JP2007154777A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower enabling easy processing for forming a hydrodynamic bearing, capable of providing energy-saving effect by reducing a loss produced in the bearing, and manufacturable at low cost. <P>SOLUTION: This blower comprises a shaft fixed to a case body, a motor having a sleeve rotatably mounted on the shaft with the hydrodynamic bearing disposed therebetween, and two or more impellers fixed to the sleeve of the motor in two or more stages. The blower further comprises two or more separate sleeves formed by separating the sleeve into two or more pieces so that the two or more impellers can be fixed and a binding means binding the two or more separate sleeves to each other so that they can be integrally rotated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a blower in which impellers must be arranged in two or more stages or a shaft must be set long.

  Conventionally, this type of blower uses a sleeve that is approximately the same length as the shaft.

For this reason, the sleeve is long and processing is troublesome, and when trying to make a hydrodynamic pressure bearing, it is very difficult to process the inner diameter of the sleeve, and there is a disadvantage that the loss generated in the bearing becomes large in terms of performance. .
nothing special

  SUMMARY OF THE INVENTION In view of the above-described conventional drawbacks, the present invention has an object to provide an inexpensive blower that can be easily processed to make a fluid dynamic pressure bearing, that loss generated in the bearing can be reduced, and that an energy saving effect can be obtained. It is said.

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.

To achieve the above object, the present invention provides a motor having a shaft fixed to a case body, a sleeve rotatably attached to the shaft via a fluid dynamic pressure bearing, and a sleeve of the motor in two or more stages. In a blower comprising two or more fixed impellers, two or more separation sleeves that are separated into two or more so that the two or more impellers can be respectively fixed, and the 2 A blower is constituted by coupling means for coupling the plurality of separation sleeves so as to rotate together.

  The present invention provides an upper and lower sleeve supported on the upper and lower portions of a case body via an elastic body, a shaft rotatably attached to the upper and lower sleeve via a fluid dynamic pressure bearing, and the upper and lower sleeves. A blower is constituted by an impeller attached to the shaft and a motor body attached to the case body so as to drive the shaft to rotate.

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

(1) A motor having a shaft fixed to the case body, a sleeve rotatably attached to the shaft via a fluid dynamic pressure bearing, and two or more blades fixed to the motor sleeve in two or more stages In a blower comprising a vehicle, the sleeve is separated into two or more separation sleeves so that the two or more impellers can be respectively fixed, and the two or more separation sleeves are integrated with each other. Thus, the length of the separation sleeve can be shortened.
Therefore, the inner wall surface can be easily processed, and the dynamic pressure generating groove can be easily formed.

(2) Since the sleeve is constituted by two or more separation sleeves and the coupling means according to (1), it has the same function as the conventional sleeve.

(3) According to the above (1), since the separation sleeve is used, the bearing length can be shortened.
Therefore, the loss generated in the bearing can be reduced and an energy saving effect can be obtained.

(4) In claim 2, 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 8, reference numeral 1 denotes a blower according to the present invention. The blower 1 includes a case body 2 and a shaft 3 fixed to the case body 2. A motor 5 having a sleeve 4 rotatably mounted on the shaft 3 via a fluid dynamic pressure bearing, and two or more stages are fixed to the sleeve 4 of the motor 5. It consists of individual upper and lower impellers 6 and 7.

The case body 2 covers a base plate 8, a motor cover cylinder 10 covering the outer periphery of the motor 5 fixed to the base plate 8 with a plurality of screws 9 in a sealed state, and a lower portion of the lower impeller 7. A lower impeller housing wall 12 of the lower impeller housing chamber 11 and a lower case 15 formed with a peripheral wall 14 in which a part of the discharge port 13 is formed, and a plurality of screws 16 are fixed to the upper portion of the lower case 15. The upper impeller housing wall 20 of the lower impeller housing chamber 11 in which the air introduction port 17 and the lower valve recess 19 of the lower valve portion 18 are formed in the central portion, and the peripheral wall 21 in which a part of the discharge port 13 is formed. And a central case 24 in which a lower impeller storage wall 23 of the upper impeller storage chamber 22 covering the lower portion of the upper impeller 6 is formed, and a center fixed to the upper portion of the central case 24 by the plurality of screws 16. Air is introduced into the section 25, an upper case 31 that covers the upper part of the upper impeller 6 in which the upper valve recess 27 of the upper valve part 26 is formed and has an upper impeller storage wall 28 of the upper impeller storage chamber 22. .
The central case 24 is provided with a partition wall 30 formed with a plurality of through holes 29 communicating with the lower impeller storage chamber 11 on the outer periphery of the upper impeller storage chamber 22.

  As shown in FIG. 4, the motor 5 includes a substrate 33 provided with a motor drive circuit (not shown) fixed by a plurality of screws 32 on the upper surface of the base plate 8 of the case body 2, and the substrate 33. A base plate 34 fixed to the base plate 8 by a plurality of screws 32 to be attached, a shaft 3 having a lower end fixed to the base plate 34 and an upper portion protruding onto the substrate 33, and an outer peripheral portion of the shaft 3 It comprises two separation sleeves 35, 35 arranged via a fluid dynamic pressure bearing, and coupling means 36 using a coil spring that couples the two separation sleeves 35, 35 so as to rotate together. Fixed to the sleeve 4, a coil 37 attached to the substrate 33 so as to be positioned on the outer periphery of the lower separation sleeve 35 of the sleeve 4, and an upper portion of the lower separation sleeve 35 The rotor magnet 40 is mounted on the hub 38, the back yoke 39 positioned between the lower separation sleeve 35 and the coil 37 attached to the hub 38, and the inner wall surface attached to the outer peripheral portion of the hub 38. It is comprised with the yoke 41 attached.

  The lower impeller 7 is integrally formed with a boss portion 42 fitted and fixed to the hub 38, a blade support plate 43 that is integrally formed with the boss portion 42, and that inclines outward and downward, and an upper surface of the blade support plate 43. A large number of blades 44 are formed in an arc shape so that the outer dimensions are gradually reduced on the outer side, and a central end that is integrally formed so as to cover the upper parts of the blades 44 is provided above. An upper cover plate 46 having a valve piece 45 and a motor insertion tube 47 inserted into the motor cover tube 10 integrally formed so as to protrude downward on the blade support plate 43 are configured.

The upper impeller 6 is fitted and fixed to an upper hub 48 fitted and fixed to the upper separation sleeve 35 so that the same upper impeller 6 as the lower impeller 7 can be used.
An outer magnet 50 is fixed to the peripheral wall of the concave portion 49 formed in the upper hub 48, and an inner magnet 51 is fixed to the upper end portion of the shaft 3 so as to be positioned in the outer magnet 50.

In the blower 1 having the above-described configuration, when the motor 5 is driven, the sleeve 4 composed of the lower separation sleeve 35 and the upper separation sleeve 35 coupled via the coupling means 36 rotates at a high speed. Is rotated at a high speed, and air is sucked between a large number of blades 44 of the upper impeller 6 from the air inlet 25 of the upper case 31 of the case body 2 to increase the pressure and below the air inlet 17 of the central case 24. The air is sucked into a large number of blades 44 of the impeller 7, and the pressure is further increased and discharged from the discharge port 13 formed in the peripheral walls of the lower case 15 and the central case 24 with a large amount of air and high pressure.
The sleeve 4 of the blower 1 configured as described above has the lower separation sleeve 35 and the upper separation sleeve 35 having short axial dimensions because the upper separation sleeve 35 is coupled to the lower separation sleeve 35 via the coupling member 36. In addition, the inner diameter of the upper and lower separation sleeves 35 and 35 including the fluid dynamic pressure bearing groove can be easily processed, and the loss generated in the bearing can be reduced.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 9 to 26 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.

  In the second embodiment for carrying out the present invention shown in FIGS. 9 to 11, the main difference from the first embodiment for carrying out the present invention is a sleeve 4A, which is a lower separation. In the air blower 1A configured by using the sleeve 4A configured as described above in terms of being used as an elastic coupling means 36A such as a rubber synthetic resin material having elasticity to couple the sleeve 35 and the upper separation sleeve portion 35, The same effect as the first preferred embodiment for carrying out the present invention can be obtained.

  The third embodiment for carrying out the present invention shown in FIGS. 12 to 14 is mainly different from the best first embodiment for carrying out the present invention in the sleeve 4B, which is the lower separation. In this way, the coupling means 36B using the engagement recess 52 and the engagement piece 53 that can be engaged with the upper end portion of the sleeve 35 and the lower end portion of the upper separation sleeve 35 and rotated together is used. Even with the blower 1B configured using the sleeve 4B configured as described above, the same operational effects as those of the best first embodiment for carrying out the present invention can be obtained.

The fourth embodiment for carrying out the present invention shown in FIGS. 15 to 17 is mainly different from the best first embodiment for carrying out the present invention in that the base plate 8 has a lower central portion. A case body using a lower cover 55 in which a bearing recess 54 is formed, and an upper case 31A in which a bearing recess 56 is formed in an upper center portion and a plurality of through holes 57 are formed in a wall surface near the air inlet 25. 2A, and a lower separation sleeve 35A in which a fluid dynamic pressure bearing groove is formed on the inner wall surface attached to the bearing recess 54 of the lower cover 55 via an elastic body 59 using a plurality of plate springs 58, 58; An upper separation sleeve 35A in which a fluid dynamic pressure bearing is formed on the inner wall surface attached to the bearing recess 56 of the upper case 31A via an elastic body 59 using plate springs 58, 58, and the upper separation three 35A and a shaft 3A that is rotatably attached to the lower separation sleeve 35A and that is fitted and fixed to the hub 38 to which the boss 42 of the impeller 7 is fitted and fixed at the center. Even with the constructed blower 1C, the same effects as those of the best first embodiment for carrying out the present invention can be obtained.
Inner magnets 51, 51 are fixed to the upper and lower ends of the shaft 3A, and the inner magnets 51, 51 have a bearing recess 54 of the lower cover 55 and a bearing recess 56 of the upper case 31A. The outer magnets 50 and 50 are fixed.

  The fifth embodiment for carrying out the present invention shown in FIGS. 18 to 20 is mainly different from the fourth embodiment for carrying out the present invention in that the lower separation sleeve 35A and the upper separation sleeve 35A are each two. The present invention is implemented even with the blower 1D configured in this way in that the O-rings 60, 60, 60, 60 are mounted in the bearing recesses 54, 56 via elastic bodies 59A, 59A. The same effects as those of the fourth embodiment for achieving the above are obtained.

  The sixth embodiment for carrying out the present invention shown in FIGS. 21 to 23 is mainly different from the fourth embodiment for carrying out the present invention in that a lower separation sleeve 35A and an upper separation sleeve 35A are provided. In order to carry out the present invention, the blower 1E configured as described above is mounted in the bearing recesses 54 and 56 via elastic bodies 59B and 59B using cylindrical rubber rings 61 and 61, respectively. The same effect as the fourth embodiment can be obtained.

  The seventh embodiment for carrying out the present invention shown in FIGS. 24 to 26 is mainly different from the fourth embodiment for carrying out the present invention in that a lower separation sleeve 35A and an upper separation sleeve 35A are provided. In order to carry out the present invention, the fan 1F configured as described above is mounted in the bearing recesses 54 and 56 via the elastic bodies 59C and 59C using the coil springs 62 and 62, respectively. The same effect as the fourth 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 top view of the impeller of the 1st best form for implementing this invention. The front view of the impeller of the best 1st form for implementing this invention. Sectional drawing which follows the 7-7 line | wire of FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially broken explanatory view of a sleeve of a best first embodiment for carrying out the present invention. The top view of the 2nd form for carrying out the present invention. Sectional drawing which follows the 10-10 line of FIG. The partially broken explanatory view of the sleeve 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 13-13 line | wire of FIG. The partially broken explanatory view of the sleeve of the 3rd form for carrying out the present invention. The top view of the 4th form for carrying out the present invention. FIG. 16 is a cross-sectional view taken along line 16-16 in FIG. 15; FIG. 17 is a sectional view taken along line 17-17 in FIG. 16; The top view of the 5th form for implementing this invention. FIG. 19 is a cross-sectional view taken along line 19-19 of FIG. Sectional drawing which follows the 20-20 line of FIG. The top view of the 6th form for carrying out the present invention. FIG. 22 is a sectional view taken along line 22-22 in FIG. 21; Sectional drawing which follows the 23-23 line of FIG. The top view of the 7th form for implementing this invention. FIG. 25 is a sectional view taken along line 25-25 in FIG. 24; FIG. 26 is a sectional view taken along line 26-26 in FIG. 25;

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E, 1F: blower,
2, 2A: case body, 3, 3A: shaft,
4, 4A, 4B: sleeve, 5: motor,
6: Upper impeller, 7: Lower impeller,
8: Base plate, 9: Screw,
10: Motor cover cylinder, 11: Lower impeller storage room,
12: Lower impeller storage wall, 13: Discharge port,
14: peripheral wall, 15: lower case,
16: Screw, 17: Air inlet,
18: Lower valve portion, 19: Lower valve recess,
20: Upper impeller storage wall, 21: Perimeter wall,
22: Upper impeller storage room, 23: Lower impeller storage wall,
24: central case, 25: air inlet,
26: Upper valve part, 27: Upper valve recessed part,
28: Upper impeller storage wall, 29: Through hole,
30: Partition wall 31, 31A: Upper case,
32: Screw, 33: Substrate,
34: Base plate, 35: Separation sleeve,
36, 36A, 36B: coupling means,
37: Coil, 38: Hub
39: Back yoke, 40: Rotor magnet,
41: York, 42: Boss part,
43: blade support plate, 44: blade plate,
45: Upper valve piece, 46: Upper cover plate,
47: Motor insertion cylinder, 48: Upper hub,
49: Recess, 50: Outer magnet,
51: Inner magnet, 52: Engaging recess,
53: engagement piece, 54: bearing recess,
55: Lower cover 56: Bearing recess,
57: Through hole, 58: Plate spring,
59, 59A, 59B, 59C: elastic body,
60: O-ring, 61: Rubber ring,
62: Coil spring.

Claims (2)

A motor having a shaft fixed to the case body, a sleeve rotatably attached to the shaft via a fluid dynamic pressure bearing, and two or more impellers fixed to the motor sleeve in two or more stages In the blower provided, two or more separation sleeves separated from each other so that the two or more impellers can be fixed to each other, and the two or more separation sleeves are integrated. A blower comprising: a coupling means coupled so as to rotate. Upper and lower sleeves supported on the upper and lower parts of the case body via elastic bodies, a shaft rotatably attached to the upper and lower sleeves via a fluid dynamic bearing, and attached to the shaft between the upper and lower sleeves And a motor body attached to the case body so as to rotationally drive the shaft.

Images