Light and heavy fuel booster pump

The light and heavy fuel booster pump is a volumetric boosting and conveying component designed for industrial fuel supply conditions. It is compatible with the transportation of low viscosity light diesel oil, high viscosity fuel oil, and heavy diesel oil. It is divided into room temperature ordinary type and jacket insulation type, and is matched with asphalt mixing stations, industrial boilers, heating furnace burners for fuel supply and boosting systems. It can also be used for fuel tank medium transportation, fuel pre-treatment and transportation processes. The equipment supports continuous pressure boosting and oil supply around the clock, and can also be matched with production line start stop to achieve intermittent oil supply operation mode.

The entire unit consists of a pump body, front and rear pump covers, heat-treated alloy master and slave gears, quenched and tempered transmission shaft, floating thrust plate, shaft end sealing component, and built-in reflux valve to form a conveying unit. The gears have undergone chemical treatment and are resistant to erosion, which can cope with the working conditions of trace gum impurities inside the fuel; Multiple axial force balancing channels are arranged inside the cavity to counteract the unidirectional axial thrust generated by gear operation under pressure boosting conditions, reduce unilateral wear of the thrust plate, and ensure smooth vibration of the entire machine during long-term continuous operation. The internal moving components rely on the transportation of fuel for self lubrication, without the need for additional independent lubrication oil circuits, simplifying the on-site pipeline layout. The insulation style pump body and pump cover are equipped with a surrounding insulation layer, which can be continuously heated by steam and heat transfer oil to avoid heavy oil cooling agglomeration and gear jamming after shutdown. Some models are equipped with end face clearance fine-tuning mechanisms, which can adjust the clearance without disassembling the entire machine to restore the rated boosting performance after the long-term operation of the boosting ability deteriorates.

After the device is connected to the driving power, the motor drives the gear to rotate synchronously and uniformly through an elastic coupling. The gear teeth disengage and the cavity volume continues to expand, forming negative pressure. The fuel inside the storage tank is filled into the gap between the gear teeth through a widened and smooth oil inlet channel. As the gears continue to rotate, the grooves carry the medium to the oil pressure area, and the gears re engage with the compression chamber volume. After the fuel is pressurized, it is transported to the burner pipeline, and the entire process of suction, transportation, pressurization, and discharge runs continuously. The pump body adopts a smooth flow channel without dead corners, which balances the efficiency of light diesel oil circulation and the demand for high viscosity heavy oil transportation. The flow pulsation amplitude is small, and the fuel supply pressure of the burner remains stable, ensuring full atomization and combustion of the fuel.

The pump body is integrated with a built-in reflux valve, which is responsible for short-term overload protection and has a preset opening pressure at the factory. When the outlet pipeline is blocked, the valve is closed, and the pressure inside the chamber exceeds the rated range, the valve automatically opens, and some medium flows back to the oil suction chamber to release high pressure, reducing the damage of pressure impact to the pump body, fuel pipeline, and burner nozzle. This structure is only suitable for temporary protection in case of sudden blockage and cannot be used as a voltage regulator for a long time. When there is a need for voltage regulation under working conditions, independent pressure regulating accessories can be installed on external pipelines to work together. The inner wall of the pump body has been smoothed to reduce the adhesion and accumulation of gum and carbon deposits, and to alleviate the problem of decreased volumetric efficiency caused by long-term operation. The equipment has basic self-priming ability, and only a small amount of medium needs to be pre filled into the cavity for initial startup, simplifying the startup operation process.

The sealing matching can be selected based on the temperature of the medium and the viscosity of the oil, using either packing seals or hard alloy mechanical seals. Select anti swelling sealing accessories for diesel transportation conditions; Select sealing components for high-temperature heavy oil operating conditions. The sealing component tightly fits the gap between the transmission shaft and the pump cover, reducing the risk of fuel leakage, while blocking dust and water vapor from entering the cavity to prevent hard impurities from scratching the gear tooth surface. The disassembly and assembly process of sealing accessories has been optimized, and daily maintenance does not require the overall disassembly of the pump body. Only the outer pump cover can be replaced, shortening the downtime of the production line. The temperature of the conventional sealing medium should not exceed 200 ℃, and special sealing components can be upgraded for continuous high temperature conditions.

At the medium adaptation level, this series of light and heavy fuel booster pumps is suitable for transporting fuel media that do not contain hard metal particles, long fiber impurities, and have lubricating properties. The medium's kinematic viscosity range is 5 to 1500mm ²/s, and it is suitable for industrial fuel categories such as light diesel, heavy diesel, and fuel oil. Cast iron models are suitable for clean and low viscosity diesel transportation; Cast steel insulation models are preferred for high viscosity heavy oil pressure boosting transportation; Paired with motor units, it can meet the oil supply needs of mixing stations and chemical workshops. The equipment is not suitable for transporting highly corrosive and volatile media with flash points. Metal components in contact with the medium have undergone rust prevention treatment, making them suitable for outdoor dusty and temperature sensitive working environments such as boiler rooms and asphalt mixing stations.

In terms of installation and matching, the horizontal base of the whole machine is reserved with standard anchor fixing holes, and the installation is stable on the ground. The inlet and outlet can be flexibly adjusted according to the layout of the fuel pipeline, and the large-diameter interface reduces the resistance of medium transportation. The power end is equipped with an elastic coupling, and the coaxiality is calibrated during the assembly process to buffer the hydraulic impact generated by the boost working condition and reduce unilateral wear of the transmission shaft. Install a large area pre filter on the suction pipeline, with a flow area larger than the cross-sectional area of the inlet pipe, to intercept impurities from the bottom of the storage tank and prevent damage to the gear tooth surface; All pipeline joints are equipped with oil resistant sealing gaskets to prevent air from infiltrating the chamber and causing fluctuations in oil supply pressure. Before starting, check that the motor direction is consistent with the pump body identification; When transporting high viscosity fuel with insulation models, priority should be given to preheating the pump body with a heat source. It is prohibited to forcibly start the pump when the medium is solidified, and it is also strictly prohibited to fully close the outlet valve and operate it under pressure for a long time.

At the level of daily maintenance operations, the pump body adopts modular assembly, and the alloy gear, thrust plate, seal, and pump cover can be separated and removed separately. General and simple tools can be used to complete the disassembly, making it easy to regularly clean the carbon deposits and gum impurities inside the cavity, and check the wear status of the gear and thrust plate. The meshing force of the gears is balanced, and the overall vibration amplitude of the machine is low. With the use of shock-absorbing gaskets, the operating noise is controllable, and it is suitable for the uninterrupted boosting and oil supply mode of the production line throughout the day. Maintaining the cleanliness of the inlet filter on a daily basis, regularly checking for seal leakage, controlling the temperature range of the medium, avoiding long-term overload operation of the equipment, and adjusting the end face clearance as needed when the boosting capacity decreases can extend the service life of gears and sealing accessories and reduce the frequency of unplanned shutdowns on the production line. After a long-term shutdown, the insulation machine continues to maintain the temperature of the chamber while emptying the residual high viscosity fuel in the pump to prevent the medium from cooling, solidifying, and jamming the gear components.

During long-term use, the equipment failure rate is relatively low. As long as we adhere to media pre filtration, regular quarterly inspections, and standardized start stop operations, the core components can maintain stable pressure boosting and oil supply conditions for a long time. There are no large areas of dead corners in the internal flow channel. After shutdown, a clean fuel circulation flushing chamber is introduced to reduce the problems of insufficient pressure rise and flow decline caused by the accumulation of gum carbon, reduce the frequency of disassembly and cleaning of the whole machine, and ensure the stable operation of the entire fuel combustion system.

Overall, the light and heavy fuel booster pump relies on alloy gears, optional jacket insulation and gap fine adjustment structure, built-in overload valve, and is suitable for high and low viscosity industrial fuel boosting and transportation needs. The boosting output is stable and suitable for asphalt mixing stations and industrial boiler burner fuel supply conditions, which can meet the basic requirements of long-term continuous and stable pressure boosting and transportation of light and heavy fuel on production lines.