Airtightness testing is widely used in medical device products, automotive parts production, precision hardware manufacturing, bathroom hardware parts production, household appliance component production, and valve and pipeline production and processing. Airtightness testing is an important process to ensure the airtightness and quality of products.
Before the airtightness tester came out, the industrial production process of the product mainly used air compression and observation methods to test the airtightness of the product. This method first seals the workpiece that needs to be tested, then fills the seal with compressed air and immerses it in water, and then draws a conclusion by visually observing whether bubbles are generated.
The traditional airtightness testing method has significant limitations in practical production applications. Firstly, the testing efficiency is very low. Secondly, prolonged visual observation can lead to fatigue. Thirdly, for products with complex structures or small workpiece volumes, the bubbles generated during the testing process are very small and easily adhere to the inner wall of the product, which cannot ensure the complete validity of the testing results. With the development of industrial production technology, the research and development of airtightness testing equipment and detection systems are constantly improving. Testing equipment that uses pressure sensors to detect and determine the airtightness of workpieces is gradually being introduced to the market and widely used.
The commonly used automated airtightness detection methods now mainly include acoustic emission detection method and differential pressure detection method. Among them, differential pressure airtightness detection is a commonly used detection method, which can be divided into positive pressure detection method and negative pressure detection method. The working principle of differential pressure airtightness detection is based on the ideal gas state, and calculates the gas leakage rate by detecting the pressure changes inside the container. Due to a certain amount of gas leakage in a container of a certain volume, there will be a pressure drop process inside the container relative to before. The differential pressure method calculates the actual leakage rate of gas inside the container by measuring the pressure drop value inside the container for a certain period of time. However, due to the fact that the differential pressure detection method cannot directly detect the gas leakage rate inside the container during the detection process, but indirectly measures the gas leakage rate inside the container through other parameters, there is still a certain error rate in actual use. To use the differential pressure airtightness detection method in fields with high requirements for leakage rate measurement, it is necessary to first correctly analyze and synthesize the impact of various error factors on the measurement results in order to accurately calculate the leakage value of the workpiece.
Suzhou Loho Electronic Technology Co., Ltd. specializes in airtightness detectors, airtightness detectors, leak detectors, airtightness leak detectors, airtightness testers and other equipment. They are widely used, have fast detection speed, and are suitable for sealing, waterproofing, airtightness, leakage and other fields. Welcome to inquire by phone: 189-1262-8676
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