JP2006097626A - Electromagnetic vibration type diaphragm pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic vibration type diaphragm pump extending life of a diaphragm by reducing stress acting on the diaphragm in an irregular direction. <P>SOLUTION: This electromagnetic vibration type diaphragm pump 1 is provided with permanent magnet 5, 6, a pump main body including a moving element 7 reciprocated by magnetic force by electromagnets 2, 3 mutually attracting and repulsing in relation to magnetic force generated by the permanent magnets 5, 6, and diaphragms 8, 9 connected to both end parts of the moving element 7 and provided in compression chambers 14, 15. The moving element 7 of the diaphragm pump sucking and delivering air by reciprocating the moving element 7 corresponding to power source frequency and vibrating the diaphragms 8, 9 is supported by plate springs 24, 25. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electromagnetic vibration type diaphragm pump, and more specifically, mainly sucks and discharges air to an indoor air mat or air bed, supplies oxygen to a fish tank or domestic septic tank, or samples a test gas in pollution monitoring. The present invention relates to an electromagnetic vibration type diaphragm pump used for such as.

As an electromagnetic vibration type diaphragm pump that attracts and discharges fluid using vibration of a mover provided with a permanent magnet based on a magnetic interaction between an electromagnet and a permanent magnet, for example, FIG. 7A and FIG. There is a pump as shown in
The pump 50 includes an electromagnet portion 4 composed of electromagnets 2 and 3 arranged opposite to each other, a mover 7 having permanent magnets 5 and 6, and a diaphragm 8 connected to both ends of the mover 7. , 9, diaphragm bases 10, 11 and pump cases 12, 13 fixed to both ends of the electromagnet part 4, and a compression chamber 14 formed between the diaphragms 8, 9 and the pump cases 12, 13. , 15. The electromagnets 2 and 3 are completed by incorporating coil portions 18 and 19 wound around E-type iron cores 16 and 17, and the movable element 7 is formed between the iron cores 16 and 17. It is arrange | positioned in the space | gap part made.

In addition, two coils are arranged in a yoke with an E-shaped longitudinal section so that the same polarity is generated in adjacent parts, and a mover is inserted in the yoke so as to be capable of reciprocating in the axial direction. There is also known an electromagnetic vibration device in which the child is formed by attaching pole pieces to both ends of a permanent magnet magnetized in the axial direction and fixed to the shaft, and the mover is elastically supported by connecting a diaphragm to both ends of the shaft. ing. (See Patent Document 1).
JP 2002-112519 A

As shown in FIG. 7 for any of the configurations described above, the movable element 7 is elastically supported at both ends by the diaphragms 8 and 9 and is disposed in the gaps. Supports propulsive force and vibrator support force to support the vibrator.
For this reason, the mover 7 generates not only the axial stress due to the reciprocating thrust, but also the axial vertical stress due to the vibrator support, and the diaphragms 8 and 9 generate stress in an irregular direction. There is a problem that damage such as the above is likely to occur.

  The present invention provides an electromagnetic vibration type diaphragm pump capable of reducing the stress in an irregular direction applied to the diaphragm and extending the life of the diaphragm.

The present invention relates to the following.
(1) A pump body having a mover capable of reciprocating by a magnetic force between a permanent magnet and an electromagnet that attracts or repels the magnetic force generated from the permanent magnet, and a compression chamber coupled to both ends of the mover. In a diaphragm pump that sucks air by reciprocating the mover according to a power supply frequency and vibrating the diaphragm, and discharges the air, the mover is moved to a leaf spring. Electromagnetic vibration type diaphragm pump supported by.
(2) The electromagnetic vibration diaphragm pump according to (1), wherein the leaf spring supporting the mover is a laminate of a plurality of leaf springs.
(Function)

  Deformation other than in the axial direction during diaphragm vibration is suppressed by a leaf spring that supports the mover.

According to the electromagnetic vibration type diaphragm pump of the present invention, the leaf spring supporting the mover suppresses deformation other than the axial direction during diaphragm vibration, reduces the occurrence of breakage due to cracks and the like, and extends the life of the diaphragm. I can plan.
Moreover, the clearance gap between a needle | mover and an electromagnet can be made small, and the operating efficiency of a pump improves.

It is preferable that the leaf springs that support the mover are overlapped with each other so that the operation efficiency of the pump can be improved by changing the spring constant.
The thickness of the leaf spring is such that the thickness of one sheet is about 0.4 to 0.6 mm.

Hereinafter, embodiments of the electromagnetic vibration type diaphragm pump according to the present invention will be described in detail with reference to FIGS.
FIG. 1 shows an embodiment of an electromagnetic vibration type diaphragm pump according to the present invention. FIG. 1 (a) is a longitudinal sectional view, FIG. 1 (b) is a transverse sectional view, and FIGS. 2 to 5 are electromagnetic views shown in FIG. FIG. 6 is a front view showing an example of the shape of a leaf spring used in the vibration diaphragm pump, and FIG. 6 is a view showing the power factor for each frequency by changing the number of leaf springs used in the electromagnetic vibration diaphragm pump.
Standing up.

  1 (a) and 1 (b), an electromagnetic vibration type diaphragm pump 1 includes an electromagnet portion 4 and a ferrite magnet, a rare earth bond magnet inserted through a gap in the electromagnet portion 4 at a predetermined interval, or A mover 7 having permanent magnets 5 and 6 such as rare earth magnets, diaphragm bases 10 and 11 fixed to both ends of the electromagnet portion 4, and screws 20 with spacers 20 to 23 sandwiched between the electromagnet portions 4. The plate springs 24 and 25, the diaphragm bases 10 and 11, and the pump cases 12 and 13 are sandwiched and the diaphragms 8 and 9 are attached to both ends of the mover 7.

  The pump cases 12 and 13 have pump portions 30 and 31 including suction chambers 26 and 27, discharge chambers 28 and 29, and compression chambers 14 and 15, and the suction chambers 26 and 27 are compression chambers 14 and 15. In order to communicate with each other, there are valve seat portions 36 and 37 including suction ports 32 and 33 and check valves 34 and 35, and discharge chambers 28 and 29 are connected to the discharge ports 38 and 39 and check valves 40 and 41. The valve seat parts 42 and 43 which become are each provided.

  In the electromagnetic vibration type diaphragm pump 1 of this embodiment, the diaphragms 8 and 9 are linked to the vibration of the mover 7 based on the magnetic interaction between the electromagnet part 4 and the permanent magnets 5 and 6. , 31 generates a pressure and performs a pump action, so that external air sucked from the suction ports 32, 33 passes through the suction chambers 26, 27, and then passes through the compression chambers 14, 15 to the discharge chamber. 28, 29 and discharged from the discharge ports 38, 39.

Next, the shape of the leaf springs 24 and 25 that support the mover 7 in the electromagnetic vibration type diaphragm pump shown in FIGS. 1A and 1B will be described. As shown in FIG. Is made of steel and has an eight-letter shape. As shown in FIG. 1B, the upper end 44 and the lower end 45 of the leaf springs 24, 25 are between the electromagnet 4 and spacers 20-23. The center portions 46 of the leaf springs 24 and 25 are fixed by being sandwiched between the mover 7 and the nuts 47 and 48.
The shape of the leaf springs 24 and 25 is not limited to the shape shown in FIG. 2, but a single character shape that fixes two upper and lower points as shown in FIG. 3, and a cross shape that is a cross shape as shown in FIG. 5 may be a substantially disk shape as shown in FIG. 5, an appropriate shape can be selected according to the weight of the movable element 7, and a corrugated plate or the like can also be used.
The plate springs 24 and 25 may be fixed by a method of clamping the electromagnet portion 4 and the diaphragm case in addition to the above-described screwing with the spacer interposed therebetween.

Although the leaf springs 24 and 25 described above can reduce the gravity of the movable element 7 applied to the diaphragms 8 and 9, the spring constant can be further increased by using a leaf spring in which a plurality of leaf springs are overlapped. Change the reciprocating period and power frequency of the mover by adjusting the weight of the mover and the total spring constant of each of the leaf spring, air spring, and diaphragm based on the following natural frequency equation Can do.
f = (1 / 2π) × (√ (k / m))
f: resonance frequency
k: Spring constant
m: Weight of the mover

  FIG. 6 shows the power factor at each power frequency when the number of leaf springs is changed when the electromagnetic vibration diaphragm pump is operated at a discharge air volume of 80 L / min, a discharge pressure of 14.7 kPa, and a power supply voltage of 100 V. . As can be seen from this figure, since the spring constant is low when one leaf spring is used, the peak at the power frequency of 50 Hz occurs at the point where the power factor indicating that the driving efficiency is good. When the spring constant is high, the point where the power factor is high has a peak at the power supply frequency of 60 Hz.

Further, since the mover 7 is supported by the leaf springs 24 and 25 described above, the mover 7 does not move in the direction perpendicular to the axis. For this reason, the clearance gap between the needle | mover 7 and the electromagnets 2 and 3 can be made small, and the magnetic interaction of the permanent magnets 5 and 6 and the electromagnets 2 and 3 can be transmitted more efficiently.
The gap between the mover 7 and the electromagnets 2 and 3 is preferably 2.5 mm or less, more preferably 1 mm or less.

(A) is a longitudinal cross-sectional view of the electromagnetic vibration type diaphragm pump by the Example of this invention, (b) is a cross-sectional view. It is a front view which shows the Example of the shape of the leaf | plate spring used for the electromagnetic excitation type diaphragm pump of this invention. It is a front view which shows another Example of the shape of the leaf | plate spring used for the electromagnetic excitation type diaphragm pump of this invention. It is a front view which shows another Example of the shape of the leaf | plate spring used for the electromagnetic excitation type diaphragm pump of this invention. It is a front view which shows another Example of the shape of the leaf | plate spring used for the electromagnetic excitation type diaphragm pump of this invention. It is a figure which shows the power factor for each frequency by the number change of the leaf | plate spring used for the electromagnetic excitation type diaphragm pump of this invention. The electromagnetic vibration type diaphragm pump by a prior art example is shown, (a) is a longitudinal cross-sectional view, (b) is a cross-sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic vibration type diaphragm pump 2, 3 Electromagnet 4 Electromagnet part 5,6 Permanent magnet 7 Movable element 8,9 Diaphragm 10,11 Diaphragm base 12,13 Pump case 14,15 Compression chamber 16,17 Iron core 18,19 Coil part 20, 21, 22, 23 Spacer 24, 25 Leaf spring 26, 27 Suction chamber 28, 29 Discharge chamber 30, 31 Pump portion 32, 33 Suction port 34, 35 Check valve 36, 37 Valve seat 38, 39 Discharge port 40, 41 Check valve 42, 43 Valve seat portion 44 Upper end portion 45 Lower end portion 46 Center portion 47, 48 Nut 50 Electromagnetic vibration type diaphragm pump

Claims (2)

A pump body having a mover that can reciprocate by a magnetic force between a permanent magnet and an electromagnet that attracts or repels the magnetic force generated by the permanent magnet, and is connected to both ends of the mover and is provided in a compression chamber. A diaphragm pump for sucking air by reciprocating the mover according to a power supply frequency and vibrating the diaphragm, and discharging the air. The mover is supported by a leaf spring. Electromagnetic vibration type diaphragm pump. 2. The electromagnetic vibration type diaphragm pump according to claim 1, wherein the leaf spring supporting the movable element is a laminate of a plurality of leaf springs.

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