Press roll assembly and spindle combination device of ring die pelletizer with double-direction oil lines

Abstract

The invention relates to a press roll assembly and a spindle combination device of a ring die pelletizer with double-direction oil lines. A spindle oil outlet line (3-2) is arranged inside a spindle (3), an eccentric press roll shaft oil outlet line (2-2) is arranged inside an eccentric press roll shaft (2), an inlet (2-2-1) of the eccentric press roll shaft oil outlet line is arranged on the outer surface of the eccentric press roll shaft (2) opposite to a retainer ring (5), and an outlet (2-2-2) of the eccentric press roll shaft oil outlet line is communicated with an inlet (3-2-1) of the spindle oil outlet line. Two outlets (2-1-2) of each eccentric press roll shaft oil inlet line are respectively arranged on the outer surface of the eccentric press roll shaft (2) opposite to a clamp spring (9), and an isolating and sealing member (8) is arranged between an inlet (2-1-1) of the eccentric press roll shaft oil inlet line and the outlet (2-2-2) of the eccentric press roll shaft oil outlet line on each eccentric press roll shaft (2). The press roll assembly and the spindle combination device of the ring die pelletizer with the double-direction oil lines are good in lubricating and sealing effects and low in cost, and service life of bearings is long.

Description

technical field [0001] The invention relates to a ring die granulator, in particular to a ring die granulator pressure roller assembly and main shaft combination device with two-way oil passages. The present invention is applicable to the ring die granulator for making granular materials from bulk materials in various industries such as compound fertilizer, organic fertilizer, feed, grain, food, chemical industry, medicine, pesticide, etc., especially suitable for biomass (such as sawdust, Straw, rice husk, leaves, pasture and agricultural and forestry waste, etc.) It belongs to the technical field of granulation processing equipment. Background technique [0002] The main working parts of ring die granulator are ring die and two pressing rollers. The bulk material is drawn between the ring die and the pressure roller, and the two relative rotating parts gradually squeeze the material, and the material is squeezed into the ring die hole and formed in the ring die hole, an...

AI Technical Summary

Problems solved by technology

For the structure of the existing ring die granulator press roller assembly and main shaft combination device, see figure 1 and figure 2 , it has the following serious defects: (1) Only the oil inlet oil passage is opened on the main shaft and the eccentric shaft of the pressure roller, and the lubrication effect is poor

There are two oil passages on the main shaft, but both are oil inlet passages, and one oil passage on the eccentric shaft of the pressure roller is also an oil inlet passage, and there is only one oil inlet lubrication point for the bearing, that is, one lubrication point lubricates a pair of Bearings, the middle of the two bearings is the oil-in lubrication point, especially the paste butter used in the prior art, which has high viscosity, poor fluidity and dispersion, and the bearings cannot be fully lubricated. If it is in a low temperature area Or seasonal use, the viscosity of the butter is higher, the fluidity and dispersion are worse, and the bearing lubrication effect cannot be guaranteed at all; and because there is no oil outlet, it is impossible to grasp and control the internal oil supply situation, only to estimate the internal oil condition, and The added oil cannot be replaced, and new oil can only be added after the oil is consumed by itself. The internal oil is dirty and clean because it has not been replaced for a long time, and the impurities in the oil cannot be removed in time, resulting in The bearing lubrication effect is poor, which increases the temperature rise of the bearing and shortens the service life of the bearing; in addition, since the other end of the eccentric pressure roller shaft oil inlet is provided with a manual oil inlet, no matter whether the butter is added from the manual oil inlet at one end or from the other If the inlet of the eccentric roller shaft at one end enters the oil inlet, the butter will be squeezed into the oil inlet on the other side, which prevents the butter from being fully fed into the lubricating point from the outlet of the eccentric roller shaft.

Therefore, the lubrication effect is poor; (2) The service life of the bearing is short and the cost is high

On the one hand, tapered roller bearings are used for bearings in the prior art, such as tapered roller bearings with a model number of 7516. The ring die granulator requires that the bearings do not need to bear axial force, but the radial bearing capacity is stronger. Roller bearings are subjected to both radial and axial forces during work, which weakens the bearing's ability to withstand radial forces and reduces the service life of the bearings; The temperature of the bearing cannot be cooled during the lubrication process, and the temperature rise of the bearing also greatly reduces the service life of the bearing

Therefore, the service life of the bearings is very short, and the service life of a pair of bearings is only two to three days. The frequent need to replace the bearings not only increases the use cost of the ring die pellet mill, but more importantly, the huge cost caused by the shutdown of the bearing replacement and maintenance loss, resulting in increased production costs; (3) poor sealing effect

The lubricating oil used in the prior art is butter, and the mechanical Migong seal is adopted. The inner oil deflector ring and the outer oil deflector ring are used as seals at both ends of the bearing. The outer oil deflector ring and the inner diameter of the pressure roller There are gaps, not dustproof, easy to leak oil, and the sealing effect is not good; (4) The bushing is a copper sleeve

In the prior art, the bushing is generally a copper bushing, the copper bushing is soft, not wear-resistant, easy to deform after use, and the price is relatively high

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