JP3131082U - Electromagnetic vibration type air pump - Google Patents

Abstract

An electromagnetic vibration type air pump provided with a balancer that achieves high pump performance with low power consumption and at the same time reduces the molding failure of a vibrator and the cost.
The vibrator includes a vibrator having an electromagnet and a permanent magnet, and both ends of the vibrator are connected to a pair of diaphragms held by sandwiching plates on both sides so as to face each other, and the diaphragm is a pump casing. The diaphragm is an electromagnetic vibration type diaphragm pump that reciprocates in a direction perpendicular to the opposing direction of the electromagnet as the polarity of the power supply of the electromagnet changes, and the holding plate on the pump casing side has a high specific gravity. A metallic balancer is joined.
[Selection] Figure 1

Description

  The present invention relates to an electromagnetic vibration type diaphragm pump. More specifically, the present invention relates to an electromagnetic vibration type air pump mainly used for aeration in domestic septic tanks, oxygen supplementation in fish tanks, air fountains in bubble baths, and pressurized air feeding in physics and chemistry equipment.

  The pump according to the prior art constitutes a core block by combining two E-type core blocks in which an excitation coil is inserted in the central part of a substantially E-type iron core whose central part is shorter than both leg parts. The two exciting coils inserted in the center are connected in parallel and connected to an AC power source.

  A gap (air gap) is formed in the center of the core block by an E-shaped core, and both ends of the core can be reciprocated with diaphragm rubber so that the mover is positioned horizontally in the center of the air gap. It is elastically supported by.

  Two permanent magnets are arranged on the mover so that the polarities of the two permanent magnets are opposite to each other at regular intervals, and the permanent magnets are symmetrical with respect to the central magnetic pole.

  Further, compression chambers are provided on both sides of the diaphragm, and an intake valve and a discharge valve are installed inside and outside the compression chamber, respectively.

  With this configuration, in the case of a positive half-wave with an AC power supply, when the N pole is excited on the upper part of the central magnetic pole of the E-type core and the S pole is excited on the lower part, the permanent magnet is attracted in the X direction. The mover is driven in the X direction as a whole.

  Next, in the negative half wave with an AC power supply, the central magnetic pole is excited to polarity, so that the permanent magnet receives reverse attractive force and repulsive force, and the mover is driven in the Y direction as a whole.

  As a result, the mover vibrates to the left and right in synchronism with the power supply frequency, and the air flow against the vibration of the diaphragms attached to both ends of the mover moves to the left compression chamber when the mover is driven to the left. The air is compressed, the suction valve is closed, the discharge valve is opened, and the air is discharged from the discharge pipe through the discharge chamber. At this time, the volume of the compression chamber on the right side expands to become negative pressure, so the discharge valve is closed, the intake valve is opened, and the air that has entered from the air intake port cools the core block, and the case side vent hole. It passes through the compression chamber side vent hole, passes through the suction valve opened through the suction chamber, and enters the compression chamber.

  Next, when the mover is driven to the right, the reverse phenomenon occurs in the left and right compression chambers. By repeating this phenomenon, the electromagnetic air pump can continuously supply air.

  The above-described conventional electromagnetic vibration type diaphragm pump 1 (see FIGS. 5 to 6) is arranged in opposed gaps between electromagnets as a method of tuning to the natural vibration frequency with respect to the power supply frequency, and is synchronized with the flat permanent magnet 3. A high-specific gravity metal powder or a metal balancer 5 is molded and attached to the center or end of the vibrator 4 by resin molding or the like.

  In the vibrator 4 having this structure, the weight (shape and thickness) of the balancer for tuning to the natural frequency corresponding to the power supply frequency is inevitably changed for each model, and accordingly, the molding die is inevitably changed. However, there is a problem that due to structural limitations, the weight of the balancer is limited, and defects such as cracks and defects due to inadequate process control of the molding temperature of the balancer and the resin occur, resulting in an increase in quality and work costs.

  Accordingly, the present invention provides an electromagnetic vibration type air pump having a balancer that solves such conventional problems, achieves high pump performance with low power consumption, and realizes reduction in defective molding and cost of the vibrator. It is intended.

  The electromagnetic vibration type diaphragm pump according to the first embodiment of the present invention includes a vibrator having an electromagnet and a permanent magnet. Both ends of the vibrator are connected to a pair of diaphragms whose both side surfaces are held by a holding plate so as to face each other. The diaphragm is mounted on a diaphragm holder and fixed with a pump casing. As the polarity of the power source of the electromagnet changes, the vibrator reciprocates in a direction perpendicular to the opposing direction of the electromagnet. A metal balancer having a high specific gravity is joined to the holding plate on the pump casing side by luking.

  An electromagnetic vibration type diaphragm pump according to a second embodiment of the present invention includes a structure in which the balancer has a female screw portion and a substantially D-shape for fastening, and the vibrator is fixed. Yes.

  In the electromagnetic vibration type diaphragm pump of the present invention, a mechanism for providing a balancer for tuning the power frequency used for the natural frequency of the vibration system enables high pump performance with low power consumption, as well as poor molding and cost of the vibrator. Reduction can be provided.

  The electromagnetic vibration type diaphragm pump according to the present invention will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is an explanatory plan view showing an electromagnetic diaphragm pump in which a balancer is provided in a vibration part according to an embodiment of the present invention, FIG. 2 is an explanatory plan view showing an embodiment of the balancer of the present invention, and FIG. Fig. 4 is a graph showing the comparison of the performance of air volume and back pressure between the device and the conventional balancer, and Fig. 4 is a graph showing the relationship between the balancer weight and the air volume at the natural frequency of the vibration system (that is, pump performance during tuning and when not synchronized). Is an explanatory graph).

  An electromagnetic vibration type diaphragm pump 1 (see FIG. 1) of the present invention includes an electromagnet 2 and a vibrator 4 having a permanent magnet 3.

  Both ends of the vibrator 4 are connected to a pair of diaphragms 7 held by sandwiching plates 6 so that both ends thereof are opposed to each other. The diaphragm 7 is fixed by a pump casing 9, and the power source of the electromagnet 2 is Accompanying the change in polarity, the vibrator 4 reciprocates in a direction perpendicular to the opposing direction of the electromagnet 2.

  It has a structure in which a high-specific gravity metallic balancer 5 is joined to the holding plate 6 on the pump casing 9 side. The high specific gravity metallic balancer 5 can also be made of powder metal.

  The balancer 5 of the present invention (see FIG. 2) has a female screw portion (functioning as a nut) a and a substantially D-shape b for fastening, and has a structure that is fixed to the vibrator 4.

The electromagnetic vibration type diaphragm pump 1 of the present invention has the maximum pump performance when the natural frequency fm of the vibration system is the tuning frequency f0 tuned to the power supply frequency f supplied to the electromagnet 2.
f0 = C√m / k
k: Spring constant due to diaphragm material, tension, etc. m: Weight of vibrator (4), holding plate (6), balancer (5), etc.

  Therefore, the present invention is provided with a balancer 5. FIG. 3 shows the relationship between the power source frequency and the balancer weight and the natural frequency fm of the vibration system. F0 is when tuning, f1 is when the balancer is heavy, and f2 is when the balancer is light.

  The shape of the balancer is not limited to that illustrated.

It is explanatory drawing which shows an example of the electromagnetic diaphragm pump of this invention. It is explanatory drawing which shows an example of the balancer of the electromagnetic diaphragm pump of this invention. It is the graph which compared the performance of the presence or absence of the balancer of this invention. It is a graph which shows the air quantity at the time of tuning at the natural frequency, and non-tuning. It is explanatory drawing which shows an example of the conventional electromagnetic diaphragm pump. It is explanatory drawing which shows the vibrator | oscillator part of the conventional electromagnetic diaphragm pump.

Explanation of symbols

1 Diaphragm pump 2 Electromagnetic part (electromagnet)
DESCRIPTION OF SYMBOLS 3 Permanent magnet 4 Vibrator 5 Balancer 6 Nipping plate 7 Diaphragm 8 Diaphragm holding part 9 Pump casing 10 Frame 11 Suction valve 12 Discharge valve a Screw b D cut part

Claims (2)

Comprising a vibrator having an electromagnet and a permanent magnet;
Both ends of the vibrator are connected to a pair of diaphragms held on both sides by sandwiching plates so as to face each other,
The diaphragm is fixed to the pump casing;
With the change in polarity of the power supply of the electromagnet, the vibrator is an electromagnetic vibration type diaphragm pump that reciprocates in a direction perpendicular to the opposing direction of the electromagnet,
An electromagnetic vibration type diaphragm pump, wherein a high-specific gravity metallic balancer is joined to the holding plate on the pump casing side. 2. The electromagnetic vibration type diaphragm pump according to claim 1, wherein the balancer includes a female screw portion and has a substantially D-shape for fastening, and has a structure in which the vibrator is fixed. .

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