Active drive unit with centrifugal unit and its solid-liquid separation equipment

Abstract

The present invention relates to an active drive unit with a centrifugal unit and a direct drive solid-liquid separation device having the active drive unit. The active drive unit with electrical insulation measures is characterized by including at least one rotor unit and a rotor unit support member composed of a centrifugal unit, a spacer portion, and at least one rotor unit support portion. The solid-liquid separation device includes an active drive unit with a centrifugal unit, a liquid collection and discharge unit, a rotary support unit, and a stator assembly including at least one stator unit. The advantages of the present invention are as follows: The device designs the centrifugal unit for performing the solid-liquid separation task and the active drive unit as an integrated structure, which is convenient for manufacturing each component and assembling the whole unit. The device has high safety, operates quietly and stably, is easy to maintain and clean and verify, and can overcome various defects or drawbacks existing in the existing solid-liquid separation devices.

Description

[0001] This application is a divisional application of the application with the filing date of February 28, 2017, application number CN201710118952.7, publication number CN106655619 A, and invention title "Active drive unit with centrifugal unit and its solid-liquid separation equipment". Technical Field

[0002] The present invention relates to an active drive unit with a centrifugal unit and a direct-drive solid-liquid separation equipment with the active drive unit. Its final product form is a small solid-liquid mixture centrifugal separation equipment, belonging to the field of centrifuges. Background Art

[0003] During the laboratory small-scale and pilot-scale research processes, the most commonly used solid-liquid separation equipment mainly includes the combination of a Buchner funnel and a suction flask, and centrifuges of various specifications. Among them, the combination of a Buchner funnel and a suction flask is only suitable for laboratory small-scale research. In order to simulate the actual situation in production and provide necessary centrifugal separation operation data for production, the centrifuge is more recommended.

[0004] Currently, the commonly used centrifuges are all composed of a drive device (mainly a motor) and a solid-liquid separation device (mainly a liquid collection and discharge chamber and a centrifugal unit) that are separately placed and then assembled. Such equipment still has various defects or drawbacks, such as being too complex and heavy, having too much noise and vibration, having a complex manufacturing process, being inconvenient for maintenance, and being difficult for equipment cleaning validation, etc., and cannot fully meet the need for complete separation of solid-liquid mixtures in laboratory small-scale and pilot-scale tests. Summary of the Invention

[0005] Object of the Invention:

[0006] The object of the present invention is to provide an active drive unit with a centrifugal unit and a direct-drive solid-liquid separation equipment with the active drive unit. This equipment can overcome various defects or drawbacks existing in the existing centrifuges or solid-liquid separators, and better meet the need for complete separation of solid-liquid mixtures in laboratory small-scale and pilot-scale tests.

[0007] Technical Solution:

[0008] In order to overcome various defects or drawbacks existing in the existing solid-liquid mixture separation equipment, the present invention provides a direct-drive solid-liquid separation equipment with an integrated structural design of an active drive unit and a centrifugal unit. The active drive unit includes:

[0009] At least one rotor unit, and the rotor unit makes the active drive unit perform a rotational movement around the motor shaft center line through the rotational force generated by the electromagnetic interaction with the adapted stator unit;

[0010] A centrifugal unit, which includes a centrifugal drum with centrifugal through holes on its peripheral wall and a centrifugal cover with a feeding hole in the center;

[0011] A spacer that separates the active drive unit into an upper centrifugal unit and a lower rotor unit support while controlling the flow direction of a target substance and its components located inside and / or outside the centrifugal unit, and the spacer closes the bottom of the centrifugal unit;

[0012] At least one rotor unit support for carrying the rotor unit; and

[0013] One of the shaft connection methods (A) to (C), wherein the active drive unit is related to the motor shaft by any one of the following shaft connection methods (A) to (C):

[0014] (A) Through a motor shaft mounting hole located at the center of the spacer;

[0015] (B) Through a mounting bracket that is fixedly connected to the spacer and the motor shaft, or is an integral structure with the spacer and / or the motor shaft;

[0016] (C) The motor shaft and the active drive unit are an integral structure;

[0017] Wherein the centrifugal unit, the spacer, and the rotor unit support together form a rotor unit support member.

[0018] According to the active drive unit of the present invention, between the spacer and the rotor unit support, especially between the outermost rotor unit supports, they together form an integral structure with a -shaped longitudinal section, and the -shaped structure includes a metal structure part derived from at least one metal component and / or a molded structure part derived from a polymer material by molding. The molded part formed by the polymer material by molding gives the rotor unit support member or the active drive unit a complete structure and function.

[0019] Specifically, the centrifugal unit or its components, The -shaped structure and the electrical insulation measures (I) to (III) together ensure the success of the active drive unit of the present invention.

[0020] Specifically, Example 3 (Figure 3) is the shaft connection method (A), Example 1 (Figure 1) is the shaft connection method (B), Example 2 (Figure 2) and Example 4 (Figure 4) are the shaft connection method (C). The rotor units are shown as 104 and 106 in Figure 1. The centrifugal unit includes a centrifugal through-hole (111), a centrifugal drum (110), a feeding hole, and a centrifugal cover (304). The spacer is shown as 207 in Figure 2. The rotor unit supports are shown as the structures of 116 and 117 in Figures 1 to 4 but do not include the rotor units.

[0021] Specifically, the mounting bracket (103) in Embodiment 1 (Figure 1) is fixedly connected to the spacer through the electrically insulating mounting bracket mounting holes (101, formed after injection molding of the injection-molded insulating holes (115)). At the same time, it is fixedly connected to the motor shaft through the motor shaft hole. By simple modification, the mounting bracket and the motor shaft can be made into an integral structure. Embodiment 2 (Figure 2) specifically shows the case where the mounting bracket, the spacer, and the motor shaft are an integral structure, and also indirectly shows the method of making the mounting bracket and the motor shaft into an integral structure.

[0022] Specifically, the type structure of the integral structure includes a radial part and an axial part. Preferably, the radial part and / or axial part of the type structure includes a metal structure part derived from at least one metal component and / or a molded structure part derived from a polymer material by molding. More preferably, the metal structure part included in the radial part and / or axial part of the type structure is derived from the metal component of the integral structure. The type structure is preferably used to form a seal with a sealing element and / or to provide a fixed connection structure (such as the injection-molded insulating hole 115) for a component having at least a centrifugal unit. The seal prevents leakage of the target substance and its components.

[0023] Specifically, generally speaking, the structural strength of various materials is in the order of: metal material > metal material + polymer material > polymer material. The type structure, as the part in the active drive unit that bears the strongest force, the combination of the integral type structure and the metal component of the integral structure can not only meet the various strength requirements of the equipment to the greatest extent, but also be particularly convenient for providing a fixed connection structure for a component having at least a centrifugal unit, especially the second metal component, and / or a structure for releasing the fixed connection (Embodiment 4). It can also minimize the types and quantities of components and facilitate the manufacture of active drive units of various structures and specifications.

[0024] Specifically, in Embodiments 1 to 4 (Figures 1 to 4), the spacer closing the bottom of the centrifugal unit and the outermost rotor unit support part (116) together form a structure with a type cross-section ( Figure 2A at the position shown as 207 in ). The type structure in Embodiments 1 to 3 includes a metal structure part derived from the second metal component of the integral structure. The

[0025] According to the active drive unit of the present invention, the active drive unit is preferably fixed to the bottom of the centrifugal liquid collection unit by means of a rotary support unit and a nut that abuts against the rear bearing and is screwed onto the motor shaft.

[0026] Specifically, the structures at the tail ends of the motor shafts in Embodiment 2 (Figure 2) and Embodiment 4 (Figure 4) are particularly suitable for this installation method.

[0027] According to the active drive unit of the present invention, the components associated with the shaft are preferably electrically insulated from the rest of the active drive unit, and the "components associated with the shaft" include, but are not limited to, the first metal component.

[0028] Specifically, in Embodiment 2 (Figure 2) and Embodiment 3 (Figure 3), the first metal component associated with the shaft and the second metal component are electrically insulated from each other by being molded with a polymer material. In Embodiment 4 (Figure 4), the polymer material molded part includes a first metal component that non-electrically supports the rotor unit, and this injection molded part is electrically insulated from the second metal component having at least a centrifugal unit through an injection insulation hole (115).

[0029] According to the active drive unit or the solid-liquid separation device described in the present invention, in order to ensure electrical insulation between the rotor unit and the stator unit in any case, and more importantly, to ensure electrical insulation between the rotor unit and the motor shaft, especially to ensure electrical insulation between the target substance and its components and the active drive unit, thereby improving the safety of the device. As an equivalent replacement for the individual and combined use methods of the following three electrical insulation measures (I) to (III), at least the component containing the rotor unit in the active drive unit of the present invention, the surface of this component facing the air gap and / or the surface adjacent to the rotor unit support and not facing the air gap is electrically insulated by a non-conductive insulating material layer. The at least component containing the rotor unit includes, but is not limited to, one or both of the rotor unit and the metal component that non-electrically supports the rotor unit.

[0030] According to the active drive unit or the solid-liquid separation device described in the present invention, the active drive unit or the solid-liquid separation device has at least one of the following three electrical insulation measures (I) to (III):

[0031] (I) At least the surface of the rotor unit facing the air gap is coated with a non-conductive insulating material layer after being treated with a suitable treatment process;

[0032] (II) The rotor unit and each part of the adjacent rotor unit support are electrically insulated from each other by a non-conductive insulating material layer;

[0033] (III) The metal component that non - electrically supports the rotor unit is electrically insulated from the rest of the rotor unit support and from the target substance and its components located inside and / or outside the centrifugal unit by a layer of non - conductive insulating material.

[0034] Specifically, in the individual and combined use of the three electrical insulation measures (I) - (III), it is preferred that at least the non - air - gap - facing surfaces of the components containing the rotor unit are electrically insulated from the rest of the active drive unit, and more preferably, both the air - gap - facing surfaces and the non - air - gap - facing surfaces of the components containing the rotor unit are electrically insulated from the rest of the active drive unit.

[0035] Specifically, the rotor unit with a radial air - gap flux is generally of a cylindrical structure, and the rotor unit with an axial air - gap flux is generally of a disc - like structure. The surfaces of both types of rotor units include an upper surface, a lower surface, an inner surface, and an outer surface. These four surfaces can be more simply divided into air - gap - facing surfaces and non - air - gap - facing surfaces (the surfaces adjacent to the rotor unit support). The electrical insulation measure (I) mainly targets the air - gap - facing surfaces, the electrical insulation measures (II) and (III) mainly target the non - air - gap - facing surfaces, and the various combinations of (I) - (III) target the air - gap - facing surfaces and / or non - air - gap - facing surfaces. The metal component that non - electrically supports the rotor unit means that there is no electrical insulation between the rotor unit and the metal component, and the metal component that non - electrically supports the rotor unit also includes the air - gap - facing surfaces and the non - air - gap - facing surfaces.

[0036] Specifically, in Example 1 (Figure 1) and Example 3 (Figure 3), the electrical insulation measure (II) is adopted. In Example 4 (Figure 4), the electrical insulation measure (III) is adopted. In Example 2 (Figure 2), the electrical insulation measures (I) and (II) are adopted. Comparing the outer and inner reinforcing ribs of the rotor unit support on the left and right sides between the marking lines 201 and 203 in Figure 2B with the positions shown by D and E in Figure 1B it can be seen that Figure 2B there are gaps between the inner and outer rotor units and the inner and outer reinforcing ribs, and they do not contact each other. According to the positional relationship between the components in Figure 2B after injection molding, the obtained active drive unit has its rotor unit electrically insulated from the metal component.

[0037] According to the active drive unit of the present invention, the target substance and its respective components refer to the mixture to be centrifugally separated and the respective components constituting the mixture to be centrifugally separated. The insulating material layer includes, but is not limited to, an electrically insulating polymer material layer, a non-conductive ceramic layer composed of metal oxides on the surface of the first metal component and / or the second metal component, an electrical insulating skeleton for the iron core, and / or an electrical insulating coating. The selection of the electrical insulation measures is determined according to the structure of the rotor unit, the structure of the first metal component or the second metal component, the connection mode of the first metal component and the second metal component, the structure of the centrifugal unit, and the structure of the active drive unit, while taking the convenience of production and the reduction of product cost as the criterion.

[0038] Specifically, among the three electrical insulation measures (I), (II), and (III), the second one of the preferred number (II) is selected. For this electrical insulation measure, it is equivalent to the rotor unit being electrically insulated and isolated by a non-conductive insulating material layer from the first metal component and / or the second metal component. This electrical insulation measure can expand the selectable range of the structure of the first metal component or the second metal component, the selectable range of the connection mode of the first metal component and the second metal component, or the selectable range of the structure of the active drive unit. Therefore, it is the first choice.

[0039] According to the active drive unit of the present invention, according to the construction method of the rotor unit, the rotor unit is preferably any one of the following four structures (7) to (10):

[0040] (7) A combination of a conductive winding or an iron core and a conductive winding;

[0041] (8) A combination of an iron core and a permanent magnet;

[0042] (9) A combination of rotor bars, end rings, and an iron core;

[0043] (10) A combination of a permanent magnet, rotor bars, end rings, and an iron core;

[0044] Among them, the permanent magnet includes, but is not limited to, any one of neodymium iron boron magnets, samarium cobalt magnets, alnico magnets, ferrite magnets, and plastic magnets, or a combination of two or more of them. The rotor unit structure is preferably composed of a permanent magnet and an iron core, and the combination of rotor bars, end rings, and an iron core is the second choice. Of course, it can also be composed of an iron core and its energizable conductor winding, or other rotor unit structures.

[0045] The active drive unit according to the present invention, the active drive unit having two or more rotor units (116, 117 in FIGS. 1 and 2), the rotor units of which are axially arrayed or radially juxtaposed with the center line of the motor shaft as the axis, the rotor units of the axial array having the same specifications, and the rotor units of the radial juxtaposition having different specifications (the radii of the rotor units are different, and the radius of the outer rotor unit is greater than the radius of the inner rotor unit).

[0046] The active drive unit according to the present invention, according to the relative arrangement of the stator unit and the rotor unit, the rotor unit preferably selects any one of the following four radial air-gap flux structures (1) to (4):

[0047] (1) Outer stator single inner rotor structure with radial air-gap flux;

[0048] (2) Inner stator single outer rotor structure with radial air-gap flux;

[0049] (3) Inner and outer double stator intermediate rotor structure with radial air-gap flux;

[0050] (4) Double rotor structure combining intermediate stator with inner rotor and outer rotor with radial air-gap flux.

[0051] The active drive unit according to the present invention, according to the relative arrangement of the stator unit and the rotor unit, the rotor unit preferably selects any one of the following two axial air-gap flux structures (5) to (6):

[0052] (5) Single stator single rotor structure with axial air-gap flux;

[0053] (6) Intermediate stator upper and lower rotor structure with axial air-gap flux.

[0054] Specifically, the rotor unit of the motor rotor with the radial air-gap flux structure preferably selects an inner rotor or an outer rotor (116 in FIGS. 3 and 4), or a double rotor structure combining an inner rotor and an outer rotor. The double rotor structure includes two cases where the outer side is an outer rotor and the inner side is an inner rotor (116, 117 in FIGS. 1 and 2) and the outer side is an inner rotor and the inner side is an outer rotor; the motor rotor with the axial air-gap flux structure preferably selects a single stator single rotor or a disc-type motor with an intermediate stator upper and lower rotor structure (commonly known as a disc motor).

[0055] Specifically, the rotor unit particularly preferably selects a double rotor structure combining an intermediate stator with an inner rotor and an outer rotor with radial air-gap flux. This structural form can increase its balance when the motor rotor is in a centrifugal running state, and at the same time, accessories meeting the parameter requirements can be selected from the direct drive motors for washing machines in the market, reducing the product cost.

[0056] The active drive unit according to the present invention, the active drive unit includes at least one of the following (11) to (13):

[0057] (11) A first metal component located at the inner spacer position of the active drive unit;

[0058] (12) A second metal component located at the outer centrifugal unit position of the active drive unit;

[0059] (13) A molded component made of a polymer material that gives the active drive unit a complete structure and function.

[0060] Specifically, the active drive unit includes any one, any two, or all three of a first metal component, a second metal component, and a molded component molded from a polymer material with respect to the metal components.

[0061] Specifically, between the rotor unit, the first metal component, the second metal component, and the molded component molded from a polymer material, any two, any three, or all four are structurally adapted to each other so that the rotor unit support or the active drive unit has a complete structure and function.

[0062] The active drive unit according to the present invention, the first metal component includes, but is not limited to, any one of the following seven structures selected from (14) to (20):

[0063] (14) Splines of various structures;

[0064] (15) Motor shafts of various structures;

[0065] (16) A rotor insert having an inner shaft mounting structure and an outer connection structure, the rotor insert having the function of a mounting bracket;

[0066] (17) A first metal component having part or all of the spacer;

[0067] (18) A first metal component having a spacer and a rotor unit support;

[0068] (19) A first metal component having a spacer and a centrifugal drum;

[0069] (20) A first metal component having a spacer, a centrifugal drum, and a centrifugal cover.

[0070] The active drive unit according to the present invention, the second metal component includes, but is not limited to, any one of the following five structures selected from (21) to (27):

[0071] (21) A second metal component having a centrifugal drum and a centrifugal cover;

[0072] (22) The second metal component having a centrifugal drum and a rotor unit support part;

[0073] (23) The second metal component having a centrifugal drum, a centrifugal cover and a rotor unit support part;

[0074] (24) The second metal component having a centrifugal drum, part or all of the spacer parts and a rotor unit support part;

[0075] (25) The second metal component having a centrifugal drum, part or all of the spacer parts;

[0076] (26) The second metal component having a centrifugal drum, a centrifugal cover and part or all of the spacer parts;

[0077] (27) The second metal component having a centrifugal drum, a centrifugal cover, part or all of the spacer parts and a rotor unit support part.

[0078] Specifically, the motor shafts of various structures in the above (15) preferably refer to the case where the rotor insert and the motor shaft are of an integral structure.

[0079] Specifically, generally, the first metal component and the second metal component described in the present invention are not strictly distinguished. When there is only one kind of metal component in the active driving unit, this distinction is meaningless. In most cases, this metal component can be regarded as both the first metal component and the second metal component. Only when the active driving unit has two kinds of metal components, in order to show the difference, the metal component associated with the shaft at the inner spacer position of the rotor unit support is regarded as the first metal component, and the metal component at the outer centrifugal unit position of the rotor unit support is regarded as the second metal component.

[0080] Specifically, the rotor insert including but not limited to the above (16) (the first metal component shown as 202 in Embodiment 2 and FIG. 2) can independently realize the function of the mounting bracket in Embodiment 1, and thus can be used as a mounting bracket or further manufactured into a mounting bracket integrated with the motor shaft. This ingenious design of the first metal component enables it to be widely used in the active driving units with shaft connection methods (A), (B), and (C), and through Embodiment 2, the shaft connection methods (A), (B), and (C) are organically connected together. At the same time, it is also convenient to manufacture active driving units with different structures and specifications, reducing production costs.

[0081] Specifically, including but not limited to the above (14) to (20) and the first metal components in Embodiments 1 to 4, they can be separately combined with the rotor unit and molded with polymer materials into an active drive unit. The second metal components in the above (21) to (27) and Embodiments 1 to 4 can also be separately combined with the rotor unit and molded with polymer materials into an active drive unit. The first metal component and the second metal component that are structurally adapted to each other can also be combined with the rotor unit and molded with polymer materials into an active drive unit. Since a device cannot have two centrifugal units simultaneously, the first metal component with a centrifugal drum and the second metal component with a centrifugal drum cannot be used in combination.

[0082] Specifically, in theory, the first metal components including but not limited to the above (14), (16) to (20) and in Embodiments 1 to 4 can all be used as the second metal component, as long as the motor shaft hole is not made during manufacturing or is closed with polymer materials when molded into an active drive unit. However, it is difficult for the second metal component to be directly used as the first metal component due to the absence of a motor shaft hole.

[0083] Specifically, Embodiments 2 and 3 can be very easily transformed into Embodiment 4 with only minor changes. The second metal component in Figure 1 can be slightly processed and combined with the first metal components in Figures 2 and 3. The first and second metal components in Figures 2 and 3 can be combined and used as in Embodiments 2 and 3, or cross - combined, or separately combined with the rotor unit. Therefore, the first and second metal components, rotor unit, and polymer material components in Figures 1 to 4 can be combined to create various structures of active drive units and their embodiments. The preferred Embodiments 1 to 4 only show the most representative structures of the first and / or second metal components and the most representative combination methods between them.

[0084] Specifically, the first and second metal components between the above (18) to (27) can be transformed into each other through simple structural changes. The second metal component of Embodiment 4 is as described in the above (21), the second metal components in Embodiments 1 to 3 are as described in the above (24) to (27), the first metal component of Embodiment 4 is as described in the above (18), the first metal component of Embodiment 2 is as described in the above (16), and the first metal component of Embodiment 3 is as described in the above (14).

[0085] Specifically, for the first metal component or the second metal component in the present invention, preferably, both the centrifugal cover (304) and the centrifugal drum (110) are integrally formed, or the centrifugal drum and the rotor unit support part are integrally formed, or the spacer part and the rotor unit support part are integrally formed, or the centrifugal drum and the spacer part are integrally formed, or the centrifugal cover, the centrifugal drum and the rotor unit support part are integrally formed, or the centrifugal drum, the spacer part and the rotor unit support part are integrally formed, or the centrifugal cover, the centrifugal drum, the spacer part and the rotor unit support part are preferably integrally formed. The integral forming process includes but is not limited to at least one of molding, cutting, bending, and stamping processes, which facilitates manufacturing and reduces costs.

[0086] For the active drive unit according to the present invention, the non - centrifugal unit part of the first and / or second metal components is preferably made of the same material as the rotor unit iron core and manufactured by appropriate manufacturing processes, which can reduce manufacturing processes and costs. The appropriate manufacturing processes preferably include but are not limited to at least one of molding, cutting, bending, and stamping processes.

[0087] For the active drive unit according to the present invention, for the first metal component and / or the second metal component manufactured by an appropriate manufacturing process (the first manufacturing process), preferably, the corresponding spacer part and / or the position of the rotor unit support part of the component are processed by re - using an appropriate manufacturing process (the second manufacturing process) to form at least one of the following structures (28) - (32):

[0088] (28) Spacer part reinforcing ribs, which include but are not limited to being distributed radially and / or circumferentially;

[0089] (29) Rotor unit support parts, which include but are not limited to cylindrical, tile - shaped, strip - shaped, or column - shaped structures spaced circumferentially;

[0090] (30) Rotor unit support part reinforcing ribs, which include but are not limited to cylindrical, tile - shaped, strip - shaped, or column - shaped structures spaced circumferentially;

[0091] (31) Centrifugal cover, which is preferably made from a centrifugal cover body;

[0092] (32) Fixed connection structure of the component having at least a centrifugal unit.

[0093] For the active drive unit according to the present invention, the appropriate manufacturing processes (the first manufacturing process, the second manufacturing process) include but are not limited to at least one of molding, cutting, bending, and blanking processes, and the reinforcing ribs can also serve as fixing structures.

[0094] Specifically, the second manufacturing process includes both further processing of the first and / or second metal components by means of metal machining and further processing by means of polymer material molding. The reinforcing ribs formed thereby are classified according to direction into axially outer reinforcing ribs (107), axially inner reinforcing ribs (109), and reinforcing ribs (301) parallel to the motor shaft direction, and radially inner reinforcing ribs (302), radially reinforcing ribs (305), radially outer reinforcing ribs (401), and circumferential reinforcing ribs (306) perpendicular to the motor shaft direction. According to the material, they are classified into metal material reinforcing ribs (107, 109, 301, 302, 401) and polymer material reinforcing ribs (305, 306). According to the location, they are classified into spacer portion reinforcing ribs (302, 305, 306, 401) and rotor unit support portion reinforcing ribs (107, 109, 301). The latter includes various manifestations of the former two. After being processed by the second manufacturing process, a cylindrical rotor unit support portion with a continuous peripheral wall, a centrifugal cover (such as obtained by processing the centrifugal cover precursor 206 in Embodiment 2), and a fixed connection structure of a component including at least a centrifugal unit (including but not limited to that shown as 402 in Embodiment 4) can also be formed.

[0095] Under normal circumstances, the rotor unit support portion or the rotor unit support portion reinforcing rib of the metal component is a cylindrical structure with a continuous peripheral wall. In particular, most of the metal components manufactured by the first manufacturing process are like this. This structure is suitable for the motor rotor of a radial air-gap flux structure. However, if the rotor unit support portion is a full-metal structure, it will significantly increase the weight of the entire active drive unit. To reduce the weight of the active drive unit, the use of polymer materials with a relatively small specific gravity should be increased as much as possible. The plurality of tile-shaped, strip-shaped, or column-shaped structures distributed at intervals in the circumferential direction obtained by processing the first metal component or the second metal component can serve as both the rotor unit support portion and the metal reinforcing rib of the rotor unit support portion. After positioning the rotor unit thereon and injection molding it into an active drive unit, the weight of the active drive unit can be correspondingly reduced. At the same time, the gaps between the tile-shaped or strip-shaped structures can serve as the card slots for fixing the rotor unit before or after injection molding. It is particularly suitable for the manufacture of an active drive unit with a rotor unit having certain structures (such as a combination of rotor bars, end rings, and iron cores).

[0096] Specifically (FIG. 1, FIG. 2), by cutting the spacer portion of the second metal component integrally molded with the centrifugal drum and bending the cut piece, the axially outer reinforcing rib (107) and the axially inner reinforcing rib (109) of the rotor unit support portion in a substantially tile shape are formed;

[0097] Specifically (Figure 3), by cutting the position of the rotor unit support part of the second metal part integrally molded with the centrifugal drum and bending the cut piece, a tile-shaped rotor unit support part reinforcing rib (301) and an inner radial reinforcing rib (302) of the spacer part are formed;

[0098] Specifically (Figure 4), by cutting the position of the rotor unit support part of the first metal part integrally molded with the spacer part and bending the cut piece, a tile-shaped rotor unit support part reinforcing rib (301) and an outer radial reinforcing rib (401) of the spacer part are formed.

[0099] According to the active drive unit of the present invention, preferably, the centrifugal cover and the centrifugal drum are of an integral structure. More preferably, after manufacturing and forming a part at least including the centrifugal cover, it is assembled with other parts to form the active drive unit. The "part at least including the centrifugal cover" includes, but is not limited to, one of the centrifugal cover and a part having at least a centrifugal unit. The other parts include, but are not limited to, one of the first metal part, the second metal part, and a molded part at least including a molded structure and a rotor unit.

[0100] According to the active drive unit of the present invention, in further detail, for the first or second metal part having a centrifugal drum, the production of its centrifugal cover includes, but is not limited to, any one of the following four processes (33) to (36):

[0101] (33) Molded with a polymer material and then assembled to the first or second metal part;

[0102] (34) Molded integrally with the centrifugal drum;

[0103] (35) Treat the top open end of the first or second metal part without a centrifugal through hole by using a manufacturing process including at least a necking process with a necking machine to form a centrifugal cover with a central feeding hole;

[0104] (36) Fix and connect the centrifugal cover to the first or second metal part with a centrifugal drum through a curling / stitching process. The stitching process preferably adopts a stamping connection forming method.

[0105] Specifically, in Example 1 (Figure 1), the centrifuge cover is manufactured in the manner of the above (33), in Example 4 (Figure 4), the centrifuge cover is manufactured in the manner of the above (34), in Example 2 (Figure 2), the centrifuge cover is manufactured in the manner of the above (35), and in Example 3 (Figure 3), the centrifuge cover is manufactured in the manner of the above (36). Among them, (33) and (36) are respectively assembling the manufactured centrifuge cover or the component with at least a centrifugal unit with other components, and the other components include but are not limited to one of the first metal component, the second metal component, and the injection molded part containing a motor shaft hole. Among them, the centrifuge cover in (34) and (35) is an integral structure with the centrifuge drum, and the specific manufacturing method of the centrifuge cover is selected according to the structure of the first metal component or the second metal component and the manufacturing material of the centrifuge drum, with the criterion of reducing processes and production costs.

[0106] According to the active drive unit described in the present invention, manufacturing the centrifuge cover using the above methods (33) to (36) can facilitate the manufacturing of the first metal component and / or the second metal component, facilitate the molded connection of the first metal component and the second metal component, or facilitate the first metal component and the second metal component to be molded into an active drive unit with a complete structure and function after being fixedly connected. Among them, the curling / stitching process is particularly suitable for the fixed connection between the metal centrifuge cover and the metal centrifuge drum.

[0107] According to the active drive unit described in the present invention, the first metal component and / or the second metal component manufactured and formed through appropriate manufacturing processes have structures (referred to as spacer strengthening structures and / or connection structures) that are centered on the motor shaft center line and are spaced apart at the spacer position for enhancing structural strength and / or for connection. This structure includes at least one of the following four structures (37) to (40):

[0108] (37) Grooves or chutes;

[0109] (38) Through holes or snap holes;

[0110] (39) Snap connection structures or locking connection structures:

[0111] (40) Protrusions or card-shaped protrusions;

[0112] The distribution methods of the above structures (37) to (40) for enhancing structural strength and / or for connection are selected from at least one of the following two methods (41) to (42):

[0113] (41) Circumferentially and radially;

[0114] (42) Circumferentially and axially;

[0115] The structures of (37)-(40) above are preferably used to enhance the structural strength of the active drive unit against the destructive effect of centrifugal force, or are preferably used for the fixed connection or molded connection between the first metal component and the second metal component, and more preferably are used for both enhancement and connection simultaneously.

[0116] Specifically, the structures of (37)-(40) include, but are not limited to, the spacer enhancement and / or connection structures located on the first metal component and / or the second metal component, and the spacer enhancement and / or connection structures formed by adjacent spacer ribs and / or rotor unit support ribs.

[0117] Specifically, for the first metal component and the second metal component formed by appropriate manufacturing processes, the grooves or chucks, through holes or snap holes, snap connection structures or locking connection structures, protrusions or card-shaped protrusion connection structures for achieving fixed connection between their adjacent components are preferably formed by processing the corresponding components using appropriate manufacturing processes. The appropriate manufacturing processes include, but are not limited to, at least one of the manufacturing processes such as molding process, cutting process, bending process, and stamping process. The "corresponding components" are the first metal component, the second metal component, and the centrifugal cover.

[0118] For the active drive unit according to the present invention, in the active drive unit having both the first metal component and the second metal component, when observed from the axial direction, the parts of the first metal component and the second metal component having the structures of (37)-(40) above have at least one of the four states of overlap, intersection, confrontation, and interlacing in the radial direction. The first metal component and the second metal component are fixedly connected in a non-electrically insulated or electrically insulated manner, or are molded and connected by a polymer material to be electrically insulated and isolated. The fixed connection methods include, but are not limited to, any one of welding, fusion welding, clamping, press fitting, plugging, interference connection, bolt connection, and fastener connection, or the combination of two or more of them. An electrically insulated connection method is preferred.

[0119] Specifically, the "overlap state" is the connection state between the first metal component and the second metal component (i.e., the centrifugal unit) connected by the fixed through hole (403) and the fixed screw (404) as shown in Figure 4. The "intersection state" is divided into intersection contact and non-intersection contact. Similar to the connection state between the motor shaft and the mounting bracket in Figure 1, and the connection states between the motor shaft and the first metal component in Figures 2 and 4 are intersection contact states. The "confrontation state" is the state where the chucks (204) of the first metal component and the second metal component face each other and the card-shaped protrusions (205) face each other as shown in Figure 2. The "interlacing state" is similar to a variant of the "confrontation state", such as the state between the spline keyway of the first metal component and the groove of the second metal component (located between the adjacent radial inner ribs (302)) as shown in Figure 3.

[0120] Specifically, the first metal component and the second metal component in FIG. 4 (i.e., the component having at least a centrifugal unit) are fixedly connected in an electrically insulated manner, and the first metal component and the second metal component in FIGS. 2 and 3 are molded and connected by a polymer material to be electrically insulated and isolated.

[0121] For the active drive unit according to the present invention, to further enhance the structural strength of the active drive unit or the active drive unit described in the present invention and prevent potential insecurity caused by the fracture at the polymer material connection of the first metal component and the second metal component, the preferred connection method of the first metal component and the second metal component in the present invention is snap connection or plug connection. At the same time, it is preferred to mold and fill the connection gap between the first and second metal components with a polymer material to electrically isolate the first metal component and the second metal component.

[0122] Specifically, the active drive unit or the active drive unit has at least one of the following three structures described in (43) to (45) of "Even More Specifically":

[0123] (43) Even more specifically, one of the connection arms of the first metal component and the second metal component has an axially extending axial protrusion, and the other corresponding one has a jack and / or a card slot for inserting the axial protrusion. Preferably, the height of the axial protrusion is greater than the height of the jack and / or the card slot to facilitate the production of a through hole and / or a card slot located on the axial protrusion.

[0124] (44) Even more specifically, one of the connection arms of the first metal component and the second metal component has a groove and / or a card slot formed by at least two axially extending axial protrusions, and the other corresponding one has a connection arm generally in a "T" shape that snaps into the aforementioned groove.

[0125] (45) Even more specifically, at least one of the through holes, grooves, and card slots that penetrate in the thickness direction is provided on the radial protrusion, connection arm, and axial protrusion of the first metal component and the second metal component, and the polymer material is molded and filled into the through hole, groove, or card slot.

[0126] For the active drive unit according to the present invention, the upper side and / or the lower side of the spacer portion has a radial reinforcing rib (305) and / or a circumferential reinforcing rib (306) for enhancing the structural strength of the active drive unit. The radial and / or circumferential reinforcing ribs are preferably formed when the active drive unit is molded with a polymer material to have a complete structure and function.

[0127] According to the present invention, the manufacturing of the active drive unit includes but is not limited to any one of the following processes (46) to (48):

[0128] (46) A process of assembling and / or molding a component formed by manufacturing and assembling any one, any two, or all three of a centrifugal unit, a spacer, and a rotor unit support part together with a rotor unit into an active drive unit through appropriate manufacturing processes;

[0129] (47) A process of molding any one, any two, or all three of a first metal component, a second metal component, and a rotor unit formed by appropriate manufacturing processes together into an active drive unit;

[0130] (48) A process of directly placing a rotor unit in a mold and molding it into an active drive unit;

[0131] Specifically, the appropriate manufacturing processes in the above (46) to (48) preferably include, but are not limited to, at least one manufacturing process among molding, cutting, bending, and stamping.

[0132] Specifically, it is preferably to place a rotor unit and a metal spline in a mold and mold them into an active drive unit with a polymer material. More preferably, the rotor unit is molded together with a first metal component and / or a second metal component into an active drive unit. Particularly preferably, a fixed connection is made between a component formed by molding the rotor unit together with a first metal component having a motor shaft hole and a component having at least a centrifugal unit. Very preferably, in (48), the rotor unit is directly molded with a polymer material into an active drive unit for use with a mounting bracket.

[0133] According to the present invention, the solid-liquid separation device at least includes:

[0134] A stator assembly, the stator assembly includes at least one stator unit adapted to a rotor unit, and the stator unit and the rotor unit form an electric machine capable of generating a rotational movement through electromagnetic interaction;

[0135] An active drive unit with a centrifugal unit, the active drive unit is fixed to the bottom of the centrifugal liquid collection and discharge unit through a rotary support unit;

[0136] A centrifugal liquid collection and discharge unit having a substantially barrel-shaped structure including an accessory top cover;

[0137] A rotary support unit, the rotary support unit at least includes a motor shaft, a bearing housing, and a bearing;

[0138] Wherein the stator assembly, the bearing housing, and the bearing are arranged at the bottom of the centrifugal liquid collection and discharge unit having a substantially barrel-shaped structure in a manner that their axes coincide with the axis of the motor shaft.

[0139] Any active drive unit or solid-liquid separation device according to the present invention, the polymer material used in its manufacture is selected from polyolefins (including polypropylene (PP), polyethylene (PE), polybutene-1 (PB-1)) or halogenated polyolefins, polycycloolefins, polysulfones, polyether ketones, polyesters, polyacrylates, polymethacrylates, polyamides (PA), polyimides, polycarbonates (PC), polyurethanes, polyacetals, polystyrenes (PS), acrylonitrile / butadiene / styrene copolymers (ABS), liquid crystal polymers (LCP), and polyphenylene sulfides (PPS), or a copolymer of two or more of these. Among them, a polymer material with relatively strong acid, alkali, and / or organic solvent resistance is preferably used to improve the service life of the device.

[0140] More specifically, the polymer material is preferably a reinforced polymer material, and the reinforced polymer material includes at least 5% to 50% by weight, preferably 7% to 30% by weight of fiber-reinforced filler.

[0141] Even more specifically, polyolefins containing 7% to 12% by weight of glass fiber-reinforced filler are particularly preferred.

[0142] Beneficial effects:

[0143] Compared with the prior art, the active drive unit and its solid-liquid separation device provided by the present invention have the following advantages:

[0144] (1) The centrifugal unit performing the solid-liquid centrifugal separation task and the active drive unit are designed as an integrated structure, which minimizes the number of device parts and simplifies its manufacturing process. The device manufacturing and assembly become simple, and at the same time, the weight of the whole machine is reduced, which is convenient for handling.

[0145] (2) Due to the electrical insulation measures taken by the active drive unit, the safety of the whole device is improved.

[0146] (3) The active drive unit directly drives the centrifugal unit to perform the solid-liquid separation task, with high electric energy / mechanical energy conversion efficiency, reducing the energy consumption of the device operation.

[0147] (4) The device has high coaxiality and operates stably and quietly, avoiding the vibration and noise caused by coaxiality deviation of conventional belt-driven solid-liquid separation devices.

[0148] (5) The device is easy to maintain and clean and verify, and has low usage costs. Description of the drawings

[0149] Figure 1 is a schematic structural diagram of the active drive unit 1 with a centrifugal unit;

[0150] Figure 2 is a schematic structural diagram of the active drive unit 2 with a centrifugal unit;

[0151] Figure 3 is a schematic structural diagram of the active drive unit 3 with a centrifugal unit;

[0152] Figure 4 is a schematic diagram of the disassembly and combination structure of the metal components of the active drive unit with a centrifugal unit;

[0153] Appendix Figure 5 is a schematic structural diagram of the active drive unit 4 with a centrifugal unit formed by molding and assembling;

[0154] Wherein:

[0155] 101. Mounting bracket mounting hole; 102. Motor shaft hole; 103. Mounting bracket;

[0156] 104. Inner rotor unit; 105. Permanent magnet; 106. Outer rotor unit;

[0157] 107. Outer reinforcing rib; 108. Liquid distribution plate; 109. Inner reinforcing rib;

[0158] 110. Centrifugal drum; 111. Centrifugal through hole; 112. Centrifugal cover mounting hole;

[0159] 113. Centrifugal cover groove; 114. Feeding hole; 115. Injection molding insulation hole;

[0160] 116. Outer rotor; 117. Inner rotor; 118. Insulation layer E;

[0161] 119. Insulation layer F; 120. Insulation layer G; 121. Insulation layer H;

[0162] 201. Motor shaft; 202. First metal component; 203. Through hole;

[0163] 204. Card slot; 205. Card-shaped protrusion; 206. Centrifugal cover front body;

[0164] 207. Spacer; 208. Insulation layer I; 209. Insulation layer J;

[0165] 301. Reinforcing rib; 302. Radial inner reinforcing rib; 303. Spline;

[0166] 304. Centrifugal cover; 305. Radial reinforcing rib; 306. Circumferential reinforcing rib;

[0167] 401. Radial outer reinforcing rib; 402. Mounting arm; 403. Fixed through hole;

[0168] 404. Fixed screw. Specific embodiments

[0169] The following describes exemplary embodiments of the active drive unit with a centrifugal unit and its solid-liquid separation equipment in the present invention with reference to the accompanying drawings.

[0170] Unless otherwise specified, the basic meanings of the terms in this patent are as follows:

[0171] "Circumferential direction" refers to the circumferential direction of a circle formed with a point on the center line of the motor shaft as the center and perpendicular to the center line of the motor shaft;

[0172] "Axial direction" refers to the direction that coincides with or is parallel to the center line of the motor shaft;

[0173] "Radial direction" refers to the radial direction perpendicular to the center line of the motor shaft and passing through the center of the circle located on the center line;

[0174] "Interference connection" refers to the connection between two parts achieved by using the interference fit between parts, and its assembly methods include press-fitting method, thermal expansion fitting method, cold shrinkage fitting method, etc.;

[0175] "Snap connection" refers to a connection method that restricts relative displacement between two parts through an inlaid connection including but not limited to the mating grooves and protrusions, card slots / holes / bays and snaps, or dovetail grooves and dovetail tenons on the two parts;

[0176] "Radial direction" refers to the radial direction perpendicular to the center line of the motor shaft and passing through the center of the circle located on the center line;

[0177] "Interference connection" refers to the connection between two parts achieved by using the interference fit between parts, and its assembly methods include press-fitting method, thermal expansion fitting method, cold shrinkage fitting method, etc.;

[0178] "Snap connection" refers to a connection method that restricts relative displacement between two parts through an inlaid connection including but not limited to the mating grooves and protrusions, card slots / holes / bays and snaps, or dovetail grooves and dovetail tenons on the two parts;

[0179] "Molded forming" refers to the process of obtaining an object with a target geometric shape by using a mold in the production process, including but not limited to stamping forming, blanking forming, casting forming, injection molding, etc., and the "welding" is a special form of "molded forming";

[0180] "Cutting forming" refers to the process of obtaining an object with a target geometric shape by using processes other than "molded forming", including but not limited to turning, planing, milling, drilling, grinding, cutting (sawing), etc.;

[0181] "Bending forming" refers to the process of obtaining an object with a target geometric shape by using processes including but not limited to rolling, winding, bending, etc., such as rolling or winding a certain object into a cylindrical object or bending it at any angle.

[0182] Example 1

[0183] The structural schematic diagram of the active driving unit in this example is shown in Figure 1.

[0184] As Figure 1A shown, the integrally stamping-molded second metal component has a centrifugal drum (110), outer reinforcing ribs (107) and inner reinforcing ribs (109) of the rotor unit support part, a liquid distribution disk (108), injection molding insulating holes (115), and centrifugal through holes (111) and centrifugal cover mounting holes (112) regularly distributed on the centrifugal drum formed by a punching process.

[0185] As Figure 1A shown, the mounting bracket (103) has a mounting bracket mounting hole (101) and a motor shaft hole (102), and the injection molding centrifugal cover has a feeding hole (114), a centrifugal cover mounting hole (112), and a centrifugal cover groove (113) positioned on the centrifugal drum.

[0186] As Figure 1B shown, the second metal component and the rotor unit (105, 106) composed of a magnetic yoke and a permanent magnet (105) pasted thereon are positioned in a mold, where the rotor unit (105, 106) does not contact the outer and inner reinforcing ribs of the rotor unit support part (indicated by D and E in the figure), and then injection molded into an active driving unit as Figure 1C shown. The active driving unit has an outer rotor (116), an inner rotor (117), an electrically insulated mounting bracket mounting hole (101), and Figure 1D as

[0187] shown, electrically insulating layers E (118), F (119), G (120), and H (121) located between the rotor unit and the second metal component.

[0188] Example 2

[0189] The structural schematic diagram of the active driving unit in this example is shown in Figure 2.

[0190] As Figure 2AAs shown in the figure, after integral stamping, the first and second metal components are formed. The first metal component (202) has a motor shaft hole, a through hole (203) for enhancing the structural strength after injection molding, a card-shaped protrusion, and a card slot formed by adjacent card-shaped protrusions. The second metal component has a centrifugal drum, outer and inner ribs on the rotor unit support part, a front centrifugal cover body (206), regularly distributed centrifugal through holes formed on the centrifugal drum through a punching process, a through hole (203) for enhancing the structural strength after injection molding, a card-shaped protrusion (205), and a card slot (204) formed by adjacent card-shaped protrusions.

[0191] As Figure 2B shown, after fixing the first metal component to the motor shaft, the first metal component, the second metal component, and the rotor unit (105, 106) are positioned in a mold together, and then injection molded into an active drive unit as shown in Figure 2C the figure. The active drive unit has a partition (at the position shown by 207) that simultaneously encloses the rotor unit support part and the centrifugal unit, an outer rotor (116), an inner rotor (117), a motor shaft, and insulating layers I (208) and J (209) formed by a spraying process for achieving electrical insulation from the stator unit.

[0192] Finally, the front centrifugal cover body is made into a centrifugal cover with a feeding hole in the center through the closing process of a closing machine (this process can also be placed before injection molding), thereby obtaining an active drive unit with a complete structure.

[0193] Embodiment 3

[0194] The structural schematic diagram of the active drive unit in this embodiment is shown in Figure 3.

[0195] As Figure 3A shown, the integrally stamped second metal component has a centrifugal drum, a rib on the rotor unit support part (301), a radial inner rib on the partition (302), a through hole (203) located on the radial inner rib of the partition for enhancing the structural strength after injection molding, a card slot formed by adjacent radial inner ribs of the partition, and centrifugal through holes (111) regularly distributed on the centrifugal drum formed through a punching process.

[0196] As Figure 3B shown, the first metal component with a spline (303), the second metal component, and the rotor unit (106) are positioned in a mold together, where the rotor unit does not contact the rib on the rotor unit support part, and then injection molded into an active drive unit as shown in Figure 3C the figure. The active drive unit has an outer rotor (116), injection molded radial ribs (305) and circumferential ribs (306).

[0197] Finally, the centrifugal cover (304) is fixedly connected to the second metal component with a centrifugal drum through a curling / stitching process (this process can also be placed before injection molding), thereby obtaining an active drive unit with a complete structure.

[0198] Example 4

[0199] The schematic structural diagram of the active drive unit in this example is shown in Figure 4.

[0200] As Figure 4A shown, the integrally stamped first metal component has a motor shaft hole (102), through holes for enhancing the structural strength after injection molding, rotor unit support part reinforcing ribs (301), radially outer reinforcing ribs (401) of the spacer part, and injection molding insulation holes (115) located on the radially outer reinforcing ribs of the spacer part for installing the centrifugal unit. The integrally stamped second metal component has a centrifugal cover (304), a centrifugal drum (110), and centrifugal through holes regularly distributed on the centrifugal drum and fixed through holes (403) for fixing the centrifugal unit formed by a punching process, and an installation arm (402) is manufactured and formed through cutting and bending processes.

[0201] As Figure 4B shown, after the first metal component is fixed to the motor shaft, it is positioned together with the rotor unit (106) in the mold (contact between the rotor unit and the rotor unit support part reinforcing ribs), then injection molding is carried out (the injection molding material covers the entire first metal component and the end of the motor shaft to obtain electrical insulation for the centrifuged target substance and its various components), and then the second metal component is fixedly connected to the injection molded part by fixing screws (404) through the fixed through holes (403) on the installation arm (402), thereby obtaining an active drive unit with a complete structure as Figure 5 shown, which has an outer rotor (116), a motor shaft (201), injection molded radial reinforcing ribs (305) and circumferential reinforcing ribs (306).

[0202] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and apply the present invention. Those skilled in the art can obviously make various modifications to these embodiments easily, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the embodiments here, and any improvements and modifications made by those skilled in the art to the present invention should be within the protection scope of the present invention.

Claims

1. An active drive unit with a centrifugal unit, characterized in that, Comprising: At least one rotor unit, the rotation force generated by the electromagnetic interaction between the rotor unit and the adapted stator unit causes the active drive unit to rotate around the center line of the motor shaft; A centrifugal unit, which includes a centrifugal drum with centrifugal through holes on its peripheral wall and a centrifugal cover with a feeding hole in the center; A spacer, which separates the active drive unit into an upper centrifugal unit and a lower rotor unit support part while controlling the flow direction of the target substance and its components located inside and / or outside the centrifugal unit, and the spacer closes the bottom of the centrifugal unit; At least one rotor unit support part for carrying the rotor unit; The active drive unit is related to the motor shaft by any one of the following shaft connection methods A, B, C: A. Through the motor shaft mounting hole located in the center of the spacer; B. Through a mounting bracket, the mounting bracket is fixedly connected to the spacer and the motor shaft, or is an integral structure with the spacer and / or the motor shaft; C. The motor shaft and the active drive unit are an integral structure; wherein a longitudinal section is jointly formed between the spacer portion and the rotor unit support portion as type of integral structure, and the type of structure includes a metal structure portion derived from at least one metal component and / or a molded structure portion derived from a polymer material formed by molding; Wherein the active drive unit has at least one of the following three electrical insulation measures I, II, III: I. At least the surface of the rotor unit facing the air gap is covered with a non-conductive insulating material layer after being processed by a treatment process; II. Each part between the rotor unit and the adjacent rotor unit support is electrically insulated by a non-conductive insulating material layer; III. The metal part that non-electrically insulates and carries the rotor unit is electrically insulated from the rest of the rotor unit support and from the target substance and its components located inside and / or outside the centrifugal unit by a non-conductive insulating material layer; Wherein the rotor unit support includes a centrifugal unit, a spacer, and a rotor unit support part.

2. The active drive unit according to claim 1, characterized in that, The rotor unit includes one of the following four structures: A combination of a conductive winding or an iron core and a conductive winding; A combination of an iron core and a permanent magnet; A combination of rotor bars, end rings, and an iron core; A combination of a permanent magnet, rotor bars, end rings, and an iron core; Wherein for the active drive unit having two or more rotor units, the rotor units are axially arrayed or radially juxtaposed around the center line of the motor shaft.

3. The active drive unit according to claim 2, characterized in that, The active drive unit includes one of the following structures: An outer stator single inner rotor structure with radial air gap flux; An inner stator single outer rotor structure with radial air gap flux; An inner and outer double stator intermediate rotor structure with radial air gap flux; A double rotor structure with a middle stator combined with an inner rotor and an outer rotor with radial air gap flux; A single stator single rotor structure with axial air gap flux; An intermediate stator upper and lower rotor structure with axial air gap flux.

4. The active drive unit according to claim 3, characterized in that: The active drive unit includes at least one metal part and / or a molded part composed of a molded structural part molded from a polymer material; Wherein the first metal part among the metal parts is located at the position of the inner spacer of the active drive unit; Wherein the second metal part among the metal parts is located at the position of the outer centrifugal unit of the active drive unit.

5. The active drive unit according to claim 3, characterized in that, Manufacturing and molding the active drive unit at least includes: A process of molding the rotor unit and at least one metal part with a polymer material; or A process of directly molding the rotor unit with a polymer material; An active drive unit having both a first metal component and a second metal component, wherein the first metal component and the second metal component are electrically insulated from each other.

6. The active drive unit according to claim 5, wherein The first metal component in the active drive unit includes one of the following structures: Spline; A rotor insert having an inner shaft mounting structure and an outer connection structure, and the rotor insert functions as a mounting bracket; A first metal component having a spacer portion and a rotor unit support portion; A first metal component having a spacer portion and a centrifugal drum; A first metal component having a spacer portion, a centrifugal drum, and a centrifugal cover.

7. The active drive unit according to claim 5, wherein The second metal component in the active drive unit includes one of the following structures: A second metal component having a centrifugal drum and a centrifugal cover; A second metal component having a centrifugal drum and a rotor unit support portion; A second metal component having a centrifugal drum, a centrifugal cover, and a rotor unit support portion; A second metal component having a centrifugal drum, a part or all of the spacer portion, and a rotor unit support portion; A second metal component having a centrifugal drum and a part or all of the spacer portion; A second metal component having a centrifugal drum, a centrifugal cover, and a part or all of the spacer portion; A second metal component having a centrifugal drum, a centrifugal cover, a part or all of the spacer portion, and a rotor unit support portion.

8. The active drive unit according to claim 6 or 7, wherein For the first metal component and / or the second metal component manufactured by a manufacturing process, the first metal component and / or the second metal component are further processed by the manufacturing process to form one of the following seven structures: Spacer rib; Rotor unit support rib; A combination of a spacer rib and a rotor unit support rib; A part or all of the spacer portion; Rotor unit support portion; Centrifugal cover; A fixed connection structure of a component having at least a centrifugal unit.

9. The active drive unit according to claim 6 or 7, wherein For the first metal component and / or the second metal component manufactured by a manufacturing process, the first metal component and / or the second metal component are further processed by the manufacturing process to form a combination of one of the following five structures and a spacer reinforcement structure and / or a connection structure: Spacer rib; Rotor unit support rib; A combination of a spacer rib and a rotor unit support rib; A part or all of the spacer portion; Rotor unit support portion.

10. The active drive unit according to claim 6 or 7, wherein For the first metal component or the second metal component having a centrifugal drum, the manufacturing of its centrifugal cover includes one of the following processes: Molded with a polymer material and then assembled to the first metal component or the second metal component; Molded integrally with the centrifugal drum; Processing the top open end without a centrifugal through hole of the first metal component or the second metal component by a manufacturing process using at least a necking machine to form a centrifugal cover with a central feeding hole; Fixing and connecting the centrifugal cover to the first metal component or the second metal component having a centrifugal drum by a curling / stitching process.

11. A solid-liquid separation device, comprising: A stator assembly, the stator assembly includes at least one stator unit adapted to a rotor unit, and the stator unit and the rotor unit form an electric machine capable of generating a rotational motion through electromagnetic interaction; A centrifugal liquid collection and discharge unit having a substantially barrel-shaped structure including an accessory top cover; A rotary support unit, the rotary support unit includes a motor shaft, a bearing chamber, and a bearing; The stator assembly, the bearing housing, and the bearing are arranged at the bottom of the centrifugal liquid collection and discharge unit in such a way that their axes coincide with the axis of the motor shaft; It is characterized in that it further comprises: Any one of the active drive units described in claims 1 to 10, the active drive unit being fixed to the bottom of the centrifugal liquid collection and discharge unit through a rotary support unit.

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