Sealing technology is widely used in machinery and equipment in modern industrial and mining enterprises. Due to various reasons, many devices often fail to meet sealing requirements and cause leakage. Leakage not only causes poor lubrication of the equipment, affects the performance and normal operation of the equipment, but also pollutes and deteriorates the working environment and working conditions of the use department, and affects the civilized production and economic benefits of the enterprise. (1) Oil leakage analysis 1 The design is irrational. Including the product designer did not consider the seal when designing, or not familiar with the sealing technology; the design of the seal structure is irrational, and it does not adapt to the working conditions, operating conditions, temperature medium and other characteristics, do not pay attention to equipment, corrosion, vibration, are Pressure and dredging measures; factors such as aeration, oil return, drainage and disassembly are not considered. 2 poor manufacturing and machining accuracy. Including in the manufacturing process, the plane processing is not straight, the fit is not good, the concentricity is poor, the surface roughness is too high, the defects such as the air hole and the sand hole are caused during the casting, and other manufacturing and processing quality factors will cause the leakage. 3 improper choice of sealing material. Sealing materials generally have basic properties such as compactness, elasticity, compressibility, flexibility, abrasion resistance, ozone resistance, radiation resistance, abrasion resistance, resistance to media erosion, resistance to high and low temperatures, and mechanical processability. Of course, none of the materials have these properties at the same time. Therefore, depending on the working conditions, materials with the main properties can be selected to suit the sealing conditions. However, due to the unreasonable selection of materials, the leakage can be caused by the conditions of the sealed working conditions. 4 Poor management and poor maintenance. This is the direct cause of equipment leakage, such as the sealing element has reached the service life, but it has not been replaced in time, the fasteners are loosened, and the glands are not pressed and adjusted in time. 5 The installation method is incorrect. Many reasons for leakage are caused by improper installation location, excessive eccentricity, side cracking of seals, varying preloads of fastening screws, and incorrect assembly processes. 6 working conditions are poor. Including the sealed medium is corrosive, violent vibration, high temperature temperature, dust and external media erosion. The above are the main reasons for the leakage. And all factors are intertwined and interact with each other. Therefore, it is necessary to analyze each one by one, find out the main cause of the leakage, and take effective measures for leakage. (2) Prevention and control of equipment oil leakage There are many reasons for equipment oil leakage, which involves designing, manufacturing, operation, and maintenance. Therefore, leakage prevention and control of equipment is a systematic project. First of all, we should find a solution to the problem from the design, and then follow the principles of sealing, blocking, grooming, and pressure equalization to implement targeted management. However, the design and manufacturing quality of the lifting equipment is the key to solving the equipment oil leakage. Change: For unreasonable sealing structures, use sealing materials that are not easily leaked or improve the pressure difference of the system, redesign the sealing structure, change the liquid lubrication material into solid or semi-fluid lubrication, etc. to achieve no leakage requirements. Change: Replace damaged or poorly functioning seals and fittings. Introduction: With the aid of external force, some of the leaked media is drawn out, recycled or directly introduced into the tank. Blocking: In view of the defects in design, manufacture, and other quality, the shell wall has blisters, pores, and holes, which are generally repaired or repaired by plugging. Repair: repair leak parts, welding, sticky holes, cracks, scraping, grinding repair seals, improve the accuracy of the sealing surface. Management: Strengthen management and inspection, timely discovery, and governance at any time. To ensure that the equipment is leak-free, professional maintenance and repair personnel should strengthen the inspection tour and discover leakage points of the equipment. In-depth investigations should be conducted, and careful observation should be conducted. Careful study and analysis should be conducted to identify the cause. Any measures that can be promptly resolved will be immediately taken out of the measures. If they cannot be ruled out for a while and the workload is large, they can be filled in the failure inspection record table and the maintenance plan can be arranged. The engineers and technicians responsible for the maintenance of the equipment are very aware of the leakage of the equipment within the scope of the supervisor and their causes, and they are classified and classified. They are common problems and they must study and solve measures. For difficult and key problems that directly affect the normal use of equipment and production, we must concentrate on conquering. Equipment that is regularly inspected, repaired, and overhauled should generally be leak-free and meet no-leakage requirements.
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