JP2018162681A - Magnet gear pump and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic gear pump which is easily attached with a large number of magnets, and has large transmission torque by comprising a large number of magnets.SOLUTION: This magnet gear pump 1 comprises a device main body 2 for incorporating a magnet coupling part 5 constituting a magnet coupling mechanism therein, and a rotating body 6 constituting the magnet coupling part 5 is constituted of a cylinder body whose both end parts are opened, and at an internal peripheral part of which outer magnets 7 are arranged. An opening part of the rotating body 6 at an external drive source side is blocked by a block member 10 for fixing a drive shaft 4a connected to an external drive source. Therefore, when arranging the outer magnets 7 at the internal peripheral part of the rotating body 6, a plurality of outer magnets can be arranged while being aligned in an axial direction of the rotating body 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a magnet gear pump and a manufacturing method thereof.
More specifically, the present invention relates to a magnet gear pump in which a large number of magnets can be easily mounted and a large transmission torque, and a method for manufacturing the magnet gear pump.

In recent years, market needs for pumps having a magnetic coupling mechanism that drives a driving body such as a gear by a magnetic action have been increasing.
In the pump industry having such a magnet coupling mechanism, gear pumps are used for various fluids due to the high performance of magnets used for magnet coupling.
In particular, in high-viscosity fluid quantitative transfer, metering transfer and hydraulic power transmission devices, they are used as high pressure generators in various rotational speed ranges.

For example, in JP2013-066258A (Patent Document 1),
An impeller rotatable around a rotation axis;
A driven magnet formed of a permanent magnet and fixed to the impeller;
A drive magnet that is formed of a permanent magnet and is arranged outside the driven magnet with reference to the rotational axis;
A magnet holding ring that is formed of a ferromagnetic material and has a cylindrical portion that has a cylindrical shape around the rotation axis, and the driving magnet is fixed inside the cylindrical portion;
A motor for rotating the magnet holding ring around the rotation axis;
A magnetic coupling pump unit comprising a magnetic shield body formed of a paramagnetic material, having a cylindrical shape centered on the rotation axis, and having a cylindrical portion in which the magnet holding ring is arranged with an interval inside. Proposed.

This magnetic coupling pump unit can suppress the influence of external magnetic flux leakage and an external magnetic field, and a neodymium magnet is selected as the drive magnet.

JP 2013-066258 A (Claims, paragraph 0044, paragraph 0075, FIG. 3)

In the magnetic coupling pump unit described in Patent Document 1, a neodymium magnet is used as a drive magnet.
Since the neodymium material used as the raw material has good magnetization, the magnetization is easy, and the production of the neodymium magnet is relatively easy.
However, this neodymium magnet is inferior in terms of its ability to retain magnetized energy (also called coercivity) and high temperature characteristics.
Therefore, the neodymium magnet is unsuitable for application to a gear pump that transfers a relatively high temperature fluid in which the temperature of the fluid to be transferred exceeds a high temperature (temperature: 250 ° C. to 300 ° C.).

Further, in Patent Document 1,
A samarium / cobalt magnet can be used as the magnet (driving magnet) placed on the inner circumference of the cup cylinder. This samarium / cobalt magnet has higher temperature characteristics and coercive force than a neodymium magnet. It is excellent.
However, the samarium-cobalt material used as the raw material for samarium-cobalt magnets is inferior to neodymium in its magnetism, so it is necessary to apply a higher voltage for magnetization, and multiple samarium-cobalt materials It was difficult to magnetize the two at the same time.
Therefore, when manufacturing the samarium / cobalt magnet arranged on the inner peripheral side of the cup cylindrical portion, magnetization (magnetization) is applied to each samarium / cobalt material forming the samarium / cobalt magnet. There was a need to go.

  Furthermore, in a gear pump, a large magnet coupling having a large transmission torque is inevitably required for the transfer of a high-viscosity and high-pressure fluid, but in that case, on the inner peripheral side of the cup cylindrical portion, A large number of magnets need to be arranged.

4 shows a conventional gear pump 101, and FIG. 5 shows a rotating body 106 constituting a magnetic coupling mechanism of the gear pump 101. A magnet ( When the samarium / cobalt magnet was mounted as the outer magnet) 107, the magnets 107 were mounted one by one from the opening on the rear end side of the rotating body 106.
However, since the magnetic force of each magnet is very strong, it is difficult to arrange a plurality of magnets side by side in the axial direction.

In view of the present situation, the present invention is intended to provide a magnet gear pump having a large transmission torque by easily mounting a large number of magnets, in particular, a samarium / cobalt magnet, and having a large number of magnets.

According to the first aspect of the present invention,
A magnet gear pump having a magnet coupling mechanism for driving a pump drive body by magnetic coupling between an outer magnet and an inner magnet,
The magnet gear pump is
A cylindrical device body having both ends opened,
The apparatus main body is
Built-in magnet coupling part constituting the magnet coupling mechanism,
The magnet coupling part is
Both ends are open and the outer magnet is provided on the inner periphery, and there is a required gap between the cylindrical rotor that is rotated by an external drive source and the inner periphery of the rotor. It is composed of a rotor that is rotatably arranged and is provided with the inner magnet on the outer periphery so as to face the outer magnet.
The rotating body is
The magnet gear pump is characterized in that the opening on the side of the external drive source is configured to be closed by a closing member that fixes a drive shaft connected to the external drive source.

The invention according to claim 2 of the present invention is
The magnet gear pump according to claim 1, wherein
The closing member is
An inner ring that is externally fitted to the drive shaft, an outer ring that is disposed so as to close the opening of the rotating body, and that is externally fitted in a tapered fitting state with the inner ring, and the inner ring and the outer ring are tightened in the axial direction It is a fastener comprising a fastening bolt.

The invention according to claim 3 of the present invention is
In the magnet gear pump according to claim 1 or 2,
The outer magnet is
A plurality of axially arranged inner circumferential portions of the rotating body are provided,
The inner magnet
A plurality of axially arranged outer peripheral portions of the rotor are provided so as to face the outer magnet.

The invention according to claim 4 of the present invention is
In the magnet gear pump according to any one of claims 1 to 3,
The outer magnet and inner magnet are
All are characterized by comprising samarium / cobalt magnets.

The invention according to claim 5 of the present invention is
In the magnet gear pump according to any one of claims 1 to 4,
The apparatus main body is
In the rear end opening,
A gear mechanism is provided as a pump drive that discharges the liquid inside.
At the tip opening located on the external drive source side,
A bearing portion for bearing the drive shaft of the external drive source is provided.

The invention according to claim 6 of the present invention is
In the magnet gear pump according to any one of claims 1 to 5,
The apparatus main body is
Inside, a bottomed cylindrical pressure vessel having a flange at the opening is provided so as to cover the outer periphery of the rotor.

The invention according to claim 7 of the present invention is
The magnet coupling part that constitutes the magnet coupling mechanism
Cylindrical rotating body that is rotated by an external drive source, both ends are open and the outer magnet is provided on the inner periphery,
The rotor is disposed rotatably with a required interval between the inner periphery of the rotating body, and the outer periphery is configured with a rotor provided with the inner magnet so as to face the outer magnet.
It is a method for manufacturing a magnet gear pump, wherein the outer magnet is inserted from both ends of the rotating body, and a plurality of outer magnets are arranged in the axial direction on the inner periphery of the rotating body.

A magnet gear pump according to the present invention has a magnet coupling mechanism for driving a pump drive body by magnetic coupling between an outer magnet and an inner magnet, and the magnet gear pump is a cylindrical device body having both ends opened. The apparatus main body has a built-in magnet coupling part constituting the magnet coupling mechanism, the magnet coupling part is open at both ends, and the outer magnet is provided on the inner peripheral part. The cylindrical rotating body that is rotated by an external drive source and the inner peripheral portion of the rotating body are rotatably disposed with a required interval, and the outer peripheral portion is opposed to the outer magnet. The rotor is provided with an inner magnet, and the rotating body has an opening on the external drive source side. But those which are configured to be closed by a closure member for fixing the drive shaft connected to an external drive source.
Therefore, when the outer magnet is provided on the inner periphery of the rotating body, the outer magnet is inserted and arranged not only from the opening on the rear end side of the rotating body but also from the opening on the external drive source side. Therefore, a plurality of outer magnets can be arranged side by side in the axial direction of the rotating body without the magnets sticking to each other during insertion / arrangement.

  With such a configuration, the magnet gear pump according to the present invention is provided with a large number of outer magnets and a large number of inner magnets opposed to the outer magnets. It can be used for fluid transfer.

  In the magnet gear pump, a gear mechanism as a pump driving body that discharges internal liquid to the outside is provided at the rear end opening of the apparatus main body, and an external opening is provided at the tip opening located on the external drive source side. A bearing portion for bearing the drive shaft of the drive source can be provided.

In the magnet gear pump, as the closing member, an inner ring that fits externally on the drive shaft, an outer ring that is disposed so as to close the opening of the rotating body, and that fits in a taper fitting state with the inner ring, A fastener comprising a fastening bolt for fastening the inner ring and the outer ring in the axial direction can be used.
With such a configuration, the rotating body can be strongly fixed to the drive shaft.

Furthermore, in the magnet gear pump, samarium / cobalt magnets can be adopted as the outer magnet and the inner magnet.
With such a configuration, the present invention can be applied to a case of transferring a relatively high temperature fluid that exceeds 250 ° C. to 300 ° C.

In the magnet gear pump according to the present invention, the rotating body constituting the magnet coupling portion of the apparatus main body is formed of a cylindrical body having both ends opened, so that an outer magnet is inserted and arranged on the inner peripheral portion of the rotating body. When installing, an outer magnet can be inserted and arranged from both ends of the cylindrical body.
Therefore, when manufacturing the magnet gear pump of the present invention, the outer magnets are arranged side by side in the axial direction without the magnets sticking to each other when the outer magnets are inserted and arranged, and the insertion and arrangement are not hindered. Its production is very easy.

It is explanatory drawing which shows an example of the magnet gear pump concerning this invention. It is explanatory drawing which shows an example of the rotary body which comprises the magnet gear pump shown in FIG. It is explanatory drawing which shows the other example of the rotary body which comprises the magnet gear pump concerning this invention. It is explanatory drawing which shows an example of the conventional magnet gear pump. It is explanatory drawing which shows an example of the rotary body which comprises the magnet gear pump shown in FIG.

Hereinafter, an example of implementation of the magnet gear pump according to the present invention will be specifically described with reference to the accompanying drawings.
Note that the present invention is not limited to the disclosed embodiments, and various modifications can be made without departing from the scope of the invention.

  As shown in FIG. 1, a magnet gear pump 1 according to the present invention closes a cylindrical device main body 2 having both ends opened therein and a rear end opening 2b of the device main body 2. A gear mechanism 3 as a pump drive body connected in this manner, and a bearing portion 4 connected so as to close the front end opening 2a of the apparatus main body 2 located on the external drive source side such as a motor. Has been.

  The front end opening 2a is closed by a bearing unit 4 for holding (supporting) a drive shaft 4a interlocked with an external drive source (not shown) such as a motor, and the rear end opening 2b is a gear mechanism. 3 is closed.

  The drive shaft 4a is arranged such that the rear end side thereof is held by a pair of bearings 4b and 4c arranged at a predetermined interval in the bearing portion 4 and protrudes into the apparatus main body 2. It is configured to be fixed to the rotating body 6 (specifically, the closing member 10) of the magnet coupling portion 5 via the connector 4d.

  The magnet coupling portion 5 constitutes a magnet coupling mechanism for driving the gear mechanism 3 and, as shown in FIG. 1, a cylindrical rotating body 6 that is rotated by an external drive source, and this rotation. It is composed of a rotor 8 that is rotatably arranged with a predetermined interval between it and the inner periphery of the body 6.

As shown in FIGS. 1-3, the said rotary body 6 is comprised with the cylindrical body which both ends open, and the one end part (end part by the side of an external drive source) is provided so that opening may be closed, and the said A closing member 10 connected to the drive shaft 4a via a connector 4d is provided, and the other end is opened.
A plurality of concave portions having a required depth are formed in the inner circumferential portion of the rotating body 6 in the axial direction, and a fan-shaped outer magnet 7 having a cross section constituting the magnet coupling mechanism is fixed in the concave portions. It is fixed via the member 6a.
In this embodiment, a plurality of the recesses are formed in the circumferential direction, and the outer magnet 7 is fixed in these recesses via the fixing member 6a.

In the present invention, since the rotating body 6 is constituted by the cylindrical body having both ends opened as described above, the outer magnet 7 is inserted from each of the both ends of the rotating body 6, and the inner peripheral portion thereof. It is possible to arrange in a plurality of recesses formed on the substrate.
Therefore, the outer magnets 7, 7... Do not stick to each other in spite of their strong magnetic force during insertion / arrangement. Therefore, as shown in FIG. They can be arranged side by side in the axial direction.

  With this configuration, the driving body of the gear pump 1 is driven by a magnet coupling mechanism that is magnetically coupled with a large number of outer magnets and an inner magnet that is provided so as to face the outer magnets. As a result, it can be used for transferring a high viscosity / high pressure fluid.

  When the outer magnet 7 is mounted, a predetermined width in the axial direction is provided between the outer magnets 7 and 7 so that the outer magnets 7 and 7 are arranged at predetermined intervals in the axial direction. You may arrange | position the ring member (not shown) which has.

The rotary body 6 is provided with a closing member 10 at the opening on the side of the external drive source, which fixes the drive shaft 4a connected to the external drive source so as to close the rotary body 6.
In this embodiment, the closing member 10 is a so-called friction fastener, and as shown in FIGS. 2 and 3, an inner ring 10a that is externally fitted to the drive shaft 4a via the connector 4d, and the rotating body 6, and an outer ring 10 b that is externally fitted in a taper fitting state with the inner ring 10 a, and tightening bolts 10 c that tighten the inner ring 10 a and the outer ring 10 b in the axial direction.・ It consists of.
As apparent from FIG. 2, the fastener 10 includes an inner ring 10a that is externally fitted to the drive shaft 4a (specifically, a connector 4d that is coupled to the drive shaft 4a), and an outer ring 10b that is externally fitted to the inner ring 10a. In a state where they are taper-fitted to each other, they are arranged between the drive shaft 4a (specifically, the connector 4d) and the opening of the rotating body 6.
At that time, since the inner ring 10a and the outer ring 10b are tightened in the axial direction by a plurality of tightening bolts 10c, the rotating body 6 is brought into contact with the inner ring 10a and the outer ring 10b, which are taper-fitted. The drive shaft 4a (specifically, the connector 4d) can be strongly fixed.

In the present invention, the closing member 10 may be any member that can fix the rotating body 6 to the drive shaft 4a (specifically, the connector 4d).
Accordingly, the present invention is not limited to the above-described fasteners, and can be used without any particular limitation as long as the rotating body 6 can be fixed to the drive shaft 4a (specifically, the connector 4d).

With such a configuration, as described above, the rotating body 6 is configured by a cylindrical body having both ends opened, so that in the state where the closing member 10 is removed, the inner peripheral portion thereof is connected to the inner peripheral portion from the both ends. The outer magnet 7 can be inserted and arranged.
Therefore, a plurality of the outer magnets 7 can be easily arranged side by side not only in the circumferential direction but also in the axial direction.

  As shown in FIG. 1, a rotor 8 is rotatably disposed inside the rotating body 6 with a predetermined interval.

The rotor 8 is composed of a cylindrical rotor main body, and has an insertion hole through which a drive shaft 12a for transmitting the rotation to the gear mechanism 3 is inserted at the center thereof. A recess having a depth is formed.
In this embodiment, the drive shaft 12a is fixed to the insertion hole by a key and a key groove.

  The concave portion provided on the outer peripheral portion of the rotor 8 is formed at a required depth at a position facing the outer magnet 7 fixed to the rotating body 6, and the magnet cup is provided in the concave portion. The other inner magnet 9 constituting the ring mechanism is fixed via a fixing member 8a.

In FIG. 1, a bottomed cylindrical pressure vessel 9 having a flange at an opening is mounted in the apparatus main body 2 so as to cover the outer periphery of the rotor 8.
The pressure vessel 9 is made of a non-magnetic material, and is disposed at a predetermined interval between the rotating body 6 and the rotor 8 and heated or cooled to obtain an appropriate temperature. The fluid can be transferred.

  In the gear mechanism 3, as shown in FIG. 1, the drive shaft 12a is connected to the bearing portion 3b, one end of which is biased in the gear mechanism 3, via a ring-shaped bearing member 3a. It is held rotatably.

In the gear mechanism 3, as shown in FIG. 1, a drive gear 3c is externally mounted on the outer periphery of the drive shaft 12a, and the drive gear 3c and the driven gear 3d are held in mesh with each other. .
Therefore, the drive gear 3c is interlocked with the driven gear 3d, and the driven gear 3d is interlocked with the drive shaft 12b disposed on the other end opening side of the apparatus main body 2.
Therefore, by rotating the drive shaft 12 a, a liquid medium (transfer fluid) can be filled into the apparatus main body 2 through the suction port 13 and discharged to the outside through the discharge port 14.
In this embodiment, the drive shaft 12b is also configured such that one end of the drive shaft 12b is rotatably held by the bearing portion 3b biased in the gear mechanism 3 via a ring-shaped bearing member 3a. Has been.

In the gear pump 1 having such a configuration, when an external driving source such as a motor is operated, the driving shaft 4a is rotated by the driving force, and the rotating body 6 integrated with the driving shaft 4a is also rotated at the same time.
Since the outer magnet 7 is disposed and fixed on the inner peripheral surface of the rotating body 6, the outer magnet 7 also rotates at the same time.

  When the inner magnet 9 relatively disposed via the bottomed cylindrical pressure vessel 11 is actuated by the magnetic coupling action by the rotation of the outer magnet 7, the rotor 8 also starts to rotate. It is transmitted to the drive shaft 12a to be connected.

  When the drive shaft 12a is rotated, the drive gear 3c and the driven gear 3d are also rotated at the same time, so that the drive shaft 12b is also rotated. Is.

The magnet coupling portion 5 constitutes a magnet coupling mechanism for driving the gear mechanism 3 by a magnetic coupling action between a plurality of outer magnets 7, 7... And inner magnets 9, 9. Therefore, the transmission torque of the gear pump 1 can be increased.
Therefore, the gear pump 1 can effectively process a high viscosity / high pressure fluid.

In this embodiment, a samarium / cobalt magnet is used as the outer magnet and the inner magnet from the viewpoint of enabling the transfer of a relatively high temperature fluid, but in addition to the samarium / cobalt magnet, a neodymium magnet is used. Other magnets that can be used in magnet gear pumps can also be used.

The magnet gear pump of the present invention has a large transmission torque because the outer magnet and the inner magnet constituting the magnet coupling mechanism are arranged side by side in the axial direction as well as in the circumferential direction. Therefore, it can be used for many pumps.

DESCRIPTION OF SYMBOLS 1,101 Magnet gear pump 2,102 Apparatus main body 2a, 102a Front end opening 2b, 102b Rear end opening 3,103 Gear mechanism 3a, 103a Bearing member 3b, 103b Bearing 3c, 103c Driving gear 3d, 103d Driven gear 4, 104 Bearing portion 4a, 104a Drive shaft (drive shaft for rotating the rotating body)
4b, 104b Bearing 4c, 104c Bearing 4d, 104d Connector 5, 105 Magnet coupling part 6, 106 Rotating body 6a, 106a Fixing member 7, 107 Outer magnet 8, 108 Rotor 8a, 108a Fixing member 9, 109 Inner magnet 10 Fastener (closing member)
10a Inner ring 10b Outer ring 10c Clamping bolts 11, 111 Pressure vessels 12a, 112a Drive shafts 12b, 112b Drive shafts 13, 113 Suction ports 14, 114 Discharge ports

Claims (7)

A magnet gear pump having a magnet coupling mechanism for driving a pump drive body by magnetic coupling between an outer magnet and an inner magnet,
The magnet gear pump is
A cylindrical device body having both ends opened,
The apparatus main body is
Built-in magnet coupling part constituting the magnet coupling mechanism,
The magnet coupling part is
Both ends are open and the outer magnet is provided on the inner periphery, and there is a required gap between the cylindrical rotor that is rotated by an external drive source and the inner periphery of the rotor. It is composed of a rotor that is rotatably arranged and is provided with the inner magnet on the outer periphery so as to face the outer magnet.
The rotating body is
A magnet gear pump characterized in that the opening on the side of the external drive source is configured to be closed by a closing member for fixing a drive shaft connected to the external drive source. The closing member is
An inner ring that is externally fitted to the drive shaft, an outer ring that is disposed so as to close the opening of the rotating body, and that is externally fitted in a tapered fitting state with the inner ring, and the inner ring and the outer ring are tightened in the axial direction The magnet gear pump according to claim 1, wherein the magnet gear pump is a fastener including a fastening bolt. The outer magnet is
A plurality of axially arranged inner circumferential portions of the rotating body are provided,
The inner magnet
3. The magnet gear pump according to claim 1, wherein a plurality of the gear gear pumps are arranged in the axial direction on an outer peripheral portion of the rotor so as to face the outer magnet. The outer magnet and inner magnet are
All are comprised with the samarium cobalt magnet, The magnet gear pump in any one of Claims 1-3 characterized by the above-mentioned. The apparatus main body is
The rear end opening is provided with a gear mechanism as a pump drive that discharges the internal liquid to the outside.
The magnet gear pump according to any one of claims 1 to 4, wherein a bearing portion for bearing the drive shaft of the external drive source is provided at the tip opening located on the external drive source side. The apparatus main body is
The magnet gear pump according to any one of claims 1 to 5, further comprising a bottomed cylindrical pressure vessel having a flange at an opening so as to cover an outer periphery of the rotor. The magnet coupling part that constitutes the magnet coupling mechanism
Both ends are open and the outer magnet is provided on the inner periphery, and there is a required gap between the cylindrical rotor that is rotated by an external drive source and the inner periphery of the rotor. It is composed of a rotor provided with the inner magnet so as to be rotatably arranged and opposed to the outer magnet on the outer periphery.
A method of manufacturing a magnet gear pump, wherein the outer magnet is inserted from both ends of the rotating body, and a plurality of outer magnets are arranged in an axial direction on an inner peripheral portion of the rotating body.

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