KR20140047397A - Centrifugal separator for liquid filtration - Google Patents

Abstract

The present invention provides a centrifuge for liquid filtration for filtering impurities contained in oil by rotating at high speed with the pressure of oil circulated in a ship engine. The centrifugal separator 10 for the liquid filtration is formed such that the injection hole 42 formed in the sleeve 40 has an inclination angle in the direction of the inner surface 52 of the rotor cover 50 from the lower side of the rotor cover 50. The oil flowing into the rotor cavity 31 through the sleeve 40 through a simple configuration is configured to form a stable flow to the inner surface 52 of the rotor cover 50. In addition, the guiding ribs 54 formed on the rotor cover 50 form a tangent to the center hole 51 to which the sleeve 40 is coupled, thereby being shorter than a vortex-shaped rib converging to the center point, such as Mann Hummel. Since it has a relatively longer length than the rib formed in a straight line as in the prior art, it can be expected to effectively filter the impurities contained in the oil while maintaining the active ingredient of the oil.

Description

Centrifuge for liquid filtration {CENTRIFUGAL SEPARATOR FOR LIQUID FILTRATION}

The present invention relates to a centrifuge for liquid filtration, and more particularly to a centrifuge for liquid filtration for filtering foreign matter contained in the oil by rotating the rotor at high speed with the pressure of the circulating oil.

In the case of a ship equipped with a serial 12-cylinder diesel engine, 300 to 400 tons of fuel (heavy oil) is consumed during a day of cruising, and accordingly a large amount of engine oil is also used. In addition, stable engine oil circulation plays an important role in determining the life of the engine. For this reason, a centrifugal separator is used to filter foreign substances such as sludge and impurities contained in the oil by rotating the filter at high speed with the pressure of oil circulating.

Regarding the centrifugal separator for filtering liquids such as engine oil, lubricating oil and hydraulic oil, the centrifugal separator proposed by MANN + HUMMEL of Germany is widely used.

In this regard, Mann and Hummel used a centrifugal cleaner and a venturi device through which a portion of the circulating fluid diverges through a "fluid circulating centrifugal cleaning device and fluid circulation system" in Korean Patent Publication No. 10-0407191. Venturi has been proposed to include a significant pressure drop locally in the open area of the inlet connected to the scrubber holding tank so that the cleaned fluid is converted into a non-branching fluid and returned to circulation. .

In addition, Korean Patent Publication No. 10-0629536 "Free Classification Centrifuge" is provided with a ball bearing in the housing on one side of the rotor and is connected to the closed shaft journal of the rotor. The rotor is sealed so that friction in the ball bearing does not occur due to oil pressure in the centrifuge, and the slide bearing is proposed to be provided on the other side of the rotor which is a bearing bush and a slide bush.

In addition, Korean Patent Publication No. 10-0978345 "Slope nozzle attached centrifugal filter" is connected to each nozzle hole formed in the spindle tube to form a continuous flow path, the fluid is injected into the rotor is dispersed It is formed to be inclined upward so as to reach the paper provided on the inner wall surface of the rotor over a large area. In view of the reaction force of the proposed technique for a centrifugal filter further comprises a gradient nozzle having a plurality of guided injection holes to change.

FIG. 1 is a view for explaining a rotor cover mainly applied to a centrifugal separator of Mannheim, Germany.

Referring to FIG. 1, Mannheimer Company has proposed a technique in which a swept rib 204 is applied to a rotor cover 200 of a centrifugal separator. Such a swept rib 204 is formed in a vortex shape converging to a center point so that the dispersing path of the dispersed oil is formed to be long so that the centrifugal force is increased so as to increase the filtration degree of the oil.

However, such a structure of the rotor cover 200 is difficult to manufacture because the upper portion of the shaft and the sleeve has a complicated structure so that the oil flowing into the rotor flows into the rotor cover 200.

Unlike the technology of the centrifugal separator proposed by Mann and Hummel et al., Republic of Korea Patent Publication No. 10-0577663 "Rotator for centrifugal separator" is rotatable about a central axis, two end walls separated in the axial direction And a casing having a peripheral wall positioned therebetween and surrounding the central axis, an inlet member delimiting the inlet conduit to the center of the casing, separation means mounted to the casing, and located in at least one end wall region; A rotor for a centrifugal separator is proposed that is spaced from a central axis including an outlet member and delimits an outlet channel and is directed so that a reaction force can be applied to the rotor in the circumferential direction of the rotor as the fluid exits the channel. .

In addition, in Publication No. 10-2007-0043695 entitled "Impulse Centrifuge for Lubricating Oil Purification of Internal Combustion Engine ", the rotor is designed as two parts and has at one side a driving member having at least one reaction nozzle And the contaminant trapping member including a contaminant collecting region on the other side, the driving member being able to flow through the first lubricant portion flow and the contaminant trapping member to the second lubricant portion flow, and the driving member and the contaminant trapping member And these torque transmitting means are engaged by inserting the contaminant trapping member in the axial direction on the driving member or by axially pulling the contaminant trapping member from the driving member in the axial direction, And the contaminant trapping member can be used for disposal or cleaning And means that act to restrict or limit the axial mobility of the contaminant trapping member relative to the driving member during operation of the centrifuge and that may be lost or removed during disassembly of the cover A centrifugal separator is provided or mounted in a centrifuge.

Such a centrifuge allows the oil flowing through the shaft and the sleeve to be injected laterally from the lower side of the rotor cover, and proposes a rib formed in a straight shape unlike the swept rib applied to the rotor cover of the above-mentioned Mann Hummel centrifuge. Doing. Accordingly, such prior arts allow the configuration of the upper portion of the shaft and the sleeve to be relatively simple, and the rotor cover is filtered to the effective component of the oil by forming a relatively centrifugal force as compared with the rotor cover of Mann & Hummel. It was intended to improve the problem.

However, since the centrifugal separator according to the related art allows the injection of oil through the sleeve to be performed in the lateral direction, the residence time in the rotor is reduced, so that the amount of impurities collected is reduced, and the rotational speed of the rotor is reduced due to pressure loss. There is a problem, and there is a problem that the size of the centrifugal force in the rotor cover is too low to effectively filter the impurities mixed in the oil.

The present invention has been proposed to improve such a problem of the prior art, in the construction of a centrifuge for filtration of liquid, the oil flowing into the rotor cavity through the sleeve while simplifying the structure of the shaft and sleeve than the rotor cover It is an object of the present invention to provide a centrifugal separator for a new type of liquid filtration to form a stable flow to the inner surface of the.

In addition, the present invention exhibits a medium centrifugal force of the rotor cover of Mann and Hummel Inc. and the prior art to prevent the effective component of the oil is filtered, while a new type of liquid filtration to effectively remove impurities such as sludge or foreign matter incorporated into the oil. It is an object to provide a centrifuge for.

According to a feature of the present invention for achieving the above object, a centrifugal separator for liquid filtration for filtering impurities contained in the circulating oil, comprising: a shaft 20 to allow the inflow of the circulating oil; A sleeve (40) supported to rotate on the shaft (20) so that oil flowing through the shaft (20) flows into the rotor cavity (31); Rotor 30 is supported by the sleeve (40) to rotate so that the rotor cavity (31) in which the filtration process of oil is formed around the sleeve (40); The rotor 30 is coupled to the rotor housing 32 forming the side wall of the rotor 30, the upper side of the rotor housing 32, is rotatably coupled to the sleeve 40 is the sleeve ( A rotor cover 50 which allows oil flowing from 40 to be distributed to the side walls of the rotor cavity 31, and is coupled to the lower side of the rotor housing 32 and rotatably coupled to the sleeve 40 to the rotor. And a disk 60 for allowing the filtered oil of the cavity 31 to flow outward, and the sleeve 40 is directed from the lower side of the rotor cover 50 toward the inner surface 52 of the rotor cover 50. The injection hole 42 is formed to have an inclination angle, such that oil flowing into the rotor cavity 31 through the sleeve 40 is sprayed toward the inner surface 52 of the rotor cover 50.

In the centrifugal separator for liquid filtration according to the present invention, the rotor cover 50 has a center hole 51 formed so that the sleeve 24 is coupled to the center, and is formed to protrude from the inner surface 52. A guiding rib 54 extending outwardly from the center hole 51; The guiding ribs 54 may be arranged to be divided into a plurality of circumferences of the center hole 51 at a predetermined angle, and form a tangent to the center hole 51.

In the centrifugal separator for liquid filtration according to the present invention, the rotor cover 50 further includes a reinforcing hub 56 around the center hole 51, and the guiding rib 54 is the reinforcing hub 54. It is formed to extend in the outer direction from the outside of the 56, so that the central axis of the guiding ribs 54 can make a tangent to the center hole (51).

According to the centrifugal separator for liquid filtration according to the present invention, an angle at which the injection hole 42 formed in the sleeve 40 is inclined from the lower side of the rotor cover 50 toward the inner surface 52 of the rotor cover 50 is determined. Since the oil flowing into the rotor cavity 31 through the sleeve 40 is sprayed toward the inner surface 52 of the rotor cover 50, the rotor cavity 31 is provided through the sleeve 40 through a simple configuration. The oil flowing into it forms a stable flow to the inner surface 52 of the rotor cover 50. Therefore, the oil flowing into the rotor 30 flows into the inner surface 52 of the rotor cover 50 and the residence time is increased through continuous and relatively long paths to the upper path, the side wall path and the lower path, thereby increasing the collection amount and filtering. There is an advantage to increase the efficiency. In addition, the guiding ribs 54 formed on the rotor cover 50 form a tangent to the center hole 51 to which the sleeve 40 is coupled, thereby being shorter than a vortex-shaped rib converging to the center point, such as Mann Hummel. Since it has a relatively longer length than the rib formed in a straight line as in the prior art, it can be expected to effectively filter the impurities contained in the oil while maintaining the active ingredient of the oil.

1 is a drawing for explaining a rotor cover mainly applied to a centrifugal separator of Mannheim & Co., Germany;
2 is a view for explaining the technical spirit of the centrifugal separator for liquid filtration according to the present invention;
3 is a view for explaining a centrifugal separator for liquid filtration according to a preferred embodiment of the present invention;
4 is a cross-sectional view of a sleeve applied to a centrifuge for liquid filtration in accordance with a preferred embodiment of the present invention;
5 is a view for explaining the concept of the rotor cover in the centrifuge for liquid filtration according to a preferred embodiment of the present invention;
6 is a perspective view of a rotor cover applied to a centrifuge for liquid filtration in accordance with a preferred embodiment of the present invention.

2 is a view for explaining the technical spirit of the centrifugal separator for liquid filtration according to the present invention.

Referring to Figure 2, the centrifugal separator 10 for filtration of the liquid according to the present invention is the oil filtration process through the rotor 30 is installed to be rotatable at the pressure of the oil circulated supported by the shaft 20 Be sure to The oil is introduced through the shaft 20 and the sleeve 40, and the oil injected from the sleeve 40 into the rotor cavity 31 is generated by the inner surface of the rotor cover 50. The filtration process progresses through the side wall path | route made of the (circle)) and the lower path | route made by the disk 60. In this case, a filter (not shown) may be installed on the inner surface of the rotor housing 32 forming the sidewall path.

Centrifugal separator 10 for filtration of the liquid according to the present invention so that the flow of oil is made smoothly to the upper path, the side wall path, the lower path to have a long residence time to increase the collection amount to maintain a stable filtration efficiency In order to ensure that the oil injected from the sleeve 40 to the rotor cavity 31 is directed toward the inner surface 52 of the rotor cover 50.

More specifically, the centrifugal separator 10 for filtration according to the present invention includes a shaft 20, a sleeve 40 and a rotor 30 to perform a function of filtering impurities contained in the oil circulated. do. Here, the shaft 20 allows the inflow of oil circulated. The sleeve 40 is supported to rotate on the shaft 20 so that oil flowing through the shaft 20 flows into the rotor cavity 31. The rotor 30 is supported and rotated by the sleeve 40 so that the rotor cavity 31 in which the oil filtration process is performed is formed around the sleeve 40. Of course, the centrifugal separator 10 for the liquid filtration is connected to various components, engines, oil tanks, etc. for supporting and fixing the shaft 20, the sleeve 40 and the rotor 30, the oil flow is made Components such as valves and sensors for controlling the flow and flow of oil, such as piping and valves to be built, will be additionally installed.

In this case, the rotor 30 includes the rotor housing 32, the rotor cover 50, and the disc 60 to form a flow path of oil in which the filtration process is performed. Here, the rotor housing 32 forms the side wall of the rotor 30. The rotor cover 50 is fixedly coupled to the upper side of the rotor housing 32 and rotatably coupled to the sleeve 40 such that oil flowing from the sleeve 40 is distributed to the side walls of the rotor cavity 31. The disc 60 is coupled to the lower side of the rotor housing 32 and rotatably coupled to the sleeve 40 to allow the filtered oil of the rotor cavity 31 to flow outward.

In the centrifugal separator 10 for liquid filtration according to the present invention, the sleeve 40 is formed to have an angle inclined toward the inner surface 52 of the rotor cover 50 from the lower side of the rotor cover 50 42, the oil flowing into the rotor cavity 31 through the sleeve 40 is sprayed toward the inner surface 52 of the rotor cover 50. That is, the centrifugal separator 10 for liquid filtration according to the present invention is formed such that the injection hole 42 formed in the sleeve 40 has an inclination angle in the direction of the inner surface 52 of the rotor cover 50. The oil ejected from the sleeve cavity 41 of the sleeve 40 to the rotor cavity 31 flows to the inner surface 52 of the rotor cover 50 so that the flow path of oil flows into the inner surface 52 of the rotor cover 50. By starting from the upper path formed by the so as to maintain the filtration efficiency to the required degree.

In the present invention, engine oil, lubricating oil, operating oil and the like are collectively referred to as oil. In this case, the oil includes an effective component for each purpose, and is used for filtering various foreign substances used for application purposes such as dust and sludge Liquid. For example, in the case of engine oil, an active ingredient includes a clean dispersant, an antioxidant, an abrasion inhibitor, a viscosity index improver, etc., and forms an oil film on each rotating part of the engine to prevent friction and wear and tear, and when rotating the engine parts. Adsorbs the generated impurities and transfers them to the centrifugal separator 10 for filtration of the liquid according to the present invention, and the centrifugal separator 10 filters the impurities contained in the oil so that the filtered oil is supplied back to the engine. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 to 6, and like reference numerals denote like elements for performing the same functions in FIGS. 2 to 6. In the meantime, detailed description of techniques that can be easily applied by the workers in this field from the technique related to the centrifugal separator for general liquid filtration is omitted in each figure. In the drawings, there is also a portion where the size ratios between the elements are represented somewhat differently or the sizes between the parts that are coupled to each other are expressed differently. However, differences in the representations of these drawings are not intended to limit the scope of the present invention. And therefore, a detailed description thereof will be omitted.

3 is a view for explaining a centrifugal separator for liquid filtration according to a preferred embodiment of the present invention.

Referring to FIG. 3, the centrifuge 10 for filtration of a liquid according to a preferred embodiment of the present invention includes a shaft 20, a sleeve 40, and a rotor 30. 30) is rotated to filter the impurities contained in the oil.

At this time, the shaft 20 is disposed perpendicular to the center of the base frame 12 and fixed. The frame cavity 11 is formed on the upper side of the base frame 12 to which the shaft 20 is coupled, so that the lower cover of the rotor 30 is disposed. The sleeve 20 is fitted to the shaft 20 to be rotatable, and the rotor 30 is rotatably supported on the sleeve 40. The outer cover 16 is covered with the outer side of the rotor 30, and the fastener 18 is coupled to the upper end of the shaft 20 protruding upward of the outer cover 16, such that the outer cover 16 and the shaft ( 20) and the base frame 12 to be fixed.

As such, the rotor 30 is rotatably supported by the shaft 20 supported by the base frame 12 and installed in the outer cover 16. The oil is introduced into the inflow path 13c of the shaft 20 through the inflow paths 13a and 13b of the base frame 12 by the pressure (controlled by the structure of the check valve 14), and the distribution hole. Through 21 and flows into the sleeve cavity 41 is injected into the rotor cavity 31 through the injection roll 42 formed on the upper side of the sleeve 40 through the filtration process, it is discharged to the outside. Oil circulated through the inflow passage 13 of the base frame 12 and the shaft 20 is introduced. In addition, the sleeve 40 is supported to rotate on the shaft 20 such that the sleeve cavity 41 through which oil flows is formed between the shaft 20 so that the oil flowing through the inflow passage 13 flows through the sleeve cavity 41. Flows to the rotor cavity 31 through the upper injection hole 42.

In the centrifugal separator 10 for liquid filtration according to the preferred embodiment of the present invention, the rotor 30 is provided with a rotor housing 32, a rotor cover 50, and a disc 60, and sprayed through the sleeve 40. The upper path, the side wall path and the lower path through which oil flows are formed to form a filtration process. At this time, the rotor cover 50 is fixedly coupled to the upper side of the rotor housing 30, rotatably coupled to the sleeve 40 so that oil flowing from the sleeve 40 flows from the side wall of the rotor cavity 31 (rotor housing 32). To the inner surface of the The disk 62 is formed to have a vertical portion 64, an inclined portion 62, and a fixing flange 66, which form a disk cavity 61, between the sleeve 40 and the fixing flange 66 is formed of a rotor. It is coupled on the lower cover at the lower side of the housing 32. The vertical portion 64 is formed at a constant height, and the oil flowing in the side wall path formed by the rotor housing 32 flows along the inclined portion 62 and rises in the vertical direction to complete the filtration process. Through the flow path to the outside is formed to flow to the lower cover.

The centrifugal separator 10 for filtration according to a preferred embodiment of the present invention is such that the flow of oil smoothly to the upper path, the side wall path, the lower path to the sleeve 40 to maintain the filtration efficiency properly The oil injected into the rotor cavity 31 is directed to the inner surface 52 of the rotor cover 50.

4 is a cross-sectional view of a sleeve applied to a centrifuge for liquid filtration in accordance with a preferred embodiment of the present invention.

3 and 4, in the centrifuge 10 for liquid filtration in accordance with a preferred embodiment of the present invention, the sleeve 40 is an inner surface 52 of the rotor cover 50 under the rotor cover 50. It is provided with an injection hole 42 formed to have an angle inclined in the direction, so that the oil flowing into the rotor cavity 31 through the sleeve 40 is injected in the direction of the inner surface 52 of the rotor cover 50 It features.

Through such a configuration, the centrifugal separator 10 for filtration of the liquid according to the present embodiment has an injection hole 42 formed in the sleeve 40 and an inner surface 52 of the rotor cover 50 at the lower side of the rotor cover 50. It is formed to have an angle inclined to the () direction so that the oil flowing into the rotor cavity 31 through the sleeve 40 is sprayed toward the inner surface 52 of the rotor cover 50, the sleeve 40 through a simple configuration The oil flowing into the rotor cavity 31 through the to form a stable flow to the inner surface 52 of the rotor cover 50.

5 is a view for explaining the concept of the rotor cover in the centrifuge for liquid filtration according to a preferred embodiment of the present invention, Figure 6 is a rotor applied to the centrifuge for liquid filtration according to a preferred embodiment of the present invention A perspective view of a cover.

3 and 5, the centrifugal separator 10 for filtration according to a preferred embodiment of the present invention has a simple structure (constitution of the injection hole 42) compared with the prior art in order to maintain an appropriate filtration efficiency Technical characteristics of preventing the filtration of the oil active ingredient due to the high speed rotation through the improvement of the rotor cover 50 to improve the injection direction of the oil through the sleeve 40 to the inner surface 52 of the rotor cover 50 Has

More specifically, in the centrifugal separator 20 for liquid filtration according to the present embodiment, the rotor cover 50 forms a guiding rib 54 on the inner surface 52 of the guiding rib 54. Although the length L is shorter than the vortex-shaped rib (the proposed form of Mann & Hummel, Germany), which converges to the center point, it is formed longer than the rib formed in the straight shape, so that the impurities contained in the oil are prevented while the active ingredient of the oil is not filtered. Characterized in that it is effectively filtered. In this embodiment, the rotor cover 50 has a center hole 51 formed so that the sleeve 24 is coupled to the center. In addition, the guiding ribs 54 are formed to protrude from the inner surface 52 and extend outwardly from the center hole 51, and a plurality of the guiding ribs 54 are formed in the center hole 51. It is divided and disposed at a predetermined angle around the periphery, and is formed to make a tangent to the central hole 51. That is, the guiding rib 54 is formed to make a tangent at any contact 53 divided at a predetermined angle of the circle forming the center hole 51. Accordingly, the length L of the guiding rib 54 formed from the contact 53 with the center hole 51 is shorter than the vortex-shaped rib converging to the center point, but longer than the rib formed in the straight shape.

In the centrifugal separator 10 for liquid filtration according to the present embodiment as described above, the rotor cover 50 forms a vortex-shaped rib that converges to a center point, thereby maximizing the centrifugal force so that the degree of filtration of the oil is very high. By forming ribs in a straight shape, the centrifugal force can be reduced to allow the medium performance of the technology to lower the filtration degree of the oil. As a result, the problem that the centrifugal force is too large and the effective component of the oil is filtered and the centrifugal force is too small It is expected to solve the problem that impurities such as sludge or foreign matter contained in the filter is not filtered.

3 and 6, the rotor cover 50 of the centrifugal separator 10 for liquid filtration according to a preferred embodiment of the present invention has a center hole 51 formed such that the sleeve 40 is coupled to the center thereof. . And, it is formed to protrude to the inner side, and has a guiding rib 54 formed extending outward from the center hole 51, further comprising a reinforcing hub 56 around the center hole 51, The guiding ribs 54 extend outwardly from the outer side of the reinforcing hub 56, so that the center axis of the guiding ribs 54 is tangent to the center hole 51.

More specifically, in the centrifuge 10 for liquid filtration according to the present embodiment, the rotor cover 50 is provided with a reinforcing hub 56 around the center hole 51. The reinforcing hub 56 has a function of reinforcing the circumference of the center hole 51 into which the sleeve 40 is inserted. At this time, the guiding rib 54 is formed to extend outwardly from the outer side of the reinforcing hub 56, so that the central axis of the guiding rib 54 forms a tangent to the contact hole 53 in the center hole 51. do. That is, the guiding rib 54 of the rotor cover 50 in the centrifugal separator 10 for filtration according to the present embodiment to make a tangent to the center hole 51, the required length from the center hole 51 It may be configured by dropping or by adjusting the width of the rib 54. Of course, in this case, the angle of the guiding ribs 54 is such that the central axis is tangent to the center hole 51. Thus, the centrifuge 10 for liquid filtration according to the present embodiment optimizes the length of the guiding ribs 54 while confining the flow of oil within the limited rotor cover 50 length. Shorter than the vortex-shaped rib, but can be formed longer than the rib formed in a straight form.

As described above, the centrifugal separator for liquid filtration according to a preferred embodiment of the present invention is shown in accordance with the above description and drawings, but this is merely described for example and various within the scope without departing from the spirit of the present invention. It will be appreciated by those skilled in the art that changes and variations are possible.

10 centrifuge for liquid filtration
20: shaft 30: rotor
31: rotor cavity 32: rotor housing
40: sleeve 42: injection hole
50: rotor cover 51: center hole
52: (rotor cover) inner surface 54: guiding rib
60 disc

Claims (3)

In the centrifugal separator for liquid filtration for filtering impurities contained in the circulating oil,
A shaft 20 to allow the inflow of circulated oil;
A sleeve (40) supported to rotate on the shaft (20) so that oil flowing through the shaft (20) flows into the rotor cavity (31);
Rotor 30 is supported by the sleeve (40) to rotate so that the rotor cavity (31) in which the filtration process of oil is formed around the sleeve (40);
The rotor 30 and the rotor housing 32 to form a side wall of the rotor 30,
Rotor cover 50 is fixed to the upper side of the rotor housing 32, rotatably coupled to the sleeve 40 so that the oil flowing from the sleeve 40 is dispersed to the side wall of the rotor cavity 31 And,
A disk 60 coupled to the lower side of the rotor housing 32 and rotatably coupled to the sleeve 40 to allow the filtered oil in the rotor cavity 31 to flow outward,
The sleeve 40 has an injection hole 42 formed to have an angle inclined toward the inner surface 52 of the rotor cover 50 from the lower side of the rotor cover 50,
Centrifuge for liquid filtration characterized in that the oil flowing into the rotor cavity (31) through the sleeve (40) is sprayed toward the inner surface (52) of the rotor cover (50).
The method according to claim 1,
The rotor cover 50 has a center hole 51 formed so that the sleeve 24 is coupled to the center,
A guiding rib (54) formed to protrude from the inner surface (52) and extending outwardly from the center hole (51);
The guiding ribs 54 are arranged in a plurality of divided to the predetermined angle around the center hole 51, the centrifugal separator for liquid filtration characterized in that it is formed to make a tangent to the center hole (51). .
3. The method of claim 2,
The rotor cover 50 further includes a reinforcing hub 56 around the center hole 51,
The guiding rib 54 extends from the outer side of the reinforcing hub 56 to the outer side, and the center axis line of the guiding rib 54 makes a tangent to the center hole 51. Rotor cover of centrifuge for liquid filtration.

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