JP2007154752A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower always rotatable at high speeds as a hydrostatic bearing by guiding the air in an impeller storage chamber between the shaft and the sleeve of a motor, capable of blowing large-volume and high-pressure air even if its size is small, and having economical efficiency and a long life. <P>SOLUTION: This blower comprises an impeller rotatably installed in a case having the impeller storage chamber with an air inlet and an air outlet, the shaft fixed to the case, and the motor having the sleeve rotatably fixed to the shaft and to which the impeller is fixed. The blower further comprises a sealed air passage axially formed in the shaft of the motor and the hydrostatic bearing composed of a large number of discharge passages communicating with the air passage to discharge air to the outer peripheral part of the shaft and an air guide passage guiding the air in the impeller storage chamber into the air passage. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

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

Since a blower using such a bearing cannot be rotated at high speed, in order to obtain a necessary air volume, a certain degree of impeller is necessary, so that downsizing is difficult and life 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 eddy current loss and the hysteresis loss of the iron core increase as the speed increases.
nothing special

  In view of the above-mentioned conventional drawbacks, the present invention guides the air in the impeller housing chamber between the motor shaft and the sleeve, and can always rotate at high speed as a static pressure bearing. The purpose is to provide an air blower that is economical and has a long service life.

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 has a case body having an impeller storage chamber having an air inlet formed in the upper portion and a discharge port formed in a peripheral wall, and is rotatable in the impeller storage chamber of the case body. An impeller capable of sucking air from the attached air introduction port and discharging it from the discharge port, a shaft fixed to the case body, and rotatably mounted on the shaft, the impeller being fixed In a blower comprising a motor having a sleeve, a sealed air passage formed in the axial direction in the shaft of the motor, and a number of air that can communicate with the air passage and exhaust air to the outer periphery of the shaft. A blower is constituted by a single pressure passage and a static pressure bearing including an air introduction passage for guiding the air in the impeller housing chamber into the air passage.

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

(1) A case body having an impeller storage chamber in which an air introduction port and an exhaust port are formed, and air is sucked from the air introduction port rotatably mounted in the impeller storage chamber of the case body, In a blower comprising an impeller that can be discharged from an outlet, a shaft that is fixed to the case body, and a motor that is rotatably attached to the shaft and has a sleeve to which the impeller is fixed. A sealed air passage formed in the axial direction in the shaft, a plurality of discharge passages communicating with the air passage and capable of discharging air to the outer peripheral portion of the shaft, and the impeller housing in the air passage Since a static pressure bearing consisting of an air introduction passage that guides indoor air is provided, the air in the impeller housing chamber is automatically supplied between the shaft and the sleeve during operation to form a static pressure bearing. It is possible.
Therefore, high-speed rotation is possible at all times, and even with a small size, high-pressure air can be blown with a large amount of air, so that economical and long life can be achieved.

(2) According to the above (1), high-precision dynamic pressure generating groove processing is not required unlike a dynamic pressure bearing, and processing is easy and can be manufactured at low cost.

(3) According to the above (1), since the air in the impeller housing chamber using the hydrostatic bearing is only a part, it can be efficiently used without reducing the high-pressure air discharged from the discharge port. .

(4) In the second and third aspects, the same effects as in the above (1) to (3) 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 inlet 2 formed in an upper portion thereof and a discharge port 3 formed in a peripheral wall. A case body 5 having an impeller housing chamber 4 formed; a cover body 8 formed with an air suction port 7 fixed by a plurality of screws 6 so as to cover an upper portion of the case body 5; and the case body An impeller 9 that can suck air from the air inlet 2 that is rotatably mounted in the impeller housing chamber 5 and discharge the air at a higher pressure than the discharge port 3. A motor 10 attached to the case body 5 so as to be able to rotate, and a hydrostatic bearing 13 configured by supplying air in the impeller housing chamber 4 between a sleeve 11 and a shaft 12 of the motor 10; It consists of

  The case body 5 includes a base plate 14, a motor insertion cylinder 16 that is fixed to the base plate 14 with a plurality of screws 15 and covers an outer peripheral portion of the motor 10 and a lower portion of the impeller 9, and the impeller storage chamber. A lower impeller housing wall 17, a peripheral wall 18 in which a part of the discharge port 3 is formed, and a lower case 20 that forms a sealed lower chamber 19 with the base plate 14, and the lower case An air inlet 2 and an upper valve recessed portion 23 of the upper valve portion 22 are formed in the central portion fixed by a plurality of screws 21 at the upper portion of 20, covering the upper portion of the impeller 9, An upper impeller housing wall 24, a peripheral wall 25 in which a part of the discharge port 3 is formed, and an upper case body 27 in which a mounting portion 26 is attached to the cover body 8 with a plurality of screws 6 so as to cover the upper portion. It consists of and.

  As shown in FIGS. 4 and 5, the motor 10 includes a substrate 29 provided with a motor drive circuit (not shown) fixed on the upper surface of the base plate 14 of the case body 5 with a plurality of screws 28; A base plate 30 fixed to the base plate 14 with a plurality of screws 28 for mounting the substrate 29, a shaft 12 having a lower end fixed to the base plate 30, and an upper portion protruding onto the substrate 29, A sleeve 11 rotatably disposed on the outer peripheral portion, a coil 31 attached to the substrate 29 so as to be positioned on the outer peripheral portion of the sleeve 11, and an upper portion of the shaft 12 fixed to the upper portion of the sleeve 11 And a hub 33 whose central upper portion is a shaft portion 32 for mounting the impeller 9, the sleeve 11 attached to the hub 33, and the coil 3. , A yoke 36 having a rotor magnet 35 attached to an inner wall surface attached to the outer peripheral portion of the hub 33, and a recess 37 formed in the hub 33 at an upper position of the shaft 12. The outer magnet 38 is fixed to the outer magnet 38, and the inner magnet 39 is fixed to the upper end of the shaft 12 so as to be positioned in the outer magnet 38.

  As shown in FIGS. 6 and 7, the impeller 9 includes a boss 40 fitted and fixed to a shaft portion 32 of a hub 33 serving as a rotating member of the motor 10, and a sequentially outer lower portion integrally formed with the boss 40. A blade support plate 41 inclined to the surface, a plurality of blade plates 42 integrally formed on the upper surface of the blade support plate 41 and formed in an arc shape so that the height dimension is gradually reduced on the outside, and the plurality of blade plates 42 An upper cover plate 44 having an upper valve piece 43 at a central end integrally formed so as to cover the upper portion of the blade plate 42 and the motor 10 integrally formed so as to protrude downward on the blade support plate 41. The motor cover cylinder 46 is inserted between the outer periphery of the yoke 36 and the motor insertion hole 45 of the motor insertion cylinder 16 of the lower case 20 of the case body 5.

  The hydrostatic bearing 13 has a sealed air passage 47 formed in the axial direction in the shaft 12 and a plurality of air passages that communicate with the air passage 47 and can discharge air to the outer periphery of the shaft 12. The base plate 14 and the base plate 14 connect the discharge passage 48 and the through hole 49 of the shaft 12 that guides the air in the impeller housing chamber 4 into the air passage 47 and the through hole 50 of the lower impeller housing wall 17. And an air introduction passage 51 formed between the two.

In the blower 1 having the above-described configuration, when the motor 10 is driven, the impeller 9 rotates at high speed, and air is supplied from the air suction port 7 of the cover body 8 and the air introduction port 2 of the case body 5 to a large number of blade plates 42 of the impeller 9. The air is sucked in and is discharged from the discharge port 3 by increasing the pressure, and part of the air in the impeller storage chamber 4 is transferred from the air introduction passage 51, the air passage 47, and a number of discharge passages 48 to the shaft 12 and the sleeve 11. Since the hydrostatic bearing 13 is discharged, the air can be discharged with a large amount of air and high pressure even with a small size.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 8 to 16 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 first embodiment for carrying out the present invention in that a shaft formed using a porous material is used. 12A, the static pressure bearing 13A that uses the porous portion of the shaft 12A as a discharge passage is used, and the blower 1A configured in this way is the best first for carrying out the present invention. The same effect as the form is 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 the sleeve 11A is fixed to the base plate. The shaft 12B is rotatably attached to the sleeve 11A, and the sleeve 11A is formed with a recess 52 having a small diameter except for the outer peripheral portion of the upper and lower portions, and a sleeve case 54 covering the outer peripheral portion of the sleeve main body 53. The air passage 47A formed by covering the recess 52 of the sleeve body 53 with the sleeve case 54, and the air passage 47A communicated with the air passage 47A so that air can be discharged to the outer peripheral portion of the shaft 12B. A large number of discharge passages 48A formed in the recess 52 portion of the sleeve body 53, and a space for guiding the air in the impeller housing chamber 4 to the air passage 47A. In that provided hydrostatic bearing 13B made of the introduction passage 51A, even if the blower 1B having such a configuration, the same effects as the best first mode for carrying out the present invention is obtained.

  The fourth embodiment for carrying out the present invention shown in FIGS. 14 to 16 is mainly different from the third embodiment for carrying out the present invention in that the sleeve body 53A is made of a porous material. 11B, and the static pressure bearing 13C that does not need to form a large number of discharge passages in the sleeve main body 53A is used. The same effect as the third embodiment can be obtained.

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

1 is a front view of the best first embodiment for carrying out the present invention. The top view of the best 1st form for implementing this invention. Sectional drawing which follows the 3-3 line of FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The principal part expansion explanatory drawing of the motor of the best 1st form for implementing this invention. The top view of the impeller of the 1st best form for implementing this invention. Sectional drawing in alignment with line 7-7 in FIG. The top view of the 2nd form for carrying out the present invention. Sectional drawing which follows the 9-9 line of FIG. The principal part expansion explanatory view of the motor of the 2nd form for carrying out the present invention. The top view of the 3rd form for carrying out the present invention. Sectional drawing which follows the 12-12 line of FIG. The principal part expansion explanatory view of the motor of the 3rd form for carrying out the present invention. The top view of the 4th form for carrying out the present invention. FIG. 15 is a sectional view taken along line 15-15 in FIG. 14; The principal part expansion explanatory view of the motor of the 3rd form for carrying out the present invention.

Explanation of symbols

1, 1A, 1B, 1C: blower, 2: air inlet,
3: discharge port, 4: impeller storage room,
5: Case body, 6: Screw,
7: Air suction port, 8: Cover body,
9: Impeller, 10: Motor,
11, 11A: Sleeve, 12, 12A, 12B: Shaft,
13, 13A, 13B, 13C: hydrostatic bearings,
14: Base plate, 15: Screw,
16: Motor insertion cylinder, 17: Lower impeller storage wall,
18: Perimeter wall, 19: Lower chamber,
20: Lower case, 21: Screw,
22: Upper valve part, 23: Upper valve recessed part,
24: Upper impeller storage wall, 25: Perimeter wall,
26: mounting portion, 27: upper case body,
28: Screw, 29: Substrate,
30: Base plate, 31: Coil,
32: Shaft part, 33: Hub,
34: Back yoke, 35: Rotor magnet,
36: York, 37: Recess,
38: Outer magnet, 39: Inner magnet,
40: boss, 41: blade support plate,
42: vane plate, 43: upper valve piece,
44: Upper cover plate, 45: Motor insertion hole,
46: motor cover cylinder, 47, 47A: air passage,
48, 48A: discharge passage, 49: through hole,
50: through hole 51, 51A: air introduction passage,
52: Recess, 53, 53A: Sleeve body,
54: Sleeve case.

Claims (3)

Air is sucked from the case body having an impeller housing chamber having an air inlet formed in the upper part and a discharge port formed in the peripheral wall, and the air inlet port rotatably mounted in the impeller housing chamber of the case body. In a blower comprising an impeller that can be discharged from the discharge port, a shaft that is fixed to the case body, a motor that is rotatably attached to the shaft and includes a sleeve to which the impeller is fixed, A sealed air passage formed in the axial direction in the shaft of the motor, a plurality of discharge passages communicating with the air passage and capable of discharging air to the outer peripheral portion of the shaft, and into the air passage A blower comprising a static pressure bearing comprising an air introduction passage for guiding the air in the impeller housing chamber. Air is sucked from the case body having an impeller housing chamber having an air inlet formed in the upper part and a discharge port formed in the peripheral wall, and the air inlet port rotatably mounted in the impeller housing chamber of the case body. In a blower comprising an impeller that can be discharged from the discharge port, a shaft that is fixed to the case body, a motor that is rotatably attached to the shaft and includes a sleeve to which the impeller is fixed, A static pressure bearing comprising a shaft of the motor made of a porous material, an air passage formed axially in the shaft, and an air introduction passage for guiding the air in the impeller housing chamber into the air passage. A blower characterized by comprising: Air is sucked from the case body having an impeller housing chamber having an air inlet formed in the upper part and a discharge port formed in the peripheral wall, and the air inlet port rotatably mounted in the impeller housing chamber of the case body. And a blower comprising an impeller that can be discharged from the discharge port, a sleeve that is fixed to the case body, and a motor that is rotatably mounted in the sleeve and includes a shaft to which the impeller is fixed. A blower comprising a static pressure bearing configured using an air introduction passage for supplying air in the impeller housing chamber between the sleeve and the shaft.

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