Separator with direct drive

Abstract

The separator (1) rotates during operation and comprises a unit having a drum (2) and a drive spindle (3), and a drive motor (10) configured as an electric motor for rotating the drive spindle, the drive motor (10) having a stator (20) and a rotor (21), the rotor (21) being arranged on the drive spindle (3), the stator (20) being arranged radially spaced from the rotor (21) in a drive housing (11) that does not rotate during operation, the stator (20) having at least one or more winding heads (20a, 20b). At least one chamber (K1, K2) is formed above at least one of the winding heads (20a, 20b), and a coolant film or coolant bath is formed in this chamber (K1, K2) during operation, and the winding heads (20a, 20b) are cooled by the coolant during operation.

Description

Technical Field

[0001] The present invention relates to a separator having the features of the preamble of claim 1 and a method for operating the same.

Background Art

[0002] Such separators, which are suitable for industrial use and can desirably be used for continuous operation, are known from the prior art, for example, from German Patent Publication No. 10 2017 113 649.

[0003] Among the known systems, there is a configuration in which a drum, a drive spindle, and an electric drive motor are rigidly connected to form a structural unit, and then the structural unit is elastically supported as a whole on a drive housing. Examples of such prior art are disclosed by British Patent 368247, French Patent 1287551, German Patent 1057979, and German Patent 4314440.

[0004] Regarding the prior art, reference should also be made to International Publication No. 2004 / 089550, in which a drum, a drive spindle and an electric drive motor are also connected to form a structural unit, which can then be supported as a whole on the drive housing. A casing having an inner wall and an outer wall is arranged around the housing or the machine frame. A space through which a cooling fluid, for example water, can flow is formed between these walls. In this way, the cooling fluid can cool the housing, and the cooling fluid is substantially heated by the electric motor during the operation of the centrifugal rotor. Also, in order to lubricate the bearing, an element connected to the spindle is provided. Since the element rotates together with the spindle in the lubricating oil present in the lubricating oil chamber, a part of the lubricating oil is converted into a lubricating oil mist. The lubricating oil mist lubricates the lower bearing. The lubricating oil mist is further guided through a channel to the inside of the upper bearing and to the suction side of the fan device. Thereby, lubrication of the upper bearing occurs. The remaining lubricating oil mist is pushed back through the gap of the motor. This arrangement is complex and relatively complicated. Also, the lubricating oil mist does not contribute to the cooling of the engine.

[0005] The cooling of known drive devices still seems to require improvement.

[0006] The object of the present invention is to improve the cooling of the drive device of a general separator by simple means.

Summary of the Invention

Means for Solving the Problems

[0007] The present invention solves this object by the subject matter of claim 1. This problem is further solved by the method of claim 16.

[0008] According to claim 1, the separator rotates during operation and comprises a unit having a drum and a drive spindle, and a drive motor configured as an electric motor for rotating the drive spindle, the drive motor having a stator and a rotor. The rotor is arranged on the drive spindle, and the stator is arranged radially spaced from the rotor within a drive housing that does not rotate during operation. The stator has at least one or a plurality of winding heads. At least one chamber is formed on at least one winding head, and a coolant film and / or a coolant bath are formed within the chamber during operation. As a result, this winding head is cooled by the coolant during operation or is cooled during operation.

[0009] According to this statement, one or more chambers can be formed on each of the one or more winding heads.

[0010] In this way, one winding head, or optionally two winding heads, are cooled in a simple manner, and more preferably are directly cooled within a coolant film or a coolant bath formed during operation on one or more outer surfaces. The coolant transports heat away from the winding head.

[0011] Previously, the winding head was surrounded by air. The thermal conductivity of air is 0.0262 W / mK. The thermal conductivity of lubricating oil is, for example, from 0.13 W / mK to 0.15 W / mK. Therefore, the heat transfer to the surrounding medium has already been considerably improved, for example, by a factor of 5. In addition, heat is dissipated more effectively by the rotation or preferably the circulation of the lubricating oil, whereas in the prior art the air surrounding the winding head was essentially stationary.

[0012] The coolant is a free-flowing coolant. Lubricating oil is used as the coolant because lubricating oil must be supplied anyway to lubricate one or more bearings on the centrifuge. One advantage is that due to the additional cooling of the winding head, the motor can be loaded without the motor temperature rising above the allowable value. The cooling is more effective, and thus the output density is high.

[0013] Therefore, it is advantageous for the lubricating oil to be used on the one hand to lubricate one or more bearings of the drive spindle and on the other hand to cool one or more winding heads. The electric drive motor is, for example, an asynchronous motor or a synchronous motor, for example a reluctance motor.

[0014] One advantage of the present invention is that the existing lubricating oil used to lubricate the rolling bearings is now also used to cool the motor or the winding heads. Thus, the machine does not require any further aggregates and no further cooling medium such as water is required. Therefore, the combination of direct heat dissipation from the motor stator (such as cooling fins) and heat dissipation by the flow of lubricating oil to the cooling fins from the winding heads is particularly effective.

[0015] According to a configuration which is advantageous but not essential, the drive motor is preferably arranged completely between the neck bearing and the foot bearing.

[0016] According to an advantageous configuration, one winding head is the upper winding head and the other winding head is the lower winding head, and one or more chambers are formed in the upper winding head and / or the lower winding head. If lubricating oil cooling chambers are formed in each of the two winding heads, both winding heads are effectively and easily cooled.

[0017] For the purpose of effective cooling, each chamber on each winding head is formed as an annular chamber, which is formed at the upper, outer and / or lower part of each winding head, and correspondingly, the upper surface, outer surface and / or lower surface of each winding head is covered by a lubricating oil film during operation and is preferably cooled sufficiently. It is useful if each chamber has an inlet and an outlet, and the outlet can also be configured as an overflow.

[0018] One or both of the chambers are provided to be completely filled with a lubricating oil bath during operation. The inlets and outlets are then configured accordingly and adjusted with a lubricating oil inlet so that one or both of the chambers are filled. In this way, particularly excellent cooling and lubrication are achieved or realized in the areas of the respective chambers.

[0019] To enable the formation of one or more chambers, it is advantageous for an integral or multi-component motor housing to be formed in the drive housing that holds the stator. The chambers can then be formed between the motor housing and the stator, and these elements can be provided as a pre-assembled unit attached to the drive housing.

[0020] According to a particularly preferred configuration, it is provided that the drive housing and / or the motor housing are provided with cooling fins. The drive housing and / or the motor housing have one or more cooling channels into which the lubricating oil flowing out of one or both of the chambers flows. By means of the cooling fins, the thermal energy of the lubricating oil is then dissipated to the surroundings. In this way, all or part of the heat absorbed by the lubricating oil in the chamber is released again into the surroundings by convection. Each chamber of each winding head has an I-shaped, L-shaped, or U-shaped cross-section.

[0021] Next, in an advantageous configuration, it is provided that each chamber is formed between elements and / or parts of the motor housing and each winding head. It may be provided that the pre-assembled drive and rotation system unit has a closed lubrication system circuit.

[0022] Advantageously, according to one variant, the drive spindle is axially penetrated by a hole, the drive spindle is immersed in an oil sump at the bottom of the drive housing, and the lubricating oil is conveyed through the hole of the drive spindle into the area of the neck bearing and / or into the area of the supply line of the chamber in the upper winding head.

[0023] According to a further structurally advantageous configuration, the discharge of lubricating oil from the first chamber by the upper winding head is effected through cooling channels in the drive housing and / or in the motor housing to the second chamber at the lower winding head and is effected so as to return from the second chamber to the lubricating oil reservoir.

[0024] The invention also provides a method for cooling the drive motor of the separator, which consists of the following steps. In particular, according to the invention, providing a separator according to one of the above-described embodiments and filling and flowing lubricating oil through one or more chambers during operation.

[0025] It is more advantageous if air cooling is provided (preferably exclusively) as the cooling system in order to provide a separator that is structurally compact and easily manageable. The air cooling system comprises cooling fins on the outer periphery of the drive housing.

[0026] Finally, it is advantageous but not necessarily so, provided that the rotating system with the drum and the drive spindle is essentially axially supported via a foot bearing in the drive housing. However, other variants with support by a neck bearing can also be implemented in this respect. Further advantageous configurations are disclosed in the remaining dependent claims.

Brief Description of the Drawings

[0027] The invention will be described in more detail below by way of exemplary embodiments with reference to the drawings.

Figure 1

Figure 2

Figure 3a

Figure 3b

DETAILED DESCRIPTION OF THE INVENTION

[0028] Figure 1 shows a separator 1 having a system that does not rotate or is stationary during operation and a system that rotates or is rotating relative to a system that is stationary during operation. In this case, the rotating system and the stationary system each have a plurality of elements.

[0029] The rotating system of the separator includes a drum 2 having a vertical axis of rotation D. This drum 2 is shown only schematically here. The drum 2 can be configured in various ways. Preferably, the drum 2 is configured for continuous operation for continuously clarifying and / or separating a fluid product into one or two liquid phases and optionally a solid phase, particularly in an industrial process. For this purpose, it is desirable for the internal space of the drum 2 to include a stack of separation disks (not visible or shown here). Preferably, a single or double conical drum 2 is arranged here at the vertical upper end of a rotatable drive spindle 3. The drive spindle can be aligned in the vertical direction or, during operation, can be essentially aligned in the vertical direction and has a vertical axis of rotation D.

[0030] The drum 2 has an inlet and at least two outlets for the phases of the product or mixture of substances to be processed that are separated in the centrifugal field.

[0031] The drive spindle 3 is rotatably supported here by a bearing device comprising a neck bearing 4 and a foot bearing 5. The neck bearing 4 is arranged in a bearing housing 6 - preferably arranged elastically supported in the radial direction. In this case, an elastic element such as an elastic ring can be arranged between the inner circumference of the bearing housing 6 and the outer circumference (not shown here) of the neck bearing 4. The bearing housing 6 does not rotate and is thus part of a system that remains stationary during operation.

[0032] The bearing housing 6 is attached to an integral or multi - part motor housing 7, 8. The motor housing is composed of several parts. In particular, the bearing housing 6 has a motor housing covering 7 arranged in the lower motor housing 8.

[0033] The bearing housing 6, and incidentally the motor housing covering 7 and the motor housing 8, can each have an annular flange portion 6a, 7a, and 8a on their outer circumference. These annular flange portions 6a, 7a, 8a can be axially stacked on top of each other. The annular flange portions 6a, 7a, 8a can also be joined to form a unit similar to a module or joined together using, for example, axial screws not shown here. When the annular flange portions 6a, 7a, 8a are joined together, they can be pre - assembled and here form the ring flange portion of a pre - assembled drive and rotation system unit.

[0034] The drive motor 10, which is an electric motor, is arranged in an integrated or multi - part motor housing 8. Incidentally, the foot bearing 5 is formed or arranged in the motor housing 8. The drive motor 10 has a stator 20 and a rotor 21. The stator 20 is fixed here directly or indirectly within or on the drive housing 11. The stator 20 does not rotate during operation. On the other hand, the rotor 21 is connected to the drive spindle 3 in a rotatably fixed state.

[0035] A system with a bearing housing 6, which is accompanied by a motor housing covering 7 and an integral or multi-part motor housing 8, can form a pre-assembled drive and rotation system unit in the form of an exchangeable cassette that is to be mounted as a whole. This pre-assembled drive and rotation system unit is hereinafter also referred to as a short pre-assembled unit. This pre-assembled unit may also include a drum 2. This structure is advantageous in this regard, but in order to implement the invention, it does not necessarily have to be carried out exactly in this way.

[0036] The motor housing 8 is inserted into and held by a drive housing 11. This drive housing 11 is configured in the form of an outer housing that surrounds the motor housing 8. However, the drive housing 11 can also be configured as a frame. The drive housing 11 is fastened to a base such as a hall floor, for example. Cooling fins 12 are formed on the outer periphery of the drive housing 11, enabling the waste heat from the drive system to be easily dissipated or radiated to the surrounding space.

[0037] The drive housing 11 has a ring flange 11a on its inner periphery. The pre-assembled drive and rotation system unit is attached to this ring flange 11a. Here, the ring flange portion on the outside of the pre-assembled drive and rotation system unit can be positioned on the ring flange 11a inside the drive housing 11 or in another configuration suspended below it, as shown in the figure.

[0038] The pre-assembled unit and its annular flange portion are fastened to the annular flange 11a of the drive housing 11 by at least one or more fastening means, particularly one or more screw bolts (not shown here), and it is particularly preferred to be fastened by screwing. Furthermore, a hood 9 can be attached to the drive housing 11, which does not rotate during operation and surrounds the drum 2.

[0039] On the one hand, an air-cooling system can be used to cool the drive unit equipped with the drive motor 10, which is achieved by the cooling fins 12. This is advantageous and simple. It has also been proposed to use liquid cooling as a supplementary or alternative means. The corresponding liquid cooling system is designated below by reference numeral 100. In this liquid cooling system 100, a lubricant circulation system is advantageously used for the liquid cooling of the motor 10. For this purpose, it is advantageous to use a lubricating oil circulation system or at least also use a lubricating oil circulation system, which also serves to lubricate at least one of the bearings 4, 5 with lubricating oil.

[0040] According to a possible configuration according to the invention, the lubricating oil circulation system is constructed as follows. A lubricant supply line is used to supply lubricant to the bearings 4, 5. This lubricating oil supply line is implemented in various ways. For example, the drive spindle 3 can have a hole 101 that axially penetrates the drive spindle 3, and the drive spindle 3 is immersed in an oil sump 102 at the bottom of the drive housing 11 (the upper lubricating oil level is indicated by a dashed line). The lubricating oil is conveyed like a suction pipe through the hole 101 of the drive spindle 3 to the region below the neck bearing 4. Accordingly, the hole 101 in the drive spindle 3 functions here as a lubricant supply line. From the hole 101, the lubricating oil is further guided radially outwards within the rotating system through one or more laterally extending holes 103 that extend radially, and the lubricating oil is guided until it exits from the laterally extending holes 103 of the drive spindle 3 into the stationary annular space outside the drive spindle 3 (see also Fig. 3a).

[0041] The lubricating oil emerging from the drive spindle 3 fills the stationary elements located radially outside the drive spindle 3, in this case filling the motor housing cover ring 7 and / or the motor housing 8. The neck bearing 4 can be lubricated by the lubricating oil mist generated during operation.

[0042] Part of the lubricating oil can further return downward into the lubricating oil reservoir 102 in a chamber extending concentrically with respect to the drive spindle 3. The foot bearing 5 can be arranged in the lubricating oil reservoir and lubricated by the lubricating oil. However, the foot bearing 5 may be located above the lubricating oil reservoir and can be lubricated as the lubricating oil returns to the lubricating oil reservoir.

[0043] According to the present invention, the cooling of the stator 20 fixed particularly in the drive housing is optimized. The stator 20 has an upper winding head 20a, a lower winding head 20b, and a coil pack 20c. The coil pack is configured as a kind of ring-shaped element, and the coil pack is located at the center between the upper winding head 20a and the lower winding head 20b.

[0044] At least one chamber K1, K2 is formed on the stator 20, particularly on the upper winding head and / or the lower winding head 20a, 20b. The chambers K1, K2 are filled with lubricating oil during operation, and at least a part of the outer surface of each winding head 20a, 20b is in a lubricating oil bath or covered with a lubricating oil film during operation. Each chamber K1 is configured to have an inlet and an outlet. The inlet and the outlet are configured such that each chamber K1 and / or K2 is preferably completely filled with lubricating oil during operation.

[0045] Advantageously, one of the chambers K1, K2 can be formed on both the upper winding head 20a and the lower winding head 20b. The chamber K1 and / or the chamber K2 are preferably configured as annular chambers extending radially outside each winding head 20a and / or 20b and optionally above and / or below and around each winding head 20a and / or 20b.

[0046] At least one drain channel (which can branch into several cooling channels) from at least one of the chambers K1, K2 is led through the drive housing and / or the motor housing to the area of the cooling fins 12, and the heat absorbed by the lubricating oil from each chamber K1 and / or K2 can be discharged from the chamber through the surrounding cooling fins.

[0047] In this way, air cooling is used to obtain specific advantages or is used in combination with liquid cooling. In the illustrated embodiment, this is advantageously implemented as follows, but not necessarily so. The motor housing covering 7 is located above the stator 20. The motor housing 8 (which is also preferably annular) is again arranged radially outside the stator 20. This can extend downward to the lubricating oil reservoir 102 in one or more parts.

[0048] The motor housing covering 7 has an annular chamber 71 that opens inward. This annular chamber 71 collects a part of the lubricating oil radiating from the drive spindle 3. Also, the motor housing covering 7 can have an inlet channel 72, and using this inlet channel 72, the lubricating oil is supplied from the annular chamber 71 into the chamber K1, and this chamber K1 is formed radially outward as an annular chamber between the winding head 20a and the adjacent element of the motor housing. Here, these are elements of the motor housing covering 7 and the motor housing 8.

[0049] Chamber K1 is filled with lubricating oil during operation. Chamber K1 is configured as an annular chamber. Further, chamber K1 preferably has a cross-section in the shape of an I, an L, or, if possible, a U. When lubricating oil flows through chamber K1 during operation, chamber K1 is configured (particularly with respect to the volume of chamber K1 and the amount of inflowing oil) such that it is not heated by more than approximately 20°K. In this way, excessive heating in the region surrounding chamber K1 can be very well avoided.

[0050] Figure 3a shows how chamber K1 is filled with lubricating oil passing through channel 72 during operation. This lubricating oil cools the upper winding head 20a on one, two, or here three of the sides of the winding head 20a. In particular, these are the upper, lower, and radially outer sides of the upper winding head 20a.

[0051] An outlet channel 73 emerges from chamber K1. Outlet channel 73 here (optionally upward and then) joins the cooling channel 74 radially outward (or combined), and the cooling channel 74 is guided through the drive housing and / or the motor housing, provided with one or more cooling fins 12, and part or all of the heat absorbed by the lubricating oil in chamber K1 of the upper winding head 20a can be re-radiated via one or more cooling fins 12.

[0052] The cooling channel 74 then joins the inlet channel 75 (which proceeds radially inward here), and this inlet channel 75 opens into a second chamber K2 on the lower winding head 20b. Also, the lower winding head 20b is surrounded by the lubricating oil in this chamber K2 on one, two, or three sides of chamber K2, radially outward and / or upward and / or downward. Chamber K2 can also be configured as an annular chamber. Further, chamber K2 can have a cross-section in the shape of an I, an L, or a U.

[0053] Figure 3b shows how the chamber K2 is filled with lubricating oil by the lubricating oil passing through the channel 75 during operation. This lubricating oil cools the lower winding head 20b on one, two or three of its sides. In particular, these are the upper, lower and radially outer sides of the lower winding head 20b. Also, the chamber K2 between the lower winding head 20b and the motor housing 8 is filled with lubricating oil due to the fact that lubricating oil continues to be supplied from the lubricating oil reservoir into the chamber K1 and provides cooling for the lower winding head 20b.

[0054] In this case, the lubricating oil is discharged downward from the lower chamber K2 through another outlet channel 76 towards the lubricating oil reservoir 102 and can ultimately flow into it. The configuration of the chamber K2, in particular the volume and flow rate of the lubricating oil during operation, should preferably be selected such that the lubricating oil is not heated by more than 20°K or preferably is heated by less than 20°K when flowing through the chamber K2. This is because such a configuration can particularly reliably prevent overheating in the area around this chamber K2.

[0055] In this way, the lubricating oil is defined to flow through the stator 20, in particular through one or both of the winding heads 20a, 20b, and in a more focused manner, which is that the lubricating oil actively cools one or preferably both of the winding heads 20a, 20b by means of a specific lubricating oil flow and film. Further, the winding heads are cooled such that a kind of lubricating oil bath preferably exists in the chambers K1, K2, but the lubricating oil is repeatedly exchanged by the inflowing lubricating oil.

[0056] The two winding heads 20a, 20b have a basic shape with a substantially rectangular cross-section. In this case, the inside of the stator 20 is spaced apart from the drive spindle 3 and the rotor 21 by an annular space. In this region, it is preferably not possible to achieve an auxiliary lubricating oil flow, at least not exceeding the cooling effect exerted on this annular space by the lubricating oil flowing from the neck bearing to the foot bearing.

[0057] On the other hand, on the outer periphery, the upper and / or lower winding heads are surrounded by the drive housing or an element of the drive housing on the drive housing, and the winding heads form one or more chambers K1, K2, in particular annular chambers, on one, two, or preferably three of their sides.

[0058] Here, the motor housing covering 7 arranged above the stator is configured to guide lubricating oil to the first chamber K1 via the channel 72, and the first chamber K1 surrounds the upper winding head on three sides. This chamber K1 is filled with lubricating oil during operation. As soon as the lubricating oil overflows, the overflowed lubricating oil flows through a further channel 74 in the direction of a further chamber K2, and the chamber K2 surrounds the lower winding head 20b on one, two, or three sides. From this lower chamber K2, the outlet channel 76 finally returns to the lubricating oil sump, like a hole or a channel.

[0059] In this way, the lubricating oil passes directly by both winding heads 20a, 20b to cool the winding heads and finally returns to the lubricating oil sump 102. Accordingly, one or more channels and / or chambers K1, K2 are formed between the stator 20 and one or more adjacent elements of the drive housing 11, and these channels and / or chambers K1, K2 include the motor housing covering 7 and the motor housing 8 that are completely or partially filled with lubricating oil during operation, and a flow of lubricating oil is also generated to cool the stator, in particular one or both of its winding heads 20a, 20b, as directly as possible with lubricating oil by flowing directly over at least one surface area of the winding heads 20a, 20b.

[0060] The present invention can be implemented in various ways. This has been advantageously done in FIGS. 1, 3a and 3b. However, in other constructive configurations, of course, it is possible to implement the present invention in different constructive ways. The lubricating oil flows into the annular chambers K1 and K2 or at least a part of the lubricating oil flows out from the drive spindle 3 under the neck bearing.

[0061] Preferably, the lubricating oil is selectively directed to one or both of the winding heads 20a, 20b, and furthermore, it is desirable that one or both of the winding heads 20a, 20b are provided so as to be partially immersed in the lubricating oil bath during operation. The overflow is configured such that the lubricating oil level in the upper chamber K1 always completely surrounds the upper winding head 20a. The immersion helps to dissipate the heat generated by the ohmic losses in the upper winding head 20a. At that time, the overflowed lubricating oil can easily dissipate heat to the surroundings through one or more cooling channels 74 in the drive housing and / or the motor housing or while passing through the cooling fins 12 of the drive housing 11.

[0062] Next, the cooled lubricating oil flows into a similar chamber K2, which surrounds the lower winding head 20b. The outlet from the winding head 20b can be reconfigured so that the lubricating oil level in the container always completely surrounds the winding head. This can be achieved, for example, by an appropriate orifice in the outlet of the container or by an appropriate cross-sectional area of the outlet channel 76.

[0063] In this way, the two winding heads 20a, 20b of the integrated motor are actively cooled by the returning lubricating oil. On the one hand, part of the heat dissipated by the winding head is absorbed and conducted by the flowing lubricating oil, and on the other hand, part of the heat dissipated by the winding head is conducted to the surrounding separator housing by the lubricating oil standing in the chamber around the winding head. For this purpose, the chamber around the winding head needs to be filled with lubricating oil.

Explanation of Symbols

[0064] List of symbols 1 Separator 2 Drum 3 Drive spindle 4 Neck bearing 5 Foot bearing 6 Bearing housing 6a Annular flange part 7 Motor housing covering 7a Annular flange part 71 Annular chamber 72 Inlet channel 73 Outlet channel 74 Cooling channel 75 Inlet channel 76 Outlet channel 8 Motor housing 8a Ring flange part 9 Hood 10 Drive motor 11 Drive housing 11a Ring flange 12 Cooling fins 20 Stator 20a Winding head 20b Winding head 20c Coil pack 21 Rotor 100 Liquid cooling system 101 Hole 102 Lubricating oil sump 103 Transverse hole K1, K2 Chambers D Rotation axis

Claims

1. a. A unit that rotates during operation and has a drum (2) and a drive spindle (3), b. A drive motor (10) configured as an electric motor for rotating the drive spindle, having a stator (20) and a rotor (21), c. The rotor (21) is disposed on the drive spindle (3), and the stator (20) is disposed radially spaced apart from the rotor (21) within a drive housing (11) that does not rotate during operation, d. The stator (20) is in a separator (1) having at least one or a plurality of winding heads (20a, 20b), e. At least one chamber (K1, K2) is formed on at least one of the winding heads (20a, 20b), and a coolant film or coolant bath is formed in the chamber (K1, K2) during operation, and this winding head (20a, 20b) is cooled by the coolant during operation, f. The coolant in each chamber (K1, K2) is a lubricating oil, and the lubricating oil is used on the one hand to lubricate one or more bearings (4, 5) of the drive spindle and on the other hand to cool one or a plurality of winding heads (20a, 20b), g. The one winding head is the upper winding head (20a), the other winding head is the lower winding head (20b), and at least one of the chambers (K1, K2) is formed in the upper and / or lower winding heads (20a, 20b), h. A separator (1) in which one or both chambers (K1, K2) are each completely filled with an oil bath during operation.

2. The separator according to claim 1, wherein each chamber (K1, K2) of each winding head (20a, 20b) is formed as an annular chamber formed on the upper side, outer side and / or lower part of each winding head (20a, 20b), and correspondingly, the upper part, outer surface and / or lower surface of each winding head is partially or completely covered by a lubricating oil film during operation.

3. The separator according to claim 1 or 2, wherein each chamber (K1, K2) has an inlet and an outlet.

4. The separator according to any one of claims 1 to 3, wherein one or more cooling channels (74) are formed in the drive housing (11).

5. The drive housing (11) has cooling fins (12), and one or more cooling channels (74) allow the lubricating oil discharged from one or both chambers (K1, K2) to flow, and dissipate the thermal energy of the lubricating oil to the surroundings through the cooling fins (12). The separator according to any one of claims 1 to 4.

6. At least one chamber (K1, K2) is configured such that when the lubricating oil flows through each chamber (K1, K2) during operation, the lubricating oil is not heated by more than approximately 20°K. The separator according to any one of claims 1 to 5.

7. The separator according to any one of claims 1 to 6, wherein each chamber (K1, K2) is formed between elements and / or sections of the motor housings (7, 8) and each winding head (20a, 20b).

8. The drive spindle (3) is axially penetrated by a hole (101), and the drive spindle (3) is immersed in an oil sump (102) at the lower part of the drive housing (11), and the lubricating oil passes through the hole (101) of the drive spindle (3) to the region of the neck bearing and / or the supply line region of the chamber (K1) in the upper winding head (20a). The separator according to any one of claims 1 to 7.

9. The lubricating oil discharged from the first chamber (K1) in the upper winding head (20a) is directed through the cooling channel (74) to the second chamber (K2) in the lower winding head (20b), and is returned from the second chamber (K2) towards the oil sump (102). The separator according to claim 8.

10. The separator according to any one of Claims 1 to 9, wherein a conical drum (2), which is single or double, is installed at the upper end of a rotatable drive spindle (3).

11. The separator according to any one of Claims 1 to 10, wherein a separation disk stack of a plurality of separation disks is arranged in the drum (2).

12. The separator according to any one of Claims 1 to 11, wherein a pre-assembled drive and rotation system unit (100) constitutes a closed lubrication system circuit.

13. The separator according to any one of Claims 1 to 12, wherein the drive motor is located between a neck bearing (4) and a foot bearing (5).

14. A method for cooling a drive motor (20) of a separator (1) according to one or more of Claims 1 to 13, comprising: A) providing a separator according to any one of Claims 1 to 13; and B) flowing lubricating oil through one or more chambers (K1, K2) during operation.

15. The method according to Claim 14, wherein the lubricating oil flows into at least one chamber (K1, K2) such that the lubricating oil is heated by less than 20 °K when flowing through each chamber (K1, K2).

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