blower

Abstract

To provide a blower equipped with sealing means constituted by combining a seal plate, a seal material, and / or a second seal plate.SOLUTION: A blower A comprises a first casing unit 1, second casing units 2a and 2b provided on the first casing unit, a rotating shaft 21 inserted into a through hole opened in the second casing units, and an impeller 11 fixed to the rotating shaft, and provided in the first casing unit. The blower is equipped with sealing means constituted in such a manner that one end of a first seal plate is supported by the second casing units, the other end thereof is provided on a boss or a collar provided on the rotating shaft, and a second seal plate is provided between an end surface of the boss or the collar and a step of the rotating shaft.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blower equipped with a sealing means. [Background technology]

[0002] As is well known, there are various demands and requirements for this type of blower.

[0003] For example, in the structure of a sealing plate (sealing device) that is loosely fitted onto the boss of the rotating shaft and is provided in the second casing unit, the purpose is to prevent dust, moisture, etc. that leaks from the gap with the boss from entering the motor bearing, thereby avoiding malfunctions, etc.

[0004] In some cases, a combined sealing device is employed in this type of bearing sealing device.

[0005] The following related inventions are included in the prior art: 1) The device in Japanese Utility Model Application Laid-Open Publication No. 1-142598 is a structure that provides a pair of flingers on the bearing holder of the fan casing to prevent lubricant leakage and dust intrusion. However, this device is simply a pair of flingers and is not considered to perform a sufficient function. 2) The invention in JP 8-168202 A is a bearing mechanism that consists of a collar fixed to the shaft, a housing, an inclined seal, a spiral seal, and an oil-resist plate, and the lubricating oil is pushed out from the bearing. The collar on the pushing side is designed to use centrifugal force to send the lubricating oil discharged from the bearing to the housing side and then discharge it from an outlet at the bottom of the bearing, and the structure is disclosed to prevent lubricant leakage and dust intrusion through the collar. However, it is not considered to function sufficiently as a seal. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 1-142598 [Patent Document 2] Japanese Patent Application Publication No. 8-168202 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above, the present invention aims to provide a blower equipped with a sealing means that can be suitably combined, consisting of a first sealing plate, a collar, and / or a V-ring provided on the collar, and a second sealing plate provided in the space between the step between the collar and the rotating shaft.

[0008] Furthermore, the present invention provides a structure in which a collar is provided in a cut portion (space) formed in the main body of a boss attached to the rotating shaft of a motor, and a V-ring is arranged in this collar, thereby enhancing the sealing effect and ensuring the same function as conventional bosses, while also achieving the same specifications. [Means for solving the problem]

[0009] In order to achieve the above-mentioned intentions of the present invention, claims 1 to 6 are provided. [Effects of the Invention]

[0010] Claim 1 states: a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotating shaft; a collar loosely fitted on the outer circumferential surface of the rotating shaft; On the axis of rotation Through the boss an impeller fixedly mounted within a first casing unit, The first seal plate has one end supported by the second casing unit and the other end , Bo or color Direction hair, A second seal plate is provided between the end face of the boss or collar and the step of the rotary shaft, First seal plate Feather Neguruma Inner circumference One end and directly Opposite The part of the boss that supports the impeller faces the impeller. do, The blower is provided with a sealing means.

[0011] Therefore, the invention of claim 1 provides a blower equipped with a sealing means consisting of a combination of a first seal plate and / or a second seal plate, and also aims to prevent dust, moisture, etc. from entering the bearing interior and to prevent malfunctions, etc.

[0012] In claim 2, a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotating shaft; a collar loosely fitted on the outer circumferential surface of the rotating shaft; On the axis of rotation Through the boss an impeller fixedly mounted within a first casing unit, The first seal plate has one end supported by the second casing unit and the other end , Bo or color Direction hair, A second seal plate is provided between the boss or collar end face and the step of the rotating shaft, A V-ring is provided on the collar. First seal plate Feather Neguruma Inner circumference One end and directly Opposite The part of the boss that supports the impeller faces the impeller. do, The blower is provided with a sealing means.

[0013] Therefore, the invention of claim 2 is an invention that is effective in achieving the object of claim 1. The same applies below, and further explanation is omitted.

[0014] In claim 3, a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotating shaft; a collar loosely fitted on the outer circumferential surface of the rotating shaft; On the axis of rotation Through the boss an impeller fixedly mounted within a first casing unit, The first seal plate has one end supported by the second casing unit and the other end , Bo or color Direction hair, A second seal plate is provided between the boss or collar end face and the step of the rotating shaft, No. 1 seal plate a flexible sealing material is provided on the First seal plate Feather Neguruma Inner circumference One end and directly Opposite The part of the boss that supports the impeller faces the impeller. do, The blower is provided with a sealing means.

[0015] In claim 4, This blower is equipped with a sealing means in which the first and second seal plates are made of metal.

[0016] In claim 5, The other end of the first seal plate is connected to the second seal plate. The outer edge that does not come into contact with the collar or rotating shaft Therefore, this blower is provided with a sealing means located on the rotary shaft side.

[0017] In claim 6, This blower is provided with a sealing means that forms a gap between the outer peripheral surface of the collar and the inner peripheral surface of the first seal plate. [Brief explanation of the drawings]

[0018] [Figure 1] Scaled side view of an example blower [Figure 2] Front view of Figure 1 [Figure 3] 1 is a partially cutaway cross-sectional view of a main part of the first embodiment; [Figure 4]A partially cutaway cross-sectional view of the main part of the second embodiment [Figure 5] A partially cutaway cross-sectional view of the main part of the third embodiment [Figure 6] A partially cutaway cross-sectional view of the main part of the fourth embodiment [Figure 7] A cross-sectional view of a part of a conventional embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Each embodiment of the present invention will be described below. Each embodiment is a preferred example and is not limited to the description and / or drawings of each embodiment. Therefore, structures that partially change the configuration within the scope of the spirit of the invention, or structures that can achieve the same features and effects, etc., are within the scope of the present invention.

[0020] FIG. 1 or 2 shows the overall structure of blower A. The casing housing impeller (fan) 11 is composed of a first casing unit 1 forming the outer casing and a pair of annular second casing units 2a and 2b that close the annular space inside the first casing unit 1. The second casing unit 2a is equipped with a motor 20 that drives impeller 11 (described below). The motor 20 is provided with a rotating shaft 21, whose tip 21a faces a central portion 101 of the second casing units 2a and 2b (casings). The impeller 11 is journaled in this central portion 101. The rotating shaft 21 is inserted into a through-hole 200 in the second casing unit 2a. Reference numeral 8 in the drawings denotes a suction flange provided on the second casing unit 2b side.

[0021] In a blower A having this structure, for example, the impeller 11 rotates when the rotating shaft 21 is driven to rotate, and the air, gas, and other gases sucked in through the intake port (air intake port) of the casing are exhausted to the outside through the discharge port (blowout port).

[0022] 3 shows a first embodiment in which a boss 22 is fitted onto the shaft tip 21a of a rotating shaft 21, and this fitted state is secured by a screw 24. The boss 22 is made up of a short main body 22a and a flange 22b provided on the main body 22a. With the boss 22 fitted onto the shaft tip 21a of the rotating shaft 21, a space H1 into which a collar 4 can be inserted is formed between the shaft body 21f of the rotating shaft 21 and an end face (no reference number, the end face of the main body 22a on the motor side) of the main body 22a. The collar 4 is inserted into this space H1, and is loosely fitted onto the outer peripheral surface 21d of the rotating shaft 21.

[0023] However, the outer peripheral surface 40 of the collar 4 is lower than the outer peripheral surface 22a1 of the main body portion 22a, and for example, the thickness relationship is collar 4<main body portion 22a.

[0024] That is, the outer peripheral surface 40 of the collar 4 is positioned lower than the outer peripheral surface 22a1 of the main body 22a (lower with respect to the axis 21e of the rotating shaft 21). This structure is effective in reducing costs, facilitating processing, and reducing weight.

[0025] Rotating shaft 21 is composed of, in order from the motor 20 side to the impeller 11 side, a thick-diameter shaft main body 21f, a thin-diameter shaft base portion 21b, and a shaft tip portion 21a, with a step 21c between shaft main body 21f and shaft base portion 21b. Collar 4 is provided in space H1 formed between base end side 22a1a of main body portion 22a of boss 22 and step 21c between shaft main body 21f and shaft base portion 21b. Collar 4 is loosely fitted onto outer peripheral surface 21d of rotating shaft 21.

[0026] In this example, the collar 4 and the main body 22a constitute the main body 022a of the conventional boss 022. In this structure, for example, a structure in which the thickness of the collar 4 is thin, as in this example, is effective in reducing costs, facilitating processing, and reducing weight.

[0027] As described above, the first seal plate 5 is provided between the step 21c of the rotary shaft 21 and the end face of the main body 22a of the boss 22. A gap B is formed between the inner peripheral surface 50 of the first seal plate 5 and the outer peripheral surface 40 of the collar 4. The function of this gap B is to prevent the inner peripheral end 5c (other end 5b) of the first seal plate 5 from contacting the outer peripheral surface 40 of the collar 4. This serves, for example, to prevent wear and ensure durability of the first seal plate 5 and prevent the generation of abnormal noise. Furthermore, minimizing the gap B also serves to prevent air leakage and eliminate waste of the drawn air (effective utilization and efficiency of the drawn air, etc.) (not limited to this; the same applies below). One end 5a of the first seal plate 5 is supported by the second casing unit 2a, and the other end 5b forms a gap B with the outer peripheral surface 40 of the collar 4 (the thin-walled outer peripheral surface of the main body 22a).

[0028] A disk-shaped second seal plate 6 is sandwiched (attached) between one end 4a of the base end side 41 (motor 20 side) of the collar 4 and the step 21c of the rotary shaft 21. In other words, assembly can be done with one touch, reliably and easily. The role of this second seal plate 6 is to prevent, for example, the outflow of dust and other particles from inside the first casing unit 1 (casing).

[0029] In this first embodiment, the first sealing plate 5 and / or the second sealing plate 6 function to prevent dust, moisture, etc. leaking through the gap with the boss from entering the motor bearing, thereby avoiding malfunctions, etc. Alternatively, the first sealing plate 5 and / or the second sealing plate 6 function to prevent dust, etc. from entering the casing and / or secondarily the first casing unit 1 (casing, hereafter omitted) and to prevent intake air from leaking.

[0030] In the figure, reference numeral 7 denotes a key, which fixes a rotary shaft 21 and a boss 22. This key 7 is shorter than the conventional key 07.

[0031] 4 shows a second embodiment, the basic structure of which is similar to that of the first embodiment. The second embodiment is characterized by a disk-shaped V-ring 10 (sealing material, the same applies hereinafter) made of flexible material such as rubber, fitted onto the outer circumferential surface 40 of the collar 4, with its main body 1000 located on the boss 22 side of the collar 4 and its lip 1001 located on the motor 20 side. Therefore, in the second embodiment, the first seal plate 5, which is a metal bulkhead plate attached to the second casing unit 2a, the V-ring 10, and / or the second seal plate 6 function to prevent, for example, dust and other particles from entering the first casing unit 1 and to prevent intake air from leaking.

[0032] The collar 4 allows at least the V ring 10 and / or the second seal plate 6 to be attached, and facilitates attachment. In addition, in this second embodiment, the lip 1001 of the V ring 10 is structured so as not to contact one surface (the impeller 11 side) of the first seal plate 5. The non-contact structure is effective, for example, in reducing wear of the V ring 10, ensuring durability, and preventing abnormal noise, but this is just one example and is not limiting. In addition, the first seal plate 5 is a metal partition plate, but this is just one example.

[0033] FIG. 5 shows a third embodiment, the basic structure of which is similar to that of the first and second embodiments. The structural features of this third embodiment are as follows: In this example, the relationship between the V ring 10 and the first seal plate 5, a metal partition plate attached to the second casing unit 2a, is such that the lip 1001 of the V ring 10 contacts one surface (the impeller 11 side) of the first seal plate 5. The effects and basic structure are similar to those of the first and second embodiments. In addition, in a structure in which the lip 1001 contacts one surface of the first seal plate 5, as in this third embodiment, the illustrated mounting structure of the V ring 10 is optimal, and it also provides improved watertightness, prevention of dust and other particles from entering the first casing unit 1, prevention of intake air leakage, and prevention of abnormal noise, as previously mentioned. The first seal plate 5 is a metal partition plate, but this is by way of example and is not limiting.

[0034] FIG. 6 shows the fourth embodiment, whose basic structure is similar to that of the first to third embodiments. The fourth embodiment features a first sealing plate 5, a metal partition plate, attached to the second casing unit 2a, and a flexible sealing member 12 attached to the end of the first sealing plate 5. In this fourth embodiment, the free end 1200 of the flexible sealing member 12 attached to the end of the first sealing plate 5 is bent and contacts the outer peripheral surface 40 of the collar 4. Therefore, in the fourth embodiment, the first sealing plate 5, the flexible sealing member 12, and / or the second sealing plate 6 (foreign matter scattering auxiliary plate) function to prevent, for example, the intrusion of dust and other particles into the first casing unit 1 and the leakage of suction air, as described above. The rest of the structure is similar to that of the first and second embodiments. In addition, in the fourth embodiment, as described above, the free end side 1200 of the flexible sealing material 12 is bent and brought into contact with the outer peripheral surface 40 of the collar 4.

[0035] The flexible seal 12 is attached to the inner disk portion 5d of the disk-shaped first seal plate 5 (the inner disk portion 5d of the fourth embodiment is shorter than the portion corresponding to the inner disk portion 5d of the other embodiments), but this is just one example and is not limiting. The first seal plate 5 is a metal partition plate, but this is just one example. In the fourth embodiment, the flexible seal 12 is easy to replace. In this example, the first seal plate 5 and / or the flexible seal 12 are attached with fasteners 13 and 14, respectively.

[0036] The V-ring 10 may be a commercially available V-ring, such as a V-30A or V-25A standard V-ring, but is not limited to these.

[0037] FIG. 7 is a partially cutaway cross-sectional view of the essential parts of one embodiment of a conventional blower, and although reference numerals are omitted, it shows the conventional key 07 and its longitudinal dimensions. The dimensional relationship of key 7 is < that of the conventional key 07. Also, main body 22a is < that of the conventional main body 022a. Also, a first seal plate 05, which functions in substantially the same way as the first seal plate 5, is provided in the conventional second casing unit 02a (casing). Also, a gap 0B is provided.

[0038] The above-described embodiments are preferred examples. Within the spirit and scope of the embodiments, structures that partially change the configuration, or structures that can achieve the same features and effects, are also within the scope of the present invention. [Explanation of symbols]

[0039] A Blower B Gap 0B Gap H1 space 1. First casing unit 101 Central part 11 Impeller 2a, 2b Second casing unit 02a Conventional second casing unit 200 through holes 20 Motor 21 Rotation axis 21a Shaft tip 21b Shaft base 21c step 21d Outer surface 21e Axis center 21f shaft body 22 Boss 022 Boss 22a Main body 022a ​​Main body 22a1 Outer surface 22a1a Base end side 22b Tsuba piece 24 screws 3 Stand 4 colors 4a one end 40 Outer surface 41 Base end 42 Tip side 5 First seal plate 05 First seal plate 5a one end 5b other end 5c Inner edge 5d Inner disc 50 Inner surface 6 Second sealing plate (foreign matter scattering support plate) 7 Key 07 Key 8 Suction flange 10 V-ring 1000 Main unit 1001 Lip 12 Flexible sealing material 1200 Free end side 13 Fasteners 14 Fasteners

Claims

1. a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotary shaft; a collar loosely fitted on the outer circumferential surface of the rotary shaft; an impeller fixed to the rotary shaft via the boss and provided in the first casing unit, a first seal plate having one end supported by the second casing unit and the other end directed toward the boss or the collar; a second seal plate is provided between the end face of the boss or the collar and a step of the rotary shaft; the first seal plate directly faces one end of the impeller on the inner circumferential side, and faces a portion of the boss that supports the impeller, with the impeller in between; A blower equipped with a sealing means.

2. a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotary shaft; a collar loosely fitted on the outer circumferential surface of the rotary shaft; an impeller fixed to the rotary shaft via the boss and provided in the first casing unit, a first seal plate having one end supported by the second casing unit and the other end directed toward the boss or the collar; a second seal plate is provided between the end face of the boss or the collar and a step of the rotary shaft; A V-ring is provided on the collar, the first seal plate directly faces one end of the impeller on the inner circumferential side, and faces a portion of the boss that supports the impeller, with the impeller in between; A blower equipped with a sealing means.

3. a first casing unit; a second casing unit provided in the first casing unit; a rotating shaft inserted into a through hole formed in the second casing unit; a boss fitted onto the tip of the rotary shaft; a collar loosely fitted on the outer circumferential surface of the rotary shaft; an impeller fixed to the rotary shaft via the boss and provided in the first casing unit, a first seal plate having one end supported by the second casing unit and the other end directed toward the boss or the collar; a second seal plate is provided between the end face of the boss or the collar and a step of the rotary shaft; a flexible seal material is provided on the first seal plate; the first seal plate directly faces one end of the impeller on the inner circumferential side, and faces a portion of the boss that supports the impeller, with the impeller in between; A blower equipped with a sealing means.

4. 4. The blower equipped with the sealing means according to claim 1, wherein the first and second seal plates are made of a metal material.

5. 2. The blower equipped with a sealing means according to claim 1, wherein the other end of the first seal plate is positioned closer to the rotary shaft than the outer peripheral end of the second seal plate that does not contact the collar or the rotary shaft.

6. 6. A blower equipped with the sealing means according to claim 1, wherein a gap is formed between the outer peripheral surface of the collar and the inner peripheral surface of the first seal plate.

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