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轴流风机轴流风机型号、用途、性能及轴流风机参数——（浙江聚英风机工业有限公司提供）一、轴流风机型号名称、用途、性能■管道加压轴流风机●JSF轴流通风机（SDF）●大风量轴流风机（JSF-Z）JSF轴流通风机是一种高轮毂比设计的新型节能管道加压风机，具有噪声低、风压适中、气动性能范围广、安装简单等特点，广泛应用于民用、商业及工业厂矿企业建筑工程的管道加压送排风系统。
JSF风机有两种叶轮结构形式，JSF-A采用模压圆柱形轮毂式叶轮，具有效率高、风压大等特点。
JSF-Z采用压铸铝合金叶轮，机翼型前掠扭曲可调叶片，具有噪声低、外形美观、铝质叶轮的防腐防爆性能优等优点，常用于机组设备冷却、机械生产线的工艺送风。
本系列风机一般为电机内置直联传动形式，也可做成电机外置皮带传动结构形式，用于输送特殊气体介质的场所，如厨房排油烟、工业热气等。
■边墙壁式轴流风机●DFBZ低噪声方形壁式轴流风机DFBZ系列风机采用高效低噪声轴流叶轮、风机专用电机直联传动，方形消音型外壳（可进一步降低风机噪声；整机制成方形，墙体预留方孔简单，安装方便）。
出风口装有铝合金自垂百叶（可防止室外雨水、灰尘和自然风向室内倒灌）；具有明显的外形美观，噪声低、运行平稳、安装牢固等优点，广泛适用于民用商用建筑工程和厂矿企业车间的低噪声壁式排风。
可根据使用场合要求制成防爆防腐型风机。
本系列风机一般配用三相电机，按用户要求可对0.55kW以下配用单相电机。
●DWEX边墙风机（WEX）DWEX系列风机采用先进的前掠型叶片、低噪音的外转子或内转子风机专用电机直联传动，方形外壳设计可以方便地安装在混凝土墙、砖墙或轻钢压型墙板上，方形防雨罩结构牢固，外形美观。
具有噪声低、风量大、运行可靠、性能参数范围广、安装简便等特点，广泛应用于厂矿企业车间和民用、商用建筑工程的边墙壁式通风换气。
根据输送介质的要求，可制成防腐、防爆型。
DWEX(WEX)系列风机一般用于边墙壁式排风，配设45°防雨罩（或特殊制造成60°）和防虫网（夜间可防止昆虫循灯光飞入车间）。
风机静压、动压、全压、余压的概念[字号:大中小] 2014-08-09 阅读次数：19a. 静压(Pi)由于空气分子不规则运动而撞击于管壁上产生的压力称为静压。
计算时，以绝对真空为计算零点的静压称为绝对静压。
以大气压力为零点的静压称为相对静压。
空调中的空气静压均指相对静压。
静压是单位体积气体所具有的势能，是一种力，它的表现将气体压缩、对管壁施压。
管道内气体的绝对静压，可以是正压，高于周围的大气压；也可以是负压，低于周围的大气压。
b. 动压(Pb) 指空气流动时产生的压力，只要风管内空气流动就具有一定的动压。
动压是单位体积气体所具有的动能，也是一种力，它的表现是使管内气体改变速度，动压只作用在气体的流动方向恒为正值。
c. 全压(Pq)全压是静压和动压的代数和： Pq＝Pi十Pb 全压代表单位气体所具有的总能量。
若以大气压为计算的起点，它可以是正值，亦可以是负值。
d. 机外余压机外余压的概念一般来自厂商样本样本上所提供的机外余压一般是考虑机组本身的压力损失后所能提供的全压，关于机外余压到底是机外全压还是机外静压？可以理解为机外全压，写成机外静压是测试时通常把动压看为0。
可见，机外余压的概念并非一个标准性概念,但必然是考虑机组本身的压力损失后所能提供的全压二.静压是由于分子运动力产生的对壁面的压能，在流场内各点大小都一致；动压是因为流体动量形成的压能，仅在迎着来流方向存在。
这是一对理论范畴。
全压是静压和动压的总和，反应了流体的做功能力水平。
在流体流动过程中，扣除阻力损失后，静压和动压会相互转化。
并不是不变的。
机外余压是风机克服自身阻力损失后的全压值，即进出口全压差。
风机出口风速较高，动压也较大，静压相对较低；但像有的AHU出口马上就进入一个静压箱，则在静压箱内几乎所有的风机能都转化为静压了。
所以我们一般说的风机压头都是说全压，反应的是这台风机的做功能力。
说风机动压和静压都是相对场合的说法，有特定条件的。
风机基础知识风机基础知识⽬录风机的定义 (2)风机的分类 (2)叶轮分类 (2)轴流风机 (2)离⼼风机 (2)混流风机 (3)⽤途分类 (3)公司系列分类 (3)连接⽅式分类 (4)安装位置分类 (5)风机的常⽤参数 (5)风机相似率及计算公式 (8)风机基本零部件的认知和关键质量指标 (9)风机配套 (17)风机旋向的认知 (18)常⽤单位的换算 (18)风机的选型注意点 (19)风机基础知识⼀、风机的定义风机是将旋转的机械能转换成流动空⽓总压增加⽽使空⽓连续运动的动⼒机械。
另外也可以说风机是将旋转的机械能转换成⽓体的动能和势能,并将⽓体输送出去的⼀种动⼒机械。
⼆、风机的分类a)叶轮分类根据⽓流运动的特点分类也就是根据叶轮形式来分类可以分为离⼼风机、轴流风机、混流风机。
（⼀）轴流风机轴流叶轮的进风⽅向和出风⽅向相同。
⼀般⽤于风量较⼤，风压较底的场合。
英飞产品中轴流风机有：RTA/RSA、WEX/WSP、IAS、IA T等。
英飞边墙轴流风机（WEX/WSP）风量⼤，压⼒低，噪⾳低，使⽤前掠型叶⽚。
管道轴流风机风量⼤，压⼒相对较⾼，⼀般使⽤CAD流场模拟技术优化设计的钢制叶⽚或进⼝“⼩旋风”叶轮。
（⼆）离⼼风机离⼼叶轮的进风⽅向和出风⽅向呈90°。
⼀般适⽤于较⾼压⼒，较⼤风量的场合。
英飞产品离⼼风机：CBD/CFD、BC系列、RTC、ISQ、CUS、RSC、ICC 等。
离⼼叶轮可分为前弯叶轮、后倾叶轮、后弯叶轮。
1、前弯叶轮：⽓流⽅向和叶⽚的线速度⽅向夹⾓为锐⾓。
特点：低转速，⼤风量，低静压（相对后倾，后弯叶轮），成型⼯艺简单，成本低。
前弯叶轮转速过⾼会造成电机过载，所以使⽤前弯叶轮的风机不允许空载运⾏。
2、后倾叶轮：⽓流⽅向和叶⽚的线速度⽅向的夹⾓为钝⾓，叶⽚为直板形式。
特点：⾼转速，转速范围宽，风量⼩，⾼静压，不过载，效率⾼。
（相对前弯叶轮做⽐较）3、后弯叶轮：⽓流⽅向和叶⽚的线速度⽅向的夹⾓为钝⾓，叶⽚为曲⾯形式。
基于国家对机电产品能效等级的要求, 以及国际通风设备发展趋势的深刻了解，风力佳 产品广泛采用先进的设计理念和质量规范，为客户 创造实际的经济效益。
SBS/F 边墙送/排风机融合更多的现代工业设计理念，符合现代建筑美学的要求，在性能上具有更低的能耗，噪声。
且结构简单，易于安 装与日后维护。
目前在工业厂房，建筑楼宇等更广泛的场合普遍取代原来的轴流风机。
是最为常用的一般用途送排风机。
叶轮采用CAD 流场模拟技术优化设计的机翼型铝叶轮，保证了叶轮的气体动力特性优异。
每个叶轮均消除应力处理 后经过静态与动态平衡，坚持做到ISO1940标准的平衡等级G2.5水平。
从而降低振动，减少噪声，延长轴承使用 寿命。
电机选用国家II 级能效电机，防护等级IP54 绝缘等级F ,温升等级B 级。
针对不同客户需要，我们可以提供防爆电 机，变频电机，防爆变频电机，双速电机。
机壳为优质碳钢卷筒翻边成型，针对不同的使用环境，如在化工厂等 有腐蚀性气体的场合，我们可以提供不锈钢， 玻璃钢等防腐性强的材质。
SBS/F边墙送/排风机重力式止回阀，防鸟网，出风口防雨弯头为选配件，在订货时须标明。
SBS/F边墙风机性能参数表SBS/F风机外形尺寸表机号A B H L重量kg 20030035020060020 25035040020060023 30040045020060024 33045050020060026 35045050020060036 40050056025075038 45055061025075040 50060066025075044 55065071025075045 600700760400100050 630800860400100052 710850910510123055 800100010806501500125 900110011806501500178 1000120012806501500210。
轴流风机选型型参数精 Revised by BLUE on the afternoon of December 12,2020.轴流风机轴流风机型号、用途、性能及轴流风机参数——(浙江聚英风机工业有限公司提供一、轴流风机型号名称、用途、性能■ 管道加压轴流风机● JSF 轴流通风机(SDF● 大风量轴流风机(JSF-ZJSF 轴流通风机是一种高轮毂比设计的新型节能管道加压风机,具有噪声低、风压适中、气动性能范围广、安装简单等特点,广泛应用于民用、商业及工业厂矿企业建筑工程的管道加压送排风系统。
JSF 风机有两种叶轮结构形式, JSF-A 采用模压圆柱形轮毂式叶轮,具有效率高、风压大等特点。
JSF-Z 采用压铸铝合金叶轮,机翼型前掠扭曲可调叶片,具有噪声低、外形美观、铝质叶轮的防腐防爆性能优等优点,常用于机组设备冷却、机械生产线的工艺送风。
本系列风机一般为电机内置直联传动形式, 也可做成电机外置皮带传动结构形式, 用于输送特殊气体介质的场所,如厨房排油烟、工业热气等。
■ 边墙壁式轴流风机● DFBZ 低噪声方形壁式轴流风机DFBZ 系列风机采用高效低噪声轴流叶轮、风机专用电机直联传动,方形消音型外壳(可进一步降低风机噪声;整机制成方形,墙体预留方孔简单,安装方便。
出风口装有铝合金自垂百叶(可防止室外雨水、灰尘和自然风向室内倒灌 ;具有明显的外形美观,噪声低、运行平稳、安装牢固等优点, 广泛适用于民用商用建筑工程和厂矿企业车间的低噪声壁式排风。
可根据使用场合要求制成防爆防腐型风机。
本系列风机一般配用三相电机,按用户要求可对 0.55kW 以下配用单相电机。
● DWEX 边墙风机(WEXDWEX 系列风机采用先进的前掠型叶片、低噪音的外转子或内转子风机专用电机直联传动,方形外壳设计可以方便地安装在混凝土墙、砖墙或轻钢压型墙板上, 方形防雨罩结构牢固, 外形美观。
具有噪声低、风量大、运行可靠、性能参数范围广、安装简便等特点,广泛应用于厂矿企业车间和民用、商用建筑工程的边墙壁式通风换气。
风机静压、动压、全压、余压的概念[字号:大中小] 2014-08-09 阅读次数：19a. 静压(Pi)由于空气分子不规则运动而撞击于管壁上产生的压力称为静压。
计算时，以绝对真空为计算零点的静压称为绝对静压。
以大气压力为零点的静压称为相对静压。
空调中的空气静压均指相对静压。
静压是单位体积气体所具有的势能，是一种力，它的表现将气体压缩、对管壁施压。
管道内气体的绝对静压，可以是正压，高于周围的大气压；也可以是负压，低于周围的大气压。
b. 动压(Pb) 指空气流动时产生的压力，只要风管内空气流动就具有一定的动压。
动压是单位体积气体所具有的动能，也是一种力，它的表现是使管内气体改变速度，动压只作用在气体的流动方向恒为正值。
c. 全压(Pq)全压是静压和动压的代数和： Pq＝Pi十Pb 全压代表单位气体所具有的总能量。
若以大气压为计算的起点，它可以是正值，亦可以是负值。
d. 机外余压机外余压的概念一般来自厂商样本样本上所提供的机外余压一般是考虑机组本身的压力损失后所能提供的全压，关于机外余压到底是机外全压还是机外静压？可以理解为机外全压，写成机外静压是测试时通常把动压看为0。
可见，机外余压的概念并非一个标准性概念,但必然是考虑机组本身的压力损失后所能提供的全压二.静压是由于分子运动力产生的对壁面的压能，在流场内各点大小都一致；动压是因为流体动量形成的压能，仅在迎着来流方向存在。
这是一对理论范畴。
全压是静压和动压的总和，反应了流体的做功能力水平。
在流体流动过程中，扣除阻力损失后，静压和动压会相互转化。
并不是不变的。
机外余压是风机克服自身阻力损失后的全压值，即进出口全压差。
风机出口风速较高，动压也较大，静压相对较低；但像有的AHU出口马上就进入一个静压箱，则在静压箱内几乎所有的风机能都转化为静压了。
所以我们一般说的风机压头都是说全压，反应的是这台风机的做功能力。
说风机动压和静压都是相对场合的说法，有特定条件的。
1Model G/GB Centrifugal Roof Exhaust Fans®PN 471558Downblast Centrifugal Roof Exhaust FansModel G Direct DriveModel G is a direct drive downblast centrifugal exhaust fan. These fans are specifically designed for roof mounted applications exhausting relatively clean air. Performance capabilities range up to 4,300 cfm (7,305 m 3/hr) and up to 1 in. wg (249 Pa) of static pressure. The maximum continuous operating temperature is 180°F (82ºC). G models are available in 27 sizes with nominal wheeldiameter ranging from 8 to 24 inches (203 to 610 mm) (060 - 243 unit sizes). Each fan shall bear a permanently affixed manufacturer’s engraved metal nameplate containing the model number and individual serial number. All fans are UL/cUL listed Standard 705.1. Follow all local electrical and safety codes, as well asthe National Electrical Code (NEC) and the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electric Code (CEC) in Canada. 2. The rotation of the wheel is critical. It must befree to rotate without striking or rubbing any stationary objects.3. Motor must be securely and adequately grounded.4. Do not spin fan wheel faster than max cataloged fanRPM. Adjustments to fan speed significantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps.5. Do not allow the power cable to kink or come incontact with oil, grease, hot surfaces or chemicals. Replace cord immediately if damaged.6. Verify that the power source is compatible withthe equipment.7. Never open access doors to a duct while the fanis running.General Safety InformationOnly qualified personnel should install this fan. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions.Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity arepresent. If more information is needed, contact a licensed professional engineer before moving forward.Model GB Belt DriveGB Model Fans are belt drive downblast centrifugal exhaust fans. These fans are specifically designed for roof mounted applications exhausting relatively clean air. Performance capabilities range up to 44,700 cfm (75,950 m 3/hr) and up to 2.5 in. wg (623 Pa) of static pressure. The maximum continuous operating temperature is 180°F (82ºC). GB models are available in twenty sizes with nominal wheeldiameters ranging from 11 to 54 inches (279 to 1372 mm) (071-540 unit sizes). Each fan shall bear a permanently affixed manufacturer’s nameplate containing the model number and individual serial number. All fans are UL/cUL listed Standard 705.ReceivingUpon receiving the product, check to make sure all items are accounted for by referencing the bill of lading to ensure all items were received. Inspect each crate for shipping damage before accepting delivery. Notify the carrier if any damage is noticed. The carrier will make notification on the delivery receipt acknowledging any damage to the product. All damage should be noted on all the copies of the bill of lading which is countersigned by the delivering carrier. A Carrier Inspection Report should be filled out by the carrier upon arrival and reported to the Traffic Department. If damaged upon arrival, file a claim with carrier. Any physical damageto the unit after acceptance is not the responsibilityof Greenheck Fan Corporation.UnpackingVerify that all required parts and the correct quantityof each item have been received. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space. Confirmation of shipment(s) must be limited to only items on the bill of lading.HandlingG Direct DriveLift unit on to the roof utilizing hooks under the lip of the shroud. Evenly space the hooks around the shroud using a minimum of four lifting straps. Use a spreader bar to ensure the straps do not come in contact with the unit (see Figure 1).GB Belt DriveWhen lifting the unit on to the roof, use either the four lifting points on the drive frame or the two lifting points on the bearing plate if present (see Figure 2 for lifting points). Access to the drive frame is accomplished by removing the screws pointed out in Figure 3. The cover can then be removed and placed on a flat surface in an area protected from strong winds.When G/GB unit is on the roof, move fan to desired location using lifting points and fasten securely through mounting holes in base. Shims may be necessary depending upon roofing material thickness.The motor amperage and voltage ratings must be checked for compatibility to supply voltage prior to final electrical connection. For G/GB installations, the electrical supply should be routed through the conduit chase located between the curb cap and the bottom of the motor compartment. Wiring must conform to local and national codes.2Model G/GB Centrifugal Roof Exhaust FansStorageFans are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the fan and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user.IndoorThe ideal environment for the storage of fans and accessories is indoors, above grade, in a low humidity atmosphere which is sealed to prevent the entry of blowing dust, rain or snow. Temperatures should be evenly maintained between 30° to 110°F (-1° to43°C) (wide temperature swings may cause condensationand “sweating” of metal parts). All accessories must be stored indoors in a clean, dry atmosphere.Remove any accumulations of dirt, water, ice or snow and wipe dry before moving to indoor storage. To avoid “sweating” of metal parts, allow cold parts to reach room temperature. To dry parts and packages, use a portable electric heater to get rid of any moisture buildup. Leave coverings loose to permit air circulation and to allow for periodic inspection.The unit should be stored at least 3½ inches (89 mm)off the floor on wooden blocks covered with moisture proof paper or polyethylene sheathing. Aisles between parts and along all walls should be provided to permit air circulation and space for inspection.OutdoorFans designed for outdoor applications may be stored outdoors, if absolutely necessary. Roads or aisles for portable cranes and hauling equipment are needed.The fan should be placed on a level surface to prevent water from leaking into the fan. The fan should be elevated on an adequate number of wooden blocks so that it is above water and snow levels and has enough blocking to prevent it from settling into soft ground. Locate parts far enough apart to permit air circulation, sunlight and space for periodic inspection. To minimize water accumulation, place all fan parts on blocking supports so that rain water will run off.Do not cover parts with plastic film or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles.Fan wheels should be blocked to prevent spinning caused by strong winds.Inspection and MaintenanceDuring StorageWhile in storage, inspect fans once per month. Keep a record of inspection and maintenance performed.If moisture or dirt accumulations are found on parts,the source should be located and eliminated. At each inspection, rotate the wheel by hand ten to fifteen revolutions to distribute lubricant on motor. If paint deterioration begins, consideration should be given to touch-up or repainting. Fans with special coatings may require special techniques for touch-up or repair. Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean with lint-free cloths. Polish any remaining rust from surface with crocus cloth or fine emery paper and oil. Do not destroy the continuity of the surfaces. Thoroughly wipe clean with Tectyl® 506 (Ashland Inc.) or the equivalent.For hard to reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive,WD-40® or the equivalent.Removing From StorageAs fans are removed from storage to be installed in their final location, they should be protected and maintained in a similar fashion until the fan equipment goes into operation.3 Model G/GB Centrifugal Roof Exhaust FansInstallationTypical Roof Mounting Installation1. On the roof surface, cut an appropriate sized holeand follow manufacturer’s instructions on curbinstallation. Caulk and flash the curb to ensure awater tight seal.2. If unit is equipped with a backdraft damper, it shouldbe installed now.3. Remove motor cover. Access to the motorcompartment is accomplished by removing thescrews as shown in Figure 3.4. Only on GB Belt Drive fans. On the drive frame usethe lifting lugs to lift and place the unit on top of roofcurb. (Refer to Figure 2 on page 2).5. Secure fan to curb using a minimum of eight lagscrews, metal screws or the suitable fasteners.Shims may be required depending upon curbinstallation and roofing material.Note: Severe duty applications may requireadditional fasteners.6. Verify power line wiring is de-energized beforeconnecting fan motor to power source.7. Connect power supply wiring to the motor asindicated on the motor nameplate or terminal boxcover. Check the power source for compatibility withthe requirements of your equipment.8. Check fan wheel for free rotation, re-centerif necessary.9. Check all fasteners for tightness.10. Mount and wire safety disconnect switch undermotor cover. Wire control switches at ground level,refer to Figure 4.11. Replace motor cover.MOTORL1115/208-230/60/1208-230/460/60/3MOTORJ-BOXJ-BOXSUPPLY VOLTAGE SUPPLY VOLTAGEL2L1L2L3Typical Wiring DiagramFigure 44Model G/GB Centrifugal Roof Exhaust Fans5Model G/GB Centrifugal Roof Exhaust Fans6Model G/GB Centrifugal Roof Exhaust FansModel GBPre-Starting Belt Tension Checks8. Always loosen tension enough to install belts withoutstretching, see Figure 9.9. For units with two groove pulleys, adjust so thetension is equal in both belts.10. If adjustments are made, it is very important to checkthe pulleys for proper alignment. Misaligned pulleys lead to excessive belt wear vibration, noise andpower loss, see Figure 10.Pre-Starting Checks1. Check all fasteners and set screws for tightness. Thewheel should rotate freely and be aligned as shown in Figure 7 below. 2. Wheel position is preset and the unit is test run at thefactory. Movement may occur during shipment and realignment may be necessary. 3. Only G unit - Centering height alignment can beaccomplished by loosening the set screws in the wheel and moving the wheel to the desired position. 4. Only GB unit - Centering can be accomplished byloosening the bolts holding the drive frame to the shock mounts and repositioning the drive frame. 5. Only GB unit - Wheel and inlet cone overlap can beadjusted by loosening the set screws in the wheel and moving the wheel to the desired position. 6. Only GB unit - Fan RPM should be checked andverified with a tachometer. 7. Check wheel rotation (viewing from the shaft side)by momentarily energizing the unit. Rotation should be clockwise as shown in Figure 8 and correspond to rotation decal on the unit. If wheel rotation is incorrect, reverse two of the wiring leads or check motor wiring for single phase.7Model G/GB Centrifugal Roof Exhaust FansInspectionInspection of the fan should be conducted at the first 30 minute and 24 hour intervals of satisfactory operation.30 Minute IntervalInspect bolts, setscrews and motor mounting bolts. Adjust and tighten as necessary.24 Hour IntervalCheck all internal components. On GB unit only, inspect belt alignment and tension. Adjust and tighten as necessary.Maintenance: G / GBInstallation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and who are experienced with this type of equipment.Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior surfaces only. Removing dust buildup onmotor housing ensures proper motor cooling.Greasing of motors is only intended when fittings are provided. Many fractional horsepower motors are permanently lubricated and should not be lubricated after installation. Motors supplied with grease fittings should be greased in accordance with manufacturers’ recommendations. Where motor temperatures do not exceed 104ºF (40ºC), the grease should be replaced after 2,000 hours of running time as a general rule.Wheels require very little attention when moving clean air. Occasionally, oil and dust may accumulate causing imbalance. When this occurs, the wheel and housing should be cleaned to ensure smooth and safe operation.All fasteners should be checked for tightness each time maintenance checks are performed prior to restarting unit.A proper maintenance program will help these unitsdeliver years of dependable service.11. Belt tension can be adjusted by loosening fourfasteners on the drive frame, see Figure 11. The motor plate slides on the slotted adjusting arms and drive frame angles in the same manner.12a. Sizes 071-161: Belts should be tensioned justenough to prevent slippage at full load.Note: Belts should have a slight bow on the slack side while running at full load (see Figure 12a).12b. Sizes 180-540: Belt tension should be adjusted toallow 1⁄64 in. (0.397 mm) of deflection per inch of belt span. For example, a 15 in. (381 mm) belt span should have 15⁄64 in. (0.234 mm) (or about 1⁄4 in. (6 mm)) ofdeflection with moderate thumb pressure at mid-point between pulleys (see Figure 12b).13. The adjustable motor pulley is factory set for theRPM specified. Speed can be increased by closing or decreased by opening the adjustable motor pulley.14. Any increase in speed represents a substantialincrease in the horsepower required by the unit.15. Motor amperage should always be checked to avoidserious damage to the motor when speed is varied.Operation: G / GB1. Before starting up or operating fan, check allfasteners for tightness. In particular, check the setscrews in wheel hub. 2. While in the OFF position or before connecting thefan to power, turn the fan wheel by hand to be sure it is not striking the venturi or any obstacle. 3. Start the fan and shut it off immediately to checkrotation of the wheel with directional arrow in the motor compartment. 4. When the fan is started, observe the operation andcheck for any unusual noises. 5. With the system in full operation and all ductworkattached, measure current input to the motor and compare with the nameplate rating to determine if the motor is operating under safe load conditions. 6. Keep inlets and approaches to fan clean and freefrom obstruction.Belt/Bearing Maintenance GB Unit1. Belts tend to stretch after a period of time.They should be checked periodically for wear and tightness. When replacing belts, use the same type as supplied with the unit. 2. Matched belts should always be used on units withmulti-groove pulleys. 3. For belt replacement, loosen the tensioning deviceenough to allow removal of the belt by hand. 4. Once installed, adjust belts as shown in“Pre-Starting Checks.”5. Shaft bearings can be classified in twogroups: relubricating and non-relubricating. All non-relubricating bearings on model GB fans are factory lubricated and require no further lubrication under normal use (between -20º to 180ºF (-29º to 82ºC) in a relatively clean environment). 6. On GB belt driven fans, the standard cast pillowblock bearings are factory lubricated and are provided with external grease fittings. Annual lubrication is recommended, or more frequently if needed (See Table 2). Do not over-grease. Use only one or two shots of lubricant with a hand gun. Maximum hand gun rating is 40 psi. Rotate bearings during lubrication where good safety practice11. During the first few months of operation, checkbearing setscrews periodically to ensure tightness.12. If unit is to be left idle for an extended period,remove belts and store in a cool, dry place to avoid premature belt failure.Recommended Relubrication Frequency in MonthsNOTE: If unusual environment conditions exist (extreme temperature, moisture or contaminants) more frequent lubrication is required.A good quality lithium base grease, conforming to NLGI Grade 2 consistency, such as those listed here may be used.9Model G/GB Centrifugal Roof Exhaust Fans10Model G/GB Centrifugal Roof Exhaust FansCurb Cap/GB Belt Drive Centrifugal Roof Exhaust FanShaft PulleyBearings11Model G/GB Centrifugal Roof Exhaust Fans12471558 • Model G/GB IOM, Rev. 3, October 2010 Copyright 2010 © Greenheck Fan Corp.Greenheck Catalog G/GB provides additional information describing the equipment, fan performance, available accessories, and specification data.®Phone:(715)359-6171•Fax:(715)355-2399•E-mail:*********************•Website: WarrantyAMCA Publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans, provides additional safety information. This publication can be obtained from AMCA International, Inc. at: .Roof Curb Installation。
轴流风机轴流风机型号、用途、性能及轴流风机参数——（浙江聚英风机工业有限公司提供）一、轴流风机型号名称、用途、性能■管道加压轴流风机JSF轴流通风机（SDF）●●大风量轴流风机（JSF-Z）JSF轴流通风机是一种高轮毂比设计的新型节能管道加压风机，具有噪声低、风压适中、气动性能范围广、安装简单等特点，广泛应用于民用、商业及工业厂矿企业建筑工程的管道加压送排风系统。
JSF风机有两种叶轮结构形式，JSF-A采用模压圆柱形轮毂式叶轮，具有效率高、风压大等特点。
JSF-Z采用压铸铝合金叶轮，机翼型前掠扭曲可调叶片，具有噪声低、外形美观、铝质叶轮的防腐防爆性能优等优点，常用于机组设备冷却、机械生产线的工艺送风。
本系列风机一般为电机内置直联传动形式，也可做成电机外置皮带传动结构形式，用于输送特殊气体介质的场所，如厨房排油烟、工业热气等。
■边墙壁式轴流风机●DFBZ低噪声方形壁式轴流风机DFBZ系列风机采用高效低噪声轴流叶轮、风机专用电机直联传动，方形消音型外壳（可进一步降低风机噪声；整机制成方形，墙体预留方孔简单，安装方便）。
出风口装有铝合金自垂百叶（可防止室外雨水、灰尘和自然风向室内倒灌）；具有明显的外形美观，噪声低、运行平稳、安装牢固等优点，广泛适用于民用商用建筑工程和厂矿企业车间的低噪声壁式排风。
可根据使用场合要求制成防爆防腐型风机。
．本系列风机一般配用三相电机，按用户要求可对以下配用单相电机。
DWEX边墙风机（WEX）●DWEX系列风机采用先进的前掠型叶片、低噪音的外转子或内转子风机专用电机直联传动，方形外壳设计可以方便地安装在混凝土墙、砖墙或轻钢压型墙板上，方形防雨罩结构牢固，外形美观。
具有噪声低、风量大、运行可靠、性能参数范围广、安装简便等特点，广泛应用于厂矿企业车间和民用、商用建筑工程的边墙壁式通风换气。
根据输送介质的要求，可制成防腐、防爆型。
DWEX(WEX)系列风机一般用于边墙壁式排风，配设45°防雨罩（或特殊制造成60°）和防虫网（夜间可防止昆虫循灯光飞入车间）。
用途T35型轴流通风机是替代30K4型风机的新产品，T35主要是为一般工厂、仓库、办公室、住宅等场合的通风换气或加强暖气散热之用，若将机壳去掉，也可作自由风扇，亦可在较长的排气管道内间隔串联安装，以提高管道中的风压。
T35型轴流风机是在国外同类产品的基础上，通过模型试验研究，确定了风机叶型，采用了圆筒型轮毂结构，同时对电机进行了改型设计，减少了流动损失，因而使风机效率出口按圆面积提高到77%，按出口环面积计算提高到89.5%，噪声比A声降低了3.6d B,又增强了叶根处的强度，避免了叶片断裂现象。
BT35型防爆轴流通风机主要是排送含有易燃、易爆但无腐蚀性之气体，电机须用防爆电机，开关须用防爆开关或远离易爆点，在易爆区域内电线不许有接头。
通过T35、BT35风机的气体应无腐蚀性及显著粉尘，其温度不得超40℃。
BFT35主要是排送易燃、易爆且有腐蚀性之气体，但温度不得超过60℃。
型式本系列产品按叶轮直径不同共分为13种机号，依次排列为№2.8 、3.15 、3 .55 、4、4.5、5、5.6、6.3、7.1、8、9、10、11.2 等。
每一种机号又可安装成15°、20°、25°、30°、35°等5 种角度。
本系列产品均采用叶轮直接装在电动机轴上的直联结构。
在叶轮圆周速度不超过60m/S条件下配用三种转速：2900、1450、960r/min，面对进风口方向看叶轮为逆时针转动，进气方向在叶轮端。
风机出厂前，均经运转试验，确保运转平稳。
结构T35、B T35风机主要由叶轮、机壳、集风器等三部分组成。
B F T35风机主要由叶轮、机壳、集风器等组成，它们均为玻璃钢制成。
支架是由型材制成与风筒连接。
叶轮部—由叶片和轮毂组成，叶片均采用薄钢板制成，且按选定之安装角焊于轮毂上。
机壳部—由风筒，支架组成，均采用薄钢板及型材制成，风筒为圆筒型，与叶轮之间有一定间隙。
