Vertical rotary heating furnace of main shaft steel ingot for wind driven generator

Abstract

The invention discloses a vertical rotary heating furnace of a main shaft steel ingot for a wind driven generator. The heating furnace comprises a left furnace wall, a right furnace wall, a rear furnace wall, a top furnace wall, a furnace bottom and a furnace door, wherein an insulating layer is arranged on the inner layer of the furnace wall; a refractory brick layer is arranged at the furnace bottom; and gas burner nozzles are arranged on the lower parts of the left furnace wall and the right furnace wall. The furnace is characterized in that: a circular rotary disc made of refractory materials is arranged in the middle of the furnace bottom; the internal length of the left and right furnace walls is 350 cm, and the internal height is 450 cm; and the internal height of the rear furnace wall is 450 cm, and the internal width is 350 cm. When the furnace is used, the large head of the main shaft steel ingot of the wind driven generator is arranged downwards and the main shaft steel ingot is erected on the circular rotary disc. In the vertical rotary heating furnace of the main shaft steel ingot for the wind driven generator, the main shaft steel ingot of the wind driven generator is heated while vertically rotating, so that the surface of the main shaft steel ingot is heated uniformly; therefore, temperature preservation time can be shortened, the increase of the temperature rising speed and the improvement of the labor efficiency can be facilitated, energy consumption is reduced, production cost is reduced, and steel is saved.

Description

technical field [0001] The invention relates to an improvement of a heating furnace for a large steel ingot, in particular to a vertical rotation heating of a wind power generator main shaft steel ingot which can make a large steel ingot heat and rotate vertically in the heating furnace, thereby improving the uniformity of heating furnace. Background technique [0002] In the production of the wind turbine main shaft, the raw materials used are large steel ingots in the shape of a truncated cone or a truncated pyramid, with a diameter of 85-123.1 cm at the bottom, a diameter of 107-129.8 cm at the top, and a length of 201-201.8 cm. 13-27 tons. Before forging, it needs to be heated by a large heating furnace to reach the required forging temperature. This large heating furnace includes the left furnace wall, right furnace wall, rear furnace wall, top furnace wall, furnace bottom and furnace door. The inner layer is equipped with insulation layer, the bottom of the furnace i...

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Problems solved by technology

Apparently, the disadvantages of heating the wind turbine main shaft steel ingot with this large-scale heating furnace are: 1. Since the wind turbine main shaft steel ingot is motionless, and the direction of the gas burner is fixed, so, 2. In order to overcome the shortcoming of uneven heating, the method currently adopted is: in different temperature periods, increase the holding time, such as when the wind turbine spindle steel ingot at room temperature is packed When entering the heating furnace at 620°C-650°C, it needs to be kept warm for 8-12 hours, and then heated at a rate of 50-70°C per hour to 830-860°C, kept for 10-18 hours, and then heated to Only when the forging temperature is 1200-1240 ℃ can it be out of the furnace, so that the holding time is increased and the labor efficiency is reduced; 3. Due to the use of two steel pads, these two steel pads are basically oxidized during the heating process, so that The steel ingot of the main shaft of the wind turbine in the hot state is close to the bottom of the furnace, which not only affects the uniformity of heating in the later stage, but also causes waste of steel

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