In modern industrial production, product quality and safety are the lifeline of enterprise development.Airtightness, as one of the important indicators of product quality, is directly related to product performance, life and safety in use.
Imagine, if the power battery of a new energy vehicle has poor sealing, it may lead to electrolyte leakage and cause safety accidents; if the sealing components of a medical device are defective, it may lead to drug contamination or failure and jeopardize the health of the patient; if the sealing of an aerospace equipment is insufficient, it may malfunction in extreme environments and cause serious losses. Therefore, airtightness testing is not only an important part of product quality control, but also an important barrier to safeguard personal safety and social stability.
I. Principle of airtightness testing
Gas tightness testing, also known as sealing test or leakage test, is the ability of the product under test to stop gas or liquid leakage through specific methods. Its core purpose is to ensure that the product in a variety of use environment can maintain the stability of its internal environment, to prevent the leakage of media, so as to protect the performance, safety and reliability of the product.
The basic principle of airtightness testing is to place the inspected product in a specific environment, theBy applying a certain pressure (positive or negative), detecting changes in gas pressure, changes in flow rate or the amount of leaking medium inside or outside of itThis is the way to determine whether the sealing performance meets the standard.
II. Airtightness Testing: Methods and Industry Applications
Depending on the test object and application scenario, airtightness testing uses a variety of methods to meet the specific needs of different industries:
1. Positive pressure method
A gas of a certain pressure is filled into the product and the pressure change or leakage is detected.
It is widely used for sealing detection of outdoor products (e.g. LED lights, outdoor Bluetooth audio), home appliances (e.g. water purifier cartridge), and automotive parts. For example, leakage detection of automobile fuel tanks can effectively prevent fuel volatilization and leakage, reducing environmental pollution and fire risk.
2. Negative pressure method
Vacuum the inside of the product to form a negative pressure environment and detect the internal pressure change or leakage.
It is commonly used to test products that need to withstand external pressure, such as medical devices and vacuum packaging. For example, sealing performance testing of medical vials can ensure that the drugs are of good quality.
3. Volumetric quantification
Determine the amount of leakage by measuring the mass volume of the leaking gas.
Suitable for detecting fully enclosed and sealed products, such as cell phones, smart watches, GPS locators, electric toothbrushes and so on.
4. Gas flow method
Leakage is determined by measuring the change in flow rate of the leaking gas.Ideal for detecting products with very small leaks, such as tiny tubes in medical devices and capillary tubes in the refrigeration industry.
appliance: The method is suitable for gas-tight holding pressure testing and can quickly and accurately quantify the leakage rate, which is one of the commonly used inspection tools in industry today.
5. Differential pressure method
Determination of leakage by comparing the pressure difference between the product under test and a standardized partThe high detection accuracy of the product makes it ideal for use in high-precision inspection scenarios, such as in the aerospace industry.
III. Jingcheng EngineeringAirtightness Tester: Performance you can count on
Precision Engineering knows the importance of airtightness testing, with years of technical accumulation and experience precipitation, launched a series of high-performanceAirtightness TesterIt has won the trust of our customers with its excellent performance and stability.
- highly accurate: Adoption of high-precision sensors and advanced control algorithms ensures the accuracy and reliability of the detection results and avoids losses caused by misjudgment.
- high stability: Strong anti-interference ability and environmental adaptability, able to operate stably in a variety of complex industrial environments, to ensure the continuity and reliability of the detection process.
- high sensitivity: The ability to detect small leaks, identify potential quality problems in time, and prevent further damage before it occurs.
- Smart Switching: Supports a variety of testing modes and parameter settings, which can be flexibly switched according to different testing needs, improving testing efficiency and reducing labor costs.
- Customized services: Jingcheng Engineering provides professional customized services to design and manufacture exclusive testing equipment according to the specific needs of customers to meet the special requirements of different industries.
IV. Setting of water depth and airtightness test air pressure
For products that need to be used underwater, the calculation of the water depth pressure is an important basis for setting the air pressure for air tightness testing.
1. Calculation of water depth pressure
For every 10 meters of water depth, the pressure increases by approximately 1 atmosphere (100 kPa). Therefore, the pressure that the product needs to withstand can be calculated based on the depth of the water in which it will be used.
The formula is: P = ρgh
where P is the pressure, ρ is the density of the liquid, g is the acceleration due to gravity, and h is the depth of the water.
2. Air pressure setting
During the airtightness test, the appropriate test air pressure should be set according to the calculated water depth pressure and combined with the actual use of the product and relevant standards.Normally, the test air pressure should be slightly higher than the water depth pressure to ensure the safety and reliability of the product.
V. Water depth pressure and air pressure setting tools
In order to help users to better perform airtightness testing, Precision Engineering has developed the Water Depth and Pressure Calculator. This free tool can help users:Quickly calculate the pressure value corresponding to the water depth, saving calculation time and improving work efficiency.
simplyFollow "Jingcheng Engineering Airtightness" Public Numbercan immediately (do sth)Free access to calculation toolsThis will not only help you to improve your work efficiency, but also to gain more expertise and technical support. This will not only help you to improve your work efficiency, but also gain more expertise and technical support related to airtightness testing.
Summarize
Airtightness testing is an important line of defense to ensure product quality and safety.Precision EngineeringWith professional technology, excellent products and perfect service, we are committed to be your reliable partner.We are convinced that through scientific airtightness testing and reasonable parameter setting, we can significantly improve the efficiency and accuracy of product quality control, and win a greater competitive advantage for enterprises in the market.
optionPrecision EngineeringThe most important thing is to choose a peace of mind and security, so let's work together to build a great wall of quality and safety!
