centrifugal separator

Abstract

The invention relates to a centrifugal separator (101), wherein a drive chamber (110) is formed in a drive housing (104), wherein a separation chamber (110) is formed in a centrifuge housing (103), wherein a partition wall (112) is formed between the drive chamber (110) and the separation chamber (111), wherein the partition wall (112) comprises an opening (113), wherein a shaft (106) extends through the opening (113) of the partition wall (112) into the separation chamber (111) and the drive chamber (110), wherein the separator rotor (105) is connected to the shaft (106) in a rotationally fixed manner and is arranged in the separation chamber (111), wherein a drive (109) is arranged in the drive chamber (110) and drives the shaft (106). The drive (109) is designed as an electric motor (114) that directly drives the shaft (106), so that the shaft (106) forms a motor shaft (115) of the electric motor (114).

Description

Technical Field

[0001] The present invention relates to a centrifugal separator according to the invention. Background Art

[0002] Centrifugal separators are generally known, in particular for separating oil from blow-by gases in internal combustion engines. Blow-by gases are generally understood to be gases that escape into the crankcase through leakage between the piston, piston rings, and cylinder running surfaces and absorb oil on their way to the crankcase ventilation system. Centrifugal separators are used to purify the blow-by gas before it escapes into the environment and to return the absorbed oil to the crankcase.

[0003] DE 202016106867 U1 discloses an oil separator configured as a centrifugal separator, comprising a centrifuge housing, a drive housing, a separator rotor, a shaft, a first bearing, a second bearing, and a drive, wherein a drive chamber is formed in the drive housing, wherein a separation chamber is formed in the centrifuge housing, wherein a partition wall is formed between the drive chamber and the separation chamber, wherein the shaft extends through the partition wall into the separation chamber and the drive chamber, wherein the separator rotor is connected to the shaft in a rotationally fixed manner and is arranged in the separation chamber, wherein the drive is arranged in the drive chamber and drives the shaft. Summary of the Invention

[0004] The object of the present invention is to provide a centrifugal separator that is structurally simple, compact, and robust. This object is achieved according to the present invention. Advantageous and expedient developments are described in the description.

[0005] A centrifugal separator for separating oil according to the present invention comprises a centrifuge housing, a drive housing, a separator rotor, a shaft, a first bearing, a second bearing, and a drive, wherein a drive chamber is formed in the drive housing, wherein a separation chamber is formed in the centrifuge housing, wherein a partition wall is formed between the drive chamber and the separation chamber, wherein the partition wall comprises an opening, wherein the shaft extends through the opening in the partition wall into the separation chamber and the drive chamber, wherein the separator rotor is connected to the shaft in a rotationally fixed manner and is arranged in the separation chamber, wherein the drive is arranged in the drive chamber and drives the shaft, and wherein the drive is designed as an electric motor that directly drives the shaft, such that the shaft forms a motor shaft of the electric motor. This results in a simple, compact, and robust structure of the centrifugal separator.

[0006] According to a first embodiment variant, the first bearing is held in the opening of the partition wall, and the shaft extends through the first bearing. As a result, the shaft is mounted in the central region of the entire housing, which comprises the centrifuge housing and the drive housing. This arrangement results in a compact and robust design of the centrifugal separator.

[0007] Furthermore, the electric motor comprises a separator tank, wherein the hollow cylindrical middle part of the separator tank is arranged between the rotor and the stator of the electric motor. The stator is thus positioned around the rotor in a protected manner between the drive housing and the separator tank, so that the electrical components of the electric motor are encapsulated against separated oil.

[0008] It is further provided that the separator tank comprises an annular flange above the middle portion facing the partition wall and is sealed relative to the partition wall by means of this flange, in particular by inserting a peripheral seal. This allows for a technically simple and optimally effective connection of the separator tank to the partition wall.

[0009] It is further provided that the separating tank forms a connecting pipe below its central portion and is accommodated by means of this connecting pipe in an opening of the driver housing, particularly when a peripheral seal is inserted. It is further provided that the connecting pipe is designed to allow external access to the oil channel. This allows a technically simple and optimally effective connection of the separating tank to the driver housing, also opposite the separating wall. Since the opening of the separating wall and the opening of the driver housing are opposite each other, the separating tank can be clamped between the separating wall and the base plate of the driver housing opposite the separating wall, thereby permanently maintaining the pressing pressure on the seal.

[0010] A second embodiment of the invention provides that the shaft extends through an opening in the drive housing, and the first bearing is arranged outside the drive chamber and mounted on the drive housing. This results in a particularly stable mounting of the shaft, which also allows the bearing to be modified with minimal effort, since the drive housing does not have to be disassembled for modification.

[0011] It is further provided that the partition wall is formed by the base of the centrifuge housing. The resulting use of the base of the centrifuge housing as a cover for the drive housing saves material. In the first embodiment, this design allows for rapid replacement of the electric motor, since the motor can be easily removed from the centrifuge housing together with the drive housing.

[0012] It is further provided that an air gap is formed between the separating pot and the rotor, in particular at the outer circumference, wherein the air gap is dimensioned in particular such that the separating pot is spaced apart from the rotor, so that oil can flow out unhindered along the inner wall of the separating pot in the direction of the longitudinal axis of the shaft. This embodiment ensures that the function of the electric motor is not impaired by escaping oil and that escaping oil does not accumulate in the rotor area and brake the electric motor.

[0013] In both embodiments, the first bearing is configured without seals, allowing oil to flow along the rolling elements of the bearing between the inner and outer rings of the first bearing. This ensures, in the first embodiment, that the oil flowing out can flow from the separation chamber into the drive chamber without undesirable backflow. In the second embodiment, this ensures that the oil flowing out can flow from the drive chamber into the oil channel through the opening in the driver housing without undesirable backflow. In both embodiments, continuous lubrication of the first bearing is ensured, thereby minimizing wear on the first bearing and reliably achieving its intended service life.

[0014] It is further provided that the first bearing is configured as a drain and the upper side of the partition wall is shaped such that when the shaft is vertical in space, oil collected on the upper side flows toward the first bearing, thereby preventing the outflowing oil from undesirably flowing back.

[0015] Furthermore, it is provided that the centrifugal separator includes an impeller, wherein the impeller is driven by the shaft and is, in particular, connected to the shaft in a rotationally fixed manner, wherein the impeller is, in particular, arranged in a separating tank adjacent to the rotor of the electric motor and, in particular, arranged below or above the rotor of the electric motor. Equipping the centrifugal separator with such an impeller further improves the outflow of the separated oil through the electric motor, thereby further reducing the likelihood of undesirable backflow, thereby making the centrifugal separator extremely reliable in terms of the discharge of the separated oil.

[0016] Furthermore, the rotating impeller generates an underpressure between the opening of the partition wall and the impeller in the partition tank, and generates an overpressure toward the opening of the drive housing, depending on its arrangement below or above the rotor. This impeller design also facilitates the backflow-free discharge of the separated oil.

[0017] Furthermore, it is provided that the stator of the electric motor rests either directly on the inner side of the drive housing or indirectly with the insertion of a heat conductor, thereby ensuring optimal cooling of the electric motor via the drive housing and additionally via the centrifuge housing connected to the drive housing.

[0018] Furthermore, it is provided that the electronic components of the electronic unit of the electric motor are thermally connected to the inner side of the base plate of the driver housing via an electrically insulating, heat-conducting medium, in particular a thermally conductive paste, wherein the electronic components are arranged in particular on a printed circuit board. This ensures optimal cooling of the electronic components of the electric motor, thereby reliably preventing overheating of these components.

[0019] Furthermore, the drive housing includes a connecting flange facing the centrifuge housing and is connected to a corresponding flange formed on the underside of the base plate of the centrifuge housing, so that the drive chamber is closed on all sides. This configuration ensures that the centrifuge housing and the drive housing are held together reliably and stably, and that the drive housing or the electric motor housed therein is easily aligned with the centrifuge housing. Furthermore, the drive housing can be easily and time-savingly disassembled and assembled for modifications.

[0020] Furthermore, it is provided that the centrifugal separator is designed as a blow-by gas centrifugal separator for an internal combustion engine.

[0021] It is further provided that an inlet for the blow-by gas into the separation chamber is formed via the second bearing or via the second bearing and at least one inlet channel (143a, 143b) through the centrifuge housing. This design allows the centrifuge housing to be manufactured with more favorable tool costs, since fewer openings need to be provided. Furthermore, this allows the second bearing to be lubricated permanently, cost-effectively, and effectively, thereby extending its service life.

[0022] Finally, it is provided that the centrifugal separator comprises a blow-by gas connection, wherein the blow-by gas connection is arranged on the centrifuge housing and is dimensioned such that blow-by gas is supplied via the blow-by gas connection to the second bearing or to the second bearing and the at least one inlet channel. This blow-by gas connection allows the centrifugal separator to be easily connected to the internal combustion engine.

[0023] In the sense of the present invention, the separation of oil also includes the separation of dirt particles contained in the blow-by gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Further details of the invention are described on the basis of schematically illustrated embodiments in the drawings.

[0025] In this case:

[0026] FIG. 1a shows a schematic sectional view of the upper part of a first embodiment variant of a centrifugal separator according to the present invention;

[0027] FIG. 1b shows a schematic sectional view of the lower part of a first embodiment variant of a centrifugal separator according to the invention, the upper part of which has been Figure 1a is shown in; and

[0028] Figure 2 A schematic sectional view of a second embodiment variant of the centrifugal separator according to the invention is shown. DETAILED DESCRIPTION

[0029] Figure 1a and 1b A first embodiment variant of a centrifugal separator 101 according to the invention is shown schematically and divided into two figures, wherein the centrifugal separator 101 is designed as a blow-by gas centrifugal separator 102. In this case, Figure 1a The upper part of the centrifugal separator 101 is shown, Figure 1b The lower part of the centrifugal separator 101 is shown.

[0030] A centrifugal separator 101 for separating oil 1 includes a centrifuge housing 103, a drive housing 104, a separator rotor 105, a shaft 106, a first bearing 107, a second bearing 108, and a drive 109. A drive chamber 110 is formed in the drive housing 104, and a separation chamber 111 is formed in the centrifuge housing 103. A partition wall 112 is formed between the drive chamber 110 and the separation chamber 111, wherein the partition wall 112 includes an opening 113. The shaft 106 passes through the opening 113 in the partition wall 112 and enters the separation chamber 111 and the drive chamber 110. The separator rotor 105 is connected to the shaft 106 in a rotationally fixed manner and is arranged in the separation chamber 111. The drive 109 is arranged in the drive chamber 110 and drives the shaft 106. The drive 109 is configured as an electric motor 114, which directly drives the shaft 106, so that the shaft 106 forms the motor shaft 115 of the electric motor 114.

[0031] Although the centrifuge housing 103 and shaft 106 are Figure 1a and Figure 1b are shown with different shading in Figure 1a and 1b The wall thicknesses of the centrifuge housing 103 shown in FIG. 1 are different from each other, but the overall structure of the centrifugal separator 101 should be understood as follows: Figure 1a The upper portion shown is placed on the centrifuge housing 103 Figure 1b On the lower part visible in the figure, a closed separation chamber 111 is formed thereby.

[0032] The separator rotor 105 is shown exemplarily as a disk package 116 in the form of stacked disks 117. Above the separator rotor 105, the centrifuge housing 103 has a further opening 118 in which the second bearing 108 is accommodated. In principle, disk packages 116 with the most diverse disk geometries can be used. Figure 1a The circular disk 119 shown is formed as a flat disk 120. This design serves only as an example to explain the structure of the separator rotor 105. It is provided that the separator rotor 105 is designed according to the respective requirements.

[0033] The centrifugal separator 101 further comprises an inlet 121 and an outlet 122 , both of which are shown purely schematically, on the centrifuge housing 103 . The so-called blow-by gas 2 flows into the separation chamber 111 through the inlet 121 , while the clean gas 3 flows out of the separation chamber through the outlet 122 .

[0034] A first bearing 107, also referred to as the lower bearing, is held in an opening 113 of a partition wall 112. In this case, the partition wall 112 is formed by the centrifuge housing 103. The shaft 106 passes through the first bearing 107. With respect to the spatial orientation of the first bearing 107 and the centrifugal separator 101, the separator rotor 105 is mounted at the upper end 106a of the shaft 106, while the motor 114 is arranged at the lower end 106b of the shaft 106.

[0035] The oil 1 separated from the blow-by gas 2 collects on the upper side 112a of the partition wall 112 and flows through the first or lower bearing 107, which is designed as a roller bearing, between the outer ring 123a and the inner ring 123b of the lower bearing, past the rolling elements 123c of the lower bearing, and into the drive chamber 110. According to an alternative embodiment, the upper and lower bearings are not designed as roller bearings, but as plain bearings. It can also be provided that one of the two bearings is designed as a roller bearing, while the other of the two bearings is designed as a plain bearing.

[0036] The motor 114 includes a separator tank 124, wherein a hollow cylindrical middle portion 124b of the separator tank 124 is arranged between a rotor 125 of the motor 114 and a stator 126 of the motor 114. Above the middle portion 124b, the separator tank 124 includes an annular flange 124a facing the separator wall 112. Figure 1b In the embodiment variant, the separator tank 124 seals against the underside 112b of the partition wall 112 using an annular flange 124a with the interposition of a peripheral seal 127. Alternatively, a sealed radial contact can be provided selectively with or without a seal. In principle, the separator tank and any sealing elements present are designed so that oil flowing out of the drive chamber is retained only within the separator tank, while the portion of the drive chamber located outside the separator tank is reliably protected from the intrusion of the flowing oil.

[0037] Below the middle portion 124b, the separator tank 124 includes a connecting pipe 124c. This connecting pipe allows the separator tank 124 to be housed in an opening 129 of the drive housing 104 with a seal inserted around the periphery. In this case, the seal rests against a wall 129a of the opening 129. The opening 129 is formed in the base plate 130 of the drive housing 104. In this case, the connecting pipe 124c, in the area where it passes through the opening 129 and extends beyond the seal, is designed so that the tubular oil passage 4 can be connected to the connecting pipe 124c. The opening 129 formed in the base plate 130 of the drive housing 104 is directly opposite the opening 113 formed in the separator wall 112 with respect to the longitudinal axis L106 of the shaft 106.

[0038] The partition wall 112 is formed by the bottom plate 131 of the centrifuge housing 103. The drive housing 104 is configured to be open toward the partition wall 112.

[0039] A peripheral air gap 132 is formed between the separator tank 124 and the rotor 125, wherein the size of the air gap 132 is designed to space the centrifugal separator 101 from the rotor 125 so that oil can flow out unimpeded at the inner wall 133 of the separator tank 124 in the y' direction of the longitudinal axis L106 of the shaft 106.

[0040] The first bearing or lower bearing 107 mentioned above is constructed without seals, so that the separated oil can flow between the inner ring 123b and the outer ring 123a both when the shaft 106 is stationary and when the shaft 106 is rotating.

[0041] The first or lower bearing 107 is thus configured with a drain 134. In this case, according to a variant embodiment, it can also be provided that the upper side 112a of the partition wall 112 is formed in a funnel shape so that the oil 1 collected on the upper side 112a when the shaft 106 is vertical in space is guided to the drain 134.

[0042] The centrifugal separator 101 or the motor 114 includes an impeller 135. The impeller 135 is driven by the shaft 106 and is connected to the shaft 106 in a rotationally fixed manner. The impeller 135 is arranged in the separator tank 124, adjacent to and below the rotor 125 of the motor 114. This provides the motor 114 with a compact design. Alternatively, the impeller can be arranged above the rotor, thus also achieving a compact design of the motor. According to another variant, the impeller can be constructed in two parts, with one impeller part being arranged above the rotor and the other impeller part being arranged below the rotor.

[0043] The rotating impeller 135 generates a negative pressure between the opening 113 of the partition wall 112 and the impeller 135 in the partition tank 124. Furthermore, the impeller 135 rotating below the rotor 125 generates an overpressure toward the opening 129 in the base plate 130 of the drive housing 104. This facilitates the discharge of the separated oil in the direction of the arrow y'.

[0044] The stator 126 of the electric motor 114 rests directly on the inner side 104a of the driver housing 104. The electronic components 136 of the electronic unit 137 of the electric motor 114 are thermally connected to the inner side 130a of the base plate 130 of the driver housing 104 via an electrically insulating, heat-conducting medium 138. In this case, the electronic components 136 are arranged on a printed circuit board 139.

[0045] The drive housing 104 comprises a connecting flange 140 facing the centrifuge housing 103 and is connected via this connecting flange to a corresponding flange 141 formed on the underside 112b of the partition wall 112 of the centrifuge housing 103, so that a stable integral housing 142 is formed and the drive chamber 110 is closed on all sides.

[0046] The blow-by gas 2 flows into the inlet 121 of the separation chamber 111 (see Figure 1a ) is formed by the second bearing 108 and two input channels 143a, 143b passing through the centrifuge housing 103. In addition, Figure 1a It can also be seen that the centrifugal separator 101 includes a blow-by gas connection 144. This blow-by gas connection 144 is arranged on the centrifuge housing 103 and is dimensioned so that blow-by gas 2 is applied from this blow-by gas connection to the second bearing 108 and to the inlet channels 143a, 143b. Thus, the blow-by gas 2 can pass through the upper bearing 108 and flow into the separation chamber through the inlet channels 143a, 143b.

[0047] Figure 2 A second embodiment variant of a centrifugal separator 201 according to the invention is shown in a schematic sectional view. In this case, the centrifuge housing of the centrifugal separator 201 is not shown. However, the centrifuge housing is designed in principle to be compatible with Figure 1a and Figure 1b The centrifuge housing shown in is similar. In this respect, reference is made to the description there.

[0048] Unlike the centrifuge housing of the first embodiment, the centrifuge housing of the second embodiment has an opening arranged in the partition wall, but does not include a first bearing held in the opening. Instead, the first bearing 207 of the second embodiment is arranged below the motor 214, as shown in FIG. Figure 2 shown.

[0049] The oil 1 can therefore flow out through an opening (not shown) of the partition wall directly into the drive chamber 210 of the drive housing 204 .

[0050] The shaft 206 extends through an opening 229 of the driver housing 204 , wherein the first bearing 207 is arranged outside the drive chamber 210 and mounted on the driver housing 204 as described above.

[0051] Additionally, the motor 214 and its separator tank 224 and the drive housing 204 are designed to Figure 1a and Figure 1b The first embodiment variant shown in is similar. In this respect, reference is made to the description there.

[0052] The separated oil also flows through and lubricates Figure 2 The first bearing or lower bearing 207 of the second embodiment variant shown. However, in the second embodiment variant, the separated oil first flows through the electric motor 214 along the separator tank 224 and only flows through the first bearing 207 after it flows through the opening 229 in the bottom plate 230 of the drive housing 204. In order to accommodate and retain the first bearing 207, the drive housing 204 is supplemented with a hollow cylindrical bearing bracket 251, which is connected to the bottom plate 230 of the drive housing 204, compared to the drive housing of the first embodiment. According to an embodiment variant not shown, the bearing bracket 251 is constructed so that it includes a connecting pipe for connecting the oil channel. The second bearing according to the embodiment not shown Figure 1a arrangement and is lubricated by means of blow-by gas input to the centrifugal separator 201 from the allocated internal combustion engine.

[0053] In principle, it should be added that the advantage of a sealless first bearing is that the service life of the centrifugal separator can significantly exceed the service life of the shaft seal. This is important in order to be able to meet the high service life requirements of the centrifugal separator.

[0054] When the shaft is driven by the rotor of the electric motor, the oil is separated in the centrifuge housing of the centrifuge, through which the blowby air flows. All separated oil then flows through the first or lower bearing, also known as the lower shaft bearing. The impeller, located on the same shaft, generates a negative pressure that supports the oil flow through the air gap between the rotor and the separator tank, while also creating an overpressure that ensures the oil flows toward the crankcase of the internal combustion engine. The oil channel leading to the crankcase can be mounted externally on the drive housing, which also forms another part of the centrifuge housing, or integrated directly into the drive housing. The stator and the printed circuit board with the electronic components for the motor control are arranged in the drive housing, allowing heat losses from the stator to be dissipated directly, while heat losses from the electronic components on the printed circuit board can be dissipated to the cooler drive housing via a heat transfer medium in the form of thermal paste.

[0055] In a second embodiment, the first bearing, also referred to as the lower shaft bearing, is located below the rotor. In this arrangement as well, all separated oil flows through the first bearing and is used to lubricate the first bearing and dissipate heat losses.

[0056] The advantages mentioned below are also achieved in particular by a design corresponding to the first and second embodiment variants:

[0057] - Reliable function of the motor beyond the required service life;

[0058] - Avoid sedimentation in the separator tank;

[0059] - Save costs by not using shaft seals;

[0060] - Lower thermal load in the first bearing area due to the absence of power losses from the shaft seal;

[0061] - Cooling and lubricating the first bearing or the shaft bearing by means of the separated oil;

[0062] - The separated oil is reliably returned to the crankcase of the internal combustion engine;

[0063] -Safe operation even if the drive shaft swings up to ±45° or the entire centrifugal separator swings out of the vertical position;

[0064] The stator of the electric motor and the electronic components on the printed circuit board are cooled by the centrifuge housing or the drive housing.

[0065] List of reference numerals:

[0066] 1 oil

[0067] 2 Blowing gas

[0068] 3 Purify gas

[0069] 4 Oil channels

[0070] 101 Centrifugal Separator

[0071] 102 Blow-by gas centrifugal separator

[0072] 103 Centrifuge housing

[0073] 104 Driver housing

[0074] 104a The inner side of 104

[0075] 105 Separator Rotor

[0076] 106 axis

[0077] 106a The upper end of 106

[0078] 106b The lower end of 106

[0079] 107 first bearing / lower bearing

[0080] 108 Second bearing

[0081] 109 Driver

[0082] 110 Drive Room

[0083] 111 Separation Chamber

[0084] 112 partition wall

[0085] 112a Upper side of partition wall 112

[0086] 112b Lower side of partition wall 112

[0087] 113 Opening in 112

[0088] 114 Electric Motor

[0089] 115 motor shaft

[0090] 116 disk group

[0091] 117 stacking tray

[0092] 118 Additional openings in 103

[0093] 119 Disc

[0094] 120 flat plate

[0095] 121 Entrance

[0096] 122 Exit

[0097] 123a 107 outer ring

[0098] 123b 107 inner circle

[0099] 123c 107 rolling element

[0100] 124 Separated Tanks

[0101] 124a Annular flange

[0102] 124b The center part of 124

[0103] 124c connecting pipe

[0104] 125 114 rotor

[0105] 126 114 stator

[0106] 127 124 124a seal

[0107] 129 Opening of the driver housing

[0108] 129a 129's wall

[0109] 130 104 base plate

[0110] 130a The inner side of 130

[0111] 131 103 base plate

[0112] 132 Air gap between 124 and 125

[0113] 133 124 inner wall

[0114] 134 discharge port

[0115] 135 impeller

[0116] 136 electronic components

[0117] 137 Electronic Unit

[0118] 138 thermal conductivity medium

[0119] 139 printed circuit board

[0120] 140 104 connection flange

[0121] Corresponding flange of 141 112

[0122] 142 overall shell

[0123] 143a, 143b input channels

[0124] 144 Blow-off gas connection

[0125] LI06 Longitudinal axis of the shaft

[0126] 201 Centrifugal Separator

[0127] 204 driver housing

[0128] 206 shaft

[0129] 207 First Bearing

[0130] 210 Drive Room

[0131] 214 Electric Motor

[0132] 224 Separated Tank

[0133] 229 204 opening

[0134] 251 hollow cylindrical bearing bracket

Claims

1. A centrifugal separator comprising a centrifuge housing (103), a drive housing, a separator rotor (105), a shaft, a first bearing, a second bearing (108) and a drive (109), - wherein a drive chamber is formed within the drive housing, - wherein a separation chamber (111) is formed in the centrifuge housing (103), - wherein a partition wall (112) is formed between the drive chamber and the separation chamber (111), - wherein the partition wall (112) comprises an opening (113) of the partition wall (112), - wherein the shaft extends through the opening (113) of the partition wall (112) into the separation chamber (111) and the drive chamber, - wherein the separator rotor (105) is connected to the shaft in a rotationally fixed manner and is arranged in the separation chamber (111), - wherein the drive (109) is arranged in the drive chamber and drives the shaft, - the drive (109) is configured to directly drive the electric motor (114) of the shaft, so that the shaft forms the motor shaft (115) of the electric motor (114), The electric motor (114) includes a separator tank (124), wherein a hollow cylindrical middle portion (124b) of the separator tank (124) is arranged between a rotor (125) of the electric motor (114) and a stator (126) of the electric motor (114).

2. The centrifugal separator according to claim 1, characterized in that The centrifugal separator is a centrifugal separator for separating oil (1).

3. The centrifugal separator according to claim 1, wherein The first bearing is held in the opening (113) of the partition wall (112) and the shaft passes through the first bearing.

4. The centrifugal separator according to claim 1, wherein The partition tank (124) includes an annular flange (124a) above the middle portion (124b) facing the partition wall (112), and is sealed relative to the partition wall (112) by the annular flange.

5. The centrifugal separator according to claim 4, characterized in that The partition tank (124) is sealed relative to the partition wall (112) with the insertion of a peripheral seal.

6. The centrifugal separator according to claim 1, wherein The separation tank (124) forms a connecting pipe (124c) below the middle portion (124b) and is accommodated in the opening of the driver housing by means of the connecting pipe.

7. The centrifugal separator according to claim 6, characterized in that The separator pot (124) is received in the opening of the driver housing with the peripheral seal interposed therein.

8. The centrifugal separator according to claim 1, wherein The shaft extends through an opening in the driver housing and the first bearing is arranged outside the drive chamber and mounted on the driver housing.

9. The centrifugal separator according to any one of claims 1 to 8, characterized in that The partition wall (112) is formed by the bottom plate (131) of the centrifuge housing (103).

10. The centrifugal separator according to claim 1, wherein An air gap (132) is formed between the separation pot (124) and the rotor (125) of the electric motor (114).

11. The centrifugal separator according to claim 10, characterized in that An air gap (132) is formed circumferentially between the separating pot (124) and the rotor (125) of the electric motor (114).

12. The centrifugal separator according to claim 10, characterized in that The air gap (132) is sized to space the separator tank (124) from the rotor (125) of the electric motor (114), so that the oil (1) can flow out unhindered on the inner wall (133) of the separator tank (124) in the direction of the longitudinal axis (L106) of the shaft.

13. The centrifugal separator according to claim 3 or 8, characterized in that The first bearing is constructed without a seal so that oil (1) can flow along the rolling elements (123c) of the first bearing between the inner ring (123b) and the outer ring (123a) of the first bearing.

14. The centrifugal separator according to claim 1, wherein The first bearing is configured as a drain (134) and the upper side (112a) of the partition wall (112) is shaped so that oil (1) collected on the upper side (112a) flows toward the first bearing when the shaft is vertical in space.

15. The centrifugal separator according to claim 1, wherein The centrifugal separator comprises an impeller (135), wherein the impeller (135) is driven by the shaft.

16. The centrifugal separator according to claim 15, characterized in that The impeller (135) is connected to the shaft in a rotationally fixed manner.

17. The centrifugal separator according to claim 15, characterized in that The impeller (135) is arranged in the separation tank (124) adjacent to the rotor (125) of the electric motor (114).

18. The centrifugal separator according to claim 17, characterized in that The impeller (135) is arranged below or above the rotor (125) of the electric motor (114).

19. The centrifugal separator according to claim 18, characterized in that The rotating impeller (135) generates a negative pressure between the opening (113) of the partition wall (112) and the impeller (135), and the rotating impeller (135) generates an overpressure toward the opening of the drive housing, depending on its arrangement below or above the rotor (125) of the electric motor (114).

20. The centrifugal separator according to any one of claims 1 to 8, characterized in that The stator (126) of the electric motor (114) rests either directly on the inner side (104a) of the drive housing or indirectly on the inner side (104a) of the drive housing with the insertion of a heat conductor.

21. The centrifugal separator according to any one of claims 1 to 8, characterized in that The electronic components (136) of the electronic unit (137) of the electric motor (114) are thermally connected to the inner side (130a) of the base plate (130) of the drive housing via an electrically insulating heat-conducting medium (138).

22. The centrifugal separator according to claim 21, characterized in that The electrically insulating heat-conducting medium is heat-conducting paste.

23. The centrifugal separator according to claim 21, characterized in that The electronic components (136) are arranged on a printed circuit board (139).

24. The centrifugal separator according to any one of claims 1 to 8, characterized in that The drive housing comprises a connecting flange (140) facing the centrifuge housing (103) and is connected by means of the connecting flange to a corresponding flange (141) formed on the underside (112b) of the partition wall (112) of the centrifuge housing (103), so that the drive chamber is closed on all sides.

25. The centrifugal separator according to claim 1, wherein The centrifugal separator is designed as a blow-by gas centrifugal separator for an internal combustion engine.

26. The centrifugal separator according to any one of claims 1 to 8, characterized in that An inlet (121) for the blow-by gas (2) to flow into the separation chamber (111) is formed via the second bearing (108) or via the second bearing (108) and at least one inlet channel through the centrifuge housing (103).

27. The centrifugal separator according to claim 26, characterized in that The centrifugal separator comprises a blow-by gas connection (144), wherein the blow-by gas connection (144) is arranged on the centrifuge housing (103) and is dimensioned such that blow-by gas (2) is supplied from the blow-by gas connection to the second bearing (108) or to the second bearing (108) and at least one input channel.

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