Hydraulic key puller and key pulling method using same

Abstract

The invention provides a hydraulic key puller. The hydraulic key puller is composed of a hydraulic puller, a clamping block seat, wedge-shaped clamping blocks and a base. The hydraulic puller serving as a core power part of the hydraulic key puller is a double-acting hollow hydraulic cylinder and is mainly composed of a piston rod, an outer cylinder body, a hollow cylinder barrel, a cylinder cover, a hanging ring and a number of sealing pieces and guiding pieces. A first oil nozzle and a second oil nozzle are arranged on the outer cylinder body, and a key outlet and threaded holes for fixing adjusting bolts are formed in the cylinder cover. The hydraulic key puller is compact in structure, large in pulling force, easy to operate, convenient and reliable to use and high in adaptability, and hydraulic key pullers with various dimensions, various strokes, various pulling forces and various clamping block forms can be customized according to the dimensions, shapes and other actual conditions of target keys. By the adoption of the hydraulic key puller and a key pulling method, the working efficiency can be improved, potential safety hazards can be eliminated, and good economic benefits are brought to users.

Description

technical field [0001] The invention relates to the fields of electric power, machinery, engineering, construction, transportation, etc., and in particular to magnetic keys and magnetic pole keys of generator sets in the electric power industry, and to pull out keys, pins, rods, columns, shafts, and piles in industries such as machinery, traffic, engineering, and construction. etc., more specifically relate to a hydraulic key puller and a key pull method thereof. Background technique [0002] Some large-scale machinery, equipment, or some construction projects often encounter the need to disassemble keys, pins, rods, columns, shafts, piles and other components. Since there is no special and effective tooling, some destructive methods can only be used to do some damage. Demolition is very dangerous, labor-intensive and time-consuming, and it is difficult to achieve the desired effect and ensure safety. [0003] The magnetic pole key, an important part of the rotor of a large...

AI Technical Summary

Problems solved by technology

[0002] Some large-scale machinery, equipment, or some construction projects often encounter the need to disassemble keys, pins, rods, columns, shafts, piles and other components. Since there is no special and effective tooling, some destructive methods can only be used to do some damage. Demolition is very dangerous, labor-intensive and time-consuming, and it is difficult to achieve the desired effect and ensure safety

[0003] The magnetic pole key, an important part of the rotor of a large hydro-generator set, is a wedge plate structure. The main key and the auxiliary key are used together. Cut off, the length of the remaining exposed part is very short. During the maintenance of the unit, it is very difficult to disassemble due to the large wedging force of the key, the difficulty of clamping the head, the limited site environment, and the inability to use heavy equipment.

[0004] The method of removing the magnetic pole key during the overhaul of a large hydroelectric generator is usually to use some simple clamping tools to clamp the key head, and use the main hook of the bridge crane to forcibly pull it out. The operation is extremely inconvenient and the work efficiency is low. The pulling force is difficult to control, the pulling center is not easy to control, and the fixture is not reliable. There are many potential safety hazards. Heads will fly around uncontrollably, which can easily cause serious safety accidents, damage equipment, and endanger life

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