Cummins generator sets are Haixing’s best-selling units. During the process of contacting customers, the staff actively solved various questions for everyone. Among them, there were many inquiries about the non-circulating coolant of the units. Here, Haixing will help you. Briefly describe the five major causes of coolant failure. Non-circulating coolant is caused by the following reasons: Copyright by: www.hxdlkj.com (1) Cummins generator set radiator fins are clogged or damaged. The cooling fan does not work or the radiator is clogged, the coolant temperature does not drop, and the water tank is rusted and damaged, causing leakage and poor blood circulation. copyright by: www.hxdlkj.com (2) The thermostat of the Cummins generator set is faulty. The engine combustion chamber is equipped for the purpose of thermostatic control of the engine combustion chamber if the thermostat is at the specified temperature (82

1. Generator loss of excitation protection. Loss of excitation protection is used as a loss of excitation fault protection when the generator excitation current drops abnormally or disappears completely. It is composed of criteria such as excitation low voltage Ufd(P), system low voltage, static stable impedance, TV disconnection, etc. whose setting value automatically changes with the active power, and operates in signaling and demagnetization respectively. The excitation low voltage Ufd(P) criterion and the static stability impedance criterion are both related to the static stability boundary and can detect whether the generator loses static stability due to loss of excitation. The static stability impedance criterion operates at the static stability boundary after demagnetization. 2. Generator over-excitation protection Over-excitation protection is a protection that reflects the excessive magnetic density in the core of the generator due to reduced frequency or excessive voltage. The over-excitation protection is divided into high and low settings. The low setting sends a signal and reduces the excitation voltage after a fixed delay of 5 seconds (the function of reducing the excitation voltage and excitation current is not used yet). The high setting acts on the decompression after an inverse time limit. Demagnetization. The upper limit of inverse time delay is 5 seconds and the lower limit is 200 seconds.

One point that has been emphasized many times in the diesel generator starting rules is that the switch must be turned off before starting. Many people expressed doubts about this regulation, and Haixing gave the answer. The main reason for doing this is to prevent the phenomenon of reverse power transmission. What is the reverse power supply phenomenon? What are the consequences of this phenomenon? Copyright by: www.hxdlkj.com Each generator set will be equipped with a load output switch for the customer. Before the generator set is started, the load switch must be Disconnected. Only when there is a power outage and it is detected that there is no current on the grid, the current from the generator set can be transmitted to the grid. At this time, the grid switch must be in the off state, otherwise, when the mains power comes in, , prone to reverse power supply. The situation of self-prepared diesel generators delivering power to the city grid is called reverse power delivery. There are two serious consequences: copyri

Lubricating oil for diesel generator sets has the largest variety of petrochemical products and is widely used. Lubricating oil can protect the unit well and reduce friction.At the same time, lubricating oil is a technology-intensive product.Only by doing a good job in lubricating oil management and using lubricating oil correctly can the technical performance of lubricating oil be exerted, which can ensure the normal operation of equipment, extend the life of equipment, save lubricating oil, save energy, and improve economic and social benefits.Transportation and storage management of lubrication.The transportation and storage requirements of lubricating oil mainly include: (1) Bulk oil products 1. Containers for holding and storing lubricating oil must be clean; 2. Transportation and storage requirements for transformer oil and turbine oil 'special tank lines'; other oils Storage and transportation facilities should be set up according to the three major categories of internal combustion engine oil, hydraulic oil and gear oil.3. Special attention should be paid to preventing the mixing of water and impurities during transportation and storage.4. The storage period of bulk lubricating oil should generally not exceed half a year.

Affected by the use environment, diesel generator sets may encounter varying degrees of collision and water vapor erosion, causing problems such as cracking, wear, and corrosion. How to repair these damages? Haixing provides repair methods for common damage to the body. 1. Freeze crack. This is damage that is prone to occur on diesel engines in winter. Cracks in the body can only be repaired by cold welding in parts that are not stressed. First, drill anti-crack holes at both ends of the crack, then plant a number of iron nails along the crack, and then use several pieces of patching plates perpendicular to the direction of the crack, and use low-carbon steel welding rods to weld firmly along the crack and patching plate. Pay attention to tapping the weld with a small hammer while welding, and then use flame to correct it after all welding. Copyright by: www.hxdlkj.com 2. The 205 bearing holes at the upper and lower balance shaft ends are worn. This situation must be repaired immediately. When the bearing hole is lightly worn, it can be repaired by enlarging the outer diameter of the 205 bearing.

The role of crankcase ventilation: When the engine is working, there is always a part of the combustible mud gas and exhaust gas that escapes into the crankcase through the piston rings. The gasoline vapor that escapes into the crankcase condenses and will thin the engine oil and worsen its performance. The exhaust gas contains water vapor and sulfur dioxide. The water vapor condenses in the engine oil to form foam, damaging the engine oil supply. This phenomenon is especially serious in winter; sulfur dioxide reacts with water to form sulfurous acid, and sulfurous acid forms sulfuric acid when it encounters oxygen in the air. These acidic substances The appearance of oil not only deteriorates the engine oil, but also causes parts to be corroded. As combustible mud gas and exhaust gas escape into the crankcase, the pressure in the crankcase will increase, and the oil will leak out from the crankshaft oil seal, crankcase liner, etc. The oil vapor lost into the atmosphere will increase the pollution of the engine to the atmosphere. The engine crankcase ventilation device can prevent or reduce the above phenomenon. Therefore, the functions of the engine crankcase ventilation device are: 1. Precautions

When the diesel generator set is used indoors, it may be equipped with a special machine room. According to the working status and performance of the generator set, the setting of the machine room also has requirements. Haixing has compiled several principles and matters to share with you: Installation of diesel generator sets The principle of layout of the machine room is to ensure the conditions required for the normal operation of the unit (including diesel engine, generator and control panel), and to facilitate operation, maintenance and maintenance. Users should consider the specific layout plan based on the actual situation of the unit and the specific models used. The following matters should be paid attention to when designing the machine room: Copyright by: www.hxdlkj.com (1) An operating room with sound insulation facilities should be set up next to the power distribution room, and an observation window should be provided to facilitate the operator to grasp the operation of the diesel generator set in a timely manner situation. copyright by：www.hxdlkj.com (2)

Modern diesel engines are increasingly using pressure-increasing technology, which makes the oil collector more powerful, has a more reasonable layout while maintaining the same volume, and greatly saves energy. However, in actual work, many drivers do not know much about the performance, structure, and principles of turbochargers. It is not uncommon for the turbochargers to be damaged in a short period of time, which not only causes large economic losses, but also affects the performance of the diesel engine. Normal use. So, how to use and maintain correctly to extend the service life of the turbocharger? 1. Ensure reliable lubrication of the turbocharger. Use the supercharged diesel engine oil that meets the requirements according to the instructions for use of the turbocharger (generally use CD-level lubricating oil) ), and regularly check the quantity and quality of the engine oil, promptly replace deteriorated or dirty engine oil, clean or replace the oil filter, and ensure a high degree of cleanliness of the engine oil. 2. To ensure a high degree of cleanliness of the intake air of the diesel engine, the intake and exhaust pipelines of the supercharged diesel engine must be maintained

The cylinder of the diesel generator set is a component that is easily corroded and requires more attention during daily operation and maintenance. Here, let’s follow Haixing to understand why cylinders are prone to corrosion and how to effectively avoid such corrosion. copyright by: www.hxdlkj.com The corrosion of diesel generator engine cylinder liner is the damage caused by the electrochemical action of acid substances. When the temperature of the cylinder liner wall is low, the water vapor entering the cylinder will condense into water droplets. These water droplets interact with the combustion gas to generate acids, such as organic acids, sulfuric acid, carbonic acid, etc., which condense on the cylinder wall and corrode the cylinder. Practice has proved that when the cooling water temperature is lower than 65~70℃, or the diesel engine is started frequently at low temperatures, corrosion and wear will increase significantly. Therefore, during use, attention should be paid to controlling the cooling water temperature and minimizing the number of cold starts. copyright