Light and heavy fuel booster delivery pump

Light and heavy fuel booster delivery pump is a volumetric booster delivery component designed for industrial fuel supply conditions. It can meet the transportation needs of low viscosity light diesel oil, high viscosity heavy oil, and fuel oil. It is divided into room temperature basic type and jacket insulation type, and is used in asphalt mixing stations, industrial boilers, and heating furnace burner fuel supply booster systems. It can also be used for fuel tank transfer, fuel pre-treatment and delivery processes. The equipment supports 24/7 continuous pressurized fuel supply and can also follow the start stop of the production line to perform intermittent fuel supply operations.

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 components, and built-in reflux valve to form the conveying unit. The gears have undergone chemical treatment, are resistant to erosion, and can adapt to the working conditions of trace gum impurities in fuel; A multi-channel axial force balance flow channel is installed inside the cavity to counteract the unidirectional axial thrust generated by the gear under pressurization conditions, reduce the wear of the thrust plate on one side, and ensure stable operation for a long time. The internal moving components rely on the self lubrication of fuel delivery, without the need for additional independent lubrication oil circuits, simplifying the on-site pipeline layout. The insulation type pump body and pump cover are integrated with a surrounding insulation layer, which can be supplied with steam and heat transfer oil to prevent heavy oil from cooling and blocking gears after shutdown. Some models are equipped with end face clearance adjustment mechanisms, which can restore the boosting and conveying performance without disassembling the entire machine after pressure attenuation.

After the device is connected to the driving power, the motor drives the gears to rotate synchronously through an elastic coupling. The volume of the cavity on the side where the gears disengage continues to expand, forming negative pressure. The fuel in the storage tank is filled into the gear teeth gap 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 interlock to compress the chamber volume. The fuel forms a stable pressure and is transported to the burner pipeline. The entire process of suction, transportation, pressurization, and discharge runs continuously in a cycle. 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, the fuel supply pressure of the burner is stable, and the fuel is fully atomized and burned.

The pump body is integrated with a built-in reflux valve, which provides short-term overload protection and 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 serve as a stabilizing device for a long time. If the working conditions require stabilizing, independent pressure regulating accessories can be installed in the external pipeline 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 delay the flow attenuation caused by long-term operation. The equipment has basic self-priming ability and can be put into operation with a small amount of pre filled medium upon initial start-up.

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; High temperature heavy oil working conditions with sealing components. 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, and preventing 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. Conventional sealing is suitable for medium temperatures not exceeding 200 ℃, and special sealing components can be upgraded for long-term high-temperature conditions.

At the medium adaptation level, this light and heavy fuel booster delivery pump is suitable for delivering 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 diesel transportation; Steel casting insulation models prioritize the transportation of high viscosity heavy oil; Paired with motor units, it can meet the oil supply needs of mixing stations and chemical workshops. The equipment is not suitable for conveying strongly corrosive and highly volatile media. Metal components in contact with the medium have undergone rust prevention treatment, making them suitable for industrial sites with high dust and large temperature differences in the open air.

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 direction of the pipeline, and the large-diameter interface reduces the resistance of medium transportation. Install an elastic coupling on the power end, calibrate the coaxiality during installation, buffer hydraulic impact, and reduce unilateral wear of the transmission shaft. Install a pre filter in 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 them from entering the pump chamber; The pipeline joints are equipped with oil resistant sealing gaskets to prevent air infiltration and oil supply pressure fluctuations. Before starting, check that the motor direction is consistent with the markings; The insulation machine needs to preheat the pump body in advance when transporting heavy oil. It is strictly prohibited to start the pump forcibly when the medium is solidified. At the same time, it is forbidden 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 disassembled separately. Ordinary and simple tools can be used to complete the disassembly, making it convenient to regularly clean the cavity volume of carbon and gum impurities, and check the wear status of the gear and thrust plate. The meshing force of the gears is balanced, the overall vibration amplitude of the machine is low, and the operation noise is controllable with shock-absorbing gaskets, which is suitable for the uninterrupted production mode of the production line. Keep the inlet filter clean on a daily basis, regularly check for seal leaks, control the temperature range of the medium, avoid long-term overload operation, adjust the end face clearance as needed when the pressure drops, extend the service life of gears and seals, and reduce unplanned shutdowns. After long-term shutdown, the insulation machine maintains the temperature of the chamber and empties residual heavy oil to prevent solidification and jamming of the gear components.

During long-term use, the equipment failure rate is relatively low. By adhering to media pre filtration, regular inspections, and standardized start stop, the core components can maintain stable pressure boosting and conveying capacity for a long time. There are no large areas of dead corners in the internal flow channel. After shutdown, clean fuel circulation flushing chamber is introduced to reduce the frequency of disassembly and cleaning due to insufficient boost and unstable flow caused by carbon and gum accumulation. The entire fuel combustion system operates stably.

Overall, the light and heavy fuel booster delivery 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 booster delivery, with stable output pressure. It is applied in asphalt mixing stations and industrial boiler burner fuel supply systems, and can meet the long-term continuous and stable pressure boosting delivery needs of light and heavy fuel on production lines.