The hot summer is coming. In addition to preventing heat and cooling by staff, Haixing reminds everyone that generator set equipment should also have necessary cooling operations to prevent the unit from burning out at high temperatures. The specific operating points are as follows: copyright by: www.hxdlkj.com1. The circulating cooling water in the water tank should be kept sufficient so that the generator set can dissipate heat to the maximum extent during operation. 2. When using the diesel unit, it should be placed in a dry outdoor area or a well-ventilated place in the computer room to allow air circulation. 3. It is prohibited to place flammable and explosive items near the diesel unit to avoid posing safety hazards. 4. Be careful not to run the diesel unit for a long time. The unit should be suspended every 5 hours to avoid wear caused by running in high temperature environments. copyright by: www.hxdlkj.com In summer production operation only

Cummins generator set is a hot-selling unit of Haixing. During the contact with customers, the staff actively solved various questions for everyone. Among them, there have been many consultations on the non-circulating coolant problems of the unit. Here, Haixing will briefly tell you the five major reasons for the non-circulating coolant. The following reasons cause the non-circulating coolant: copyright by: www.hxdlkj.com (1) The radiator fin of the Cummins generator set is blocked or damaged. The cooling fan is not working or the radiator is blocked, the coolant temperature does not pull down, the sink is rusted and damaged, causing leakage, and may also lead to poor blood circulation. copyright by: www.hxdlkj.com (2) The automatic thermostat of the Cummins generator set is faulty. The engine combustion chamber is equipped with a constant temperature control engine combustion chamber for the purpose, if the thermostat is at the specified temperature (82

1. Generator demagnetization protection Demagnetization protection acts as a demagnetization fault protection for abnormal drop or completely disappearing of the generator excitation current. It consists of criterion such as excitation low voltage Ufd(P), system low voltage, steady impedance, TV line disconnection and other criteria, and is respectively used to signal and de-column demagnetization. The excitation low voltage Ufd(P) criterion and the steady impedance criterion are both related to the steady boundary, which can detect whether the generator loses static stability due to loss of magnetism. Static impedance criteria act when the static boundary is demagnetized. 2. Generator overexcitation protection Overexcitation protection is a protection that reacts to the excessive magnetic density of the core due to the decrease in frequency or the excessive voltage of the generator. Overexcitation protection is divided into two fixed values, high and low. The low fixed value sends a signal and reduces the excitation voltage after a fixed delay of 5 seconds (the function of reducing excitation voltage and excitation current is not used yet), and the high fixed value acts in de-column de-magnetization after the reverse time limit. The upper limit of the inverse time limit is 5 seconds, and the lower limit is 200 seconds.

One thing that has been emphasized in the starting rules of diesel generator sets has been many times, that is, you must turn off the switch before starting. Many people expressed doubts about this regulation, and Haixing gave an answer. The main reason for doing this is to prevent the phenomenon of reverse power transmission. What is the phenomenon of reverse power transmission? What are the consequences of this phenomenon? copyright by: www.hxdlkj.com Each generator set will configure a load output switch for the customer. When the generator set starts, the load switch must be disconnected. Only when the main power is out of power and it is checked that there is no current on the power grid can the current of the generator set be sent to the power grid. At this time, it is necessary to ensure that the power grid switch is in an off state. Otherwise, when the main power is in power, it is easy to reverse power transmission. The situation where the self-produced diesel generator sends power to the municipal network is called reverse power transmission. There are two serious consequences: copyright

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.

Due to the influence of the use environment, diesel generator sets may encounter different degrees of collision and water and gas erosion, causing cracking, wear and corrosion. How to repair these damages? Haixing provides a way to repair common damage to concentrated bodies. 1. Frozen crack. This is a damage that diesel engines are prone to in winter. Cracks that appear on the body can only be repaired by cold welding when they are not subjected to stress. First, cut the crack-resting holes at both ends of the crack, then plant several iron nails along the crack, then patch a few pieces perpendicular to the direction of the crack, and use low-carbon steel welding rods to weld them firmly along the crack and patch. Pay attention to tapping the weld with a small hammer while welding. After all, use flame correction.copyright by: www.hxdlkj.com 2. The bearing holes at the upper and lower balance shaft ends are worn. This situation must be repaired immediately. When the bearing hole is worn lightly, it can be repaired by the enlarged 205 bearing outer circle method, outside the bearing

When the crankcase ventilation is immersed in the idea of ​​making plans, there is always a part of combustible gas and exhaust gas that rush into the crankcase through the piston ring. After the gasoline vapor that rushes into the crankcase will condense, the engine oil will become thinner and the function will become deteriorated. The waste gas contains water vapor and sulfur dioxide. The water vapor condenses in the engine oil to form foam, which damages the oil supply. This phenomenon is particularly serious in winter; sulfur dioxide meets water to produce sulfuric acid, and sulfuric acid touches oxygen in the air to produce sulfuric acid. The appearance of these acidic substances not only deteriorates the engine oil, but also causes the parts to be eroded. Because combustible and muddy gas and exhaust gas flow into the crankcase, the pressure in the crankcase will increase, and the engine oil will seep out from the crankshaft oil seal, crankcase liner, etc. and disappear. The oil vapor that is missing into the large air will add to the pollution of the large air. The above phenomena can be prohibited or alleviated by the installation of crankcase ventilation and assembly. Therefore, the immersion of crankcase ventilation and assembly is: 1. Beware of the following conditions

When using the diesel generator set indoors, it may be equipped with a special computer room. According to the working status and performance of the generator set, the computer room setting is also required. Haixing has compiled several principles and matters to share with you: The principle of the computer room layout for installing a diesel generator set is: to ensure the normal working conditions of the unit (including diesel engines, generators and control screens) and facilitate use, operation and maintenance. The specific layout plan users should consider it based on the actual situation of the unit and the specific model used. The following matters should be paid attention to when designing the computer room: copyright by: www.hxdlkj.com (1) An operating room with sound insulation facilities should be set up next to the distribution room, and an observation window should be set up to facilitate operators to grasp the operating status of the diesel generator set in a timely manner. copyright by: www.hxdlkj.com (2)

Modern diesel engines are increasingly using pressure-increasing technology, making the oil collector more powerful, and the layout is more reasonable while the volume remains unchanged, while greatly saving energy. However, in actual work, many drivers do not know much about the performance, structure and principles of turbochargers, and the phenomenon of damage to superchargers in a short period of time is common, which not only causes great economic losses, but also affects the normal use of diesel engines. So, how to use and maintain correctly to extend the service life of the turbocharger? 1. Ensure the reliable lubrication of the turbocharger. Use supercharged diesel engine oil that meets the requirements according to the supercharger's instruction manual (usually CD-grade lubricating engine oil) and regularly check the quantity and quality of the engine oil, replace deteriorated or too dirty engine oil in a timely manner, clean or replace the engine oil filter to ensure the high cleanliness of the engine oil. 2. Ensure the height of the diesel engine intake and exhaust pipes must be maintained.

The cylinder of a diesel generator set is a component that is easily corroded, and everyone needs to pay more attention to it in daily operation and maintenance. Here, please follow Haixing to learn why the cylinders are prone to corrosion and how to effectively avoid such corrosion. copyright by: www.hxdlkj.com The corrosion of the cylinder liner of the diesel generator set is the damage of the electrochemical action of acid substances. When the wall temperature of the cylinder liner is low, the water vapor entering the cylinder will condense into water droplets. These water droplets interact with combustion gases to form acids, such as organic acids, sulfuric acid, carbonic acid, etc., which condense on the cylinder wall to corrode the cylinder. Practice has proved that when the cooling water temperature is lower than 65-70℃, or the diesel engine starts frequently at low temperatures, corrosion and wear will increase significantly. Therefore, during use, pay attention to the control of the cooling water temperature and try to minimize the number of times the cold car starts. copyright