Inner atomizing inlet rotary seal structure

Abstract

The invention discloses an internal spraying water inlet rotary seal structure for a development machine and a coal-winning machine. The structure of the internal spraying water inlet rotary seal structure is as follows: a gear cluster ganged transmission structure is adopted between a main shaft of a cutting arm and an output shaft of a speed reducer, so that end parts of the two shafts are disconnected to form a space; a spraying water inlet channel in the main shaft of the cutting arm is communicated with the end face of the main shaft of the cutting arm, namely a water inlet is arranged on the end face of the main shaft of the cutting arm; a cross section of the output shaft of the speed reducer is provided with a counter bore; and a T-shaped water guiding piece is arranged inside thespace which is formed by the end parts of the two shafts. Because a water outlet of the T-shaped water guiding piece is directly inserted into the water inlet of the main shaft, the diameter of rotary seal is small and the linear velocity is low compared with radial seal of the prior gland cover under the condition of the same rotary speed of the main shaft, the service life of a sealing element is long and water leakage is difficult to generate. Moreover, leaked water can be exhausted out of the cutting arm through a diversion cut arranged under the condition of poor sealing of inlet water, and damage can not be caused on the transmission structure in the cutting arm.

Description

technical field [0001] The invention relates to mine excavation equipment, in particular to the internal spray structure of roadheaders and coal shearers. Background technique [0002] The main shaft of the cutting arm of the existing roadheader and shearer and the output shaft of the reducer are all connected by an inner spline sleeve, which makes the spray water inlet in the main shaft must enter water from the side of the main shaft. The sealing structure of this side water inlet is to install a water inlet sleeve at the position of the water inlet on the side of the main shaft. The circumference of the water inlet sleeve has a hole communicating with the water inlet, and a circle of grooves is set. The groove corresponds to the cutting wall box. water inlet hole on the When the main shaft rotates, the water from the outside enters the main shaft spray water channel through the water inlet hole and the groove of the water inlet sleeve. The deficiency of this water-inlet...

AI Technical Summary

Problems solved by technology

The disadvantage of this water inlet rotary seal structure is that due to the long-term rotation and wear of the water inlet sleeve, there will be a series of water leakage in the gap, and the water leakage will enter the cutting arm box and affect the normal work and cause the spray to fail.

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