CN107159319B

CN107159319B - Fluid channel, motor thereof and solid-liquid separation system

Info

Publication number: CN107159319B
Application number: CN201610123714.0A
Authority: CN
Inventors: 唐凌霄; 杨开富
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-07
Filing date: 2016-03-07
Publication date: 2020-03-10
Anticipated expiration: 2036-03-07
Also published as: CN107159319A

Abstract

The invention relates to a fluid channel, a motor with the fluid channel and a solid-liquid separation system with the motor, which are characterized in that the fluid channel at least comprises a rotating part and a static part, wherein the rotating part at least comprises a liquid collecting cavity, a flow guide ring, a partition plate and at least one circle of through holes, which have different functions and are mutually connected and take a motor shaft as a central shaft; the static part comprises an annular concave cavity and a pipeline enabling liquid to flow to the collecting bottle, wherein an upper opening of the static part is connected with a lower opening of the flow guide ring of the rotating part in a sealing mode. The invention has the advantages that: the liquid flows out of the channel of the solid-liquid separation system more smoothly without being disturbed by the centrifugal force; meanwhile, the system integrates the collection and the transportation of liquid after solid-liquid separation with the rotor and the stator of the motor, simplifies the manufacturing and assembling process, can overcome various defects or shortcomings of various existing solid-liquid separation equipment, is convenient to manufacture and maintain, saves energy, reduces consumption and is easy to clean and verify.

Description

Fluid channel, motor thereof and solid-liquid separation system

Technical Field

The invention relates to a fluid channel, a motor with the fluid channel and a solid-liquid separation system with the motor. This solid-liquid separation system belongs to the centrifuge field.

Background

During laboratory bench and pilot plant studies, the most commonly used solid-liquid separation equipment is primarily centrifuges of various specifications or buchner funnel plus filter flask combinations, which are more commonly used in bench studies. To simulate the actual conditions in production and to provide the necessary data for the centrifugation operation for production, centrifuges are more desirable.

However, the existing commonly used centrifuges are formed by separately arranging and reassembling a driving device (mainly a motor) and a solid-liquid separation device (mainly a liquid collection cavity and a centrifugal rotary drum), and the equipment has the defects or disadvantages of being too complicated and heavy in structure, too large in noise and vibration, too high in energy consumption, complex in manufacturing process, inconvenient to maintain, difficult in equipment cleaning and verification and the like, and cannot completely meet the requirement of completely separating solid-liquid mixtures in laboratory pilot scale and pilot scale tests.

Disclosure of Invention

The purpose of the invention is as follows:

the invention aims to provide a motor with a fluid channel rotating part and a static part and a solid-liquid separation system with the motor, wherein the motor is designed by integrating liquid collection and transportation with a motor rotor and a motor stator. The system can overcome various defects or defects of various conventional centrifuges or solid-liquid separators, and can more perfectly 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 defects of various existing solid-liquid mixture separation equipment, the invention provides a direct-drive solid-liquid separation system which is designed into an integrated structure by collecting and conveying liquid and carrying out motor rotor and stator, and the system is structurally mainly characterized by comprising a fluid conveying channel consisting of a rotating part and a static part. The fluid channel comprises at least:

(1) a rotating part:

the rotating part at least comprises four parts which have different functions and are mutually connected and take the motor shaft as a central shaft:

a liquid collection chamber for collecting liquid, the liquid collection chamber having a circular shape with an open end;

the annular flow guide ring is used for guiding the flow direction of the liquid and is formed by enclosing an inner cylinder and an outer cylinder;

the outer edge is connected with the junction of the liquid collecting cavity and the outer ring of the guide ring, the center is provided with a motor shaft mounting hole (106), and the liquid collecting cavity and the guide ring are driven to rotate around the motor shaft by a spacing plate (110);

at least one circle of through holes (104, 105) which are arranged between the inner ring and the outer ring of the guide ring and are positioned on the wall of the liquid collecting cavity and/or the partition plate.

The inner ring (202) of the flow guide ring is positioned on the inner side of the circular partition plate, the outer ring (201) is positioned at the approximate junction of the liquid collection cavity and the partition plate, and the inner ring and the outer ring form an annular flow guide ring. Due to the effect of gravity, the centrifugal liquid enriched by the liquid collection chamber is transported into the annular cavity of the stationary part by the annular flow guide ring enclosed by the inner side of the outer ring and the outer side of the inner ring.

(2) A stationary portion:

the stationary part comprises a bottomed annular cavity (407) surrounded by two cylinders, an inner (406) and an outer (404), for receiving the liquid guided by the deflector ring of the rotating part, and a pipe (405) at the bottom of the annular cavity for flowing the liquid to the collector bottle, through which the centrifuged liquid flows from the annular cavity of the stationary part to the collector bottle. The open end of the annular concave cavity of the static part is hermetically connected with the open end of the flow guide ring of the rotating part.

The sealing connection between the deflector ring of the rotating part and the annular cavity of the stationary part in the invention adopts a preferred axial structure, and can adopt a secondary radial structure or a structure between the axial structure and the radial structure according to the requirement.

In the present invention, it is preferable that the spacer of the rotating part has a conical boss (107) in the center thereof, the center of which is a motor shaft, and the motor shaft mounting hole (106) is located in the center of the conical boss. At least one circle of through holes which take a motor shaft as a central shaft and are positioned between the inner ring and the outer ring of the flow guide ring are also distributed on the partition plate of the rotating part along the circumferential direction, wherein the circle of through holes (104) at the outermost edge is positioned at the approximate junction of the liquid collection cavity and the partition plate, and the through holes can be also used as a connecting and fixing structure of the centrifugal rotary drum. Due to the blocking effect and the centrifugal force effect of the conical boss, liquid can be thrown to the inner side wall of the liquid collecting cavity and flows to the annular concave cavity of the static part through the through hole and the flow guide ring under the action of self gravity.

The liquid collecting cavity of the rotating part is internally provided with a bulge, a groove, a clamping groove, a buckle or a composite structure of two or more of the bulge, the groove, the clamping groove and the buckle which are connected and fixed with the centrifugal drum, the structure which does not depend on a third tool such as a fixing screw and the like enables the arrangement and the replacement of the centrifugal drum to be very simple, and the obtained centrifugal solid can be directly and accurately weighed together with the centrifugal drum without transferring the obtained solid after the centrifugal drum is taken out (the weight of the centrifugal drum minus the weight of the centrifugal drum and the filter paper or the filter cloth is the weight of the centrifugal solid), so that the centrifugal operation is convenient. The liquid collecting cavity is provided with a structure which prevents the radial movement of the rotor unit and is connected with and fixed with a bulge (108), a groove, a clamping groove, a buckle or a composite structure of two or more of the bulge, the groove, the clamping groove and the buckle, and preferably has a positioning bulge (composed of 203 and 204) with a step-shaped structure which prevents the axial movement of the rotor unit, particularly preferably a step-shaped bulge (204) with the outer side higher than the inner side (figure 3) and the total number of the bulges is equal to the total number of the permanent magnets of the rotor unit, so that the positioning bulge (204) with the lower inner side is used for positioning the magnetic yoke of the rotor, and the positioning bulge (203) with the upper outer side protruding into the permanent magnet mounting hole is used for positioning the permanent. The stepped projection has the dual function of preventing axial and radial movement of the rotor unit and may be located at either end of the outer side wall of the liquid collection chamber and is therefore more preferred. The inner side of the liquid collecting cavity comprises an open end face (103) of the liquid collecting cavity, the inner side wall (102) of the liquid collecting cavity, the inner surface of the partition plate and the inner surface of the conical boss, and the outer side of the liquid collecting cavity comprises an open end face of the liquid collecting cavity and the outer side wall (109) of the liquid collecting cavity.

In the present invention, the rotating part at least including the liquid collecting cavity, the deflector ring and the partition plate is preferably integrally molded (fig. 1, 2 and 3), more preferably, the motor rotor unit is integrally molded after being fixed to the partition plate (fig. 7), and particularly, the rotating part and the motor rotor unit are integrally molded (substantially as shown in fig. 6).

The molding material in the present invention is preferably, but not limited to, non-magnetic conductive material such as metallic aluminum and its alloy, non-magnetic conductive steel, and non-metallic polymer such as ABS, PC-ABS, DMC or BMC (unsaturated polyester glass fiber reinforced molding compound), engineering plastic or reinforced plastic such as nylon, or composite material of metal and non-metal. The molding includes, but is not limited to, stamping, casting, injection molding, etc.

The stationary part is preferably integrally molded with the motor base and/or the motor housing (fig. 4 and 8), for example, the stationary part is integrally cast or stamped with the motor base and/or the motor housing by using metal aluminum, steel, iron and other materials (fig. 9), more preferably, the stationary part is integrally molded with the front end cover and/or the rear end cover of the motor (fig. 9), and particularly, the stationary part is integrally molded with the motor stator unit (fig. 10), so that the plastic molding and assembly of the motor and the improvement of the insulation grade are facilitated, and the centrifugal separation of the flammable and explosive solid-liquid mixture is particularly effective. Fig. 4 shows in fact the structure of the stationary part, the motor base and/or motor housing, the motor front and/or rear end cover, the bearing housing, the motor shaft mounting hole as an integral part of the moulding.

The motor rotor of the invention at least comprises: a rotating portion of the fluid channel recited in claim 1; a rotor unit comprising at least, but not limited to, a magnetically permeable member part and a member part generating magnetic force by permanent magnets or electricity, wherein the rotor unit is preferably located outside the liquid collection chamber, the rotor unit being any one of a radial air gap flux or an axial air gap flux configuration. The rotor of the electric machine is particularly preferably formed by integrally molding the rotating portion and the rotor unit (for example, a yoke made of a silicon steel plate plus a permanent magnet).

The motor stator at least comprises: a stationary portion of the fluid passageway of claim 1; a stator unit comprising at least, but not limited to, a magnetically permeable member portion and a member portion that generates magnetic force by permanent magnets or electricity, the stator unit being any of a radial air-gap flux or axial air-gap flux configuration. The motor stator is preferably formed by integrally molding the stationary part, the base and/or the end cover with a stator unit (such as a yoke of a silicon steel plate and a conductive winding).

The motor of the invention at least comprises: the rotor of an electric machine having a rotating portion with fluid passages of claim 7; the motor stator with fluid passage static portion of claim 8; the base and/or the end cover are/is positioned at the bottom side of an internal cavity which is defined by the motor stator and is used for accommodating the motor rotor; the motor shaft, the bearing chamber and the bearing are positioned at the bottom side of an internal cavity which is defined by the motor stator and is used for accommodating the motor rotor, and the center of the base and/or the end cover at the inner side of the fluid channel static part; and other attachments. The motor rotor is fixedly connected with the shaft extension end of the motor shaft through a motor shaft mounting hole in the center of the rotating part partition plate in a cantilever manner. When the stator coil is electrified, the magnetic force generated by the stator coil acts on the rotor to drive the rotor to rotate around the motor shaft, so that the centrifugal drum is driven to coaxially rotate at the same speed.

The solid-liquid separation system of the present invention at least comprises: the electric machine of claim 9; the centrifugal drum is fixed on the inner side of the liquid collecting cavity and coaxially rotates along with the motor rotor at the same speed; one end of the cover is connected with the hinge, and the other corresponding end of the cover is connected with the top end of the motor stator part in a locking manner; a solid-liquid separation system rotating speed control unit; a shock absorbing footing system; and other attachments.

Has the advantages that:

compared with the prior art, the fluid channel, the motor with the fluid channel and the solid-liquid separation system of the motor with the fluid channel have the advantages that:

(1) the channel for the liquid to flow out of the solid-liquid separation system is smoother and hardly disturbed by the centrifugal force;

(2) the placing in and taking out of the centrifugal rotary drum are very convenient;

(3) the system has ultrahigh coaxiality, and runs stably and quietly, so that vibration and noise caused by coaxiality deviation of conventional solid-liquid separation equipment are avoided;

(4) the liquid collection and delivery and the integrated design of the motor rotor and the stator enable the equipment manufacture and installation to be simple, the weight of the whole machine is reduced, and the carrying is convenient.

Drawings and description of the drawings

FIG. 1 is a schematic view of a liquid collection chamber and a partition plate of a rotary part of a fluid channel;

FIG. 2 is a schematic view of a deflector ring of a rotating portion of a fluid passage;

FIG. 3 is a schematic view of a stepped convex structure of the outer side wall of the liquid collection chamber of the fluid passage;

FIG. 4 is a schematic view of the structure of the stationary portion of the fluid passage;

FIG. 5 is a schematic view of a stator structure of a motor;

FIG. 6 is a schematic view of a rotor structure of the motor;

FIG. 7 is a schematic view of a fluid passage rotating portion circular spacer;

FIG. 8 is a schematic view of a motor end cap with a stationary portion having a fluid passage;

FIG. 9 is a schematic structural diagram of the motor 1 with a fluid channel;

fig. 10 is a schematic structural view of the motor 2 with a fluid channel.

Wherein:

101. positioning holes; 102. The inner side wall of the liquid collecting cavity; 103. An open end face;

104. an outer edge through hole; 105. An inner edge through hole; 106. A shaft mounting hole;

107. a conical boss; 108. A protrusion; 109. A liquid collection chamber outer side wall;

110. a circular spacer plate; 201. A diversion ring outer ring; 202. A diversion ring inner ring;

203. an outer positioning boss; 204. An inner positioning bulge; 401. A magnet yoke positioning projection;

402. positioning the through hole; 403. A vent hole; 404. A stationary portion outer ring;

405. a pipeline; 406. A stationary portion inner ring; 407. A stationary portion;

408. a motor shaft hole; 409. A motor housing; 501. A base;

502. a stator assembly; 503. A liquid blocking boss; 504. A fluid conduit (same as 405);

601. a card slot; 602. A rotor assembly; 701. A rotor unit positioning hole;

702. an inner ring positioning hole; 801. A stator unit positioning hole; 901. Damping feet;

902. a set screw; 903. A motor hollow shaft; 1001. A rear end cap;

1002. a set screw; 1003. A front end cap.

Detailed Description

Exemplary embodiments of the fluid channel, the motor having the fluid channel, and the solid-liquid centrifugal separation system according to the present invention will be described with reference to the accompanying drawings, wherein like elements are designated by like reference numerals.

In the present specification, the terms have the following meanings:

"circumferential" refers to the circumferential direction of a circle perpendicular to the centerline of the motor shaft formed by using a point on the centerline of the motor shaft as the center of the circle;

"axial" refers to the direction of the centerline of the motor shaft;

"radial" means a direction perpendicular to the centerline of the motor shaft and passing through the center of the circle on the motor shaft;

"molding" refers to the process of obtaining an object of a target geometry by using a mold in a manufacturing process, including but not limited to stamping, casting, injection molding, and the like.

Example 1

The present embodiment is a motor stator having a fluid passage static portion, and the fluid passage static portion shown in fig. 4 is used.

The integrally molded fluid passage stationary portion member includes: a cylindrical motor housing (409) and a yoke positioning projection (401) located inside the housing for positioning the stator unit; a bottomed annular cavity is formed by the outer ring (404) and the inner ring (406), and a fluid passage stationary portion (407) is formed by the annular cavity and a pipe (405) located at the bottom of the annular cavity; the inner side of the annular cavity inner ring is provided with a motor shaft mounting hole (408) with a bearing chamber, and the outer ring of the annular cavity extends outwards to form a part for connecting a motor shell, and is provided with a vent hole (403) and a positioning through hole (402).

The stator unit is clamped into the motor shell, and the injection molded motor stator with the fluid channel static part is roughly as shown in figure 5, and the top of the motor stator is provided with a liquid blocking boss (503) for preventing liquid from flowing in, and the bottom of the motor stator is provided with a base (501) for enlarging the contact surface.

Example 2

This embodiment is a motor stator having a fluid passage static portion, and the fluid passage static portion shown in fig. 8 is used.

The integrally molded fluid passage stationary portion member includes: a bottomed annular cavity is formed by the outer ring and the inner ring, and a fluid passage stationary portion (407) is formed by the annular cavity and a pipe (405) located at the bottom of the annular cavity; the inner side of the annular cavity inner ring is provided with a motor shaft mounting hole (408) with a bearing chamber, and the annular cavity outer ring extends outwards to form a part for fixing the electronic unit, and is provided with a vent hole (403) and a stator unit positioning hole (801).

After the stator unit is fixed to the stator unit positioning hole (801) by using a fixing screw or other methods, the injection molded motor stator with the fluid channel static part is roughly as shown in fig. 5, and the top of the motor stator is provided with a liquid blocking boss (503) for preventing liquid from flowing in, and the bottom of the motor stator is provided with a base (501) for enlarging the contact surface.

Example 3

In this embodiment, a motor rotor having a fluid passage rotating portion is adopted, and the fluid passage rotating portion shown in fig. 1, 2, and 3 is used.

The integrally molded fluid passage rotary member includes: the guide ring is formed by encircling an outer ring (201) and an inner ring (202); a circular partition plate (110) driving the liquid collection cavity and the guide flow to rotate around the motor shaft, wherein the center of the circular partition plate is provided with a conical boss (107) with a motor shaft mounting hole (106), and at least one circle of liquid outflow pore passages which take the motor shaft as a central line and comprise an inner edge through hole (105) and an outer edge through hole (104) are positioned on the circular partition plate between the conical boss (107) and the bottom of the inner wall (102) of the liquid collection cavity; and a cylindrical liquid collecting cavity, wherein the outer edge radius of an open end surface (103) of the liquid collecting cavity is larger than that of a liquid blocking boss (503) which prevents liquid from flowing into the top of the motor stator, and the end surface (103) is provided with a positioning hole (101). The outer side wall (109) of the liquid collecting cavity is provided with an axial protrusion (108) for preventing the circumferential movement of the rotor unit, a circle of stepped positioning protrusions consisting of outer positioning protrusions (203) and inner positioning protrusions (204) are arranged at the position close to the end part of the open end surface (103), and the axial height of the outer positioning protrusions (203) is larger than that of the inner positioning protrusions (204).

After the rotor unit is fixed to the fluid channel rotating part through the protrusions (108) and the stepped protrusions (203+204), the injection molded motor rotor with the fluid channel rotating part is substantially as shown in fig. 6, and the top of the open end of the motor rotor is provided with a clamping groove (601) for connecting and fixing the centrifugal rotor.

Example 4

In this embodiment, a motor rotor having a fluid passage rotating portion is provided, and the fluid passage rotating portion circular partition plate (110) shown in fig. 7 is used.

The integrally molded fluid passage rotary part circular spacer plate (110) has: a conical boss (107) with a motor shaft mounting hole (106) positioned in the center of the circular spacing plate; a circle of outer edge through holes (104) taking the central line of the motor shaft as a central shaft are used as liquid outflow pore passages; and a rotor unit positioning hole (701) positioned at the outer side of the outer edge through hole (104), and a guide ring inner ring positioning hole (702) positioned at the inner side.

After the rotor unit is fixed on the circular partition plate (110) through the rotor unit positioning hole (701), the injection molded motor rotor with the fluid channel rotating part (including the liquid collecting cavity and the guide ring (201+202)) is roughly as shown in fig. 6, and the top of the open end of the motor rotor is provided with a clamping groove (601) for connecting and fixing the centrifugal drum.

Example 5

The structure of the motor with a fluid channel is schematically shown in fig. 9, and the fluid channel static part is integrally molded with the front end cover of the motor.

As shown in fig. 9, the motor stator unit (502), the base (501), the rear bearing chamber, the rear end cap (not shown), and the vent hole (403) are integrally molded by molding compound to form a motor stator assembly, and the top end of the motor stator assembly has a liquid blocking boss. The hollow shaft (903) of the motor is erected in the rear bearing chamber through a rear bearing, and is fixed through a front bearing by a front end cover which is clamped in a cavity on the inner side of the base (501) and is provided with a fluid channel static part (407). An inner cavity surrounded by the stator assembly is provided with a rotor having a fluid passage rotating portion across an air gap.

As shown in fig. 9, the circular spacer plate (110) is integrally molded with: the motor shaft guide ring comprises a guide ring consisting of an inner ring (202) and an outer ring (201), an outer edge through hole (104), a conical boss positioned in the center and a motor shaft mounting hole in the center of the boss.

As shown in fig. 9, the motor rotor unit (602) and the circular partition plate (110) are integrally molded by plastic package material to form a motor rotor assembly, the top of the motor rotor assembly is provided with a slot (601) for connecting and fixing the centrifugal drum, and the outer radius of the open end surface (103) of the motor rotor assembly is larger than or equal to that of the liquid blocking boss at the top of the stator assembly.

As shown in fig. 9, the rotor assembly is fixed to the shaft extension end of the hollow shaft (903) of the motor through the mounting hole of the motor shaft by the cantilever connection of the fixing screw (902), and the deflector ring of the rotating part is hermetically connected with the annular concave cavity of the stationary part (407).

Example 6

The present embodiment is a motor with a fluid channel, the structure of which is schematically shown in fig. 10, and the fluid channel static part (407) is integrally molded with the motor stator.

As shown in fig. 10, the motor stator unit (502), the base (501), the front bearing chamber, the front cover (1003), the vent (403), the fluid channel static part (407) and the centrifugal liquid pipe (405) are integrally molded by a molding compound to form a motor stator assembly, and the top end of the motor stator assembly is provided with a liquid blocking boss. The motor hollow shaft (903) is erected in the front bearing chamber through a front bearing, and is fixed on the base (501) through a rear bearing and a rear end cover (1001) through a fixing screw (1002). An inner cavity surrounded by the stator assembly is provided with a rotor having a fluid passage rotating portion across an air gap.

As shown in fig. 10, the circular spacer (110) is integrally molded with: the motor shaft guide ring comprises a guide ring consisting of an inner ring (202) and an outer ring (201), an outer edge through hole (104), a conical boss positioned in the center and a motor shaft mounting hole in the center of the boss.

As shown in fig. 10, the motor rotor unit (602) and the circular partition plate (110) are integrally molded by plastic package material to form a motor rotor assembly, the top of the motor rotor assembly is provided with a slot (601) for connecting and fixing the centrifugal drum, and the outer radius of the open end surface (103) of the motor rotor assembly is larger than or equal to that of the liquid blocking boss at the top of the stator assembly.

As shown in fig. 10, the rotor assembly is fixed to the shaft extension end of the hollow shaft (903) of the motor through the mounting hole of the motor shaft by the cantilever connection of the fixing screw (902), and the deflector ring of the rotating part is connected with the annular concave cavity of the stationary part (407) in a sealing manner.

The embodiments described above are intended to facilitate the understanding and appreciation of the invention by those skilled in the art. 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 any improvements and modifications to the present invention by those skilled in the art according to the present disclosure should be within the scope of the present invention.

Claims

1. A fluid channel, comprising at least:

(1) a rotating part:

the rotating part at least comprises the following parts which have different functions and are mutually connected and take the motor shaft as a central shaft:

the outer edge of the baffle is connected with the junction of the liquid collecting cavity and the outer ring of the guide ring, the center of the baffle is provided with a motor shaft mounting hole, and the baffle drives the liquid collecting cavity and the guide ring to rotate around the motor shaft;

at least one circle of through holes which are arranged between the inner ring and the outer ring of the diversion ring and are positioned on the wall of the liquid collection cavity and/or the partition plate;

a rotor unit including at least a magnetically permeable member portion and a member portion generating a magnetic force by a permanent magnet or electricity;

wherein the rotor unit is positioned on the outer side wall of the liquid collecting cavity;

(2) a stationary portion:

the stationary portion includes:

a closed-end annular cavity surrounded by the inner and outer cylinders for receiving the liquid guided by the deflector ring of the rotary part, and a pipe at the bottom of the annular cavity for flowing the liquid to the collector bottle;

the open end of the annular concave cavity of the static part is hermetically connected with the open end of the diversion ring of the rotating part;

the motor stator is composed of a stator unit, a motor shell, a stator bottom, a base and a vent hole;

wherein the stator unit comprises at least a magnetically conductive member part and a member part generating magnetic force by permanent magnets or electricity, the cylindrical motor housing supports the stator unit across a motor air gap, the stator bottom provides a bearing chamber to support the bearing and motor shaft, and the vent hole can be used as a drain passage for leaked liquid.

2. The fluid channel of claim 1, wherein: the through holes of the rotating part are positioned on the partition plate and distributed along the circumferential direction by taking the motor shaft as a central shaft, wherein a circle of through holes at the outermost edge are positioned at the junction of the liquid collecting cavity and the partition plate.

3. The fluid channel of claim 1, wherein: the center of the rotating part partition plate is provided with a conical boss which takes a motor shaft as a central shaft, and a motor shaft mounting hole is positioned in the center of the conical boss.

4. The fluid channel of claim 1, wherein: the inner side of the liquid collecting cavity of the rotating part is provided with a bulge, a groove, a clamping groove, a buckle or a composite structure of two or more of the bulge, the groove, the clamping groove and the buckle which are connected and fixed with the centrifugal drum; the outer side of the liquid collecting cavity of the rotating part is provided with a bulge, a groove, a clamping groove, a buckle or a composite structure of two or more of the bulge, the groove, the clamping groove and the buckle which are connected with and fixed with the rotor unit.

5. The fluid channel of claim 1, wherein: the rotating part at least comprises a liquid collecting cavity, a flow guide ring, a partition plate and a through hole, or the motor rotor unit is fixed on the partition plate and then integrally molded, or the rotating part and the motor rotor unit are integrally molded.