JP2006002651A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical and long life blower capable of rotating at high speed, sending high pressure high volume air even if it is small. <P>SOLUTION: This blower consists of a case body having an air suction opening formed on at least one side surface and a discharging opening formed on a circumference wall, a motor using a fluid dynamic pressure bearing attached in the case body, and an impeller fixed on a rotary member of the motor to be position on an outer circumference part of the motor and capable of sucking air from the air suction opening and discharging air from the discharging opening by rotation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blower called a sirocco fan or a turbo blower.

  A conventional blower rotatably supports an impeller shaft via a ball bearing, an oilless metal, a bearing, and an oil-impregnated bearing.

Since a blower using such a bearing cannot be rotated at a high speed, a large impeller is required to obtain a necessary air volume, so that downsizing is difficult and the lifetime is short. was there.
Further, a blower of a type in which an impeller is attached to a motor having an iron core has a drawback that the higher the eddy current loss and the hysteresis loss of the iron core, the higher the speed.
nothing special.

  An object of the present invention is to provide a blower that is capable of high-speed rotation, capable of high-speed ventilation with a large air volume, and that is economical and has a long life.

  In addition, the present invention can prevent the impeller from moving extremely in the thrust direction as it blows air, thereby preventing the impeller from contacting the case body and reducing vibration and noise. Another purpose is to provide a blower.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  In order to achieve the above object, the present invention provides a case body in which an air suction port is formed on at least one side surface and a discharge port is formed on a peripheral wall, and a motor using a fluid dynamic pressure bearing attached to the case body. A blower is constituted by an impeller fixed to a rotating member of the motor so as to be positioned on the outer peripheral portion of the motor and capable of sucking air from the air suction port by rotation and discharging the air from the discharge port. is doing.

  As is clear from the above description, the present invention has the following effects.

(1) A case body in which an air suction port is formed in at least one side surface and a discharge port is formed in a peripheral wall; a motor using a fluid dynamic pressure bearing attached in the case body; The impeller is fixed to the rotating member of the motor and can be sucked from the air suction port by rotation and discharged from the discharge port. It can be rotated by a motor using a pressure bearing.
Therefore, since the impeller is rotatably supported by a non-contact fluid dynamic pressure bearing without using a contact bearing such as a ball bearing, oilless metal, oil-impregnated bearing or the like as in the past, high-speed rotation is possible. Even with a small size, it can blow high pressure with a large air volume.

(2) According to the above (1), contact resistance and wear can be suppressed without contact during rotation, so that it is economical and has a long life.

(3) By adopting a coreless motor as the motor of (1), it is possible to eliminate the eddy current loss and the hysteresis loss of the iron core, thereby obtaining the effect of reducing the loss.

(4) In claim 2, the same effects as in the above (1) to (3) can be obtained, and an accident in which the impeller moves extremely in the thrust direction and contacts the case body by the contact prevention means can be efficiently performed. Can be prevented.

(5) In claim 3, the same effects as in the above (1) to (3) can be obtained, and the suction noise can be reduced by at least one silencing chamber of the air suction passage.

(6) In the fourth aspect, the same effects as in the above (4) and (5) can be obtained.

  Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the invention shown in the drawings.

  In the best mode for carrying out the present invention shown in FIGS. 1 to 7, reference numeral 1 denotes a blower according to the present invention. The blower 1 has an air suction port 3 formed on one side surface 2 and is exhausted on a peripheral wall 4. A case body 6 in which the outlet 5 is formed, a motor 7 using a fluid dynamic pressure bearing attached to the case body 6 and driven by high-speed rotation, and the motor 7 so as to be positioned on the outer peripheral portion. It is composed of an impeller 8 fixed to a rotating member of the motor 7 and capable of sucking air from the air suction port 3 by rotation and discharging it from the discharge port 5.

  The case body 6 has mounting portions 11 and 11 in which insertion holes 10 such as screws 9 are formed in the outer peripheral portion, and a fixed case 12 in which a part of the discharge port 5 is formed, and the fixed case 12 A cover case 15 having engagement holes 14, 14, 14 that can be detachably attached to a plurality of locking pieces 13, 13, 13 and formed with a part of the air suction port 3 and the discharge port 5. It consists of and.

The motor 7 is fixed so as to protrude upward from the base plate 17 provided with a motor drive circuit (not shown) fixed to the inner bottom surface of the fixed case 12 of the case body 6. A shaft 18, a sleeve 20 disposed on the outer peripheral portion of the shaft 18 via a minute gap 19, a rotor 21 in which a permanent magnet attached to the outer peripheral portion of the sleeve 20 is disposed, and an outer peripheral portion of the rotor 21 A coreless corrugated continuous coil 22 attached to the base plate 17, a back yoke 23 provided on the outer periphery of the coil 22, the sleeve 20, the rotor 21, and the back yoke 23. And a hub 24 as a rotating member that covers the upper portion of the shaft 18 and the outer periphery of the back yoke 23, A ring-shaped thrust magnet 26 fixed to the concave portion 25 at the upper portion of the hub 24 covering the hub 18, and a ring-shaped thrust magnet 27 fixed to the upper portion of the shaft 18 so as to face the thrust magnet 26. Has been.

  The impeller 8 is a disc-shaped impeller body 28 fitted and fixed to a substantially central outer peripheral portion of a hub 24 as a rotating member of the motor 7, and outwardly on both surfaces of the outer peripheral portion of the impeller body 28. A plurality of blades 29, 29 integrally formed at regular intervals so as to protrude, and the impellers formed at regular intervals in portions other than the formation sites of the numerous blades 29, 29 of the impeller body 28 It is composed of a large number of through holes 30 as contact preventing means for preventing the impeller 8 from moving more than necessary in the thrust direction by making pressures on both surfaces of the main body 28 substantially the same.

In the blower 1 having the above-described configuration, when the motor 7 is driven, the impeller 8 rotates at high speed, and air can be sucked from the air suction port 3 of the case body 6 and discharged from the discharge port 5. Can blow.
At this time, since the motor 7 has the rotor 21 and the coreless corrugated continuous coil 22 disposed on the outer peripheral portion of the sleeve 20 disposed on the outer peripheral portion of the shaft 18 via the minute gap 19 and the permanent magnet having a rotating structure. No harmful force is applied to the shaft 18 and sleeve 20 from the magnetic circuit that generates the rotational force.
For this reason, basically, it is only necessary to have a bearing rigidity sufficient to support the weight of the rotor 21.
Further, even if the impeller 8 rotates at a high speed, both surfaces of the impeller body 28 become substantially the same pressure by the large number of through holes 30 as contact preventing means, and the impeller 8 moves more than necessary in the thrust direction. Can be prevented.
As described above, since the motor 7 using the fluid dynamic pressure bearing is used, it is possible to send a high-pressure air with a large air volume even with a small size, which is economical and can have a long life, and in the thrust direction of the impeller 8. It is possible to prevent the contact with the case body 6 by preventing movement more than necessary.
Furthermore, eddy current loss and iron core hysteresis loss can be suppressed by making the motor a coreless motor.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 8 to 20 will be described. In the description of these different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals and redundant description is omitted. To do.

  The second embodiment for carrying out the present invention shown in FIGS. 8 to 10 is mainly different from the best first embodiment for carrying out the present invention in that an arcuate air suction is applied to the fixed case 12. While using the case body 6A in which the grooves 31 and 31 are formed and using the motor 7A in which the back yoke 23 is fixed to the base plate 17, the blower 1A configured as described above is used to implement the present invention. Therefore, the same effects as those of the best first embodiment can be obtained.

The third embodiment for carrying out the present invention shown in FIGS. 11 to 13 is mainly different from the best first embodiment for carrying out the present invention in that an impeller has a flange 33 at the bottom. The sirocco fan 32 having a plurality of blades provided on the flange 33 is used, and a plurality of through holes as contact prevention means formed at regular intervals in the flange 33 of the sirocco fan 32 Even with the blower 1B configured using such a sirocco fan 32, the same operational effects as those of the best mode for carrying out the present invention can be obtained.
In the embodiment of the present invention, a contact preventing means may be provided in which magnets having the same magnetic poles repelling the upper end portion of the sirocco fan 32 and the inner wall surface of the case body 6A facing the upper end portion are provided.

The fourth embodiment for carrying out the present invention shown in FIGS. 14 to 16 is mainly different from the best first embodiment for carrying out the present invention in that, for example, the depth of the trapezoidal groove is A blade that uses a shaft 18A formed with left and right lead dynamic pressure grooves 34, 35 having a diameter of 3 microns, a lead angle of 30 °, a groove width of 0.5 mm, and a pitch interval of 1 mm, and does not form a large number of through holes. Using the vehicle 8A, a magnet 46 fixed to the outer periphery of the upper portion of the hub 24, and a contact preventing means for fixing a magnet 47 repelling the magnet 46 to the inner wall surface of the cover case 15 of the case body 6 corresponding to the magnet 46 Even with the blower 1C configured as described above in that 30A is used, the same effects as the best first embodiment for carrying out the present invention can be obtained.
The contact preventing means 30 </ b> A may be formed with a spiral groove in the upper outer peripheral portion of the hub 24 so as to prevent contact with the thrust dynamic pressure generated by the rotation of the hub 24.
Further, even if the repelling magnets 46 and 47 are fixed to the center upper surface of the shaft 18A and the center of the recess 25 at the upper part of the hub 24, the movement in the thrust direction can be restricted.

The fifth embodiment for carrying out the present invention shown in FIGS. 17 to 20 is mainly different from the best first embodiment for carrying out the present invention in that an impeller housing chamber 36, an air suction port. 3, a fixed case 12A in which a first air chamber 37 communicating with the air suction port 3 and a second air chamber 39 communicating with the first air chamber 37 via a communication hole 38 are formed, A partition wall 42 formed with a second communication hole 40 communicating with the second air chamber 39 covering the opening 12a of the fixed case 12A and a third communication hole 41 communicating with the impeller housing chamber 36; In the interior that covers the upper part of this partition wall 42? An air passage which is provided with a partition plate 43 having a lower shape in a letter shape and guides the air from the second communication hole 40 to the third communication hole 41 through the outer periphery of the partition plate 43. The case body 6B is formed of a shallow lid-like cover case 15A formed with 44, and the air sucked from the air suction port 3 is supplied to the first air chamber 37, the communication hole 38, the second air chamber 39, A blower configured by using a case body 6B in which such a silencing air suction passage 45 is formed in that the silencing air suction passage 45 including the second communication hole 40, the air passage 44, and the third communication hole 41 is used. Even if it is 1D, it is possible to obtain the same effect as the best first embodiment for carrying out the present invention and to reduce the suction sound of air.
In the embodiment for carrying out the present invention, the first air chamber 37, the communication hole 38, the second air chamber 39, the second communication hole 40, and the air passage 44 are used for silencing the case body. Although the description has been given of the use of the silenced air suction passage 45 including the third communication hole 41, the present invention is not limited to this, and at least one silencer chamber may be formed.

In the first and second preferred embodiments for carrying out the present invention, the use of the impeller 8 formed with a large number of through holes 30 as contact preventing means has been described. The ring-shaped thrust magnet 26 and the magnet of the thrust magnet 27 fixed to the upper part of the shaft 18 are used to prevent the extreme movement in the thrust direction or to pull it back along with the movement in the thrust direction. A similar effect can be obtained even if a magnet for generating the above is provided.
Moreover, although each form for implementing the said invention demonstrated what uses the coreless waveform continuous coil 22 as a coil, this invention is not restricted to this, You may use coils other than a coreless waveform continuous coil.
Furthermore, the impeller is formed of a plastic magnet, and the contact prevention means for restricting movement in the rotor magnet and the thrust direction is formed integrally with the impeller, thereby reducing the number of components and simplifying the manufacturing process. An effect can be obtained.

  The present invention is used in the industry for manufacturing blowers.

The top view of the best 1st form for implementing this invention. 1 is a front view of the best first embodiment for carrying out the present invention. The bottom view of the best 1st form for implementing this invention. The top view of the state which removed the cover case of the best 1st form for implementing this invention. Sectional drawing which follows the 5-5 line of FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a motor according to a first embodiment for carrying out the present invention. Explanatory drawing of the impeller of the best 1st form for implementing this invention. The top view of the 2nd form for carrying out the present invention. The bottom view of the 2nd form for carrying out the present invention. Sectional drawing which follows the 10-10 line of FIG. The top view of the 3rd form for carrying out the present invention. The bottom view of the 3rd form for carrying out the present invention. Sectional drawing which follows the 13-13 line | wire of FIG. The top view of the 4th form for carrying out the present invention. The bottom view of the 4th form for carrying out the present invention. Sectional drawing of the motor of the 4th form for implementing this invention. The perspective view of the 5th form for implementing this invention. The disassembled perspective view of the 5th form for implementing this invention. FIG. 19 is a sectional view taken along line 19-19 in FIG. 17; FIG. 20 is a sectional view taken along line 20-20 in FIG.

Explanation of symbols

1, 1A, 1B, 1C, 1D: blower,
2: One side, 3: Air suction port,
4: peripheral wall, 5: discharge port,
6, 6A, 6B: Case body 7, 7A, 7B: Motor,
8, 8A: Impeller, 9: Screw,
10: insertion hole, 11: mounting part,
12, 12A: fixed case, 13: locking piece,
14: engagement hole 15, 15A: cover case,
17: Base plate,
18, 18A: shaft, 19: minute gap,
20: Sleeve, 21: Rotor,
22: Coreless waveform continuous coil, 23: Back yoke,
24: Hub as a rotating member, 25: Recess,
26: Thrust magnet, 27: Thrust magnet,
28: Impeller body, 29: Blade,
30: a large number of through-holes as contact prevention means,
31: Air suction groove, 32: Sirocco fan,
33: Base part, 34: Dynamic pressure groove of left lead,
35: Dynamic pressure groove of right lead, 36: Impeller storage room,
37: first air chamber, 38: communication hole,
39: second air chamber, 40: second communication hole,
41: 3rd communicating hole, 42: Partition wall,
43: Partition plate, 44: Air passage,
45: Silent air suction passage, 46: Magnet,
47: Magnet.

Claims (4)

A case body in which an air suction port is formed on at least one side surface and a discharge port is formed on the peripheral wall, a motor using a fluid dynamic pressure bearing attached to the case body, and a motor that uses a fluid dynamic pressure bearing, An air blower comprising: an impeller fixed to a rotating member of the motor and capable of sucking air from the air suction port by rotation and discharging the air from the discharge port. A case body in which an air suction port is formed on at least one side surface and a discharge port is formed on the peripheral wall, a motor using a fluid dynamic pressure bearing attached to the case body, and a motor that uses a fluid dynamic pressure bearing, The impeller fixed to the rotating member of the motor and capable of sucking air from the air suction port by rotation and discharging it from the discharge port, and preventing the impeller from moving more than necessary in the thrust direction. A blower comprising contact prevention means for preventing contact with the case body. A case body in which an impeller housing chamber is formed, a motor using a fluid dynamic pressure bearing mounted in the impeller housing chamber of the case body, and a rotating member of the motor so as to be positioned on the outer periphery of the motor An air suction passage composed of at least one silencing chamber and an air suction port formed in the case body, wherein the air is sucked into the impeller housing chamber by rotation of the impeller, A blower comprising: a discharge passage formed in the case body for discharging air sucked into the impeller housing chamber by rotation of the impeller to the outside. A case body in which an impeller housing chamber is formed, a motor using a fluid dynamic pressure bearing mounted in the impeller housing chamber of the case body, and a rotating member of the motor so as to be positioned on the outer periphery of the motor An impeller fixed to the impeller, contact preventing means for preventing the impeller from moving in the thrust direction and preventing the impeller from coming into contact with the case body, and rotation of the impeller into the impeller storage chamber An air suction passage formed of at least one silencing chamber and an air suction port formed in the case body for sucking air, and air sucked into the impeller housing chamber by the rotation of the impeller is discharged to the outside. A blower comprising a discharge passage formed in the case body.