JP2005273477A - Electromagnetic type diaphragm pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic type diaphragm pump which performs pump action by reciprocating two independent vibrators comprising two permanent magnets on a reverse phase, cancels generated oscillation out, and reduces the oscillation. <P>SOLUTION: A pair of electromagnets 3, 4 of which the iron cores 11, 12 are wrapped around by coils 13, 14 are arranged so that there is clearance G and magnetic poles are reverse to each other. Then the vibrator comprising the permanent magnet is arranged at the clearance G so that it can move freely, and both sides of the vibrator are fixed to the diaphragms 17, 18 of pump chambers 7, 8 arranged on both sides. Then the electromagnetic type diaphragm pump performs the pump action by reciprocating the vibrators by electromagnetic force of the electromagnet. The vibrators 5, 6 are two independent vibrators comprising two permanent magnets 17, 18, and each one end of the two vibrators is fixed to the diaphragm. Then each of the other ends is supported by guide rods 23, 24 arranged along the direction of the movement of the vibrators so that the each one end can move freely. The constitution of the two permanent magnets is that they are arranged by justifying the same magnetic poles facing the magnetic pole of the iron core, and that the two vibrators are reciprocated on the reverse phase. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electromagnetic diaphragm pump, and more particularly to an electromagnetic diaphragm pump with reduced vibration.

  The electromagnetic diaphragm pump uses a flexible diaphragm that does not cause friction on the metal surface as the compression method requires lubrication, so it is excellent as an oilless structure and discharges clean air pressure that does not contain oil. It has a function. FIG. 6 shows an example of a conventional electromagnetic diaphragm pump. The electromagnetic diaphragm pump 51 includes a pair of E-type (iron core) cores 53 and 53 ′ and coils 54 and 54 ′ that are arranged to face the frame 52 at a distance. The two permanent magnets 56 and 56 'are disposed in the gap between the pair of electromagnets 55 and 55' arranged with the magnetic poles facing each other and with a gap, as shown in the figure. When one permanent magnet 56 is an N-pole, the vibrator 57 is arranged so that the other permanent magnet 56 'becomes an S-pole and molded integrally with a resin member or the like. The front ends of shafts 58, 58 'provided on both left and right sides of 57 are fixed to the respective center positions of diaphragms 60, 60' provided in the left and right pump chambers 59, 59 '.

  The electromagnets 55 and 55 ′ generate an alternating magnetic field when an AC voltage is applied to the coils 54 and 54 ′, and repel and attract the permanent magnets 56 and 56 ′ in the same direction (same phase) as indicated by arrows, As a result, the vibrator 57 reciprocates in the direction of the arrow to drive the diaphragms 60 and 60 ′ to reduce and compress the gas in the pump chambers 59 and 59 ′ to perform the pumping action, and the intake ports 60a and 60′b. Then, outside air is sucked through the intake valves 61 and 61 ′, and the compressed air is discharged from the exhaust ports 60′a and 60′b through the exhaust valves 62 and 62 ′. The electromagnetic diaphragm pump 51 may be used in combination with a plurality of units, in addition to being used alone.

As a configuration in which a plurality of electromagnetic diaphragm pumps are used in series, a pair of pump bodies are individually housed in two inner cases, and the vibration direction (reciprocating motion) of each mover (vibrator) in the pair of pump bodies is the same. A diaphragm pump in which the two inner cases are connected by a connecting means in a state of being directed in the direction, and the vibration direction of each of the movers is in an opposite phase, so that the diaphragm pump is reduced in vibration and noise. It has been proposed (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 10-318152

  However, in the electromagnetic diaphragm pump having the conventional structure shown in FIG. 6, vibration is generated by the reciprocating motion of the vibrator 57 when the pump is used alone or when a plurality of pumps are used in series. When using for embedded devices, etc., it is necessary to use anti-vibration rubber for the purpose of suppressing the transmission of vibration to other devices, which not only requires time for assembly work but also increases the number of parts and costs. There is a problem.

  Further, in the configuration of the diaphragm pump disclosed in Patent Document 2, it is possible to reduce vibration by arranging an even number of pumps having the same capacity and characteristics on the vibration axis of the vibrator and operating them in the opposite phase. However, there is a problem that the installation space for two units is required, the pump is increased in size and the cost is increased. In addition, the pump alone cannot reduce the vibration, and it is necessary to use a pair (two units) of pumps having the same capacity and characteristics at the same time. Therefore, the pump capacity is unnecessarily increased. There is also a problem.

  The present invention has been made in view of the above points, and reduces vibration by canceling vibrations generated by reciprocating two independent vibrators composed of two permanent magnets in opposite phases to perform pumping action. An object of the present invention is to provide an electromagnetic diaphragm pump.

  In order to achieve the above object, according to the first aspect of the present invention, a pair of electromagnets in which a coil is wound around an iron core is disposed with a gap and a magnetic pole facing each other, and a vibrator comprising a permanent magnet in the gap. In the electromagnetic diaphragm pump in which both sides of the vibrator are fixed to the diaphragms of the pump chambers provided on both sides, and the vibrator is reciprocated by the electromagnetic force of the electromagnet to perform the pumping action, The vibrators are two independent vibrators composed of two permanent magnets, each one end of the two vibrators is fixed to the diaphragm, and the other end is arranged along the moving direction of the vibrator. The two permanent magnets are arranged so as to be movable by a rod, and the same magnetic poles are arranged toward the magnetic poles of the iron core.

When an alternating voltage is applied to the coil of the electromagnet, an alternating magnetic field is generated. The alternating magnetic field causes the two vibrators composed of permanent magnets to reciprocate in opposite phases, and the diaphragm is driven by this operation to perform a pumping action. The two vibrators cancel vibrations generated by reciprocating motion in opposite phases, and vibrations of the entire pump are reduced.
According to a second aspect of the present invention, a reciprocating motion is adjusted by contracting a spring between the two vibrators.

  The strokes and the like in the reciprocating motion of the two vibrators are adjusted by the spring force of a spring that is contracted between the vibrators. This makes it possible to adjust the pump discharge amount and the like.

According to the first aspect of the present invention, vibration generated from the pump can be greatly suppressed, and it can be attached to equipment without using a vibration-proof rubber or the like, thereby improving the assemblability. In addition, since vibration can be suppressed by a single pump, the installation space can be reduced and costs can be reduced.
According to the invention of claim 2, it becomes possible to adjust the discharge amount of the pump by adjusting the spring force of the spring to be contracted, and the versatility of the air pump can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a front view of an electromagnetic diaphragm pump according to the present invention, FIG. 2 is a cross-sectional view in the direction of arrow II-II in FIG. 1, and FIG. 3 is a cross-sectional view in the direction of arrow III-III in FIG. As shown in FIGS. 1 to 3, the electromagnetic diaphragm pump 1 includes a pair of electromagnets 3 and 4 that are arranged opposite to each other with a gap G in the frame 2, and the electromagnets 3 and 4 in the gap G. It consists of two independent vibrators 5 and 6 arranged so as to be movable along the magnetic poles, and pump chambers 7 and 8 provided on the left and right sides of the frame 2.

The electromagnets 3 and 4 are formed by winding coils 13 and 14 around a pair of E-type cores 11 and 12 as iron cores, and the magnetic poles are arranged horizontally and facing each other with the gap G therebetween. ing. The diaphragms 15 and 16 constituting the pump chambers 7 and 8 have a disk shape and their peripheral portions are airtightly fixed to the pump chambers 7 and 8, respectively.
The two vibrators 5 and 6 are formed by molding permanent magnets 17 and 18 having the same shape of a rectangular parallelepiped with non-magnetic members such as resin members 19 and 20 and facing the center positions of the diaphragms 15 and 16. Shafts 21 and 22 are provided horizontally at the center position of the surface to be moved. Further, as shown in FIG. 2, the vibrators 5 and 6 have support portions 5a, 5b, 6a and 6b projecting from upper and lower ends opposite to the shafts 21 and 22, respectively, and guide holes 5c, 5d, 6c and 6d. Is provided.

  As shown in FIG. 2, guide rods 23 and 24 are arranged in parallel (horizontal) along the longitudinal direction (left and right direction) at positions just above and below the gap G between the magnetic poles of the E-type cores 11 and 12 facing each other. Each end is fixed to the frame 2. The vibrators 5 and 6 have guide rods 23 and 24 inserted through upper and lower guide holes 5c, 5c, 6d, and 6d, and are slidably supported. 16 is fixed at the center position. As shown in FIG. 3, the permanent magnets 17 and 18 of the two vibrators 5 and 6 face each other with the same magnetic poles N, N and S, S facing the magnetic poles of the opposing E-type cores 11 and 12. Are arranged. Thereby, the permanent magnets 17 and 18 can reciprocate in opposite directions, that is, reciprocate in opposite phases. In this way, the two vibrators 6 and 7 are configured to reciprocate in opposite phases.

  The vibrators 6 and 7 are slidable along the guide rods 23 and 24 with a slight gap between the opposing magnetic poles of the E-type cores 11 and 12 in the gap G. In this way, the two vibrators 6 and 7 are supported by the diaphragms 15 and 16 at the center position on one side by the shafts 21 and 22, and the upper and lower ends on the other side by the guide rods 23 and 24. The gap G between the cores 11 and 12 can be moved in the horizontal direction in the drawing in parallel and independently along the magnetic pole.

  As shown in FIG. 3, the pump chamber 7 is provided with an intake port 7a and an exhaust port 7b, and communicates with each other through small holes 7c and 7d. An intake valve 25 is provided in the small hole 7c, and an exhaust valve 26 is provided in the small hole 7d. Similarly, the pump chamber 8 is also provided with an intake port 8a and an exhaust port 8b, which communicate with each other through small holes 8c and 8d. An intake valve 27 is provided in the small hole 8c, and an exhaust valve 28 is provided in the small hole 8d. It has been. In this way, the electromagnetic diaphragm pump 1 is configured.

The operation will be described below.
When the electromagnetic diaphragm pump 1 is not excited by the coils 13 and 14 of the electromagnets 3 and 4, the diaphragms 15 and 16 are in a flat state as shown in FIGS. positioned. The electromagnets 3 and 4 generate an alternating magnetic field in response to an AC voltage applied to the coils 13 and 14, and the left and right vibrators 5 and 6 composed of the permanent magnets 17 and 18 are shown in FIG. As shown by B, B, and A, the left and right diaphragms 15 and 16 are driven symmetrically by reciprocating in opposite phases to perform pumping action, and the gas in the pump chambers 7 and 8 is decompressed and compressed, and the intake air Outside air is sucked from the ports 7a and 8a through the intake valves 25 and 27, and compressed air is discharged from the exhaust ports 7b and 8b through the exhaust valves 26 and 28.

Since the two vibrators 5 and 6 reciprocate in opposite phases, the vibrations generated by the reciprocation cancel each other, and the vibration is greatly reduced (about 1/5 to 1/100) when viewed as a whole pump. Is done. Thereby, it becomes possible to incorporate the electromagnetic diaphragm pump 1 into a device or the like without using an anti-vibration rubber.
4 and 5 show a second embodiment of the electromagnetic diaphragm pump according to the present invention, and FIG. 5 is a cross-sectional view in the direction of arrow VV in FIG. 4 and 5, the same members and corresponding members as those in FIGS. 2 and 3 are denoted by the same reference numerals and corresponding reference numerals, and description thereof is omitted.

  As shown in FIGS. 4 and 5, in the electromagnetic diaphragm pump 1 ′, the guide rods 33, 34 are in the longitudinal direction (left-right direction) at positions just above and below the gap G between the magnetic poles of the E-type cores 11, 12. The both ends are fixed to the frame 2. The two vibrators 5 and 6 are supported by the guide rods 33 and 34 so that the locking portions 5a, 5b, 6a and 6b are slidable. The guide rods 33, 34 are provided with spring seats 33 a, 34 a at the center positions, and springs 35, 36, 37, 38 between the support portions 5 a, 6 a, 5 b, 6 b facing the vibrators 5, 6. Is shrunk.

  And the vibrators 5 and 6 can adjust the stroke of reciprocating motion by adjusting the spring force of these springs 35-38. Thereby, it becomes possible to adjust the discharge amount of a pump, and the versatility of an air pump improves.

1 is a side view of a first embodiment of an electromagnetic diaphragm pump according to the present invention. It is arrow II-II direction sectional drawing of FIG. It is arrow III-III direction sectional drawing of FIG. It is sectional drawing of 2nd Embodiment of the electromagnetic diaphragm pump which concerns on this invention. FIG. 5 is a cross-sectional view in the direction of arrow VV in FIG. 4. It is sectional drawing of the conventional electromagnetic diaphragm pump.

Explanation of symbols

1, 1 'Electromagnetic diaphragm pump 2 Frame 3, 4 Electromagnet 5, 6 Vibrator 7, 8 Pump chamber 11, 12 E type core (iron core)
13, 14 Coil 15, 16 Diaphragm 17, 18 Permanent magnet 23, 24 33, 34 Guide rod 35-38 Spring

Claims (2)

A pair of electromagnets in which a coil is wound around an iron core is arranged with a gap and a magnetic pole facing each other. In the electromagnetic diaphragm pump that is fixed to the diaphragm of the pump chamber and performs the pumping action by reciprocating the vibrator by the electromagnetic force of the electromagnet,
The vibrators are two independent vibrators composed of two permanent magnets, one end of each of the two vibrators is fixed to the diaphragm, and the other end is disposed along the moving direction of the vibrator. An electromagnetic diaphragm pump characterized in that it is supported by a guide rod so as to be movable, and the two permanent magnets are arranged with the same magnetic poles aligned toward the magnetic poles of the iron core.   2. The electromagnetic diaphragm pump according to claim 1, wherein a reciprocating motion is adjusted by retracting a spring between the two vibrators.

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