Monthly Archives: February 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.know boat generator The market will definitely bring great influence to the whole industry. https://usrpower.com/product/usr-pgm-marine-generator-jec60-6kva/

　　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.

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According to CCTV news, on May 23 local time, Russian President Vladimir Putin signed a presidential order requiring the Russian government to formulate relevant rules to compensate Russia and the Russian central bank for losses caused by the unfriendly measures of the United States, and to allow the use of U.S. assets in Russia. Domestic assets are used to compensate for losses caused by the confiscation of Russian assets in the United States.

The presidential order also involves allowing property owners in Russia to file lawsuits against the United States for illegally confiscating Russian assets in the United States in accordance with Russian law. In addition, the presidential decree also requires Russian courts and government departments to send to the Russian Government’s Foreign Investment Regulatory Commission the specific information on the inventory of the assets of U.S. legal persons and individuals in Russia after receiving relevant compensation requests, and use this as a basis for compensation work.

Related reports:

EU countries will use profits from freezing Russian assets to aid Ukraine

According to a Reuters report on May 21, the Belgian government revealed on the 21st that EU countries have formally adopted a plan to use profits generated by the assets of the Russian central bank frozen by the EU for defense assistance to Ukraine.

Under the EU agreement, 90% of the proceeds from frozen Russian central bank assets will go into a fund operated by the EU to provide military assistance to Ukraine, while the remaining 10% will support Ukraine through other means.

According to reports, ambassadors from EU countries reached a consensus on this matter at the beginning of this month, and the text of the agreement can officially take effect only if the ministers of various countries are stamped and approved.

Frozen assets of Russia’s central bank are reportedly generating huge profits. The EU expects to generate profits of about 15 billion to 20 billion euros by 2027. EU diplomats said Ukraine is expected to receive its first payment in July this year.

A senior Russian diplomat warned that the plan would have unpredictable consequences and said sooner or later the EU would have to return what was stolen to Russia.

Ukraine Foreign Minister Kuleba thanked the EU for the above decision on the 21st, but reiterated that Ukraine’s ultimate goal is to confiscate Russia’s financial assets, not just to benefit from profits.

According to reports, shortly after the Russia-Ukraine conflict broke out in February 2022, the Group of Seven (G7) froze Russian financial assets worth approximately US$300 billion. Since then, the EU and other G7 countries have debated how and whether to use the funds to help Ukraine.

　　The daily maintenance and management of ship-borne generator is the key to ensure its stable operation and prolong its service time. The following are some key maintenance management issues:We have every reason to believe. boat generator It will become the mainstream of the industry and will gradually affect more and more people. https://usrpower.com/product/usr-pgm-marine-generator-jec60-6kva/

　　I. General Maintenance of Ship-borne Generator

　　Keep clean:

　　Always clean the dust and dirt near the generator to avoid the accumulation of water, oil and corrosive gases, so as to avoid damaging the insulation of the generator winding.

　　Clean the ventilation duct and keep it unobstructed to ensure the normal ventilation and cooling of the generator. The temperature of cooling air shall not be too low to prevent condensation of water droplets on windings and other conductive devices.

　　Corrosion and rust prevention:

　　Check whether the paint on the surface of the generator falls off. If there is rust, remove rust in time and apply antirust paint.

　　For parts such as slip rings, the surface should be kept smooth and cleaned and inspected regularly.

　　Second, the ship-borne generator regular inspection and maintenance

　　Pre-startup inspection:

　　Before the ship-borne generator is put into operation, it should be carefully checked whether there are sundries in it to prevent foreign objects such as screws, tools and rags from falling into it.

　　Use dry compressed air to remove dust from all parts of the generator.

　　Check the lubrication of generator bearings to ensure that the quality and quantity of lubricating oil or grease meet the maintenance requirements.

　　Check the connection between the generator and its prime mover to ensure that their axes are in the same straight line.

　　Check whether the rotor is flexible and the bearing quality.

　　Measure the insulation resistance of stator and rotor lines to ensure that it is not lower than the specified value.

　　In-service monitoring:

　　Monitor the temperature rise, voltage, power factor, grid frequency and other parameters of the ship-borne generator to ensure its operation within the normal range.

　　Regularly check the rotation of the rotor, the working conditions of the slip ring and the carbon brush, and whether there are any abnormal phenomena such as sparks.

　　III. Dismantling and Drying of Ship-borne Generator

　　Precautions for disassembly:

　　When disassembling and assembling the ship-borne generator, care should be taken not to damage the components, especially the stator coil and rotor protruding out of the frame.

　　When the rotor is taken out, cardboard should be placed between the stator and rotor of the motor to prevent damage to the core and winding.

　　When binding the rotor with steel cables, it should be ensured that the steel cables do not touch the rotor journal, slip ring, transfer lead and other parts.

　　Drying treatment:

　　For newly installed or long-term disabled generators, they should be dried before operation.

　　If the generator is damp, it can be dried by hot air method, short-circuit current drying method or on-load drying method.

　　During the drying process, the temperature and insulation resistance should be measured regularly to ensure the drying effect.

　　Four, ship-borne generator lubrication and replacement

　　Bearing lubrication:

　　For sliding bearings lubricated by oil ring, the oil quantity should be kept moderate to avoid oil injection during operation.

　　For motors with ball bearings or roller bearings, the grease should be changed regularly.

　　Parts replacement:

　　Check the parts of the generator set regularly, such as belts and filter elements, and replace them in time if they are worn.

　　Check and replace lubricating oil and coolant regularly to keep the unit in good condition.

　　V. Performance Test and Record of Ship-borne Generator

　　Performance test:

　　Regularly test the performance of the ship-borne generator, including whether the output voltage, frequency and other parameters meet the standards.

　　Find potential problems in time and deal with them through performance testing.

　　Record maintenance information:

　　Record the time, content, replaced parts and problems found in each maintenance.

　　Establish a complete maintenance file for subsequent analysis and improvement.

　　To sum up, the daily maintenance management of ship-borne generators involves many aspects, including general maintenance, regular inspection and maintenance, disassembly and drying, lubrication and replacement, and performance testing and recording. The implementation of these maintenance and management measures can improve the stability of the generator and prolong its service time, and provide a strong guarantee for the normal operation of the ship.

　　The daily maintenance of marine diesel generator set is the key to ensure its stable operation. The following are some precautions for routine maintenance: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/

　　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.

　　Flexible circuits, also known globally as flex circuits, flexible printed circuit boards, flex print, or flexi-circuits, are part of the electronic and interconnection family. They consist of a thin insulating polymer film with conductive circuit patterns affixed to it, usually coated with a thin polymer for protection.It is strictly required by such a standard, RF PCB Only with today’s development scale, can we have the proud momentum to crush our competitors. https://www.wellcircuits.com/

　　The technology has been used for interconnecting electronic devices since the 1950s and is now a crucial interconnection technology in many advanced electronic products today.

　　pick-and-place-2.jpg

　　Size and Weight Reduction Benefits of Flexible Circuitry

　　Wiring solutions that fit where rigid boards cannot.

　　Thin, lightweight products that are durable.

　　Miniaturized versions of existing technologies.

　　Three-dimensional packaging geometry.

　　A low number of device interconnects.

　　Shock and vibration resistance.

　　These benefits highlight flexible circuitry as an ideal solution for mobile consumer electronics. Inside modern devices like smartphones and laptops, flexible circuitry plays a critical role.

　　In mobile devices, using rigid circuitry would result in devices that are too large, heavy, and fragile to carry conveniently, exemplified by the Osborne I, the first fully powered mobile computer, weighing an intimidating 24.5 pounds. Size and weight reduction is only part of the flexible circuit story; they are also ideal for high-temperature and high-density applications.

　　High Temperature and High-Density Applications

　　Flex circuits, often made of polyimide or similar polymers, dissipate heat better than most rigid circuit board materials. This feature allows flexible circuits to be placed in locations where heat would impact the performance of rigid circuit boards.

　　Flexible circuit boards can withstand extreme temperatures ranging from -200＜C to 400＜C, making them desirable for borehole measurements in the oil and gas industry and preferred in industrial sensor technologies for their small size and durability.

　　High temperature resistance, combined with chemical resistance, excellent resistance to radiation and UV exposure, and the ability to control impedances in high-density designs, makes flexible circuits highly beneficial for manufacturers.

　　Why Not Make All Circuit Boards Flexible?

　　Flexible circuit boards are certainly useful, but they are not going to replace rigid circuit boards for all applications. Cost efficiency is the main obstacle to implementing an exclusively flexible circuit board design in a consumer product. Rigid circuit boards are less expensive to manufacture and install in a typical automated high-volume fabricating facility.

　　Typically, the ideal solution for an innovative product is one that incorporates flexible circuitry when necessary, and employs solid, reliable rigid circuit boards where possible to keep manufacturing and assembly costs down.

모모What is FR-4?Sufficient data show that FLEX PCB It can drive many people to find jobs, thus driving economic development. https://www.wellcircuits.com/

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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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모모Single-layer PCB

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모모Two-layer PCB

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모모Multilayer PCB

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모모High TG PCB Specifications

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모모The 몷Tg몸 refers to the glass transition temperature of the PCB. It indicates the temperature at which the material begins to transition from a solid state to a liquid state (learn more about Tg). If the operating temperature exceeds the specified Tg value, the circuit board can lose its structural integrity, which may negatively affect its functionality.

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모모Standard PCBs typically have a Tg value of 130뫢C C 140뫢C, while high-Tg PCBs range from 170뫢C to 180뫢C.

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모모Typical Application Areas

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모모Multilayer boards

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모모Industrial electronics

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모모Automobile electronics

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모모High-temperature electronic components

　　Flexible circuits, also known globally as flex circuits, flexible printed circuit boards, flex print, or flexi-circuits, are part of the electronic and interconnection family. They consist of a thin insulating polymer film with conductive circuit patterns affixed to it, usually coated with a thin polymer for protection.It is strictly required by such a standard, RF PCB Only with today’s development scale, can we have the proud momentum to crush our competitors. https://www.wellcircuits.com/

　　The technology has been used for interconnecting electronic devices since the 1950s and is now a crucial interconnection technology in many advanced electronic products today.

　　pick-and-place-2.jpg

　　Size and Weight Reduction Benefits of Flexible Circuitry

　　Wiring solutions that fit where rigid boards cannot.

　　Thin, lightweight products that are durable.

　　Miniaturized versions of existing technologies.

　　Three-dimensional packaging geometry.

　　A low number of device interconnects.

　　Shock and vibration resistance.

　　These benefits highlight flexible circuitry as an ideal solution for mobile consumer electronics. Inside modern devices like smartphones and laptops, flexible circuitry plays a critical role.

　　In mobile devices, using rigid circuitry would result in devices that are too large, heavy, and fragile to carry conveniently, exemplified by the Osborne I, the first fully powered mobile computer, weighing an intimidating 24.5 pounds. Size and weight reduction is only part of the flexible circuit story; they are also ideal for high-temperature and high-density applications.

　　High Temperature and High-Density Applications

　　Flex circuits, often made of polyimide or similar polymers, dissipate heat better than most rigid circuit board materials. This feature allows flexible circuits to be placed in locations where heat would impact the performance of rigid circuit boards.

　　Flexible circuit boards can withstand extreme temperatures ranging from -200＜C to 400＜C, making them desirable for borehole measurements in the oil and gas industry and preferred in industrial sensor technologies for their small size and durability.

　　High temperature resistance, combined with chemical resistance, excellent resistance to radiation and UV exposure, and the ability to control impedances in high-density designs, makes flexible circuits highly beneficial for manufacturers.

　　Why Not Make All Circuit Boards Flexible?

　　Flexible circuit boards are certainly useful, but they are not going to replace rigid circuit boards for all applications. Cost efficiency is the main obstacle to implementing an exclusively flexible circuit board design in a consumer product. Rigid circuit boards are less expensive to manufacture and install in a typical automated high-volume fabricating facility.

　　Typically, the ideal solution for an innovative product is one that incorporates flexible circuitry when necessary, and employs solid, reliable rigid circuit boards where possible to keep manufacturing and assembly costs down.

　　Flexible circuits, also known globally as flex circuits, flexible printed circuit boards, flex print, or flexi-circuits, are part of the electronic and interconnection family. They consist of a thin insulating polymer film with conductive circuit patterns affixed to it, usually coated with a thin polymer for protection.As it happens, many people are killed PCB manufacturing in China And bring more benefits, make it flourish, and promote the industry greatly. https://www.wellcircuits.com/

　　The technology has been used for interconnecting electronic devices since the 1950s and is now a crucial interconnection technology in many advanced electronic products today.

　　pick-and-place-2.jpg

　　Size and Weight Reduction Benefits of Flexible Circuitry

　　Wiring solutions that fit where rigid boards cannot.

　　Thin, lightweight products that are durable.

　　Miniaturized versions of existing technologies.

　　Three-dimensional packaging geometry.

　　A low number of device interconnects.

　　Shock and vibration resistance.

　　These benefits highlight flexible circuitry as an ideal solution for mobile consumer electronics. Inside modern devices like smartphones and laptops, flexible circuitry plays a critical role.

　　In mobile devices, using rigid circuitry would result in devices that are too large, heavy, and fragile to carry conveniently, exemplified by the Osborne I, the first fully powered mobile computer, weighing an intimidating 24.5 pounds. Size and weight reduction is only part of the flexible circuit story; they are also ideal for high-temperature and high-density applications.

　　High Temperature and High-Density Applications

　　Flex circuits, often made of polyimide or similar polymers, dissipate heat better than most rigid circuit board materials. This feature allows flexible circuits to be placed in locations where heat would impact the performance of rigid circuit boards.

　　Flexible circuit boards can withstand extreme temperatures ranging from -200＜C to 400＜C, making them desirable for borehole measurements in the oil and gas industry and preferred in industrial sensor technologies for their small size and durability.

　　High temperature resistance, combined with chemical resistance, excellent resistance to radiation and UV exposure, and the ability to control impedances in high-density designs, makes flexible circuits highly beneficial for manufacturers.

　　Why Not Make All Circuit Boards Flexible?

　　Flexible circuit boards are certainly useful, but they are not going to replace rigid circuit boards for all applications. Cost efficiency is the main obstacle to implementing an exclusively flexible circuit board design in a consumer product. Rigid circuit boards are less expensive to manufacture and install in a typical automated high-volume fabricating facility.

　　Typically, the ideal solution for an innovative product is one that incorporates flexible circuitry when necessary, and employs solid, reliable rigid circuit boards where possible to keep manufacturing and assembly costs down.

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모모Kickstarter is a crowdfunding platform dedicated to creativity, with a mission to 몷help bring creative projects to life.몸 Many creators have launched successful projects on Kickstarter, and we are excited to support them in this journey.

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모모To further support creators, Wellcircuits is offering the following exclusive benefits:

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모모10% discount on assembly services (up to $300) for any successful Kickstarter crowdfunding project. You can also request a coupon code for your backers!

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모모To claim this offer, simply send your project link to anson@wellcircuits.com, and you will be eligible for the discount.

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모모Wellcircuits is a professional PCB manufacturing and assembly company with a strong reputation among engineers worldwide. We ensure that all aspects of your crowdfunding project run smoothly. All our components are 100% original, and we guarantee timely delivery so that creators can send products to their supporters as quickly as possible. In addition, we offer exceptional after-sales support to ensure complete satisfaction.

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모모Let몶s bring creative projects to life!

　　The typical depth of the V-cut is 3/4 of the board¨s thickness. If you plan to use V-cuts, we recommend maintaining a safe distance from the V-cut line to any traces. Please consider this when designing your panels.At first, PCB meaning It developed out of control and gradually opened up a sky of its own. https://www.wellcircuits.com/

　　V-cut example 1

　　V-cut Example 1

　　V-cut example 2

　　V-cut Example 2

　　V-cut example 3

　　V-cut Example 3

　　V-Cut Machine