JP3263161B2 - Moving magnet type reciprocating fluid machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable magnet type reciprocating fluid machine which can be used for applications such as a fluid pump and a compressor.

[0002]

2. Description of the Related Art Conventionally, a piston provided in a cylinder is connected to a magnetic armature, the magnetic armature is electromagnetically attracted by a fixed electromagnetic circuit, moved forward, and returned by a mechanical return mechanism such as a spring. Electromagnetic reciprocating fluid machines are known.

[0003]

A conventional electromagnetic reciprocating fluid machine combining a magnetic armature and a fixed electromagnetic circuit requires a mechanical return mechanism such as a spring.
There is a problem that the mechanism becomes complicated and the shape becomes large. Also,
In order to increase the operating force of the piston, the magnetic armature and the fixed electromagnetic circuit become large.

In view of the above, the present invention does not require a mechanical return mechanism and can simplify the mechanism.
It is an object of the present invention to provide a movable magnet type reciprocating fluid machine having a large operation force of a reciprocating drive such as a diaphragm.

[0005]

In order to achieve the above object, a movable magnet type reciprocating fluid machine according to the present invention comprises a magnetic movable body provided between at least two permanent magnets having the same polarity and opposed to each other. The magnet movable body is movably provided inside at least three coils in which the mutual positional relationship is regulated to be constant, and the at least three coils are separated by a boundary between magnetic poles of each permanent magnet. A structure in which currents flow in different directions, and a reciprocating drive is provided for a casing chamber provided in a fixed positional relationship with the at least three coils, and the reciprocating drive is connected to the magnet movable body. And

[0006]

In the movable magnet type reciprocating fluid machine of the present invention, a mechanism for driving a piston, a diaphragm and the like reciprocally movable with respect to the casing chamber is provided based on the Fleming left hand rule between the magnet movable body and the coil. A reciprocating actuator that generates an operating force corresponding to the thrust force is used. Therefore, since the electromagnetic reciprocating motion is directly performed by the AC voltage, a mechanical return mechanism such as a spring is not required, and the mechanism can be simplified, and there is no bias in the direction perpendicular to the reciprocating motion of the magnet movable body. The magnet movable body can be smoothly operated. In addition, at least two permanent magnets having the same polarity and provided with a magnetic material are used as the movable magnets, and are connected so that currents flow in different directions between magnetic poles of the respective permanent magnets. Since three coils are used, a large operating force can be obtained by effectively utilizing the magnetic flux generated by each magnetic pole of the permanent magnet.

FIG. 3 is a schematic configuration diagram for explaining the operation principle of a reciprocating actuator used in the movable magnet type reciprocating fluid machine of the present invention, and FIG. 4 is a first diagram of a reciprocating actuator for comparing performance. Comparative Example, FIG. 5 is a second comparative example.

In the reciprocating actuator used in the present invention shown in FIG. 3, the magnet movable body 3 has two columnar permanent magnets 5A, 5B arranged in the same pole opposition, and these permanent magnets 5A, 5B.
The three-piece coils 2A, 2B, and 2C are formed by integrating a columnar soft magnetic body 6 fixed between them.
And the magnetic flux from the magnetic poles at the left end of the permanent magnet 5A, the same pole opposing ends of the permanent magnets 5A and 5B, and the right end of the permanent magnet 5B constituting the magnet movable body 3, respectively. It is arranged to be. These coils 2
A, 2B, and 2C are connected so that current flows in different directions with the boundary between the magnetic poles of the permanent magnets 5A and 5B (the boundary between the magnetic poles is not necessarily at the magnetic pole intermediate position if the magnetic pole is between the magnetic poles). May be.). Although illustration is omitted,
The coils 2A, 2B, 2C are usually mounted on guide cylinders for guiding the magnet movable body 3 movably in the axial direction.
The positional relationship between the coils 2A, 2B, 2C and the magnet movable body 3 is such that in most of the movable positions including when the magnet movable body 3 is stopped, the current flowing through each coil across the permanent magnet magnetic poles mutually. Set in the opposite direction.

On the other hand, in the first comparative example of FIG. 4, reference numeral 10 denotes a magnet movable body made of a rod-shaped permanent magnet magnetized in the axial direction, and has magnetic poles on both end surfaces. Coil 11A, 11
B is wound around the outer periphery of the end portion of the magnet movable body 10 in a ring shape, and the same polarity is generated in adjacent portions. Although not shown, the coils 11A and 11B are usually mounted on a guide cylinder for guiding the magnet movable body 10 movably in the axial direction. The magnetic flux from each end face of the magnet movable body 10 is linked with the coils 11A and 11B, respectively.

In the second comparative example shown in FIG.
Reference numeral 5 denotes two rod-shaped permanent magnets 16A and 16B which are arranged in the same pole opposition.
And a bar-shaped soft magnetic body 17 fixed between the permanent magnets 16A and 16B. The coil 18 is wound around the outer periphery of the intermediate portion of the magnet movable body 15 in an annular manner. Has been turned. Although not shown, the coil 18 is usually mounted on a guide cylinder for guiding the magnet movable body 15 movably in the axial direction. The magnetic flux from the end face of the permanent magnet facing the same pole of the magnet movable body 15 is linked with the coil 18.

By the way, in the first comparative example and the second comparative example, the thrust generated in the magnet movable bodies 10 and 15 basically conforms to the thrust given based on Fleming's left-hand rule (Fleming). Is applied to the coil, but here the coil is fixed, so
A thrust as a reaction force of the force acting on the coil is generated in the magnet movable body. ). Therefore, what contributes to the thrust is the vertical component (the component orthogonal to the axial direction of the permanent magnet) of the magnetic flux of the permanent magnet that the movable magnet has.

[0012] Then, in the case of one permanent magnet or two permanent magnets of the same polarity opposing arrangement, the vertical component of the magnetic flux was analyzed.

FIG. 6 shows the result of a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surface of a single permanent magnet.
However, the permanent magnet is a rare earth permanent magnet and has a diameter of 2.5 m.
m, length 6mm, 0.25 ~ 0.45mm from the surface of permanent magnet
The distance was measured.

FIG. 7 shows the results of a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when two permanent magnets are arranged in the same polarity and are directly joined. . However, each permanent magnet was a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm (6 mm for two pieces), and measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 8 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when the two permanent magnets are arranged at the same pole opposition and the opposing interval is 1 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm, and was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 9 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when the two permanent magnets are arranged in the same pole opposition and the opposing interval is 2 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm, and was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 10 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when the two permanent magnets are arranged at the same pole opposition and the opposing interval is 3 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm, and was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 11 shows a case where two permanent magnets are arranged in the same polarity facing each other and a soft magnetic material having a length of 1 mm is arranged between the two permanent magnets. The result of the magnetic field analysis of the vertical component of the density is shown. However, each permanent magnet was a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm, and was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

FIG. 12 shows two permanent magnets having the same polarity facing each other, a soft magnetic body having a length of 1 mm disposed between the two permanent magnets, and further facing the outer periphery of the two permanent magnets. The result of performing a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side surfaces of the two permanent magnets when the yoke is provided is shown. However, each permanent magnet is a rare earth permanent magnet, having a diameter of 2.5 mm and a length of 3 mm, a yoke having a cylindrical shape surrounding the permanent magnet, a thickness of 0.5 mm, a length of 10 mm and a distance of 1.25 mm from the outer periphery of the permanent magnet. The vertical component of the surface magnetic flux density was measured at a position 0.25 to 0.45 mm away from the surface of the permanent magnet.

As described above, the thrust generated in the magnet movable body basically conforms to the thrust given based on Fleming's left-hand rule, and the vertical component of the magnetic flux of the permanent magnet interlinking with the coil. It is desired that there be many (components orthogonal to the axial direction of the permanent magnet), but in the first comparative example of FIG. 4, the vertical component of the surface magnetic flux density is as shown in FIG.
It has been found that the vertical component is smaller than that in the case where the two permanent magnets shown in FIGS. Therefore, in the configuration of the first comparative example in FIG. 4, there is a limit to the improvement of the thrust. For example, the magnet movable body 10 is 2.5 mm in diameter and 6 mm long.
And two coils 11A, 11A
B so that the same polarity is generated in the adjacent portion of B.
A thrust F1 generated when a current of 40 mA flows through A and 11B was 4.7 (gf).

In the second comparative example shown in FIG. 5, a magnet movable body 15 in which a soft magnetic material is disposed between two permanent magnets having the same polarity is used, and the vertical component of the magnetic flux density is shown in FIG. Thus, the magnetic flux emitted from the magnetic poles of the permanent magnets 16A and 16B opposed to each other with the same polarity is larger than in the case of one permanent magnet (see FIG. 6) or in the case of only two permanent magnets (see FIGS. 7 to 10). However, there is only one coil surrounding the intermediate portion of the movable magnet 15, and there is a dislike that the magnetic flux generated by the magnetic poles on both end surfaces of the movable magnet 15 is not effectively used. For this reason, it was difficult to improve the thrust also in the case of the second comparative example in FIG. For example, in the second comparative example of FIG.
FIG. 4 shows an example in which two rare-earth permanent magnets having a length of 3 mm and a length of 3 mm were used (the performance of the rare-earth permanent magnets was assumed to be the same as that of the first comparative example), and a soft magnetic material having a length of 1 mm was disposed therebetween. First
Coil 18 created to have the same power consumption as the comparative example
And a thrust F2 generated when the same power consumption as that of the first comparative example was applied, was 5.6 (gf).

On the other hand, the structure of the magnet movable body 3 in the reciprocating actuator used in the present invention shown in FIG. 3 is such that two permanent magnets have the same pole opposition and a soft magnetic body is arranged between the permanent magnets as shown in FIG. Things. In the case of FIG. 11, the vertical component of the surface magnetic flux density in the region Q corresponding to the position of the soft magnetic material is:
7 to 10 without the soft magnetic material (the width of the peak with a magnetic flux density of 0.3 T or more is wide and the peak is high).

As described above, the magnet movable body 3 in which the two permanent magnets 5A and 5B are opposed to each other with the same polarity and the soft magnetic body 6 is provided between the permanent magnets can contribute to the thrust based on Fleming's left-hand rule. The magnetic flux component perpendicular to the longitudinal direction of the movable body 3 can be increased, and the three coils 2A, 2B, 2C are effectively linked to the magnetic flux of all the magnetic poles of the permanent magnet, so that the three coils 2A, 2B, 2C By applying a current in a direction in which a magnetic field of the opposite polarity is generated alternately, a large thrust that cannot be reached in Comparative Examples 1 and 2 can be generated. When the current of each coil is reversed, the direction of the thrust of the magnet movable body 3 is also reversed. When an alternating current is passed, it acts as a reciprocating actuator that repeats vibration at a constant cycle.

In the case of FIG. 3 relating to the reciprocating actuator used in the present invention, for example, the magnet movable body 3 has a diameter of 2.5 m.
FIG. 4 shows an example in which two rare-earth permanent magnets having a length of 3 mm and a length of 3 mm were used (the performance of the rare-earth permanent magnets was assumed to be the same as that of the first comparative example), and a soft magnetic material having a length of 1 mm was disposed therebetween. , FIG.
The thrust F3 generated when a current of 40 mA flows through the triple coils 2A, 2B, and 2C created to have the same power consumption as those of the first and second comparative examples and the power consumption is the same is 6.
7 (gf). This is about 1.42 times the thrust of the first comparative example with the same power consumption, and about 1.2 times the thrust of the second comparative example, and is smaller than the first and second comparative examples. You can see that it is much better.

The curve (a) in FIG. 13 is FIG. 3 (without yoke).
The relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the case of (1) is shown. However, the dimensions and characteristics of the permanent magnet are as shown in FIG. 11, and the displacement is zero when the intermediate point of the magnet movable body 3 is located at the intermediate point of the center coil 2B.
The current of each coil was 40 mA.

As described above, in the reciprocating actuator used in the present invention, the magnet movable body is constituted by the structure in which the soft magnetic material is sandwiched between the permanent magnets of the same polarity, and the magnetizing direction (axial Direction) can be made sufficiently large and the magnetic flux generated by all the magnetic poles of the permanent magnet can be used effectively, so that the current flowing through at least three coils surrounding the movable magnet can be reduced. It can be seen that the thrust based on Fleming's left hand rule can be made sufficiently large, and a large thrust can be obtained with a small size and small current. further,
Reciprocating motion of the movable magnet is possible by passing an alternating current through each coil. By connecting the movable magnet to the piston, smooth reciprocating motion is possible without a mechanical return mechanism such as a spring. Can also be simplified.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a movable magnet type reciprocating fluid machine according to the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention. In these, 10 is a reciprocating actuator,
Reference numeral 20 denotes a cylinder chamber as a casing chamber, and reference numeral 30 denotes a piston as a reciprocating drive member slidably provided in the cylinder chamber, which is driven by the reciprocating actuator 10.

The reciprocating actuator 10 has a cylindrical yoke 1 made of a soft magnetic material, three coils 2A, 2B and 2C arranged inside the cylindrical yoke 1, and a magnet movable body 3. The triple coils 2A, 2B, 2C are fixed to the cylindrical yoke 1 with an insulating member (non-magnetic material) such as an insulating resin constituting a guide cylinder 4 for slidably guiding the magnet movable body 3. I have. The magnet movable body 3 is composed of two columnar rare earth permanent magnets 5A and 5B arranged in the same pole opposition, and these permanent magnets 5A and 5B.
A and 5B, and a cylindrical soft magnetic body 6 disposed between the permanent magnets 5A and 5B, and a shaft component 8 disposed on an outer end surface of each of the permanent magnets 5A and 5B.
A, 8B and the non-magnetic cylindrical holder 7, and their permanent magnets 5A, 5B, soft magnetic body 6, and shaft parts 8A, 8B
The disk-shaped portions 9A and 9B are accommodated in the cylindrical holder 7 and fixed by an adhesive or a caulking of the holder end.
The three coils 2A, 2B, 2C are composed of permanent magnets 5A, 5A.
The wires are connected such that currents flow in different directions from the boundary between the magnetic poles of B. That is, the center coil 2B surrounds the ends including the N poles of the soft magnetic body 6 and the permanent magnets 5A and 5B,
The coils 2A, 2C on both sides can surround the ends including the S poles of the permanent magnets 5A, 5B, respectively, and the direction of the current flowing through the center coil 2B, and the coils 2A, 2C on both sides. (See N and S attached to each coil in FIG. 1).

The cylinder chamber 20 is formed on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3, and the shaft 11B of the shaft part 8B is slidably fitted on the right side. The bearing hole 21 is formed. Then, the piston 30 is fixed to a tip end surface of the shaft 11A of the shaft component 8A with a bolt 31. A suction hole 32 is formed in an end face of the piston 30, and a suction valve 33 made of a flexible plate material such as rubber for closing the suction hole 32 is attached to the end face of the piston 30 with the bolt 31. . An intake hole 34 penetrating through the cylindrical yoke 1 and the guide cylinder 4 so as to communicate with a position on the right side of the cylinder chamber 20.
However, an exhaust hole 35 penetrating through the cylindrical yoke 1 and the guide cylinder 4 is formed so as to communicate with the leftward position. A lid 37 is fixed to the cylindrical yoke 1 via an O-ring 36 in order to seal the left opening of the cylinder chamber 20.

In the first embodiment, since the cylindrical yoke 1 made of a soft magnetic material is provided on the outer peripheral side of each of the coils 2A, 2B, 2C of the reciprocating actuator 10, the magnet movable member 3 is provided.
The vertical component of the surface magnetic flux density further increases as shown in FIG. For this reason, the magnetic flux component perpendicular to the longitudinal direction of the magnet movable body 3 that can contribute to the thrust based on Fleming's left hand rule can be increased, and the triple coils 2A, 2B, A larger thrust can be generated by applying a current in a direction in which a magnetic field of the opposite polarity is alternately generated in 2C. For example, two rare-earth permanent magnets having a diameter of 2.5 mm and a length of 3 mm are used as the magnet movable body 3 (the performance of the rare-earth permanent magnet is the same as that of the first comparative example), and a soft magnet having a length of 1 mm is provided between the two. The coils 3A, 2B, and 2 are formed by using a coil having a body disposed therein so as to have the same power consumption as the first and second comparative examples of FIGS.
When a current of 40 mA was passed through C and the power consumption was the same, the thrust F4 generated was 8.0 (gf). The direction of the thrust F4 is the direction in which the magnet movable body 3 moves to the right in the polarity of FIG. 1, and if the current of each coil is reversed, the direction of the thrust of the magnet movable body 3 is also reversed. Therefore, by flowing an alternating current to each coil, the coil functions as a small-sized and large-thrust reciprocating actuator that repeats a reciprocating motion at a constant cycle.

The curve (b) in FIG. 13 shows the first embodiment (however,
The dimensions and arrangement of the permanent magnet and the yoke and the characteristics of the permanent magnet are as shown in FIG. 12). The relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the direction away from the zero displacement point Fig. 5 shows the state when the magnet movable body operates. The curve (c) represents the relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the case of the first embodiment (with yoke), and when the magnet moves in a direction approaching the zero displacement point. Is shown. However, when the intermediate point of the magnet movable body 3 was located at the intermediate point of the center coil 2B, the displacement amount was set to zero, and the current of each coil was set to 40 mA. As described above, the thrust differs depending on whether the magnet movable body 3 approaches or moves away from the point where the displacement amount is zero, because the magnet movable body 3 is located between the magnetic pole of the permanent magnet of the magnet movable body 3 and the yoke 1.
Is returned to the displacement zero point.

As described above, the reciprocating actuator 10 in the first embodiment has a small size and a large thrust. By reciprocating the piston 30 in the cylinder chamber 20, a small and efficient air pump can be obtained. realizable. That is, when the magnet movable body 3 moves to the right in FIG.
Air is sucked in through the suction hole 4 and the suction hole 32, and the magnet movable body 3 is sucked.
The air on the left side of the cylinder chamber can be compressed and sent out through the exhaust hole 35 by the leftward movement of.

FIG. 14 shows a second embodiment of the present invention. In this case, two pump sections 40A and 40B are configured by providing a cylinder chamber, a piston, and the like on both sides of the magnet movable body 3 of the reciprocating actuator 10. In FIG. 14, the configuration of the reciprocating actuator 10 is substantially the same as that of the first embodiment, and a pump section 40A is provided on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3. It is configured. That is, the cylinder chamber 20A is formed on the left side of the guide cylinder 4, and the piston 30A is fixed to the distal end surface of the shaft 11A of the shaft component 8A with the bolt 31A.
A suction hole 32A is formed in the end face of the piston 30A, and a suction valve 33A made of a flexible plate material such as rubber for closing the suction hole 32A is attached to the end face of the piston 30A with the bolt 31A. . A lid 37A is fixed to the cylindrical yoke 1 via an O-ring 36 in order to seal the left opening of the cylinder chamber 20A.
An intake hole 34A penetrating through the cylindrical yoke 1 and the guide cylinder 4 so as to communicate with a position on the right side of the cylinder chamber 20A.
However, exhaust holes 35A are respectively formed in the lid 37A forming the side wall of the cylinder chamber 20A.

Similarly, a pump section 40B is formed on the right side of the guide cylinder 4 for slidably guiding the magnet movable body 3. That is, the cylinder chamber 20B is formed on the right side of the guide cylinder 4, and the piston 30B is fixed to the distal end surface of the shaft 11B of the shaft component 8B with the bolt 31B. A suction hole 32B is formed in the end face of the piston 30B, and a suction valve 33B made of a flexible plate material such as rubber for closing the suction hole 32B is attached to the end face of the piston 30B with the bolt 31B. . A lid 37B is fixed to the cylindrical yoke 1 via an O-ring 36 in order to seal the left opening of the cylinder chamber 20B. An intake hole 34B penetrating through the cylindrical yoke 1 and the guide cylinder 4 so as to communicate with a leftward position of the cylinder chamber 20B is provided with a lid 37B forming a side wall of the cylinder chamber 20B.
Is formed with an exhaust hole 35B.

According to the second embodiment, the two pump sections 40A and 40B can be efficiently driven by the reciprocating actuator 10.

FIG. 15 shows a third embodiment of the present invention. In this case, no check valve is provided at each of the fluid suction port and the fluid discharge port without providing a valve on the piston side. In FIG. 15, the configuration of the reciprocating actuator 10 is the same as that of the first embodiment, and a cylinder chamber 20 is formed on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3. On the right side, a bearing hole 21 is formed in which the shaft 11B of the shaft component 8B is slidably fitted. Then, the piston 30 is fixed to the distal end surface of the shaft 11A of the shaft component 8A with a bolt 31. A connecting block 41 is fixed to the cylindrical yoke 1 via an O-ring 36 so as to seal the left opening of the cylinder chamber 20. The connection block 41 has a fluid passage 42 penetrating from the fluid suction side to the discharge side, and has a communication passage 43 for communicating the fluid passage 42 with the cylinder chamber 20. A suction port component 45 having a fluid suction port 44 communicating with one of the fluid passages 42 is screwed to the connection block 41, and a discharge port component 47 having a fluid discharge port 46 communicating with the other of the fluid passage 42 is connected to the connection block 41. 41 is screwed. Then, the suction port part 45
A valve seat portion 50 provided with a sealing material is formed inside the inside, and a steel ball 51 as a valve body, a spring receiver 52 abutting on the steel ball 51, a compression spring 53, a spring retainer 54, and a suction port part 45 are formed. A retaining ring 55 fixed to the inner surface is provided. A steel ball 51 as a valve body is compressed by a compression spring 53 into a valve seat 50.
, And constitutes a check valve for preventing backflow. Similarly, a valve seat portion 60 provided with a sealing material is formed inside the discharge port component 47, and further includes a steel ball 61 as a valve body, a spring receiver 62 abutting on the steel ball 61, a compression spring 63, and a spring. A presser ring 64 and a retaining ring 65 fixed to the inner surface of the discharge port component 47 are provided. The steel ball 61 as a valve body is urged by a compression spring 63 so as to press against the valve seat portion 60, and constitutes a check valve for preventing backflow.

Also in the third embodiment, the piston 30
Is reciprocated, and the cylinder chamber 2 isolated by the piston 30
By increasing or decreasing the volume of the fluid introduction chamber 70 on the left side of 0, fluid suction from the fluid suction port 44 and fluid discharge from the discharge port 46 can be alternately and repeatedly executed.

FIG. 16 shows a fourth embodiment of the present invention. In this case, a reciprocating diaphragm is used instead of the piston. That is, the configuration of the reciprocating actuator 10 is the same as that of the first embodiment, and the right side of the casing chamber 80 is formed on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3. And the casing chamber 80
A peripheral portion of a thin diaphragm 82 having flexibility (elasticity) is sandwiched and fixed between the end surface of the covered cylindrical body 81 constituting the left portion of the above and the end surface of the guide cylindrical body 4. Covered cylinder 8
Numeral 1 is fixed to the flange of the cylindrical yoke 1 and has an intake hole 83 and an exhaust hole 84. And
Valves 85 and 86 for preventing backflow are provided inside the intake hole 83 and outside the exhaust hole 84, respectively. For example, valve 8
Reference numerals 5 and 86 denote flexible plate members made of rubber or the like, which are fixed to the covered cylinder 81 at one end. The center of the diaphragm 82 is connected to the shaft 11A of the shaft 80A integrated with the magnet movable body 3.

Also in the fourth embodiment, the diaphragm 82 is reciprocated to increase or decrease the volume of the fluid introduction chamber 90 on the left side of the casing chamber 80 separated by the diaphragm 82, so that the air or the like from the intake hole 83 is formed. The suction and the discharge from the exhaust hole 84 can be alternately and repeatedly executed.

[0041]

As described above, according to the movable magnet type reciprocating fluid machine of the present invention, the following effects can be obtained. (1) A reciprocating actuator drives a reciprocating drive such as a piston or a diaphragm. The reciprocating actuator generates a thrust according to Fleming's left-hand rule acting between a permanent magnet and a coil, and the efficiency is low. It is good and small and can generate large thrust. In addition, power consumption can be reduced and heat radiation measures can be easily taken. (2) In a conventional electromagnetic reciprocating fluid machine in which a magnetic armature and a fixed electromagnetic circuit are combined, the magnetic armature tends to be biased, which hinders a smooth reciprocation of the magnetic armature and causes a problem of wear of the magnetic armature. The reciprocating actuator used in the present invention has a thrust based on Fleming's left-hand rule, does not easily cause the magnet movable body to be deflected, has little wear, and can have a long life. (3) Since it can be electromagnetically reciprocated directly by AC voltage,
No mechanical return mechanism such as a return spring is required, and the number of parts can be reduced, the mechanism can be simplified, and the size can be reduced.

[Brief description of the drawings]

FIG. 1 is a first view of a movable magnet type reciprocating fluid machine according to the present invention.
It is a front sectional view showing an example.

FIG. 2 is a side view of the same.

FIG. 3 is a schematic configuration diagram showing a basic configuration of a reciprocating actuator used in the present invention.

FIG. 4 is a schematic configuration diagram showing a first comparative example of a reciprocating actuator.

FIG. 5 is a schematic configuration diagram showing a second comparative example of the reciprocating actuator.

FIG. 6 is a graph showing a vertical component (a component perpendicular to the longitudinal side surface) of a surface magnetic flux density on a longitudinal side surface (a surface parallel to the magnetization direction of the permanent magnet) of a single permanent magnet.

FIG. 7 is a graph showing a vertical component of a surface magnetic flux density on a longitudinal side surface when two permanent magnets having the same polarity are directly opposed to each other.

FIG. 8 is a graph showing a vertical component of a surface magnetic flux density on a longitudinal side surface when two permanent magnets are placed in a same-pole opposing state via an air gap of 1 mm.

FIG. 9 is a graph showing a vertical component of a surface magnetic flux density on a longitudinal side surface when two permanent magnets are placed in a same-pole opposing state via an air gap of 2 mm.

FIG. 10 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are placed in the same pole opposing state via an air gap of 3 mm.

FIG. 11 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are placed in the same pole opposing state via a soft magnetic material.

FIG. 12 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are placed in the same pole opposing state via a soft magnetic material and a soft magnetic material yoke is arranged.

FIG. 13 is a graph showing the relationship between the amount of displacement of the movable magnet and the thrust in the reciprocating actuator of FIGS. 1 and 3;

FIG. 14 is a front sectional view showing a second embodiment of the present invention.

FIG. 15 is a front sectional view showing a third embodiment of the present invention.

FIG. 16 is a front sectional view showing a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical yoke 2A, 2B, 2C Coil 3 Magnet movable body 4 Guide cylindrical body 5A, 5B Cylindrical permanent magnet 6 Cylindrical soft magnetic material 7 Cylindrical holder 8A, 8B Shaft parts 10 Reciprocating actuator 20, 20A, 20B Cylinder Chamber 30, 30A, 30B Piston 32, 32A, 32B Suction hole 33, 33A, 33B Suction valve 34, 34A, 34B, 83 Suction hole 35, 35A, 35B, 84 Exhaust hole 37, 37A, 37B Lid 40A, 40B Pump Part 41 Connection block 42 Fluid passage 43 Communication passage 45 Inlet part 47 Outlet part 80 Casing chamber 81 Covered cylinder 85, 86 Valve

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shigeo Saito 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (58) Field surveyed (Int.Cl. ⁷ , DB name) F04B 17/04

Claims (5)

(57) [Claims] A magnet is provided between at least two permanent magnets of the same polarity facing each other to form a movable magnet, and the magnet is provided inside at least three coils whose positional relationship is regulated to be constant. A movable body is movably provided, and the at least three
A series of coils are connected so that currents flow in different directions across magnetic poles of each permanent magnet, and a reciprocating drive is provided for a casing chamber provided in a fixed positional relationship with the at least three coils. A movable magnet type reciprocating fluid machine characterized in that said reciprocating drive is connected to said magnet movable body. 2. The movable magnet type reciprocating fluid machine according to claim 1, wherein the casing chamber forms a cylinder chamber, and a piston as the reciprocating drive is slidably provided in the cylinder chamber. 3. The reciprocating fluid machine according to claim 2, wherein a suction hole and a suction valve for closing the suction hole are provided on an end face of the piston. 4. The movable magnet type reciprocating fluid machine according to claim 1, wherein the reciprocating drive body is a flexible diaphragm, and a peripheral edge of the diaphragm is fixed to the casing chamber. 5. A movable magnet type reciprocating device according to claim 1, wherein a magnetic yoke is provided on an outer peripheral side of said coil to constitute a magnetic circuit for increasing a magnetic flux component in a direction perpendicular to a magnetization direction of said permanent magnet. Dynamic fluid machinery.