The working principle and function of hydraulic support
Hydraulic support is one of the key equipments in the working face of coal well mining. It mainly utilizes liquid pressure to support the roof plate, prevent the roof plate from collapsing, and create a safe working space for coal mining. Its working process is to provide high-pressure liquid through the pump station, drive the hydraulic support column and jacks and other executive elements to carry out expansion and contraction action, to realize the support of the roof, pushing scraper conveyor and pulling the bracket and other functions.
Function of emulsion in hydraulic support
Transmitting power: emulsion is the working medium in the hydraulic system of hydraulic bracket. In the hydraulic system, the emulsion can transfer the pressure energy produced by the pump station to each executive element. For example, when the hydraulic pump of the pumping station pressurizes the emulsion and then transfers it to the column of the hydraulic bracket through the high-pressure pipeline, the pressure of the emulsion pushes the piston of the column to extend, thus making the hydraulic bracket rise and generating support for the roof plate. This power transmission function is the basis for the normal work of the hydraulic support, which ensures that the support can support the roof plate timely and effectively.
Lubrication: the hydraulic components of the hydraulic support will produce relative movement in the working process, such as the sliding between the piston of the column and jack and the cylinder. The emulsion can form a lubricating film between these moving parts, reducing friction and wear. This not only reduces the failure rate of hydraulic components and extends their service life, but also reduces the energy loss due to friction and improves the efficiency of the hydraulic system. For example, in a long-running underground coal mine hydraulic support system, the maintenance and replacement frequency of the hydraulic components of the support using high-quality emulsion is significantly lower than that of the support using low-quality emulsion or poor lubrication.
Anti-rust and anti-corrosion function: the working environment of coal mine is harsh, the humidity is high, and there are a lot of corrosive substances, such as sulfide. The emulsion can form a protective film on the metal surface of the hydraulic support, preventing the metal parts from rusting and corrosion. This is crucial for the long-term stable operation of the hydraulic support. If the metal parts of the hydraulic bracket are rusted, it will lead to a decrease in its strength, deterioration of sealing performance, and even possible damage to the parts, affecting the safety and reliability of the entire bracket.
Importance to coal well mining
Ensure safe production: good emulsion performance can ensure that the hydraulic support can stably support the roof plate. In the process of coal mining, the stability of the roof plate is one of the key factors for safe production. If the hydraulic support fails to work properly due to emulsion problems, the roof slab may collapse, causing serious accidents such as casualties and equipment damage. For example, in some coal mine accident cases, it is found that it is due to emulsion leakage or failure, which causes the hydraulic support to lose its supporting ability and triggers roof accidents.
Improve the mining efficiency: emulsion provides guarantee for the normal operation of the hydraulic support, which can make the coal mining machine, scraper conveyor and hydraulic support work efficiently together. When the hydraulic support can quickly and accurately complete the action, such as moving the frame in time, pushing the slip, etc., the coal mining work can be carried out smoothly, thus improving the efficiency of the whole coal mining. For example, in the automated coal mining face, the good performance of the emulsion is an important prerequisite for the hydraulic support to realize automated control, which can shorten the cycle time of the coal mining operation and increase the coal production.
Reducing equipment maintenance costs: Due to the lubrication and anti-rust function of emulsion, it can reduce the wear and corrosion of hydraulic components of hydraulic support, and reduce the frequency of equipment maintenance and replacement. This can save a lot of equipment maintenance costs and replacement costs for coal enterprises. Moreover, the reduction of equipment maintenance time can also improve the utilization rate of the equipment and indirectly improve the economic benefits of the enterprise.
Translated with DeepL.com (free version)
