CN108554652B

CN108554652B - Direct-drive centrifugal separation equipment

Info

Publication number: CN108554652B
Application number: CN201810250535.2A
Authority: CN
Inventors: 唐凌霄; 杨开富; 杨艳; 黄良凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-23
Filing date: 2015-03-23
Publication date: 2020-12-15
Anticipated expiration: 2035-03-23
Also published as: CN108554652A; CN105251624A; CN108607693B; CN108607693A; CN105251624B; CN108554651A; CN108554651B

Abstract

The invention discloses a direct-drive centrifugal separation device, which comprises: a motor rotor integrated with the centrifugal turntable and a centrifugal drum or a centrifugal rotor as an independent part; or comprises a motor rotor and a motor stator which are integrated with the centrifugal turntable into a whole; the position of the motor air gap port which can lead to one side of the annular groove is higher than the inner surface of the bottom of the annular groove with a liquid outlet; the gap communicating with the motor air gap is sealed at any location on one side of the open to the annular recess, the seal isolating the target substance from the motor air gap. The invention has the advantages that: the motor rotor and the centrifugal drum or the centrifugal rotor of the device can be switched between a locking state and an unlocking state, parts are convenient to manufacture and assemble, the device is high in safety, quiet and stable in operation, easy to maintain and clean and verify, and various defects or defects of the existing solid-liquid separation device can be overcome.

Description

Direct-drive centrifugal separation equipment

The application is a divisional application with the title of 'a direct-drive centrifugal separation device' on application date 2015, 03 and 23, application number CN201510128476.8, application publication number CN 105251624A.

Technical Field

The invention relates to a direct-drive centrifugal separation device and a using method thereof, in particular to a small-sized solid-liquid mixture centrifugal separation device and a using method thereof, which can be used for completely separating gram-level to kilogram-level solids from a solid-liquid mixture in a laboratory and perfectly cleaning the device.

Background

In laboratory pilot and pilot research and industrial processes, we often encounter situations where it is necessary to thoroughly separate a solid-liquid mixture and wash the solids to obtain a satisfactory solid or liquid. Solid-liquid separation equipment often used in industrial production is various centrifuges, in particular a three-leg centrifuge. However, the existing equipment which is formed by the miniaturization and improvement of the centrifugal machine for industrial production is too heavy, too large in noise and vibration, and the centrifugal drum cannot be changed in size according to needs or is particularly difficult to change, so that the equipment is not suitable for the requirements of laboratory small tests and pilot tests.

In laboratory studies, the equipment that we have selected for use is mainly a bench centrifuge of various specifications or a buchner funnel plus filter flask combination, and in particular, the buchner funnel plus filter flask combination is most commonly used. However, the use of buchner funnels for the filtration and separation of solid-liquid mixtures has many drawbacks, even if the same raw materials and processes are used, due to the differences in experience, technique, operating skills, etc. of each person, which results in a significant difference in the quality of the products obtained, even if they are not acceptable, in particular in the case of solid-liquid mixtures containing oily impurities, coloured impurities or both. Even different batches of product from the same person may have significant differences in quality, or even be off-specification.

In the case of a bench centrifuge, a centrifugal settler is often referred to, which does not allow a thorough separation of solids from liquids in a solid-liquid mixture and a good washing and removal of impurities. Various improved solid-liquid separation cartridges have been devised for the purpose of achieving thorough separation of solids from liquids in a solid-liquid mixture and good scrubbing and impurity removal. Nevertheless, the bench centrifuge still has the fatal defect: (1) the solid cannot be cleaned on-line: the washing of the solid is carried out under the condition of the rotation of the rotor, the actual condition in the production cannot be simulated, and necessary centrifugal operation data is provided for the production in advance; (2) no on-line feeding: namely, charging is carried out when the rotor rotates; (3) a precise balancing material cylinder is needed to carry out centrifugal operation, and a single sample cannot be centrifuged; (4) the loading capacity of the charging barrel is limited to a certain extent and cannot well meet various requirements.

One of the main features of laboratory pilot and pilot scale tests is: often need switch over between the product of different cultivars or different batch numbers, this just needs to carry out quick change to the centrifugal rotary drum, carries out quick washing verification to centrifugal liquid collection chamber. The existing various centrifuges or solid-liquid separators have various defects or defects of complex structures, difficult fixing and taking out of a centrifugal drum, time and labor waste in cleaning of the centrifuges, complex manufacturing processes, low price, high maintenance cost and the like, and can not better meet the requirement of thoroughly separating solid-liquid mixtures in laboratory pilot scale tests and pilot scale tests.

Disclosure of Invention

The invention aims to provide direct-drive centrifugal separation equipment and a using method thereof, which can overcome various defects or shortcomings of various conventional centrifuges or solid-liquid separators and better meet the requirement of thoroughly separating solid-liquid mixtures in laboratory pilot scale and pilot scale tests.

The technical scheme is as follows:

in order to overcome various defects or disadvantages of various conventional centrifuges or solid-liquid separators, the invention provides direct-drive centrifugal separation equipment and a using method thereof, and the equipment structurally adopts the following measures:

a direct drive centrifugal separation apparatus, comprising: a motor rotor integrated with the centrifugal turntable and a centrifugal drum or a centrifugal rotor as an independent part; or comprises a motor stator and a motor rotor which is integrated with the centrifugal turntable into a whole;

wherein the task of the centrifugal drum or rotor is to separate the components of a mixture containing at least one liquid component by centrifugal force;

wherein the centrifuge drum (FIG. 2) performing a solid-liquid centrifugation task comprises:

the fixed connecting structure B interacts with the fixed connecting structure A on the motor rotor so as to realize the locking between the centrifugal drum and the motor rotor during centrifugation and the unlocking after the centrifugation is finished, and the centrifugal drum coaxially rotates along with the motor rotor at the same speed during locking;

centrifugal drum top covers 2-3 and 9-11 with a feed hole 2-6 in the center for preventing target substances from overflowing from the front end of the centrifugal drum body;

centrifugal drum bodies 2-2, 9-5 for executing solid-liquid separation function, wherein the cylindrical peripheral wall of the centrifugal drum body is provided with a filter hole 2-5 penetrating through;

a centrifugal drum bottom 2-1 for preventing the target substance from overflowing from the rear end of the centrifugal drum body;

wherein the centrifugal rotor (fig. 3) performing a solid-liquid centrifugation task comprises:

the fixed connection structure B interacts with the fixed connection structure A on the motor rotor so as to realize the locking between the centrifugal rotor and the motor rotor during centrifugation and the unlocking after the centrifugation is finished, and the centrifugal rotor coaxially rotates along with the motor rotor at the same speed during locking;

a centrifuge rotor body 3-1 providing a centrifuge tube hole carrier for fixing a centrifuge tube;

the centrifugal pipe hole 3-2 is positioned on the centrifugal rotor body, and a certain angle is formed between the centrifugal pipe hole and the horizontal plane or the central line of the motor shaft;

a centrifuge tube of suitable structure;

wherein said motor rotor driving the centrifugal drum or rotor to perform a solid-liquid centrifugal separation task comprises:

the motor rotor is locked with the centrifugal drum or the centrifugal rotor during centrifugation and unlocked after the centrifugation is finished, and the centrifugal drum or the centrifugal rotor and the motor rotor coaxially rotate at the same speed during locking;

the rotor assembly 8-6 enables the motor rotor to rotate around the central line of the motor shaft through the rotating force generated by the electromagnetic interaction between the rotor assembly and the adaptive stator assembly 8-7;

a spacer part which takes charge of a medium for connection between the rotor assembly support part and the centrifugal drum or the centrifugal rotor and controls the flow direction of the target substance and its components in a centrifugal state;

a rotor assembly support carrying the rotor assembly;

the rotor assembly is positioned at a rotor assembly supporting part or a rotor assembly spacing part corresponding to the stator assembly through a motor air gap, and the position of the rotor assembly is determined by a magnetic flux structure of the driving motor;

wherein the motor air gap can open to the port on one side of the annular groove (positions shown in 7-19, and position B in FIGS. 9 and 10) at a position higher than the inner surface of the bottom of the annular groove with the liquid discharge port;

wherein a gap communicating with the motor air gap is sealed at any one of the positions (positions 7-19, position B in fig. 9 and 10) leading to one side of the annular recess, said seal isolating the target substance from the motor air gap.

In detail, the combination of the motor air gap and the bottom of the annular groove, the sealed isolation between the motor air gap and the annular groove and the plastic package structure form of the motor can prevent the target substance, particularly the liquid component of the target substance, from entering the motor air gap and keeping the motor in an electric insulation state to the maximum extent, thereby reducing the complexity of the motor structure (no complex electric insulation measure is needed for the motor), and improving the corrosion resistance (the plastic package material can resist the corrosion of acid, alkali, salt and organic solvent) and the electric safety of the centrifugal equipment, which is the key point for the success of the centrifugal equipment with the structure type.

In detail, the target substance includes a solid-liquid mixture separated by centrifugation and its respective constituent components (i.e., a solid portion and a liquid portion); the expression "capable of being accessed to the annular groove" means "if not sealed, the motor air gap is communicated with the annular groove through a gap, and the target substance can enter the motor air gap"; the "gap" includes, but is not limited to, the gap formed between the motor rotor and the top of the inner sidewall of the annular groove.

In detail, fig. 1 (including fig. 1-1 to 1-9) illustrates several centrifugal carousels with the most common fixed connection structures a, including but not limited to protrusions 1-2, 1-4, 1-6, through holes 1-8, 1-9, and slots 1-10.

In detail, fig. 2 (including fig. 2-1 to 2-3) illustrates several centrifuge drums having the most common fixed attachment structures B, including but not limited to projections 2-4, 2-7, and grooves 2-8.

In detail, fig. 3 (including fig. 3-1 to 3-3) illustrates several centrifugal rotors having the most common fixed connection structures B including, but not limited to, projections 3-3, 3-5, and catches 3-4.

In detail, which kind of fixed connection structure is selected between the motor rotor and the centrifugal drum or the centrifugal rotor is determined as the case may be, wherein fig. 4 (including fig. 4-1 to fig. 4-3) illustrates three typical cases of interaction between a fixed connection structure a on the motor rotor and a fixed connection structure B on the centrifugal drum or the centrifugal rotor, and thus mutual locking or unlocking between the two is achieved.

In detail, fig. 5 (including fig. 5-1 to 5-6) illustrates several hollow rotors of an electric motor with the most common fixed connection structures, wherein the fixed connection structures B include, but are not limited to, protrusions 5-3, 5-4, 5-6 and slots 5-7.

In detail, when the motor rotor is in a radial magnetic flux structure (fig. 7 and 8), the rotor assembly supporting part (positions 7-9 in fig. 7) and the spacing part (positions 7-8 in fig. 7 and positions 8-5 in fig. 8) are respectively and independently present, and the rotor assembly supporting part and the spacing part and the rotor assembly form the motor rotor together.

In detail, when the motor rotor is in an axial magnetic flux structure (fig. 9 and 10), the rotor assembly supporting portion and the spacing portion are combined into a whole (positions shown by 9-7 in fig. 9 and 10), and the rotor assembly is located at the spacing portion, so that the structure of the motor rotor is greatly simplified, the weight of the motor rotor is reduced, the motor efficiency is improved, and the energy consumption is reduced.

As a further optimization of the invention, the centrifugal drum or the centrifugal rotor performing the solid-liquid separation task is locked on the motor rotor during centrifugation through the fixed connecting structure B and coaxially rotates along with the motor rotor at the same speed, and is unlocked and taken out after the centrifugation is finished; the motor rotor and the centrifugal drum or the centrifugal rotor are mutually matched so as to realize locking between the motor rotor and the centrifugal drum or the centrifugal rotor during centrifugation and fixed connecting structures A and B for unlocking after the centrifugation is finished, wherein the fixed connecting structures A and B are selected from any one of the following structures or a composite structure between two or more of the following structures: screw thread, arch, recess, draw-in groove, buckle, through-hole.

As a further optimization of the present invention, the projections, the grooves, the locking grooves, the fasteners, the through holes or the composite locking and/or unlocking structure between two or more of them, which are mutually matched between the centrifugal drum and the motor rotor to realize locking and/or unlocking between them, are arranged along the circumferential direction and extend along the axial direction with the motor shaft as the center, and the height or depth of the axial direction is larger than the radial width or radius thereof, wherein the cross section pattern of the projections, the grooves, the locking grooves, the fasteners and the through holes is preferably an axisymmetric or centrosymmetric structure pattern.

In detail, the structure for realizing the locking and/or unlocking between the centrifugal drum or the centrifugal rotor and the motor rotor may be arranged on the upper surface (see embodiment 1), the lower surface, the outer circumferential surface, the inner circumferential surface or the inner surface and the end surface of the centrifugal drum of the centrifugal turntable or the centrifugal drum (fig. 1); or on the outer surface (examples 2 and 8), the ends (examples 3 and 4) of the inner rotor, outer rotor or disc motor rotor of the motor; or arranged in the inner part, the bottom part and the end part of the hollow rotor of the motor (figures 11 and 12); or on the outer surface, upper end, lower end, bottom outer surface of the centrifugal drum or rotor (fig. 2, 3).

In detail, fig. 5 illustrates a structure of a hollow rotor of a motor having the most common fixed connection structure a, fig. 7, 8, and 9 illustrate a case where a centrifugal drum having the most common fixed connection structure B interacts with the motor rotor to perform a solid-liquid separation task, and fig. 11 and 12 illustrate a case where a centrifugal drum having the most common fixed connection structure B interacts with the hollow rotor of a motor to perform a solid-liquid separation task, and it is also applicable to replace the centrifugal drum with a centrifugal rotor.

As a further refinement of the invention, a liquid component which is centrifuged through the centrifuge drum or rotor and flows into a centrifuged liquid collection chamber is collected by it and directed in flow direction, the centrifuged liquid collection chamber comprising:

a top cover having at least a channel for introducing the centrifuged material into a centrifugal zone of the rotary centrifugal unit and closing the top end of the wall of the centrifuged liquid collection chamber to prevent the centrifuged material from escaping from the top end thereof, said centrifugal zone of the rotary centrifugal unit comprising at least a centrifugal drum or rotor;

a centrifugal liquid collection chamber wall for collecting and directing liquid material components to flow to an annular groove located in the base portion;

the centrifugal liquid collecting cavity is an internal cavity surrounded by the top cover, the centrifugal liquid collecting cavity wall and the base part (positions shown by 6-17, 7-6 and 9-12);

a base portion closing a bottom end of a centrifugal liquid collection chamber wall, the base portion comprising:

a bearing housing located at an innermost side, a bearing chamber portion in the bearing housing accommodating a bearing supporting a rotating shaft of a rotating centrifugal unit;

the annular groove is positioned on the outermost side and connected with the cavity wall of the centrifugal liquid collecting cavity, the liquid outlet is communicated with the bottom of the annular groove, the annular groove is used for collecting liquid material components, the liquid outlet positioned at the bottom of the annular groove is used for limiting the outflow direction of the liquid material components, and the inner surface of the bottom of the annular groove is lower than the position of a port of a motor air gap leading to one side of the annular groove;

a motor stator section providing a mounting area for a motor stator;

a motor rotor rotation zone providing a rotation zone of the rotating centrifugal unit in a centrifugal operation state and a parking zone in a stopped state;

wherein a gap in communication with said motor air gap is sealed at any location to one side of the annular recess, said seal isolating the target substance from said motor air gap;

wherein the relative position between the motor stator region and the motor rotor rotating region is determined by the magnetic flux structure between the motor stator and the motor rotor.

As a further optimization of the present invention, the motor stator integrally formed by the plastic package stator assembly is fixed to the motor stator region of the base part of the centrifugal liquid collection chamber or the stator assembly and the base part are integrally formed by plastic package at the position of the motor stator region;

wherein the motor stator (fig. 7 to 10) includes:

a stator assembly adapted to the rotor assembly, the stator assembly and the rotor assembly electromagnetically interacting to form a motor capable of generating rotary motion to drive the rotary centrifugal unit to rotate around the center line of the motor shaft, the stator assembly being located at the base portion of the centrifugal liquid collecting chamber corresponding to the rotor assembly with an air gap therebetween;

a rotation support unit including a motor shaft, a bearing chamber, and a bearing, the rotation support unit being located at the center of a bearing housing of the centrifugal liquid collection chamber base part;

the stator assembly supporting part bears the stator assembly and forms a motor stator with complete structure and function together with the stator assembly;

wherein the motor stator and/or the plastic-encapsulated structure part of the centrifugal liquid collecting cavity base part and the sealing of the motor gap are cooperated to ensure that the motor and the target substance are isolated in an electric insulation way.

In detail, it is preferable that the stator assembly and the base portion are integrally molded at the position of the motor stator region.

As a further refinement of the invention, the motor rotor is preferably cantilevered on the motor shaft; the motor height is preferably less than its diameter or width; the motor stator and the motor rotor are preferably in an all-plastic sealing structure. Such a structural arrangement can reduce the complexity of the motor structure, lower the center of gravity and enhance the balance performance of the entire rotating member, including the motor rotor and the centrifugal drum or rotor, which performs the solid-liquid centrifugal separation task, and improve the safety of the centrifugal separation apparatus.

As a further optimization of the invention, the ratio of the diameter of the centrifugal drum to the effective height thereof for centrifugally separating the solid-liquid mixture is preferably 2-10, more preferably 2-5, and the size of the ratio is determined by the diameter of the centrifugal drum.

In detail, this ratio is closer to 2 when the diameter of the centrifugal drum is larger; this ratio is closer to 10 as the diameter of the centrifuge drum is smaller. This greater ratio with respect to industrial centrifuges (typically 1.5 to 2.0) makes it possible to increase the centrifugal force to which the liquid material is subjected during centrifugation and to increase the radial thickness of the solid material in the bowl during centrifugation, which is very advantageous for the thorough removal of impurities from the product during washing, as well as for the arrangement of the connection on the centrifuge disk or bowl, the manufacture of the centrifuge bowl and the replacement thereof during use.

As a further optimization of the invention, the centrifugal turntable or the centrifugal drum is an independent component fixed at the shaft extension end of the motor, when the driving motor is positioned at the center of the outer side of the bottom of the centrifugal liquid collecting cavity, the base and the metal base, or the metal shell and the end cover of the motor, or the stator assembly are integrally formed by thermosetting or thermoplastic plastics to form the cavity wall of the centrifugal liquid collecting cavity; the upper bearing and the lower bearing are positioned in a bearing chamber of a central cavity surrounded by the stator assembly at the outer side of the bottom of the integrally formed centrifugal liquid collecting cavity; the motor rotor cantilever is connected on the motor shaft.

In detail, when the centrifugal turntable or the centrifugal drum is an independent part (figure 6), and the driving motor is positioned at the center of the outer side of the bottom of the centrifugal liquid collecting cavity 6-17, the front end cover 6-13 of the motor, the extension section thereof, the base 6-9 and the stator assembly 6-8 are integrally formed by plastic package materials to form the cavity wall 6-3 of the centrifugal liquid collecting cavity, and the center of the bottom of the centrifugal turntable or the centrifugal drum is surrounded to form a circular cavity for accommodating the upper bearing 6-19, the lower bearing 6-22 and the motor shaft 6-20; the motor rotor cantilever is connected to a motor shaft; the metal shell or end cover of the driving motor can also extend outwards to the inner wall of the centrifugal liquid collecting cavity along the radial direction and then extend upwards to the top of the centrifugal liquid collecting cavity along the axial direction, so that a metal reinforcing part of the inner wall of the centrifugal liquid collecting cavity is formed.

In detail, said fig. 6 and its embodiment 1 can be regarded as a solid-liquid centrifugal separation device close to the conventional structure or as a starting point for further improvement and perfection of the present invention.

As a further optimization of the invention, when the motor rotor is an outer rotor and the driving motor is partially or completely positioned in the center of the inner side of the bottom of the centrifugal liquid collecting cavity, the motor end cover, the base, the metal base or the stator assembly of the motor rotor is integrally formed by thermosetting or thermoplastic plastics to form the cavity wall of the centrifugal liquid collecting cavity; the motor outer rotor cantilever is connected with the motor shaft extension end, and the upper bearing and the lower bearing are positioned in a bearing chamber of a central cavity surrounded by the stator assembly, the end cover, the plastic package material and the base at the bottom of the integrally formed centrifugal liquid collecting cavity or in a bearing chamber in the center of the metal base;

the composite sealing structure is formed by one or two or three of centrifugal sealing, labyrinth sealing and spiral sealing between the open end of the outer rotor of the motor and the bottom of the centrifugal liquid collecting cavity or between the motor stator and the motor.

In detail, when the motor rotor is an outer rotor (figure 7), the drum connecting structure 7-7 is positioned on the outer surface of the motor outer rotor, the motor rear end cover 7-15 and the extension section 7-23 thereof, the base 7-11 and the stator assembly 7-10 form the cavity wall of a centrifugal liquid collecting cavity integrally by plastic package materials, and the center of the bottom of the centrifugal liquid collecting cavity is surrounded by a cylindrical cavity for accommodating an upper bearing 7-16, a lower bearing 7-17 and a motor shaft 7-18 which are sleeved at two ends of a motor shaft; the motor outer rotor is positioned at the inner side of the bottom of the integrally formed centrifugal liquid collecting cavity 7-6 and is connected with the shaft extension end of the motor shaft 7-18 through a cantilever; or the motor outer rotor, the centrifugal turntable or the centrifugal drum and the centrifugal rotary drum are integrally formed into an integral structure; the sealing structure between the open end of the outer rotor of the motor and the bottom of the centrifugal liquid collecting cavity or the stator assembly is preferably one of centrifugal sealing, labyrinth sealing and spiral sealing or a combination of two or three of the centrifugal sealing, the labyrinth sealing and the spiral sealing.

As a further optimization of the invention, when the motor rotor is an inner rotor, the disc-shaped metal component serving as the reinforcing component and the inner rotor magnetic loop covers the upper surface of the whole rotor magnetic yoke and wraps part or all of the stator magnetic yoke; the disk-shaped metal component, the rotor magnet yoke and the connecting structure are integrally formed by thermosetting or thermoplastic plastic in a plastic package mode to form a motor rotor cantilever which is connected to the extension end of the motor shaft; the upper bearing and the lower bearing of the motor rotor are positioned in a bearing chamber of a central cavity surrounded by an end cover or a metal base and a plastic package material at the bottom of the integrally formed centrifugal liquid collecting cavity, and the motor rotor is positioned in an annular cavity surrounded by the stator assembly and the plastic package material;

the upper end part of the inner rotor of the motor and the bottom of the centrifugal liquid collecting cavity or the motor stator are in a sealing structure selected from any one of centrifugal sealing, labyrinth sealing and spiral sealing or a combination of two or three of the centrifugal sealing, the labyrinth sealing and the spiral sealing.

In detail, when the motor rotor is an inner rotor (figure 8), the rotary drum connecting structure 8-4 is positioned on the outer surface of the inner rotor of the motor, the motor end cover 8-8, the cooling coil 8-2, the base and the stator assembly 8-7 of the rotary drum connecting structure are integrally formed by plastic packaging materials to form the cavity wall of a centrifugal liquid collecting cavity, and the center of the bottom of the rotary drum connecting structure is surrounded to form a cylindrical cavity for accommodating an upper bearing 8-18, a lower bearing 8-15 and a motor shaft 8-17 which are sleeved at two ends of a motor shaft; the motor inner rotor is positioned at the inner side of the bottom of the integrally formed centrifugal liquid collecting cavity and is connected with the shaft extending end of the motor shaft 8-17 through a cantilever; or the inner rotor of the motor, the centrifugal turntable or the centrifugal drum and the centrifugal drum are integrally formed into an integral structure; the sealing structure between the inner rotor and the stator assembly is preferably one of centrifugal sealing, labyrinth sealing and spiral sealing or a combination of two or three of the centrifugal sealing, the labyrinth sealing and the spiral sealing.

As a further optimization of the invention, when the motor rotor is a disk-type motor rotor, the motor rotor is selected from any one of a rotor disk-type motor with an upper rotor, a lower stator or a rotor disk-type motor with two sides of a middle stator, the whole or part of the disk-type motor is positioned at the inner side of the bottom of the integrally formed centrifugal liquid collecting cavity, and the diameter of the upper rotor is larger than that of the stator; a disc-shaped metal component serving as an upper rotor magnetic loop covers the upper surface of the whole rotor magnetic yoke and wraps part or all of the stator magnetic yoke; the disk-shaped metal component, the rotor magnet yoke and the connecting structure are integrally formed by thermosetting or thermoplastic plastic in a plastic package mode to form a motor rotor cantilever which is connected to the extension end of the motor shaft; the upper bearing and the lower bearing of the motor rotor are positioned in a bearing chamber of a central cavity enclosed by the stator assembly and the plastic package material or the metal base;

the sealing structure is formed by combining one or two or three of centrifugal sealing, labyrinth sealing and spiral sealing between the open end of the rotor on the motor and the bottom of the centrifugal liquid collecting cavity or between the open end of the rotor on the motor and the stator of the motor.

In detail, when the motor rotor is a disc type motor rotor (fig. 9 and 10), the rotary drum connecting structure is positioned on the surface of the disc type rotor, preferably on the lower stator of the rotor or any one of rotor disc type motors on two sides of the middle stator, the rotor of the disc type motor is positioned in the center of the inner side of the bottom of the integrally formed centrifugal liquid collecting cavity 9-12, and the diameter of the upper rotor is larger than that of the stator; the disc-shaped metal component 9-24 serving as an upper rotor magnetic loop wraps the whole rotor magnetic yoke part and part of the stator magnetic yoke, the disc-shaped metal component and the rotor magnetic yoke are integrally molded by thermosetting plastics in a plastic package mode, and the rotor is connected to the shaft extension end of the motor shaft 9-23 through a fixing screw 9-19 cantilever; the upper and lower bearings of the motor rotor are positioned in a bearing chamber of a central cavity formed by the stator assembly 9-15 and the plastic package material or the base 9-9; or the upper rotor of the motor, the centrifugal turntable or the centrifugal drum and the centrifugal rotary drum are integrally formed into an integral structure (figure 10); the upper rotor and the stator assembly are preferably in a centrifugal seal, a labyrinth seal or a spiral seal or a combined seal structure of two or three of the centrifugal seal, the labyrinth seal and the spiral seal.

As a further optimization of the present invention, for any one of the direct drive centrifugal separation apparatuses described in the present invention, the centrifugal liquid collection chamber of the direct drive centrifugal separation apparatus includes the structural parts as described in the following (I) and (II):

(I) a metal structural part formed by stamping or other manufacturing processes as a centrifugal liquid collection chamber reinforcing structure and/or a motor structure;

(II) enabling the centrifugal liquid collecting cavity to have a plastic packaging structure part which has a complete structure and functions and is molded by plastic or resin;

wherein the plastic or resin is used for connecting the metal structure parts in a plastic package manner to form a centrifugal liquid collecting cavity with a complete structure and a function in a molding manner or simultaneously plastic packaging the metal structure parts and a stator assembly which is integrated with the base part into a whole structure so as to form the centrifugal liquid collecting cavity with the complete structure and the function (fig. 6-10);

wherein the plastic-sealed structure part and the sealing of the motor gap are cooperated together to isolate the motor and the target substance in an electric insulation way (figures 7-10);

wherein the structure for sealing the gap communicating with the air gap of the motor is formed in the process of molding the centrifugal liquid collecting chamber from plastic or resin.

In detail, the metal structure part includes, but is not limited to, at least one of a cooling coil, a metal base part, a motor metal housing, a motor end cap, a metal base.

In more detail, the motor end cap or metal base can extend radially outward and then axially upward to form a metal reinforced inner wall of the centrifugal liquid collection chamber (fig. 7).

In more detail, according to the direct drive centrifugal separation apparatus of the present invention, the direct drive centrifugal separation apparatus is manufactured by a method as follows:

the metal structure formed by stamping forming or other manufacturing processes is used as the lining or the reinforcing material of the centrifugal liquid collecting cavity, or used as the motor structure part, or the motor stator manufactured by various processes is placed at the right position in a mould, then plastic or resin is injected, the centrifugal separation equipment main body structure is manufactured by adopting injection molding or other processes, and then the direct-drive centrifugal separation equipment is assembled. The method is particularly suitable for manufacturing gram-scale to kilogram-scale centrifugal separation equipment.

In detail, the plastics of the present invention include, but are not limited to, thermoplastics or thermosets and derivatives thereof.

In detail, the centrifugal liquid collection cavity is an internal circular cavity formed by integrally molding thermoplastic or thermosetting plastic and a cooling coil, a base, a motor metal shell, a motor end cover, a metal base or a motor stator assembly through a molding process, the direct-drive centrifugal separation equipment main body is integrally manufactured as a whole preferably by adopting an integrally molding process technology, and the integrally molding material is preferably a material combining metal and engineering plastic, and more preferably a composite material of unsaturated polyester glass fiber reinforced molding compound (DMC or BMC for short) in thermosetting engineering plastic and steel or aluminum. The selection range of the motor can be increased by using a pure metal forming material, and meanwhile, the safety coefficient of the centrifugal liquid collecting cavity is high, but the centrifugal liquid collecting cavity is not beneficial to corrosion prevention and maintenance; the selection range of the motor is limited by pure engineering plastics, and the safety factor of the centrifugal cavity is relatively reduced. Therefore, the material combining metal and engineering plastic, especially the composite material of BMC and steel or aluminum, combines the advantages of the two materials, and is the best material to use.

As a further optimization of the present invention, for any one of the direct drive centrifugal separation apparatuses of the present invention, the motor rotor that drives the centrifugal drum or centrifugal rotor to perform a solid-liquid centrifugal separation task includes:

a rotor assembly; and moieties as described in (I) and (II) or (II) only:

(I) the metal structure part is used as a motor rotor reinforcing structure and is formed by punching molding or other manufacturing processes;

(II) a plastic-encapsulated structure part molded by plastics or resin and enabling the motor rotor to have a complete structure and functions;

the plastic or resin is used for plastically molding the rotor assembly and the metal structure part or only the rotor assembly by a molding mode so as to form part (figures 7-10) or all (figures 11 and 12) of the supporting part and/or the spacing part of the rotor assembly.

As a further refinement of the invention, the motor stator driving the centrifugal drum or centrifugal rotor to perform a solid-liquid centrifugal separation task comprises:

a stator assembly; and moieties as described in (I) and (II) or (II) only:

(I) a metal structure part which is formed by punching or other manufacturing processes and is used as a motor stator structure;

(II) a plastic-encapsulated structure part which is molded by plastic or resin and enables the motor stator to have a complete structure and functions;

the plastic or resin is used for plastically packaging the stator assembly and the metal structure part in a molding mode or only plastically packaging the stator assembly so as to form part or all of the supporting part of the stator assembly or the centrifugal liquid collecting cavity.

According to the direct-drive centrifugal separation equipment, the motor rotor and the centrifugal drum or the centrifugal rotor can be quickly connected and detached; a small amount of sample can be centrifuged by using multilayer filter paper instead of a filter cloth bag; taking out the obtained solid material together with the rotary drum after the centrifugation is finished, and weighing and metering; after the drum is taken out, the centrifugal liquid collecting cavity and the liquid outflow channel are cleaned, so that the solid-liquid mixture can be completely separated.

In detail, said figures 7 to 9 and the corresponding embodiments thereof illustrate and detail the case where the centrifuge drum interacts with the motor rotor to achieve the locking between the two and to perform the solid-liquid complete separation task, simply by exchanging the centrifuge drum for a centrifuge rotor, which can perform the solid-liquid separation or the stratification task of a plurality of samples.

Has the advantages that:

compared with the prior art, the direct-drive centrifugal separation equipment provided by the invention has the advantages that:

(1) the fixing and taking out of the centrifugal drum or the centrifugal rotor are very quick and convenient;

(2) the centrifugal rotary drums with different volumes can be easily replaced in the same centrifugal machine;

(3) the multi-layer filter paper can be used as a centrifugal filter material, the experimental result is accurate and reliable, and reliable data support can be provided for industrial production;

(4) the manufacturing method is very simple, convenient for industrial production and low in cost;

(5) and the purchase, use, maintenance and cleaning costs of the centrifugal separation equipment are greatly reduced.

Drawings and description of the drawings

FIG. 1 is a diagram of a centrifugal turntable with various connection structures;

FIG. 2 is a diagram of a centrifuge drum with various attachment structures;

FIG. 3 is a centrifugal rotor with various attachment structures;

FIG. 4 is a schematic view of an exemplary connection interaction;

FIG. 5 is a schematic view of a hollow motor rotor with various connection structures;

FIG. 6 is a schematic structural view of example 1;

FIG. 7 is a schematic structural view of example 2;

FIG. 8 is a schematic structural view of example 3;

FIG. 9 is a schematic structural view of example 4;

FIG. 10 is a schematic structural view of example 5;

FIG. 11 is a schematic structural view of example 6;

FIG. 12 is a schematic structural view of example 7;

wherein:

1-1, a centrifugal turntable body; 1-2, a bump 1; 1-3, fixing the mounting hole 1;

1-4, and a protrusion 2; 1-5, fixing a mounting hole 2; 1-6, and a protrusion 3;

1-7, through hole 1; 1-8, through hole 2; 1-9, a through hole 3;

1-10 and a clamping groove 1;

2-1, the bottom of a centrifugal drum; 2-2, a centrifugal drum body; 2-3, a centrifugal drum top cover;

2-4, and a protrusion 4; 2-5, filtering holes; 2-6, a feed hole 1;

2-7, and a protrusion 5; 2-8, groove 1; 2-9, and a protrusion 6;

3-1, a centrifugal rotor body; 3-2, centrifuging the pipe hole; 3-3, a bump 7;

3-4, a buckle 1; 3-5, and a protrusion 8;

4-1, a bump connecting part 1; 4-2, a convex connecting part 2; 4-3, a raised stop arm;

4-4, a buckle 2; 4-5, arc-shaped bulges.

5-1, a hollow rotor body; 5-2, permanent magnet 1; 5-3, and a protrusion 9;

5-4, a bump 10; 5-5, permanent magnet 2; 5-6, a bump 11;

5-7, a clamping groove 2;

6-1, a separate top cover; 6-2, cooling coil pipes; 6-3, chamber wall;

6-4, centrifuging and rotating the drum; 6-5, centrifugal rotating disc; 6-6, a turntable connecting structure;

6-7, permanent magnet; 6-8, a stator assembly; 6-9, a base part;

6-10 of shock-absorbing foot pads; 6-11, fixing screw 1; 6-12, a retainer ring;

6-13, front end cover; 6-14, fan blades; 6-15, fixing screw 2;

6-16, fixing screw 3; 6-17, a centrifugal liquid collection cavity; 6-18, a drum connecting structure;

6-19, an upper bearing; 6-20 parts of motor shaft; 6-21, motor rotor;

6-22, a lower bearing; 6-23, rotor bushing; 6-24 parts of liquid discharge port;

6-25, a top cover fixing structure; 6-26, door lock; 6-27, drum top cover;

7-1, a top cover 1; 7-2, connecting structure 1; 7-3, connecting structure 2;

7-4, cooling coil pipes; 7-5, centrifuging and rotating the drum; 7-6, a centrifugal liquid collection cavity;

7-7, a drum connecting structure; 7-8, a metal magnetic yoke; 7-9, permanent magnets;

7-10, a stator assembly; 7-11, a base part; 7-12, fixing screws;

7-13, a check ring; 7-14, rotor bushing; 7-15, a rear end cover;

7-16, an upper bearing; 7-17, a lower bearing; 7-18 parts of motor shaft;

7-19, O-shaped sealing ring; 7-20 parts of liquid discharge port; 7-21, rotor connection structure;

7-22, a rotary drum top cover; 7-23, the rear end cover extends axially; 7-24, connecting structure 3;

7-25, connecting structure 4;

8-1, a top cover; 8-2, cooling coil pipes; 8-3, centrifuging and rotating the drum;

8-4, a drum connecting structure; 8-5, a metal magnetic yoke; 8-6, a rotor assembly;

8-7, a stator assembly; 8-8, a front end cover; 8-9 parts of a feeding hole;

8-10 parts of fixing screws 1; 8-11, a check ring; 8-12, rotor bushing;

8-13, fixing screw 2; 8-14, a rear end cover; 8-15, lower bearing;

8-16, fixing a screw cap; 8-17, motor shaft; 8-18, an upper bearing;

8-19, a liquid outlet;

9-1, centrifuging a liquid collecting cavity top cover; 9-2, door lock; 9-3, a top cover connecting structure;

9-4, cooling coil pipes; 9-5, centrifuging and rotating the drum; 9-6, a drum connecting structure;

9-7, a motor rotor; 9-8, electric brush; 9-9, a base;

9-10, a top cover fixing structure; 9-11, a drum independent top cover; 9-12, a centrifugal liquid collection cavity;

9-13, rotor connection structure; 9-14, the yoke extends axially; 9-15, permanent magnet;

9-16 parts of liquid discharge port; 9-17, a commutator; 9-18, rotor bushing;

9-19, rotor set screw; 9-20 parts of check ring; 9-21, end cover fixing screws;

9-22 parts of rear end cover; 9-23, motor shaft; 9-24, a metal yoke;

9-25, a metal base; 9-26, an upper bearing; 9-27, a lower bearing;

11-1, a two-in-one top cover; 11-2, centrifuging and rotating the drum; 11-3, a rotor assembly;

11-4, a stator assembly; 11-5, radiating blades; 11-6, an upper bearing;

11-7, a hollow shaft of the motor; 11-8, a lower bearing; 11-9, a base;

11-10 parts of a shock absorption foot pad; 11-11, the lower end part of the rotor assembly; 11-12, a circuit board;

11-13, a front end cover; 11-14, a set screw; 11-15 parts of a rear end cover;

11-16 parts of a liquid outlet; 11-17, a top cover connecting structure; 11-18, a drum connecting structure;

11-19, rotor connection structure; 11-20, a centrifugal liquid collection cavity; 11-21, a vent;

12-1, a two-in-one top cover; 12-2, a top cover connecting structure; 12-3, a front end cover;

12-4, a stator assembly; 12-5, a rotor assembly; 12-6, a base;

12-7, a rear end cover; 12-8, shock-absorbing foot pads; 12-9, a connecting structure;

12-10, fixing screws; 12-11, an upper bearing; 12-12, a centrifugal turntable;

12-13, a lower bearing; 12-14, a centrifugal drum; 12-15, a centrifugal liquid collection cavity;

12-16, a motor hollow rotor; 12-17 and a liquid discharge port; 12-18 and arc-shaped bulges.

Detailed Description

Example 1

The driving system of the embodiment is an external rotor motor, and the detailed structural schematic diagram of the driving system is shown in fig. 6.

As shown in fig. 6, the centrifugal rotor 6-5 and the centrifugal drum 6-4 are separate parts. Wherein, the independent top cover 6-1 for sealing the centrifugal liquid collecting cavity 6-17 is fixed on the top of the cavity wall 6-3 of the centrifugal liquid collecting cavity through a top cover fixing structure 6-25 and is locked by a door lock 6-26; the center of the top cover is provided with a feed inlet. The rotary drum top cover 6-27 of the sealed centrifugal rotary drum, the rotary table connecting structure 6-6 positioned at the outer side of the bottom of the centrifugal rotary drum 6-4 and the centrifugal rotary drum body are manufactured by integral molding; the centrifugal rotating drum is fixedly connected with a rotating drum connecting structure 6-18 positioned at the outer side of the centrifugal rotating disc 6-5 through a rotating disc connecting structure positioned at the outer side of the bottom of the centrifugal rotating drum; the centrifugal liquid collected by the centrifugal liquid collecting cavity 6-17 is discharged from a liquid outlet 6-24 at the bottom and collected in a liquid storage tank for storage, and the connection structure is shown in figures 1-2 and 4-1.

As shown in figure 6, a cooling coil 6-2, a base 6-9, a centrifugal cavity wall 6-3, a front end cover 6-13 and a motor stator assembly 6-8 are integrally formed by plastic packaging materials to form the cavity wall of a centrifugal liquid collecting cavity, and a circular cavity for accommodating an upper bearing 6-19, a lower bearing 6-22 and a motor shaft 6-20 is enclosed in the center of the bottom of the centrifugal liquid collecting cavity; the motor shaft is tightly clamped and arranged in the circular cavity through an upper bearing and a lower bearing which are sleeved at the two ends of the motor shaft, and the inner ring of the lower bearing is pressed by the rotor bushes 6-23, so that the motor shaft is fixed.

As shown in fig. 6, the permanent magnet 6-7 of the motor rotor located at the corresponding position outside the stator assembly 6-8 is fixed on the metal magnetic yoke 6-21, and the metal magnetic yoke 6-21 is connected with the rotor bushing 6-23 by the fixing screw 26-15; the permanent magnet, the metal magnet yoke and the rotor bushing are integrally formed by thermosetting resin to form a motor rotor 6-21, the inner side of the rotor bushing compresses the inner ring of a lower bearing 6-22, the motor rotor is connected to the bottom end of a motor shaft through a fixing screw 36-16 cantilever, and the spacer compresses the rotor bushing under the action of the fixing screw 3.

As shown in fig. 6, the centrifugal rotor 6-5 on the supporting washer 6-12 is attached to the shaft end of the motor shaft by means of a fixing screw 16-11.

Example 2

In the embodiment, the driving system is an external rotor motor, and a detailed structural schematic diagram of the driving system is shown in fig. 7.

As shown in the attached figure 7, the independent top cover 7-1 of the sealed centrifugal liquid collecting cavity 7-6 is mutually rotated and clamped with the connecting structure 17-2 at the top of the centrifugal liquid collecting cavity wall through the connecting structure 27-3 at the outer side thereof to realize the fixation of the top cover (the connecting structure is shown in the attached figures 1-1 and 4-1); the center of the top cover is provided with a feed hole; the drum top cover 7-22 of the sealed centrifugal drum is mutually rotated and clamped with the connecting structure 47-25 at the outer side of the centrifugal drum 7-5 through the connecting structure 37-24 to realize the fixation of the top cover (the connecting structure is shown in the attached figures 1-2 and 4-1).

As shown in figure 7, a cooling coil 7-4, a base 7-11, a stator assembly 7-10, a rear end cover 7-15 and a rear end cover radial and axial extension section 7-23 are integrally formed by plastic packaging materials to form a cavity wall of a centrifugal liquid collecting cavity, and a circular cavity for accommodating a motor shaft 7-18, an upper bearing 7-16 and a lower bearing 7-17 is surrounded in the center of the bottom of the centrifugal liquid collecting cavity; the upper bearing and the lower bearing are respectively sleeved at two ends of a motor shaft, and the motor shaft is arranged in a circular cavity at the center of the bottom of the centrifugal liquid collecting cavity through the lower bearing positioned in a bearing chamber at the inner side of the rear end cover.

As shown in figure 7, a motor rotor which is formed by integrally molding a metal yoke 7-8 with an axial extension of the yoke, a permanent magnet 7-9 and a rotor bushing 7-14 by thermosetting resin is connected to the shaft extension end of a motor shaft 7-18 in a cantilever way by a fixing screw 7-12, and a gasket 7-13 presses the rotor bushing 7-14 under the action of the fixing screw 7-12.

As shown in fig. 7, the centrifugal drum 7-5 is fixedly connected with the drum connecting structure 7-7 located outside the rotor of the motor through the rotor connecting structure 7-21 located outside the bottom thereof (see fig. 1-1 and fig. 4-1). The centrifugal liquid collected by the centrifugal liquid collecting cavity is discharged from a liquid outlet 7-20 at the bottom of the centrifugal liquid collecting cavity and collected in a liquid storage tank for storage.

Example 3

The driving system in this embodiment is an internal rotor motor, and the detailed structural schematic diagram is shown in fig. 8.

As shown in FIG. 8, the connection mode of the top cover 8-1 of the sealed centrifugal liquid collection cavity and the cavity wall is the same as that of the embodiment 2; the connection mode between the centrifugal drum and the drum top cover of the sealed centrifugal drum is the same as that of the embodiment 2; the round hole in the center of the top cover of the sealed centrifugal liquid collecting cavity is a feeding hole 8-9 for solid-liquid mixture to be centrifuged.

As shown in the attached figure 8, the cooling coil 8-2, the stator assembly 8-7 and the front end cover 8-8 are integrally formed by plastic packaging materials to form a cavity wall of a centrifugal liquid collecting cavity, the center of the bottom of the centrifugal liquid collecting cavity is respectively enclosed to form a circular cavity positioned on the inner side and a circular cavity positioned on the outer side, the circular cavity on the inner side is used for accommodating a motor shaft 8-17, an upper bearing 8-18 and a lower bearing 8-15, and the circular cavity on the outer side is used for accommodating an inner rotor of the motor; the upper and lower bearings are respectively sleeved on two ends of a motor shaft, the motor shaft is arranged in a circular cavity in the center of the bottom of the centrifugal liquid collecting cavity through the upper bearing in a bearing chamber positioned on the inner side of the front end cover 8-8, the lower bearing is compressed and protected by the rear end cover 8-14, and the rear end cover is compressed and fixed through the combined action of the fixing nuts 8-16 and the fixing screws 28-13 positioned on the front end cover.

As shown in figure 8, a motor rotor which is formed by integrally molding a metal magnetic yoke 8-5 with an axial extension of the magnetic yoke, a rotor assembly 8-6 and a rotor bushing 8-12 by thermosetting resin is connected to the shaft extension end of a motor shaft 8-17 in a cantilever way by a fixing screw 18-10, and a gasket 8-11 presses the rotor bushing under the action of the fixing screw 18-10.

As shown in fig. 8, the centrifugal drum 8-3 is fixedly connected with the drum connecting structure 8-4 located outside the rotor of the motor through the rotor connecting structure located outside the bottom thereof (the connection manner is the same as that of embodiment 2). The centrifugal liquid collected by the centrifugal liquid collecting cavity is discharged from a liquid outlet 8-19 at the bottom of the centrifugal liquid collecting cavity and collected in a liquid storage tank for storage.

Example 4

The driving system of the embodiment is a disc motor, and a detailed structural schematic diagram is shown in fig. 9.

In this embodiment the cover 9-1 sealing the centrifugal liquid collection chamber and the drum independent cover 9-11 sealing the centrifugal drum are present independently of each other. The top cover of the sealed centrifugal liquid collecting cavity is fixed on the top of the cavity wall of the centrifugal liquid collecting cavity 9-12 through a top cover fixing structure 9-10 and is locked through a door lock 9-2; the drum independent top cover 9-11 of the sealed centrifugal drum 9-5 is fixed by the connecting structure positioned at the outer side of the top cover and the top cover connecting structure 9-3 positioned at the outer side of the top of the centrifugal drum (the connecting mode is the same as that of embodiment 1).

As shown in fig. 9, a cooling coil 9-4, a base 9-9, a metal base 9-25 and a permanent magnet 9-15 fixed on the inner side of the metal base are placed in a mold and integrally molded by a molding compound to form the cavity wall of a centrifugal liquid collecting cavity 9-12; the center of the annular metal base is provided with a circular cavity for accommodating the upper bearing, the lower bearing and the motor shafts 9-23, and the edge of the base, which is close to the base, is provided with through holes which are distributed at equal intervals along the circumference; the electric brush 9-8 is arranged at the inner side of the metal base corresponding to the commutator 9-17; the rear end cover 9-22 is fixed on the metal base by a fixing screw 9-21, and simultaneously compresses the lower bearing and realizes the fixation of the motor shaft.

As shown in fig. 9, a motor rotor 9-7 formed by integrally molding a metal yoke 9-24 having a yoke axial extension 9-14, a coil (not shown), a rotor bushing 9-18 and a commutator 9-17 with thermosetting resin is cantilever-connected to the shaft extension end of a motor shaft 9-23 by a fixing screw 9-19, and a spacer 9-20 is pressed against the rotor bushing by the fixing screw 9-19; the circle at B in the figure shows a sealing structure: the outer side is centrifugally sealed, and the inner side is sealed by an O-shaped ring.

As shown in FIG. 9, the centrifugal drum 9-5 is fixedly connected with the drum connecting structure 9-6 positioned outside the motor rotor 9-7 through the rotor connecting structure 9-13 positioned inside the bottom thereof (the connection mode is the same as that of embodiment 1). The centrifugal liquid collected by the centrifugal liquid collecting cavity 9-12 is discharged from a liquid outlet 9-16 at the bottom of the centrifugal liquid collecting cavity and collected in a liquid storage tank for storage.

Example 5

The driving system of the embodiment is a disc motor, and a detailed structural schematic diagram is shown in fig. 10.

As shown in fig. 10, the centrifugal drum 9-5 and the metal yoke 9-24 are an integral structure, the rotor bushing 9-18, the commutator 9-17 and the coil (not shown) are integrally formed by thermosetting resin, the motor rotor 9-7 is cantilever-connected to the shaft extension end of the motor shaft 9-23 by the fixing screw 9-19, the spacer 9-20 is pressed against the rotor bushing by the fixing screw 9-19, and the lower end of the rotor bushing is pressed against the inner ring of the upper bearing.

As shown in figure 10, the center of the annular metal base 9-25 is provided with a circular cavity for accommodating the upper bearing, the lower bearing and the motor shaft 9-23, and the upper bearing 9-26 and the lower bearing 9-27 of the motor are respectively sleeved at two ends of the motor shaft 9-23 and are arranged in a bearing chamber in the circular cavity.

The structure of the other part of this embodiment is as in embodiment 4.

Example 6

The driving system of the embodiment is a hollow rotor plastic package motor, and the detailed structural schematic diagram is shown in fig. 11.

As shown in the attached figure 11, the two-in-one top cover 11-1 of the embodiment simultaneously seals the centrifugal rotary drum 11-2 and the centrifugal liquid collecting cavity 11-20 in the hollow rotor of the motor; the connection structure at the outermost side and the top cover connection structure 11-17 (the connection mode is shown in figure 1 and figure 4-1) at the top of the hollow rotor of the motor are used for realizing the fixation between the connection structure and the top cover connection structure.

As shown in figure 11, a stator assembly 11-4, a base 11-9 and a front end cover 11-13 are integrally formed by plastic packaging materials to form a main body part of the centrifugal separation system; the front end cover 11-13 is positioned at the lower end of the stator assembly 11-4 and the upper end of the base 11-9 (namely positioned between the two), and is provided with a ventilation opening 11-21; the inside of the stator assembly forms a cylindrical cavity that receives the hollow rotor assembly 11-3 of the electric machine.

As shown in the attached figure 11, a motor hollow shaft 11-7 is arranged in a shaft hole in the center of a front end cover through an upper bearing 11-6 positioned in a bearing chamber on the inner side of the front end cover 11-13, the motor hollow shaft is fixed through a rear end cover 11-15 positioned on a lower bearing 11-8, the edge of the rear end cover is tightly pressed and fixed on the inner wall of a base 11-9 and is further reinforced through a fixing screw 11-14, and the inner side of the rear end cover is connected with a liquid discharge port 11-16.

As shown in fig. 11, the rotor assembly 11-3 is located in a cylindrical cavity inside the stator assembly 11-4, the lower end portion 11-11 of the rotor assembly is funnel-shaped, the funnel mouth of the rotor assembly is connected to the upper end of the hollow shaft 11-7 of the motor, and the outer side of the lower end portion of the rotor assembly, corresponding to the ventilation opening 11-21, is provided with a heat dissipating blade 11-5; the circuit boards 11-12 are positioned in the cavity at the inner side of the front end cover and the outer side of the lower end part of the rotor assembly; the centrifugal drum 11-2 is fixedly connected with the drum connecting structure 11-18 on the inner surface of the hollow rotor of the motor through the rotor connecting structure 11-19 on the outer surface of the centrifugal drum (the connecting mode is shown in figure 1 and figure 4-1).

The centrifugal liquid collected by the centrifugal liquid collecting cavity 11-20 of the hollow rotor flows through the hollow shaft along the direction shown by the arrow, and then is discharged from the liquid outlet 11-16 at the lower end of the hollow shaft and collected in the liquid storage tank for storage.

Example 7

The driving system of the embodiment is a hollow rotor plastic package motor, and the detailed structural schematic diagram is shown in fig. 12.

As shown in FIG. 12, the two-in-one top cover 12-1 of the present embodiment simultaneously seals the centrifugal drum and the centrifugal liquid collecting chamber in the hollow rotor; the connection structure 12-9 at the outermost side and the top cover connection structure 12-2 at the top of the hollow rotor 12-16 of the motor (the connection mode is shown in the attached figures 1 and 4-1) are used for realizing the fixation between the two.

As shown in fig. 12, the stator assembly 12-4, the base 12-6 and the rear end cap 12-7 are integrally formed by molding compound to form a main body of the centrifugal separation system and enclose a cylindrical cavity for accommodating the hollow rotor 12-16 of the motor inside the stator assembly; the hollow rotor 12-16 of the motor is arranged in the shaft hole of the rear end cover through a lower bearing 12-13 positioned in a bearing chamber at the inner side of the rear end cover, the hollow shaft of the motor is fixed through a front end cover 12-3 positioned on the upper bearing 12-11, the front end cover compresses the upper bearing and is fixed at the upper end part of the stator of the plastic package motor through a fixing screw, the rear end cover extends towards the center along the radial direction, and the central end part of the rear end cover is outwards turned along the axial direction and extends into a cylindrical structure to form a liquid discharge port 12-17 of an outlet channel of.

As shown in fig. 12, a rotor assembly 12-5, a metal support member (not shown), a centrifugal turntable 12-12 with a centrifugal drum mounting through hole are integrally formed by plastic molding material to form a hollow rotor 12-16 of the motor; the outer side of the centrifugal drum installation through hole is also provided with a through hole for the circulation of centrifugal liquid; the centrifugal rotating drums 12-14 are fixedly connected with each other through arc-shaped bulges 12-18 on the outer surface of the bottom part of the centrifugal rotating drums 12-12 and through holes on the centrifugal rotating drums 12-12 (the connection mode is shown in the attached figures 1 and 4-3).

Centrifugal liquid collected by a centrifugal liquid collecting cavity 12-15 positioned in the hollow rotor of the motor flows through the rear end cover along the direction shown by an arrow, is discharged from a liquid discharge port 12-17 positioned in the center of the rear end cover and is collected in a liquid storage tank for storage.

Example 8

In this embodiment, the driving system is an external rotor motor, the centrifugal drum is connected and fixed with the drum connecting structure on the motor rotor through the rotor connecting structure located at the outer side of the bottom of the centrifugal drum (the connecting structure is shown in fig. 1 and fig. 4-3), and the structure of other parts is as in embodiment 2.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make modifications and alterations to the present invention in light of the present disclosure.

Claims

1. A direct drive centrifugal separation apparatus, comprising: a motor rotor integrated with the centrifugal turntable and a centrifugal drum or a centrifugal rotor as an independent part; or comprises a motor stator and a motor rotor which is integrated with the centrifugal turntable into a whole;

wherein the centrifuge drum performing a solid-liquid centrifugation task comprises:

a centrifugal drum top cover with a central charging hole for preventing the target substance from overflowing from the front end part of the centrifugal drum body;

a centrifugal drum body for performing a solid-liquid separation function, the cylindrical peripheral wall of which has a filter hole therethrough;

the bottom of the centrifugal drum prevents the target substance from overflowing from the rear end part of the centrifugal drum body;

wherein the centrifuge rotor performing a solid-liquid centrifugation task comprises:

a centrifuge rotor body providing a centrifuge tube bore carrier to which a centrifuge tube is secured;

a centrifuge tube aperture located on the centrifuge rotor body;

a centrifuge tube of suitable structure;

the rotor assembly enables the motor rotor to rotate around the center line of the motor shaft through a rotating force generated by electromagnetic interaction with the adaptive stator assembly;

a rotor assembly support carrying the rotor assembly;

the position of a port of the motor air gap which can lead to one side of the annular groove is higher than the inner surface of the bottom of the annular groove with a liquid discharge port;

wherein a gap in communication with said motor air gap is sealed at any location to one side of the annular recess, said seal isolating the target substance from said motor air gap.

2. A direct drive centrifugal separation apparatus according to claim 1 wherein liquid components centrifugally separated by the centrifugal drum or rotor and flowing into a centrifugal liquid collection chamber are collected and directed in flow direction by the centrifugal drum or rotor, the centrifugal liquid collection chamber comprising:

a top cover having at least a channel for introducing the centrifuged material into the centrifuge region of the rotary centrifuge unit and closing the top end of the wall of the centrifuged liquid collection chamber to prevent the centrifuged material from escaping from the top end thereof;

the centrifugal liquid collecting cavity is an internal cavity surrounded by the top cover, the centrifugal liquid collecting cavity wall and the base part;

a motor stator section providing a mounting area for a motor stator;

3. The direct drive centrifugal separation apparatus of claim 2, wherein the motor stator integrally molded by the plastic encapsulation stator assembly is fixed to or has the stator assembly integrally plastic encapsulated with the base portion at a location of a motor stator region of the centrifugal liquid collection chamber base portion, the motor stator comprising:

4. The direct drive centrifugal separation apparatus of claim 1, wherein: the ratio of the diameter of the centrifugal drum performing the solid-liquid separation task to the effective height thereof for centrifugally separating the solid-liquid mixture is 2-10.

5. The direct drive centrifugal separation apparatus of claim 1, wherein: the motor rotor is an outer rotor, when the driving motor is partially or completely positioned in the center of the inner side of the bottom of the centrifugal liquid collecting cavity, a motor end cover, a base, a metal base or a stator assembly of the motor rotor is integrally formed by thermosetting or thermoplastic plastics to form the cavity wall of the centrifugal liquid collecting cavity; the motor outer rotor cantilever is connected with the motor shaft extension end, and the upper bearing and the lower bearing are positioned in a bearing chamber of a central cavity surrounded by the stator assembly, the end cover, the plastic package material and the base at the bottom of the integrally formed centrifugal liquid collecting cavity or in a bearing chamber in the center of the metal base;

6. The direct drive centrifugal separation apparatus of claim 1, wherein: when the motor rotor is an inner rotor, a disc-shaped metal component serving as a reinforcing component and an inner rotor magnetic loop covers the upper surface of the whole rotor magnetic yoke and wraps part or all of the stator magnetic yoke; the disk-shaped metal component, the rotor magnet yoke and the connecting structure are integrally formed by thermosetting or thermoplastic plastic in a plastic package mode to form a motor rotor cantilever which is connected to the extension end of the motor shaft; the upper bearing and the lower bearing of the motor rotor are positioned in a bearing chamber of a central cavity surrounded by an end cover or a metal base and a plastic package material at the bottom of the integrally formed centrifugal liquid collecting cavity, and the motor rotor is positioned in an annular cavity surrounded by the stator assembly and the plastic package material;

7. The direct drive centrifugal separation apparatus of claim 1, wherein: when the motor rotor is a disc type motor rotor, the motor rotor is selected from any one of rotor disc type motors on the two sides of an upper rotor, a lower stator or a middle stator, the whole or part of the disc type motor is positioned on the inner side of the bottom of the integrally formed centrifugal liquid collecting cavity, and the diameter of the upper rotor is larger than that of the stator; a disc-shaped metal component serving as an upper rotor magnetic loop covers the upper surface of the whole rotor magnetic yoke and wraps part or all of the stator magnetic yoke; the disk-shaped metal component, the rotor magnet yoke and the connecting structure are integrally formed by thermosetting or thermoplastic plastic in a plastic package mode to form a motor rotor cantilever which is connected to the extension end of the motor shaft; the upper bearing and the lower bearing of the motor rotor are positioned in a bearing chamber of a central cavity enclosed by the stator assembly and the plastic package material or the metal base;

8. The direct drive centrifugal separation apparatus of claim 2, wherein: the centrifugal liquid collecting cavity of the direct-drive centrifugal separation equipment comprises the following structural parts (I) and (II):

the plastic or resin plastically seals and connects each metal structure into a centrifugal liquid collecting cavity with a complete structure and a function in a molding mode or simultaneously plastically seals each metal structure and a stator assembly which is integrated with the base part into a whole structure so as to form the centrifugal liquid collecting cavity with the complete structure and the function;

the plastic packaging structure part and the sealing of the motor gap are cooperated together to ensure that the motor and the target substance are isolated in an electric insulation manner;

9. The direct drive centrifugal separation apparatus of any one of claims 1 to 8, wherein: the motor rotor for driving the centrifugal drum or the centrifugal rotor to perform a solid-liquid centrifugal separation task comprises:

a rotor assembly; and moieties as described in (I) and (II) or (II) only:

the plastic or resin is used for plastically packaging the rotor assembly and the metal structure part in a molding mode or only plastically packaging the rotor assembly so as to form part or all of the supporting part and/or the spacing part of the rotor assembly.

10. A direct drive centrifugal separation apparatus according to claim 3, wherein: the motor stator for driving the centrifugal drum or the centrifugal rotor to execute the solid-liquid centrifugal separation task comprises:

a stator assembly; and moieties as described in (I) and (II) or (II) only: