JP6362361B2 - Blower - 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.

  A literature on the internal air cooling (cooling) of the guard of this type of blower (axial blower, duct, etc.). For example, it is installed from the inside of the casing (housing) to the outside in the cover provided from the top to the bottom. In the blower (axial fan, duct, etc.) comprising the motor and the driving pulley, and the driven pulley connected to the driving pulley via a belt, and the impeller built in the casing, There is an invention in which outside air is introduced, this internal air cooling is performed, and the driving pulley, the belt, and the driven pulley, which are housed in the guard, are mainly air-cooled (air cooling in combination with a cooling fan). For example, there are JP-A-2007-232102 (referred to as reference 1) and JP-A-2003-293998 (referred to as reference 2).

  Further, in the literature relating to air cooling of the boss portion of the shaft provided in a part of the apparatus, for example, a passage established in the axial direction of the boss portion and a cooling fan for sending cooling air to the passage are configured. However, there is an invention in which the hub portion (bearing and shaft, bearing, etc.) is cooled with this air. For example, there are JP 2009-257337 A (reference 3), JP 2003-293777 A (reference 4), and JP 2013-185472 A (reference 5).

Japanese Patent Laid-Open No. 2007-232102 JP 2003-293998 A JP 2009-257337 A JP 2003-293777 A JP 2013-185472 A

  In the documents 1 and 2, the outside air is introduced from the upper side of the belt cover to the lower side, the pulley on the driven side (fan side), the lower side of the belt is cooled, and the hot air is smoothly supplied. Exhaust, etc. are not considered sufficient.

  Moreover, in the said literatures 3-5, although the outside air (air cooling) channel | path is formed in the circumference | surroundings of an axis | shaft, it is the structure which forms the space of this outside air channel | path large, and there exists a possibility that an adoption range may be narrowed, Improvements such as the fact that the air cooling effect cannot always be expected are conceivable.

The present invention provides claims 1 to 8 in order to solve the problems of the documents 1 to 5.

The blower of claim 1 is driven by a belt wound around a driving pulley on the motor side provided outside the cylindrical wind tunnel and a driven pulley on the impeller side provided inside the wind tunnel. In a blower that transmits rotational power to the side pulley and covers the driving pulley, belt, and driven pulley with a cover,
A partition plate is provided on the cover so that the outside air introduced from the intake port of the cover is guided to the boss part of the impeller, reaches the drive pulley from the driven pulley, and can be exhausted from the exhaust port of the cover. With configuration,
In the boss portion of the impeller, a region that allows passage of outside air is formed, and a fan that is synchronized with the impeller is provided in the region, so that the outside air can pass through the boss portion.

The blower according to claim 2 is configured such that the partition plate is provided in the vertical direction of the cover, and is provided so as to conceal the driving pulley, and is provided to the immediate vicinity of the driven pulley.

In the blower of claim 3 , the partition plate is suspended from the ceiling surface of the cover to form an intake passage and an exhaust passage, and a connection passage is provided between the bottom end of the partition plate and the inner bottom surface of the cover. It is the structure which forms and connects an intake passage and an exhaust passage.

According to a fourth aspect of the present invention, the drive side pulley and the driven side pulley are disposed in the exhaust passage, and an exhaust port communicating with the outside air is provided in the upper portion of the exhaust passage, and the outside air is provided in the upper portion of the intake passage. It is the structure which provides the inlet port which leads.

The blower of claim 5 is configured such that the opening area of the intake port of the intake passage and the opening area of the connection passage are substantially the same or the same.

According to a sixth aspect of the present invention, the region includes an annular passage formed in the axial direction of the boss portion provided on the support shaft that supports the impeller, and the annular passage is connected to the intake passage and the exhaust passage.

According to a seventh aspect of the present invention , the region includes an annular passage formed in the axial direction of the boss portion, the annular passage is connected to the intake passage and the exhaust passage, and a room is formed in the annular passage. In this configuration, a fan synchronized with the impeller is provided in the room.

The blower according to claim 8 is configured such that the room is closed with a shielding plate.

The present invention proposes claim 1 and claims 2 to 4 , so that the configuration not in literatures 1 and 2, that is, the outside air introduced into the cover from the intake port is introduced to the boss portion of the impeller. In this configuration, the air can be exhausted from the exhaust port of the cover after being guided and guided from the driven pulley to the driving pulley. At least the driven / drive pulley, the belt, the boss, the shaft, and the bearing are air-cooled with outside air.

Further, the present invention proposes claim 1 and claims 2 to 8 , so that a configuration not included in documents 3 to 5, that is, a region through which the outside air passes directly to the boss portion of the impeller (annular) (Passage) is formed. The outside air efficiently cools the driven / drive pulley and belt, as well as the boss, shaft, and bearing. Furthermore, it is the structure which installs the fan for cooling in this area | region (room), and expands the air cooling effects, such as a boss | hub part and a shaft.

Front view of the first embodiment of the present invention Sectional drawing which lacked the front side of the cover of 1st Example of this invention 1 is a left sectional view of FIG. Sectional drawing which lacked the front side of the cover of 2nd Example of this invention Sectional drawing which looked at an example of the boss | hub part of 2nd Example of this invention from the front The expanded sectional view which looked at the left side of an example of the boss | hub part of 3rd Example of this invention Sectional drawing which lacked the front side of the cover of 3rd Example of this invention Sectional drawing seen from the front of another example of the boss | hub part of 3rd Example of this invention The expanded sectional view which looked at the left side of another example of the boss | hub part of 3rd Example of this invention

  Hereinafter, preferred embodiments of the present invention will be described.

  In FIG. 1 to FIG. 3, reference numeral 1 is a wind tunnel of a cylindrical shape (a shape such as a cylindrical shape provided with annular flanges at both ends, but is not limited to this cylindrical shape). It is installed between ducts (not shown) installed in construction sites, contaminated areas and disaster prevention areas. A prismatic cover 2 is suspended from the wind tunnel 1, and an upper part 2 a of the cover 2 is outside the wind tunnel 1, and a lower part reaches a substantially center of the wind tunnel 1. An intake port 3 is provided above the front side 2-1 of the cover 2, and an exhaust port 5 is provided above the back side 2-2. The cover 2 is provided with a partition plate 6 so as to form an intake passage A and an exhaust passage B, and a connection passage C that connects the intake passage A and the exhaust passage B is formed. The connection passage C is a gap between the hanging end 6 a of the partition plate 6 and the inner bottom surface of the lower portion 2 b of the cover 2. The opening area of the connecting passage C (gap) and the opening area of the intake passage A are the same or substantially the same, and a structure that can ensure a smooth suction of the outside air (cold air) and a flow in the cover 2 is obtained. . In this connection passage C, outside air is guided from the intake passage A to the exhaust passage B. The partition plate 6 shields the driving pulley 11. That is, it is a structure that shields the outside air introduced from the suction port 3 and guides it to the intake passage A.

  An exhaust port 5 is provided in the exhaust passage B in the cover 2, and air (hot air) that has become warm air is exhausted to the outside in the exhaust passage B.

  A drive-side pulley 11 secured to the output shaft 10a of the drive motor 10 disposed on the outer peripheral surface 1a (outer peripheral upper surface) of the wind tunnel 1 is provided in the exhaust passage B above the cover 2. A driven pulley 13 secured to the shaft 12a of the impeller 12 installed in the interior 1b of the wind tunnel 1 is provided in the exhaust passage B below the cover 2b. The shaft 12a is supported by a boss 15 of a bearing provided outside the lower portion 2b of the cover 2. Reference numeral 16 denotes a belt suspended from the driving pulley 11 and the driven pulley 13 and is located in the exhaust passage B of the cover 2. In the figure, reference numeral 17 denotes a bearing, 18 denotes a hub of the impeller 12, and 19 denotes an outside air suction fan provided in the output shaft 10a provided in the intake port 3.

  The boss portion 15 is provided with a region 20 that allows passage of outside air as shown in the second and third embodiments. The region 20 in the second embodiment includes a plurality of strip-shaped intake holes 20a provided in the axial direction (the dimensions and shape of the holes are not limited), a plurality of strip-shaped exhaust holes 20b connected to the intake holes 20a, It is formed by a room 21 that connects the intake hole 20a and the exhaust hole 20b, and a shielding plate 22 that closes the room 21. The room 21 can be structured to be installed in the boss portion 15. In this region 20, a part of the outside air that has flowed through the connecting passage C flows so as to detour. This outside air enters through the intake hole 20a, reaches the room 21 while cooling the shaft 12a, makes a U-turn, flows through the exhaust hole 20b, and then enters the exhaust passage B, thereby cooling the boss 15 by air. Structure. The intake hole 20a and the exhaust hole 20b form a platter pattern, the intake hole 20a is close to the shaft 12a, and the exhaust hole 20b is separated from the shaft 12. It is also possible to plan. In the figure, reference numeral 23 denotes a fan provided on the shaft 12 a and is provided in the room 21. Using this fan 23, the outside air is guided to the intake hole 20a and sent to the exhaust hole 20b. Further, in the third embodiment, the region 20 has a structure in which an intake hole 20a and an exhaust hole 20b are provided adjacent to the boss portion 15, and the rest is in accordance with the second embodiment. In the third embodiment, the air intake holes 20a and the exhaust holes 20b have a mesh pattern, and a further improvement in the air cooling effect can be expected as compared with the second embodiment.

  Next, the flow of outside air and air cooling using this outside air will be described. In the first embodiment, the air is drawn into the intake passage A from the suction port 3 by the suction force of the fan 19, and then hangs down along the partition plate 6 to reach the connection passage C (lower 2 b of the cover 2). . Thereafter, the exhaust passage B is reached from the connection passage C. At that time, first, the driven pulley 13 is air-cooled, and then the outside air rises along the back side 2-2 of the cover 2 to cool the belt 16 upward from the lower side. The outside air is heated up somewhat, but the air cooling effect is sustained. Finally, it reaches the upper side of the exhaust passage B (upper 2a of the cover 2) and air-cools the driving pulley 11 while It reaches the exhaust port 5 and is exhausted to the outside as it is. Further, in the second embodiment, being guided from the intake passage A to the connecting passage C is the same as in the first embodiment. Thereafter, the outside air reaches the exhaust hole 20b through the room 21 from the intake hole 20a provided in the boss portion 15 by the suction force of the fan 23 in the room 21. That is, the air flows through the region 20 of the boss portion 15, and the boss portion 15, the shaft 12a, the bearing 17, the hub 18 and the like are air-cooled. Then, it reaches the exhaust passage B via the exhaust hole 20b. Thereafter, the flow of outside air follows that of the first embodiment. Further, in the third embodiment, being guided from the intake passage A to the connecting passage C is the same as in the first embodiment. Thereafter, the outside air reaches the adjacent exhaust hole 20b through the room 21 from the intake hole 20a provided in the boss portion 15 by the suction force of the fan 23 in the room 21. That is, it flows through the region 20 of the boss portion 15, and the boss portion 15, the shaft 12a, the bearing 17, the hub 18 and the like are efficiently air-cooled. Then, it reaches the exhaust passage B via the exhaust hole 20b. Thereafter, the flow of outside air follows that of the first embodiment.

  The structure of each embodiment described above is a description of a preferred example of the present invention. Therefore, the present invention is not limited to the above-described embodiments, and a structure in which a part of the configuration is changed within the scope of the invention, a structure that can achieve the same features and effects, and the like are included in the scope of the present invention. It is.

DESCRIPTION OF SYMBOLS 1 Wind tunnel 1a Outer peripheral surface 1b Inside 2 Cover 2a Upper 2b Lower 2-1 Front side 2-2 Rear side 3 Intake port 5 Exhaust port 6 Partition plate 6a Hanging bottom 10 Motor 10a Output shaft 11 Drive side pulley 12 Impeller 12a shaft 13 Driven Pulley 15 Boss 16 Belt 17 Bearing 18 Hub 19 Fan 20 Area 20a Intake Hole 20b Exhaust Hole 21 Room 22 Shielding Plate 23 Fan A Intake Passage B Exhaust Passage C Connection Passage

Claims (8)

Rotational power is applied to the driven pulley via a belt wound around a driving pulley on the motor side provided outside the cylindrical wind tunnel and a driven pulley on the impeller side provided inside the wind tunnel. In the blower in which the driving pulley, the belt, and the driven pulley are covered with a cover,
A partition plate is provided on the cover, and the outside air introduced from the intake port of the cover is guided to the boss portion of the impeller, and reaches the driving pulley from the driven pulley, and then the exhaust of the cover It is configured to allow exhaust through the mouth,
A fan that allows passage of the outside air is formed in the boss portion of the impeller, and a fan that is synchronized with the impeller is provided in this region, so that the outside air can pass through the boss portion. . 2. The blower according to claim 1, wherein the partition plate is provided in a vertical direction of the cover and is provided so as to conceal the drive side pulley, and is provided to the immediate vicinity of the driven side pulley. The partition plate is suspended from the ceiling surface of the cover to form an intake passage and an exhaust passage, and a connection passage is formed between the bottom end of the partition plate and the inner bottom surface of the cover, The blower according to claim 1, wherein the intake passage and the exhaust passage are connected to each other. The driving pulley and the driven pulley are arranged in the exhaust passage, the exhaust passage communicating with the outside air is provided in the upper portion of the exhaust passage, and the outside air communicates with the upper portion of the intake passage. The blower according to claim 3 , wherein the air inlet is provided. The blower according to claim 3 , wherein the opening area of the intake port of the intake passage and the opening area of the connection passage are substantially the same or the same. The area comprises an annular passage formed in the axial direction of the boss portion provided in the support shaft which supports the impeller, the annular passage, and the intake passage, to claim 3 where the structure leading to said exhaust passage The blower described. The region includes an annular passage formed in the axial direction of the boss portion, and the annular passage is configured to be connected to the intake passage and the exhaust passage, and a chamber is formed in the annular passage. The blower according to any one of claims 3 to 6 , wherein a fan synchronized with the impeller is provided in the room. The blower according to claim 7 , wherein the room is closed by a shielding plate.