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Core pulling and threading method for overhauling of large motor

A large-scale motor and core-through technology, which is applied in the manufacture of motor generators, electrical components, electromechanical devices, etc., can solve problems affecting the service life of motors, insulation damage, etc., and achieve the goal of reducing maintenance costs, reducing damage, and shortening maintenance cycles. Effect

Active Publication Date: 2012-01-04
CHINA MCC17 GRP
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AI Technical Summary

Problems solved by technology

[0002] In metallurgy, electric power and other industries, it often happens that large-scale generators or motors need to be repaired at the factory due to failures. Long-distance transportation of motors without core-pulling is likely to cause insulation damage and affect the service life of the motor. Generally, the solution of core-pulling and then transportation is adopted.

Method used

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  • Core pulling and threading method for overhauling of large motor
  • Core pulling and threading method for overhauling of large motor
  • Core pulling and threading method for overhauling of large motor

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Embodiment Construction

[0032] The method of pulling through the core of the large motor method proposed by the present invention will be further described with reference to the accompanying drawings.

[0033] Lay the steel plate next to the motor. The round steel is placed on the steel plate to form a slide. Place the on-site mast on the top of the round steel, hang the pulley block, use the hoist to pull the mast to remove the bearing seat, etc., and fasten the lower end of the traction wire rope to Lay a steel paper pad between the stator and the rotor on the stator lifting ears of the core-pulling motor. After lifting the stator and the rotor by 200mm~300mm, gently return the jack to lower the stator onto the four stator supports, and use the winch to pull the mast Move and cooperate with the electric hydraulic jack and other devices to pull the core and slowly move to the position to be lifted. After returning to the factory for inspection and repair, the core will be restored. The specific process...

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Abstract

The invention provides a core pulling and threading method for overhauling of a large motor, belonging to the technical field of the overhauling of the large motors. The method provided by the invention mainly comprises: preparing for core pulling: gantry processing and manufacturing, slideway laying and hoist placing; removing auxiliary devices, such as a bearing seat; pulling a core; overhauling for exfactory; and threading the core for recovery. According to the invention, the tonnage restriction on the core pulling and threading when a manual hoist is used for listing to cooperate with the moving of the gantry in the prior art is overcome effectively, the operation situation with small space is eliminated effectively, the core pulling and threading cost is lowered, the overhauling cycle is shortened greatly, and an effective solution is provided for the core pulling and threading of the large motor in a small plant. The method provided by the invention has the characteristics of capability of lead operation, safety and reliability and high economic benefit.

Description

Technical field [0001] The invention belongs to the technical field of large-scale motor maintenance, and in particular relates to a core pulling method for large-scale motor maintenance. Background technique [0002] In metallurgy, electric power and other industries, there are often cases where large generators or motors need to be repaired. Long-distance transportation of the motor without core-pulling will easily cause insulation damage and affect the service life of the motor. Generally, the solution of core-pulling and then transportation is generally adopted. Large-scale motors sometimes weigh up to 100t. How to ensure that the generators are cored out on time, quality, and safely when they are not used in the plant, the effective height of the plant is low, and there is no hoisting point above the motor. Re-threading the core is a major technical problem in motor maintenance. Summary of the invention [0003] The purpose of the present invention is to provide a method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/00
Inventor 孙亮陈忠宝杨明汪命钊潘邦全
Owner CHINA MCC17 GRP
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