JP4850756B2 - Electromagnetic vibration type diaphragm pump - Google Patents

Description

  The present invention relates to an electromagnetic vibration type diaphragm pump. More specifically, by passing an AC power supply to the electromagnet, the vibrator disposed opposite to the electromagnet with a gap is reciprocally vibrated at the same frequency as the AC power supply so as to face both ends of the vibrator. The present invention relates to an electromagnetic vibration type diaphragm pump that sucks and exhausts compressed gas by a volume change of a pair of arranged diaphragms and a pump casing partitioned by the diaphragm and the action of a valve. It is used for replenishment, bubble bath air blow, and small compressors for industrial equipment.

  Conventionally, for example, an electromagnetic vibration type air pump has been used as an example of a pump for supplementing oxygen for fish farming.

  In such an air pump (see FIG. 5), as disclosed in Patent Document 1, a pair of permanent magnets and a drive lever (vibrator) are arranged opposite to an electromagnet, and are approximately at the center in the longitudinal direction of the drive lever. It is joined to a diaphragm (corrugation type) and the tip of the drive lever is fixed to the case. The drive lever reciprocates by the AC power supply of the electromagnet, and the compressed gas is absorbed by the volume change of the pump casing and the action of the valve. It is a structure to exhaust.

JP 2000-342106 A

  In such a conventional air pump (see FIG. 5), the direction of the arrow shown in FIG. 5 is based on the permanent magnet side of the drive lever as the force point, the junction of the diaphragm as the action point, and the tip portion attached to the case of the drive lever The pump action is achieved with the amplitude of reciprocating vibration. For this reason, even if the force point of the permanent magnet portion facing the electromagnet has a large amplitude, the amplitude of the diaphragm portion disposed at the operating point is small, and small air pumps for ornamental fish have become mainstream. Even if a large magnetic load is used to obtain high performance and high pressure, and even if a high-magnetism rare earth magnet is used, the drive levers come into contact with each other, causing problems such as abnormal noise, missing permanent magnets, and diaphragm life. This was a technical drawback for the realization of high pressure and high air volume air pumps.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic vibration type diaphragm pump that solves the above-mentioned conventional problems, can maintain a long-life, high-performance stable pump function, and can reduce costs.

  An electromagnetic vibration type diaphragm pump according to the present invention includes an electromagnet, a vibrator having a permanent magnet, and both ends of the vibrator, and a pair of diaphragms held on both sides by sandwiching plates so as to face each other. The vibrator is connected to the pair of diaphragms, and the electromagnet and the vibrator are mounted on a frame via a diaphragm base so that the electromagnet and the vibrator are spaced apart from each other by a predetermined gap distance. An electromagnetic vibration type diaphragm pump that reciprocates in the longitudinal direction of the axis of a vibrator opposed to an electromagnet in accordance with a change in polarity of an AC voltage, gripping an elastic body and one end of the elastic body, and One or more vibrator holders comprising a fixing portion for fixing the elastic body and a connecting portion for holding the other end of the elastic body and connecting the elastic body to the vibrator The one or more vibrator holders are slidably mounted on the frame via the fixed part and connected to the vibrator via the connecting part, and the vibrator The frame is arranged so as to form an angle that is substantially perpendicular to the trajectory of the substantially arc-shaped motion of the vibrator accompanying the pendulum-like reciprocating motion around the fixed portion of the elastic body of the cage. It is characterized by.

  According to the electromagnetic vibration type diaphragm pump of the present invention, the point of action and the point of action have the same point on the vibrator and the diaphragm, and the tip of the vibration holder fixed to the vibrator serves as a fulcrum, and the vibration holder of the elastic body However, it can withstand the amplitude and stress of reciprocating motion while ensuring the necessary length. According to the SN data, the life of the metal elastic body is sufficient when the number of reciprocating vibrations is 10 7 or more. In addition, since the plane of the diaphragm facing the longitudinal direction of the vibrator is substantially perpendicular, it is possible to realize a structure that can maintain life and stable pump performance without causing wrinkles or sagging in the diaphragm during reciprocating motion. .

  Further, according to the present invention, the opposed surface of the electromagnet core and the vibrator each have a curved shape, and the electromagnet and the vibrator are evenly moved when the vibrator moves in a substantially arcuate shape. A structure in which the air gap distance is maintained can be realized. For this reason, because the surface of the diaphragm and the holding plate reciprocate at a substantially right angle with respect to the radius of curvature of the vibrator cage, stabilization of the gap between the electromagnet and the vibrator and the opposed face of the vibrator and the vibrator Diaphragm twisting, sagging, wrinkles, etc. can increase the life and cost of the diaphragm and stabilize the pump performance.

  Further, according to the present invention, the vibrator holder and the fixing portion of the vibrator holder are sandwiched and fixed from both sides by a soft damper (for example, synthetic rubber) to hold the vibrator due to fatigue deterioration. The breakage of the vessel can be prevented.

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

  Referring to FIG. 1, an electromagnetic vibration type diaphragm pump 1 according to an embodiment of the present invention includes a vibrator 4 having an electromagnet 2 and a permanent magnet 3, and both side surfaces so that both ends of the vibrator 4 face each other. Is connected to a pair of diaphragms 6 and 6 'held by a sandwiching plate 5 composed of two sandwiching plates 51 and 52, and the electromagnet 2 and the vibrator 4 can move between the vibrator 4 The vibrator 4 is disposed at a distance g and is attached to the diaphragm base 7. The vibrator 4 is perpendicular to the axial length direction of the vibrator 4 facing the electromagnet 2 as the polarity of the power supply voltage of the electromagnet changes. Reciprocate. In the present embodiment, the vibrator 4 is a movable arm having a rod shape. One holding plate 51 is supported by the movable arm 4 and the other holding plate 52 is pressed against the one holding plate 51 via a diaphragm by a fastening means such as a nut. In the embodiment shown in FIG. 1, since the permanent magnet 3 is provided so as to protrude from the vibrator 4, the gap distance g is a gap distance between the permanent magnet 3 and the electromagnet. However, the arrangement is not limited to this. It is also possible to embed the permanent magnet 3 in the movable arm 4 having a rod shape. Further, the gap distance g is not limited to a specific distance. The material of the permanent magnet 3 employed in the electromagnetic vibration type diaphragm pump 1 of the present invention is not limited to a specific one. For example, a ferrite magnet, a rare earth magnet, a neodymium / iron / boron magnet, etc. Rare earth / iron / boron magnets can be used. The gap distance g can also be arbitrarily changed by selecting the material of the permanent magnet 3.

  The movable arm 4 has an elastomeric member such as rubber sandwiched by a screw S between a pair of holding hardware H joined to the movable arm 4 by welding or screwing as shown in FIG. 3d. One end of an elastic body (a metal leaf spring or the like is preferably employed) is held via a damper 12 composed of D, and the other end of the vibrator holding part 10 is held by a vibrator. The fixed portion 11 is held via the damper 12 described above.

  As shown in FIG. 1, the movable arm 4 and the vibrator holding unit 10 are provided with diaphragms 6 and 6 attached to the frame 9 and the vibration axis direction of the movable arm 4 via the vibrator holding and fixing unit 11. The vertical plane of “′” is disposed on the frame 9 so as to have a substantially square shape with a predetermined angle with respect to the radius of curvature of the vibrator holding portion.

  Further, as shown in FIG. 3a, the electromagnetic part can be curved, and as shown in FIG. 3b, the opposing planes of the core C of the electromagnet 2, the movable arm 4 and the roof-shaped permanent magnet 3 are both curved. It is also possible to keep the uniform gap g constant at the time of vibration driving and to prevent the movable arm 4 from being biased. In this case, as shown in the figure, the movable arm 4 and the vibrator are held. The portion 10 can be disposed on the frame 9 in a substantially Y shape via the vibrator holding and fixing portion 11.

  Further, as a modification of the present embodiment, the electromagnetic vibration diaphragm pump 1 can have a substantially trapezoidal cross section of the diaphragm base 7.

  Further, the shape of the vibrator holding / fixing portion 11 is not limited to a flat plate shape as illustrated, and may be a round line shape (round bar shape).

It is a structure top view which shows an example of the electromagnetic diaphragm pump of this invention. It is a principal part enlarged view of the electromagnetic diaphragm pump of FIG. It is a structure top view which shows an example of the curved shape of the electromagnetic part of the electromagnetic diaphragm pump of this invention. It is a structure top view which shows the other example of the curved shape of the electromagnetic part of the electromagnetic diaphragm pump of this invention. It is a principal part enlarged view of the electromagnetic diaphragm pump of FIG. 3b. It is explanatory drawing which shows the modification of the electromagnetic diaphragm pump of FIG. 3b. It is the sectional view on the AA line of the electromagnetic diaphragm pump of FIG. 3d. It is plane explanatory drawing which shows an example of the stress amplitude and the repetition frequency fatigue SN curve of an elastic body. It is explanatory drawing which shows an example of the conventional electromagnetic diaphragm pump.

Explanation of symbols

1 Diaphragm pump 2 Electromagnetic part (electromagnet)
3 Permanent magnet 4 Vibrator (movable arm)
5 Clamping plate (center plate)
6 Diaphragm 7 Diaphragm base 8 Pump casing 9 Frame 10 Vibrator cage 11 Vibrator holding fixture 12 Damper 13 Suction valve 14 Discharge valve

Claims (6)

An electromagnet,
A vibrator provided with a permanent magnet;
Both ends of the vibrator, and a pair of diaphragms held on both sides by sandwiching plates so as to face each other,
The vibrator is coupled to the pair of diaphragms;
The electromagnet and the vibrator are attached to the frame via a diaphragm base so that the vibrator is disposed by a gap distance that allows the vibrator to move,
The vibrator is an electromagnetic vibration type diaphragm pump that reciprocates in the longitudinal direction of the axis of the vibrator facing the electromagnet with a change in polarity of the alternating voltage of the electromagnet,
An elastic body, one end of the elastic body, a fixing portion for fixing the elastic body to the frame, the other end of the elastic body, and the elastic body coupled to the vibrator One or more vibrator holders comprising a connecting portion for
The one or more vibrator holders are swingably attached to the frame via the fixed part, and connected to the vibrator via the connecting part,
The frame is arranged so as to form an angle that is substantially perpendicular to the trajectory of the substantially arc-shaped motion of the vibrator associated with the pendulum-like reciprocating motion around the fixed portion of the elastic body of the vibrator holder. An electromagnetic vibration type diaphragm pump characterized by comprising The opposed surfaces of the electromagnet core and the vibrator have curved shapes, respectively, and a uniform gap distance is maintained between the electromagnet and the vibrator during the movement of the vibrator in a substantially arc shape. The electromagnetic vibration type diaphragm pump according to 1. Two or more of the vibrator holders are disposed, and one end of the two or more vibrator holders is gripped in a single fixing portion without being substantially separated, 3. The electromagnetic vibration type diaphragm pump according to claim 1, wherein the other end of the vibrator holder is connected via two or more corresponding connecting portions spaced apart from each other. The electromagnetic vibration type diaphragm pump according to any one of claims 1 to 3, wherein the holding portions at both ends of the elastic body are joined in a sandwich shape from both sides by a soft damper. The said vibrator | oscillator is a movable arm, and the said permanent magnet is provided so that it may protrude from the said movable arm so that the said electromagnet may be opposed in the non-driving state of a vibrator | oscillator. 2. An electromagnetic vibration type diaphragm pump according to item 1. 5. The vibrator according to claim 1, wherein the vibrator is a movable arm, and the permanent magnet is provided so as not to protrude from the movable arm so as to face the electromagnet when the vibrator is not driven. 2. The electromagnetic vibration type diaphragm pump according to claim 1.

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