Monthly Archives: March 2025

　　When marine diesel generator sets drain water tanks in winter, the following key points should be paid attention to. For example, pay attention to the time of water discharge, matters needing attention in water discharge operation and so on. I hope the following introduction can bring reference to users.Hope for the future marine generator It can achieve rapid and stable development and serve social development and people’s needs well. https://usrpower.com/product-category/marine-generators/pmg-yacht-generator/

　　First, the timing of discharging water from the water tank of marine diesel generator set

　　Stop and wait: drain water 15 minutes after the stop, at which time the water temperature has dropped, avoiding the excessive temperature difference between the fuselage and the external environment caused by immediate water discharge, which will cause deformation of parts, such as cylinder head, and affect the performance of the unit.

　　Avoid draining water at high temperature: Before the engine is turned off, if the temperature is very high, don’t stop immediately to drain water. Unload the load first, make it run at idle speed, and then drain the water when the water temperature drops to 40~50≧. This can prevent the outer surface temperature of the cylinder block, cylinder head and water jacket which are in contact with water from suddenly dropping and shrinking, while the temperature inside the cylinder block is still very high and the shrinkage is small, so it is easy to cause cracks in the cylinder block and cylinder head due to excessive temperature difference between inside and outside.

　　Second, the marine diesel generator water tank water operation

　　Observe the water flow: open the drain valve or switch and pay attention to the specific situation of the water flow. If the water flow is smooth and continuous, it means that the water in the cooling system can be discharged normally. If the water flow becomes smaller or faster or slower, it means that the water contains impurities or scale, which may hinder the normal discharge of water. At this time, the water drain valve or related components should be removed, so that water can be directly discharged from the body. If the water flow is still not smooth, it can be dredged by hard and slender rigid objects such as iron wire until the water flow is smooth.

　　Rocking unit: When the cooling water stops flowing out, the diesel generator set is rocked for a few more turns, so that the residual cooling water that is not easy to flow out will flow out because of the vibration of the marine diesel generator set. This can prevent the water plug on the cylinder head from freezing, thus preventing the cooling water from flowing into the oil shell in the future.

　　Keep the water drain switch in the state: if the water drain switch is not removed, make sure it is in the open state after the water drain is completed, so as to prevent the cooling water that cannot flow out for various reasons from freezing the relevant components of the diesel generator set.

　　Open the water tank cover: open the water tank cover when discharging water, otherwise the cooling water will not flow smoothly, and parts may be frozen due to unclean water discharge in winter.

　　Third, the follow-up treatment

　　Idle drying: In the cold winter, the engine should be started to idle for a few minutes after the cooling water in the engine is released. This is mainly due to the fact that some water may remain in the water pump and other parts after water is drained. After restarting, the residual water in the water pump and other parts can be dried by the body temperature to ensure that there is no water in the engine and prevent water leakage caused by freezing of the water pump and tearing of the water seal.

　　Four, marine diesel generator water tank other maintenance suggestions

　　Maintenance of water tank: the water tank of marine diesel generator set uses pure water, and the radiator is cleaned regularly to prevent internal scaling or deposits from affecting the heat dissipation effect.

　　Preheating measures: when the temperature is low, the marine diesel generator set should be preheated before starting to ensure the smooth start and stable operation of the unit.

　　To sum up, the marine diesel generator set needs to follow certain steps and precautions when draining the water tank in winter, so as to ensure that the water in the cooling system can be completely drained and prevent the related components from being damaged.

　　The daily maintenance of marine diesel generator set is the key to ensure its stable operation. The following are some precautions for routine maintenance:pass yacht generator As can be seen from its market performance, it has strong vitality and strong appeal. https://usrpower.com/product/usr-pmg-marine-generator-jec80-power-8kva/

　　I. General Maintenance of Marine Diesel Generator Set

　　Clean environment:

　　Ensure that there is no water, oil, dirt and corrosive gas near the marine diesel generator set, so as not to damage the insulation of the generator winding.

　　Always clean the dust and dirt in the ventilation duct and keep it unobstructed to ensure the normal ventilation and cooling of the generator.

　　Moisture and dust prevention:

　　Prevent the temperature of cooling air from being too low, so as to avoid condensation of water droplets on windings and other conductive devices.

　　While preventing moisture and dust, be careful not to affect the normal ventilation and cooling of the generator.

　　Rust prevention treatment:

　　If the machined surface of marine diesel generator sets is rusted due to paint peeling, it should be derusted in time and coated with antirust paint.

　　Second, the marine diesel generator set disassembly and inspection

　　Precautions for disassembly:

　　The disassembly and assembly method of marine diesel generator set is basically the same as that of asynchronous motor, but due to the heavy weight of generator, attention should be paid to avoid collision during disassembly and assembly.

　　When removing the end cover, be careful not to damage the stator coil protruding from the base; When taking out the rotor, put cardboard between the stator and rotor of the motor to prevent damage to the core and winding.

　　When binding the rotor with steel cable, the steel cable shall not touch the rotor journal, slip ring and transfer lead.

　　Regular inspection:

　　Check the inside of the generator carefully to ensure that there are no sundries and prevent them from falling into foreign bodies such as screws, tools and rags.

　　Check the lubrication of generator bearings, and the quality and quantity of lubricating oil and grease should meet the requirements of maintenance.

　　Check whether the connection between marine diesel generator set and its prime mover is good, and check whether the axes of the two engines are on the same straight line.

　　Check whether the rotor is flexible and the bearing quality.

　　Iii. Insulation and Drying of Marine Diesel Generator Sets

　　Insulation resistance measurement:

　　Measure the insulation resistance of the generator every three months, including stator and rotor.

　　In order to prevent the measured voltage from damaging the rectifier or other semiconductor equipment, the anode and cathode of the rectifier diode should be temporarily shorted, and the terminal of the electronic circuit board (such as AVR board) should be temporarily removed.

　　Use a 500V megohmmeter to measure the insulation resistance, which should be no less than 0.5MΩ.

　　Generator drying:

　　Newly installed synchronous generators should generally be dried before operation.

　　If the insulation resistance meets the requirements, drying is not required.

　　When the generator in operation is stopped for maintenance or stopped for more than the specified limit, and the insulation resistance is lower than the specified value, it must be dried.

　　Drying methods include hot air method, short-circuit current drying method and loading drying method.

　　Four, marine diesel generator operation monitoring

　　Temperature monitoring:

　　Monitor the temperature of each part of marine diesel generator set, including generator temperature rise and bearing temperature.

　　Excessive generator temperature will accelerate the aging of insulation materials and shorten the service life of generators.

　　For generators in the form of sliding bearings, the allowable bearing temperature is 70≧; For generators in the form of rolling bearings, the allowable bearing temperature is 80≧.

　　Voltage and power factor monitoring:

　　The generator voltage in operation should reach the rated value.

　　Monitor power factor and grid frequency to ensure normal operation of alternator.

　　To sum up, the daily maintenance of marine diesel generator sets involves many aspects, including general maintenance, disassembly and inspection, insulation and drying, and operation monitoring. By carrying out these maintenance work regularly, the stable operation of the generator set can be ensured and the service time can be prolonged.

　　The main factors affecting the price of marine diesel generators include the following aspects:more importantly, boat generator Made a fighter in the product, not afraid of any competitor’s attack. https://usrpower.com/product/usr-pgm-marine-generator-jec60-6kva/

　　Power affects the price of marine diesel generator: the power of marine diesel generator is one of the main factors that determine its price. Generally speaking, the higher the power, the higher the price. This is because high-power units need more fuel and more powerful engines to drive, and also need good materials and manufacturing technology to ensure the stability and reliability of the units.

　　Brand difference: brand is also an important factor affecting the price of marine diesel generators. Brands usually have better reputation, good technology and good service, so their products are usually more expensive. However, when choosing a unit, consumers should not only look at the brand, but also consider the actual demand, budget and cost performance.

　　Configuration level affects the price of marine diesel generator: the configuration of marine diesel generator will also affect its price. Some units are equipped with additional configurations such as automatic control system, remote monitoring system and mute device, which will increase the price of the unit. At the same time, different levels of generators and engines will also affect the price of the unit.

　　Manufacturing technology: The choice of manufacturing technology and materials will also affect the price of marine diesel generators. Some units have adopted good manufacturing technologies and materials, such as digital control technology and combustion technology. The application of these technologies can improve the efficiency, stability and reliability of the units, but it will also increase the manufacturing cost and price of the units.

　　Market demand: Market demand will also affect the price of marine diesel generators. When the market demand increases, the price may rise; On the contrary, when the market demand decreases, the price may fall. For example, during the high temperature period in summer, the electricity consumption will increase obviously, and the demand for marine diesel generators will also increase accordingly, which may lead to the price increase.

　　To sum up, the price of marine diesel generators is influenced by many factors, and consumers should consider them comprehensively according to their own needs, budget and cost performance when purchasing. At the same time, we also need to pay attention to the market price fluctuation and the price difference between different suppliers, so as to make more informed purchase decisions.

　　The main factors affecting the price of marine diesel generators include the following aspects. I hope the following introduction can bring reference to users.From the demand side, yacht generator More in line with the psychological expectations of consumers, willing to pay for the things they like. https://usrpower.com/product/usr-pmg-marine-generator-jec80-power-8kva/

　　First, the brand affects the price of marine diesel generators

　　Brand is one of the key factors affecting the price of marine diesel generators. By virtue of its technology, manufacturing process and good market reputation, brand-name generator sets have good quality and stable performance, so the price is relatively high. On the contrary, some minority brands may have lower prices, but there may be a certain gap in quality and performance.

　　Second, the power affects the price of marine diesel generators

　　Power is another important factor that determines the price of marine diesel generators. Under the same brand and specification, the higher the power, the higher the manufacturing cost and technical requirements, so the higher the price. At the same time, different power units are suitable for ships of different sizes and different electricity demand, so choosing the appropriate power is also the key to control the cost.

　　Third, the configuration affects the price of marine diesel generators

　　The configuration of marine diesel generator will also affect its price. In addition to the standard configuration, there are some optional accessories, such as sound insulation box, rain shelter, mobile trailer, automatic control system and so on. The increase of these configurations will improve the performance and experience of the unit, but it will also increase the cost accordingly. Therefore, when choosing the configuration, we need to make a trade-off according to the actual needs.

　　Fourth, raw material prices

　　The price of raw materials is also one of the important factors that affect the cost of marine diesel generators. The price fluctuation of raw materials such as steel and copper will directly affect the manufacturing cost of generator sets, and then affect their market prices. Therefore, it is necessary to pay attention to the dynamics of the raw material market and its impact on the price when purchasing.

　　V. Seasonal demand

　　Seasonal demand will also affect the price of marine diesel generators. In the peak demand season, due to tight market supply, prices may rise; In the off-season, due to fierce market competition, prices may fall. Therefore, it is necessary to pay attention to the changes in market demand and its impact on prices when purchasing.

　　To sum up, the price of marine diesel generators is influenced by many factors such as brand, power, configuration, raw material price and seasonal demand. When purchasing, we need to weigh and choose according to the actual demand in order to find a product with high cost performance.

　　When selecting the manufacturer of marine generator set, the following key matters need to be considered to ensure that the generator set with good quality meets the demand. I hope the following introduction can bring reference to users.Before that, marine generator The market has also soared for a time, which has attracted the attention of a wide range of investors. https://usrpower.com/product-category/marine-generators/pmg-yacht-generator/

　　First, the brand and configuration of marine generator set manufacturers

　　Brand selection: choose brands with good reputation, which usually have more mature technology and better after-sales service system.

　　Configuration requirements: according to the power demand of the ship, select the appropriate generator set configuration, including power, voltage, current and other parameters, to ensure that the generator set can meet the normal operation and emergency needs of the ship.

　　Second, the quality and performance of marine generator set manufacturers’ products

　　Quality inspection: check the shell, internal components and wiring of the generator set to ensure that there are no obvious defects and damage. At the same time, we should pay attention to the production technology and material selection of the generator set to ensure its sufficient durability and reliability.

　　Performance test: Before purchasing, the manufacturer can be required to provide the performance test report of the generator set or conduct on-site test to verify whether its performance meets the requirements. Special attention should be paid to the starting performance, operation stability and load capacity of generator sets.

　　Third, after-sales service of marine generator set manufacturers

　　Service network: Understand whether the after-sales service network of marine generator set manufacturers is perfect, including the distribution of after-sales service points, the number and quality of service personnel, etc. Ensure that professional maintenance and support can be obtained in time when the generator set fails.

　　Warranty policy: Ask about the warranty policy provided by the manufacturer, including the warranty period and scope. Give priority to manufacturers who provide long-term warranty and comprehensive warranty services to reduce the later maintenance costs.

　　Fourth, the product price and cost performance of marine generator manufacturers

　　Price comparison: Before purchasing, we can compare the prices of different brands and models of generator sets to understand the market price level and pricing strategies of different manufacturers.

　　Cost-effectiveness evaluation: comprehensively consider the quality, performance, after-sales service and price of the generator set, and evaluate its cost-effectiveness. Choosing a cost-effective generator set can not only meet the power demand of ships, but also reduce the procurement cost.

　　V. Strength and reputation of marine generator set manufacturers

　　Manufacturer scale: Understand the production scale, number of employees and R&D investment of the manufacturer to judge its production capacity and R&D strength.

　　Credibility inquiry: You can know the credibility of the manufacturer through online inquiry and customer evaluation. Give priority to manufacturers with high credibility and good customer evaluation.

　　Six, other matters needing attention

　　Understand product certification: ensure that the selected generator sets meet the relevant standards and certification requirements of the country or industry.

　　Considering the demand: If the ship has special electricity demand or space limitation, it can communicate with the manufacturer for production to meet the actual demand.

　　To sum up, when choosing a marine generator set manufacturer, we need to comprehensively consider the brand and configuration, quality and performance, after-sales service, price and cost performance, strength and reputation of the manufacturer and other matters needing attention. Through a comprehensive evaluation of these factors, we can buy a generator set with good quality and meet the demand, which will provide a strong guarantee for the normal operation of the ship.

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모모FR-4 is a grade for flame-retardant fiberglass reinforced epoxy material. Therefore, FR-4 PCBs offer a higher level of heat resistance compared to standard PCBs. The FR-4 board is classified into three categories based on the number of copper trace layers:

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모모Typical Application Areas

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　　Schematic Diagram (Preferred format: DSN or SCH)Doing these simple things can also make RF PCB Sowing high-quality genes will eventually grow into towering trees and become the leader in the industry. https://www.wellcircuits.com/

　　Schematic Diagram

　　Structure Diagram (Preferred format: DXF or DWG)

　　Structure Diagram

　　Component Datasheet (Include component dimension drawing; this is essential for packaging)

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　　Special Requirements (Any specific details or concerns to be aware of)

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　　V-cut example 1

　　V-cut Example 1

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　　V-cut Example 2

　　V-cut example 3

　　V-cut Example 3

　　V-Cut Machine

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