Hydraulic machine seal failure signs and preventive measures
Dec 05, 2022
Signs of hydraulic machine seal failure
1. hydraulic machine system by the experimental qualified into use, and then leakage, generally in the leakage before the obvious appearance will have signs to show. Of course, in reality, there are signs and suddenly appear leakage, that can not be prevented and pre-treatment. Where there are signs of leaks, they need to be observed and detected, and if found, the leak can be dealt with in advance. The sweating phenomenon. It is often found at a joint, or a rupture somewhere. Although the joint was Zheng Song, crack out although there are cracks, but not yet completely cracked through, so at this time the hydraulic machine body does not leak.
Hydraulic machine seal failure causes of analysis and preventive measures
1. to prevent the harm of the seal, it is necessary to seal the design, selection, processing and manufacturing, assembly, storage, use, careful observation of the signs of seal failure, maintenance and other aspects of excellence, should not have any negligence, as far as possible to reduce the seal failure to the last degree, so that the seal failure hazard as little as possible or do not occur.
2. The primary means of preventing seal failure of hydraulic machine system is to keep the seal design of this pass, especially to consider all aspects of mutual influence.
The design of hydraulic machine seals should be in line with the working conditions of the seal
1. so-called working conditions, working pressure it refers to the load machine enough to determine the required rated pressure, it is the pressure in the hydraulic machine system, first of all, to consider the technical parameters. Such as belonging to the low pressure system, the general choice of extrusion-shaped seals, so that relatively large friction, but it is a reliable seal. He has something two-way seal, and does not add a retaining ring, so simple and economic. If you learn to use the lip seal. Because of the low pressure, it is difficult to affix a tight cover, is not sealed tightly, produce leakage. If you choose a harder material seal, the recovery of elastic deformation is slower. Produces large changes when installed in the groove, as low pressure is not sufficient to eliminate deformation.
The workplace of the hydraulic machine
1. The work site is too dusty, such as some in the mine under the stubborn hydraulic machine, hydraulic machine bit listed, it is carrying out coal mining. Despite the sprinklers, when the coal mining is started, there is a lot of dust. For this kind of weighing more Yang Institute for sealing design, must consider dust and friction.
2. Hydraulic presses working on the sea, such as hydraulic presses and hydraulic presses working in spaces with a lot of humidity and water vapour.
3. Hydraulic machinery working in the cold zone or in colder places outdoors must pay attention to the effects of low temperatures and should choose seals or sealing devices made of bottom temperature resistant materials.
4. Hydraulic machines working in the tropics or often outdoors under strong sunlight.
5. In the workplace should pay attention to chemical materials or drugs, especially gases with a strong smell, to prevent them from chemical reactions to seals or sealing devices.
Attention to the quality of installation of hydraulic presses
1. The seals and their off parts used in the installation must be tested and qualified, using high quality products whenever possible.
2. Cleanliness must be ensured, no dust or foreign matter is allowed to be present to ensure cleanliness.
3. Must be civilised installation, no brutal chaotic bridge hitting, hard will seal into.
4. Must be careful has been installed in order to prevent the seal will be scratched, touch damage.
Translated with www.DeepL.com/Translator (free version)
