Application scope and daily maintenance method of hydraulic bolt tensioner

　　The hydraulic bolt tensioner is referred to as the hydraulic tensioner. The function of its power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. It refers to the oil pump in the hydraulic system, which provides power to the entire hydraulic system. So, what is the scope of application of hydraulic bolt tensioners? What are the advantages of hydraulic bolt tensioners? What are the daily maintenance methods for hydraulic bolt tensioners? These problems are of concern to many users, and Zhonghong Precision will analyze them with you below.

　　Scope of application of hydraulic bolt tensioner:

　　The hydraulic bolt tensioner has a wide range of applications, mainly in the fields of electric power, shipbuilding industry, metallurgical coal mine, petrochemical industry, heavy machinery and so on.

　　Advantages of hydraulic bolt tensioner:

　　1. Mineral oil is generally used as the working medium, the relative moving surface can be self-lubricated, and the service life is long.

　　2. Light weight, small size, small motion inertia and fast reaction speed.

　　3. Various components of hydraulic transmission can be arranged conveniently and flexibly according to needs.

　　4. Overload protection can be realized automatically.

　　5. The operation and control are convenient, and multiple bolts can be tightened at the same time. Save labor costs.

　　6. It is easy to realize linear motion.

　　7. It is easy to realize the automation of the machine. When the electro-hydraulic joint control is adopted, not only a higher degree of automatic control process can be realized, but also remote control can be realized.

　　8. It can be used as a device for applying axial force for hydraulic interference connection for top pressure installation.

　　Daily maintenance method of hydraulic bolt tensioner:

　　1. It must be operated in strict accordance with the method and program required by the manual, and the input working pressure and bolt stretching length of the hydraulic tensioner cannot be arbitrarily increased, so as to avoid damage to the sealing ring and related matching parts.

　　2. After finishing the work, it should be wiped clean and properly kept, especially the oil inlet interface should not seep into the dust (after the construction is completed, the quick joint part should be covered with a dust cap) to prevent damage to the oil cylinder and piston after entering the oil cylinder.

　　3. When replacing the O-ring and other accessories, pay attention to the fit to ensure the sealing effect.

　　4. The working fluid is L-HM32 or L-HM46 hydraulic oil. It is strictly forbidden to use alcohol, water, glycerin, brake oil, ordinary engine oil, etc. as working fluid.

　　5. All parts of the stretcher should always be kept clean, and there should be no dust or dirt around the oil pump, oil cylinder and rubber hose.

　　6. The working fluid should be replaced once a year, and it must be filtered and cleaned with a 120-200 mesh filter.

　　7. The high-pressure hose should be kept properly, and should not be corroded by corrosive gases and liquids. Due to long-term use and storage, the hose is easy to age, and should be checked regularly and replaced. The hose shall be pressure tested once a year.

　　8. When replacing the cylinder seal, the seal must be installed in the sealing groove, otherwise the pressure cannot be built up.

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