JPH06185456A - Movable magnet type reciprocating fluid machine - Google Patents

Abstract

PURPOSE:To provide a movable magnet type reciprocating fluid machine with which a mechanical return mechanism can be dispensed and by which the mechanism can be simplified and large operating force of a reciprocating driving body such as a piston or a diaphragm can be obtained in a small size. CONSTITUTION:A magnetic substance 6 is arranged between at least two permanent magnets 5A and 5B opposed in the same pole to each other, and a magnetic movable body 3 is constituted, and the magnetic movable body 3 is arranged movably freely inside of at least three-throw coils 2A, 2B and 2C whose mutual positional relationship is regulated to be constant. At least the three- throw coils 2A, 2B and 2C are connected to each other as an electric current flows in a mutually different direction with the center between magnetic poles of the respective permanent magnets 5A and 5B as its boundary, and a piston 30 being a reciprocating driving body is arranged in a cylinder chamber 20 arranged in the constant positional relationship to at least the three-throw coils 2A, 2B and 2C, and the piston 30 is connected to the magnetic movable body 3.

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 in applications such as fluid pumps and compressors.

[0002]

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

[0003]

By the way, a conventional electromagnetic reciprocating fluid machine in which a magnetic armature and a fixed electromagnetic circuit are combined requires a mechanical return mechanism such as a spring,
There are problems that the mechanism becomes complicated and the shape becomes large. Also,
In order to increase the operation force of the piston, the magnetic armature and the fixed electromagnetic circuit become large.

In view of the above points, the present invention does not require a mechanical return mechanism, can simplify the mechanism, and can reduce the size of the piston,
An object of the present invention is to provide a movable magnet type reciprocating fluid machine in which a reciprocating driving body such as a diaphragm has a large operating force.

[0005]

In order to achieve the above object, a movable magnet type reciprocating fluid machine of the present invention has a magnetic body provided between at least two permanent magnets having the same poles and facing each other. The magnet movable body is movably provided inside at least three continuous coils whose mutual positional relationship is regulated to be constant, and the at least three continuous coils are defined by the magnetic poles of the permanent magnets. A structure in which reciprocating drive bodies are provided in a casing chamber provided in a fixed positional relationship with the at least three coils and the reciprocating drive bodies are connected to the magnet movable body so that currents flow in different directions. I am trying.

[0006]

In the movable magnet type reciprocating fluid machine of the present invention, the mechanism for driving the reciprocating piston, diaphragm, etc. with respect to the casing chamber is given based on the left-hand rule of Fleming between the movable magnet body and the coil. It uses a reciprocating actuator that generates an operating force that is similar to the thrust. For this reason, since the electromagnetic reciprocation is directly performed by the AC voltage, a mechanical return mechanism such as a spring is not required, the mechanism can be simplified, and the deviation in the direction perpendicular to the reciprocating motion of the magnet movable body does not occur. Thus, the movable magnet body can be operated smoothly. In addition, as the movable magnet body, a magnet body is provided between at least two permanent magnets facing each other with the same pole, and the magnetic poles of the permanent magnets are used as boundaries to connect at least currents in different directions. Since three coils are used, a large operating force can be obtained by effectively using the magnetic flux generated by each magnetic pole of the permanent magnet.

FIG. 3 is a schematic configuration diagram for explaining the operating principle of a reciprocating actuator used in the movable magnet type reciprocating fluid machine of the present invention, and FIG. 4 is a first reciprocating actuator for comparing performances. 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 includes two cylindrical permanent magnets 5A and 5B having the same poles facing each other, and these permanent magnets 5A and 5B.
The columnar soft magnetic body 6 fixed in between is integrated, and the three coils 2A, 2B, 2C are the magnet movable body 3.
And the magnetic fluxes from the magnetic poles at the left end of the permanent magnet 5A, the opposite ends of the permanent magnets 5A and 5B facing each other, and the right end of the permanent magnet 5B. It is arranged to. These coils 2
A, 2B, and 2C are connected so that currents flow in different directions with the magnetic poles of the permanent magnets 5A and 5B as boundaries (the boundaries between the magnetic poles are not necessarily at the magnetic pole intermediate positions as long as they are between the magnetic poles). Good.). Although illustration is omitted,
The coils 2A, 2B, 2C are usually mounted on a guide cylinder for guiding the movable magnet body 3 so as to be movable in the axial direction.
The positional relationship between the coils 2A, 2B and 2C and the magnet movable body 3 is such that, in most movable positions including the time when the magnet movable body 3 is stopped, the currents flowing through the coils are separated from each other with the permanent magnet magnetic poles as boundaries. Set it so that it is in the opposite direction.

On the other hand, in the first comparative example of FIG. 4, reference numeral 10 denotes a magnet movable body composed of a rod-shaped permanent magnet magnetized in the axial direction and having magnetic poles on both end faces. Coils 11A, 11
B is wound so as to circulate around the outer peripheral side of the end of the magnet movable body 10 in an annular shape, and the same pole is generated in the adjacent portions. Although not shown, the coils 11A and 11B are usually attached to a guide cylinder body for guiding the magnet movable body 10 so as to be movable in the axial direction. The magnetic flux from each end surface of the movable magnet body 10 is linked to the coils 11A and 11B, respectively.

In the second comparative example of FIG. 5, the movable magnet body 1 is used.
Reference numeral 5 is two rod-shaped permanent magnets 16A and 16B having the same pole facing each other.
And a rod-shaped soft magnetic body 17 fixed between these permanent magnets 16A, 16B are integrally fixed, and the coil 18 is wound so as to circulate around the outer peripheral side of the intermediate portion of the magnet movable body 15 in an annular shape. It has been turned. Although not shown, the coil 18 is usually attached to a guide cylinder body for guiding the movable magnet body 15 movably in the axial direction. The magnetic fluxes from the end faces of the permanent magnets of the magnet movable body 15 that face each other in the same pole are 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 is basically similar to the thrust given based on Fleming's left-hand rule (Fleming. The left-hand rule of is applied to the coil, but since the coil is fixed here,
Thrust as a reaction force of the force acting on the coil is generated in the movable magnet body. ). Therefore, it is the vertical component of the magnetic flux of the permanent magnet of the magnet movable body (the component orthogonal to the axial direction of the permanent magnet) that contributes to the thrust.

[0012] Therefore, we analyzed the vertical component of the magnetic flux in the case of one permanent magnet or two permanent magnets of the same pole facing each other.

FIG. 6 shows the results of 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 the permanent magnet
The distant positions were measured.

FIG. 7 shows the result of magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the two permanent magnets are arranged in the same pole and facing each other and are directly bonded. . However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm (two pieces were 6 mm), and measured a position apart from the surface of the permanent magnet by 0.25 to 0.45 mm.

FIG. 8 shows a magnetic field analysis of the vertical component of the surface magnetic flux density along the longitudinal side faces of the two permanent magnets when the two permanent magnets have the same poles facing each other and the facing distance is 1 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the 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 faces of the two permanent magnets when the two permanent magnets have the same poles facing each other and the facing distance is 2 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the 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 faces of the two permanent magnets when the two permanent magnets have the same pole facing each other and the facing distance is 3 mm. The results are shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the 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 so as to face each other with the same pole and a soft magnetic material having a length of 1 mm is arranged between the two permanent magnets. The result of magnetic field analysis of the vertical component of the density is shown. However, each permanent magnet was a rare earth permanent magnet, had a diameter of 2.5 mm and a length of 3 mm, and measured the position 0.25 to 0.45 mm away from the surface of the permanent magnet.

In FIG. 12, two permanent magnets are arranged with the same poles facing each other, a soft magnetic material having a length of 1 mm is arranged between the permanent magnets, and the soft magnetic material is further opposed to the outer circumferences of the two permanent magnets. The results of 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 arranged are shown. However, each permanent magnet is a rare earth permanent magnet and has a diameter of 2.5 mm and a length of 3 mm, and the yoke has a cylindrical shape surrounding the permanent magnet and has a thickness of 0.5 mm and a length of 10 mm, and is separated from the outer circumference of the permanent magnet by 1.25 mm. 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 is basically similar 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. Although it is desired that there are many (components orthogonal to the axial direction of the permanent magnet), in the first comparative example of FIG. 4, the vertical component of the surface magnetic flux density is as shown in FIG.
It was found that the vertical component was smaller than that in the case where the two permanent magnets in FIG. Therefore, the structure of the first comparative example in FIG. 4 has a limit in improving the thrust. For example, the magnet movable body 10 has a diameter of 2.5 mm and a length of 6 mm.
2 coils 11A, 11
Each coil 11 so that the same pole is generated in the adjacent portion of B
The thrust F1 generated when a current of 40 mA was applied to A and 11B was 4.7 (gf).

Further, in the second comparative example of FIG. 5, a magnet movable body 15 in which a soft magnetic material is arranged between two permanent magnets of the same pole facing each other is used, and the vertical component of the magnetic flux density is shown in FIG. Thus, the magnetic flux generated from the magnetic poles of the permanent magnets 16A and 16B having the same poles facing each other is larger than in the case of one permanent magnet (see FIG. 6) or the case of only two permanent magnets (see FIGS. 7 to 10). However, there is only one coil that surrounds the intermediate portion of the magnet movable body 15, and there is a dislike that the magnetic flux generated by the magnetic poles on both end surfaces of the magnet movable body 15 is not effectively used. For this reason, it was difficult to improve the thrust force also in the case of the second comparative example in FIG. For example, in the second comparative example of FIG. 5, the magnet movable body 15 has a diameter of 2.5 m.
As shown in FIG. 4, two rare earth permanent magnets with a length of 3 mm and a length of 3 mm are used (the performance of the rare earth permanent magnet is the same as that of the first comparative example), and a soft magnetic material with a length of 1 mm is arranged between them. First of
Coil 18 created to have the same power consumption as the comparative example
A thrust F2 generated when a current of 40 mA was applied to the same and the same power consumption as in the first comparative example was 5.6 (gf).

On the other hand, in the structure of the movable magnet body 3 in the reciprocating actuator used in the present invention of FIG. 3, as shown in FIG. 11, two permanent magnets have the same poles facing each other and a soft magnetic body is arranged between the permanent magnets. It is a thing. In the case of FIG. 11, the vertical component of the surface magnetic flux density in the region Q corresponding to the soft magnetic material position is
It is superior to FIGS. 7 to 10 without the soft magnetic material (the peak width of the 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 pole 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 triple coils 2A, 2B, 2C effectively interlink with the magnetic fluxes of all the magnetic poles of the permanent magnet, so that the triple coils 2A, 2B, 2C. By alternately passing a current in the direction in which a magnetic field of opposite polarity is generated, a large thrust that cannot be reached in Comparative Examples 1 and 2 can be generated. If the current of each coil is reversed, the direction of the thrust of the movable magnet body 3 is also reversed. When an alternating current is applied, it works 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.
As shown in FIG. 4, two rare earth permanent magnets with a length of 3 mm and a length of 3 mm are used (the performance of the rare earth permanent magnet is the same as that of the first comparative example), and a soft magnetic material with a length of 1 mm is arranged between them. , Fig. 5
The thrust F3 generated when a current of 40 mA is applied to the triple coils 2A, 2B, and 2C that are made to have the same power consumption as those of the first and second comparative examples, and the power consumption is the same is 6.
It was 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, which is in comparison with the first and second comparative examples. It turns out that it is remarkably excellent.

The curve (a) in FIG. 13 is shown in FIG. 3 (without yoke).
The relationship between the axial displacement amount of the magnet movable body 3 and the thrust force (gf) in the case of is shown. However, the dimensions and characteristics of the permanent magnet are as shown in FIG. 11, and the displacement amount is zero when the midpoint of the magnet movable body 3 is located at the midpoint of the central 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 having the same poles facing each other. Direction) and the magnetic flux generated by all the magnetic poles of the permanent magnet can be effectively used. Therefore, between the current flowing in at least three coils surrounding the magnet movable body, 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 a small current. further,
A reciprocating motion of the magnet movable body is possible by applying an alternating current to each coil, and a smooth reciprocating motion is possible by connecting the magnet movable body to the piston without a mechanical return mechanism such as a spring. Can 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.

1 and 2 show a first embodiment of the present invention. Of these, 10 is a reciprocating actuator,
Reference numeral 20 is a cylinder chamber as a casing chamber, and 30 is 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, 2C arranged inside the cylindrical yoke 1, and a magnet movable body 3. The three coils 2A, 2B and 2C are fixed to the cylindrical yoke 1 by an insulating member (non-magnetic material) such as an insulating resin forming a guide cylinder 4 for slidably guiding the magnet movable body 3. There is. The magnet movable body 3 includes two columnar rare earth permanent magnets 5A and 5B arranged in the same pole and facing each other, and these permanent magnets 5
A cylindrical soft magnetic body 6 arranged between A and 5B, and a shaft component 8 arranged on the outer end surface of each permanent magnet 5A, 5B.
A, 8B and a 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 housed in the cylindrical holder 7 and fixed by an adhesive agent or caulking of the holder end portion.
The three continuous coils 2A, 2B, 2C are permanent magnets 5A, 5
The magnetic poles of B are connected so that currents flow in different directions. That is, the central coil 2B surrounds the ends of the soft magnetic material 6 and the permanent magnets 5A and 5B including the N pole,
The coils 2A and 2C on both sides can surround the ends including the S poles of the permanent magnets 5A and 5B, respectively, and the direction of the current flowing through the central coil 2B and the coils 2A and 2C on both sides. Is opposite to the direction of the current (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 component 8B is slidably fitted on the right side. The bearing hole 21 is formed. The piston 30 is fixed to the tip end surface of the shaft 11A of the shaft component 8A with bolts 31. A suction hole 32 is formed in the end surface of the piston 30, and a suction valve 33 made of a flexible plate such as rubber that closes the suction hole 32 is attached by the bolt 31 so as to overlap the end surface of the piston 30. . Intake hole 34 penetrating the cylindrical yoke 1 and the guide cylinder 4 so as to communicate with the rightward position of the cylinder chamber 20.
However, an exhaust hole 35 penetrating 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 to seal the left opening of the cylinder chamber 20.

In this first embodiment, since the reciprocating actuator 10 is provided with the soft magnetic cylindrical yoke 1 on the outer peripheral side of each coil 2A, 2B, 2C, the magnet movable body 3 is provided.
The vertical component of the surface magnetic flux density of is further increased as shown in FIG. Therefore, the magnetic flux component perpendicular to the longitudinal direction of the magnet movable body 3 that can contribute to the thrust force based on Fleming's left-hand rule can be increased, and three coils 2A, 2B, which are wound around the magnet movable body 3 in an annular shape, An even greater thrust can be generated by passing a current through 2C in the direction in which a magnetic field of opposite polarity is generated alternately. 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 magnetic material having a length of 1 mm is provided between the two. Three coils 2A, 2B, 2 made by using the body arranged so as to have the same power consumption as the first and second comparative examples of FIGS. 4 and 5.
The thrust F4 generated when a current of 40 mA was applied to C and the power consumption was the same was 8.0 (gf). In the polarity of FIG. 1, the direction of the thrust F4 is the direction in which the magnet movable body 3 moves to the right, and if the current of each coil is reversed, the direction of the thrust of the magnet movable body 3 is also reversed. Therefore, when an alternating current is passed through each coil, it functions as a small-sized reciprocating actuator having a large thrust that repeats reciprocating motion at a constant cycle.

The curve (b) in FIG. 13 is the curve of the first embodiment (however,
The dimensions and arrangement of the permanent magnets and yokes and the characteristics of the permanent magnets are as shown in FIG. 12, and are the relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the direction away from the zero displacement amount. Shows when the movable magnet body operates. Further, the curve (c) is the relationship between the axial displacement of the magnet movable body 3 and the thrust (gf) in the case of the first embodiment (with a yoke), and when operating in the direction approaching the point of zero displacement. Indicates. However, the displacement amount was set to zero when the midpoint of the movable magnet body 3 was located at the midpoint of the central coil 2B, and the current of each coil was set to 40 mA. Thus, the thrust differs depending on whether the movable magnet body 3 approaches or moves away from the point where the displacement amount is zero, because the movable magnet body 3 is located between the magnetic pole of the permanent magnet of the movable magnet body 3 and the yoke 1.
This is because the magnetic attraction force that returns the zero to the displacement zero point is working.

As described above, the reciprocating actuator 10 in the first embodiment has a small size and a large thrust, so that by reciprocating the piston 30 in the cylinder chamber 20, a small and efficient air pump can be obtained. realizable. That is, when the movable magnet body 3 moves to the right in FIG. 1, the intake valve 33 opens and the intake hole 3 is provided on the left side of the cylinder chamber 20.
4 and the suction hole 32 to suck in air to move the magnet movable body 3
The air on the left side of the cylinder chamber can be compressed by the leftward movement of the above and can be sent out through the exhaust hole 35.

FIG. 14 shows a second embodiment of the present invention. In this case, a cylinder chamber, a piston and the like are provided on both sides of the magnet movable body 3 of the reciprocating actuator 10 to form two pump parts 40A and 40B. In FIG. 14, the structure of the reciprocating actuator 10 is substantially the same as that of the first embodiment described above, and the pump portion 40A is provided on the left side of the guide cylinder body 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 tip end surface of the shaft 11A of the shaft component 8A with the bolt 31A.
A suction hole 32A is formed in the end surface of the piston 30A, and a suction valve 33A made of a flexible plate such as rubber that closes the suction hole 32A is attached to the end surface of the piston 30A by the bolt 31A. . A lid 37A is fixed to the cylindrical yoke 1 via an O-ring 36 to seal the left opening of the cylinder chamber 20A.
Intake hole 34A penetrating the cylindrical yoke 1 and the guide cylinder 4 so as to communicate with the rightward position of the cylinder chamber 20A.
However, an exhaust hole 35A is formed in each of the lids 37A forming the side wall of the cylinder chamber 20A.

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

According to the second embodiment, the reciprocating actuator 10 can efficiently drive the two pump units 40A and 40B.

FIG. 15 shows a third embodiment of the present invention. In this case, a valve is not provided on the piston side, but check valves are provided at the fluid intake port and the fluid discharge port, respectively. In FIG. 15, the structure of the reciprocating actuator 10 is the same as that of the first embodiment described above, and the cylinder chamber 20 is formed on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3. A bearing hole 21 into which the shaft 11B of the shaft component 8B is slidably fitted is formed on the right side. The piston 30 is fixed to the tip surface of the shaft 11A of the shaft component 8A with bolts 31. A connecting block 41 is fixed to the cylindrical yoke 1 via an O-ring 36 so as to seal the left side 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 also has a communication passage 43 that connects the fluid passage 42 and the cylinder chamber 20. A suction port component 45 having a fluid suction port 44 communicating with one side of the fluid passage 42 is screwed to the coupling block 41, and a discharge port component 47 having a fluid discharge port 46 communicating with the other side of the fluid channel 42 is the coupling block. It is screwed to 41. Then, the inlet part 45
A valve seat portion 50 provided with a sealing material is formed in the inside thereof, and a steel ball 51 as a valve body, a spring receiver 52 that abuts on the steel ball 51, a compression spring 53, a spring retainer 54, and an intake port component 45. A retaining ring 55 fixed to the inner surface is provided. The steel ball 51 serving as the valve body is provided with the compression spring 53 and the valve seat portion 50.
It is urged to come into pressure contact with 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 a steel ball 61 as a valve body, a spring receiver 62 abutting on the steel ball 61, a compression spring 63, a spring. A retainer 64 and a retaining ring 65 fixed to the inner surface of the discharge port component 47 are provided. A steel ball 61 as a valve element is biased by a compression spring 63 so as to come into pressure contact with the valve seat portion 60, and constitutes a check valve for preventing backflow.

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

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 structure of the reciprocating actuator 10 is the same as that of the first embodiment described above, and the right portion of the casing chamber 80 is formed on the left side of the guide cylinder 4 for slidably guiding the magnet movable body 3. Cage, casing chamber 80
A peripheral edge portion of a flexible (elastic) thin plate-shaped diaphragm 82 is sandwiched and fixed between the end surface of the covered cylindrical body 81 and the end surface of the guide cylindrical body 4 which form the left part of the. Covered cylinder 8
1 is fixed to the flange portion 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. Valve 8 for example
Reference numerals 5 and 86 denote flexible plate materials such as rubber, which are fixed to the covered tubular body 81 at one end. The central portion of the diaphragm 82 is connected to a shaft 11A of a shaft portion 80A that is integral with the magnet movable body 3.

In the fourth embodiment as well, 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 isolated by the diaphragm 82, so that air from the suction hole 83 for air or the like is introduced. The suction and the discharge from the exhaust hole 84 can be alternately repeated.

[0041]

As described above, according to the movable magnet type reciprocating fluid machine of the present invention, the following effects can be obtained. (1) The reciprocating actuator is configured to drive a reciprocating driving body such as a piston or a diaphragm. The reciprocating actuator generates a thrust force that acts between the permanent magnet and the coil in accordance with Fleming's left-hand rule, and thus the efficiency is high. It is good, small, and capable of generating large thrust. In addition, power consumption can be reduced and heat dissipation can be easily taken. (2) In a conventional electromagnetic reciprocating fluid machine that combines a magnetic armature and a fixed electromagnetic circuit, the magnetic armature is easily biased, which hinders smooth reciprocating motion of the magnetic armature and wear of the magnetic armature poses a problem. The reciprocating actuator used in the present invention is a thrust force based on Fleming's left-hand rule, so that the displacement of the magnet movable body is unlikely to occur, the problem of wear is small, and the life can be extended. (3) Since it can be directly electromagnetically reciprocated by AC voltage,
Since a mechanical return mechanism such as a return spring is not required, the number of parts can be reduced, the mechanism can be simplified, and the size can be reduced.

[Brief description of drawings]

FIG. 1 is a first diagram of a movable magnet type reciprocating fluid machine according to the present invention.
It is a right 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 a reciprocating actuator.

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

FIG. 7 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets of the same pole facing each other are directly brought into contact with each other.

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

FIG. 9 is a graph showing the vertical component of the surface magnetic flux density on the longitudinal side surface when two permanent magnets are in the same pole facing state with 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 in the same pole facing state with 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 in the same pole facing state with a soft magnetic material interposed therebetween.

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 in the same pole facing state with a soft magnetic material interposed 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 body 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]

 1 Cylindrical yoke 2A, 2B, 2C Coil 3 Magnet movable body 4 Guide cylinder 5A, 5B Cylindrical permanent magnet 6 Cylindrical soft magnetic body 7 Cylindrical holder 8A, 8B Axial component 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 Intake 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 Suction port component 47 Discharge port component 80 Casing chamber 81 Covered cylinder 85,86 Valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Saito 1-13-1, Nihonbashi, Chuo-ku, Tokyo TDK Corporation

Claims (5)

[Claims] 1. A magnet movable body is provided by providing a magnetic body between at least two permanent magnets facing each other of the same pole, and the magnet is provided inside at least three continuous coils whose mutual positional relationship is regulated to a constant value. A movable body is movably provided, and the at least 3
A series of coils is connected so that currents flow in different directions with the magnetic poles of the permanent magnets as boundaries, and a reciprocating driver is provided in a casing chamber provided in a fixed positional relationship with the at least three series of coils. At the same time, the reciprocating driving body is connected to the magnet movable body, and a reciprocating fluid machine of a movable magnet type is characterized. 2. The movable magnet type reciprocating fluid machine according to claim 1, wherein the casing chamber constitutes a cylinder chamber, and a piston as the reciprocating driving member is slidably provided in the cylinder chamber. 3. The movable magnet type 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 surface of the piston. 4. The movable magnet type reciprocating fluid machine according to claim 1, wherein the reciprocating driving body is a flexible diaphragm, and a peripheral edge portion of the diaphragm is fixed to the casing chamber. 5. The reciprocating movable magnet type reciprocating device according to claim 1, wherein a magnetic yoke is provided on the outer peripheral side of the coil to form a magnetic circuit for increasing a magnetic flux component in a direction perpendicular to the magnetizing direction of the permanent magnet. Dynamic fluid machinery.