A heat grinder grinding device

Abstract

The invention provides a hot mill grinding device which is composed of a rotating grinding disc, an axial moving grinding disc, a main shaft, a rear bearing, a rear bearing base, a thrust plate, a hydraulic thrust bearing, a front bearing base, a front bearing, a mechanical sealing device, a grinding chamber shell, a side opening door, four guide cylinders, a grinding disc clearance adjusting mechanism and a machine base. The rotating grinding disc moves along with rotation of the main shaft, and the axial moving grinding disc is driven by the grinding disc clearance adjusting mechanism to conduct axial movement. The grinding disc clearance adjusting mechanism is arranged on the outer side of the side opening door. One end of a lead screw of a worm wheel worm lead screw nut combination mechanism of the grinding disc clearance adjusting mechanism is fixed to the side opening door. The front bearing base, the rear bearing base and the thrust plate are fixed to the machine base. A front end cantilever of the main shaft is shortened in length, and the operation stability and reliability of a main shaft system are improved, so that the radial run-out error of the end of the main shaft and the end face run-out error of the rotating grinding disc are reduced, parallelism between the two grinding discs and the grinding disc clearance evenness and stability are guaranteed, and finally the quality of grinded fiber is guaranteed.

Description

technical field [0001] The invention belongs to the field of wood processing equipment and relates to fiberboard manufacturing equipment, in particular to a grinding device of a thermal grinder. Background technique [0002] Refiner is one of the key equipments for fiberboard manufacturing, which is used to separate the wood chips after cooking and softening into fibers. The heat refiner is mainly composed of a screw feeder, a preheating cooking tank, a grinding device and a discharge device. The grinding device is the main body of the heat refiner and has a direct impact on the quality of the fiber to be ground. Existing thermal grinder grinding device is mainly composed of grinding chamber shell, fixed grinding disc, movable grinding disc, spindle system and so on. The fixed grinding disc is fixed on the shell of the grinding chamber or the side door, and the movable grinding disc is installed at the end of the main shaft and moves together with the main shaft. The adjus...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems caused by the matching gap between the bearing sleeve and the bearing seat sleeve and the long cantilever at the front end of the main shaft existing in the main shaft structure of the grinding device of the thermal grinding machine, the present invention provides a new type of grinding device for the thermal grinding machine

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