An overview of the
With the rapid development of China's economy, compressor products in various fields have been widely used, the country and users on the quality of products also put forward more requirements.Market economy, import and export trade, product certification, license issuance, etc., all revolve around the theme of product quality.And support this and the important foundation compressor standard, more and more highlights its importance, also more and more attention and attention by all parties.Therefore, a comprehensive understanding of the industry's standard system, familiar with the standard content, a good application of standards, in order to improve the product quality of enterprises, strengthen the competitiveness of products in the market, access to the market, and expand international trade, are crucial.This article will systematically introduce the principle of the composition of the compressor standard system in our country, the level of the standard system, compressor of the content of the main criteria and scope of application, at the same time also to the national standards of compressor dynamic makes a brief account of the recent development in the compressor standards for the use of units and application can help and provide guidance for the related personnel.
1. Compressor standard system composition
(1) China's compressor standards and the formulation of the level
According to our country "standard law" regulation, our country compressor standard is divided into national standard, industry standard and enterprise standard 3.Among them, national and industrial standards should be followed or recommended for use throughout the country.National or industrial standards for these compressors are basically formulated by the national technical committee on compressors of standardization administration of China.Chemical, coal, shipping, military and other industries also have a small number of compressor standards.Enterprise standards shall be formulated by the compressor manufacturer and enforced within the enterprise.This paper mainly introduces the various compressor standards formulated by the national technical committee on compressor of standardization administration of China.
(2) principles for the composition of the standard compressor system
1. There are many types of compressors, involving a wide range of standard planes.Different standard systems can be constructed according to different types of compressors.International standard ISO5390 "compressor classification" and equivalent to the international standard GB4976 are adopted by the classification of structure.This classification is more scientific and rigorous, not easy to overlap.Therefore, the standard system of compressor in China is determined according to the classification of structure.
2. According to the structure, compressors are divided into two categories: positive displacement compressors and dynamic compressors.In theory, volumetric compressors include compressors with various compression media, while traditionally, refrigeration compressors are classified as refrigeration equipment.Dynamic compressor has turbine compressor, ejector and so on, China's industrial habits also put it into the fan industry.Therefore, the standard set by the compressor standard system mainly involves the category of positive displacement compressor, including its parts, auxiliary equipment and post-processing equipment, but does not include the refrigeration compressor.This is another principle that determines the standard system.
(3) the hierarchical structure of the compressor standard system
Compressor standard system is divided into three layers.
The first layer is the foundation and method standards.These standards are comprehensive and are generally applicable to all types of positive displacement compressors.
The second layer is security and product standards.These standards are basically determined according to the classification of compressor structure, and specify the performance parameters and manufacturing inspection requirements of various types of compressors as well as the safety requirements that must be met.