Some friends found that there will be oil leakage on the bonding surface to varying degrees during use of the generator set. Haixing conducted research on this part of the problem and believed that the main reasons are the following points: 1. The quality of the purchased or homemade paper pads does not meet the requirements, such as insufficient thickness, improper storage, wrinkles and deformation, or inadequate cleaning during assembly, and dust and impurities, which are all causes oil leakage. 2. The oil pressure is too high, which can also cause oil leakage on the static joint surface. 3. The quality of the static joint surface itself is mainly determined by the accuracy of the processing equipment itself and storage and transportation conditions. If the equipment is high in accuracy, the flatness and roughness of the static joint surface can meet the design requirements of the drawing, and pay attention to preventing bumps during storage and transportation, so it is not difficult to achieve complete sealing of the static joint surface. However, because the equipment accuracy and process level of some manufacturers are still low, the storage and transportation conditions and management level cannot be completely guaranteed to be free of bumps and scratches. 4. The operation technology is poor during maintenance. Currently, diesel generator sets generally use

During the use of generator sets, customers will have many 'whys'. Today, Haixing has prepared some difficult problems about the unit and will explain them in detail below. More difficult problems will be published on Haixing's official website one after another. Your attention is welcome. 1. What are the conditions for the use of two generator sets in parallel? What device is used to complete the parallel work? Answer: The conditions for parallel machine use are that the voltage, frequency and phase of the two machines are the same instantaneously. Commonly known as 'three simultaneous' means that the parallel machine is completed with a dedicated parallel machine device. It is generally recommended to use fully automatic merging cabinets, and try not to manually merging the machine, because the success or failure of manual merging depends on human experience. The reliable success rate of manual merging of diesel generators is equal to 0. 2. What is the power factor of a three-phase generator? Can a power compensator be added to improve power factors? Answer: The power factor is 0.8. No, because charging and discharging of the capacitor will cause small power supply fluctuations. and unit vibration

There are many brands of generator sets on the market. Whether for naturally aspirated or supercharged unit users, manufacturers emphasize that low-load/no-load running time should be minimized as much as possible, and stipulate that the minimum load should not be less than 25%-30% of the unit's rated power. Next, Haixing will tell you the principle.

Some friends do not choose the right equipment in the selection of generator sets, or have minor shortcomings in operation, or lack of daily maintenance, which will pose safety hazards to the generator set. Today, Haixing is going to talk to you about the reasons for the generator set fire. (1) Overload generator sets will be overloaded, too low voltage, and excessive iron loss of three-phase asynchronous generator sets. (2) Short circuit generator sets are divided into inter-turn short circuit, inter-phase short circuit and ground short circuit. (3) If the contact points or lead wire contacts of the poor contact coil are loose, the contact resistance will increase. (4) Improper selection of generator sets of different protective forms should be selected in different places, otherwise a fire will occur. (V) Single-phase operation three-phase asynchronous generator set continues to operate when one phase is not powered on, and then the other two phases will flow through a single-phase current. This state is called single-phase operation. (VI) Mechanical friction generator

During the process of contacting customers, Haixing's staff found that many customers were very vague about how to accurately order generator sets. Today, Haixing will teach you what matters to pay special attention to when ordering generator sets: The order of generator sets should generally indicate the following content: (1) The unit model, rated power, rated frequency, rated voltage, rated current, phase number, power factors and wiring methods, etc. (2) Requirements for unit automation functions and performance. (3) Requirements for the structure, performance and installation size of diesel engines, generators and control screens. (4) Requirements for parallel operation of units: Purchase multiple units at the same time. Whether it is required to be parallelized. If it is required to be parallelized, it should also be proposed whether it is necessary to provide measurement instruments and devices required in parallel. (5) Requirements for the unit's auxiliary equipment: Many manufacturers cool down

Many customers do not understand the carbon deposit phenomenon of generator sets, and do not know how to deal with such a situation. Now Haixing will explain in detail several common reasons for carbon deposits in generator sets. Carbon deposits in the generator set are actually the product of incomplete combustion of diesel and oil that penetrates the combustion chamber. It is a common phenomenon to produce carbon deposits on the top of the diesel engine piston, the combustion chamber wall and around the valve. A large amount of carbon deposit will have a certain impact on the performance of the diesel generator set, causing poor combustion, deterioration of heat transfer and reducing the reliability of the fuel injector operation. Several common causes of carbon deposits are: 1. The fuel injector is not working properly, such as poor atomization, oil dripping, diesel generator injection pressure is too high or too low, as well as early or too late, and excessive fuel injection volume will cause some fuel to burn incompletely. 2. The engine oil is severe. 3. Severe air leakage. 4. The cooling water temperature is too low

Torque torque The torque output from the generator set flywheel is called effective torque, referred to as torque, and is unity in Nm (Nm) or kilogram force meter (kgf.m). It refers to the heat generated by the combustion of fuel after mixing with air in the cylinder, causing the gas to expand and perform work, overcome the friction resistance torque of each part and the torque consumed by driving auxiliary devices (such as fuel injection pumps, cooling water pumps, lighting generators, etc.), and finally passes through the crankshaft to the flywheel to provide the torque used. The force required by the generator set to drive the diesel engine chassis and towing the farm tools is transmitted to the flywheel, which becomes the counter torque that hinders the rotation of the flywheel, which is usually called the load of the diesel engine. In actual work, the torque transmitted from the flywheel of the generator set should be equal to the load of the diesel engine. The vibration isolation structure diesel generator set adopts a welded base structure and is made of cold welding with high-quality medium-thick steel plates and boiler steel plates.

According to reports, French energy group EDF plans to test four tidal generator sets with a total capacity of 2MW installed near Brea on the 31st. According to the EDF, the total investment of the project is nearly 40 million euros, and the company will receive subsidies provided by the EU and French environmental and energy agency Ademe. The company OpenHydro is responsible for designing the turbine units, while the French shipbuilding company DCNS is responsible for assembling the equipment. A wheel generator is a new generator set that takes power from the ocean current. The energy generated by the tidal turbine will be converted through a set of rectifiers and transported to the mainland via underwater cables. The project will be prepared to be implemented. Local authorities will fully support this kind of research and development and implementation. What is a tidal generator set? Tide power generation is to build a water barrier dam in a bay or tidal estuary to form a reservoir, and place a water turbine generator set in or next to the dam, which uses the rise and fall of the sea water level during the tide to make the sea water.

First, Haixing will introduce to you what cave erosion is. Cavitation refers to the surface where the outer wall of the wet cylinder liner of the diesel engine and the coolant contact is destroyed into some needle-shaped holes. These holes gradually expand and deepen, and finally form deep holes or cracks; the holes are generally very clean and have no corrosion products. Haixing summarizes that people generally believe that cave erosion is caused by high-frequency vibration of the cylinder liner. Mechanical vibration causes changes in the cooling fluid pressure, causing bubbles to occur in the cooling fluid and breakage. This process is the cause of cave erosion. Since there is gas dissolved in the coolant, when the high-frequency vibration of the cylinder causes the local pressure of the coolant to drop to a certain critical value, the gas dissolved in the coolant is separated in the form of bubbles. These bubbles flow to the high-pressure zone and collapse occurs when the pressure exceeds the bubble pressure. The gas in the bubble state is reliquefied or dissolved in the coolant, and the volume suddenly decreases, and the coolant moves at high speed toward the center of the bubble, causing a water hit.

If the fuel injection pump of the generator set is supplied too much, it will increase fuel consumption, and it will easily lead to incomplete combustion, causing wear of the cylinder, piston and piston ring, and even causing the diesel engine to overheat and knock the cylinder. To determine the oil supply, you can open the side cover of the fuel injection pump for detailed inspection based on the smoke exhaust situation. According to previous maintenance and treatment experience, Haixing summarizes the reasons for excessive oil supply of the fuel injection pump as follows: ① Adjust the fuel injection pump plunger to make the oil supply too large, or the lock screw of the adjustment ring is loose, causing the adjustment teeth to shift, resulting in excessive oil supply of the fuel injection pump. ② Adjust the adjustment screw that limits the maximum oil volume of rack in the adjuster is too large or the throttle handle limit screw is too large. ③The excessive oil in the speed controller will increase the fuel supply and lead to 'speed'. In addition, you should also pay attention to the unstable working of the diesel generator set, the power drop, and the exhaust gas caused by uneven oil supply during use.