Control method and control system for simultaneous heating of at least two rings
A control method and technology of ring parts, applied in the field of heat treatment, can solve the problem that the heating control is in a blank state, etc.
Active Publication Date: 2020-01-31
XINJIANG GOLDWIND SCI & TECH CO LTD
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Problems solved by technology
[0004] At present, the heating control of only one annular piece can be realized inside the heating furnace, and the heating control of two or more annular pieces in the prior art is still in a blank state
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Embodiment Construction
[0112] Aiming at the control method of simultaneous heating of two or more annular parts, a lot of experiments and theoretical researches have been carried out in this paper. In addition to the problem of road design, the most important thing is to solve the technical problem of heat loss due to hoisting of each ring part, especially the heat loss of the last ring part is the most. When the temperature of each ring part rises to the same temperature, the expansion of the last ring part minimum.
[0113] If the hoisting heat loss is considered when each ring is heated, and each ring is heated according to the temperature of the last ring, the expansion of other rings will be too large, resulting in heat loss. If the final heating temperature of the heating furnace is set according to the expansion of other ring parts, the last ring part may be difficult to assemble due to the long time of opening the heating furnace and insufficient expansion of heat loss.
[0114] On the basi...
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The present invention discloses a method and system for controlling of heating at least two ring parts at the same time. The method concretely comprises: detecting the temperature of the outer wall surface of each ring part being in contact with a heating medium and the temperature of the inner wall surface of each ring part being in contact with the heating medium in a heating process; controlling the temperature of the outer wall surface of each ring part to be higher than the temperature of the corresponding inner wall surface thereof according to a pre-stored control strategy, wherein a difference between the temperature of the outer wall surface and the temperature of the inner wall surface is located in a predetermined difference range; and controlling the temperature of the outer wall surface of ring parts coming secondarily from a furnace to be always higher than the temperature of the outer wall surface of the ring parts coming first from the furnace in the heating process according to the sequence of the releasing time from the furnace. According to the sequence of the releasing time from the furnace, each ring part is subjected to non-equal heat transferring, in the same heating time, a bearing coming secondarily from the furnace is higher than a bearing coming first from the furnace in the temperature rising, and the corresponding swell capacity of the bearing coming secondarily from the furnace is bigger than that of the bearing coming first from the furnace so as to make up the heat loss in the process from opening of the heating furnace to hanging the bearing and satisfy the bearing assembling demand.
Description
technical field [0001] The invention relates to the technical field of heat treatment, in particular to a control method and control system for simultaneous heating of at least two or more annular parts. Background technique [0002] At present, ring parts such as large-scale bearings of wind power generators are generally assembled on components such as motor shafts through a shrink-fit installation method. The so-called thermal sleeve installation method refers to putting the bearing in hot liquid or hot gas for heating before installation, using the principle of thermal expansion and contraction to make the inner diameter of the bearing expand and increase, and the expanded bearing is installed on the motor shaft, and the temperature is lowered. The rear bearing is then fixed on the motor shaft. Wherein, the bearing is generally heated in a heating furnace, and air is usually used as a heat medium in the heating furnace. The specific structure of a heating furnace device...
Claims
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IPC IPC(8): G05D23/19G05D23/32
CPCG05D23/1934G05D23/1935G05D23/32
Inventor 马盛骏马万顺何永科
Owner XINJIANG GOLDWIND SCI & TECH CO LTD