Importance and methods of seal detection of mechanical components and devices-Shenzhen Hirays Automation Technology Co., Ltd

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Importance and methods of seal detection of mechanical components and devices

2022.08.17

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Introduction to mechanical seals and seal detection methods
Sealing is also directly related to material and energy savings.Various power machinery and fluid machinery account for the largest proportion of all energy consumption.Due to the existence of internal and external leakage in these machines, the volumetric efficiency is often very low, and the loss can reach more than 10% of the total power, and even 40~50% in small machines.The friction power consumption of some sealing devices itself is also not small.For example, the friction loss of piston rings accounts for 2/3 of the friction loss of the entire engine.The centrifugal impeller seal may consume up to 1/3 of the total shaft power.As for improving sealing, eliminate running, popping, dripping and leaking, and reduce material loss.It is a direct benefit.For example, when the oil pumps used in refineries use packing seals, the annual oil leakage of each pump is about 10m3. Nowadays, the use of mechanical seals is promoted, and the annual oil leakage is reduced to less than 0.1m3. Based on 1,000 pumps, the annual oil saving is nearly 1,000m3. If all types of fluid machinery adopt appropriate or advanced sealing technology, the benefits in terms of material and energy conservation will be very considerable.Therefore, sealing testing is very necessary, which can enhance the competitiveness of products.thereby achieving better success.
With the development of science, technology and production, the application scope of fluid machinery and fluid engineering continues to expand. High-temperature sealing, low-temperature sealing, ultra-low temperature, strong corrosion, flammable, explosive, toxic, radioactive media, high-pressure sealing, high-vacuum sealing, and sealing of suspended particle media containing various impurities have also emerged.Ensuring the reliability and service life of seals is one of the most important issues in current seal research, design, manufacturing, and use.Hirays' sealing testing equipment can well detect the sealing performance of fluid mechanical devices, whether individually or as a whole, it can detect the sealing performance and leakage amount.
The function of sealing is to prevent leakage, or to be waterproof.The parts that play a sealing role are called seals, or seals for short.More complex seals, especially those with ancillary systems, are called sealing devices.For example, automobile cylinder sealing devices, car camera and other seals, and fuel tanks and other sealing parts all need to be 100% waterproof and sealed.Otherwise, it is likely that it will not be used or its service life will not be long, which requires a sealing detection equipment to detect the sealing of the cylinder.The sealing of the fuel tank is used to prevent the leakage of oil in the fuel tank. A waterproof testing equipment is used to detect the waterproof performance of the vehicle camera to increase the service life of the vehicle camera.
Mechanical or equipment fluid sealing includes two scenarios: hydrostatic sealing and hydrodynamic sealing.The seal between relatively stationary joint surfaces (ie, sealing surfaces) is called a static seal; the seal between relatively moving joint surfaces is called a dynamic seal.For fluid machinery and fluid engineering, sealing is an indispensable component. Among many machines and equipment, although sealing generally only accounts for a small proportion of the entire machine, it often directly determines the safety, reliability and durability of the entire machine or even the entire set of equipment.It has thus become an important indicator for evaluating the quality of many mechanical products.Especially in the petrochemical and other industries, many of the fluids transported, processed and stored are flammable, explosive, corrosive and toxic media. Once the seal fails or even fails, the consequences are serious. At the least, it affects product quality, pollutes the environment, and endangers the health of surrounding people. In severe cases, it can lead to fires, explosions, casualties and even large-scale and long-term ecological environment deterioration. The extremely serious accident caused by the leakage of nuclear fuel at the Chernoli Nuclear Power Plant in the former Soviet Union is a profound example.Therefore, fuel tank leak detection and component seal detection are indispensable and very necessary.The leak detector and seal detection equipment of Shenzhen Hiraysi is a good choice.
In the operation and use of fluid machinery, seal maintenance and repair work account for a considerable proportion. For the petrochemical industry, seal failure is the main cause of unplanned shutdowns. According to statistics, more than 60% of unplanned shutdown events are related to seal failures.Taking the pump as an example, the maintenance workload of fluid dynamic seals accounts for almost 50% of the total maintenance volume.More than half of rocket engine failures are also caused by sealing failure or failure.In this sense, it can be said that sealing is one of the weakest links in machines and equipment.Therefore, advanced and reliable sealing technology is also an important link that must be ensured for automated continuous production and civilized production.Therefore, how to ensure sealing can be said to be an important indicator of modern products.
The traditional seal detection method uses the water immersion method, which cannot be used for many precision seal seal detection, leakage detection, and precision IP level detection.This requires the use of compressed air air tightness testing equipment.Shenzhen Hiraysi Automation Technology has been committed to the research and development of leak detection equipment, sealing test equipment, and waterproof detection equipment for many years, and has introduced it to the market, and has received continuous praise.

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