JP2014147248A - Diaphragm electromagnetic reciprocation fluid device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contact between a reciprocation member and a stator core by reducing force of attracting the reciprocation member to a stator side.SOLUTION: A diaphragm electromagnetic reciprocation fluid device 100 includes a reciprocation member 120 connected to a diaphragm 110 and a drive part reciprocally driving the reciprocation member 120, and makes the diaphragm 110 fluctuate with the reciprocation of the reciprocation member 120 to suck and discharge fluid. The drive part includes first and second E-type cores 132a, 132b which have central magnetic pole parts 134 and first and second side part magnetic pole parts 136 and 138. The reciprocation member 120 includes first and second permanent magnets 140a, 140b. The width between an N pole surface and an S pole surface at the position where each of the permanent magnets 140a, 140b comes close to the side part magnetic pole parts 136, 138 is smaller than the width between the N pole surface and the S pole surface at the position where each of the permanent magnets 140a, 140b comes close to the central magnetic pole parts 134.

Description

  The present invention relates to a diaphragm type electromagnetic reciprocating motion such as a pump or a compressor in which a diaphragm is changed by reciprocating a reciprocating member by generating a magnetic field intermittently or alternately in a stator core to suck and exhaust a fluid. The present invention relates to a fluid device.

  A diaphragm-type electromagnetic reciprocating fluid device includes a reciprocating member having a magnetic member made of a ferromagnetic material such as iron or a permanent magnet such as a ferrite magnet, and both ends of which are connected to the diaphragm, and the reciprocating member of the reciprocating member. And a stator core having a magnetic pole surface that acts magnetically on the magnetic member. A solenoid coil is wound around the stator core, and intermittent or alternating magnetic flux is generated between the magnetic pole faces by causing current to flow intermittently or alternately in the solenoid coil. The magnetic member is attracted and repelled by the magnetic flux and is moved so as to be drawn between the magnetic pole faces or separated from the magnetic pole faces. As a result, the reciprocating member including the magnetic member is reciprocated along the linear path, and the diaphragm connected to the reciprocating member is periodically changed, whereby the fluid is repeatedly sucked and exhausted. Is conveyed (Patent Document 1).

  In general, the magnitude of the magnetic force received by the magnetic member is inversely proportional to the square of the distance from the magnetic pole surface. Therefore, the force received by the magnetic member from the magnetic flux generated by the stator core is increased to efficiently drive the electromagnetic reciprocating fluid device. In order to achieve this, the distance between the magnetic pole surface of the stator core and the magnetic member should be as small as possible. However, since the force that the magnetic member receives from the magnetic flux includes not only the direction of the linear path of the reciprocating member but also the component that is attracted to the stator core side, the distance between the magnetic pole surface of the stator core and the magnetic member is reduced. If it is too large, the reciprocating member may be attracted to the stator core and come into contact. Particularly in the case of a diaphragm type electromagnetic reciprocating device, since the reciprocating member is supported by a flexible diaphragm, the reciprocating member is attracted by the force attracted to the stator core side received by the magnetic member, so that the reciprocating member is reciprocated. The moving member and the stator core are easy to contact. Further, if the rigidity of the diaphragm is increased in order to prevent such contact, the movement in the direction of the linear path is also restricted, and the efficiency of the electromagnetic reciprocating fluid device is conversely reduced.

JP 2001-132647 A

  Accordingly, an object of the present invention is to provide a diaphragm type electromagnetic reciprocating fluid device in which the force with which the reciprocating member is attracted toward the stator core is reduced to prevent contact between the reciprocating member and the stator core. To do.

That is, the present invention
A reciprocating member connected to the diaphragm; and a drive unit that drives the reciprocating member to reciprocate along a linear path. The diaphragm is changed by the reciprocating motion of the reciprocating member to suck and exhaust the fluid. A diaphragm-type electromagnetic reciprocating fluid device adapted to
The driving unit includes a first magnetic pole part and a first magnetic pole part having a central magnetic pole part and first and second side magnetic pole parts arranged on both sides of the central magnetic pole part with a gap in the direction of the linear path. The E-type core is set so that the central magnetic pole portions, the first side magnetic pole portions, and the second side magnetic pole portions face each other on both sides of the linear path. First and second E-type cores, and a solenoid coil wound around at least one of the first and second E-type cores;
The reciprocating member includes the central magnetic pole portion of the first and second E type cores in the direction of the linear path in a state where the first and second E type cores are not excited by the solenoid coil. And a first permanent magnet located between the first side magnetic pole part and a second permanent magnet located between the central magnetic pole part and the second side magnetic pole part. ,
The first permanent magnet is arranged such that the N pole face faces the first E-type core and the S pole face faces the second E-type core, and the second permanent magnet is the S pole face. Is arranged so that it faces the first E-type core and the N pole face faces the second E-type core,
The first permanent magnet has the N pole at a position closer to the first side magnetic pole part than a width between the N pole face and the S pole face at a position close to the central magnetic pole part. The width between the face and the S pole face is reduced,
The second permanent magnet has the N pole at a position closer to the second side magnetic pole part than the width between the N pole face and the S pole face at a position close to the central magnetic pole part. Provided is a diaphragm electromagnetic reciprocating fluid device in which the width between the surface and the S pole surface is smaller.

  In the course of research and development, the inventor of the present application has a greater influence on the force in the direction in which the reciprocating member is attracted to the E-type core than the force that the permanent magnet receives from the side magnetic pole part than the force that the permanent magnet receives from the central magnetic pole part. I found The present invention has been made based on this discovery, and in this diaphragm type electromagnetic reciprocating fluid device, between the N pole surface and the S pole surface of the permanent magnet facing the first and second E type cores. Since the width is made smaller on the side magnetic pole part side than on the central magnetic pole part side and the distance between the permanent magnet and the first or second side magnetic pole part is made larger, the first and second The force received from the second side magnetic pole portion becomes relatively small, and the force in the direction in which the reciprocating member is drawn toward the E-type core can be reduced. As a result, the rigidity of the diaphragm supporting the reciprocating member can be reduced to reduce the loss of force when the reciprocating member reciprocates, or the distance between the central magnetic pole portion and the permanent magnet can be reduced. Since a larger thrust can be obtained, the device can be driven with higher efficiency.

Specifically, the first permanent magnet includes a wide portion located on the side of the central magnetic pole portion and a narrow width located on the side of the first side magnetic pole portion and narrower than the wide portion. And having a part
The second permanent magnet has a wide portion located on the side of the central magnetic pole portion and a narrow portion located on the side of the second side magnetic pole portion and having a width narrower than the wide portion. Can be.

Alternatively, the N pole face and the S pole face of the first permanent magnet are inclined with respect to the direction of the linear path, and the width between the N pole face and the S pole face is equal to the central magnetic pole. Continuously from the position close to the part to the position close to the first side magnetic pole part,
The N pole face and the S pole face of the second permanent magnet are inclined with respect to the direction of the linear path, and the width between the N pole face and the S pole face is at the central magnetic pole portion. It is also possible to continuously reduce the position from the close position to the position close to the second side magnetic pole portion.

It is sectional drawing of the diaphragm type electromagnetic reciprocating fluid apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing of the diaphragm type electromagnetic reciprocating fluid apparatus which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the diaphragm type electromagnetic reciprocating fluid apparatus which concerns on the 3rd Embodiment of this invention.

  As shown in FIG. 1, the diaphragm type electromagnetic reciprocating fluid device 100 according to the first embodiment of the present invention is reciprocated along a linear path with first and second diaphragms 110a and 110b fixed at both ends. A reciprocating member 120 that moves, a stator core 130 that includes first and second E-shaped cores 132a and 132b that are disposed on both sides of a linear path of the reciprocating member 120, and the stator core 130. Are provided with first and second solenoid coils 133a and 133b for generating magnetic flux. The first and second E-shaped cores 132a and 132b are respectively provided with central magnetic pole portions 134a and 134b and first and second side portions arranged on both sides of the central magnetic pole portions 134a and 134b with an interval in the direction of a linear path. Magnetic pole portions 136a, 136b, 138a, 138b, and central magnetic pole surfaces 135a, 135b at the tips of the central magnetic pole portions 134a, 134b of the E-type cores 132a, 132b, and first side magnetic pole portions 136a, 136b. The first side magnetic pole surfaces 137a and 137b at the front end and the second side magnetic pole surfaces 139a and 139b at the front end of the second side magnetic pole portions 138a and 138b are opposed to each other with the reciprocating member 120 therebetween. Is arranged. The first and second solenoid coils 133a and 133b installed in the respective central magnetic pole portions 134a and 134b are connected to the first and second E-type cores 132a and 132b when a current is applied to the solenoid coils 133a and 133b. The magnetic pole surfaces facing each other are wound so as to have different polarities. The first and second diaphragms 110a and 110b form first and second pump chambers 104a and 104b, respectively, between the head cover 102 and the first and second diaphragms 110a and 110b. The first and second diaphragms 110a and 110b are fixed to the reciprocating member 120 by disk-shaped diaphragm fixing members 112a and 112b. In the reciprocating member 120, the first and second permanent magnets 140a and 140b are arranged so that the polarities are opposite to each other with the central portion 122 of the reciprocating member 120 sandwiched by a predetermined interval. Yes. That is, the first permanent magnet 140a is arranged so that the N pole surface 142a faces the first E-type core 132a and the S pole surface 144a faces the second E-type core 132b, and the second permanent magnet 140a The magnet 140b is disposed such that the S pole surface 144b faces the first E-type core 132a and the N pole surface 142b faces the second E-type core 132b. Further, in the state where the first and second E-type cores 132a and 132b are not excited, the first permanent magnet 140a and the first magnetic pole portions 134a and 134b and the first magnetic pole portions 134a and 134b are arranged in the direction of the linear path of the reciprocating member 120. The second permanent magnet 140b is disposed between the central magnetic pole portions 134a and 134b and the second side magnetic pole portions 138a and 138b. Yes.

  When an alternating current is applied to the first and second solenoid coils 133a, 133b, the polarities of the magnetic pole surfaces 135a, 135b, 137a, 137b, 139a, 139b of the first and second E-type cores 132a, 132b are It alternates according to the frequency of the alternating current. Since the magnetic pole faces facing each other have different polarities, the direction of the magnetic flux generated between the magnetic pole faces is also changed alternately when the polarities of the magnetic pole faces are changed alternately. For example, when the central magnetic pole surface 135a of the first E-type core 132a is N-pole and the first and second side magnetic pole surfaces 137a and 139a are S-pole, the central magnetic pole of the second E-type core 132b The surface 135b is an S pole, and the first and second side magnetic pole surfaces 137b and 139b are N poles. At this time, the first permanent magnet 140a receives an attractive force from the first side magnetic pole surfaces 137a and 137b and simultaneously receives a repulsive force from the central magnetic pole surfaces 135a and 135b. Further, the second permanent magnet 140b receives an attractive force from the central magnetic pole surfaces 135a and 135b and simultaneously receives a repulsive force from the second side magnetic pole surfaces 139a and 139b. Then, the reciprocating member 120 is driven to the left as viewed in the figure by the force that the first and second permanent magnets 140a, 140b receive from the first and second E-shaped cores 132a, 132b. Thereafter, when the direction of the current is switched, the central magnetic pole surface 135a of the first E-type core 132a becomes the S pole and the first and second side magnetic pole surfaces 137a and 139a become the N pole, and the second E-type core 132b. The central magnetic pole part 135b of the first and second side magnetic pole surfaces 137b and 139b is the S pole, and a force opposite to the previous direction acts on the first and second permanent magnets 140a and 140b, The reciprocating member 120 is driven to the right. Thus, by generating an alternating magnetic field between the magnetic pole surfaces 135a, 135b, 137a, 137b, 139a, 139b, the reciprocating member 120 is reciprocated left and right at the frequency of the alternating current.

  When the reciprocating member 120 is driven to the left side, the volume of the first pump chamber 104a is reduced and the first exhaust valve 150a is opened, so that the fluid in the first pump chamber 104a is transferred to the first exhaust port. The air is exhausted from 154a. On the other hand, the volume of the second pump chamber 104b is expanded, the second intake valve 152b is opened, and fluid is sucked into the second pump chamber 104b from the second intake port 156b. Next, when the reciprocating member 120 is driven to the right side, the volume of the first pump chamber 104a is expanded and the first intake valve 152a is opened to reverse the first intake port 156a. The fluid is sucked into the first pump chamber 104a, while the volume of the second pump chamber 104b is reduced and the second exhaust valve 150b is opened so that the fluid in the second pump chamber 104b is second. The exhaust port 154b is exhausted. The diaphragm type electromagnetic reciprocating fluid device 100 repeats such an operation to convey the fluid on the first and second intake ports 156a, 156b side to the first and second exhaust ports 154a, 154b side as needed. It is supposed to be.

  The first permanent magnet 140a is located on the central portion 122 side of the reciprocating member 120 and has a wide portion 146a on the side close to the central magnetic pole portions 134a and 134b of the first and second E-shaped cores 132a and 132b, It has a narrow portion 148a located on the opposite side and close to the first side magnetic pole portions 136a, 136b. Similarly, the second permanent magnet 140b is located on the central portion 122 side of the reciprocating member 120 and has a wide portion on the side close to the central magnetic pole portions 134a and 134b of the first and second E-shaped cores 132a and 132b. 146b and a narrow portion 148b located on the opposite side and close to the second side magnetic pole portions 138a and 138b. By adopting such a shape, the distance between each permanent magnet 140a, 140b and each side magnetic pole part 136a, 136b, 138a, 138b becomes larger than the distance between the central magnetic pole part 134a, 134b, The force that each permanent magnet 140a, 140b receives from each side magnetic pole part 136a, 136b, 138a, 138b is relatively smaller than the force that it receives from the central magnetic pole part 134a, 134b. The first and second permanent magnets 140a and 140b actually receive an attractive force or a repulsive force in an oblique direction with respect to the direction of the linear path from each magnetic pole portion, but the reciprocating member 120 has the first and second reciprocating members 120. The force in the direction attracted to the E-shaped cores 132a and 132b is greater than the force received by the first and second permanent magnets 140a and 140b from the central magnetic pole portions 134a and 134b. The side magnetic pole portions 136a, 136b, 138a, Since it is more greatly affected by the force received from 138b, it is possible to reduce the force with which the reciprocating member 120 is attracted to the first and second E-shaped cores 132a and 132b by using the shape as described above. Become. On the other hand, the force with which the reciprocating member 120 is attracted toward the E-type cores 132a and 132b is reduced, and the displacement amount of the reciprocating member 120 toward the E-type cores 132a and 132b is reduced. Since the distance between the second permanent magnets 140a and 140b and the central magnetic pole portions 134a and 134b can be set smaller than the conventional one, by doing so, the distance in the direction of the linear path can be set. Thrust can be increased. In addition, since the rigidity of the first and second diaphragms 110a and 110b necessary for preventing the reciprocating member 120 from contacting the E-shaped cores 132a and 132b is also reduced, the diaphragms 110a and 110b having low rigidity are attached. It is also possible to use it, thereby reducing the resistance to reciprocation of the reciprocating member 120 in the direction of the linear path and reducing the loss of thrust, so that the reciprocating member 120 can be efficiently used with a larger stroke. It can be driven.

  As shown in FIG. 2, the diaphragm type electromagnetic reciprocating fluid device 200 according to the second embodiment of the present invention has the first and second permanent magnets 240a and 240b except for the shapes of the first and second permanent magnets 240a and 240b. The diaphragm type electromagnetic reciprocating fluid device 100 according to the embodiment has the same structure. In the first permanent magnet 240a in the second embodiment, the N pole surface 242a and the S pole surface 244a are inclined with respect to the direction of the linear path of the reciprocating member 220, and are close to the central magnetic pole portions 234a and 234b. The width between the N pole face 242a and the S pole face 244a is continuously reduced from the side to the side closer to the first side magnetic pole parts 236a, 236b. Similarly, in the second permanent magnet 240b, the N pole surface 242b and the S pole surface 244b are inclined with respect to the direction of the linear path of the reciprocating member 220, and from the side close to the central magnetic pole portions 234a and 234b. The width between the N-pole surface 242b and the S-pole surface 244b is continuously reduced toward the side close to the second side magnetic pole portions 238a, 238b. By adopting such a shape, the distance between each permanent magnet 240a, 240b and each side magnetic pole part 236a, 236b, 238a, 238b becomes larger than the distance between the central magnetic pole part 234a, 234b, Since the force received from each side magnetic pole part 236a, 236b, 238a, 238b by each permanent magnet 240a, 240b is relatively smaller than the force received from the central magnetic pole part 234a, 234b, the same as in the first embodiment described above. In addition, it is possible to reduce the force with which the reciprocating member 220 is attracted to the first and second E-type cores 232a and 232b.

  As shown in FIG. 3, the diaphragm type electromagnetic reciprocating fluid device 300 according to the third embodiment is the first in FIG. 1 except that the solenoid coil is not wound around the second E-type core 332b. The diaphragm type electromagnetic reciprocating fluid device 100 according to the embodiment has the same configuration. Excitation of the first and second E-type cores 332a and 332b is performed by a solenoid coil 333a wound around the first E-type core 332a, and the second E-type core 332b functions as a back core. In the present embodiment, the second E-type core 332b has the same shape as the first E-type core 332a. However, the central magnetic pole portion 334b and the first and first magnetic pole portions 334b are not wound around the solenoid coil. The two side magnetic pole portions 336b and 338b may be shortened. Further, the shapes of the first and second permanent magnets 340a and 340b may be the same as the shapes of the first and second permanent magnets 240a and 240b in the second embodiment.

DESCRIPTION OF SYMBOLS 100 Diaphragm type electromagnetic reciprocating fluid apparatus 102 Head cover 104a 1st pump chamber 104b 2nd pump chamber 110a 1st diaphragm 110b 2nd diaphragm 112a Diaphragm fixing member 112b Diaphragm fixing member 120 Reciprocating member 122 Central part 130 Stator core 132a First E-type core 132b Second E-type core 133a First solenoid coil 133b Second solenoid coils 134a, 134b Central magnetic pole part 135a, 135b Central magnetic pole surface 136a, 136b First side magnetic pole part 137a, 137b First side magnetic pole surface 138a, 138b Second side magnetic pole portion 139a, 139b Second side magnetic pole surface 140a First permanent magnet 140b Second permanent magnet 142a, 142b N-pole surface 144a, 144b S-pole surface 146a, 146b Wide portion 148a, 148b Narrow portion 150a First exhaust valve 150b Second exhaust valve 152a First intake valve 152b Second intake valve 154a First exhaust port 154b Second exhaust port 156a First Intake port 156b Second intake port 200 Diaphragm electromagnetic reciprocating fluid device 220 Reciprocating member 232a First E-type core 232b Second E-type core 234a, 234b Central magnetic pole part 236a, 236b First side magnetic pole Part 238a, 238b Second side magnetic pole part 240a First permanent magnet 240b Second permanent magnet 242a, 242b N pole face 244a, 244b S pole face 300 Diaphragm electromagnetic reciprocating fluid device 332a First E type core 332b Second E-type core 333a Solenoid coil 334 b Central magnetic pole portion 336b First side magnetic pole portion 338b Second side magnetic pole portion 340a First permanent magnet 340b Second permanent magnet

Claims (3)

A reciprocating member connected to the diaphragm; and a drive unit that drives the reciprocating member to reciprocate along a linear path. The diaphragm is changed by the reciprocating motion of the reciprocating member to suck and exhaust the fluid. A diaphragm-type electromagnetic reciprocating fluid device adapted to
The driving unit includes a first magnetic pole part and a first magnetic pole part having a central magnetic pole part and first and second side magnetic pole parts arranged on both sides of the central magnetic pole part with a gap in the direction of the linear path. The E-type core is set so that the central magnetic pole portions, the first side magnetic pole portions, and the second side magnetic pole portions face each other on both sides of the linear path. First and second E-type cores, and a solenoid coil wound around at least one of the first and second E-type cores;
The reciprocating member includes the central magnetic pole portion of the first and second E type cores in the direction of the linear path in a state where the first and second E type cores are not excited by the solenoid coil. And a first permanent magnet located between the first side magnetic pole part and a second permanent magnet located between the central magnetic pole part and the second side magnetic pole part. ,
The first permanent magnet is arranged such that the N pole face faces the first E-type core and the S pole face faces the second E-type core, and the second permanent magnet is the S pole face. Is arranged so that it faces the first E-type core and the N pole face faces the second E-type core,
The first permanent magnet has the N pole at a position closer to the first side magnetic pole part than a width between the N pole face and the S pole face at a position close to the central magnetic pole part. The width between the face and the S pole face is reduced,
The second permanent magnet has the N pole at a position closer to the second side magnetic pole part than the width between the N pole face and the S pole face at a position close to the central magnetic pole part. A diaphragm electromagnetic reciprocating fluid device in which the width between the surface and the S pole surface is reduced. The first permanent magnet has a wide portion positioned on the central magnetic pole portion side and a narrow portion positioned on the first side magnetic pole portion side and having a width narrower than the wide portion. ,
The second permanent magnet has a wide portion located on the side of the central magnetic pole portion, and a narrow portion located on the side of the second side magnetic pole portion and made narrower than the wide portion. The diaphragm electromagnetic reciprocating fluid device according to claim 1. The N pole face and S pole face of the first permanent magnet are inclined with respect to the direction of the linear path, and the width between the N pole face and the S pole face is close to the central magnetic pole portion. From a position to be continuously reduced to a position close to the first side magnetic pole part,
The N pole face and S pole face of the second permanent magnet are inclined with respect to the direction of the linear path, and the width between the N pole face and the S pole face is close to the central magnetic pole portion. The diaphragm type electromagnetic reciprocating fluid device according to claim 1, wherein the diaphragm type electromagnetic reciprocating fluid device is continuously reduced from a position to a position close to the second side magnetic pole portion.

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