Abstract
In order to solve the problem of reciprocating motion in no beam supported mining machines, putting energy saving as a starting point in Coal Bed Methane (CBM) exploitation, this paper designs a completely non-circular gear automatic reversing vertical drainage machine based on the theory of non-circular gear transmission. In the field of CBM exploitation, the use of non-circular gears is an attempt at an innovation. First of all, according to the working conditions of the pump and use requirements, a scheme is established whereby the one-way rotary motion of the motor is changed into reciprocating motion so that it could drive the oil pumping rod to achieve the upper and lower mining. Secondly, this paper has designed a new type non-circular gear reversing box as the core component to replace the traditional four beam linkage mechanism and also provides elaborate calculations. Finally, the movement simulation of the non-circular gear reversing gear system is completed. Comparing the motion simulation results with the theoretical ones, the correctness of our theoretical analysis can be verified. Compared with the traditional devices, the new coal seam gas drainage machine model design has nearly 11% higher efficiency, which has obvious energy saving effects and reduces the cost of mining coal seam gas.
Highlights
Chinese coal bed methane resources are relatively rich and concentrated which makes their exploitation a relatively new clean coal industry in the world [1]
The non-circular gear automatic reversing vertical drainage machine designed in this paper abandons the four-bar linkage of beam pumping units, so there will be some improvement in the work efficiency, and we will discuss the problem of the efficiency
This paper studies the use of non-circular gear automatic reversing vertical drainage machine instead of beam pumping unit, so only the ground efficiency is analyzed
Summary
Chinese coal bed methane resources are relatively rich and concentrated which makes their exploitation a relatively new clean coal industry in the world [1]. Liu [5] and Fan [6] argue that this cannot solve the fundamental drawbacks of the crank rocker mechanism improving performance in a relatively small range and the poor adaptability and low working efficiency shortcomings of beam pumping will still exist. Based on this series of drawbacks, all kinds of new non-walking beam drainage machine have emerged.
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