JP4758251B2 - Blower for duct - Google Patents

Description

  The present invention relates to a blower for a duct installed in a construction site, a contaminated area, or a disaster prevention area that discharges harmful air such as high-temperature air blown in a factory or polluted air generated due to natural phenomena or contaminated air for work.

  As a document related to this type of duct blower, which is mainly intended for cooling bearings and / or belts, for example, there is an “axial blower” disclosed in Japanese Patent Application Laid-Open No. 2003-293998 (referred to as document (1)). . The present invention includes a motor driving pulley provided above a cylindrical casing, a driven pulley of an impeller provided inside the cylindrical casing, and a belt equipped with the driving pulley and the driven pulley. A heat exhaust pipe that transmits rotational driving force to the driven pulley and communicates from the vicinity of the driven pulley of the belt cover to the outside of the cylindrical housing in the axial blower in which the driving pulley, the belt, and the driven pulley are covered with a belt cover. The belt cover is provided separately from at least the portion covering the belt, and the air used for cooling introduced into the belt cover is discharged from the exhaust heat pipe. The drive pulley, the belt and the driven pulley, and the bearing Intended to dissipate heat.

  In other fields, the following documents can be cited as inventions intended for cooling. There exists "the cooling fan structure in a pulley" of Unexamined-Japanese-Patent No. 9-177946 (it is set as literature (2)). In the present invention, the pulley includes a belt hooking portion on which a belt from the vehicle engine is fitted, a cylindrical portion disposed on the inner peripheral side of the belt hooking portion, and straddling between the belt hooking portion and the cylindrical portion, A torque transmission part is provided for connecting the two, the belt hooking part, the cylindrical part and the torque transmission part of the pulley are surrounded by an accommodation space, and a cooling fan having each blade is accommodated in the accommodation space, and the air blowing efficiency is increased. It is intended to provide a cooling fan structure in a pulley that is not degraded. Further, there is an “engine crank pulley” disclosed in Japanese Patent Application Laid-Open No. 2003-336722 (referred to as reference (3)). According to the present invention, an engine crank pulley projects from a chain cover and includes an outer peripheral surface of a hub portion fixed to a crankshaft shaft end and an inner peripheral surface of an annular pulley body portion on which a belt is fitted. The stopper member covers a part of the damper rubber, and intends to dissipate heat, prevent the temperature increase of the damper rubber, and deterioration based on this.

JP 2003-293998 A JP-A-9-177946 JP 2003-336722 A

  In the document (1), the exhaust heat pipe is provided separately from the portion of the belt cover covering the belt, and the air used for cooling introduced into the belt cover is discharged from the exhaust heat pipe. And the driven pulley and the structure for heat dissipation of the bearing. However, in the configuration of this document (1), the exhaust amount of the exhaust heat pipe is small with respect to the belt cover, and there is a problem in introducing outside air and / or cold air into the belt cover. Further, in the configuration equipped with a motor for introducing cold air, there are problems such as a complicated structure and an increase in cost and / or maintenance cost.

  Further, in the literature (2), since the cooling fan having each blade is accommodated and disposed in the accommodation space, the cooling effect can be expected. However, similar to the above-mentioned document (1), there may be problems such as an increase in cost and / or maintenance expenses. In addition, when the whole structure of this literature (2) is contrasted with this invention, it is thought that it cannot adopt structurally.

  Further, in Document (3), the stopper member is configured to dissipate heat by covering a part of the damper rubber. However, it is considered that a sufficient cooling effect cannot be expected by simply opening a part. In addition, when the heat dissipation structure of this literature (3) is contrasted with this invention, it is thought that it cannot adopt structurally.

The invention of claim 1 is intended to efficiently dissipate heat generated in the casing for the cover of the V-belt of the blower to protect the bearing, pulley, V-belt, etc. from high heat. The invention of claim 1 intends to achieve the object by a simple and simple method of a configuration in which a current plate is provided vertically in an existing casing. Further, the invention of claim 1 is to vertically install a rectifying plate in an existing casing, to propose a structure that allows effective use of a conventional blower and free selection, and to achieve this object. It is intended to provide a casing that is optimal for achieving this objective.

According to a first aspect of the present invention, a cylindrical wind tunnel, a fan pivotally supported on the wind tunnel, a driven pulley provided on a rotating shaft of the fan, a driven pulley, and an upper portion of the wind tunnel are arranged. A pulley on the driving side fixed to the output side of the motor, a V-belt suspended on the driven pulley and the driving pulley ,
A casing also serving as an air passage provided in the wind tunnel surrounding the driving pulley, the driving pulley and the V-belt, a rectifying plate provided vertically in the casing, and the rectifying plate in the casing. A first passage on the inlet side for partitioning and taking outside air between the rectifying plate and the V-belt, and a second passage on the outlet side for exhausting outside air introduced into the first passage out of the casing In the blower forming
The lower part of the casing is led to the lower part of the wind tunnel, and the current plate is disposed above and below the casing, and the first passage and the second passage are provided through the casing, This is a duct blower configured to allow outside air to move individually in the first passage and the second passage .

The invention of claim 1 includes a cylindrical wind tunnel, a fan pivotally supported by the wind tunnel, a driven pulley provided on the rotating shaft of the fan, a driven pulley, and a motor disposed above the wind tunnel. A drive-side pulley secured to the output side, a driven-side pulley and a drive-side pulley, and a V-belt suspended from the drive-side pulley ;
A casing also serving as an air passage provided in a wind tunnel surrounding the driving pulley, the driving pulley, and the V belt, a rectifying plate vertically provided in the casing, a rectifying plate partitioning the casing, and a rectifying plate; In a blower that forms a first passage on the inlet side that takes outside air between the V-belt and a second passage on the outlet side that exhausts outside air introduced into the first passage out of the casing ,
The lower part of the casing is led to the lower part of the wind tunnel, and the current plates are arranged above and below the casing, and the casing is provided with a first passage and a second passage, and the first passage and the second passage. Is a blower for ducts that allows the outside air to move individually .

Accordingly, the invention of claim 1 efficiently dissipates heat generated in the casing for the cover of the V-belt of the blower to the outside through the first passage and the second passage, and the bearing, pulley or V-belt. Etc. can be protected from high heat. The first aspect of the present invention has an advantage such that the object can be achieved by a simple and simple method in which a current plate is vertically provided in an existing casing. Further, the invention of claim 1 is to vertically install a rectifying plate in an existing casing, to propose a structure that allows effective use of a conventional blower and free selection, and to achieve this object. It has features such as providing an optimum casing.

  An example of the present invention will be described.

  Referring to the drawings, FIG. 1 is a schematic front view showing the first embodiment, FIG. 2 is a schematic front view showing the first embodiment, and FIGS. FIG. 4 is a side view of an essential part showing a second embodiment.

  First, the first embodiment shown in FIG. 1 will be described. In the figure, reference numeral 1 denotes a cylindrical wind tunnel (substantially cylindrical shape, substantially cylindrical shape with an annular flange). The fan 2 is pivotally supported via a support member 100. A driven pulley 3 is secured to a rotating shaft 200 that supports the fan 2. A motor 4 for driving the fan 2 is secured to the upper portion 1 a of the wind tunnel 1, and a driving side pulley 6 is secured to the motor 4 on the output shaft 400. A V belt 7 is suspended between the driven pulley 3 and the driving pulley 6. This V-belt 7 is provided with a concavo-convex shape 700 to ensure that it is securely attached to the driven pulley 3 and the driving pulley 6, to ensure quietness, to improve its durability and locking relationship, or to air Features for guiding A cover body 101 is provided for opening and closing substantially the entire side surface of the wind tunnel 1. A structure useful for cleaning, replacement, and repair of the fan 2, the rotary shaft 200, etc. by opening the cover body 101. It has become.

  The driven pulley 3, the driving pulley 6, and the V-belt 7 are surrounded in a substantially sealed manner by a casing 8 provided on the column 100 a of the support member 100. Therefore, foreign matter such as dust and hot air does not enter the casing 8.

  In addition, a current plate 10 is provided vertically in the casing 8, the inside of the casing 8 is partitioned by the current plate 10, and a first passage 12 on the inlet side for taking outside air between the current plate 10 and the V belt 7 is provided. The second passage 13 on the outlet side for exhausting outside air introduced into the first passage 12 to the outside of the casing 8 is formed. Therefore, when the V-belt 7 slides through the rotation of the pulley 6 on the driving side, the movement of the air in the first passage 12 and the second passage 13 is imparted with the sliding of the V-belt 7, and The air in the first passage 12 is attracted in the direction of the arrow “A” through the partition by the current plate 10, and the air in the second passage 13 is attracted in the direction of the arrow “B”.

  The concave / convex shape 700 of the V-belt 7 is effective for the attraction of air. For example, the posture of taking in air by the concave portion 700a is secured, and the flow of air is secured by the movement of the concave portion 700a. It becomes possible. The air flow through the concave portion 700a is generated in the first passage 12 and the second passage 13, and becomes the flow in the arrow "I" direction and the arrow "B" direction. Using the flow in the directions of the arrows “I” and “B”, the outside air is taken into the casing 8 and the hot air in the casing 8 is exhausted outside the apparatus. By taking in the outside air, the driven pulley 3, the driving pulley 6 and the V-belt 7, the bearings and the like are cooled, and these are protected from hot air (hot air) and the hot air in the casing 8 is exhausted. The purpose of this is to protect the driven pulley 3, the driving pulley 6 and the V-belt 7, bearings and the like from hot air. As a result of the experiment, such an air flow and / or effect could be confirmed.

  The second embodiment shown in FIG. 2 will be described. In this example, the first passage 12 and the second passage 13 are provided with the casing 8 up to 1 b below the wind tunnel 1. Therefore, the intake ports 15 (multiple through holes) and / or the exhaust ports 16 (multiple through holes) for the first passage 12 and the second passage 13 are provided on the upper 1a side and the lower 1b side of the wind tunnel 1. The air flow and / or effects are the same as in the above example. Then, by providing the intake port 15 and / or the exhaust port 16 on the upper 1a side and the lower 1b side, it is effective for exhausting hot air and / or taking outside air. As shown in the figure, the intake port 15 and / or the exhaust port 16 are provided as a pair on the upper 1a side and the lower 1b side. However, it is also possible to provide the intake port 15 and / or the exhaust port 16 on the upper 1a side and the lower 1b side. It is. In this example, the intake port 15 and / or the exhaust port 16 on the lower 1b side is in an open state because there is little danger. This state is effective for exhausting hot air and / or taking outside air.

  Further, another example of the rectifying plate 10 shown in FIGS. 3-1 and 3-2 will be described. Guide-shaped guide pieces 10a and 10b (derivatives) for guiding are formed on the upper end (upper side) of the rectifying plate 10. The effects of the first passage 12 and / or the second passage 13 are exhibited. Similarly, guide-shaped guide pieces 10c and 10d (derivatives) for guiding are formed at the lower end (downward) of the current plate 10, and the effects of the first passage 12 and / or the second passage 13 are exhibited.

  Although not shown, the driven pulley 3 and / or the driving pulley 6 may be provided with heat radiating means having an increased surface area such as irregularities and ring ridges, or wind generating means such as a stirring blade and a stirring sleeve. Yes, expansion of the effect of the present invention can be expected. An example of the wind generating means will be described. A magnet fan 20 is attached to the casing 8 shown in FIG. 4 so as not to contact the driving pulley 6 and / or the driven pulley 3. It is desirable to secure a positive wind flow in the first passage 12 and / or the second passage 13 by generating wind in the casing 8 by using it. In this example, since the magnet fan 20 is attached to the casing 8, the magnet fan 20 can be used for a conventional duct blower, so that it is useful, and resources can be effectively used. Furthermore, since it can be installed as needed, there is a feature that can be expected to expand the application field.

FIG. 1 is a schematic front view showing the first embodiment. FIG. 2 is a schematic front view showing the first embodiment. 3-1 is a front view showing another example of the current plate 3-2 is a front view showing still another example of the current plate FIG. 4 is a side view of the main part showing the second embodiment.

DESCRIPTION OF SYMBOLS 1 Wind tunnel 1a Upper 1b Lower 100 Mounting member 100a Pillar body 2 Fan 200 Rotating shaft 3 Driven pulley 4 Motor 400 Output shaft 6 Driven pulley 7 V belt 700 Uneven shape 8 Casing 10 Current plate 10a-10d Guide piece 200 Rotating shaft 12 First passage 13 Second passage 15 Intake port 16 Exhaust port 20 Magnet fan

Claims (1)

A cylindrical wind tunnel, a fan pivotally supported on the wind tunnel, a driven pulley provided on the rotating shaft of the fan, a driven pulley, and an output side of a motor disposed on the upper portion of the wind tunnel A pulley on the driving side fixed to the pulley, a V-belt suspended between the driven pulley and the driving pulley ,
A casing also serving as an air passage provided in the wind tunnel surrounding the driving pulley, the driving pulley and the V-belt, a rectifying plate provided vertically in the casing, and the rectifying plate in the casing. A first passage on the inlet side for partitioning and taking outside air between the rectifying plate and the V-belt, and a second passage on the outlet side for exhausting outside air introduced into the first passage out of the casing In the blower forming
The lower part of the casing is led to the lower part of the wind tunnel, and the current plate is disposed above and below the casing, and the first passage and the second passage are provided through the casing, A blower for a duct configured to allow outside air to move individually in the first passage and the second passage .

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