JPH02248688A - Fluid transfer device - Google Patents

Abstract

PURPOSE:To reduce the leakage flux and rotate a rotary vane with non-contact and non-seal by locating rotors which consist of conductive cylinders inside of a stator for generating the rotating magnetic field, and locating magnetic cylinders at parts inner than the rotors. CONSTITUTION:At the time of rotating a pump vane 34, conductive cylinders 35, 36 are respectively rotated by the rotating magnetic field of a stator 26 at the center in a inner cylinder casing 27 in a little space between the inner cylinder casing 27 and magnetic cylinders 48, 49. At this stage, about the magnetic flux generated from the stator 26, since the magnetic cylinders 48, 49 works as magnetic passages, the flux which cross the rotor is increased, and since the leakage flux is reduced, conductive cylinders (rotors) 35, 36 are rotated under the floated condition. Next, at the time of standing, the rotary vane is supported at shaft supporting parts 39, 40 by the resiliency of permanent magnets 41, 42 and 43, 44 with non-seal. the rotary vane is thus rotated with non-contact and non-seal to make the maintenance-free.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fluid transfer device in which a rotating shaft of a pump blade that transfers a fluid (liquid or gas) rotates without contacting a bearing.

[Conventional technology]

As a pump motor having a structure similar to that of the present invention, a slurry pump motor 10 as shown in FIG. 16 proposed earlier by the present inventor is known. As the main power, a normal general-purpose three-phase motor (hereinafter referred to as the main motor) that can be operated in liquid is provided with levitation stators 12.13 symmetrically on both sides of the stator 11, and the levitation stators 12.1
3, the levitation rotor 14.15 consists of a conductor tube.
The pump drive shaft 18, to which the pump blade 17 is fixed at one end, is floated from the bearing 19.20 by the floating stator 12.13 and the floating rotor 14.15.

[Problem that the invention seeks to solve]

However, in the slurry pump motor IO, in order to increase the repulsion force, the floating rotor 14.15
Since it is necessary to increase the slip (S) of the floating stator 15, 16 in the opposite direction to the rotation direction of the main motor
Since the drive shaft 18 is controlled by applying excitation to the bearing and lowering its frequency, the drive shaft 18 is barely in contact with the bearings 19 and 20, and it is difficult to say that it is floating. The rotational speed of the motor decreased significantly, and the excitation current of the levitation stator became excessive due to the large cage, and it was found that it had little practical value.

The present invention was developed in view of these circumstances, and it is possible to maintain an appropriate gap between the drive shaft and the bearing, suppress the excitation current of the stator, and also facilitate the removal of the rotating parts. The purpose of the present invention is to provide a fluid transfer device that is easy to use.

[Means for solving problems]

The invention according to claim 1 in accordance with the above object includes: a stator that generates a rotating magnetic field that is placed outside a cylindrical main casing; a pump blade that is placed inside the casing; a rotor made of a conductive cylinder made of a non-magnetic material with an outer diameter slightly smaller than the inner diameter of the fixed main casing, a rotation center shaft of the pump blade, and a bearing that supports both ends of the rotation center shaft with a gap between them. and a magnetic cylinder made of a magnetic material and fixed to the side casing and having an outer diameter slightly smaller than the inner diameter of the rotor.

Further, the fluid transfer device according to claim 2 which meets the above object includes a stator that generates a rotating magnetic field in the same direction, which is disposed facing each other on both outer sides of the cylindrical main casing;
A rotor consisting of a pump blade having a symmetrical structure arranged inside the stator, and a conductive cylinder made of a non-magnetic material having an outer diameter slightly smaller than the inner diameter of the main casing fixed to the pump blade and corresponding to the stator. and a rotation center axis located at the center of the pump blade, and a magnetic cylinder made of a magnetic material and having an outer diameter slightly smaller than the inner diameter of each of the rotors and fixed to the side casing. ing.

The fluid transfer device according to claim 3 is the fluid transfer device according to claim 2 or 3, wherein an outer casing is provided on the outside of the cylindrical main casing, and the stator is sealed. The structure is organized.

Furthermore, the fluid transfer device according to claim 4 is the fluid transfer device according to claim 3, in which a supporting member for suspension is provided on the side casing or the outer casing, and the fluid is transferred by a pump blade. The inlet for the fluid is provided in the axial direction, and the outlet is formed at a plurality of locations around the pump blade, so that it can be used as an agitator.

Here, in the fluid transfer device according to claims 1 to 4 above, in order to make the rotating part non-contact with its surroundings, it is necessary to levitate the rotating part to a certain extent, and the rotating part must be slightly floated. For this reason, it is preferable to make the blades, rotor, and rotational center shaft from materials with low specific gravity to make them lightweight.

In addition, if the pump blade is driven from the rotational force generating section through the rotational center shaft, the rotational center shaft requires strength and cannot be made lightweight. Therefore, if the rotational force generating section is fixed to the pump blade, the rotational center shaft can be rotated. It is only necessary to have enough strength to support this part so that it does not come into contact with the inner cylinder casing when stopped. Therefore, it is also possible to make the rotation center shaft hollow, which can reduce the weight and prevent it from being immersed in liquid. You can also take advantage of the buoyancy.

In the above-mentioned fluid transfer device, if there is a magnetic body in the rotating part, the rotational force will increase, but the attractive force will also increase more than the rotational force, so the magnetic body is not provided in this part.

However, if there is no magnetic material on the secondary side, the magnetic flux from the stator that intersects with the non-magnetic conductor in the rotating part will decrease, resulting in a decrease in rotational force and an increase in the excitation current on the stator side. It is preferable that the body is fixed to a side casing or the like with a gap between the inside of the conductor cylinder made of a non-magnetic material constituting the rotor, and thereby the excitation current that causes reactive current can be reduced. As a result, the conductor cylinder rotates in the gap between the magnetic body and the stator.

When a spiral type pump blade is used, as in the fluid transfer device described in claim 2, the pump blade is designed to suck liquid from both sides and discharge it in the circumferential direction, that is, to use a double suction type to balance the left and right sides. Make sure to keep it away from heat so that no thrust is applied to the wing shaft.

In addition, when the pump blade is used as an axial flow blade to inhale from one side and discharge from the other, thrust is applied to the rotation center shaft, so a disk-shaped permanent magnet is installed at the shaft end and bearing to receive this thrust without contact. It is also possible to prevent axial contact due to thrust by repelling each other.

In addition, with such a structure, a fluid transfer device as described in claim 1 can also be placed in the middle of the main pipe.

The rotating part of the pump, especially when used as an agitator, must be structured so that the rotating part and its auxiliary equipment can be easily taken out.
For example, the conductor cylinder for pump blade power generation and the rotation center axis are free from the casing, and the magnetic cylinder is attached to the side casing, so that when the side casing is removed, the equipment inside the inner cylinder casing can be easily accessed to the outside. get retrieved,
It is also possible to make the inside of the inner cylinder casing completely hollow.

[Effect]

The operation of the fluid transfer device according to claims 1 to 4 will be explained in more detail: - Basic conditions for generating a repulsive force between the rotor and the stator during boat fishing and lifting the rotor from the inner lower surface of the stator. is that Rmx S > l.

Here, Rm (R ml , Rm 1,
Rm is the magnetic Reynolds number; ) The rotational force increases,
Since there is a maximum value for the generation of repulsive force, the rotation speed of the magnetic field is selected to be an appropriate value (for example, the maximum value).

If Rm is constant, the larger the rotor current or the larger the corresponding area between the rotor and the stator core, the larger the repulsive force and rotational force will be.

Figure 5 shows the suction force between the stator and rotor as +F (upward on the vertical axis) and the repulsive force as -F (downward on the vertical axis).
(horizontal axis) and a glass showing these relationships, the origin P1 is the slip S=, that is, the rotor is stopped, and the Pt point is the point where the rotor speed is the same as the synchronous speed of the stator, that is, the slip S-0. do.

Curve A shows the case where Rm t is small and the slip changes from attraction to repulsion at point S8, and at point S81, the rotor current is saturated and the repulsion force becomes constant.

Curve B shows the case where Rm, >Rm, and the repulsive force becomes constant at the slip point Ss.

Curve C shows that Rms > Rml and the repulsive force is constant at the same slip Ss point as curve B, but the saturation current of the rotor at that time is larger than that of the 8th curve, and therefore the repulsive force is larger than that of the 8th curve.

In all curves A, B, and C, the rotor is made of a non-magnetic conductive material, and if the rotor contains a magnetic material, a strong attractive force will be generated, and almost no repulsive force will appear overall.

Based on these conditions, in the present invention, if the power supply voltage and frequency are the same, the inner diameter of the stator is larger than the inner diameter of the stator of a general-purpose motor of the same capacity, and the number of poles is appropriately small. ing.

However, even if the rotor is a completely non-magnetic conductor, when the rotation speed of the rotor approaches the synchronous speed, an attractive force will be generated.For this reason, in the present invention, pump blades are connected, which applies a load. Due to the occurrence of peri-S, a repulsive force is generated between the rotor and stator,
This allows the rotor, which is made of a conductive cylinder, to rotate in a floating state.

In order to increase efficiency, the greatest effect is to reduce the gap between the stator core and the fixed magnetic material on the secondary side, but for this reason, reducing the thickness of the conductor cylinder as the rotor reduces its saturation current and increases the repulsive force. decreases.

Therefore, in the liquid conveying device according to claims 1 to 4, since the rotor made of a conductive cylinder is disposed inside the stator that generates a rotating magnetic field, a rotational force is generated in the rotor. Moreover, since a fixed magnetic cylinder made of magnetic material is placed inside the stator, the magnetic flux generated from the stator becomes a magnetic path, so the magnetic flux that crosses the rotor increases, and leakage magnetic flux decreases. In the fluid transfer device according to claim 2,
The symmetrical structure of the pump blades makes it possible to offset the thrust loads generated by this.

In the fluid transfer device according to claim 3, since the stator has a closed structure, it is also possible to use the fluid transfer device by placing it in liquid, for example.

In the fluid transfer device according to claim 4, a plurality of outlets for the fluid transferred by the pump blades are formed around the periphery, so that the fluid sucked in from the axial direction is discharged from the outlets and re-entered the inlet. It can be used as an efficient stirrer.

〔Example〕

Next, an example in which a spiral double suction type pump blade is used will be described as an example of the basic structure of the present invention embodying the present invention with reference to the attached drawings.

First, as shown in FIGS. 1 and 2, a spiral double suction pump 23 having suction ports in both directions, which is an example of a fluid transfer device according to an embodiment of the present invention, is shown. FIG. 2 is a sectional view taken along the line AA in FIG. 1.

The outer casing 24 of the main body of the pump 23 is made strong, but there are no particular restrictions on the material.An inner casing is an example of a casing to which the stator mounting base 25 is fixed and the stator 26 is fixed to this mounting base. The inner surface of the stator core 28 is brought into close contact with the outer periphery of the stator core 27. The inner cylinder casing 27 is made of non-magnetic, high electrical resistance material,
Make it as thin as the strength allows. This is to make the magnetic gap between the inner cylinder casing 27 and magnetic cylinders 48 and 49 (described later) as small as possible.

A suitable number of liquid circulation holes 30, 31 with filters are formed in the inner cylinder casing 27 at appropriate locations, and a part of the liquid conveyed by the pump is circulated between the inner cylinder and the outer cylinder casing 27, 24. This is to immerse the stator 26 in it, cool the stator, and make the stator out of the scope of the explosion-proof test. Therefore, the stator coil windings are coated with a special material to provide sufficient insulation, and the thickness is several times that of a general-purpose motor to withstand wear.

Note that if the carrier liquid cannot be used to cool the stator 26, the liquid circulation hole 30 with a filter is used.
31 is not provided, and the cooling liquid is supplied from the outside to the inner cylinder and outer cylinder casing 2.
7.2.4 A coolant inlet pipe 32 and an outlet pipe 33 are provided to supply and circulate the coolant. The hydraulic pressure within the inner cylinder casing 27 and between the inner cylinder and outer cylinder casing 24 is always kept equal.

The stator 26 is centrally distributed and installed symmetrically,
A spiral double suction type pump blade 34 having a structure in which two symmetrically formed pump blades are stacked is installed in the center of the inner cylinder casing 27.

The outer diameter of the pump blade 34 is made slightly smaller than the inner diameter of the inner cylinder casing 27.

Conductor cylinders 35 and 36, which are made of a hollow non-magnetic material and have the same outer diameter as this pump R34 and an appropriate thickness, and constitute a rotor are fixed symmetrically to the pump blades 34.

Its length is such that it completely corresponds to the stator core 28.

The conductor cylinders 35 and 36 generate rotational force and repulsive force.

Both sides of the outer casing 24 are connected to the side casing 37.3.
Closes at 8. The side casings 37, 38 are connected to the outer casing 24 with bolts 37a, 38a so that they can be removed.

The side casing 37.38 has a shaft bearing part 39.4 inside the center.
A ring-shaped permanent magnet 41.42 is provided on the inner surface of the recessed part of 0.
At the same time, cylindrical permanent magnets 43 and 44 whose poles are aligned so as to repel the permanent magnets 41 and 42, respectively, are fixed at the end of the rotation center shaft 45, and the liquid is injected into the casing from the outside. Suction pipes 46 and 47 for inhaling the air are attached to the side casings 37 and 38, respectively.

Magnetic cylinders 48 and 49 are fixed inside the side casings 37 and 38, respectively, with their axes aligned, their outer diameters are slightly smaller than the inner diameters of the conductor cylinders 35 and 36, and their thickness is such that they saturate the magnetic flux from the stator. The thickness is such that it does not interfere with the stator core, and the length is such that it can completely accommodate the stator core.The material is a
! ! It should have a large m-rate and suppress the generation of eddy currents.

The pump blade 34 and the conductor cylinders 35 and 36 are made as light as possible, and the rotation center shaft 45 is passed through the center of the blade and the pump blade 34 is fixed thereto.

The rotational center shaft 45 is sufficient as long as it can support the weight of the pump blade 34 when its rotation stops; however, in order to reduce the weight, it may be hollow to generate buoyancy in the liquid. .

The repulsive force generated by the permanent magnets 41, 42 and 43, 44 needs only to be enough to maintain a small gap between them and make them non-contact.

With this structure, when the pump blade 34 rotates, the conductor cylinders 35, 36 are connected to the inner cylinder casing 27 and the magnetic cylinder 48, respectively.
It rotates in the center of the inner cylinder casing 27 with a slight gap between the permanent magnets 41 and 49 and the permanent magnet 43 when stopped.
．． It is supported by the bearing parts 39 and 40 in a non-contact manner due to the repulsive force of the bearing part 44.

In addition, in this stopped state, the conductor cylinder 35, 36 and the magnetic cylinder 48, 49 are in the upper part, and the pump blade 34, the conductor cylinder 35, 36, and the inner cylinder casing 27 are in the lower part. The inner diameter and diameter of each are determined so that they do not come into contact with each other.

Next, an experimental example of the pump 23 configured as described above will be described.

The stator has an inner diameter of 82mm, and the power source is AC220V3.
Using φ6GHz, it is 0 when converted to a normal general-purpose motor.
．． Two 75Kw2P pumps were used symmetrically, and a single spiral pump blade was used.

Conductor inner cylinder - 3 dragon thickness A1 cylindrical Magnetic material cylinder - 51 thickness Laminated electromagnetic steel plates And assuming that the rotation center axis is at the center of the entire device,
Each gap was set as follows.

Between the wing shaft and the bearing: 0°9as (the bearing is a pentagonal inner cylinder casing - between the four cylinders: approx. 1.2 times) Between the thick body cylinder and the magnetic cylinder: approx. The total weight of the rotating part is approximately 6 pupils, and the reaction force on the pump blades is approximately 1.5 kg.
Therefore, a total load of approximately 7.51 kg will be applied.

Next, in order to measure the levitation of the rotational center shaft, we used a differential transformer type measuring instrument with an accuracy of 1 to 100, and operated using room temperature water as the fluid. It looks like they are in contact, so no permanent magnets are used)
The gap at that time was set to 0.

When operation started under the above conditions, the rotational center shaft rose about 450 μm from the bearing, the shaking at that time was less than 10 μm, and the rotation speed was 2500 RRM (slip of about 30% or more).

The efficiency as a pump was about 60%. This experimental example was a test result of a modified general-purpose motor, and it was confirmed that the rotor floated and rotated without contact. As a result of the study, it seems that the weight of the rotating part can be reduced to about 3 kg, and if the design of the stator is optimized, the flying height can be further increased.

3 and 4 are the conductor cylinders 35 and 36 shown in FIG. 1.
A state in which skinny grooves 50 are respectively provided is shown.

The skew groove 50 serves to rectify the current flowing in the conductor cylinder 35 (same as 36), and can be expected to increase rotational force and repulsive force.
6 is required to be penetrated, and the gap is preferably filled with a non-magnetic electrically non-conductive synthetic resin or the like.

In FIG. 1, 51 indicates a discharge pipe, 52 indicates a stator core end, and 53 indicates a stator supply wire.

Next, a description will be given of a pump 54 according to a first embodiment in which an axial flow type is used as a pump vane using a fluid transfer device according to an example of the present invention shown in FIGS. 6, 7, and 8.

The basic technology is exactly the same as the pump 23 shown in FIG. 1, but an axial flow blade 55 is used as the pump blade, and the stator 56, conductor cylinder 57, and magnetic cylinder 58 are 1&[l.

In this embodiment, one or several units are inserted in series with a flanch in the middle of the target liquid transport pipe (hereinafter referred to as the main pipe), and the target liquid is continuously stirred while being transported.

Since one side of the outer casing 59 is the suction side (IN) and the other side is the discharge side (OUT), the rotational center shaft 60 receives thrust, so the thrust is not contacted inside the shaft bearing 61 as shown in FIG. The disk-shaped permanent magnet 62 for receiving is attached by utilizing the repulsive force with the permanent magnet 63 attached to the end of the rotation center shaft 60, and as described above, the rotation of the axial flow blade 55 is stopped. At times, in order to support the whole without contact, ring-shaped permanent magnets 64 are attached to both ends of the rotational center shaft 60, and permanent magnets 65 that generate a corresponding repulsive force are attached to the shaft bearing part 61 (the other side is also the same).

The bearings 61, 66 are mounted on central bosses 71, 72, which are each supported by several arms 69, 70 extending from the side casings 67, 68.

Since the target liquid passes between the arms 69 and 70, the cross section of the arms should have a shape with little resistance in the flow direction, for example, as shown by the arrow P shown in FIG.

Note that FIG. 9 shows an example in which the pump 54 is inserted in series in the middle of a main pipe 73, where 73a and 73b indicate flanges for connection.

FIG. 10 and FIG. 11 show the pump 23 or 54.
, when the target liquid is mixed with slurry, etc., the liquid passes smoothly through the bearing part to reduce wear on the bearing part 39 (same for 40) or 61 (same for 66), respectively. .

As shown in the figure, in FIG. 1O, the bypass pipe 74
In FIG. 11, a bypass hole 75 is provided to allow the target liquid to flow into the interior of the shaft bearing portion 39.61.

Next, FIGS. 12 to 15 show fluid transfer according to the present invention!
J? An example in which & is applied to the stirring device 76 will be described.

FIG. 12 is an overall vertical cross-sectional view of the agitation device 76, and the pump blade 77 is of a spiral double saccilane type similar to that shown in FIG. 1.

The agitator main body 7g consisting of a fluid transfer device is reinforced with a reinforcing frame 79, and a connecting shaft 80, a reinforcing ring 81, and a hanging boss 82 are constructed.
, the main body 78 is assembled from the tank ceiling with a hanging shaft 84 which is an example of a hanging support member.
The fluid transfer device is used as a stirrer in the target liquid.

A bearing/sealing device 85 is installed at a portion where the hanging shaft 84 penetrates the ceiling of the stirring tank. Since the hanging shaft 84 only needs to be moved up and down and does not need to be rotated, sealing is easy.

Power supply to the stator 86 of the stirrer main body 78! 5187 comes out from the stator, runs along the reinforcing frame 79, reaches the hanging shaft 84, passes through the shaft, comes out of the tank, and connects to the power source.

The discharge ports 88 from the pump blades 77 are provided at several locations around the entire circumference of the outer casing 89, as shown in FIG.

That is, in this device, the target liquid is poured onto the stirrer main body 78,
It sucks in from below and discharges in all directions from the center.

Here, Fig. 13 is a sectional view taken along line D-D in Fig. 12, Fig. 14 is a sectional view taken along E-E in Fig. 12 (however, the cross-section of the pump blade is not shown), and Fig. 15 is the main A cross-sectional view of the device installed in a stirring tank is shown. In the figure, 90 indicates the inner casing, and 9
1 is the side casing, 92 is the bearing part, 93 is the bearing support arm, 94 is the boss, 95 is the rotation center shaft, 96
97 is the conductor cylinder, 97 is the magnetic cylinder, 98 is the stirring tank ceiling plate, 99 is the rank attached to the hanging shaft 84, l
OO indicates a pinion that meshes with the rack 99, 101 indicates a driving device for the pinion, and 102 indicates a bearing/sealing device.

In each figure, arrows indicate the flow direction of the liquid, arrow R indicates the flow direction of the target liquid, and arrow r indicates the flow direction of the cooling liquid.

Although each of the above embodiments shows a case where a liquid is used as the fluid, the present invention is also applicable to a case where a gas is used as the fluid.

〔Effect of the invention〕

In the fluid transfer device according to claims 1 to 4, (1) the rotor blades can be rotated without contact, (2) there is no seal, and (2) the rotating part can be removed. Therefore, it has a long service life and can be maintenance-free in some cases.

Therefore, it can be used as a pump for the chemical industry where leakage is a concern, a pump for nuclear power where leakage must be absolutely prevented, an agitator for pharmaceuticals and biotechnology, or a pump for slurry liquid, but since there are no sliding parts, retains long lifespan,
It can exhibit excellent effects.

[Brief explanation of drawings]

FIG. 1 is an overall cross-sectional view of a fluid transfer device according to a first embodiment of the present invention applied to a pump, FIG. 2 is a cross-sectional view taken along arrow A-A in FIG. 1, and FIG. A side view of the conductor cylinder of the transfer device with a skinny groove, Fig. 4 is a sectional view taken along arrow B-B in Fig. 3, and Fig. 5 shows the relationship between the attraction force, repulsion force, and slip between the stator and rotor. graph,
FIG. 6 is an overall sectional view of the fluid transfer device according to the second embodiment of the present invention when it is applied to a pump, FIG. 7 is a sectional view taken along arrow C-C in FIG. 6, and FIG. 8 is a sectional view of the pump. FIG. 9 is a side view showing the pump in use,
FIG. 10 is a partial sectional view showing another example of the shaft bearing part of the pump shown in FIG. 1 above, FIG. 11 is a sectional view showing another example of the shaft bearing part of the pump shown in FIG. 6 above, and FIG. An overall sectional view of a fluid transfer device according to a third embodiment of the invention applied to an agitation device, FIG. 13 is a sectional view taken along the line DD in FIG. 12, and FIG. EE sectional view, FIG. 15 is a schematic sectional view of the stirring device attached to a stirring tank, and FIG. 16 is a sectional view of a conventional slurry pump motor. Explanation of f symbols] 23-m-...Pump, 24--Outer casing, 25--Mounting on stand, 26--Stator 27--...・Cylindrical casing, 28
・・・・・・Stator core, 29-・----
・Magnetic cylinder, 30.31 ・・・・−・−Liquid circulation hole, 3
2-・・−・・Cooling liquid inlet, 33 ・・−・−・−
Coolant outlet, 34--...- pump blade, 35.36
−・・・・・・Conductor cylinder, 37.38 ・・・・・・・・
・Side casing, 39.40 --- Bearing part, 41-44 --- Permanent magnet, 45 ---
・−Rotation center axis, 46.47 ・−・−・Suction pipe, 48.49−・・・Magnetic cylinder, 50 ・−・−
...Skinny groove, 51-------Discharge pipe, 5
2-...Stator core end, 53-...
Supply tM, 54-...Pump, 55...
...Axial flow blade (pump blade), 56...Stator, 57...Conductor cylinder, 58...
・・Magnetic cylinder, 59 ・−・−・・Outer casing, 6
0・−・−・−・Rotation center axis, 61−・・・Bearing part, 62–65・・・・Permanent magnet, 66 ・
・・・−・−・・Shaft bearing part, 67.68 ・・・・・・・−
Side casing, 69.70-- Arm, 7
L72 ・・・－・・・Boss, 73 ・・・－・・・
・Main pipe, 74・−・・−・Bypass pipe, 75−・・−
...Bypass hole, 76 ... Stirring device, 77 ... Pump blade, 78 ... Stirrer body, 79 ... Reinforcement Frame, 80...
...Connection shaft, 81 ...Reinforcement ring, 82 ...Hanging boss, 83 ...
・・Suspension arm, 84 ・・Suspension shaft, 85 ・・
-... Bearing part/sealing device, 86... Stator, 87... Power feeding part, 88...
-...-Discharge port, 89-...Outer casing, 90...-Inner casing, 91
......Side casing, 92--Bearing portion, 93--Bearing support arm, 94...-
...-Boss, 95 ...-Rotation center axis, 96-
......-Conductor cylinder, 97 ...--Magnetic cylinder, 98--...-Agitating tank ceiling plate, 99...--
...Rank, 100 ...Pinion, 1
01-・-・-・-Drive device, 102 ・・・・・-・
Bearing and seal! J-Oki Agent Patent Attorney Chubu Fujio Figure 13

Claims (4)

[Claims] (1) A stator that generates a rotating magnetic field that is placed outside a cylindrical main casing, a pump blade that is placed inside the casing, and an outer diameter that is slightly smaller than the inner diameter of the main casing that is fixed to the pump blade. A rotor consisting of a conductive cylinder made of a non-magnetic material with a diameter, a rotational center shaft of the pump blade, a bearing supporting both ends of the rotational center shaft with a gap, and an outer diameter slightly smaller than the inner diameter of the rotor. and a magnetic cylinder made of a magnetic material fixed to a side casing. (2) a stator that generates a rotating magnetic field in the same direction, which is placed facing each other on both outer sides of the cylindrical main casing;
A rotor consisting of a pump blade having a symmetrical structure arranged inside the stator, and a conductive cylinder made of a non-magnetic material having an outer diameter slightly smaller than the inner diameter of the main casing fixed to the pump blade and corresponding to the stator. A fluid having a rotational center axis located at the center of the pump blade, and a magnetic cylinder made of a magnetic material and having an outer diameter slightly smaller than the inner diameter of each of the rotors and fixed to the side casing. Transfer device. (3) The fluid transfer device according to claim 1 or 2, wherein an outer casing is provided outside the cylindrical main casing, and the stator has a sealed structure. (4) A support member for suspension is provided on the side casing or the outer casing, an inlet for the fluid transferred by the pump blade is provided in the axial direction, and a plurality of outlets are formed around the pump blade. A fluid transfer device used as an agitator according to item 3.