This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of axial flow fans for HVAC and air conditioning. This standard applies to fans made of metal with an air volume range of 120 to 460 000 m3/h and a static pressure range of 30 to 350Pa. Fans made of non-metallic materials can also be used as reference. JB/T 6411-1992 Axial flow fan for HVAC and air conditioning JB/T6411-1992 Standard download and decompression password: www.bzxz.net
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Mechanical Industry Standard of the People's Republic of China Axial Flow Fans for HVAC 1 Subject Content and Scope of Application JB/T 6411-92 This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of axial flow fans for HVAC (hereinafter referred to as "fans"). This standard applies to fans made of metal with an air volume range of 120-~460000m2/h and a static pressure range of 30~~350Pa. Fans made of non-metallic materials can also be used for reference. 2 Reference standards GB1236 GB 2888 Test method for aerodynamic performance of ventilator Noise measurement method for ventilator and Roots blowerTechnical requirements for aluminum alloy castings GB9438 GB10080 GB10178 Safety requirements for ventilators for air conditioning Field test of ventilator GB/T 13306 Signage ZB J72 017 ZBJ72026 ZB J72029 ZB J72 038 ZB J72 039 JB/T 6445 JB/TQ334 JB/TQ 337 IB/TQ444 3Type Technical conditions for coating of heating, ventilation and air conditioning equipmentGeneral technical conditions for packaging of heating and cooling ventilation equipmentAppearance quality and cleanliness of heating and cooling ventilation equipmentQuality inspection of welding of fans Technical conditions for riveted and welded parts of fans Test method for overspeed of impeller of fans Vibration accuracy of fans Balance of rotor of fans Technical conditions for steel castings for fans 3.↑Blowers are divided into two types according to their use: ordinary type (Figure 1) and tower type (Figure 2): fans are divided into four types according to the transmission mode: direct connection with motor, pulley drive, coupling drive and gear drive. The type code of fans shall be in accordance with the provisions of Table 1. Figure 1 Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 20, 1992, and sold on January 1, 1993 323 . Purpose Transmission mode Item 3.2 Model compilation method Item Ordinary type Tower type Motor direct connection Pulley drive Coupling drive Gear drive JB/T 6411--92 Figure 2 Table 1 Symbol 2 I. A B C D G The model of the fan is composed of uppercase Chinese pinyin letters and Arabic numerals. The specific expression method is as follows: Design sequence number: expressed by numbers Transmission mode code: see Table 1|| tt||Machine number, NoImpeller diameter, dm (see Table 2)Hub ratio code: hub ratio × 100 Application code: see Table 1 Model example: Structural features Pulley in the middle of the bearing Pulley outside the bearing Z38N5A-1: Impeller diameter is 500mm, hub ratio is 0.38, and it is a common motor direct-connected fan designed for the first time. L40No20G-2: Impeller diameter is 2000mm, hub ratio is 0.40, and it is a tower gear-driven fan designed for the second time. 4 Basic parameters 4.1 The machine number and impeller diameter of the fan shall comply with the provisions of Table 2. Table 2 Machine No. No 2 2.12 2.14 324 Impeller (blade outer edge) diameter 200 212 214 Machine No. N 2.36 2.50* 2.65 Impeller (blade outer edge) diameter 236 250 265 Machine No. No 2.8 3.0||t t||3.15* Impeller (blade external extension) diameter 280 300 315 Machine number N 3.35 3.55 3.75 mm Impeller (blade external edge) diameter 335 355 375 Machine number No 4* 4.25 4.5 4.75 5 5.3 5. 6 6 6.3 6.7 7.1 7. 5 Impeller (blade outer edge) diameter 400 425 450 475 500 530 560 600 630 670 710 750 Machine number No 8* 8.5 9 9.5 10 10.6 11.2 11.8 12.5* 13.2 14 15 Note: The machine number with * is preferred. 4.2 The number of blades of the fan shall be in accordance with the provisions of Table 3 3 5 Technical requirements 5.1 General requirements 4 JB/T 6411-92 Continued Table 2 Impeller (blade outer edge) diameter 800 850 900 950 1000 1060 1120 1180 1250 1320 1400 1500 5 Machine number N 1 6* 17 18 19 20 21.2 22.4 23.6 25 26.5 28 30 Table 3 6 Impeller (blade outer edge) diameter 1600 1700 1800 1900 200 0 2120 2240 2360 2500 2650 2800 3000 8 Machine number N 31.5* 33.5 35.5 37.5 40° 42.5 45 47.5 50||tt ||10 mm Impeller (blade outer edge) diameter 3150 3350 3550 3750 4000 4250 4500 4750 5000 16 5.1.1 The fan shall be manufactured in accordance with the provisions of this standard and in accordance with the drawings and technical documents approved through the prescribed procedures or according to the agreement between the supplier and the buyer. 5.1.2 The materials and accessories used in the fan shall comply with the provisions of the relevant standards and meet the requirements of the conveying medium and operating conditions. 5.2 Product performance 5.2.1 The fan shall be subjected to an aerodynamic performance test and a complete aerodynamic performance curve shall be drawn. 5.2.2 regulations. Within the working range at rated speed, the deviation between the measured aerodynamic performance curve and the typical performance curve of the fan is as shown in Table 4 of Table 4 Machine number NG The measured static pressure efficiency Ratio to rated static pressure efficiency, % static pressure deviation 3.35 92 3.55~3.75 93|| tt||4~~4.25 ≥94 5 4.5~~4.75 ≥95 5 ≥96| |tt||>5 98 5.2.3 The fan noise spectrum curve should be drawn. The noise of ordinary fans should not exceed 32dB(A); the noise of tower fans should not exceed 28dB(A). 5.2.4 The bearing temperature or the oil temperature in the gearbox should not exceed 80C. 5.2.5 The effective value of the vibration speed of the fan (root mean square speed) is not greater than 5.6mm/s. 5.3 Service life 5.3.1 The service life of the fan and its auxiliary equipment shall comply with the requirements of Table 5. 325 T rm. Machine number No >8~20 20 JB/T 6411--92| |tt||Table 5 Service life 8 7 10 5.3.2 Before the first overhaul period for fans with machine number greater than 8 The safe operation time should be no less than 18000h. 5.4 Safety requirements The safety requirements of fans are in accordance with the regulations of GB10080. 5.5 Requirements for parts 5.5.1 Impeller 5.5.1.1 The balance requirements of the impeller are as follows: Reason. The machine number is not greater than 20, and the dynamic balancing accuracy is not less than G4.0; the machine number is greater than 20, and the hub dynamic balance accuracy reaches G4.0 before static balancing of the impeller. b. 5.5.1.2 The impeller should have sufficient strength and rigidity to prevent deformation during handling and operation. 5.5.1.3 The welding and riveting quality of the impeller should comply with the regulations of ZBJ72038 and ZBJ72039. 5.5.1.4 The cast impeller shall undergo an overspeed test in accordance with the provisions of JB/T6445. 5.5.1.5 If the machine number is not greater than 16, the impeller blades are fixed; if the machine number is greater than 16, the impeller blades are adjustable. The blades of the impeller should be evenly distributed, and the gap between the profile line and the template, the pitch deviation and the installation angle deviation should comply with the provisions of ZBJ720395. 5. 1.6 . 5.5.2 Chassis 5.5.2.1 The casing of the ordinary fan is made of carbon steel plate, and its manufacturing accuracy should comply with the regulations of ZBJ72039. 5.5.2.2 For direct-coupled motor fans, a motor support with sufficient strength and stiffness should be installed in the casing. The height of the motor support should be such that the center of the motor is consistent with the center of the casing. Use adjustment shims between the motor and the support to adjust the center height of the motor, but the shims must not exceed two layers. 5.5.3 The materials used for rotating parts should have quality guarantee certificates or managerial inspections and inspection reports. 5.5.4 Aluminum alloy castings should comply with the regulations of GB9438; steel castings should comply with the regulations of JB/TQ444. 5.6 Appearance quality 5.6.1 The painting of the fan should comply with the regulations of ZBJ72017. 5.6.2 The appearance quality of the fan should comply with the relevant regulations of ZBJ72029. 5.7 Warranty period Provided that the user abides by the provisions of the product manual, within 18 months from the date of shipment from the manufacturer, the actual use time does not exceed 8000h, if the product is damaged or inoperable due to poor manufacturing quality or During normal operation, the manufacturer should repair or replace it free of charge (excluding wearing parts). 6 Test methods 6.1 The static and dynamic balance of the impeller shall be in accordance with the provisions of JB/TQ337. 6.2 After the temperature rise stabilizes, the continuous operation test time of the fan should be no less than 20 minutes. The bearing temperature or the oil temperature and dynamic speed in the gear box are measured. The vibration speed is measured according to the provisions of JB/TQ334. 6.3 The aerodynamic performance test of the fan shall be in accordance with the provisions of GB1236. Fans with machine numbers greater than 12 shall be tested on site in accordance with GB10178. 6.4 The noise measurement of the fan shall be in accordance with the provisions of GB2888. 326 | | tt | | 7 | | tt | Factory. 7.2 For the specified test and inspection items, there should be test reports or inspection records. 7.3 Inspection is divided into three types: type inspection, factory inspection and sampling inspection. Various inspection items are as specified in Table 6. Table 6 item operation test item vibration speed effective value . Sound Noise Input electric power Bearing temperature or gearbox oil temperature Balance test of rotating parts Aerodynamic performance test Appearance inspection 7. 3. 1 a. b. c. 7.3.2 7.3.3| | tt | Old products produced by transferred factories; ANg Factory inspectionbZxz.net N8~N20 After formal production, when the structure, materials and processes have undergone major changes, which may affect product performance; product When it was produced again three years after it was discontinued. Every product should undergo factory inspection. The sampling inspection regulations are as follows: Fans produced in batches should undergo routine sampling inspection to check the stability of the production process; the number of products of the same model within one year is regarded as an inspection batch, and the sampling time should be The equilibrium distribution is in 1a; the inspection plan is based on the one-time sampling plan specified in Table 7. Table 7 Machine number NO A10 10~~23.6 2535.5 37.5~50 Batch ≤1000 >1 000~2 000 500 >500-~1 000 300 >300~600 50 >50~100 Sampling quantity 2 5 2 5 2||tt ||5 2 5 Pass judgment number A. 0 1 0 1 7.4 The aerodynamic performance curve of the sampling fan should be inspected according to the typical performance curve. 7.5 The noise measurement of the fan should be carried out simultaneously with the aerodynamic performance test. 8 Marking, Packaging and Storage 8.1 Mark >N20 台 Number of unqualified judgment R. 1 2| |tt||2 1 2 8.1.1 Fans or reducers, oil pumps, fuel tanks and other independent components should have nameplates in obvious locations. The size and technical requirements of the nameplates should be Comply with the regulations of 327 t GB/T13306. Nameplate contents include: a. b. c. d. e. 8.1 .2 , etc.). Product name and model; JB/T 6411—92 Main characteristic parameters (air volume, static pressure, noise, speed, motor power)); Product number: ||tt ||Manufacturing date; Manufacturer name. On the fan or its parts and components, there should be signs of the working status or adjustment position (such as the rotation direction of the rotor and the oil level line) as needed. 8.1.3 Packing box markings should comply with the regulations of ZBJ72026. 8.2 Packaging and storage 8.2.11 The fans should be packed according to the number, item and number of pieces specified in the packing list. The packaging should comply with the provisions of ZBJ72026 8.2.2. The storage space of the fan should be dry and ventilated, free of corrosive gases, and protected from rain and sunlight. Additional notes: This standard is proposed and administered by the Hefei General Machinery Research Institute of the Ministry of Mechanical and Electronics Industry. This standard is drafted by Shangyu Fanguang and Shanghai Jiao Tong University. The main drafters of this standard are Xu Cangen, Ren Shiyao, and Dong Hanxiang. 328 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.