Steps / methods:
1, the first possibility of mechanical seal leakage at the machine seal, static plane wear. The mechanical seal caused by static and static plane wear for six reasons:
　　
2, the installation is too tight. Observe the static and dynamic ring plane of the mechanical seal. If there is serious burning phenomenon, the surface is black and deep, the seal rubber hardens and loses its elasticity. This phenomenon is caused by the tight installation. Approach: Adjust the installation height, the impeller is installed, pull the spring with a screwdriver, the spring has a strong tension, release immediately reset, there are 2-4MM mobile distance.
　　
3, the installation is too loose. Observer seal, static ring plane, the surface has a thin layer of scale, to wipe the surface of the basic wear and tear, which is caused by the loss of spring flexibility and poor assembly, or motor caused by the axial movement.
　　
4, poor water quality with particles. Due to poor water quality, containing small particles and medium hydrochloride content is high, the formation of abrasive wear seal plane or surface of the resulting groove, ring groove and so on. Approach: improve water pressure or medium, replace the machine seal.
　　
5, dry running damage caused by running water. This phenomenon is more common in the end of the valve installation form the entrance of negative pressure, air inlet pipe, the pump cavity with air, pump boot, machine seal friction high speed operation produces high temperature, can not be cooled, check machine seal, spring tension normal , The friction surface burns black, the rubber hardens and cracks. Approach: drain pipes and pump cavity air, replace the mechanical seal.
　　
6, cavitation. Cavitation is mainly caused by hot water pump. As the medium is hot water, the water temperature is too high to produce steam, the gas inside the pipe into the pump chamber height, this part of the gas can not be excluded, resulting in water running, machine seal dry failure, cavitation automatic loading Valve, replace the machine seal.
Cobalt-based alloy powders are commonly used in laser cladding processes due to their excellent wear resistance, high temperature strength, and corrosion resistance. These alloys typically contain varying amounts of cobalt, chromium, tungsten, and nickel, among other elements, to achieve specific properties.
The laser cladding process involves melting the cobalt-based alloy powder using a high-energy laser beam and depositing it onto a substrate to form a protective coating. This coating helps to enhance the surface properties of the substrate, such as hardness, wear resistance, and corrosion resistance.
Some common cobalt-based alloy powders used in laser cladding include:
1. Stellite: This is a well-known cobalt-chromium-tungsten alloy that offers excellent wear and corrosion resistance. It is often used in applications where high temperatures and abrasive environments are present, such as in oil and gas drilling tools, valves, and pump components.
2. Tribaloy: Tribaloy alloys are cobalt-based alloys that contain varying amounts of chromium, molybdenum, and silicon. They are known for their exceptional high-temperature strength and resistance to galling, making them suitable for applications in the aerospace, petrochemical, and power generation industries.
3. Haynes alloys: Haynes alloys are nickel-cobalt-chromium-molybdenum alloys that offer excellent high-temperature strength, oxidation resistance, and corrosion resistance. They are commonly used in applications where extreme heat and corrosive environments are present, such as in gas turbines and chemical processing equipment.
These cobalt-based alloy powders are available in various particle sizes and can be tailored to meet specific application requirements. They can be used with different laser cladding techniques, such as powder-fed laser cladding or blown powder laser cladding, depending on the desired coating thickness and properties.
Overall, cobalt-based alloy powders for laser cladding provide enhanced surface properties and improved performa
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