TWM577458U - Belt driving mechanism for blower of cooling tower - Google Patents
Belt driving mechanism for blower of cooling tower Download PDFInfo
- Publication number
- TWM577458U TWM577458U TW107215677U TW107215677U TWM577458U TW M577458 U TWM577458 U TW M577458U TW 107215677 U TW107215677 U TW 107215677U TW 107215677 U TW107215677 U TW 107215677U TW M577458 U TWM577458 U TW M577458U
- Authority
- TW
- Taiwan
- Prior art keywords
- belt
- side pulley
- blower
- pulley
- driven
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
提供一種冷卻塔送風機用皮帶傳動機構,其使用平皮帶來作為送風機用之傳動用皮帶,並且適當地配設抑制皮帶之蛇行之張力調整部,可防止皮帶之脫落,實現免維護,並且實現葉輪驅動之效率化。使用平皮帶作為架設於驅動側滑輪11與從動側滑輪12之間之傳動用皮帶13,並且將利用與該皮帶13接觸之拉緊帶輪14d而保持為皮帶13不撓曲之張力調整部14,設為亦具有抑制運行中之皮帶13之蛇行之功能者,並且使拉緊帶輪14d之旋轉中心位置位於從動側滑輪12附近,因此可利用張力調整部14之拉緊帶輪14d來適當限制皮帶13,即便藉由葉輪之反旋轉而皮帶13之運行方向變化,亦可抑制皮帶13之偏移而防止從各滑輪上之脫落。Provided is a belt transmission mechanism for a blower of a cooling tower, which uses a flat belt as a transmission belt for the blower, and is suitably provided with a tension adjustment part that suppresses the meandering of the belt, can prevent the belt from falling off, realizes maintenance-free, and realizes an impeller Drive efficiency. A flat belt is used as the transmission belt 13 stretched between the driving-side pulley 11 and the driven-side pulley 12, and the tension adjusting portion 14 that does not flex the belt 13 is maintained by the tensioning pulley 14 d in contact with the belt 13. It is set to also have the function of suppressing the meandering of the belt 13 in operation, and the rotation center position of the tensioning pulley 14d is located near the driven side pulley 12, so the tensioning pulley 14d of the tension adjustment section 14 can be used to The belt 13 is appropriately restricted, and even if the running direction of the belt 13 is changed by the reverse rotation of the impeller, it is possible to suppress the deviation of the belt 13 and prevent the belt 13 from falling off.
Description
本創作係關於一種使循環使用之液相之熱介質於熱交換部中與空氣進行熱交換而冷卻之冷卻塔,尤其關於一種用以利用電動機而使冷卻塔中之通風用之送風機移動之皮帶傳動機構。This creation relates to a cooling tower that allows a circulating liquid-phase heat medium to exchange heat with air in a heat exchange unit, and particularly relates to a belt that uses an electric motor to move a blower for ventilation in the cooling tower. Transmission mechanism.
通常,以工廠或空氣調節設備等中循環使用之水等液相之熱介質之冷卻為目的而設置於戶外之冷卻塔中,形成如下構造:於冷卻塔內部之熱交換部中,使隨著送風機(風扇)之作動而從外部引入之空氣(外氣)與熱介質直接或間接地進行熱交換,而進行冷卻。Generally, a cooling tower installed outdoors is used for cooling a liquid-phase heat medium such as water circulating in a factory or air-conditioning equipment, and has the following structure: In a heat exchange section inside the cooling tower, the following The air (outside air) introduced from the outside by the operation of the blower (fan) exchanges heat directly or indirectly with the heat medium to cool it.
此種冷卻塔中使用之送風機係通常利用電動機來旋轉驅動葉輪者,過去以來,主要利用於葉輪與電動機之間插有皮帶傳動機構等驅動力傳遞機構而將電動機從葉輪上分離配置者。而且,作為此種機構,多使用於電動機側與葉輪側分別配置滑輪,且於該等滑輪上捲掛有皮帶之皮帶傳動機構。
採用此種送風機用之皮帶傳動機構之冷卻塔之例子有日本專利特開2000-145698號公報中記載者。
[現有技術文獻]
[專利文獻]
The blower used in such a cooling tower is usually a motor that drives the impeller to rotate. In the past, it is mainly used to separate the motor from the impeller by driving force transmission mechanism such as a belt transmission mechanism inserted between the impeller and the motor. Further, as such a mechanism, a belt transmission mechanism in which pulleys are respectively disposed on the motor side and the impeller side, and a belt is wound around the pulleys is often used.
An example of a cooling tower using such a belt drive mechanism for a blower is described in Japanese Patent Laid-Open No. 2000-145698.
[Prior Art Literature]
[Patent Literature]
[專利文獻1]日本專利特開2000-145698號公報[Patent Document 1] Japanese Patent Laid-Open No. 2000-145698
[創作所欲解決之問題][Problems to be solved by creation]
與現有之冷卻塔中之送風機之驅動相關之皮帶傳動機構係設為如上述專利文獻中所示者,傳遞驅動力之皮帶中通常採用V形皮帶。The belt transmission mechanism related to the driving of the blower in the existing cooling tower is set as shown in the above-mentioned patent documents, and a V-shaped belt is usually used in the belt that transmits the driving force.
如上所述於皮帶傳動機構中使用V形皮帶者由於如下特徵,即,於設置於電動機側或送風機側之各滑輪外周的V字狀之槽中嵌入V形皮帶而傳遞驅動力之特徵,故而難以產生皮帶運行中之皮帶之蛇行或從滑輪上之脫落。然而,於厚度方向之尺寸增大之V形皮帶之結構上存在如下課題:由於皮帶之撓曲剛性大,故而隨之,與驅動力傳遞相關之損耗變大。As described above, a person using a V-belt in a belt transmission mechanism has a feature of transmitting a driving force by inserting a V-belt in a V-shaped groove provided on the outer periphery of each pulley on the motor side or the blower side. It is difficult to cause the belt to meander or detach from the pulley while the belt is running. However, the structure of a V-shaped belt with an increased size in the thickness direction has the following problems: Since the belt has a large flexural rigidity, the loss associated with the transmission of driving force becomes larger.
另外,若隨著皮帶之經年變化,皮帶產生伸長、撓曲,則皮帶之一部分從電動機側或風扇側之各滑輪表面浮起而容易成為光滑之狀態,皮帶之傳動效率下降,因此需要定期地調整電動機與風扇之間之軸間距離等,將皮帶之鬆緊維持一定程度,存在耗費維護之時間之課題。In addition, if the belt is stretched and deflected as the belt changes over time, part of the belt floats from the surface of the pulleys on the motor or fan side and easily becomes smooth, and the transmission efficiency of the belt decreases. It is necessary to adjust the distance between the shafts between the motor and the fan to maintain the tightness of the belt to a certain degree, which has the problem of consuming maintenance time.
本創作係為解決上述課題而形成者,目的在於提供一種冷卻塔送風機用皮帶傳動機構,其使用平皮帶作為送風機用之傳動用皮帶,並且適當配設抑制皮帶之蛇行的張力調整部,可防止皮帶之脫落,實現免維護,並且實現葉輪驅動之效率化。
[解決問題之手段]
This creation was created to solve the above-mentioned problems, and the purpose is to provide a belt transmission mechanism for a cooling tower blower, which uses a flat belt as the transmission belt for the blower, and is appropriately provided with a tension adjustment unit that suppresses the belt's meandering to prevent The drop of the belt realizes maintenance-free operation and realizes the efficiency of impeller driving.
[Means for solving problems]
本創作之冷卻塔送風機用皮帶傳動機構係於使藉由送風機之抽氣通風而從外部引入之空氣與冷卻對象之熱介質進行熱交換之冷卻塔中的用以對送風機之葉輪傳遞來自電動機之旋轉驅動力的皮帶傳動機構,其特徵在於包括:驅動側滑輪,其與上述電動機之輸出軸一體地配設;從動側滑輪,其與上述送風機之葉輪之旋轉軸一體地配設;皮帶,其係架設於上述驅動側滑輪與從動側滑輪之間的平皮帶;以及張力調整部,其配設於上述驅動側滑輪與從動側滑輪之間,利用與皮帶接觸之拉緊帶輪對皮帶施加作用力而保持為不撓曲,並且控制皮帶之寬度方向之移動而抑制蛇行;並且該張力調整部係對於上述皮帶之架設於滑輪間之部位中的於送風機進行抽氣通風之通常旋轉狀態下之皮帶運行方向上成為皮帶鬆弛側之部位,將拉緊帶輪設為可從皮帶外方擠壓之配置,並且配設為使拉緊帶輪之旋轉中心位於與從動側滑輪之旋轉中心位置之距離成為驅動側滑輪與從動側滑輪之軸間距離之約35%以下之區域內。The belt transmission mechanism for the cooling tower blower of this creation is a cooling tower in which the air introduced from the outside through the exhaust ventilation of the blower exchanges heat with the heat medium of the cooling object to transfer the impeller of the blower from the motor. The belt driving mechanism for rotary driving force is characterized by comprising: a driving side pulley, which is integrally arranged with the output shaft of the motor; a driven side pulley, which is integrally arranged with the rotation shaft of the impeller of the blower; a belt, A flat belt is set between the driving side pulley and the driven side pulley; and a tension adjusting part is arranged between the driving side pulley and the driven side pulley, and uses a tensioned pulley pair that is in contact with the belt The belt exerts a force to keep it from flexing, and controls the movement in the width direction of the belt to suppress the meandering; and the tension adjusting unit is a normal rotating state of the fan for exhausting and ventilating the belt mounted between the pulleys The lower belt runs in the direction of the belt's slack side. The tensioning pulley is configured to be squeezed from the outside of the belt. And with tensioning pulley to the rotational center located at a distance of the center of rotation of the driven pulley side becomes a position within the area of approximately 35% from the drive shaft side pulley and the driven pulley between.
如上所述依據本創作,不僅使用平皮帶作為架設於驅動側滑輪與從動側滑輪之間之傳動用皮帶,並且將利用與該皮帶接觸之拉緊帶輪而保持為皮帶不撓曲之張力調整部,設為亦具有控制運行中之皮帶之寬度方向之移動而抑制皮帶之蛇行之功能者,並且,使拉緊帶輪之旋轉中心位置位於從動側滑輪附近之既定區域,以拉緊帶輪來擠壓皮帶鬆弛側,藉此可利用張力調整部之拉緊帶輪來適當限制皮帶,於電動機停止狀態下送風機之葉輪利用外力而向與通常作動時相反之方向旋轉,即便隨之,皮帶之運行方向變化,亦可抑制皮帶之偏移而防止從各滑輪上之脫落,可確實減輕與維護相關之負擔。另外,使用平皮帶而抑制傳動之損耗,可效率良好地進行葉輪之驅動。As described above, according to this creation, not only a flat belt is used as a transmission belt that is erected between the driving side pulley and the driven side pulley, but also the tension adjustment that keeps the belt inflexible by using the tensioning pulley that is in contact with the belt It is set to have the function of controlling the movement of the belt in the width direction to suppress the meandering of the belt, and the rotation center position of the tensioning pulley is located in a predetermined area near the driven side pulley to tighten the belt The roller can press the loose side of the belt, so that the belt can be properly restricted by the tensioning pulley of the tension adjustment part. When the motor is stopped, the impeller of the blower rotates in the opposite direction to that during normal operation by external force. The change of the running direction of the belt can also suppress the deviation of the belt and prevent the belt from falling off, which can surely reduce the burden related to maintenance. In addition, the use of a flat belt suppresses the loss of transmission, and the impeller can be driven efficiently.
另外,本創作之冷卻塔送風機用皮帶傳動機構視需要而具備以可調整位置之方式將上述電動機支持於送風機之側方的支持裝置,該支持裝置係以如下之既定之電動機支持狀態來固定電動機:藉由送風機作動時之送風機各部之彈性變形,以驅動側滑輪之旋轉中心軸成為與從動側滑輪之旋轉中心軸平行之方式,預先使電動機輸出軸傾斜。In addition, the belt transmission mechanism for the cooling tower blower of the present invention is provided with a support device for supporting the above-mentioned motor to the side of the blower in an adjustable position as required, and the support device fixes the motor in a predetermined motor support state as follows : By the elastic deformation of each part of the blower when the blower operates, the motor output shaft is tilted in advance so that the rotation center axis of the driving side pulley becomes parallel to the rotation center axis of the driven side pulley.
如上所述依據本創作,設置以可調整位置之方式來支持電動機之支持裝置,可調整電動機輸出軸之方向,預先把握藉由因送風機作動時之動態負載所引起之送風機各部之變形而產生之電動機輸出軸之傾斜,藉由使用該傾斜量之位置調整,而獲得反向之軸傾斜角度,藉此設為將送風機作動時產生之輸出軸之傾斜消除之狀態,可於送風機作動時確保驅動側滑輪與從動側滑輪之平行度,不會對運行之皮帶施加多餘之力,可適當發揮張力調整部之拉緊帶輪的防止皮帶之蛇行之功能。As described above, according to this creation, a support device is provided to support the motor in an adjustable position. The direction of the output shaft of the motor can be adjusted to grasp in advance the deformation of the various parts of the blower caused by the dynamic load when the blower operates. The inclination of the output shaft of the motor is adjusted by using the position of the inclination to obtain the inclination angle of the shaft in the reverse direction, thereby setting the state of the inclination of the output shaft generated when the blower is operated to ensure the drive when the blower is operated The parallelism of the side pulley and the driven side pulley will not exert extra force on the running belt, and can properly exert the function of the belt tensioner to prevent the belt from hunting.
另外,本創作之冷卻塔送風機用皮帶傳動機構視需要具備將上述驅動側滑輪、從動側滑輪、皮帶及張力調整部覆蓋之外罩,設為於該外罩之張力調整部周圍部分不存在使外罩內部與外部相通之開口部之狀態,且於外罩中之驅動側滑輪下側之電動機輸出軸周圍部分與從動側滑輪下側之葉輪旋轉軸周圍部分中之至少一者或兩者中,設為至少產生使外部之空氣向外罩內流通之開口部的狀態。In addition, the belt transmission mechanism for the cooling tower blower of the present invention is provided with an outer cover that covers the driving pulley, the driven pulley, the belt, and the tension adjusting portion as necessary. The outer portion of the tension adjusting portion of the outer cover does not exist so that the outer cover is provided. The state of the openings communicating with the inside, and at least one or both of the part around the motor output shaft under the drive side pulley and the part around the impeller rotating shaft under the driven side pulley in the housing, It is a state which produces | generates at least the opening part which circulates outside air to the inside of a cover.
如上所述依據本創作,於外罩中之張力調整部近旁不產生水出入之開口部,另一方面,於通過外罩之電動機輸出軸或葉輪旋轉軸之部分,設為存在從外部向外罩內流通空氣之開口部之狀態,藉此防止於張力調整部附近,水從外部到達外罩內部而對張力調整部造成不良影響,進而,於外罩之驅動側滑輪近旁部分或從動側滑輪近旁部分,設為可向外罩內流通外部之空氣,可防止因外罩內外之溫度差而產生凝露,確保外罩內不存在液相之水之狀態,除張力調整部以外,還抑制因送風機或電動機與水之接觸而引起之劣化。As described above, according to the present creation, an opening portion where water does not flow in and out near the tension adjustment portion in the cover, and on the other hand, the portion of the motor output shaft or impeller rotating shaft passing through the cover is provided to flow from the outside to the inside of the cover. The state of the opening portion of the air prevents water from reaching the inside of the cover from the outside to affect the tension adjusting portion in the vicinity of the tension adjusting portion. In order to allow external air to flow inside the cover, to prevent condensation due to the temperature difference between the inside and outside of the cover, to ensure that there is no liquid water in the cover, in addition to the tension adjustment section, it is also to suppress the Degradation due to contact.
另外,本創作之冷卻塔送風機用皮帶傳動機構設為如下者:視需要,上述張力調整部具有以可圍繞與從動側滑輪之旋轉中心軸平行之軸線而傾動之方式來支持的臂部,上述拉緊帶輪以可旋轉之方式安裝於上述臂部,連同臂部一起,由施力機構向與從動側滑輪接近之方向施力而傾動,從而與皮帶接觸。In addition, the belt transmission mechanism for the cooling tower blower of this creation is set as follows: if necessary, the tension adjusting portion has an arm portion that can be tilted around an axis parallel to the rotation center axis of the driven-side pulley, The tensioning pulley is rotatably mounted on the arm portion, and together with the arm portion, is biased by a force applying mechanism in a direction approaching the driven-side pulley to contact the belt.
如上所述依據本創作,張力調整部之拉緊帶輪安裝於傾動之臂部,藉由施力機構之施力而向與從動側滑輪接近之方向傾動,與皮帶接觸,藉此,拉緊帶輪與皮帶接觸而擠壓其,可簡略且緊湊地構成同時抑制皮帶之撓曲及蛇行之構造,可將位於送風機之送風路徑上之張力調整部設為必要最小限度之大小而減小送風阻抗,抑制冷卻塔中之運轉時之損耗,實現進一步之效率提高。As described above, according to this creation, the tensioning pulley of the tension adjusting portion is installed on the tilting arm portion, and the force is applied by the urging mechanism to tilt in a direction approaching the driven side pulley to contact the belt, thereby pulling the The tight pulley is in contact with the belt and squeezes it. It can be constructed simply and compactly while suppressing the deflection and meandering of the belt. The tension adjustment part located on the air supply path of the blower can be reduced to the minimum necessary size and reduced. Supply air resistance, suppress the loss during operation in the cooling tower, and achieve further efficiency improvement.
以下,基於上述圖1至圖5,對本創作之一實施方式之皮帶傳動機構進行說明。本實施方式中,對應用於作為交叉流式(橫流式),夾持抽氣通風用之送風機之某中央部而將兩個熱交換部對向配置之冷卻塔中之例進行說明。Hereinafter, a belt transmission mechanism according to an embodiment of the present invention will be described based on FIG. 1 to FIG. 5 described above. In the present embodiment, an example will be described in which a cooling tower is used as a cross-flow type (cross-flow type) in which two heat exchange units are arranged facing each other while sandwiching a central portion of a blower for exhaust ventilation.
如上述各圖所示,本實施方式之皮帶傳動機構10係用以對冷卻塔50之送風機60傳遞來自電動機70之驅動力者,具體而言,為包括以下構件之構成:驅動側滑輪11,其與電動機70之輸出軸71一體地配設;從動側滑輪12,其與送風機60之葉輪61中之旋轉軸一體地配設;皮帶13,其架設於驅動側滑輪11與從動側滑輪12之間;張力調整部14,其利用與皮帶13接觸之拉緊帶輪14d而將皮帶13保持為不撓曲;外罩15,其將驅動側滑輪11、從動側滑輪12、皮帶13及張力調整部14覆蓋;以及支持裝置16,其以可調整位置之方式將電動機70支持於送風機60之側方。As shown in the above figures, the belt transmission mechanism 10 of this embodiment is used to transmit the driving force from the motor 70 to the blower 60 of the cooling tower 50. Specifically, the belt transmission mechanism 10 includes the following components: the drive side pulley 11, It is arranged integrally with the output shaft 71 of the motor 70; the driven-side pulley 12 is arranged integrally with the rotating shaft in the impeller 61 of the blower 60; and the belt 13 is mounted on the driving-side pulley 11 and the driven-side pulley Between 12; tension adjusting part 14 which keeps the belt 13 inflexible by using the tensioning pulley 14d which is in contact with the belt 13; the cover 15 which drives the driving side pulley 11, the driven side pulley 12, the belt 13 and the tension The adjustment unit 14 covers; and a support device 16 that supports the electric motor 70 to the side of the blower 60 in an adjustable position.
應用本實施方式之皮帶傳動機構10之冷卻塔50係如下裝置:作為交叉流式(橫流式),夾持中央之通風用空間而將兩個熱交換部(省略圖示)對向配置,藉由配設於中央上部之排氣側開口部的送風機60之抽氣通風,從側方對各熱交換部中引入外部之空氣,使該空氣與冷卻對象之熱介質進行熱交換;皮帶傳動機構10以外之冷卻塔50之各部,例如,於循環水與外部空氣之間進行熱交換之熱交換部、或配設於該熱交換部之上下的上部水槽與下部水槽、進行電動機70之驅動控制之控制系統等為公知之構成,省略詳細之說明。The cooling tower 50 to which the belt transmission mechanism 10 of the present embodiment is applied is a cross-flow type (cross-flow type) in which two heat exchange sections (not shown) are arranged to face each other while sandwiching the ventilation space in the center. Exhaust air is provided by a blower 60 arranged on an exhaust-side opening at the upper part of the center, and external air is introduced into each heat exchange part from the side, so that the air exchanges heat with a heat medium to be cooled; a belt transmission mechanism Each part of the cooling tower 50 other than 10 is, for example, a heat exchange part that performs heat exchange between circulating water and outside air, or an upper water tank and a lower water tank that are arranged above and below the heat exchange part, and performs drive control of the motor 70 The control system and the like are well-known structures, and detailed descriptions are omitted.
於該冷卻塔50中之送風機60之側方,經由支持裝置16而配設電動機70。而且,為如下構造:電動機70之輸出軸71之旋轉藉由皮帶傳動機構10而傳遞至送風機60之葉輪61,葉輪61旋轉而實行抽氣通風。A motor 70 is disposed on the side of the blower 60 in the cooling tower 50 via the support device 16. Furthermore, it has a structure in which the rotation of the output shaft 71 of the motor 70 is transmitted to the impeller 61 of the blower 60 through the belt transmission mechanism 10, and the impeller 61 rotates to perform exhaust ventilation.
上述驅動側滑輪11固定配設於電動機70之輸出軸71上,設為可與該輸出軸71一體地旋轉者,隨著電動機70之輸出軸71之旋轉而旋轉,使捲掛之皮帶13朝向張力調整部14之拉緊帶輪14d及從動側滑輪12而運行。The above-mentioned drive side pulley 11 is fixedly arranged on the output shaft 71 of the motor 70, and is configured to be able to rotate integrally with the output shaft 71, and rotates with the rotation of the output shaft 71 of the motor 70, so that the wound belt 13 faces The tension pulley 14 d and the driven-side pulley 12 are operated by the tension adjusting unit 14.
上述從動側滑輪12固定配設於送風機60中之葉輪61之旋轉軸上,設為可與葉輪61一體地旋轉者。該從動側滑輪12係較驅動側滑輪11而言增大外徑而形成,係相對於電動機70之輸出軸71而使葉輪61以更低之旋轉數來旋轉之構造。The above-mentioned driven-side pulley 12 is fixedly disposed on the rotation shaft of the impeller 61 in the blower 60 and is configured to be able to rotate integrally with the impeller 61. The driven-side pulley 12 has a larger outer diameter than the driving-side pulley 11 and has a structure in which the impeller 61 rotates with a lower number of rotations relative to the output shaft 71 of the motor 70.
上述皮帶13係形成為環形平皮帶,架設於驅動側滑輪11與從動側滑輪12之間,隨著驅動側滑輪11之旋轉而運行,使從動側滑輪12產生旋轉。The above-mentioned belt 13 is formed as an endless flat belt, which is bridged between the driving-side pulley 11 and the driven-side pulley 12 and runs as the driving-side pulley 11 rotates, so that the driven-side pulley 12 rotates.
上述張力調整部14之構成包括:基底部14a,其固定設置於送風機60上側之驅動側滑輪11與從動側滑輪12之間之部位;臂部14b,其以可圍繞與從動側滑輪12之旋轉中心軸平行之軸線而傾動之方式安裝於該基底部14a之一端部;作為施力機構之彈簧14c,其將兩端分別安裝於基底部14a之另一端部與臂部14b之前端,向使臂部14b之前端與基底部14a之另一端部接近之方向施力;以及拉緊帶輪14d,其於臂部14b之前端,可圍繞與從動側滑輪12之旋轉中心軸平行之中心軸而旋轉,且使中心軸方向之位置符合從動側滑輪12之位置而安裝。The above-mentioned tension adjusting portion 14 includes a base portion 14a fixedly disposed between the driving-side pulley 11 and the driven-side pulley 12 on the upper side of the blower 60, and an arm portion 14b that can surround and follow the driven-side pulley 12 The rotation center axis is parallel to the axis and tilted to be installed at one end of the base portion 14a; the spring 14c as a urging mechanism has its two ends mounted at the other end of the base portion 14a and the front end of the arm portion 14b, Apply a force in a direction that brings the front end of the arm portion 14b close to the other end portion of the base portion 14a; and the tensioning pulley 14d, which can surround the front end of the arm portion 14b parallel to the central axis of rotation of the driven-side pulley 12 The center axis rotates and the position in the direction of the center axis matches the position of the driven-side pulley 12 and is attached.
該張力調整部14為如下構成:對於皮帶13之架設於滑輪間之部位中的於送風機60進行抽氣通風之通常作動狀態下之皮帶運行方向上成為皮帶鬆弛側之部位,將拉緊帶輪14d設為可從皮帶外方擠壓之配置,並且配設為使拉緊帶輪14d之旋轉中心位於與從動側滑輪12之旋轉中心位置之距離成為驅動側滑輪11與從動側滑輪12之軸間距離之約35%以下之區域內,更佳為成為約24~31%之區域內。The tension adjusting section 14 is configured to tighten the pulley for a portion of the belt 13 positioned between the pulleys, where the belt is slack in the belt running direction in the normal operating state of the air blower 60 for exhaust ventilation. 14d is configured to be squeezed from the outside of the belt, and is arranged so that the distance between the rotation center of the tensioning pulley 14d and the rotation center position of the driven-side pulley 12 is the driving-side pulley 11 and the driven-side pulley 12 In the region where the distance between the axes is less than about 35%, it is more preferably in the region of about 24 to 31%.
尤其,張力調整部14之基底部14a為如下構成:以臂部14b藉由彈簧14c向與從動側滑輪12接近之方向施力而傾動,成為該臂部14b上之拉緊帶輪14d擠壓皮帶13之狀態之方式,固定於靠近從動側滑輪12之既定部位。如此一來,藉由設為相對於基底部14a,使臂部14b向既定方向傾動而使拉緊帶輪14d移動之機構,可將除拉緊帶輪14d以外之張力調整部14之主要部分緊湊地集中配置於皮帶13所運行之部分之下側,可將由該張力調整部14之配置所引起之送風機60之送風阻抗抑制為必要最小限度。In particular, the base portion 14a of the tension adjusting portion 14 has a structure in which the arm portion 14b is tilted in a direction approaching the driven-side pulley 12 by a spring 14c, and the tension portion 14d on the arm portion 14b is squeezed. The state of pressing the belt 13 is fixed to a predetermined position near the driven-side pulley 12. In this way, the main part of the tension adjusting part 14 other than the tensioning pulley 14d can be set by a mechanism that tilts the arm portion 14b in a predetermined direction with respect to the base portion 14a to move the tensioning pulley 14d. It can be compactly arranged on the lower side of the portion where the belt 13 runs, and the air supply resistance of the air blower 60 caused by the arrangement of the tension adjustment portion 14 can be suppressed to the minimum necessary.
另外,拉緊帶輪14d具有如例如日本專利第3680083號公報或日本專利第4365713號公報中所記載之公知之蛇行防止用機構,其與架設於滑輪間而運行之平皮帶接觸,防止平皮帶之蛇行或向皮帶寬度方向之偏移。In addition, the tension pulley 14d has a known mechanism for preventing meandering as described in, for example, Japanese Patent No. 3680083 or Japanese Patent No. 4365713, which is in contact with a flat belt running between pulleys to prevent the flat belt Snake or offset to the width of the belt.
此種拉緊帶輪14d為如下構造:與臂部14b一併向與從動側滑輪12接近之方向施力而傾動,與皮帶13接觸而賦予張力,藉此,可將皮帶13設為張緊狀態而保持為不撓曲,並且控制皮帶13之寬度方向之移動而抑制蛇行等。Such a tensioning pulley 14d has a structure in which the force is tilted together with the arm portion 14b in a direction approaching the driven-side pulley 12, and the tension is brought into contact with the belt 13, thereby the belt 13 can be tensioned. The tight state is maintained without being deflected, and the widthwise movement of the belt 13 is controlled to suppress meandering and the like.
另外,藉由將張力調整部14中之拉緊帶輪14d之旋轉中心配設為位於靠近從動側滑輪12之既定區域,則即使於假設皮帶13之運行方向係向與送風機60之通常作動狀態相反之方向變化之情形時,亦可維持拉緊帶輪14d對於皮帶13之蛇行防止功能,可抑制皮帶13之偏移而防止從各滑輪上之脫落。In addition, by arranging the rotation center of the tensioning pulley 14d in the tension adjusting portion 14 to be located in a predetermined area close to the driven-side pulley 12, even if the running direction of the belt 13 is assumed to be normal to the normal operation of the blower 60, When the state changes in the opposite direction, the meandering prevention function of the tightening pulley 14d with respect to the belt 13 can be maintained, and the deviation of the belt 13 can be suppressed to prevent falling off from each pulley.
冷卻塔之送風機具有如下特徵:於電動機之停止時,藉由因強風時等之外氣之流動或來自近接配置之其他冷卻塔之排氣而對葉輪施加之風壓,葉輪可向與電動機驅動之通常作動時相反之方向旋轉。The blower of the cooling tower has the following characteristics: When the motor is stopped, the impeller can be driven to the motor by the wind pressure applied to the impeller due to the flow of outside air such as strong winds or the exhaust from other cooling towers in close proximity. It usually rotates in the opposite direction when it is actuated.
本案申請人明確指出如下問題:此種冷卻塔之送風機中,於將平皮帶及具有與其對應之蛇行防止用機構之拉緊帶輪,假設與不可產生葉輪之反旋轉的一般送風機同樣地,設為配置於電動機輸出軸之驅動側滑輪近旁之皮帶鬆弛側之既定部位的狀態而採用之情形時,當葉輪向與通常作動時相反之方向旋轉時,隨著從拉緊帶輪對皮帶施加之力與皮帶之運行方向之關係變化,拉緊帶輪之蛇行防止功能不再正常發揮,成為容易向寬度方向偏移之平皮帶之缺點直接顯現之狀態,容易陷入皮帶脫落之事態。The applicant in this case clearly pointed out the following problems: In this type of cooling tower blower, the flat belt and the tensioning pulley with a corresponding meandering prevention mechanism are assumed to be the same as a general blower that cannot generate reverse rotation of the impeller. When the impeller is rotated in a direction opposite to the direction of normal operation when it is placed at a predetermined position on the loose side of the belt near the drive-side pulley of the motor output shaft, the belt is applied from the tensioned pulley to the belt. The relationship between the force and the running direction of the belt changes. The function of preventing the meandering of the tensioning pulley is no longer functioning normally, and the shortcomings of the flat belt that is easy to shift in the width direction are directly manifested, and it is easy to fall into the state of the belt falling off.
對此,本案申請人確認了:藉由將張力調整部14之拉緊帶輪14d之位置,如上所述設定於靠近從動側滑輪12之既定區域,則即便產生葉輪61之反旋轉,亦基本上不會使皮帶13與拉緊帶輪14d之相互之關係變化,可順暢地維持拉緊帶輪14d之蛇行防止功能。In this regard, the applicant of the present case has confirmed that by setting the position of the tensioning pulley 14d of the tension adjusting section 14 as described above in a predetermined area close to the driven-side pulley 12, even if the impeller 61 reversely rotates, Basically, the relationship between the belt 13 and the tensioning pulley 14d is not changed, and the meandering prevention function of the tensioning pulley 14d can be smoothly maintained.
上述外罩15形成為大致箱狀而配設於送風機60之上側,係將驅動側滑輪11、從動側滑輪12、皮帶13及張力調整部14覆蓋者。藉由該外罩15,防止雨等從外部向送風機60中之水、或藉由抽氣通風而從冷卻塔內部到達送風機60之空氣中所含之水滴等到達傳動機構各部而造成不良影響。The cover 15 is formed in a substantially box shape and is disposed on the upper side of the blower 60, and covers the driving-side pulley 11, the driven-side pulley 12, the belt 13, and the tension adjustment unit 14. This cover 15 prevents the rain or the like from entering the water in the blower 60 from the outside, or the water droplets contained in the air reaching the blower 60 from the inside of the cooling tower through the exhaust ventilation to cause adverse effects on various parts of the transmission mechanism.
於外罩15之張力調整部周圍部分,設為不存在使外罩內部與外部相通之開口部的狀態。於設置有外罩15之時刻,於在張力調整部14之周圍,產生於外罩與鄰接之其他構件之間成為開口部之間隙之情形時,藉由彈性材等之插入或填充而成為不存在開口之狀態。藉由消除張力調整部14周圍之開口部,而使水或來自冷卻塔內部之潮濕空氣不與張力調整部14接觸,從而防止張力調整部14之劣化。A portion around the tension adjustment portion of the cover 15 is in a state where there is no opening portion that allows the inside of the cover to communicate with the outside. At the time when the cover 15 is provided, when the gap between the cover and another member adjacent to the tension adjustment portion 14 becomes an opening, the opening is made non-existent by the insertion or filling of an elastic material or the like. Of the state. By eliminating the openings around the tension adjustment section 14, water or humid air from the inside of the cooling tower is prevented from contacting the tension adjustment section 14, thereby preventing deterioration of the tension adjustment section 14.
另一方面,於外罩15中之驅動側滑輪11下側之電動機輸出軸周圍部分、以及從動側滑輪12下側之葉輪旋轉軸周圍部分中之至少一者或兩者上,存在從外罩內向外部通水之開口部。為了對收納於外罩內之驅動側滑輪11或從動側滑輪12,分別連結電動機輸出軸或葉輪旋轉軸,外罩15中之該等部分最初設置有至少使該等通過之大小之貫通孔,上述開口部可作為此種貫通孔之一部分,即,未被從貫通孔中通過之軸等構件堵塞而殘留之間隙部分而產生。但,並不限定於此,亦可於外罩15之電動機輸出軸周圍部分或葉輪旋轉軸周圍部分另外穿設成為開口部之貫通孔。On the other hand, at least one or both of the peripheral portion of the motor output shaft on the lower side of the drive-side pulley 11 in the cover 15 and the peripheral portion of the impeller rotation shaft on the lower side of the driven-side pulley 12 exist from the inside to the outside of the cover. Openings for external water flow. In order to connect the drive-side pulley 11 or the driven-side pulley 12 housed in the housing to the motor output shaft or the impeller rotating shaft, respectively, the parts in the housing 15 are initially provided with through-holes of at least the size through which they pass. The opening portion may be formed as a part of such a through hole, that is, a gap portion remaining without being blocked by a member such as a shaft passing through the through hole. However, the present invention is not limited to this, and a through hole serving as an opening portion may be separately formed around the motor output shaft portion or the impeller rotation shaft portion of the cover 15.
藉由通過此種外罩15之開口部,於外罩15內出入外部之空氣,可防止產生由外罩內外之溫度差所引起之凝露,確保藉由凝露而產生之水不會積存於外罩內之狀態,除張力調整部以外,還可阻止送風機或電動機之重要部分與水之接觸。By passing through the opening portion of the outer cover 15, air in and out of the outer cover 15 can prevent condensation caused by a temperature difference between the inside and the outside of the cover, and ensure that water generated by the condensation does not accumulate in the cover. In this state, in addition to the tension adjustment part, it can also prevent important parts of the blower or motor from coming into contact with water.
此外,該等外罩15之電動機輸出軸周圍部分或葉輪旋轉軸周圍部分之開口部向下,且成為從由送風機60所送風之空氣之流路上脫離之位置,因此不存在水從該開口部浸入外罩內之疑慮。In addition, the openings around the motor output shaft or around the impeller rotating shaft of these housings 15 are downwards and become detached from the flow path of the air sent by the blower 60, so there is no water infiltration through the openings. Doubts inside the cover.
上述支持裝置16係以可調整位置之方式將電動機70支持於送風機60之側方者。詳細而言,支持裝置16係包括以下構件之構成:基部16a,其與送風機60一體化;調整框部16b,其以可將相對於該基部16a之位置或方向進行微調整之方式安裝於基部16a上,來固定電動機70。The supporting device 16 supports a motor 70 on the side of the blower 60 in an adjustable position. In detail, the supporting device 16 includes the following components: a base portion 16a that is integrated with the blower 60; and an adjustment frame portion 16b that is mounted on the base portion so that the position or direction of the base portion 16a can be finely adjusted. On 16a, the motor 70 is fixed.
該支持裝置16為如下構造:於電動機輸出軸71上產生與由送風機作動時之動態負載所引起之送風機各部之彈性變形相伴之傾動的階段,藉由調整框部16b相對於基部16a之位置調整,而獲得驅動側滑輪11之旋轉中心軸成為與從動側滑輪12之旋轉中心軸平行之電動機70之支持狀態。The supporting device 16 has a structure in which a tilting phase is generated on the motor output shaft 71 due to the elastic deformation of each part of the blower caused by a dynamic load when the blower is operated, and the position of the frame portion 16b relative to the base portion 16a is adjusted. , And obtained that the rotation center axis of the driving side pulley 11 becomes a support state of the motor 70 parallel to the rotation center axis of the driven side pulley 12.
冷卻塔中,根據所需之性能,來設定送風機之大小與驅動送風機之電動機之功率之複數個組合。關於與該冷卻塔之必需性能相應之送風機與電動機之複數個組合,於將支持裝置16上之電動機70固定為其輸出軸71成為與送風機旋轉軸平行之方向的狀態下,把握當施加與送風機作動時之動態負載相當之力而使送風機各部彈性變形時的輸出軸71之傾斜程度,可作為調整用資料來利用。In the cooling tower, a plurality of combinations of the size of the blower and the power of the motor driving the blower are set according to the required performance. Regarding the plurality of combinations of the blower and the motor corresponding to the required performance of the cooling tower, the motor 70 on the supporting device 16 is fixed with its output shaft 71 in a direction parallel to the rotation axis of the blower. The degree of inclination of the output shaft 71 when the dynamic load during operation is equivalent to the elastic deformation of each part of the blower can be used as adjustment data.
於實際上將電動機70固定於冷卻塔50上之情形時,藉由使用支持裝置16來調整電動機70之位置,可獲得既定之電動機支持狀態,即,使電動機輸出軸71之方向在與送風機作動時所傾斜之側相反之側,傾斜與已知之傾斜量對應之既定角度(參照圖5)。藉此,可以如下方式固定電動機70:於送風機作動時,驅動側滑輪11之旋轉中心軸成為與從動側滑輪12之旋轉中心軸平行,且驅動側滑輪11之中心軸方向之位置符合從動側滑輪12之中心軸方向之位置,架設於該等兩個滑輪上之皮帶之方向相對於各滑輪之中心軸方向而成為直角。When the motor 70 is actually fixed on the cooling tower 50, by using the support device 16 to adjust the position of the motor 70, a predetermined motor support state can be obtained, that is, the direction of the motor output shaft 71 is operated with the blower. On the opposite side of the tilted side, the tilted angle corresponds to a known tilting amount (see Figure 5). With this, the motor 70 can be fixed in such a manner that when the blower operates, the rotation center axis of the driving side pulley 11 becomes parallel to the rotation center axis of the driven side pulley 12, and the position of the center axis direction of the driving side pulley 11 conforms to the driven The position of the side pulley 12 in the direction of the central axis, the direction of the belts erected on the two pulleys becomes a right angle with respect to the direction of the central axis of each pulley.
如此一來,於使皮帶13運行之送風機作動時,可確保驅動側滑輪11、從動側滑輪12、以及拉緊帶輪14d中之各中心軸之相互之平行度,藉此,不會對運行之皮帶13施加使其向寬度方向偏移之多餘之力,可適當發揮張力調整部14之拉緊帶輪14d的防止皮帶之蛇行之功能。In this way, when the blower of the belt 13 is operated, the parallelism of the central axes of the driving side pulley 11, the driven side pulley 12, and the tensioning pulley 14d can be ensured. The running belt 13 exerts an excessive force to shift it in the width direction, and can appropriately exert the function of preventing the belt from meandering by the tensioning pulley 14d of the tension adjusting portion 14.
另外,藉由利用事先把握軸之傾斜量的調整用資料,於冷卻塔之每個設置現場,使送風機試運轉,把握由作動狀態之送風機之各部變形所引起之各滑輪間之位置偏移,基於其而對電動機之位置進行微調整,節省將各滑輪之位置關係設為適當狀態之作業之時間。In addition, by using the data for adjusting the inclination of the shaft in advance, test the blower at each installation site of the cooling tower, and grasp the position shift between the pulleys caused by the deformation of each part of the blower in the operating state. Based on this, the position of the motor is finely adjusted to save time in the operation of setting the positional relationship of each pulley to an appropriate state.
繼而,對基於上述構成之皮帶傳動機構之作動狀態進行說明。
與公知之冷卻塔同樣,於通常之冷卻塔運轉狀態下,反覆進行如下過程:由冷凍機或空氣調節機器等來吸收熱而加溫之循環水等冷卻對象之熱介質從既定之循環路徑中取出而流動至冷卻塔50之熱交換部內側,熱交換後再次返回至循環路徑。而且,藉由送風機60之抽氣通風而於熱交換部中導入外部之空氣,熱介質於熱交換部中與空氣進行熱交換而冷卻,另一方面,熱交換後之空氣從熱交換部中經過送風機60而向冷卻塔50上方排氣。
Next, an operation state of the belt transmission mechanism based on the above configuration will be described.
Similar to known cooling towers, under normal cooling tower operating conditions, the following process is repeatedly performed: cooling medium such as circulating water that is heated by chiller or air-conditioning equipment to absorb heat and is heated from a predetermined circulation path It is taken out and flows to the inside of the heat exchange section of the cooling tower 50, and returns to the circulation path after heat exchange. In addition, external air is introduced into the heat exchange unit by the exhaust ventilation of the blower 60, and the heat medium is cooled by heat exchange with the air in the heat exchange unit. On the other hand, the air after the heat exchange is removed from the heat exchange unit. The air passes through the blower 60 and is exhausted above the cooling tower 50.
於該運轉狀態下,在與負載之狀況(循環水溫、循環水量等)對應之開・閉(ON・OFF)等既定之控制下,電動機70作動,驅動側滑輪11與電動機70之輸出軸71一體地旋轉。隨著該驅動側滑輪11旋轉,捲掛於驅動側滑輪11上且架設於驅動側滑輪11與從動側滑輪12之間的皮帶13向從動側滑輪12運行,使從動側滑輪12旋轉。In this operating state, under predetermined control such as ON / OFF according to the load condition (circulating water temperature, circulating water amount, etc.), the motor 70 is operated to drive the side pulley 11 and the output shaft of the motor 70 71 rotates integrally. As the drive-side pulley 11 rotates, a belt 13 wound on the drive-side pulley 11 and stretched between the drive-side pulley 11 and the driven-side pulley 12 runs toward the driven-side pulley 12 to rotate the driven-side pulley 12 .
該運行之皮帶13於即將到達從動側滑輪12之前,與張力調整部14之拉緊帶輪14d接觸,對由彈簧14c施力而傾動之拉緊帶輪14d擠壓,皮帶13向內周側伸出,成為適度之張緊狀態。Immediately before the driven belt 13 reaches the driven-side pulley 12, the running belt 13 comes into contact with the tensioning pulley 14d of the tension adjusting portion 14 and presses the tensioning pulley 14d tilted by the force of the spring 14c, and the belt 13 is directed toward the inner periphery The side stretches out and becomes a moderate tension.
另外,拉緊帶輪14d係以與運行之皮帶13接觸之狀態,發揮防止該皮帶13之蛇行或向皮帶寬度方向之偏移的公知之蛇行防止功能,皮帶13藉由控制其寬度方向之移動而抑制蛇行或從各滑輪上之脫落。In addition, the tensioning pulley 14d is in a state of being in contact with the running belt 13 and exerts a known meandering prevention function to prevent the belt 13 from meandering or shifting in the belt width direction. The belt 13 controls the width direction movement It suppresses meandering or falling off from each pulley.
如此一來,藉由持續運行狀態之皮帶13而獲得驅動力來旋轉之從動側滑輪12使一體之葉輪61向相同之旋轉方向旋轉。該等從動側滑輪12與葉輪61之旋轉係相對於電動機輸出軸71之旋轉,以根據驅動側滑輪11之外徑與從動側滑輪12之外徑來求出之減速比而減速。
藉由從動側滑輪12以及與其一體之葉輪61旋轉,而實行送風。
In this way, the driven side pulley 12 that is driven by the driving force of the belt 13 in the continuous running state rotates the integrated impeller 61 in the same rotation direction. The rotation of the driven-side pulley 12 and the impeller 61 is relative to the motor output shaft 71, and the speed is reduced according to the reduction ratio obtained based on the outer diameter of the driving-side pulley 11 and the outer diameter of the driven-side pulley 12.
The driven side pulley 12 and the impeller 61 integrated with the driven side pulley 12 are rotated to perform air blowing.
皮帶傳動機構10中,驅動側滑輪11與皮帶13、以及皮帶13與從動側滑輪12分別一直接觸,藉由該等相互之摩擦而傳遞驅動力,藉此送風機作動中之噪音產生少,而且皮帶13設為平皮帶,彎曲性優異,與利用V形皮帶等之傳動之情形相比,可更減小噪音。另外,平皮帶之優點為:薄型且由彎曲引起之應變之影響小,耐久性優異,而且抑制彎曲性阻抗,提高傳動效率,實現與送風機之驅動相關之能量消耗之降低。In the belt transmission mechanism 10, the driving-side pulley 11 and the belt 13, and the belt 13 and the driven-side pulley 12 are in constant contact with each other, and the driving force is transmitted by such mutual friction, thereby generating less noise during the operation of the blower, and The belt 13 is a flat belt and has excellent flexibility, and can reduce noise more than a case where a V-belt or the like is used for transmission. In addition, the flat belt has the advantages of being thin and having a small effect of strain due to bending, excellent durability, and suppressing bending resistance, improving transmission efficiency, and realizing reduction in energy consumption related to driving of the blower.
進而,冷卻塔中,根據負載或周圍環境之狀況,進行如下控制:暫時使送風機之送風停止,即,使電動機停止而使送風機不作動;但於如上所述使電動機停止時,藉由因強風或來自鄰接冷卻塔之排氣而對葉輪施加之風壓,存在葉輪向與電動機驅動之通常作動時相反之方向旋轉之情況。於此種情形時,捲掛在與葉輪61一體地旋轉之從動側滑輪12上之皮帶13亦成為向與葉輪61之通常作動時相反之方向運行之狀態,但藉由將張力調整部14之拉緊帶輪14d配置於靠近從動側滑輪12,則即便皮帶13之運行方向成為反方向,亦基本上不會改變皮帶13與拉緊帶輪14d之相互關係,可將拉緊帶輪14d之蛇行防止功能維持原樣,可防止皮帶13之蛇行或從各滑輪上之脫落。Further, in the cooling tower, according to the load or the condition of the surrounding environment, the following control is performed: temporarily stopping the air supply of the blower, that is, stopping the motor to stop the blower; but when the motor is stopped as described above, due to strong wind Or the wind pressure applied to the impeller from the exhaust gas adjacent to the cooling tower may cause the impeller to rotate in the direction opposite to the normal operation of the motor drive. In this case, the belt 13 wound on the driven-side pulley 12 that rotates integrally with the impeller 61 also runs in a direction opposite to that during the normal operation of the impeller 61. However, the tension adjustment unit 14 The tensioning pulley 14d is arranged close to the driven side pulley 12, and even if the running direction of the belt 13 becomes the reverse direction, the relationship between the belt 13 and the tensioning pulley 14d will not be basically changed. The 14d meandering prevention function is maintained as it is, and it can prevent the meandering of the belt 13 or falling off from each pulley.
如上所述,本實施方式之皮帶傳動機構中,不僅使用平皮帶作為架設於驅動側滑輪11與從動側滑輪12之間的傳動用皮帶13,而且將利用與該皮帶13之鬆弛側接觸之拉緊帶輪14d而保持為皮帶13不撓曲之張力調整部14,設為亦具有控制運行中之皮帶13之寬度方向之移動而抑制皮帶13之蛇行之功能者,且使拉緊帶輪14d之旋轉中心位置位於從動側滑輪12附近之既定區域,因此可利用張力調整部14之拉緊帶輪14d來適當地限制皮帶13,於如下情形,即,於電動機停止狀態下,送風機60之葉輪藉由外力而向與通常作動時相反之方向旋轉,隨之,皮帶13之運行方向亦向與通常相反之方向變化之情形時,亦可利用拉緊帶輪14d來抑制皮帶13之偏移,防止從各滑輪上之皮帶脫落,可確實地減輕與維護相關之負擔。As described above, in the belt transmission mechanism of this embodiment, not only a flat belt is used as the transmission belt 13 stretched between the driving-side pulley 11 and the driven-side pulley 12, but also the belt 13 that makes contact with the loose side of the belt 13 is used. The tension adjusting part 14 that tightens the pulley 14d and keeps it as a non-deflection of the belt 13 is set to also have a function of controlling the movement of the width direction of the belt 13 in operation and suppressing the meandering of the belt 13 and tightening the pulley 14d The rotation center position is located in a predetermined area near the driven-side pulley 12, so the belt 13 can be appropriately restricted by the tensioning pulley 14d of the tension adjusting section 14, in the case where the motor 60 is stopped, the fan 60 When the impeller rotates in the opposite direction to the normal operation by external force, and the running direction of the belt 13 changes to the opposite direction, the tension of the pulley 14d can also be used to suppress the deviation of the belt 13 , Prevent the belt from falling off from each pulley, can surely reduce the burden related to maintenance.
此外,上述實施方式之皮帶傳動機構中,應用皮帶傳動機構之冷卻塔設為交叉流式之構成,但並不限定於此,若為送風機配設於冷卻塔上部者,則亦可適用於對流式等其他形式之冷卻塔。In addition, in the belt transmission mechanism of the above embodiment, the cooling tower to which the belt transmission mechanism is applied is configured as a cross-flow type, but it is not limited to this. If the blower is arranged on the upper part of the cooling tower, it can also be applied to convection. Other types of cooling towers.
另外,上述實施方式之皮帶傳動機構中,張力調整部14設為如下構成:相對於固定之基底部14a而使臂部14b傾動,將安裝於臂部14b上之拉緊帶輪14d對皮帶13擠壓;但並不限定於此,亦可將張力調整部設為如下構成:例如拉緊帶輪直線性地移動而將皮帶向一定方向擠壓,對皮帶施加張力者等,藉由傾動以外之移動而使拉緊帶輪與皮帶接觸之構成。In the belt transmission mechanism of the above-mentioned embodiment, the tension adjusting portion 14 is configured to tilt the arm portion 14b with respect to the fixed base portion 14a, and the tensioning pulley 14d attached to the arm portion 14b to the belt 13 Squeeze, but it is not limited to this, and the tension adjusting unit may be configured as follows: for example, a tensioning pulley moves linearly to squeeze the belt in a certain direction, and applies tension to the belt, etc. It moves to make the tension pulley contact the belt.
10‧‧‧皮帶傳動機構10‧‧‧Belt drive mechanism
11‧‧‧驅動側滑輪 11‧‧‧Drive side pulley
12‧‧‧從動側滑輪 12‧‧‧ driven side pulley
13‧‧‧皮帶 13‧‧‧Belt
14‧‧‧張力調整部 14‧‧‧Tension adjustment department
14a‧‧‧基底部 14a‧‧‧base
14b‧‧‧臂部 14b‧‧‧arm
14c‧‧‧彈簧 14c‧‧‧Spring
14d‧‧‧拉緊帶輪 14d‧‧‧Tighten the pulley
15‧‧‧外罩 15‧‧‧ Cover
16‧‧‧支持裝置 16‧‧‧ Support device
16a‧‧‧基部 16a‧‧‧Base
16b‧‧‧調整框部 16b‧‧‧Adjust the frame
50‧‧‧冷卻塔 50‧‧‧ cooling tower
60‧‧‧送風機 60‧‧‧Air blower
61‧‧‧葉輪 61‧‧‧ Impeller
70‧‧‧電動機 70‧‧‧motor
71‧‧‧輸出軸 71‧‧‧output shaft
圖1係應用本創作之一實施方式之皮帶傳動機構的冷卻塔之俯視圖。
圖2係本創作之一實施方式之皮帶傳動機構之外罩上部開放狀態說明圖。
圖3係本創作之一實施方式之皮帶傳動機構中之電動機之支持狀態說明圖。
圖4係本創作之一實施方式之皮帶傳動機構中之相對於支持裝置基部而言之調整框部與電動機之位置及方向可調整之狀態說明圖。
圖5係本創作之一實施方式之皮帶傳動機構之送風機停止狀態及作動狀態下之各滑輪之位置關係說明圖。
FIG. 1 is a top view of a cooling tower to which a belt transmission mechanism according to an embodiment of the present invention is applied.
FIG. 2 is an explanatory diagram of an open state of an outer cover of a belt transmission mechanism according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram of a supporting state of a motor in a belt transmission mechanism according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram of a state in which the position and direction of the adjustment frame portion and the motor in the belt transmission mechanism relative to the base of the supporting device in the embodiment of the present invention can be adjusted.
FIG. 5 is an explanatory diagram of the positional relationship of the pulleys in a stopped state and an activated state of a belt transmission mechanism according to an embodiment of the present invention.
Claims (5)
驅動側滑輪,其與上述電動機之輸出軸一體地配設;
從動側滑輪,其與上述送風機之葉輪中之旋轉軸一體地配設;
皮帶,其係架設於上述驅動側滑輪與從動側滑輪之間之平皮帶;以及
張力調整部,其配設於上述驅動側滑輪與從動側滑輪之間,利用與皮帶接觸之拉緊帶輪對皮帶施加作用力而保持為不撓曲,並且控制皮帶之寬度方向之移動而抑制蛇行;並且
該張力調整部係對於上述皮帶之架設於滑輪間之部位中的於送風機進行抽氣通風之通常旋轉狀態下之皮帶運行方向上成為皮帶鬆弛側之部位,將拉緊帶輪設為可從皮帶外方擠壓之配置,並且配設為使拉緊帶輪之旋轉中心位於與從動側滑輪之旋轉中心位置之距離成為驅動側滑輪與從動側滑輪之軸間距離之約35%以下之區域內。 The utility model relates to a belt transmission mechanism for a cooling tower blower, which is used in a cooling tower for exchanging air introduced from the outside with a heat medium of a cooling object through the exhaust ventilation of the blower to transfer the impeller of the blower from the motor. The belt drive mechanism for rotary driving force is characterized by:
A drive side pulley, which is integrally arranged with the output shaft of the motor;
The driven side pulley is integrally arranged with the rotating shaft in the impeller of the blower;
A belt is a flat belt that is set between the driving side pulley and the driven side pulley; and a tension adjusting part is arranged between the driving side pulley and the driven side pulley, and uses a tension belt that is in contact with the belt The wheel exerts a force on the belt to keep it from flexing, and controls the movement in the width direction of the belt to suppress the meandering; and the tension adjusting unit is generally used for extracting and ventilating the blower in the place where the belt is erected between the pulleys. The belt running direction becomes the part where the belt is slack in the rotating state. The tension pulley is configured to be squeezed from the outside of the belt, and the rotation center of the tension pulley is located on the driven pulley. The distance of the rotation center position is within a range of about 35% or less of the distance between the shafts of the driving side pulley and the driven side pulley.
包括以可調整位置之方式將上述電動機支持於送風機之側方的支持裝置,並且
該支持裝置係以如下之既定之電動機支持狀態來固定電動機:藉由送風機作動時之送風機各部之彈性變形,以驅動側滑輪之旋轉中心軸成為與從動側滑輪之旋轉中心軸平行之方式,預先使電動機輸出軸傾斜。 For example, the belt transmission mechanism for a cooling tower blower in the scope of patent application No. 1 includes a support device that supports the above-mentioned motor to the side of the blower in an adjustable position, and the support device is in the predetermined motor support state as follows To fix the motor: By the elastic deformation of each part of the blower when the blower is operating, the output shaft of the driving side pulley is made parallel to the rotating center axis of the driven side pulley, and the motor output shaft is tilted in advance.
包括將上述驅動側滑輪、從動側滑輪、皮帶及張力調整部覆蓋之外罩,
於該外罩中之張力調整部周圍部分,設為不存在使外罩內部與外部相通之開口部的狀態,並且於外罩中之驅動側滑輪下側之電動機輸出軸周圍部分與從動側滑輪下側之葉輪旋轉軸周圍部分中之至少一者或兩者中,設為至少產生使外部之空氣向外罩內流通之開口部之狀態。 For example, the belt transmission mechanism for the cooling tower blower of the scope of patent application No. 1 or 2 includes covering the above-mentioned driving side pulley, driven side pulley, belt and tension adjusting part,
The portion around the tension adjusting portion in the cover is in a state where there is no opening for communicating the inside of the cover with the outside, and the portion around the motor output shaft on the lower side of the drive-side pulley in the cover and the lower side of the driven-side pulley are set. At least one or both of the peripheral parts of the impeller rotating shaft are in a state in which at least an opening portion through which external air flows to the inside of the cover is generated.
上述張力調整部包括以可圍繞與從動側滑輪之旋轉中心軸平行之軸線而傾動之方式來支持之臂部,並且
上述拉緊帶輪係以可旋轉之方式安裝於上述臂部,連同臂部一起,由施力機構向與從動側滑輪接近之方向施力而傾動,從而與皮帶接觸。 For example, the belt transmission mechanism for a cooling tower fan according to item 1 or 2 of the patent application, wherein the tension adjusting portion includes an arm portion that can be tilted around an axis parallel to the rotation center axis of the driven side pulley, and The tightening belt wheel system is rotatably mounted on the arm portion, and together with the arm portion, is biased by a force applying mechanism in a direction approaching the driven-side pulley to contact the belt.
上述張力調整部包括以可圍繞與從動側滑輪之旋轉中心軸平行之軸線而傾動之方式來支持之臂部,並且
上述拉緊帶輪係以可旋轉之方式安裝於上述臂部,連同臂部一起,由施力機構向與從動側滑輪接近之方向施力而傾動,從而與皮帶接觸。 For example, the belt transmission mechanism for a cooling tower blower of claim 3, wherein the tension adjusting portion includes an arm portion that can be tilted around an axis parallel to the rotation center axis of the driven side pulley, and the pulling The tight-belt wheel system is rotatably mounted on the arm, and together with the arm, it is tilted by the urging mechanism in a direction approaching the driven-side pulley to contact the belt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP2017-222851 | 2017-11-20 | ||
JP2017222851A JP2019094940A (en) | 2017-11-20 | 2017-11-20 | Belt transmission mechanism for cooling tower air blower |
Publications (1)
Publication Number | Publication Date |
---|---|
TWM577458U true TWM577458U (en) | 2019-05-01 |
Family
ID=66538986
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW107141040A TW201923256A (en) | 2017-11-20 | 2018-11-19 | Belt transmission mechanism for cooling tower blower |
TW107215677U TWM577458U (en) | 2017-11-20 | 2018-11-19 | Belt driving mechanism for blower of cooling tower |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW107141040A TW201923256A (en) | 2017-11-20 | 2018-11-19 | Belt transmission mechanism for cooling tower blower |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2019094940A (en) |
TW (2) | TW201923256A (en) |
WO (1) | WO2019097501A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021162121A (en) * | 2020-04-01 | 2021-10-11 | 空研工業株式会社 | Belt transmission mechanism for cooling tower blower |
CN112404585A (en) * | 2020-11-09 | 2021-02-26 | 马鞍山海森控电气有限公司 | Floating wheel tensioning mechanism |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5693552U (en) * | 1979-12-19 | 1981-07-25 | ||
JPS615229U (en) * | 1984-06-18 | 1986-01-13 | 三菱自動車工業株式会社 | Power extraction device for work vehicles |
JP2003097655A (en) * | 2001-09-25 | 2003-04-03 | Daihatsu Motor Co Ltd | Non-stage transmission |
JP2005030422A (en) * | 2003-07-07 | 2005-02-03 | Fuji Photo Film Co Ltd | Strip material delivery device |
PL2276990T3 (en) * | 2008-03-24 | 2020-08-10 | Prime Datum, Inc. | Integrated fan drive system forair-cooled heat exchanger (ache) |
JP6645835B2 (en) * | 2016-01-06 | 2020-02-14 | バンドー化学株式会社 | Auto tensioner |
-
2017
- 2017-11-20 JP JP2017222851A patent/JP2019094940A/en active Pending
-
2018
- 2018-11-19 TW TW107141040A patent/TW201923256A/en unknown
- 2018-11-19 TW TW107215677U patent/TWM577458U/en unknown
- 2018-11-28 WO PCT/IB2018/059406 patent/WO2019097501A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2019097501A1 (en) | 2019-05-23 |
JP2019094940A (en) | 2019-06-20 |
TW201923256A (en) | 2019-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWM577458U (en) | Belt driving mechanism for blower of cooling tower | |
US20130055748A1 (en) | System for environmental protection of a heat exchanger | |
JP5018594B2 (en) | Ventilation equipment | |
CA1161282A (en) | Drive systems | |
WO2020110209A1 (en) | Belt transmission mechanism for cooling tower air blower | |
KR880002617B1 (en) | Heat exchanger ribbon slitting device and method | |
WO2021201248A1 (en) | Belt transmission mechanism for cooling tower blower | |
KR101350698B1 (en) | Air conditioner has a built-in fan capable tension adjustment and cooling | |
ITTO20080303A1 (en) | AIR CONDITIONER EQUIPPED WITH DOUBLE WALLS OPERATED INDEPENDENTLY | |
US20090011885A1 (en) | Rotary Regenerative Heat Exchange Wheel Assembly with Improved Flexible Drive Belt Link for Easy Assembly and Disassembly | |
US8608602B2 (en) | Belt clutch | |
KR100411791B1 (en) | Ceiling embedded type air conditioner | |
CN220379338U (en) | Tripod head device | |
KR101557205B1 (en) | Flat Belt Drive misalignment Prevention Auto Tensioner | |
JP2000198340A (en) | Air conditioner for vehicle | |
JPH11247787A (en) | Blower | |
CN219483490U (en) | Cleaning device for cooling tower and cooling tower | |
CN212511437U (en) | Air conditioner indoor unit and air conditioner | |
US20090320323A1 (en) | Device with a drum and flexible belts | |
CN219232873U (en) | Silica gel coating device for silica gel cloth | |
JP3778301B2 (en) | Belt tension device | |
KR102372511B1 (en) | Vibration reduction device | |
KR20050064187A (en) | Device for controlling tention of velt in apparatus of fan | |
KR0158345B1 (en) | Engine room grill of variable type for a bus | |
JP3361039B2 (en) | Rotary matrix type air conditioner |