Recently, organized by Hunan Science and Technology Department and organized by the Science and Technology Bureau of Hengyang City, the Science and Technology Achievement Evaluation Project of the “Two-stage Pressure-limiting Variable Displacement Vane Oil Pump Development” project completed by Hunan Engine Oil Pump Co., Ltd. was held. A new type of variable control mode was pioneered, and a two-stage pressure-limiting variable displacement vane type variable control method was proposed. A variable control system was independently developed and has obvious energy-saving effects. According to this method, the vane-type machine was successfully developed for the first time in China. The oil pump products and samples passed the type test of the Hunan Provincial Internal Combustion Engine Quality Supervision and Inspection Authorization Station, and they were used by users and reflected well. The overall technology of the project's achievements has reached the international advanced level.

Hunan Engine Oil Pump Co., Ltd., as the leading enterprise in the domestic internal-combustion engine oil pump industry, established a dedicated team two years ago to start the research and development of variable displacement oil pump and intelligent lubrication cooling module. After the successful development and promotion of this technology, the country can save 1.1 billion liters of gasoline a year and save nearly 10 billion yuan in fuel costs.

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Hydraulic Core Drilling Rigs / Geotechnical Exploration Small Water Well Drilling Rig Machine

Bore hole water well drilling machine is a kind of widely used portable drill machine. Water well drilling rig is suitable for drilling water well, geological survey, geological core drilling, small grouting holes, blasting holes of railway, water conservancy, bridges, dam foundation and other buildings. According to different strata, it drills by choosing different bits, such as, diamond composite films and alloy.

Main features
1. It improves drilling efficiency and reduces labor intensity with hydraulic automatic feeding mechanism
2. It can be achieved without stopping to change rods, easy to operate, safe and reliable with ball clip holding mechanism or hydraulic chuck.
3. It has hole bottom pressure gauge to be easy to master the situation in the hole
4.It also has advantage of compact structure,concentrated handle, small footprint, light weight, strong decomposition, easy to move. It can be operated in plains and mountain areas.

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