工作面液压系统流量补偿技术研究

赵叔吉

doi:10.13272/j.issn.1671-251x.2023080060

工作面液压系统流量补偿技术研究

doi: 10.13272/j.issn.1671-251x.2023080060

赵叔吉^{1, 2,}

1.
中煤科工开采研究院有限公司，北京　100013
2.
煤炭科学研究总院开采研究分院，北京　100013

基金项目: 国家自然科学基金面上项目（51874174，51974159）;天地科技创新创业资金专项重点项目（2020-TD-ZD005）；中煤科工开采研究院有限公司科技创新基金面上项目（KCYJY-2024-MS-08）。

详细信息

作者简介:
赵叔吉（1993—），男，山东临沂人，助理研究员，博士，主要从事煤矿智能化技术研究与实践工作，E-mail：zhao-sj16@tsinghua.org.cn

中图分类号: TD355
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- 被引次数: 0
出版历程
- 收稿日期: 2023-08-18
- 修回日期: 2024-02-17
- 网络出版日期: 2024-03-01

Research on flow compensation technology for hydraulic system in working face

ZHAO Shuji^{1, 2
,}

1.
CCTEG Coal Mining Research Institute, Beijing 100013, China
2.
Mining Research Branch, China Coal Research Institute, Beijing 100013, China

摘要

摘要: 目前工作面液压系统的优化研究对连续推进过程中液压系统压力流量特性的分析较少，对液压系统压力流量波动问题缺乏简单有效的解决方案。针对工作面快速移架需求，以张家峁煤矿2⁻²煤层新建大采高工作面为工程背景，采用AMEsim软件建立了单台液压支架和成组液压支架仿真模型，基于自动跟机移架中千斤顶的动作时序，对煤炭开采过程中液压支架移架推溜过程进行仿真，分析了不同数量液压支架同时动作时工作面液压系统的压力流量变化情况，指出移架过慢的原因是液压支架瞬时需液量超过泵站最大流量，同时在液压支架成组运动过程中存在瞬时需液量不足和部分时刻泵站供液能力过剩的矛盾。针对液压系统间歇性大流量需求，提出了基于蓄能器的流量补偿技术，通过仿真验证了安装蓄能器后液压系统的压力波动被明显抑制，各千斤顶运动速度明显提升。在张家峁煤矿新建工作面对基于蓄能器的流量补偿技术进行现场试验，结果表明接入蓄能器后，液压系统平均压降降幅达74.1%，压力波动受到明显抑制，验证了流量补偿技术可满足液压系统间歇性大流量需求，为快速移架提供保障。
- 工作面 /
- 液压支架 /
- 自动跟机移架 /
- 快速移架 /
- 液压系统 /
- 流量补偿 /
- 蓄能器
Abstract: Currently, there is a lack of analysis on the pressure and flow characteristics of hydraulic systems during continuous propulsion in the optimization research of working face hydraulic systems. There is a lack of simple and effective solutions to the problem of pressure and flow fluctuations in hydraulic systems. In response to the demand for rapid support movement of the working face, with the construction of a new large mining height working face in the 2⁻² coal seam of Zhangjiamao Coal Mine as the engineering background, a single hydraulic support and a group hydraulic support simulation model are established using AMEsim software. Based on the action timing of the jack in the automatic follow-up and support movement, the hydraulic support movement and sliding process during coal mining are simulated. The study analyzes the pressure and flow changes of the hydraulic system in the working face when different numbers of hydraulic supports act simultaneously. It is pointed out that the reason for the slow movement of the supports is that the instantaneous liquid demand of the hydraulic supports exceeds the maximum flow rate of the pump station. At the same time, there is a contradiction between insufficient instantaneous liquid demand and excess liquid supply capacity of the pump station at some times during the movement of the hydraulic supports. Aiming at the intermittent high flow demand of hydraulic systems, a flow compensation technology based on accumulators is proposed. Through simulation verification, the pressure fluctuation of the hydraulic system is significantly suppressed after the installation of accumulators, and the movement speed of each jack is significantly improved. On site experiments are conducted on the flow compensation technology based on accumulator in the new construction working face of Zhangjiamao Coal Mine. The results show that after the accumulator is connected, the average pressure drop of the hydraulic system decreases by 74.1%, and the pressure fluctuation is significantly suppressed. This verifies that the flow compensation technology can meet the intermittent high flow demand of the hydraulic system and provide guarantees for rapid support movement.
- working face /
- hydraulic support /
- automatic follow-up and support movement /
- rapid support movement /
- hydraulic system /
- flow compensation /
- accumulato

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图 1 支架液压系统子模型

Figure 1. Submodels of support hydraulic system

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图 2 立柱子模型

Figure 2. Submodel of columns

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图 3 单台液压支架仿真模型

Figure 3. Simulation model of single hydraulic support

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图 4 仿真模型中各千斤顶动作时序

Figure 4. Each jack action timing of simulate model

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图 5 液压系统仿真模型

Figure 5. Simulation model of hydraulic system

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图 6 推移千斤顶行程随时间变化曲线

Figure 6. Displacement change curves of push jack over time

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图 7 立柱行程随时间变化曲线

Figure 7. Displacement change curves of columns over time

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图 8 泵站的输出压力

Figure 8. Output pressure of pump station

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图 9 安装蓄能器后的液压系统仿真模型

Figure 9. Simulation model of hydraulic system with accumulators

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图 10 安装蓄能器后推移千斤顶行程随时间变化曲线

Figure 10. Displacement change curves of push jack over time with accumulators

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图 11 安装蓄能器后立柱行程随时间变化曲线

Figure 11. Displacement change curves of columns over time with accumulators

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图 12 蓄能器压力曲线

Figure 12. Pressure curve of accumulator

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图 13 安装蓄能器后泵站输出压力曲线

Figure 13. Output pressure curve of pump station with accumulators

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图 14 现场试验及结果

Figure 14. Field experiment and its result

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表 1 张家峁煤矿2⁻²煤层新建工作面中部液压支架部分参数

Table 1. Part parameters of hydraulic support in the middle of new working face of Zhangjiamao Coal Mine 2⁻² coal seam

参数	值	参数	值
支架结构高度/mm	3 700～8 000	立柱中心距/mm	1 110
支架宽度/mm	1 950～2 200	推移步距/mm	800
支架中心距/mm	2 000	质量/t	80

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表 2 液压支架立柱和千斤顶结构参数

Table 2. Structural parameters of hydraulic support columns and jacks mm

结构名称	缸径	杆径	行程
立柱	530/380	500/355	2 090/2 090
推移千斤顶	250	160	1 080
平衡千斤顶	320	230	750
伸缩千斤顶	125	85	900
一级护帮千斤顶	160	105	900
二级护帮千斤顶	140	95	295
三级护帮千斤顶	80	60	360
抬底千斤顶	200	140	320

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