The differences between emulsified oil and concentrate for hydraulic supports, and how to use emulsified oil for hydraulic supports.
发布时间：2022年09月20日 09:36
Emulsified oil and concentrate for hydraulic supports are suitable as power transmission media for coal mines, single hydraulic props, hydraulic electric furnaces, and other similar systems. They can effectively protect hydraulic systems and extend their service life.
The electro-hydraulic control system serves as the control center for hydraulic supports, and the hydraulic oil used in these supports is the lifeblood of both the electro-hydraulic control system and the hydraulic supports themselves. Therefore, whether the hydraulic oil is used correctly will directly affect the normal operation of the hydraulic support system—and consequently, impact the entire coal mine’s production operations.
Currently, the hydraulic oils mainly used for hydraulic support systems are concentrated fluids for hydraulic supports and emulsified oils for hydraulic supports. The two types differ significantly from each other. Therefore, special attention should be paid during use to avoid unnecessary losses.
The concentrated liquid for hydraulic supports is a new research achievement developed in recent years by the China Coal Research Institute. It was specially designed for electro-hydraulic control systems that demand high filtration accuracy. This liquid represents a single-phase, stable system and serves as a substitute for conventional emulsified oils used in hydraulic supports.
Emulsified oil for hydraulic supports is an early type of transmission hydraulic oil that was originally designed primarily for hydraulic systems. Composed of water and oil, it is relatively unstable; thus, during use, it tends to develop issues such as oil separation and soap formation, leading to blockages in electro-hydraulic control systems and support structures, rendering the support mechanisms ineffective and disrupting normal production. Due to the different manufacturing processes of concentrated oils and emulsified oils, they must not be mixed during use. Mixing these two types of oil can disrupt normal production operations and increase overall equipment maintenance costs.
Here are some precautions and instructions on how to use emulsified oil with hydraulic supports:
Dilute with water and use according to the manufacturer’s recommended ratio. Slowly add the concentrate to water and stir thoroughly. During use, ensure that the concentrate and water are thoroughly mixed; absolutely avoid mixing in any foreign objects such as metal shavings or thread fibers. Do not ingest. Keep away from open flames. Emulsified oils and concentrates must not be mixed.
Rust and Corrosion Resistance Test for Emulsified Oil Used in Hydraulic Supports
In the rust-prevention test of emulsified oil diluents, cast iron remained free from rust and discoloration under conditions of 10–35°C for 24 hours. In the corrosion-resistant test, steel bars showed no signs of rust, and brass bars exhibited no discoloration or corrosion when exposed to conditions of 70°C ± 2°C for 24 hours. The primary purpose of these tests is to evaluate the anti-corrosion and rust-prevention performance of emulsified oils, thereby reducing corrosion and extending the service life of equipment.
Compatibility Test of Emulsion Oil Seal Materials for Hydraulic Supports
The compatibility test for emulsified oil dilution sealing materials uses nitrile rubber sheets. Under conditions of 70℃ ± 2℃ and 168 hours, the material’s physical swelling rate shall not exceed 6%. The primary requirement is that the emulsified oil sealing material must exhibit excellent compatibility to prevent damage to the hydraulic support seals and subsequent oil leakage.
The above is a summary of the differences between emulsified oil and concentrate for hydraulic supports, as well as instructions on how to use emulsified oil for hydraulic supports. If you have any needs, please feel free to contact us!
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