JPH09163675A - Magnet pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the dimension small in the longitudinal direction of a rotor shaft so as to decrease the size by attaching a second magnet which generates magnetic force to the first magnet and generates force to a stator, being disposed within the magnetic fields of the first magnet and the stator, to the rotor core member. SOLUTION: A pump case 2 is coupled with a motor case 5, and an impeller 4 is arranged rotatably within the pump chamber 12 of the pump case 2. A first magnet which generates a magnetic field is attached to the impeller 4. A second magnet 10, which generates magnetic force to the first magnet 8 and also generates magnetic force to the stator 9, is attached to the rotor core member, being disposed within the magnetic field of the first magnet 8 and within the magnetic field of the stator 9. Hereby, the size reduction can be achieved by making the dimension small in the longitudinal direction of the rotor shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet pump for cooling an engine used for cooling an engine with a fluid such as water.

[0002]

2. Description of the Related Art As a magnet pump for cooling an engine, which cools an engine with a fluid such as water, a rotor is arranged inside a stator, and a magnet coupling is arranged on a rotor shaft coupled to the rotor. ,
It is known that a pump chamber accommodating an impeller is arranged on an extension line of a rotor shaft. In the magnetic coupling, one coupling magnet coupled to the rotor shaft and the other magnetic coupling coupled to the impeller are arranged in non-contact with each other.

When the stator is energized, the rotor rotates due to the rotating magnetic force generated by the stator, so that one coupling magnet rotates with the rotor, and the magnetism generated by one coupling magnet causes the other coupling to rotate. Since the magnet rotates while being attracted, the impeller to which the other coupling magnet is attached rotates in the pump chamber, thereby sucking the fluid into the pump chamber and discharging it from the pump to the outside.

[0004]

However, in the magnet pump described above, the rotor and the rotor are arranged on the rotor shaft.
Since the other coupling magnet and the pump chamber accommodating the impeller are arranged side by side, the overall length of the rotor, the length of both coupling magnets, and the length of the impeller There is a problem in that the length dimension is determined, which makes the entire magnet pump large and it may be difficult to arrange it so as not to contact other auxiliary equipment in the engine room. The solution was a challenge.

[0005]

SUMMARY OF THE INVENTION A magnet pump according to the present invention comprises:
An object of the present invention is to provide a magnet pump that can be made compact by reducing the dimension of the rotor shaft in the length direction.

[0006]

Configuration of the Invention

[0007]

In a magnet pump according to a first aspect of the present invention, a motor case, a stator arranged inside the motor case and generating a magnetic field by energization, and a motor case are rotatably supported. Rotor shaft, a rotor core member attached to the rotor shaft, a pump case coupled to the motor case, an impeller rotatably arranged in a pump chamber of the pump case, and a magnetic field attached to the impeller. Attached to the rotor core member for generating the first magnet in the stator magnetic field and the first magnet.
The second magnet is arranged in the magnetic field of the magnet and has a second magnet that generates a magnetic force with respect to the stator and a magnetic force with respect to the first magnet.

In the magnet pump according to claim 2 of the present invention, a pump case having a fluid inlet and a fluid outlet connected to the pump chamber and an impeller shaft rotatably arranged in the pump chamber of the pump case are provided. And an impeller having an impeller body rotatably supported by an impeller shaft, a motor case coupled to the pump case, a stator arranged in the motor case and generating a magnetic field by energization, and a motor case. Rotor bearing disposed on one end side of the motor, a second rotor bearing disposed on the other end side of the motor case, and a rotor rotatably supported by the first rotor bearing and the second rotor bearing. A shaft, a rotor core member coupled to the rotor shaft, a first magnet attached to the impeller body of the impeller to generate a magnetic field, and a rotor core member attached to the rotor core member. A second magnet that is arranged in the magnetic field of the stator and in the magnetic field of the first magnet and that includes a second magnet that generates a magnetic force that can be attracted to the stator and a magnetic force that can be attracted to the first magnet. It is characterized by

In the magnet pump according to the third aspect of the present invention, a pump case having a fluid inlet and a fluid outlet, and a partition wall member coupled to the pump case and having a pump chamber between the pump case and the pump case are formed. And an impeller shaft rotatably arranged in the pump chamber of the pump case, an impeller body rotatably supported by the impeller shaft, and a fluid passage forming portion provided in the impeller body. An impeller, a motor case coupled to the partition member,
A stator that is arranged in the motor case and generates a magnetic field when energized, a first rotor bearing that is arranged at one end of the motor case, and a second partition member that is mounted at a position facing the first rotor bearing. Rotor bearing, a rotor shaft rotatably supported on the extension line of the impeller shaft by the first rotor bearing and the second rotor bearing, and a rotor core member arranged inside the stator and coupled to the rotor shaft. When,
First attached to the impeller body of the impeller to generate a magnetic field
And a first magnet that is attached to the rotor core member in an annular shape that extends from the rotor core member side to the outside of the impeller body and is in non-contact with the stator in the magnetic field of the stator and in non-contact with the first magnet. And a second magnet that is disposed in the magnetic field and that generates a magnetic force that can be retained by the magnetic force of the stator and a magnetic force that can be retained by the magnetic force of the first magnet. There is.

[0010]

In the magnet pump according to claim 1 of the present invention, a magnetic force is generated with respect to the stator on the side of the first magnet and the rotor core member attached to the impeller and on the side of the first magnet on the side of the pump chamber. A magnetic coupling is formed with the second magnet that generates a magnetic force, and the rotor core member is rotated by the magnetic force generated by the stator, and the magnetic force generated by the second magnet attracts the first magnet. The rotation of the rotor core member is transmitted to the impeller. Therefore, the rotor, the coupling magnet, and the impeller are not arranged side by side on the rotor shaft.

In the magnet pump according to claim 2 of the present invention, the first magnet mounted on the impeller body rotatably supported in the pump chamber of the pump case,
Magnet coupling by a second magnet that generates a magnetic force that can be attracted to the stator on the rotor core member side that is rotatably supported by the motor case and a magnetic force that can be attracted to the first magnet on the pump chamber side. Is formed, the rotor core member is rotated by the magnetic force generated by the stator, and the first magnet is attracted by the magnetic force generated by the second magnet, whereby the rotation of the rotor core member is transmitted to the impeller. Therefore, the rotor, the coupling magnet, and the impeller are not arranged side by side on the rotor shaft.

In the magnet pump according to claim 3 of the present invention, the first magnet mounted on the impeller body rotatably supported in the pump chamber of the pump case,
By a second magnet that is held by the magnetic force of the stator on the rotor core member side that is rotatably supported by the first and second bearings on the motor case and that is held by the magnetic force of the first magnet on the pump chamber side. , The magnetic coupling is formed, the rotor core member is rotated by the magnetic force generated by the stator, and the first magnet is attracted by the magnetic force generated by the second magnet, so that the rotor core member is rotated by the impeller. Transmitted. Therefore, the rotor, the coupling magnet, and the impeller are not arranged side by side on the rotor shaft.

[0013]

1 to 4 show one embodiment of a magnet pump according to the present invention.

The illustrated magnet pump 1 is mainly composed of a pump case 2, a partition member 3, an impeller 4, a motor case 5, a rotor shaft 6, a rotor core member 7, a first magnet 8, a stator 9 and a second magnet. The first magnet 8 and the second magnet 10 form a magnetic coupling.

In the pump case 2, since the outer peripheral portion of the pump case body 2a formed in a substantially U shape is connected to the partition member 3 via the first O-ring (O ring) 11 for keeping the watertightness. A pump chamber 12 is formed in a space between the pump case body 2 a and the partition member 3.

The pump case 2 has a pump case body 2a provided with a fluid inlet 2b and a fluid outlet 2c. The fluid inlet 2b and the fluid outlet 2c communicate with the pump chamber 12, respectively. There is.

A first impeller bearing 13 is attached to the pump case 2 substantially at the center of the pump case body 2a, and the first impeller bearing 13 of the partition wall member 3 is attached.
The second impeller bearing 14 is mounted at a position facing each other. An impeller shaft 15 provided in the impeller 4 is rotatably inserted through the first and second impeller bearings 13 and 14.

The impeller shaft 15 is rotatably supported on one side by a first impeller bearing 13 and on the other side by a second impeller bearing 14, and has a flange 15 provided at the center thereof.
One side of a is a small diameter shaft portion 15b, and the other side of the flange 15a is a large diameter shaft portion 15c.
The small-diameter shaft portion 15b is rotatably supported on the flange 15a side by the third impeller bearing 16 and on the second impeller bearing 14 side by the fourth impeller bearing 17. The third and fourth impeller bearings 16 and 17 include the impeller 4
The impeller body 4a provided in the is connected.

The impeller main body 4a is formed in a substantially cylindrical shape, and the first magnet 8 is attached to one end side of the partition wall member 3 which is the second impeller bearing 14 side. On the other end side which is the impeller bearing 13 side, there is formed a fluid flow path forming portion 4b which projects in a disk shape radially outward of the impeller body 4a.

The first magnet 8 is a ring-shaped magnet, and as shown in FIG. 2, the first magnet body 8b is provided outside the cylindrical first magnet iron core 8a.
Is provided. The first magnet body 8b has N poles and S poles sequentially magnetized in the circumferential direction.

Since the first magnet 8 is arranged inside the partition member 3 via a predetermined air gap, its magnetism passes through the partition member 3 to the second magnet 10 which will be described later. Occurs.

As shown in FIG. 4, the fluid channel forming portion 4b has a central channel 4b1 formed in a concave shape at the center and a plurality of sides connected to the outer edge of the central channel 4b1. The lateral flow path 4b2 is formed, and the lateral flow path 4b2 is formed.
Is communicated only by the impeller cover 4b3 with the outside of the central flow passage 4b1 and the fluid flow passage forming portion 4b.

The impeller 4 receives the magnetic force generated by a second magnet 10 which will be described later via the partition member 3, and the first magnet 8 rotates while being held by the second magnet 10 to rotate inside the pump chamber 12. In order to generate a negative pressure in the fluid, the fluid stored in the fluid tank that is connected to the fluid introduction port 2b is introduced into the fluid introduction port 2b, and from the central introduction part 4b1 of the fluid flow path forming part 4b to the lateral introduction part The fluid is guided to the fluid outlet 2c via 4b2, and the fluid is pressure-fed to an engine such as an engine connected to the fluid outlet 2c outside the magnet pump 1.

The motor case 5 is connected to the partition member 3 via a second O-ring (O-ring) 18 for keeping watertightness. In the motor case 5, a stator 9 is attached to the inside of a case body 5a formed in a substantially cylindrical shape, and an end cover 19 is joined to one end side of the case body 5a.

The stator 9 is provided with a core 20 having a coil winding portion 20a having a predetermined number of slots, and a stator coil 21 wound around each coil winding portion 20a of the core 20. ing. The stator coil 21 is electrically connected to the external wirings 22 and 22 via a connection wiring (not shown) for each slot, and the external wirings 22 and 22 are electrically connected to a magnet pump controller (not shown). A magnetic force (S pole) is generated inside the stator 9 by sequentially supplying a current to each slot of the stator coil 21 from the controller.

The end cover 19 is formed in a lid shape that closes one end side of the case body 5a, and is connected to one end side of the case body 5a via a third O-ring (O ring) 23. A first rotor bearing 24 is attached to the center of the end cover 19, and a disc-shaped circuit board 25 is attached near the first rotor bearing 24. The circuit board 25 has a cylindrical magnet 2 for rotation detection.
6 is coupled to a rotor shaft 6 which will be described later, and three Hall elements 27 are arranged outside the cylindrical magnet 26 without contacting the cylindrical magnet 26. Since the three Hall elements 27 are electrically connected to the above-described magnet pump controller, respectively, when the cylindrical magnet 26 rotates together with the rotor shaft 6, the rotational position detection and the rotational speed of the rotor shaft 6 are detected. Is supplied to the magnet pump controller, and feedback control is performed by the magnet pump controller.

A second rotor bearing 28 is attached to the partition wall member 3 at a position facing the first rotor bearing 24, and the second rotor bearing 28 and the first rotor bearing 24 serve as the second rotor bearing 28. The rotor shaft 6 is rotatably supported.

The rotor shaft 6 is formed in a stepped shape, and is arranged on an extension line of the impeller shaft 15. A rotor core member 7 is connected to the rotor shaft 6.

The rotor core member 7 has a rotor core member main body 7a formed in a substantially cylindrical shape and arranged on the inner peripheral side facing the core 20 of the stator 9, and the rotor core member main body 7a.
The second magnet 10 is attached to the outside of the.

The second magnet 10 is provided with a second magnet body 10a which is formed in an annular shape in a lengthwise manner from the rotor core member body 7a to the impeller body 4a of the impeller 4. As shown in FIG. 3, the magnet 10 of the second magnet body 10a has a rotor core member 7a.
Second magnet iron core 1 having a cylindrical shape provided on the side
Since 0b is fitted and fixed to the outer edge portion of the rotor core member main body 7a, it is integrally connected to the rotor core member 7.

The second magnet 10 has an N pole and an S pole on the outer peripheral side of the second magnet body 10a near the rotor core member 7.
The poles are sequentially magnetized, and the N and S poles are sequentially magnetized on the inner peripheral side near the impeller body 7a. An outer peripheral portion of the second magnet 10 close to the rotor core member 7 is arranged so as to be separated from the core 20 of the stator 9 with a predetermined air gap therebetween, and an impeller of the second magnet 10 is provided. The inner peripheral portion near the main body 7a is arranged with a predetermined air gap between the outer peripheral edge of the first magnet 8 and the outer wall of the first magnet 8 with respect to the core 20 of the stator 9. To generate magnetism without contact with the first magnet 8 through the partition member 3 without contact.

Since the second magnet 10 has a portion that receives the magnetism generated by the stator 9 and a portion that receives the magnetism generated by the second magnet 10, they are integrated.
It is not necessary to separately provide a magnet for receiving the magnetism generated by the stator 9 and a magnet for receiving the magnetic force generated by the second magnet 10, and the rotor and the coupling magnet are provided on the rotor shaft 6. , And the impeller are not placed side by side.

The magnet pump 1 having such a structure
Is arranged in the engine room, the fluid inlet 2b is connected to the fluid tank, and the fluid outlet 2c is connected to the fluid gallery provided in the engine.
Is electrically connected to the magnet pump controller and mounted on the vehicle.

When the engine starts to rotate and a current is sequentially supplied from the magnet pump controller to each slot of the stator coil 21, a magnetic force is generated inside the stator 9, and the magnetic force of the stator 9 attracts the second magnet. When the second magnet 10 and the rotor core member 7 rotate together and the second magnet 10 and the rotor core member 7 rotate, the magnetism generated inside the second magnet 10 on the impeller 4 side is generated by the partition wall member 3 Through the first magnet 8
Therefore, the impeller 4 rotates in the pump chamber 12 and the impeller 4 rotates in the pump chamber 12 so that the fluid stored in the fluid tank is introduced into the pump chamber 12 from the fluid introduction port 2b. And is guided to the fluid outlet 2c from the central introduction portion 4b1 of the fluid flow path forming portion 4b of the impeller 4 via the side introduction portion 4b2 and is fed from the fluid outlet 2c to the fluid gallery of the engine. Becomes

As described above, the second magnet 10
Has a portion for receiving the magnetic force generated by the stator 9 and a portion for receiving the magnetic force generated by the first magnet 8 in an integrated manner. Therefore, the magnet for receiving the magnetic force generated by the stator 9 and the first It is not necessary to separately provide a magnet for receiving the generated magnetism of the magnet 8 of FIG. 1, and the rotor core member 7 and the impeller body 4a are arranged close to each other. The ring magnet and the impeller are not arranged side by side.

[0036]

As described above, according to the magnet pump of the first aspect of the present invention, the first magnet attached to the rotor core member, the second magnet attached to the impeller, and the rotor. A magnetic coupling is formed between the core member side and the second magnet that generates a magnetic force to the stator on the pump chamber side and a magnetic force to the first magnet on the pump chamber side, and the rotor core member rotates due to the magnetic force generated by the stator. Then, since the magnetic force generated by the second magnet attracts the first magnet, the rotation of the rotor core member is transmitted to the impeller, so that the rotor, the coupling magnet, and the impeller are arranged on the rotor shaft. Are not placed side by side, which reduces the dimension of the rotor shaft in the longitudinal direction. An excellent effect that downsizing can be achieved.

According to the magnet pump of claim 2 of the present invention, the first magnet mounted on the impeller body rotatably supported in the pump chamber of the pump case,
Magnet coupling by a second magnet that generates a magnetic force that can be attracted to the stator on the rotor core member side that is rotatably supported by the motor case and a magnetic force that can be attracted to the first magnet on the pump chamber side. Is formed, the rotor core member is rotated by the magnetic force generated by the stator, and the first magnet is attracted by the magnetic force generated by the second magnet, so that the rotation of the rotor core member is transmitted to the impeller. Since the rotor, the coupling magnet, and the impeller are not arranged side by side on the rotor shaft, the size of the rotor shaft in the longitudinal direction can be reduced, which is excellent in compactness. Produce an effect.

According to the magnet pump of claim 3 of the present invention, the first magnet mounted on the impeller body rotatably supported in the pump chamber of the pump case,
By a second magnet that is held by the magnetic force of the stator on the rotor core member side that is rotatably supported by the first and second bearings on the motor case and that is held by the magnetic force of the first magnet on the pump chamber side. , The magnetic coupling is formed, the rotor core member is rotated by the magnetic force generated by the stator, and the first magnet is attracted by the magnetic force generated by the second magnet, so that the rotor core member is rotated by the impeller. Since it is transmitted, the rotor, the coupling magnet, and the impeller are not arranged side by side on the rotor shaft,
As a result, the size of the rotor shaft in the lengthwise direction is reduced, which is advantageous in that the size of the rotor shaft can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of an embodiment of a magnet pump according to the present invention.

FIG. 2 shows (A in the magnet pump shown in FIG.
-A) It is a line sectional view.

FIG. 3 is a schematic view of (B in the magnet pump shown in FIG.
-B) It is a line sectional view.

FIG. 4 is a schematic diagram of (C in the magnet pump shown in FIG.
-C) It is a line sectional view.

[Explanation of symbols]

 1 Magnet Pump 2 Pump Case 2b Fluid Inlet 2c Fluid Outlet 3 Partition Member 4 Impeller 4a Impeller Main Body 4b Fluid Flow Path Forming Section 5 Motor Case 6 Rotor Shaft 7 Rotor Core Member 8 1st Magnet 9 Stator 10 2nd Magnet 12 Pump chamber 15 Impeller shaft 24 First rotor bearing 28 Second rotor bearing

Claims (3)

[Claims] 1. A motor case, a stator arranged inside the motor case and generating a magnetic field by energization, a rotor shaft rotatably supported by the motor case, and a rotor core attached to the rotor shaft. A member, a pump case coupled to the motor case, an impeller rotatably arranged in a pump chamber of the pump case, a first magnet attached to the impeller and generating a magnetic field, A second magnet mounted on the rotor core member and disposed in the magnetic field of the stator and in the magnetic field of the first magnet to generate a magnetic force with respect to the stator and a magnetic force with respect to the first magnet. A magnet pump that is equipped with a magnet. 2. A pump case having a fluid inlet and a fluid outlet connected to the pump chamber, and an impeller shaft rotatably arranged in the pump chamber of the pump case, and the impeller shaft rotating on the impeller shaft. An impeller having an impeller body movably supported, a motor case coupled to the pump case, a stator arranged in the motor case and generating a magnetic field by energization, and arranged on one end side of the motor case. A first rotor bearing, a second rotor bearing arranged on the other end side of the motor case, a rotor shaft rotatably supported by the first rotor bearing and the second rotor bearing, A rotor core member coupled to the rotor shaft, a first magnet attached to the impeller body of the impeller and generating a magnetic field, and attached to the rotor core member. A second magnet that is disposed in the magnetic field of the stator and in the magnetic field of the first magnet, and that generates a magnetic force that can be attracted to the stator and a magnetic force that can be attracted to the first magnet. A magnet pump that is equipped with. 3. A pump case having a fluid inlet and a fluid outlet, a partition wall member coupled to the pump case and having a pump chamber between the pump case, and a pump chamber of the pump case. An impeller having a vane wheel shaft rotatably disposed in the impeller shaft, a vane wheel main body rotatably supported by the vane wheel shaft, and an impeller having a fluid flow path forming portion provided in the impeller body; A motor case coupled to the partition member, a stator arranged in the motor case and generating a magnetic field by energization, a first rotor bearing arranged on one end side of the motor case, A second rotor bearing mounted at a position facing the first rotor bearing, and on the extension line of the impeller shaft, rotatable to the first rotor bearing and the second rotor bearing. A held rotor shaft, a rotor core member disposed inside the first stator and coupled to the rotor shaft, a first magnet attached to the impeller body of the impeller and generating a magnetic field, The rotor core member is attached to the rotor core member in an annular shape having a length from the rotor core member side to the outside of the impeller body, and is in non-contact with the stator in the magnetic field of the stator and in non-contact with the first magnet. A second magnet that is disposed in the magnetic field of the magnet and that generates a magnetic force that can be held by the magnetic force of the stator and a magnetic force that can be held by the magnetic force of the first magnet. And a magnet pump.