Among the many domestic excavator brands, Lovol Heavy Industries is definitely a rising star. From the first small excavation FR60-7 in 2006, to the excavation FR220D and now to the dig FR480E, Lovol Heavy Industries has achieved a triple jump of products and technology in just 10 years. As a typical representative of the E series, the FR480E large excavator is jointly built by Chinese and foreign experts. It integrates many advanced technologies to meet the national emission standards. At the same time, it has achieved many technological breakthroughs in terms of intelligence, efficiency, safety, reliability and convenience. . Intelligent and efficient Technically speaking, it is not difficult to realize excavation, loading, crushing and other operations. The difficulty lies in satisfying the reliability and durability, and ensuring that it can complete various compound operation actions intelligently and efficiently. The key to achieving this goal is whether the control system for the excavator is advanced and reasonable. At present, the excavator control system mainly has a negative flow control system and a positive flow control system. The negative flow control system has a simple structure and low cost. The disadvantage is that after the main valve is collected, a certain pressure needs to be established. Relatively speaking, the feedback is slow, and there is always pressure loss. The positive flow control system has higher cost. The main controller collects signals such as pilot, main pump and engine. The feedback speed is faster, and it has certain advantages in control accuracy, fuel consumption and coordination. The system upgrade is also more convenient. Based on the comprehensive advantages and disadvantages, the R&D team of the FR480E excavator decided to adopt a more popular positive flow control system on the aircraft. The self-developed variable-pressure patented technology establishes back pressure only when the slewing motor brake and walking signals are detected, thereby achieving more energy saving. The machine has a total of 17 sensors, realizing real-time monitoring of hydraulic pressure, oil temperature, water temperature, engine speed, oil level and other information. Japan's Kawasaki and the independently developed Woodward two electronic control systems are perfectly matched with the hydraulic system to achieve coordinated matching of the engine and the main pump. Another key technology needs to be specifically pointed out, that is, the FR480E excavator hydraulic oil uses a self-developed independent cooling circuit. At present, most of the excavator hydraulic system cooling system in the domestic market is not completely independent. The system oil returning part goes to the hydraulic oil independent radiator, and some of them directly return to the hydraulic oil tank. The LOVOL independent cooling circuit returns all the oil directly back to the hydraulic tank, and then the hydraulic oil is delivered to the independent radiator through the vane pump installed at the PTO port of the main pump, and then flows back to the tank. The independent radiator motor is electromagnetic proportional. According to the monitored hydraulic oil temperature, the independent radiator fan can be steplessly changed, which can accurately control the hydraulic oil temperature. This working cycle is perfectly combined with variable back pressure technology. Thereby reducing the impact of the oil return system, reducing power loss, thereby reducing fuel consumption. It can also effectively extend the life of the hydraulic oil radiator and prevent the tube from bursting. In order to ensure the cleanliness of the hydraulic system, a return line filter is installed in the oil drain circuit of the hydraulic component and the return line of the breaker. Safe and reliable The Cummins EFI engine used in the FR480E excavator is fully powered and has a power of up to 250 kW, meeting the national emission standards. The quality of domestic diesel oil is different. In order to ensure that the engine can suck in cleaner fuel, the fuel system of the machine adopts a 4-stage filtration system, which is a first-stage oil-water separation plus three-stage diesel filtration. In order to improve the plateau adaptability of the aircraft, the designer carefully adjusted the power of the engine, even in the plateau at an altitude of 4000m, the machine can still operate normally. The machine adopts high-strength wear-resistant materials in the four-wheel belt, which has better wear-resisting performance. The use of a reinforced slewing ring reduces the stress on the running frame. The number of roller wheels has increased from 7 to 8, which not only improves the carrying capacity of the chassis, but also extends the service life of the roller. The structural members such as the arm and the arm are made of Q345B steel with higher strength, and the designer optimizes the structure of the boom and the stick. The boom and the arm are all tested with a reliability of 6000 to 7000 hours, thereby minimizing the risk of cracking of the boom and the arm under severe working conditions. The bottom reinforcement plate is made of NM450 wear-resistant material, and the service life is extended by more than 300h. Comfortable and convenient In the operation of the excavator, the impact of the stick recovery is large, and in order to reduce such an impact, a cushion valve is usually provided in the arm circuit of the excavator. The stick buffer valve used by the general excavator manufacturer is one-way. Although the valve can play a certain buffering role when the stick is retracted, the buffer function will cause the action to lag when the stick is extended in the reverse direction. phenomenon. The stick buffer valve used in the FR480E excavator has a release function, and the buffer function can be released when the stick is extended. The use of the buffer valve ensures that the reverse action does not lag under the premise of ensuring normal forward buffering, so that the driver's manipulation is more coordinated and the comfort is greatly improved. The cabs of the previous Levo series excavators use secondary damping. The cab of the FR480E excavator uses a three-stage damping with better damping and softer vibration, which greatly reduces the driver's labor intensity. The cab seat can be placed at 160°, and the driver's rest is more comfortable during the break. The power switch door is provided on the side of the toolbox, and the driver's switching power supply is more convenient. The engine cooling system adopts modular parallel structure, which is easy to disassemble, and the back is equipped with a plug-type dustproof net, which is very convenient to maintain. The engine adopts OBD fault diagnosis technology, and the fault code is directly displayed on the instrument panel, making it easier to diagnose and troubleshoot. The GPS remote control technology can realize the reservation lock machine, which does not affect the user's use and can control the risk. The engine is optionally equipped with an oil bath air pre-filter to ensure that the engine draws in clean air in harsh environments. Another upgrade has been recognized by the majority of users, that is, the maintenance cycle of the FR480E excavator has almost doubled. In the past, the hydraulic oil of the Foton Lovol series excavators was made of domestic hydraulic oil. The hydraulic oil replacement cycle was 2500h, and the diesel filter replacement cycle was 250h. In order to reduce the maintenance cost of the user and reduce the labor intensity of the driver, the FR480E excavator adopts the Japanese long-term hydraulic oil of the Jemaoma X46 with a maintenance period of 5000h, and adopts a diesel filter with a maintenance cycle of 500h. The FR480E excavator is available in 2.1m3, 2.3m3 and 2.5m3 buckets, allowing users to choose according to the working conditions. The hydraulic system is equipped with an attachment interface, which is convenient for users to install hydraulic breakers and other operations. Prosperity: Assistant General Manager of Engineering Machinery Division of Lovol Heavy Industries Group and Deputy General Manager of Japan R&D Center. The FR480E excavator adopts a more popular positive flow control system. The slewing motor adopts HPC high-pressure cutting technology, and the hydraulic oil adopts independent cooling circuit independently developed. The application of these key technologies has greatly reduced the energy loss of the system while ensuring that the machine performs the compound operation intelligently and efficiently. Wang Xiaolong: As a typical representative of the E series, the FR480E large excavator is jointly built by Chinese and foreign experts. It integrates many advanced technologies to meet the national emission standards. At the same time, it has achieved many technological breakthroughs in terms of intelligence, efficiency, safety, reliability and convenience. . Revo excavator FR480E (This article is from Revo Heavy Industries) Galvanized Coil,Hot Dip Galvanized Steel Coil,Dx51D Galvanized Steel Coil,Galvanized Steel Coil Grade Zhonglian Yongsheng Special Steel Co.,Ltd , https://www.zlysssteel.com