Coal mine requirements for emulsified oil of hydraulic support are as follows:
Hydraulic support is a mechanical equipment installed on the working surface of coal mine. Since coal is spontaneous combustion under conditions, dust equipment for coal may cause a fire or even an explosion in the coal face and its adjacent workings, because coal is spontaneous combustion under conditions. Therefore, the transmission medium used in the hydraulic support is mine production, which can neither ignite nor support combustion; Hydraulic support emulsified oil can only work normally if it has the above points.
(1) Economy: the number of hydraulic supports in comprehensive mining face usually reaches 100-150. The various pipes connected to the pumping station can be up to 56 km in length. Therefore, only on the work surface to install and lift these brackets, generally require about 10t of liquid. Moreover, due to more joints and sealing points, the pump station uses a higher output pressure, so that the support has enough initial support, the pipeline may be damaged by gangue leakage, transmission media due to cleaning and greater loss, not only a wide range of sources, but also the use of cheap hydraulic transmission media.
(2) Anti-rust lubrication: underground working face hydraulic support is composed of various metal parts, high load, long cycle, the need of hydraulic transmission medium anti-rust lubrication.
(3) Viscosity and viscosity temperature performance: comprehensive mining face hydraulic support pipeline is long, the pump station is generally set in the water tank. In order to reduce the energy loss of friction in the transmission medium, high viscosity transmission media should not be used.
(4) Stability: The hydraulic medium used in the underground support has stability and works normally with the hydraulic transmission medium.
(5) Adaptability of sealing materials: In order to ensure good working performance of hydraulic support, in addition to requirements and processing accuracy, it also depends on the adaptability of hydraulic medium to sealing materials, that is, sealing materials will not over-shrink and expand, leading to sealing failure or action failure.
(6) No impact on human skin: hydraulic support in the process of use, due to the replacement of pipelines, valves, cleaning of fuel tanks and maintenance, inevitably contact with the hydraulic transmission medium. Therefore, the hydraulic transmission medium has no effect on human skin.
(7) Environment: Due to the large use of hydraulic media, direct discharge, no purification equipment, hydraulic transmission media on groundwater resources pollution is small.
