube (12) and the insert (16) are formed by the lower end portion. Centrifuge according to any one of the preceding claims, characterized in that it stands upright on the base element (22).   Centrifuge according to any one of the preceding claims, characterized in that the base element (22) is embodied as a perforated plate or as a woven structure.   Centrifuge according to any one of the preceding claims, characterized in that the base element (22) is formed in a frustoconical outer shape.   The insert so that the axial length of the intermediate wall (20) gradually decreases in the axial length direction of the inner wall (18) when viewed from the radially outer side to the radially inner side. The tubular inner wall (18) of (16) and the tubular intermediate wall (20) of the insert (16) are at their lower end relative to the outer wall (19) of the insert (16). Gradually shorter in the axial direction, the insert (16) in the region of each wall (18, 19, 20) stands upright on the base element (22) by its lower end. The centrifuge according to claim 11.   An insert (16) for a centrifuge for washing the liquid to be washed, comprising a plurality of concentric walls (18, 19, 20), ie a tubular inner wall (18) and a tubular outer wall (19 ) And a plurality of tubular intermediate walls (20), which are connected by a radially extending web (21).   14. Insert according to claim 13, further made according to any one of claims 2 to 8 or claim 12.   A base element (22) for a centrifuge for cleaning the liquid to be cleaned, comprising a recess (23), the size of the recess (23) being permeable to the liquid, Base element (22), characterized in that it is dimensioned so as not to penetrate the major part of the sediment.   Base element according to claim 15, characterized in that it is further created according to any one of claims 9 to 11.

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