Cold and hot temperature difference assembled and disassembled gear device

Abstract

The invention discloses a special cold and hot temperature difference assembled and disassembled gear device for replacing a pinion of a large-size ore treatment plant automatic mill. The special cold and hot temperature difference assembled and disassembled gear device comprises a gear cover, heating pipes, adjustment screw rods, supporting rollers, iron stools, a jack, a liquid nitrogen tank, a liquefied gas tank and a hose, wherein the gear cover is divided into two halves; a plurality of heating pipes are uniformly arranged in the cover; the heating pipes and the adjustment screw rods are movably connected; the adjustment screw rods are screwed on the gear cover and are fixed in nuts; the jack for supporting a gear is arranged at the bottom of the gear cover; shaft penetrating holes are formed in the centers of two side plates of the gear cover; hollow cooling shaft sleeves are arranged beside the holes; the cooling shaft sleeves and the supporting rollers are arranged on the two iron stools; nozzles are arranged on the heating pipes and the cooling shaft sleeves; the heating pipes and the cooling shaft sleeves are respectively connected with the liquefied gas tank and the liquid nitrogen tank. The cold and hot temperature difference assembled and disassembled gear device can be used for simultaneously heating the gear and cooling a shaft; when the temperature difference between the gear and the shaft is 200 DEG C, the shaft and the gear are convenient to assemble and disassemble; the cold and hot temperature difference assembled and disassembled gear device has the advantages of saving labor, saving time and lowering the cost along with high maintenance speed.

Description

technical field [0001] The invention relates to a large-scale self-grinding machine in an ore dressing plant, etc., which is a special cooling and heating temperature difference dismounting and assembling gear device for replacing pinion gears. Background technique [0002] At present, it is known that the pinion shaft of self-grinding machine has a diameter of 250mm, and the shaft and the gear have an interference fit. Traditionally, a press is used to disassemble the gear in the manufacturing plant, which is very convenient. There is no press in the dressing plant, and the wheel remover is used. The contact surface between the gear and the shaft is large, and the manual cold drawing of the gear is very laborious and time-consuming. When installing new gears, the gears are heated to a temperature of 200°C on the ground furnace as a whole. When the inner hole size of the gear is slightly larger than the shaft diameter, the shaft is inserted into the gear hole to cool and ass...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of time-consuming and labor-intensive replacement of the pinion in the traditional self-grinding machine, the purpose of the present invention is to provide a labor-saving and time-saving disassembly and assembly gear device with temperature difference between cold and heat

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