JP3370657B2 - Electromagnetic vibration type pump - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electromagnetic vibration type pump. More specifically, the present invention relates to an electromagnetic vibration type pump mainly used for intake and exhaust of air to an indoor air mat or an air bed, oxygen supplementation in a fish tank, a domestic septic tank, etc., or sampling of inspection gas in pollution monitoring.

[0002]

2. Description of the Related Art Conventionally, a diaphragm type electromagnetic pump has been used as an electromagnetic vibration type pump for sucking and discharging a fluid by utilizing the vibration of a vibrator equipped with the permanent magnet based on the magnetic interaction between an electromagnet and a permanent magnet. There is a pump.

This pump is fixed to both ends of the electromagnet part, an electromagnet part composed of electromagnets arranged facing each other, a vibrator provided with permanent magnets, a diaphragm connected to both ends of the vibrator, and a diaphragm connected to both ends of the vibrator. The diaphragm base and the pump casing, and the pump compression chamber formed between the diaphragm and the pump casing. The electromagnet is completed by incorporating a coil part wound into an E-shaped iron core, and the vibrator is arranged in a void formed between the iron cores.

In such a pump, the vibration of the oscillator supported by the diaphragm causes the volume of the pump compression chamber to increase / decrease in a left-right contradictory manner, whereby air is sucked and discharged alternately in the left-right direction.

The permanent magnet of the vibrator used in this conventional pump is a polar anisotropic magnet or an isotropic magnet, and a bond magnet is generally used. For example, as shown in FIGS.
Nos. 0 and 201 are attached to a shaft 203 having a quadrangular (square column type) outer shape in which screws 202 are embedded at both ends, and one of the pair of permanent magnets 201 has one of the permanent magnets 201 in the circumferential direction. The polarities of the N pole and the S pole are alternately magnetized to polar anisotropic magnetic poles at the location, and the other permanent magnet 2
Contrary to the permanent magnet 201 having the opposite polarity of 00, the polarities of the S pole and the N pole are alternately magnetized to polar anisotropic magnetic poles at four locations in the circumferential direction.

[0006]

Conventionally, it has been desired that the pump be small in size and have improved pump performance such as characteristics during operation.

However, for example, with the miniaturization of pumps,
In order to increase the pump capacity, stronger magnets are required. The polar anisotropy sintered magnet can be magnetized similarly to the bonded magnet and can be adopted without any problem, but both of them are magnets having a special shape, so that there is a problem that the manufacturing method is expensive.

In view of the above circumstances, it is an object of the present invention to provide an electromagnetic vibration type pump which is small and which can improve the operating characteristics and / or controllability of the pump.

[0009]

An electromagnetic vibration pump according to the present invention comprises an electromagnet section composed of an iron core and a winding coil section, a vibrator supported in the electromagnet section and provided with a quadrangular magnet, An electromagnetic vibration type pump comprising pump casing parts fixed to both sides of an electromagnet part,
When the square magnet is made of an anisotropic sintered metal magnet body ,
The sintered metal magnet body is composed of four sintered metal magnets and an outer shape.
Is composed of a tubular magnetic body having a square shape, and the outer periphery of the magnetic body
The sintered metal magnet is fixed to the portion .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The electromagnetic vibration type pump of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, an electromagnetic vibration type pump according to an embodiment of the present invention includes an electromagnet unit 1.
A vibrator 3 having square magnets 2 arranged at a predetermined interval in a space in the electromagnet unit 1, a diaphragm 4 connected to both ends of the vibrator 3, and the electromagnet unit 1 The pump casing 5 is fixed to both ends of the pump casing 5. The pump casing portion 5 is composed of a pump casing 6 and a side surface lid portion (valve chamber lid portion) 8 fixed to the side surface side of the pump casing 6 with a packing 7 interposed therebetween. Mounting legs 9 are integrated with the side cover 8 so that the pump body can be easily mounted on the mounting portion. In addition, 10 is a stepped cushion that absorbs vibration of the pump portion. Further, the material of the side cover portion 8 is preferably a glass fiber-containing thermoplastic resin in terms of strength.

The pump casing 6 further has a pump portion composed of a suction chamber 11, a discharge chamber 12 and a compression chamber 13. The suction chamber 11 is connected to the suction port 14 in order to communicate with the compression chamber 13. The suction valve 15 is provided, and the discharge chamber 12 is provided with a discharge port 16 and a discharge valve 17, respectively.

The electromagnet section 1 is not particularly limited, but for example, as shown in FIG. 2, a pair of large-diameter iron cores (main iron cores) 18 and a pair of large-diameter iron cores arranged to face each other in a cross shape. An electromagnet composed of a winding coil portion incorporated in an inner peripheral recessed portion of 18, a pair of small-diameter iron cores (auxiliary iron cores) 19 without windings, and a pair of large-diameter iron cores 18 and small-diameter iron cores And a square tubular core holder (core) 20 and a resin-molded frame portion 21 is formed on the outer surface. The large-diameter iron core 18 and the small-diameter iron core 19 both have an E-shaped cross section, and the pair of large-diameter iron cores 18 and the pair of small-diameter iron cores 19 face each other, and the opening side forms a cruciform shape. It is located in. The iron core holder 20 ensures positioning of the large-diameter iron core 18 and the small-diameter iron core 19, and properly holds the large-diameter iron core 18 and the small-diameter iron core 19 during molding. In addition, the large-diameter iron core 18 and the small-diameter iron core 19 have an iron core holder 20 for easy positioning and attachment.
When the resin is molded on the outer surface, the resin can be easily inserted into the mold at the time of molding and can withstand a high resin pressure at the time of molding.

As the material of the iron core holder 20, a heat-resistant resin or a non-magnetic metal such as aluminum which can withstand heat of about 150 degrees during molding can be used. Further, as the material of the frame portion 21, BMC (bulk molding compound) which is a molding material and which has heat resistance and a low shrinkage ratio is preferable, and for example, unsaturated polyester BMC can be used.

[0015] The rail body portion 21, a pair of small径鉄heart 19
An intake tank portion 22 and an exhaust tank portion 23 are formed at the outer peripheral portion of the side at the same time when the electromagnet is molded with a thermosetting resin. Further, the tank portions 22 and 23 have a silencer function. In addition, the tank portion 22,
By disposing a filter made of felt or polyester fiber in 23, impurities such as dust are removed when the air passes through the filter, so that clean air can be discharged. A lid 25 having a suction portion 24 is fixed to the tank portion 22, and a lid 27 having a discharge portion 26 is fixed to the tank portion 23.

As shown in FIGS. 3 to 4, the vibrator 3 has a quadrangular non-magnetic rod 31 having screws 30 implanted at both ends thereof and a quadrangular shape attached to the non-magnetic rod 31. An anisotropic sintered metal magnet body having a quadrangular outer shape is used as the quadrangular magnet 2. It is desirable to apply a non-conductive rust preventive material to this surface. This sintered metal magnet body has four lengths longer than the size of the opening between the magnetic poles of the large-diameter iron core and the small-diameter iron core. It is composed of a magnet 32a and a magnetic body 32b, and the sintered metal magnet 32a is fixed to the outer peripheral portion of the magnetic body 32b by adhesion or the like. Then, of the pair of sintered metal magnet bodies, one of the sintered metal magnet bodies is alternately magnetized at four positions in the circumferential direction with the polarities of the N pole and the S pole, and the polarity of the other sintered metal magnet body. Opposite to the sintered metal magnets facing each other, S is placed at four locations in the circumferential direction.
The polarities of the poles and the N poles are alternately magnetized. The magnetic poles (N pole, S pole) of each sintered metal magnet 32a can be magnetized before assembling the oscillator or after assembling the oscillator. The magnetic body 32b is a square tube and serves as a magnetic path, so that the magnetic flux of the magnet can be effectively utilized.
As the non-magnetic rod 31, for example, 66 nylon containing 30% glass can be used.

Although the cross-sectional shape of the sintered metal magnet is rectangular, it is not particularly limited in the present invention. For example, as shown in FIG. Can be With this semi-cylindrical sintered metal magnet 40, it is possible to prevent the risk of contact between the corners of the sintered metal magnet 40 and the iron core of the electromagnet portion. Further, the magnetic body 32b is not limited to a square tube, and may be a tube having an outer diameter of a square. For example, as shown in FIGS. 6 to 7, a thin electric iron plate (silicon steel plate) or the like. It is possible to form a laminated body 41 in which a plurality of thin core bodies 41a having a square outer diameter and punched inner holes are laminated. In addition, although it is applied to the sintered metal magnet 32 a in FIG. 6, it is also applicable to the sintered metal magnet 40.

The magnetic flux distributions of the anisotropic sintered metal magnet and the conventional polar anisotropic magnet will now be described. As shown in FIG. 8, the magnetic flux distribution of the conventional polar anisotropic magnet 201 is mountain-shaped. On the other hand, in the case of the magnet 2 using the sintered metal magnet 32a having a trapezoidal cross section and the magnetic body 32b having a rectangular tube shape, the magnetic flux distribution (see FIG. 9A) is concave at the center and convex at both ends. Distribution. In addition, when a sintered metal magnet 40 having a semi-cylindrical cross section with a curved outer surface is used, the magnetic flux distribution (see FIG.
(See (b)) has a flat distribution of the magnetic flux density in the central portion.
Therefore, it is possible to obtain almost the same magnetic flux distribution as compared with the conventional magnetic flux distribution, and it is desirable to determine the optimum distribution by taking the curvature. As shown in FIG. 9C, the magnetic flux distribution when the laminated body 41 is applied to the sintered metal magnet 32a has a shape in which the central concave portion is relaxed in the distribution of FIG. 9A. Since it is distributed, the distribution shape is slightly improved, but the weight is increased and the cost is likely to increase.

The thickness and shape of the magnet determine the magnetic flux distribution and the magnetic flux density of the air gap, and are important dimensions that determine the pump performance.
Further, since the magnetic resistance, the magnetic flux distribution, and the weight change depending on the thickness of the magnetic path, and the performance as a vibrator is affected, the characteristics and thickness of the magnet are taken into consideration when making the determination.

The peak shape shown in FIG. 8 is the best for the magnetic flux distribution, and a large concave distribution in the center of the peak tends to cause a magnetic flux twist (uneven void size), which may cause contact between the electromagnet and the vibrator. Will increase.

Next, another embodiment of the present invention will be described. As shown in FIG. 10, in the pump according to the present embodiment, the intake side lid 25 has a cup shape, and a pump controller (controller) for controlling the pump,
Of the operation detecting device including the detecting means S, the detecting means S is housed in the tank portion 22. In the present embodiment, the operation detecting device is a diaphragm breakage detecting device, and the detecting means S is a differential pressure detecting bellows pipe having a safety switch function for detecting the internal pressure of the pump portion of the pump casing portion 5. ing. The operation detection device is not limited to the diaphragm damage detection device,
It can be an overcurrent detection device (thermal protector).

In the present embodiment, as shown in FIGS. 10 to 11, the large-diameter iron core 18 and the small-diameter iron core 19 containing the winding coil portion are respectively arranged in the outer yoke portions 18a and 1a.
9a, side poles 18b and 19b, and center poles 18c and 19c, and when the pump is stopped, the square magnet 2 of the vibrator 3 and the center poles 18c and 19c.
The dimension (overhang amount) a of the overlapping portion (overlap portion) of the magnetic pole portion (main pole portion) of c overlaps the square magnet 2 and the magnetic pole portions (auxiliary pole portion) of the side pole portions 18b and 19b. It is made larger than the dimension b of the part. This can be set, for example, by offsetting the quadrangular magnet 2 toward the center pole portions 18c, 19c with respect to the openings between the magnetic pole portions of the iron cores 18, 19. The amount of overhang in the relative position between the quadrangular magnet 2 and the openings between the magnetic pole portions of the iron cores 18 and 19 can be appropriately set. For example, a can be 3 mm and b can be 1 mm.

Here, a pump having a flow rate rating of 80 L / min is used, and a pump having different overlapping portions (a> b) of magnetic pole portions and a pump having uniform overlapping portions (a = b) in the present embodiment are used. The operating characteristics will be described. In the present embodiment, as shown in FIG. 12A, the vibrator 3 moves in the leftward direction F1.
When moving to, first the commutating pole portion (S pole) of the left side pole portion 18b and the left side square magnet 2 (N pole) approach,
A sudden change in reluctance (magnetic resistance) occurs during suction. Then, as shown in FIG. 12B, when the oscillator 3 further moves in the leftward direction F2, the commutating pole portion (S pole) of the right side pole portion 18b and the right square magnet 2 (S pole).
Pole) and a sudden reluctance change occurs continuously. Subsequently, as shown in FIG.
When the oscillator 3 further moves in the leftward direction F2, the main pole portion (N pole) of the center pole portion 18c and the left square magnet 2
A sudden change in reluctance at the time of repulsion with (N pole) also occurs continuously in the same manner.

Therefore, in this embodiment, if the overhang on the main pole side of the iron core is made larger than the overhang on the supplementary pole, the amount of magnetic flux when the pump is stopped is larger than that on the supplementary pole. The magnet position at the time of stop is stable, and at the time of vibration, the thrust proportional to the degree of change and the number of reluctance increases, and as shown in Table 1, the power supply frequency is 50 Hz.
At 60 Hz and 60 Hz, it is understood that the characteristics during operation are improved because the flow rate is increased.

[0025]

[Table 1]

On the other hand, in the case of a pump having an evenly overlapped portion, as shown in FIGS. 13 (a) and 13 (b), the vibrator 3a having the square magnet 2 is arranged in the leftward direction F1 and further in the leftward direction F2. When moving, the left side pole portion 18b attracts the compensating pole portion (S pole) and the left side square magnet 2 (N pole), and the center pole portion 18c main pole portion (N pole) and the left side square magnet. Repulsion with 2 (N pole) occurs intensively once each. Therefore, since there is no continuous change in reactance as in a pump having different overlapping portions shown in FIG. 12B, thrust is inferior, and as shown in Table 1, it can be seen that the flow rate is small. According to electromagnetics, the thrust F is given by F = −1 / 2φ ² dR / dx, where φ is the magnetic flux, R is the reluctance, and x is the displacement. This indicates that the change in reluctance contributes to the magneto-mechanical energy conversion between the magnetic field and the mechanical system.

Next, still another embodiment of the present invention will be described. In this embodiment, the magnetic flux of the magnet is effectively used,
The iron core is overhanged to improve the pump's operating characteristics. That is, as shown in FIG. 14A, the shortest dimension d between the large-diameter iron core 18 and the small-diameter iron core 19 that are adjacent to each other at a right angle is narrowed as much as possible so as not to hinder the assembly of these iron cores. Iron core 18 and small diameter iron core 1
As shown in FIGS. 14B and 15, the width dimension of 9 is larger than the width dimension of the square magnet 2. Since the large-diameter iron core 18 and the small-diameter iron core 19 are manufactured by laminating a plurality of steel plates in the present embodiment, the width of these iron cores is the iron core product thickness H. In addition, the code | symbol 45 in FIGS. 15-16 is a winding coil part.

The iron core product thickness H (mm) is the square magnet 2
Is determined by the gap size G between the core and the iron core 18, 19. That is, the iron core product thickness H is expressed by the following equation (1) or equation (2). Iron core product thickness H = Magnet pole width L + 2 x Air gap size G-1 (1)

This is the iron core product thickness H = maximum dimension Hmax-1.
Is. It should be noted that 1 mm is a margin value in consideration of variations in product thickness. Or as a recommended value, iron core product thickness H = magnet pole width L + 2 × gap dimension G (1-1 / √2) (2)

This equation (2) is represented by d in FIG. 14 (a).
The iron core product thickness H is such that the size is equal to the air gap size G between the square magnet 2 and the iron cores 18 and 19.

When the iron core product thickness H is set, the following effects and are obtained. The leakage flux between adjacent electromagnets increases, the inductance increases (permeance increases), and the effect of suppressing the current increases. Due to the increase of the iron core product thickness and the effective use of the magnetic flux of the magnet, the output of the pump does not decrease so much although the current decreases due to the effect of the above item.

The effects of the above items will be described below with reference to specific examples. First, a pump having a flow rate rating of 80 L / min was prepared (a pump with an iron core overhang) in which the pole width of the quadrangular magnet 2 was set to 22 mm and an electromagnet section in which the gap size G was set to 1.5 mm was attached. The winding coil portion at this time is obtained by winding a coil having a coil wire diameter of 0.8 mm 535 times. Then, the iron core product thickness H is calculated by the above formula (1) when the overhang is 2 mm and the above formula (2).
1 mm (2 × 1.5 (1-1 / √2) = 0.87
Although there is a case with an overhang of ≈1), the above formula (1) is adopted here. Further, a pump provided with an electromagnet portion having the same core width as the pole width of the square magnets 2 facing each other was also prepared (iron core overhang-free pump). A voltage of 60 Hz was applied to the electromagnet of each pump, and current and power (input) were measured. The results are shown in Table 2. Similarly, impedance Z for the pump with iron core overhang and the pump without iron core overhang,
AC resistance R, reactance ωL and inductance L
Was calculated by the following calculation formula, and their comparison is also shown in Table 2. However, ω = 2πf, and power supply frequency f = 60H
z. Z = V / I R = W / I ² ωL = √ (Z ² −R ² ) L = ωL / ω

[0033]

[Table 2]

From Table 2, it can be seen that the inductance L of the winding coil portion in the large-diameter iron core is increased to 118.1%. Moreover, since the impedance Z is increased to 117.7% with respect to the increase (109%) of the iron core product thickness H,
It can be seen that the current is suppressed by that amount (3.05A
From 2.55A).

Also, in a normal three-dimensional electromagnet, since the equivalent void is larger than that of the conventional plane-opposed electromagnet, the permeance is small and unnecessary current easily flows.
Although the input tends to increase, electric power (input) can be suppressed by attaching an overhang to the iron core as in the present embodiment.

Next, the effect of the above item will be described.
There were prepared a pump having the same iron core as the above with a laminated thickness of 22 mm and an overhang of 0, and a pump with a laminated thickness of 24 mm and overhangs of 1 mm on the left and right and the same other specifications. The specifications of the vibrator are the same. The rated pressure is 15 KPa, and the winding coil portion at this time is a coil having a coil wire diameter of 0.8 mm.
It has been rolled 80 times. These pumps at 60Hz
Operated with. The results are shown in Table 3.

[0037]

[Table 3]

It can be seen from Table 3 that, despite the effect of suppressing the current, the flow rate does not decrease so much, and the pump efficiency increases as the input decreases. A slight increase in iron content (thickness) causes a decrease in input. However, depending on the design specifications of the pump electromagnet, the decrease in output may vary greatly, so the amount of overhang should be adjusted.

If the size of the core lamination H exceeds the size of the above equations (1) and (2), the leakage of magnetic flux increases rapidly and the output decreases more than necessary. H is determined in consideration of the stack thickness tolerance and the plate thickness. If the size is larger than this value, the magnetic flux of the magnet may leak through the iron core portion to reduce the thrust (output).

In the present embodiment, the electromagnet portion is composed of a large-diameter iron core (main iron core) 21 and a small-diameter iron core (auxiliary iron core) 22. However, as shown in FIGS. It can also be configured with.

Here, the electromagnet portion shown in FIG. 15 and FIG.
The flow rate rating with the electromagnet part shown in 7 is 20 L /
min pump A and pump B were prepared respectively. The applied voltage is 100 when the power supply frequency is 50 Hz.
Regarding the pump characteristic of the pump A and the power source frequency of 60 Hz when changing and controlling to V, 60V, 40V and 30V, the pump characteristic of the pump B when changing and controlling the applied voltage to 100V, 40V and 30V. Examined. The results are shown in FIGS.

From FIGS. 19 to 20, the pump B shown by a broken line
Shows stable control characteristics at both 50 Hz and 60 Hz, while the characteristics of pump A shown by the solid line are as shown in FIG.
When the voltage is 0 V or less, the thrust decreases, so the pressure decreases and control becomes impossible. In the case of 60 Hz, as shown in FIG.
It can be seen that control becomes impossible at 0 V or less. This is because the attractive force between the square magnet 2 and the large-diameter iron core 18 exceeds the electromagnetic force to show a thrust reduction phenomenon. If the small-diameter iron core is removed and the attractive force is weakened, the electromagnetic force is relatively increased. This is because it is possible to prevent a decrease in thrust and a decrease in thrust.

As shown in this embodiment, in the case of a pump that does not use a small-diameter iron core, the flow rate rating is 20 L / min.
If the pump has a small flow rate, the characteristics of the pressure and the flow rate do not deteriorate so much, and the controllability is improved. In this case, since the magnetic flux generated by the quadrangular magnet does not have a small-diameter iron core, the magnetic path is a space, so that the magnetic resistance increases and the magnetic flux density decreases. Therefore, the electromagnetic thrust may be reduced. Therefore, it is preferable to use a pump that does not use a small-diameter iron core when controlling to reduce the pressure and the flow rate. But,
Since the current increases, it is necessary to adjust the number of coil turns depending on the usage conditions. In the case of a pump having a large flow rate, this characteristic does not exist, and a large deterioration in characteristics is likely to occur.

It is the magnetic field effect of the air gap that increases the inductance of the electromagnet that overhangs the iron core, but in the present invention, the leakage magnetic flux at the side surface outer peripheral portion (coil end) of the winding coil portion is increased. , The inductance can be increased. For example, as shown in FIGS. 21 to 22, the ring 5 of a strip-shaped magnetic body that promotes leakage magnetic flux at the coil end of the winding coil portion 45 of the large-diameter iron core 18.
Wrap 1 As a material for the ring 51, it is preferable to use a grain-oriented silicon steel plate. Further, the number of rings 51 to be wound can be one for each winding coil portion 45, but in the present embodiment, it is two for each winding from both side surfaces. Further, notches 52 are formed on the side edges for easy winding, and cut-and-raised protrusions 53 and locking holes 54 for locking the rings are formed at both ends so as not to come off after winding. ing. As a result, the ring 51 is attached to the winding coil portion 4
When it is wound around both side surfaces of 5, the notch 52 is bent, and then the projection 53 and the locking hole 54 are hooked to each other, so that the detachment can be surely prevented.

Here, the iron core product thickness and the pole width of the square magnet are 2
The characteristics were examined for a pump (a pump with a ring) and a pump (a pump without a ring) in which an electromagnet part having a coil end and a ring wound around the coil end was incorporated.
The results are shown in Table 4.

[0046]

[Table 4]

From Table 4, as in the case of the pump incorporating the electromagnet portion shown in FIG. 15 (pump with iron core overhang), there is an effect of suppressing current. For this reason,
The ring pump can be adopted when it is necessary to suppress the current of the electromagnet.

In the above-mentioned embodiments, it is preferable to provide the pump casing 5 with a double structure for sound insulation. For example, as this double structure, a groove 6 formed in the pump casing 5 in the axial direction on the outer peripheral wall of the suction chamber 11, the discharge chamber 12 and a cavity described later is provided.
A double structure composed of an inner wall 6a and an outer wall 6b separated by 1 and / or a double structure composed of an inner lid 8a and an outer lid 8b provided on the side surface lid portion 8 can be provided. These double structures allow the vibration from the pump portion to be evacuated in the cavity of the groove 61 or the inner lid 8a and the outer lid 8b.
It has a high soundproofing property (sound insulation) that is mitigated by the air in the cavity.

In the pump casing 6, the suction chamber 11 and the discharge chamber 12 are formed in vertically symmetrical parts by partition walls which are substantially X-shaped when viewed from the side, and the partition walls are symmetrical in the horizontal direction by the partition walls. It is preferable that a cavity is formed in the portion and that a resonance type silencer for absorbing sound is provided.

The small-diameter iron core 19 is a stator core made of silicon steel plate in which side pole portions 19b arranged at both end portions of the outer yoke portion 19a and a center pole portion 19c arranged at the center are integrally machined in advance. Although it is manufactured by laminating a plurality of sheets, it can be manufactured by shaving.
Also, regarding the large-diameter iron core 18, the outer yoke portion 18
A laminate of a plurality of silicon steel sheet stator cores having side pole portions 18b processed at both end portions of a and a laminate of a plurality of silicon steel sheet stator cores having center pole portions 18c processed. Although they are integrated by press-fitting, they may be integrated by press-fitting after forming the outer yoke part and the center pole part by cutting them into a predetermined shape.

The fixing means for the lids 25 and 27 may be screwed, or may be screwed so that maintenance can be easily performed by adhesion or welding.
It is preferable to have a plug-in structure so that it can be attached with one touch. For example, as shown in FIG. 10, while forming the pins 71 on the inner surface of the lid 25, for example, the four corners,
An insertion hole 72 into which the four pins 71 of the lid 25 are inserted is formed in the tank portion 22 of the frame portion 21 at the time of molding.
The fitting dimension of the insertion hole 72 and the pin 71 is to fit. Then, for example, the tip end 73a of the extension portion 73 of the lid 25 has a tapered blade shape from the outer surface toward the inner surface. Further, the ridges 74 on the left and right pump casings 6 side
Is made low so that the extension portion 73 can be fitted therein. Also,
On the side surface of the pump casing 6, a lateral groove 75 is formed, which has a shape opposite to the shape of the tip of the extension portion 73 and presses the extension portion 73. The lateral groove 75 can be simultaneously formed by using a split mold or the like when the frame portion 21 is cut after being formed or when the frame portion 21 is formed.

In this embodiment, the electromagnetic vibration type diaphragm pump in which the disk-shaped diaphragm is connected to both ends of the vibrator has been described. However, the present invention is not limited to this, and the disk-shaped diaphragm is not limited to this. An electromagnetic vibrating diaphragm pump in which a diaphragm with corrugation for generating a pumping action is connected to the outside of the vibrator to form a pump, and pistons and pump casings provided at both ends of the vibrator are formed. Piston type electromagnetic vibration type pump consisting of a cylinder part,
Alternatively, the present invention can be applied to a piston type electromagnetic vibration type pump in which both ends of a vibrator of the piston type electromagnetic vibration type pump are supported by cross springs with corrugations.

Further, in the present embodiment, the frame portion is integrally formed with the 4-pole 2-coil type electromagnet portion incorporated in the iron core holder, but in the present invention, in addition to this, one ring-shaped member is formed. The frame part can be integrally formed with the electromagnet part composed of the iron core, the electromagnet part composed of one or a plurality of iron cores such as the two-pole two-coil type or the four-pole four-coil type and the winding coil part.

[0054]

As described above, according to the present invention,
It is small and can improve the operating characteristics and / or controllability of the pump.

Since a molded electromagnet is used, it is low in noise and excellent in safety (ignition, electric shock).

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an electromagnetic vibration pump of the present invention.

FIG. 2 is a perspective view showing an electromagnet portion in which an electromagnetic coil portion is omitted.

3 is a cross-sectional view of the vibrator of FIG.

FIG. 4 is a side view of the vibrator of FIG.

FIG. 5 is a side view showing another embodiment of the square magnet.

FIG. 6 is a side view showing still another embodiment of a square magnet.

7 is a cross-sectional view of the square magnet of FIG.

FIG. 8 is a diagram illustrating a magnetic flux distribution of a conventional magnet.

9A is a diagram illustrating the magnetic flux distribution of the quadrangular magnet of FIG. 4, FIG. 9B is a diagram illustrating the magnetic flux distribution of the quadrangular magnet of FIG. 5, and FIG. FIG. 7 is a diagram for explaining the magnetic flux distribution of the square magnet of FIG. 6.

FIG. 10 is a vertical cross-sectional view showing another embodiment of the electromagnetic vibration type pump of the present invention.

11 is a diagram illustrating a positional relationship between the large-diameter iron core in FIG. 10 and a square magnet in a vibrator.

FIG. 12 is a diagram for explaining the operation of the vibrator in which the pole portion of the iron core and the overlapping portion of the square magnet are different.

FIG. 13 is a diagram for explaining the operation of the vibrator in which the pole portion of the iron core and the overlapping portion of the square magnet are even.

FIG. 14 is a diagram illustrating an overhang of an iron core.

FIG. 15 is a front view of an electromagnet unit and an oscillator in which an iron core has an overhang.

16 is a side view of the electromagnet portion of FIG.

FIG. 17 is a front view of another electromagnet portion and a vibrator in which a small diameter iron core (auxiliary iron core) is omitted.

18 is a side view of the electromagnet portion of FIG.

FIG. 19 is a diagram showing pump characteristics at a power supply frequency of 50 Hz of the pump A having the electromagnet section shown in FIG. 15 and the pump B having the electromagnet section shown in FIG. 17;

20 is a diagram showing pump characteristics at a power supply frequency of 60 Hz of the pump A having the electromagnet section shown in FIG. 15 and the pump B having the electromagnet section shown in FIG.

FIG. 21 is a front view showing an electromagnet portion in which a ring is wound around a winding coil portion incorporated in a large-diameter iron core.

22 is a side view of the electromagnet portion of FIG. 21. FIG.

FIG. 23 is a plan view of a ring.

FIG. 24 is a side view of the ring.

FIG. 25 is a cross-sectional view showing a conventional vibrator.

26 is a front view of the vibrator of FIG. 25. FIG.

[Explanation of symbols]

1 Electromagnet part 2 square magnet 3 oscillators 4 diaphragm 5 Pump casing part 6 pump casing 7 packing 8 Side cover 8a 8b 18 large diameter iron core 19 small diameter iron core 20 Iron core holder 21 Frame part 30 screws 31 non-magnetic rod 32a, 40 Sintered metal magnet 32b magnetic material 41 laminate 41a thin core body

Continuation of the front page (56) Reference JP 2000-299971 (JP, A) JP 2000-130326 (JP, A) JP 58-56401 (JP, A) JP 63-77361 (JP, A) ) Japanese Patent Laid-Open No. 7-310668 (JP, A) Actual Development 57-109287 (JP, U) Japanese Patent Publication No. 4-35633 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 25/00-53/22

Claims (7)

(57) [Claims] 1. An electromagnet section composed of an iron core and a winding coil section, a vibrator supported in the electromagnet section and provided with square magnets, and a pump casing section fixed to both sides of the electromagnet section. An electromagnetic vibration pump, comprising: the rectangular magnet made of an anisotropic sintered metal magnet body , wherein the sintered metal magnet body comprises four sintered metal magnet bodies.
It consists of a stone and a tubular magnetic body with a square outer shape.
An electromagnetic vibration pump in which the sintered metal magnet is fixed to the outer peripheral portion of the body . Wherein said sintered metal electromagnetic vibrational pump according to claim 1, wherein the cross section of the magnet is trapezoidal or Kamabokogata. 3. The iron core comprises a pair of E-shaped large-diameter iron cores containing the winding coil portion and a pair of E-shaped small-diameter iron cores without windings, and the pair of large-diameter iron cores and the pair of large-diameter iron cores. The small-diameter iron core and the small-diameter iron core are arranged in a cross shape so as to form a square pole on the opening side, and the large-diameter iron core and the small-diameter iron core are composed of an outer yoke portion, a side pole portion, and a center pole portion, and the square magnet. the dimensions of the overlapping portions of the magnetic pole portion of the center pole portion is made larger than the dimension of the overlapping portions of the magnetic pole portion of the square-shaped magnet and the side pole portions claim 1
Electromagnetic vibration type pump or 2 described. Wherein one of the large径鉄center and small-diameter iron core, formed by the width dimension of at least the large径鉄center is larger than the width dimension of said rectangular-shaped magnet according to claim 3 Symbol placement of electromagnetic vibrational pump. Wherein said formed by ring magnetic body on a side surface outer periphery of the winding coil unit incorporated in a large径鉄heart is attached claim
The electromagnetic vibration pump according to 3 or 4. 6. The electromagnetic vibration pump according to claim 1, 2, 3, 4, or 5, wherein a frame portion made of resin is molded on the outer surface of the electromagnet portion. The inner peripheral portion of wherein said electromagnet unit, before said core
While positioning with respect to the square magnet of the oscillator,
7. The electromagnetic vibration type pump according to claim 6 , wherein an iron core holder for holding the iron core at the time of molding is incorporated before the frame portion is molded.