JPH09163674A - Magnet pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the heat generation of a pump being set on an impeller shaft by the fluid passing within the fluid passage for cooling of the pump bearing, being introduced from a fluid inlet to a fluid outlet, when the impeller shaft rotates. SOLUTION: An impeller shaft 9 is made independent of a rotor shaft 23, and a small-diameter shaft 9a is disposed on the one end side, and a large- diameter shaft 9c is disposed on the other end side through a flange 9b provided at the center. A first pump bearing 10 is set at one end of the small-diameter shaft 9a, and the second pump bearing 11 is set at the other end of the small- diameter shaft 9a, and an impeller 14 is mounted to the first and second pump bearings 10 and 11. Those pump bearings 10 and 11 are cooled by the fluid passing within the fluid passages 14e and 14g for cooling of pump bearings, being introduced through a fluid inlet 8b to a fluid outlet 8, when the impeller 14 rotates. Hereby, the heat generation of the pump bearings 10 and 11 can be suppressed even at high rotational speed or continuous operation of the impeller 14.

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 an impeller shaft rotatably supported by a bearing attached to a case is arranged on an extension line of a rotor shaft, and an impeller fixed to the impeller shaft is housed in a pump chamber. In the magnet coupling, one coupling magnet coupled to the rotor shaft and the other coupling magnet 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, so that the fluid is sucked into the pump chamber and discharged.

[0004]

However, in the magnet pump described above, the impeller shaft to which the impeller is fixed is
Although it is rotatably supported by the bearing attached to the case, the bearing is hermetically attached to the case, so heat is generated when the impeller rotates at high speed or when it is continuously used. It is hard to say that this is not the case, and there is a problem that the life of the bearing may be shortened when heat is generated for a long time, and there has been a problem to solve this problem.

[0005]

SUMMARY OF THE INVENTION A magnet pump according to the present invention comprises:
It is an object of the present invention to provide a magnet pump whose life can be extended by improving the durability of the bearing.

[0006]

Configuration of the Invention

[0007]

In a magnet pump according to claim 1 of the present invention, a motor case, a stator arranged inside the motor case and generating a magnetic force by energization, and a magnetic force generated by the stator are: A rotor rotatably supported by the motor case and rotated by the magnetic force generated by the stator, a rotor-side coupling magnet coupled to the rotor, and a motor case coupled via a partition member, and a fluid inlet and a fluid outlet. A pump case formed with a pump case, an impeller shaft arranged in the pump chamber formed between the pump case and the partition wall member, a pump bearing inserted in the impeller shaft, and rotatably supported by the pump bearing. And an impeller for guiding the fluid introduced from the fluid inlet through the fluid outlet to the rotor side cup. A coupling magnet disposed within the magnetic force of the ring magnet, and a bearing cooling fluid passage formed so that the fluid guided from the fluid inlet to the fluid outlet can contact the pump bearing. It is characterized by having done.

In the magnet pump according to the second aspect of the present invention, the motor case, the stator disposed inside the motor case and generating magnetic force by energization, and the magnetic force generated by the stator are rotatable in the motor case. A rotor that is supported and rotates by the magnetic force generated by the stator;
A rotor-side coupling magnet coupled to the rotor, a pump case coupled to the motor case via a partition wall member and having a fluid inlet and a fluid outlet, and formed between the pump case and the partition wall member. The impeller shaft arranged in the pump chamber, the first and second pump bearings inserted in the impeller shaft, and the first and second pump bearings are arranged at the ends, and the first and second pump bearings are arranged. An impeller that is rotatably supported by a pump bearing and that guides the fluid introduced from the fluid inlet through the fluid outlet through rotation, and is integrally attached to the impeller and placed within the magnetic force of the rotor-side coupling magnet. An impeller side coupling magnet,
A pump formed so as to communicate from the outside of the first pump bearing to the outside of the second pump bearing so that the fluid guided from the fluid inlet to the fluid outlet can come into contact with the first and second pump bearings. It is characterized in that the bearing cooling fluid channel is provided.

In the magnet pump according to the third aspect of the present invention, the motor case, the stator disposed inside the motor case, which generates magnetic force by energization, and the magnetic force generated by the stator are rotatable in the motor case. A rotor that is supported and rotates by the magnetic force generated by the stator, a rotor-side coupling magnet that is coupled to the rotor, and a pump that is coupled to the motor case via a partition member and has a fluid inlet and a fluid outlet. A case,
An impeller shaft arranged in a pump chamber formed between the pump case and the partition member, a first pump bearing inserted into the impeller shaft and attached to one end of the impeller, and an impeller shaft, A second pump bearing attached to the other end of the impeller, a third pump bearing inserted into the impeller shaft and attached to the partition wall member, and a fourth pump bearing inserted into the impeller shaft and attached to the pump case. And the first and second pump bearings are mounted in the center, and an impeller for guiding the fluid introduced from the fluid inlet through the fluid outlet through rotation is integrally attached to the rotor. The impeller-side coupling magnet disposed within the magnetic force of the side-coupling magnet, and the fluid that is disposed outside the first pump bearing on one end side of the impeller and that is guided from the fluid inlet to the fluid outlet is the first. The first pump bearing cooling fluid passage formed so as to be able to contact the pump bearing and the first pump bearing cooling fluid passage are in communication with each other, and the second pump bearing of the second pump bearing is provided on the other end side of the impeller. A second pump bearing cooling fluid flow path that is arranged outside and is formed so that the fluid guided from the fluid inlet to the fluid outlet can contact the second pump bearing;
Is disposed outside the third pump bearing in the partition member,
A third pump bearing cooling fluid passage formed so that the fluid introduced from the fluid inlet to the fluid outlet can come into contact with the third pump bearing, and is arranged outside the fourth pump bearing in the pump case, It is characterized in that the fluid introduced from the fluid inlet to the fluid outlet is provided with a fourth pump bearing cooling fluid passage formed so as to come into contact with the fourth pump bearing.

The magnet pump according to claim 4 of the present invention is characterized in that the pump bearing cooling fluid passage is formed by a notch cut out toward the outside of the pump bearing.

[0011]

In the magnet pump according to the first aspect of the present invention, the pump bearing inserted in the impeller shaft is
When the impeller rotates, it is cooled by the fluid introduced from the fluid inlet to the fluid outlet and passing through the fluid passage for cooling the pump bearing. Therefore, even if the impeller rotates at high speed or is continuously used, heat generation of the pump bearing is suppressed.

In the magnet pump according to the second aspect of the present invention, the pump bearing inserted into the impeller shaft is guided from the fluid inlet port to the fluid outlet port when the impeller rotates, and the pump bearing cooling fluid passage is provided. The fluid passing inside is cooled by contacting the outside at the impeller. Therefore,
Even if the impeller rotates at high speed or is continuously used, heat generation of the pump bearing is suppressed.

In the magnet pump according to claim 3 of the present invention, the first pump bearing attached to the partition wall member and inserted through the impeller shaft is a first pump bearing formed outside the first pump bearing in the partition wall member. When the impeller rotates, the fluid guided from the fluid inlet to the fluid outlet comes into contact with the pump bearing cooling fluid flow path of the second, and is attached to one end of the impeller and inserted into the impeller. Pump bearings
The second pump bearing cooling fluid passage formed outside the second pump bearing on one end side of the impeller causes the fluid introduced from the fluid inlet port to the fluid outlet port to contact when the impeller rotates. The third pump bearing attached to the other end side of the impeller and inserted into the impeller is communicated with the second pump bearing cooling fluid passage on the other end side of the impeller, and is the third pump bearing. The third pump-bearing cooling fluid flow path formed on the outer side of the pump contacts the fluid guided from the fluid inlet to the fluid outlet when the impeller rotates, and is attached to the pump case and inserted into the impeller. The fourth pump bearing is
The fourth pump bearing cooling fluid passage formed outside the fourth bearing in the pump case allows the fluid introduced from the fluid inlet to the fluid outlet to come into contact when the impeller rotates. Therefore, even if the impeller rotates at high speed or is continuously used, heat generation of each pump bearing is suppressed.

In the magnet pump according to claim 4 of the present invention, the pump bearing inserted into the impeller shaft is guided from the fluid inlet port to the fluid outlet port toward the outside of the pump bearing when the impeller rotates. It is cooled by the fluid passing through the cutout portion of the cut fluid path for cooling the bearing. Therefore, even if the impeller rotates at high speed or is continuously used, heat generation of the pump bearing is suppressed.

[0015]

1 to 6 show an embodiment of a magnet pump according to the present invention.

The illustrated magnet pump 1 is mainly composed of a motor case 2, a stator 3, a rotor 4, a partition member 5, a rotor-side coupling magnet 6 and a impeller-side coupling magnet 7, which form a magnet coupling, and a pump case 8. , Impeller shaft 9, first pump bearing (bearing) 10, second pump bearing (bearing) 11, third
Pump bearing (bearing) 12, fourth pump bearing (bearing)
13 and an impeller 14.

In the motor case 2, a stator 3 is attached to the inside of a case body 2a formed in a substantially cylindrical shape, and an end cover 15 is provided on one end side of the case body 2a.
And the pump case 8 is screwed to the other end of the case body 2a via the partition member 5.

In the stator 3, as shown in FIG.
A core 16 having a coil winding portion 16a having a predetermined number of slots is provided, and a stator coil 17 wound around each coil winding portion 16a of the core 16 is provided.
Is provided. The stator coil 17 is electrically connected to the external connection wirings 18 and 18 via a connection circuit (not shown) for each slot, and the external connection wirings 18 and 18 are electrically connected to a controller (not shown). A rotating magnetic force is generated inside the stator 3 by sequentially supplying an electric current to each slot of the stator coil 17.

The end cover 15 is formed in a lid shape that closes one end side of the case body 2a, and is connected to one end side of the case body 2a via a first O-ring 19 (O ring). A first rotor bearing 20 is attached to the center of the end cover 15, and a disc-shaped circuit board 21 is attached near the first rotor bearing 20. The circuit board 21 has a cylindrical magnet 2 for rotation detection.
2 is coupled to a rotor shaft 23 described later,
Three Hall elements 24 are arranged outside the cylindrical magnet 22 without contacting the cylindrical magnet 22. Since the three Hall elements 24 are electrically connected to the above-described controllers, respectively, when the cylindrical magnet 22 rotates with the rotor shaft 23, a signal for detecting the rotation direction and the rotation speed of the rotor shaft 23. Is given to the controller, and feedback control is performed by the controller.

Inside the stator 3, a rotor 4 is arranged. The rotor 4 is provided with a stepped rotor shaft 23. One end of the rotor shaft 23 is rotatably supported by a first rotor bearing 20 attached to an end cover 15, and the other end is rotatably supported. The side is rotatably supported by a second rotor bearing 25 attached to the center of the partition member 5 described later.

A rotor base 26 formed in a substantially cylindrical shape is attached to the outside of the rotor shaft 23 on the rotor 4. On the rotor base 26, a rotor core portion 26 a that is arranged to face the inner peripheral side of the stator 3 and a rotor core portion 26 a
To the other end of the case main body 2a of the motor case 2 and a magnet mounting portion 26b formed in a ring shape so as to project toward the other end side, and the rotor magnet 27 is mounted to the outer edge of the rotor core portion 26a. The rotor magnet 27 is a ring-shaped magnet, and as shown in FIG. 2, the N pole and the S pole are arranged on the outside of the cylindrical rotor magnet iron core 27a in the circumferential direction to correspond to the number of slots of the stator 3. The rotor magnet bodies 27b that are sequentially magnetized in the same number are integrally coupled.

The magnet mounting portion 26b provided on the rotor base 26 is disposed on the outside of the partition wall member 5 which will be described later.
It projects toward the other end side in a cylindrical shape. The magnet mounting portion 26b is formed to be thinner than the rotor core portion 26a, and the rotor-side coupling magnet 6 forming a part of the magnet coupling is attached to the inner edge of the magnet mounting portion 26b.

The rotor-side coupling magnet 6 is a ring-shaped magnet, and as shown in FIG. 4, N is formed inside the cylindrical coupling magnet iron core 6a.
A coupling magnet body 6b in which the pole and the S pole are sequentially magnetized in the circumferential direction is integrally coupled. The rotor-side coupling magnet 6 attached to the magnet attaching portion 26b is arranged close to the rotor magnet 27 attached to the rotor core portion 26a.

In the rotor side coupling magnet 6, the magnet mounting portion 26b is integrally formed with the rotor core portion 26a, and the inner side surface of the magnet coupling body 6b is in non-contact with the outer wall of the partition plate 5b of the partition wall member 5. Since the rotor magnet 27 is arranged, the rotor magnet 27 is attracted or repelled by the rotating magnetic force generated by the stator 3, and
As 6a rotates, it rotates outside the partition member 5.

The partition wall member 5 is connected to the other end of the case body 2a of the motor case 2 via a second O-ring (O ring) 28 for keeping watertightness.
From the other end of the case body 2a to the center of the case body 2
A partition plate 5b formed in a concave shape is provided toward one end side of a. Then, on the side of the rotor shaft 23 of the partition plate 5b, the second
Of the rotor shaft 23 of the partition plate 5b.
A third pump bearing mounting portion 5c is formed on the side opposite to
The third pump bearing 12 is attached to the third pump bearing attachment portion 5c.

As shown in FIG. 3, on the third pump bearing mounting portion 5c, a notch cut out in a groove shape from the center toward the outer periphery on the side opposite to the rotor shaft 23 of the partition plate 5b. The third pump bearing cooling fluid passage 5d formed by the portion 5c1 is provided, and the third pump bearing cooling fluid passage 5d has a cutout portion 5c1 opposite to the rotor shaft 23 of the partition plate 5b. Since it is formed so as to be connected to the outer edge of the third pump bearing 12 from the side of the pump chamber 29 formed in the third pump bearing 12,
It has the function of making direct contact with.

Since the partition wall member 5 closes the opening at the other end of the case body 2a of the motor case 2, the partition plate 5b blocks the inside of the motor case 2 from the pump chamber 29 described later. There is.

The pump case 8 is connected to the partition member main body 5a of the partition member 5 via a third O-ring (O ring) 30 for maintaining watertightness. Pump case 8
Since the outer peripheral portion of the pump case body 8a formed in a substantially U-shape is coupled to the partition member 5, the motor is provided in the U-shaped inner part of the pump case body 8a and the partition plate 5b of the partition member 5. A pump chamber 29 is formed on the side opposite to the inside of the case body 2 a of the case 2.

The pump case body 8a of the pump case 8 has a fluid introduction port 8 connected to the center of the pump chamber 29 for communication therewith.
b is formed, and a fluid outlet 8c, which is connected to the side of the pump chamber 29 and is independent of the fluid inlet 8b, is formed.

Then, as shown in FIG. 6, the pump case 8 is provided with a fourth case substantially at the center of the pump case body 8a.
The pump bearing mounting portion 8d is formed, and the fourth pump bearing mounting portion 8d is mounted with the fourth pump bearing 13. As shown in FIG. 6, in the fourth pump bearing attachment portion 8d, a fourth pump bearing cooling fluid passage formed by notches 8d1 cut out in a groove shape from the center toward the outer periphery in four directions. 8e is provided, and the cutout portion 8d1 of the fourth pump bearing cooling fluid channel 8e is provided in the pump chamber 2
Since it is formed so as to be connected to the outer edge of the fourth pump bearing 13 from the 9 side, it has a function of bringing the fluid passing through the pump chamber 29 into direct contact with the fourth pump bearing 13.

Further, the fourth pump bearing 13 attached to the pump case body 8a of the pump case 8 and the partition member 5
Pump bearing 12 mounted on the partition plate 5b provided in the
An impeller shaft 9 is rotatably supported by and.

The impeller shaft 9 is formed independently of the rotor shaft 23 described above, and is arranged on the other end side through a small diameter shaft portion 9a arranged on one end side and a flange 9b formed at the center. The small diameter shaft portion 9a has a first pump bearing 10 inserted into one end portion thereof, and the other end portion of the small diameter shaft portion 9a has a second pump bearing 11 formed therein. The impeller 14 is attached to the first and second pump bearings 10 and 11 that are inserted.

In the impeller 14, an impeller body 14a formed in a substantially cylindrical shape near one end and a fluid flow path projecting in a disk shape radially outward of the impeller body 14a near the other end. The forming portion 14b is integrally provided.

A first pump bearing mounting portion 14c is provided on one end side of the center of the impeller body 14a. As shown in FIG. 4, in the first pump bearing mounting portion 14c,
Notch 1 cut in a groove shape from the center to the four sides of the outer circumference
The first pump bearing cooling fluid passage 14e formed by 4c1 is provided.

A second pump bearing mounting portion 14f is provided on the other end side of the center of the impeller body 14a.
The second pump bearing mounting portion 14f is provided with a second pump bearing cooling fluid passage 14g formed by a notch portion 14f1 that is cut in a groove shape from the center toward the outer periphery in four directions. The notch portion 14f1 of the second pump bearing cooling fluid passage 14g communicates with a central passage 14b1 described later.

The cutout portion 14c1 of the first pump bearing cooling fluid passage 14e and the cutout portion 14f1 of the second pump bearing cooling fluid passage 14g correspond to the length of the small diameter shaft portion 9a of the impeller shaft 9. The central flow passage 14b1 is connected to the third pump bearing mounting portion 5c of the partition wall member 5 because the fluid is connected along the depth direction, and the fluid passing through the pump chamber 29 is introduced from the central flow passage 14b1 side. And has a function of directly contacting the second pump bearing 11 and the first pump bearing 10.

The impeller 14 has a size such that the outer diameter of the impeller body 14a is arranged on the inner wall of the partition plate 5b of the partition member 5, and the outer edge thereof constitutes another part of the magnet coupling. A vehicle side coupling magnet 7 is attached. The impeller-side coupling magnet 7 is a ring-shaped magnet, and as shown in FIG. 4, an N pole and an S pole are sequentially attached to the outside of the cylindrical coupling magnet iron core 7a in the circumferential direction. The magnetized coupling magnet body 7b is integrally connected.

The impeller 14 has an impeller body 14a.
Since the outer surface of the impeller-side coupling magnet 7 attached to the partition wall 5 is disposed at a predetermined distance from the inner wall of the partition plate 5b of the partition member 5, the impeller-side coupling magnet 28 is attached to the partition member 5. It is arranged in the pump chamber 29 in a non-contact manner at a position close to the inner wall of the partition plate 5b.

Further, as shown in FIG. 5, the fluid passage forming portion 14b of the impeller 14 has a central passage 14b1 formed in a concave shape at the center, and communicates from the central passage 14b1 to the outer edge. A plurality of connected side channels 14b2 are formed. The side flow passage 14b2 is the impeller cover 1
4b3 communicates only with the outside of the central flow passage 14b1 and the fluid flow passage forming portion 14b.

The impeller 14 is arranged in the pump chamber 29 in a non-contact manner at a position where the outer surface of the impeller-side coupling magnet 6 attached to the impeller body 14a is close to the inner wall of the partition plate 5b of the partition member 5. And the coupling magnet body 6 included in the rotor-side coupling magnet 6
Since the inner surface of b is arranged in non-contact with the outer wall of the partition plate 5b of the partition member 5, the rotor 4 is rotated by the rotating magnetic force generated by the stator 3 and at the same time, the partition member 5
Through the partition plate 5b of the rotor side coupling magnet 6
The magnetic force acting on the impeller-side coupling magnet 7 causes the rotor 4 and the rotor 4 to rotate integrally in the pump chamber 29.

By rotating the impeller 14 in the pump chamber 29, the central flow passage 14b1 of the fluid flow passage forming portion 14b is formed.
Since a negative pressure is generated in the pump, the fluid stored in the fluid tank connected to the fluid introduction port 8b outside the magnet pump 1 is sucked into the pump chamber 29, and the central passage of the fluid passage forming portion 14b is attracted. The fluid is guided from 14b1 to the fluid outlet 8c through the lateral flow passage 14b2, and the fluid is pressure-fed to an engine such as an engine connected to the fluid outlet 8c outside the magnet pump 1.

At this time, a part of the fluid introduced into the pump chamber 29 has a cutout portion 8d1 of the fourth pump bearing cooling fluid passage 8e in the fourth pump bearing mounting portion 8d formed in the pump case 8. Since it also passes through the inside, the fourth pump bearing 1
Contact 3 directly.

The other part of the fluid introduced into the pump chamber 29 is the fluid flow path forming portion 14 formed in the impeller 14.
b from the central flow passage 14b1 to the second pump bearing mounting portion 14
At f, the first pump bearing mounting portion 14c passes through the inside of the cutout portion 14f1 of the second pump bearing cooling fluid passage 14g.
At the cutout portion 14c1 of the first pump bearing cooling fluid passage 14e to the third pump bearing attachment portion 5 of the partition wall member 5,
flow toward the c side, and at the third pump bearing mounting portion 5c,
Of the second pump bearing 11, the first pump bearing 10, and the third pump bearing 1 because they are guided to the fluid outlet 8c after passing through the notch 5c1 of the pump bearing cooling fluid flow path 5d.
Contact 2 directly.

Magnet pump 1 having such a structure
Is disposed in the engine room, the fluid inlet port 8b is connected to the fluid tank, the fluid outlet port 8c is connected to the fluid gallery provided in the engine, and the external connection wires 18 and 18 are electrically connected to the controller. It is connected and installed in the vehicle.

When the engine starts to rotate and a current is sequentially supplied from the controller to each slot of the stator coil 17, a rotating magnetic force is generated inside the stator 3, so that the rotating magnetic force of the stator 3 rotates the rotor 4. When the rotor 4 rotates, the magnetic force generated by the rotor-side coupling mut 6 attached to the magnet attachment portion 26b of the rotor 4 passes through the partition plate 5b of the partition wall member 5 and the impeller-side coupling magnet 7 The impeller 14 rotates in the pump chamber 29, and the impeller 14
Is rotated in the pump chamber 29, so that the fluid stored in the fluid tank is transferred from the fluid inlet port 8b to the pump chamber 2
The fluid flow path forming portion 1 introduced in 9 and included in the impeller 14.
4b from the central flow passage 14b1 to the side flow passage 14b2 to be guided to the fluid outlet 7c, and is fed from the fluid outlet 7c to the fluid gallery of the engine.

As described above, part of the fluid introduced into the pump chamber 29 from the fluid introduction port 8b by the rotation of the rotor 4 and the rotation of the impeller 14 is the fourth fluid formed in the pump case 8. In the pump bearing mounting portion 8d, since it also passes through the inside of the cutout portion 8d1 of the fourth pump bearing cooling fluid passage 8e, the fourth pump bearing 13 is cooled by directly contacting the fluid and introduced into the pump chamber 29. The other part of the fluid is the fluid flow path forming portion 14 formed in the impeller 14.
b from the central flow passage 14b1 to the second pump bearing mounting portion 14
At f, the first pump bearing mounting portion 14c passes through the inside of the cutout portion 14f1 of the second pump bearing cooling fluid passage 14g.
At the cutout portion 14c1 of the first pump bearing cooling fluid passage 14e to the third pump bearing attachment portion 5 of the partition wall member 5,
flow toward the c side, and at the third pump bearing mounting portion 5c,
Of the second pump bearing 11, the first pump bearing 10, and the third pump bearing 1 because they are guided to the fluid outlet 8c after passing through the notch 5c1 of the pump bearing cooling fluid flow path 5d.
The direct contact of 2 with the fluid results in the cooling.

[0047]

As described above, according to the magnet pump of the first aspect of the present invention, the pump bearing inserted in the impeller shaft has the fluid inlet port and the fluid outlet port when the impeller rotates. Is cooled by the fluid passing through the pump bearing cooling fluid flow path, and even if the impeller rotates at high speed or is used continuously, heat generation in the pump bearing is suppressed, and By improving the durability of the bearing, it has an excellent effect of extending the life.

According to the magnet pump of the second aspect of the present invention, the pump bearing inserted into the impeller shaft is guided from the fluid inlet port to the fluid outlet port when the impeller rotates, and the pump bearing cooling fluid is introduced. Since the fluid passing through the flow path is cooled by coming into contact with the outside of the impeller, even if the impeller rotates at high speed or is continuously used, heat generation of the pump bearing is suppressed, and as a result, By improving the durability of the bearing, it has an excellent effect of extending the life.

According to the magnet pump of the third aspect of the present invention, the first pump bearing attached to the partition wall member and inserted through the impeller shaft is formed outside the first pump bearing in the partition wall member. When the impeller rotates, the fluid guided from the fluid inlet to the fluid outlet comes into contact with the first pump bearing cooling fluid passage, and is attached to one end of the impeller and inserted into the impeller. 2 pump bearings
The second pump bearing cooling fluid passage formed outside the second pump bearing on one end side of the impeller causes the fluid introduced from the fluid inlet port to the fluid outlet port to contact when the impeller rotates. The third pump bearing attached to the other end side of the impeller and inserted into the impeller is communicated with the second pump bearing cooling fluid passage on the other end side of the impeller, and is the third pump bearing. The third pump-bearing cooling fluid flow path formed on the outer side of the pump contacts the fluid guided from the fluid inlet to the fluid outlet when the impeller rotates, and is attached to the pump case and inserted into the impeller. The fourth pump bearing is
The fourth pump bearing cooling fluid passage formed outside the fourth bearing in the pump case makes contact with the fluid guided from the fluid inlet to the fluid outlet when the impeller rotates. Even if the pump rotates at a high speed or is continuously used, the heat generation of each pump bearing is suppressed, whereby the durability of the bearing is improved, and the excellent effect of extending the life can be achieved.

According to the magnet pump of the fourth aspect of the present invention, the pump bearing inserted into the impeller shaft is guided from the fluid inlet port to the fluid outlet port when the impeller is rotated, to the outside of the pump bearing. Since it is cooled by the fluid passing through the cutout portion of the bearing cooling fluid flow path that has been cut away, even if the impeller rotates at high speed or is used continuously, heat generation of the pump bearing is suppressed, Thereby,
By improving the durability of the bearing, there is an excellent effect that the life can be extended.

[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.

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

FIG. 6 is a schematic diagram of (E in the magnet pump shown in FIG.
-E) It is a line sectional view.

[Explanation of symbols]

 1 Magnet Pump 2 Motor Case 3 Stator 4 Rotor 5 Partition Member 5c1 Notch 5d Third Pump Bearing Cooling Fluid Flow Path 6 Rotor Side Coupling Magnet 7 Impeller Side Coupling Magnet 8 Pump Case 8b Fluid Inlet 8c Fluid Guide Outlet 8d1 Notch 8e Fourth pump bearing Cooling fluid flow path 9 Impeller shaft 10 First pump bearing 11 Second pump bearing 12 Third pump bearing 13 Fourth pump bearing 14 Impeller 14c1 Notch 14e Fourth No. 1 pump bearing cooling fluid channel 14f1 notch 14g Second pump bearing cooling fluid channel 29 pump chamber

Claims (4)

[Claims] 1. A motor case, a stator disposed inside the motor case, which generates a magnetic force by energization, and a magnetic force generated by the stator, which is rotatably supported by the motor case and generates a stator. A rotor that rotates by magnetic force, a rotor-side coupling magnet that is coupled to the rotor, a pump case that is coupled to the motor case through a partition member, and has a fluid inlet and a fluid outlet, and the pump case. And an impeller shaft disposed in the pump chamber formed between the partition wall member, a pump bearing inserted in the impeller shaft, and rotatably supported by the pump bearing, and introduced from the fluid introduction port by rotation. An impeller for discharging fluid from a fluid outlet, and an integrally mounted rotor for the rotor side coupling magnet. And an impeller-side coupling magnet disposed within the magnetic force of the pump bearing, and a pump bearing cooling fluid passage formed so that the fluid guided from the fluid inlet to the fluid outlet can contact the pump bearing. Magnet pump characterized by. 2. A motor case, a stator disposed inside the motor case, which generates a magnetic force when energized, and a magnetic force generated by the stator, which is rotatably supported by the motor case and generates a stator. A rotor that rotates by magnetic force, a rotor-side coupling magnet that is coupled to the rotor, a pump case that is coupled to the motor case through a partition member, and has a fluid inlet and a fluid outlet, and the pump case. And an impeller shaft arranged in the pump chamber formed between the partition wall member, the first and second pump bearings inserted into the impeller shaft, and the first and second pump bearings at the ends. It is arranged and rotatably supported by the first and second pump bearings, and guides the fluid introduced from the fluid inlet through the fluid outlet through the rotation. An impeller, an impeller-side coupling magnet that is integrally attached to the impeller, and is disposed within the magnetic force of the rotor-side coupling magnet, and the second pump from the outside of the first pump bearing. The pump bearing cooling fluid passage is formed so as to communicate with the outside of the bearing so that the fluid introduced from the fluid inlet to the fluid outlet can come into contact with the first and second pump bearings. This is a magnet pump. 3. A motor case, a stator disposed inside the motor case, which generates a magnetic force when energized, and a magnetic force generated by the stator, which is rotatably supported by the motor case and generates a stator. A rotor that is rotated by a magnetic force of the rotor, a rotor-side coupling magnet that is coupled to the rotor, a pump case that is coupled to the motor case via a partition member, and has a fluid inlet and a fluid outlet. An impeller shaft disposed inside a pump chamber formed between the case and the partition member, a first pump bearing inserted into the impeller shaft and attached to one end side of the impeller, and inserted into the impeller shaft. A second pump bearing attached to the other end of the impeller, and a third pump bearing inserted into the impeller shaft and attached to the partition member The fourth pump bearing inserted into the impeller shaft and attached to the pump case and the first and second pump bearings are attached to the center, and the fluid introduced from the fluid introduction port by rotation is fluidized. An impeller leading out from an outlet, an impeller-side coupling magnet that is integrally attached to the impeller and is arranged within the magnetic force of the rotor-side coupling magnet, and the first impeller on one end side of the impeller. A first pump bearing cooling fluid passage formed outside the pump bearing, the fluid being guided from the fluid inlet to the fluid outlet so as to come into contact with the first pump bearing; Fluid which is communicated with the fluid passage for cooling the pump bearing, is arranged outside the second pump bearing on the other end side of the impeller, and is guided from the fluid inlet to the fluid outlet. A second pump bearing cooling fluid passage formed so as to be capable of contacting the second pump bearing, and arranged in the partition member outside the third pump bearing, and from the fluid inlet port to the fluid outlet port. A third pump bearing cooling fluid passage formed so that a fluid to be introduced can come into contact with the third pump bearing, and is arranged outside the fourth pump bearing in the pump case and from the fluid introduction port. A fourth fluid supply port formed so that the fluid introduced to the fluid delivery port can contact the fourth pump bearing.
A magnet pump having a fluid flow path for cooling the pump bearing. 4. The magnet pump according to claim 1, wherein the pump bearing cooling fluid passage is formed by a notch cut out toward the outside of the pump bearing.