Electromechanical hydraulic hybrid power transmission device for cutting part of coal mining heading machine

Abstract

The invention discloses an electromechanical hydraulic hybrid power transmission device for a cutting part of a coal mining heading machine. The device comprises an input shaft, a hydraulic torque converter, a first planet row, a clutch, a second planet row and a third planet row, wherein the hydraulic torque converter comprises a turbine and a pump wheel; the turbine is connected with the input shaft; the pump wheel is connected with a sun wheel of the first planet row; a planet carrier of the first planet row is connected with a driving disc of the clutch; a driven disc of the clutch is connected with the input shaft; a gear ring of the first planet row is fixedly connected with a sun wheel of the second planet row; a planet carrier of the second planet row is fixedly connected with a sun wheel of the third planet row; a planet wheel of the third planet row is connected with an output shaft. On the premise of taking the efficiency of a transmission system into full consideration, compared with a power transmission system for a cutting part of the existing coal mining heading machine, the electromechanical hydraulic hybrid power transmission device for the cutting part of the coal mining heading machine has the advantages that self-adaptive stepless speed variation is realized; a rock is broken forcibly through reflux power; safety protection is realized by the clutch; buffering and damping are realized by a hydraulic reflux speed-adjusting device.

Description

technical field [0001] The invention belongs to the technical field of power transmission of a coal mining roadheader, and in particular relates to an electromechanical-hydraulic composite power transmission device for a cutting part of a coal mining roadheader. Background technique [0002] At present, the structure type commonly used in the power transmission system of the cutting part of the traditional coal mining roadheader is cutting motor + two-stage planetary reduction device + cantilever and cutting head, which has the advantages of simple structure, high transmission efficiency, and short structure size. Features, but the disadvantage is that it can only reduce the speed and adjust the speed, and the speed can only be adjusted by changing the gear manually. To realize the change of the cutting speed of the cutting head, for coal seam rock breaking, the instantaneous power of the cutting motor is used to greatly increase the output torque to achieve it. However, whe...

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Problems solved by technology

[0002] At present, the structure type commonly used in the power transmission system of the cutting part of the traditional coal mining roadheader is cutting motor + two-stage planetary reduction device + cantilever and cutting head, which has the advantages of simple structure, high transmission efficiency, and short structure size. Features, but the disadvantage is that it can only reduce the speed and adjust the speed, and the speed can only be adjusted by changing the gear manually. To realize the change of the cutting speed of the cutting head, for coal seam rock breaking, the instantaneous power of the cutting motor is used to greatly increase the output torque to achieve it. However, when the cutting motor is in the state of instantaneous power, its operating efficiency is low and the heat generation is large. Instantaneous power states are difficult to sustain

[0003] The disadvantages of the prior art are: the power transmission system of the cutting part of the existing coal roadheader can only be decelerated, and the limited stepped speed regulation is realized by artificially replacing the gear, which is inconvenient to operate and has a small speed regulation range; and For coal seam rock breaking, the instantaneous power of the cutting motor is used to greatly increase the output torque. However, when the cutting motor is in the state of instantaneous power, its operating efficiency is low and the heat generation is large, and the state of instantaneous power is difficult to last.

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