Method and device for hot assembling large-diameter bearing

Abstract

The invention discloses a method and a device for hot assembling a large-diameter bearing. The method comprises the following steps of: cleaning the interior and exterior of a bearing to be heated, and manufacturing a heating device; determining the dimension of a bottom plate, arranging a heating coil under the bottom plate, arranging a plurality of gas nozzles on the heating coil, connecting the heating coil with a gas bottle, and making the preparation work before heating ready; determining the heating temperature of the bearing; hanging the bearing in a sealed cavity of the heating device; igniting the gas nozzles of the heating device, and heating the bearing to the heating temperature required by the process; and hanging the bearing to a mounting position and assembling according to the requirement. In the method for hot assembling the large-diameter bearing, air in the sealed space is heated by coal gas and then directly heats the bearing, the energy consumption is low, the preparation time required is short, and the construction period can be shortened; and the oil heating is not adopted, the treatment for the waste oil is avoided, and the problem of environmental pollution caused by oil splashing and oil emission is avoided.

Description

technical field [0001] The invention relates to a method for installing a large-diameter bearing at a construction and installation site, in particular to a heat-packing method using air for heating and a heating device used in the method. Background technique [0002] In the installation of metallurgical machinery and equipment, the installation of larger diameter bearings is often encountered. The assembly of bearings is generally interference or transition fit. Even if there is a gap in the assembly, it is quite small. The method is to heat the bearing to be installed in the oil, and then install the bearing in the matching position according to the principle of thermal expansion and contraction. In the oil heating assembly technology of the prior art, the box body of the heating device is generally made of high temperature resistant steel plate, and the material and labor costs are relatively high; secondly, the material cost of the oil and the treatment cost o...

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Problems solved by technology

In the oil heating assembly technology of the prior art, the box body of the heating device is generally made of high temperature resistant steel plate, and the material and labor costs are relatively high; secondly, the material cost of the oil and the treatment cost of the waste liquid are relatively high , and with the improvement of environmental protection awareness and the improvement of related waste oil treatment standards, the treatment of waste oil needs to cost more, and there are still problems of oil spilling during the heating and assembly process that cause environmental pollution; and after After the treated waste oil is discharged, there is still some pollution to the environment; third, in some construction sites, due to special circumstances, there is still a lack of conditions for oil heating of the bearings, and oil heating cannot be used for heating. Or greatly increase the cost of oil heating, and increase the cost of bearing thermal installation

Fourth, oil heating consumes more energy, requires more preparation time, and the construction period is relatively longer

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