JB/T 53269-1999
Axial Flow Fan for Cooling Tower - Product Quality Grading (Internal Use)
冷却塔轴流式通风机 产品质量分等 （内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 通风机质量等级 → 4 试验与检验方法 → 5 抽样、评定方法 Foreword → 1 Scope → 2 Normative References → 3 Quality Grades of Fan → 4 Test and Inspection Methods → 5 Sampling and Evaluation Methods
Scope
This standard specifies the product quality grades, test and inspection methods, and sampling and evaluation methods for axial flow fans for cooling towers (hereinafter referred to as fans).
本标准规定了冷却塔轴流式通风机（以下简称通风机）的产品质量等级，试验与检验方法和抽样、评定方法。
Normative References
Keywords
Application Summary AI generated
Manufacturers of axial flow fans for cooling towers use this standard to classify product quality into grades (qualified, first-class, superior). Quality inspection departments and customers rely on it for performance testing and acceptance. The standard ensures product reliability and consistency by defining key metrics such as efficiency, vibration, and noise.
冷却塔轴流式通风机的制造商使用本标准来划分产品的质量等级（合格品、一等品、优等品）。质检部门和用户依据本标准对通风机进行性能测试和验收。该标准通过明确效率、振动、噪声等关键指标，确保了产品的可靠性和一致性。
AI Summary AI generated
This standard specifies the product quality grading requirements for axial flow fans for cooling towers, classifying products into three grades: qualified, first-class, and superior. It defines key assessment indicators such as total pressure efficiency, flow deviation, vibration velocity, first major overhaul period, and pass rate of main items, along with corresponding test and inspection methods (e.g., aerodynamic performance test, noise test, vibration detection). Additionally, it provides sampling and grade evaluation methods for single and batch fans. The standard is used for quality control and acceptance of cooling tower axial flow fans.
本标准规定了冷却塔轴流式通风机的产品质量分等要求，将产品分为合格品、一等品和优等品三个等级。标准明确了全压效率、流量偏差、振动速度、首次大修期和主要项目合格率等关键考核指标，并给出了相应的试验与检验方法（如空气动力性能试验、噪声试验、振动检测等）。此外，还规定了单台和批量通风机的抽样与等级评定方法。该标准适用于冷却塔轴流式通风机的质量控制和验收。
Key Sentences extracted from text
本标准规定了冷却塔轴流式通风机（以下简称通风机）的产品质量等级，试验与检验方法和抽样、评定方法。
通风机应按JB/T 9099 的规定设计、制造，根据其质量水平分为合格品、一等品和优等品三个等级。
通风机主要零部件的关键项目的合格率应达到100%，其考核项目为：a）与滚动轴承的配合尺寸；b）通风机叶片安装角度。
通风机的空气动力性能试验（包括全压效率和流量的考核）应按GB/T 1236 进行测试，其最高全压效率和流量偏差等级按表1 的规定。
单台通风机的等级判定，按相应的产品质量分等标准进行。各项质量指标都必须达到分等标准的规定，并以其中项次最低的等级判定为产品的等级。
This standard specifies the product quality grades, test and inspection methods, and sampling and evaluation methods for axial flow fans for cooling towers (hereinafter referred to as fans).
Fans shall be designed and manufactured in accordance with JB/T 9099, and are divided into three grades according to their quality level: qualified product, first-class product, and superior product.
The pass rate of key items of main components of the fan shall reach 100%, and the inspection items are: a) fitting dimensions with rolling bearings; b) installation angle of fan blades.
The aerodynamic performance test of the fan (including the assessment of total pressure efficiency and flow rate) shall be tested in accordance with GB/T 1236, and the maximum total pressure efficiency and flow deviation grade shall be in accordance with Table 1.
The grade determination of a single fan shall be carried out in accordance with the corresponding product quality grading standard. All quality indicators must meet the requirements of the grading standard, and the grade of the product shall be determined by the lowest grade among the items.
Standard Timeline
Changes from replaced version:
- 引用标准更新：JB/T 6886—1993代替JB/TQ 332，JB/T 8689—1998代替JB/TQ 334，JB/T 8690—1998代替JB/TQn 341，JB/T 9099—1999代替JB 1416，JB/T 9101—1999代替JB/TQ 337
- 振动速度有效值做了适当修改
- Updated normative references: JB/T 6886-1993 replaces JB/TQ 332, JB/T 8689-1998 replaces JB/TQ 334, JB/T 8690-1998 replaces JB/TQn 341, JB/T 9099-1999 replaces JB 1416, JB/T 9101-1999 replaces JB/TQ 337
- Appropriate modification of vibration velocity RMS value