About marine diesel engines
Marine diesel engines have high thermal efficiency, good economy, easy starting, and great adaptability to various types of ships. They were quickly used as ship propulsion power after they came out. By the 1950s, diesel engines had almost completely replaced steam engines in newly constructed ships. Marine diesel engines have become the main power of civil ships, small and medium-sized ships and conventional submarines. Marine diesel engines can be divided into main engines and auxiliary engines according to their roles in ships. The main engine is used as the propulsion power of the ship, and the auxiliary engine is used to drive the generator, air compressor or water pump.Marine diesel engines are generally divided into high-speed, medium-speed and low-speed diesel engines. The main performance indicators of the three types of diesel engines are listed in the table.The fuel valve test device, pneumatic high-pressure pump, and manual high-pressure pump are the three essential parts of the diesel engine.Marine main engines work under full load conditions most of the time, and sometimes under variable load conditions. Ships often sail in turbulence, so marine diesel engines should be able to work reliably under the conditions of trim 15°～25° and heel 15°～35°. Most ships use supercharged diesel engines, and low-power non-supercharged diesel engines are only used on small boats. Low-speed diesel engines are mostly two-stroke engines, medium-speed diesel engines are mostly four-stroke engines, and high-speed diesel engines have both. The scavenging forms of marine two-stroke diesel engines include backflow scavenging, port-valve DC scavenging and opposed piston port scavenging. High-power medium and low-speed diesel engines widely use heavy oil as fuel, and high-speed diesel engines still mostly use light diesel.Directly drive the propeller, in order to make the propeller have high propulsion efficiency, a lower speed is required. Medium and high-speed diesel engines drive propellers through gear reduction boxes. Gear boxes are generally equipped with a reverse mechanism to achieve propeller reversal, but low-speed diesel engines and some medium-speed diesel engines can reverse themselves. Medium and high-speed diesel engines also realize electric transmission through generator-motor-propeller. When high power is required, multiple engines can be used in parallel, and only one main engine can be used when sailing at low speeds, thereby improving operating economy and reliability. When two main engines are installed on the same ship, they are divided into left and right engines according to the installation position and the steering of the propeller. DetailFUEL INJECTOR TEST UNIT
FUEL INJECTOR TEST UNITTheMarine fuel injector testing unit HDP is equipped with a digital readout for effective and precise testing of fuel injectors in 2– & 4 – stroke marine diesel engines.A well-functioning fuel injector provides an efficient combustion and therefore low fuel consumption.The HDP1100-X has been developed upon request from a major engine builder enabling test of the electronic fuel injector placed in the Wärtsilä RT-flex / W-X Common Rail engine. DetailHow to save port usage fees in shipping
Port charges are one of the main overhead items of transportation costs. Some shipping companies’ port commissions account for more than 1/4 of the total cost, second only to fuel costs and ship repair costs. Therefore, saving port fees is a problem that ocean shipping companies must pay attention to in order to reduce transportation costs. Generally speaking, the ways for the ship to save port charges can be reflected in the following aspects:1. The shipowner must understand and master the charging rules of various fees in each port, and the adjustment of the rates. 2. The shipowner should pay great attention to reasonable arrangements for the ship's various operations in the port, and make corresponding records. 3. Correctly grasp the time of entry and exit of ships. Efforts should be made to get in and out of the port during the day, because the port pilotage, tugboat, mooring, and other costs of ports in various countries will increase surcharges at night and holidays. 4. Before the ship enters and exits the port, if possible, level the fore and aft draft of the ship as much as possible to reduce the maximum draft of the ship. Because some ports, such as the port of Japan, the pilotage fee is based on the gross tonnage of the ship and the maximum draft at the fore and aft. 5. Declare the tonnage of the ship correctly. Ship tonnage tax, ship port fees, lighthouse fees, etc. are all calculated based on the ship’s tonnage. For ships with two or more full decks, triangular tonnage marks can be drawn on both sides, and two tonnages of different sizes can be used to replace the open and closed tonnages of the past shelter-deck ships. When the tonnage mark is submerged in the water, the ship should declare the large tonnage; when the tonnage mark is not submerged in the water, the ship should declare the small tonnage. 6. Stow goods reasonably. Strive for the simultaneous operation of all cargo tanks, and balance the loading and unloading time of each tank as much as possible to shorten the ship's time in port. 7. Make all preparations in time to reduce various waiting time costs. 8. The shipowner should carefully review and sign various charging documents to prevent undue lossesManual high pressure pump DetailFuel Valve Test Pump Unit
Fuel Valve Test Pump Unit, it is recommended to contact professionals for maintenance work, but if you pay more attention in your daily life and standardize the operation, you can also avoid its failure to a certain extent. Changzhou Allison will summarize for everyone Standardized operation of the six-point fuel injector test bench.1. In the process of operating the controller, the operator should wear safety glasses.2. Use an independent dedicated socket and perform reliable grounding. The injector test bench supports high-speed solenoid valve common rail injectors, and supports the third-generation high-pressure common rail technology piezoelectric crystal common rail injector; 6-channel common rail injector; supports multiple rail pressures Sensor; intelligent PID algorithm, more accurate pressure control; short-circuit protection in both hardware and software, the machine is more reliable; safety protection design prevents misoperation by operators, making it safer to use. The power cord of this controller is a three-wire plug, which is connected to a standard three-wire socket, please ensure reliable grounding;3. If the power supply voltage is unstable, please connect the controller to the power supply regulator for use.4. Regularly inspect whether the AC power cord is damaged, and whether there is dust accumulation on the power plug or power socket. 5. If the controller appears abnormal, or emits abnormal sounds or smells, or the controller becomes too hot to touch, please stop using it immediately (use) and unplug the AC power cord and all other plugs from the power socket. Connection line. 6. If the controller fails, please contact the after-sales service personnel to get the necessary help.Fuel Valve Test Pump Unit manufacturer DetailFuel Valve Test Pump Unit
The fuel valve test device with digital display function has the advantages of large power, small size, compact structure and easy operation. This test device is mainly used for modern high-power marine diesel engines to measure the spray status of their fuel injectors, and is necessary for high-power diesel engines. Testing tool. Suitable for B&W low-speed diesel engine 35-98 engineFlexible fuel injector testsolutions for 2- and 4-stroke engines DetailHYDR.PUMP,HAND OPERATED
Hydraulic pump, manual failure and troubleshootingA manual hydraulic pump is a pump driven by manpower, so it is called a manual hydraulic pump. The manual hydraulic pumps currently on the market are generally divided into single-stage manual hydraulic pumps and two-stage manual hydraulic pumps.The single-stage manual hydraulic pump generally has a working pressure lower than 70MPa,Two-stage manual hydraulic pumps generally work pressure higher than 70MPaWhat we are talking about today is the common faults and troubleshooting of the two-stage manual hydraulic pump Fault description Method of exclusionPressured but no oil discharge1.Check whether the oil circuit outside the pump is unblocked2.Check whether the blocked steel ball in the oil pressure output port of the pump is taken out3.Depot RepairNo pressure and no oil discharge1.Check whether the fuel tank has enough fuel.2.Whether the fuel tank cap is loosened, please loosen it if it is not loosened3.Depot RepairNot holding pressure1.Check the joints, connected hydraulic tools and oil circuit for oil leakage2.Whether the pressure relief valve is closed, if it is not closed, please close it3.Gently tap the pressure relief valve with a small hammer (in the closed state)Warn!Rust-preventing hydraulic oil with a viscosity of 7-10 cSt at 50° C. DetailFuel Valve Testing Device
Fuel Valve Testing DeviceFuel Valve Testing Device is mainly used in modern high-power marine diesel engines to measure the spray status of their fuel injectors. It is a necessary testing tool for high-power diesel engines. Allersen fuel injector test bench is suitable for B&W low-speed diesel engine 35-98.The structure of the marine fuel injector test bench is composed of shell, fuel tank, air pressure gauge, digital pressure gauge, wind pressure regulating valve, hand control valve, air driven hydraulic pump, stainless steel pipe and other hydraulic components. Its performance is stable and reliable and comparable. Similar imported products from abroad.Allersen injector test bench has the characteristics of stable quality, large flow rate and strong versatility.Model:HDP1100-D2Technical data：1.Outputpressure:Max.80MPa at 0.7MPa air input.2.Air consumption:12 Liters/cycle at 0.7MPa air input.3.Max. flow of fuel oil:40ML/cycle at an air input of 0.4Mpa4.Pumping speed:30cycle/Min at 0.4MPa air input (no output pressure).5.Tank capacity:8L6.Dimension:700x450x1120mm7.Weight:77kg DetailFuel Valve Test Unit common faults and troubleshooting
Common faults and troubleshootingModel:HDP1100-D2(1) The pressure cannot be built up:1. Check whether the nut of the injector fixing screw is tight (compression nut).2. Check whether the test oil meets the hydraulic oil specified in this manual (replace the specified oil). 3. Check whether the filter is cleaned according to the specified time (replace and clean the oil filter). 4. Check whether the oil level of the fuel tank is too low (add test oil).(2) The test bench does not work: 1. Check whether the air pipeline connected to the test bench is unblocked (replace the joint and the air pipe). 2. Check whether the air pressure regulating valve (3) and the input air meter (6) have air pressure (replace the air pressure regulating valve).(3) Pressure leakage: 1. Check whether there is any leakage in the joints inside the test bench (tighten the joints).2. Check whether the oil return valve leaks (grind the oil return valve stem, replace the oil return valve). 3. Check the input and output joints of the high-pressure oil pump for oil return (disassemble the two joints to clean or replace the two inlet and outlet joints).(4) The pressure gauge does not return to zero when the pressure is zero: After the pressure on the test bench is completely released, adjust the "0-adj" knob at the back of the digital display to return to zero. Increase in clockwise direction and decrease in counterclockwise direction. (If there is no response, replace the pressure gauge and pressure sensor).(5) The digital display meter does not display: 1. Check the power input terminal of the digital display meter (terminal 1, 2 is 110VAC; terminal 1, 3 is 220VAC. Choose which group of inputs according to the situation on board, please consult the electrical engineer on board). 2. Check whether the input terminal has electricity, if there is electricity, it will not display (replace the digital display meter.) (6) Garbled characters on the digital display:If the replacement pressure sensor is still garbled, please replace the digital display. DetailAllison pneumatic hydraulic pump thick accumulation thin price down to the bottom
Allison pneumatic hydraulic pump thick accumulation thin price down to the bottom 2019-08-08 10:43:14 Online: 2019-08-08 10:43:14 With the help of time and technology, the achievements made by the independent brands in the domestic market of pneumatic hydraulic pump and fuel injector in just a few decades are obvious to all in the shipping industry. First of all, they broke the monopoly of similar imported products from foreign countries. Second, it depresses prices and services. Such as small HQ150 pneumatic hydraulic pump. Domestic brands have always been the low-end route, because of Allison pneumatic hydraulic pump, cost-effective by the ship recognized. With the gradual improvement of Allerson's reputation in the shipping industry and the market demand. Allerson is constantly developing new products and innovating on old ones. Allerson pneumatic hydraulic pump thick accumulation of the price all the way down to the bottom. DetailHydraulic cylinder disassembly precautions
Hydraulic cylinders are commonly used in jacking operations. They are widely used jacking tools. Allison hydraulic cylinders are designed to operate at pressures ranging from 0-200 MPa. When we need to remove the hydraulic cylinder maintenance, some things must be paid attention to.First, telephone consultation by the factory, the factory's technical personnel for technical guidance.2. Care shall be taken to avoid contamination of the parts caused by the environment.3. Disassembled parts and components shall be covered with plastic sheets.IV. The disassembled parts shall be inspected. If there is any abnormality, they shall be repaired or replaced.Above for you to introduce a few hydraulic cylinder dismantling matters to pay attention to, I hope to help you. Allerson hydraulic cylinder shall pay attention to the disassembly method, to avoid improper operation caused by the damage of hydraulic cylinder parts resulting in irreparable consequences. Detail
Ai Lesen (ChangZhou) Power Technology Co., Ltd.
Contact: Shen Yu
E-mail: ailesen@163.net
Contact: +8613815036227
Address: AILESEN(CHANGZHOU)POWER TECHNOLOGY CO.,LTD
