JB/T 53063-1999 General Purpose Centrifugal Fan Product Quality Classification JB/T53063-1999 Standard Download Decompression Password: www.bzxz.net

The People's Republic of China Mechanical Industry Standard General Purpose Centrifugal Fans
Product Quality Classification
(Internal Use)
This standard is a revision of
This standard and
referenced standards
This standard and
"General Purpose Centrifugal Fan Product Quality Classification". Compared with
This standard and
referenced standards
This standard and
"Ventilator Vibration Detection and Limits"
"Industrial Ventilator Noise Limits"
"Ventilator Rotor Balance"
Product Quality Grade Indicators
This standard and
When revised.
This standard replaces
the unreferenced standard
《Fan Noise Limits》
《Fan Rotor Balance》
from the date of implementation, the quality grade indicators such as total pressure and static pressure deviation, effective value of vibration velocity, etc. are all adapted to this standard proposed and managed by the National Technical Committee for Fan Standardization. The responsible drafting unit of this standard: Shenyang Blower Research Institute. The main drafters of this standard: Guo Qingfu, Chen Fengyi, Chen Mingliang. Scope
Industry
General purpose centrifugal fans
Product quality classification
(internal use)
This standard specifies the quality grade, test and inspection methods, and sampling and evaluation methods of general purpose centrifugal fans. This standard applies to
products (hereinafter referred to as fans).
Cited standards
The provisions contained in the following standards for general-purpose centrifugal fans specified in "General-purpose centrifugal fans, technical conditions" constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. Test methods for aerodynamic performance of fans
Noise measurement methods for fans and Roots blowers Field test of fans
Technical conditions for general-purpose centrifugal fans
Vibration detection of fans and their limits
Noise limits for industrial fans
Rotor balance of fans
Product quality level
Fan products should be designed and manufactured according to the provisions of
, and divided into three levels of qualified products, first-class products and superior products according to their quality levels. The supporting products and purchased parts of the fan, such as motors, rolling bearings, etc., should meet the requirements of the quality level achieved by the fan. The quality of the fan production process should be stable, and its product grade indicators should comply with the provisions of the table. The key project qualification rate of the main parts of the fan should reach, and its assessment items are:
) The matching size with the rolling bearing;
) The rotor balance quality grade.
The main project qualification rate of the main parts of the fan should comply with the provisions of the table, and its main items are:) Dimension tolerances marked with matching requirements;) Items marked with geometric tolerances;
) Items with the arithmetic mean deviation value of the surface roughness parameter profile less than or equal to;
) The gap between the blade profile, the air inlet camber profile and the sample;) Blade installation angle;
National Machinery Industry Bureau
) The difference between the two pitches of any three adjacent blades at the outer circle;) Impeller outlet width, casing width.
Assessment items
Total pressure internal efficiency deviation
Total pressure deviation (at specified flow rate)
Static pressure deviation (at specified flow rate)
Noise (specific sound level)
Balance quality grade
Effective value of vibration velocity
First overhaul period
Qualified rate of major items
Qualified products
Product quality grade
First-class products
Within months)
Total pressure internal efficiency deviation, total pressure and static pressure deviation should be assessed within the fan working area. Deviation measured value - standard value
Standard value
Standard value shall be based on the performance curve that can be confirmed by the manufacturer's sampleTest and inspection method
Unless otherwise specified in the contract, the aerodynamic performance test of the fan shall be carried out in accordance with the provisions of the contract. The on-site aerodynamic performance test of the fan shall be carried out in accordance with the provisions of the contract. The noise test of the fan shall be carried out in accordance with the provisions of the contract. The balance test of the fan rotor shall be carried out in accordance with the provisions of the contract. The vibration speed of the fan shall be carried out in accordance with the provisions of the contract. The ... Sampling and Assessment Methods
Sampling Methods
Each single-unit product should be inspected. Products produced in batches can be inspected one by one or by sampling. When conducting sampling inspections, the samples should be products within the assessment period and can be randomly selected within the assessment batch.
When the enterprise conducts self-inspection of product quality grades, sampling shall be carried out according to the provisions of the table. When the superior or relevant departments conduct grade assessments on the enterprise's products, the sampling plan shall be determined by the superior or relevant departments. Batch (units)
Sampling quantity (units)
Qualified judgment number
Unqualified judgment number
According to the results of the sampling inspection, if the number of unqualified products in the sampling is less than or equal to the qualified judgment number, the batch of products is judged to be qualified
, and if the number of unqualified products in the sampling is greater than or equal to the unqualified judgment number, the batch of products is judged to be unqualified. Evaluation method
For the evaluation of fan products when they are excellent, high-quality pricing, and enterprises are upgraded, the first overhaul period is a necessary condition. However, for the evaluation of fan products leaving the factory, the first overhaul period may not be evaluated temporarily. To evaluate the quality grade of fan products, they must meet the technical requirements of all the evaluation items of the grade to be rated as products of that grade. If the grades achieved by various indicators of the product are inconsistent, the grade is evaluated according to the lowest indicator achieved. The grade evaluation of a single product shall be carried out according to the corresponding product quality grading standards. All quality indicators must meet the requirements of the grading standards, and the lowest grade item shall be evaluated as the grade of the product. Method for evaluating the grade of batch products
The grade of products is evaluated by checking each unit one by one. After the whole batch is qualified after checking each unit one by one, the grade rate of the whole batch of products is determined according to the number of first-class products and superior products, and the grade of the batch of products is evaluated by the grade rate. First-class products: when the first-class rate (the sum of superior products and first-class products as a percentage of batch products) is equal to or greater than, and the rest are qualified products, the batch of products is evaluated as first-class products. Superior products: when the superior rate (the percentage of superior products in batch products) is equal to or greater than, and the rest are first-class products and qualified products, the batch of products is evaluated as superior products.
Product grade evaluation for sampling inspection: the sampled products are inspected one by one and the grade of the whole batch of products is evaluated after the batch of products are qualified. The whole batch of products is evaluated. After the assessment of the whole first-class products: the first-class product rate (the sum of superior products and first-class products as a percentage of the number of sampled products) is equal to or greater than
, and the rest are qualified products, then this batch of products is assessed as first-class products. Superior products: the superior product rate (the percentage of superior products in the number of sampled products) is equal to or greater than, and the rest are first-class products and qualified products: then this batch of products is assessed as superior products.
Relevant regulations on quality index testing
Quality index testing should comply with the provisions of relevant product standards and performance testing methods. The performance index test of fans with machine numbers below No can be carried out in the manufacturing plant or at the superior quality supervision and inspection department. For fans with machine numbers greater than or equal to No, their aerodynamic performance is allowed to be tested at the product use site; it can also be converted according to the data of the model test. The conditions of the model test or field test should comply with the relevant standards, and the performance data obtained from the test can represent the performance of products of the same variety and specification.
People's Republic of ChinaWww.bzxZ.net
Mechanical Industry Standard
General Purpose Centrifugal Fan
Product Quality Classification
(Internal Use)
Published and Distributed by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(Beijing Shouti South Road
First Edition in Year
Once Printed
Mechanical Industry Standard Service Network:
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.