(1) Coal Mine Technology Research Gas Generator Group Coal Mine Gas Generator Group is composed of a 12V190 gas engine and generator. The main components of the gas engine are developed and developed based on the 12V190 diesel engine used in raw petroleum mining farm machinery, and are also drawn from other gas engine technologies successfully developed by Ding Company in the early stage. The key innovations of the project are: the use of electronically controlled hybrid technology, gas and air mixing and then boosting technology, pre-combustion chamber technology and full electronic control technology. According to the characteristics of flammable and explosive gas in coal mines, from a safety perspective, gas fire arresters are adopted. The failure of the unit itself threatens the gas extraction and discharge system of the entire coal mine. (II) Research on gas conveying technology for coal mines with a methane concentration of 25%, according to coal mine safety production regulations, gas conveying dry and water sealed fire arrester technology is adopted and combined with fine water mist conveying technology. Low

1. What are the conditions for paralleling two generator sets? What are the conditions for paralleling the machine? Answer: The conditions for paralleling the machine are the same voltage, frequency and phase of the two generators at the moment. Generator sets are commonly known as 'three simultaneous'. It is generally recommended to use a dedicated parallel machine device to complete the parallel machine work. It is generally recommended to use a fully automatic parallel machine. Try not to manually parallel machine. Since the success or failure of manual parallel machine depends on human experience. The author boldly stated with more than 20 years of experience in power work, the reliable success rate of manual parallel machine of diesel generator is 0. The concept of manual convergence of the power supply system of the mains power system must not be used to apply a small power system, because the protection levels of the two are completely different. 2. What are the reasons for the high water temperature alarm and shutdown even if it is unable to use? Answer: Water tank leaks or insufficient water volume; water temperature sensor is damaged; water tank water channel dirt is too thick or too much oil stain; fan belt is worn too much, pressure is insufficient; water pump is worn, insufficient pump water volume is insufficient;

Correct maintenance is an important guarantee to ensure the normal and reliable operation of the diesel engine and extend the service life of the diesel engine. Technical maintenance is divided into the following four categories: 1. Daily technical maintenance. 2. Technical maintenance after working for 125 hours. 3. Technical maintenance after working 500 hours. 4. Technical maintenance after working for 1000 hours. (I) Daily technical maintenance 1. Check whether each instrument is normal. 2. Check the oil level of the oil pan and oil injection pump. 3. Check the amount of oil in the fuel tank and check whether there is any accumulation of scale and moisture in the precipitation cup. It needs to be disassembled clearly. 4. Remove dust adhered to the air filter element, cavity channels, etc. 5. Check for possible water leakage, oil leakage, and air leakage. 6. Check whether the connections in various parts of the diesel engine are firm. 7. Sweep the mud on the surface and keep the diesel engine, especially electrical equipment clean. If you rinse with water, be careful not to let the water enter the diesel from the gear cover ventilation port, dipstick seat hole, and air intake pipe hole.

The Cummins generator set uses Dongfeng Cummins B and C series engines, with advanced technology and reliable performance. It is equipped with Wuxi New Era Stanford generators that withstand the voltage and frequency recovery during instant loading. In addition, the original design of built-in multi-stage vibration damping system can effectively eliminate vibration during unit operation, so that the control system and electrical components are protected; it can also provide very reliable power in extremely harsh environments. Advantages of Cummins generator sets: 1. After several Cummins generator sets are merged, a high-power generator set will supply power to the load. The number of machines can be determined according to the size of the load (the generator set consumes the lowest fuel under the operating conditions of 75% of the rated load), so as to save diesel and reduce the generator composition cost. Especially at present, diesel is relatively tight and oil prices are rising rapidly, saving diesel has become very important. 2. Achieve uninterruptible power supply to ensure normal production of the factory and unit conversion

As we all know, the good performance of the overall performance of diesel generator sets cannot be separated from the effective coordination of various components. Therefore, the daily safe use and maintenance of equipment parts is very important. Today, Haixing Generator Set will introduce to you the common knowledge of battery use and maintenance of diesel generator sets to ensure the normal operation of the equipment. Daily use of battery of diesel generator set: 1. When the battery of the diesel generator set is not in use for a long time, appropriate charging must be given before use to ensure the normal capacity of the battery. Because normal operation and charging will cause some water in the battery to evaporate, this requires us to often add appropriate amounts of distilled water or pure water to the battery, but do not add it too much (using the scale of the battery plate as the standard). Otherwise, when the battery is discharged or charged, the electrolyte inside the diesel engine will surge out from the overflow hole in the filling port, causing corrosion and damage to surrounding objects and the environment.

After the diesel generator set is running for a period of time, sometimes there will be abnormal valve noise. At this time, everyone does not need to panic, but should immediately stop the machine to check, find out the root cause of the abnormal valve noise, and solve it in time to ensure the normal production of the enterprise. Below, Haixing will make a simple analysis on the reasons for abnormal valve noise of diesel generator sets for reference. 1. The valve leakage sounds. The valve leakage sounds outside the valve room, which is more obvious at high load and low speed, and the sound increases with the increase of load. The main reason is that when reaming the valve seat, due to improper operation or excessive wear of the valve conduit, the valve seat is skewed or the valve gap is small, resulting in valve ablation, causing the valve to be closed tightly and leak. Treatment method: Remove the cylinder head, grind the valve, check the valve spring force, and readjust the valve clearance. 2. When the valve knock is running at idle speed, the valve rod is triggered between the tail end and its driving part.

After the diesel generator set is used for a period of time, the fuel injection nozzle may become stuck due to improper operation or maintenance. So, what are the reasons that cause the fuel injector of the diesel generator set to get stuck, and how will it be solved after encountering the problem? Haixing will give you a brief introduction here. 1. The reason for the injector nozzle of the diesel generator set is stuck 1. The diesel is not clean, there are impurities in the high-pressure oil pipe, which causes the needle valve pair to be worn, causing the needle valve pair to be closed tightly, the high-pressure gas in the combustion chamber to rush backwards, and the needle valve pair pair is burned. In addition, the dirt on the injector pressure regulating spring, tappet and other parts are moved to the upper part of the injector needle valve through the injector lift, or the cotton rope and lead wire in the oil circuit to prevent oil leakage enter the injector through the high-pressure oil pipe, which will cause the needle valve pair to be stuck. 2. The outlet valve is worn, causing oil dripping when the injector stops injection, causing the injection nozzle to burn and accumulate carbon, causing the malfunctions such as jamming.

After purchasing a Cummins diesel generator set, customers should pay attention to safe use and strictly abide by operating procedures to ensure the normal operation of the diesel generator set. So, what are the specific operating procedures for Cummins diesel generator sets? Haixing will introduce it to you here. Preparation before starting the machine 1. Check whether the oil level of the diesel engine crankcase is normal and check whether the cooling water tank is cooled (cooling water and engine oil should be enough). 2. Open the diesel valve to clear the fuel pipeline. 3. Manually check whether there are any signs of jammed moving parts. 4. Whether the starting motor current meets the starting requirements. 5. Check whether the water pump, oil pump, and fan conveyor belt are normal. 6. After confirming the above check, start the diesel generator. 2 Start 1. Close the starting power switch and start. 2. Start with diesel generator

If you want to understand the approximate operating costs before purchasing a diesel generator set, it is necessary to calculate the fuel consumption. Many people do not know much about the fuel consumption and calculation of the generator set. The following Haixing Power will give you a detailed answer. Generally speaking, the fuel consumption of diesel generators is related to the following two factors: 1. Fuel consumption rate. Different brands of diesel generators have different fuel consumption rates and different fuel consumption; 2. The size of the electricity load, if the load is larger, the throttle is larger, the fuel consumption will be larger, and the load is smaller, the relative fuel consumption will be smaller. To facilitate everyone to understand the approximate fuel consumption of the generator set, calculate the usage cost of the generator set; this gives some approximate reference values ​​(30kw-500kw). Fuel consumption of 30kw diesel generator set = 6.3 kg (kg) = 7.8 liters (L) 45kw diesel generator set = 9

How to perform shutdown operation after the generator set is run? Just turn off the power supply directly? Hereinafter, Haixing will explain in detail the three operations of diesel generator set operation, normal shutdown, and emergency shutdown, so that everyone can learn from it. After the operating unit enters full speed, the generator voltage and frequency are normal and stable, the operator can open and close the generator. During the unit operation, the operator should also frequently observe whether the unit is operating normally, whether the control screen instrument indicator is in a political position, whether the control screen has pre-alarm indications, fuel tank fuel level and other operating parameters, and record the unit operating parameters regularly. Before the normal shutdown unit is shut down, the load is first separated, and then the unit is run without load for a certain period of time, so that the unit is fully cooled and then shut down. For some units with a shutdown valve installed, if you want to turn off the control screen key switch, use the unit to stop the operation