Marine electrical debugging process and steps

Marine electrical and ship power plant debugging process and steps of:
1、in order to ensure the generator main switchboard power supply during debugging, on the bus and distribution panel on the generator bus apart, the obstruction of the main switch work of suspended chain circuit.If you don't need power supply other load on board equipment, the work can not do, 440 v insulation table had better take off or turn off the fuse.And check control drawings witchboard wiring is correct.
2、good distribution of generator load equipment, (usually resistance and water resistance and reactor respectively do the perceptual load) and make it work.With temporary cable will load equipment connected to the generator bus bar on the screen.
3、easy to debug in the generator and bus-bar indirectly into a three-phase isolation switch and a voltmeter.
4、check the generator transformer part of cold insulation resistance, should be in more than 2 m.And quote us distribution board clean.

 
 

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Taizhou Shunfeng Industry&Trading CO.,Ltd
Overseas Market Sales Dep.
Tel:+86-523-82386691
Fax:+86-523-86225700 
Mob:+86-15189919053
Skype: johnson8528
E-mail: info@shunmarine.com
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The distance of distribution box and switch tank

The distribution box and switch tank of security technology，and The construction site using tertiary distribution by electrical means,The total distribution box,the distance of diatribution box and switch tank.
Requirements for the safe use of distribution box and switch tank:
1:The material of distribution box and switch tank should choose steel plate,Also can choose insulation board, but you can't choose woodiness material.
2:The distribution box and switch tank should be installed correctly and firmly,Cannot be inverted, askew.Stationary distribution box and switch tank at the bottom of the vertical and the ground distance should be between 1.3 m —— 1.5 m.Mobile distribution box and switch tank at the bottom of the vertical and the ground distanceshould be between 0.6 m —— 1.5 m.
3:The power cord into the switch tank, it is forbidden to use plug connection.
4:The distance between the distribution box cannot be far away.The distance of distribution box and switch tank should not exceed 30 m.the distance of Switch tank and electrical equipment should not be more than 3 m.
5:Each electric equipment should have their own special switch tank,Must meet the "one machine, a brake, a leakage, a case of" requirements.It is forbidden to use the same switch directly control two more than two sets of electrical equipment (including strip).Switch tank must be set the leakage protector.The rated current < 30 ma, leakage action time < 0.1s.
6:All distribution box should match the lock, and may not be in the distribution box and switch tank to hook up or plug other electric equipment,switch tank it is forbidden to put sundry.
7:Wiring distribution box and switch box shall be conducted by the electrician operation, non electrical personnel shall not connecting.

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Marine Propeller structure characteristics

Propeller have 2 to 4 blade,blade number,the more the greater the power absorption.In high-power turboprop aircraft also USES a set of propeller shaft,actual it is two counter-rotating propeller,can offset the reaction torque.On the small aircraft engine power is less than 100 kw,the commonly used double leaf wooden propellers.It is with a patchwork of wood blade on both sides and to make up torsion,middle hole connected to the engine shaft.The propeller blades at a high speed rotating centrifugal force of inertia and aerodynamic load.In high-power propeller blade root by the centrifugal force of up to 200000 cows (20 tons).In addition to the vibration of the engine and cause.High power engine generally adopts 3 and 4 propellers,and multi-purpose aluminum alloy and steel to manufacture blades.Aluminum and steel blade for solid materials we can do it thinner,is helpful to improve the efficiency of the propeller in high speed.After 70 s is made of composite material blade in order to reduce weight.

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Marine propeller——stainless steel propellor

For a long time, material selection more Marine propeller of copper alloy, nickel aluminum bronze is the preferred material.
The main reason is:
(1) copper alloy corrosion resistance,stainless steel propellor can satisfy the using demand of the propeller in sea water.
(2) of the low melting point of copper alloy, is advantageous for the melting and casting, heat treatment, casting required by the processing can be used.Due to the copper alloy material strength is limited, with the increase of the large-scale and single shaft power of the ship, urgent need higher propeller materials research anddevelopment strength.Replace the copper alloy material of stainless steel screw, paddle material development become a new direction.With the large-scale, high speed of the ship and water pollution, stainless steel as the propeller material seems to be a trend.

It is mainly the advantages of simple introduction is as follows:
1, can be high strength. Under the condition of the same design, compared with copper alloy can be greatly reduced the weight of the propeller, to prevent the stern bearing wear, reduce the rotational inertia of the blade.
2, because of the high strength, large side blade design.Blade can be thinned, and can be made into many paddle, not only make the propeller propulsion efficiency, and to reduce the vibration of the blade, reduces the noise.
3, corrosion fatigue strength and resistance to cavitation erosion performance several times or even more than ten times that of copper alloy, which greatly improved the life of the blade, especially in water pollution, stainless steel has more advantages.
4, with one blade casting respectively, and then welded together can make very large propeller.

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Marine propeller installation parsing

Marine propeller is a propeller of modern ship the most widely used, it is generally installed in the stern.What is the reason?Because if the propeller is installed in the bow, is bound to highlight on the outside of the hull, collision damage easily.Put it in the dark tail, and then do the stern concave, propeller can get very good protection, it is not easy to damage.In addition, because the rudder behind the propeller is installed, because such arrangement can make the ship stability precision of control and strong power.
At present in the human world of transport, sailing in the water machine is relative to the slowest, of which the most key factor is water resistance than other means of transport in the air or the ground resistance.On the design of the ship, therefore, of utmost to improve the navigation, and precision is the key control direction.Buoyancy and weight is the focus of the whole sailing ship, this will not only determine the strength of the whole ship design, the ability to resist the wind and waves, also determines the ship hull subject.And it has been proved that placed power layout in the stern, not only can more reasonable distribution of the whole, the weight of the ship hull can effectively differentiate the internal space layout.So, propeller also more reasonable installation in the stern.

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The introduction of Marine propeller

Marine propeller is essential propulsion components of shipbuilding industry, Marine propeller design and machining precision, will directly affect the speed of ship propulsion.

Seen by the stern look ahead, behind the propeller blade surface said foliage or pressure side, the other side called back or suction side, blade and hub joint said blade root, its outer carbonyl said blade tip.Ahead of propeller rotates, blade leading edge water meet side first said in front, behind its said trailing edge on the other side.

Generation process to be processed because of propeller foliage and back, therefore, the positioning of two surface is difficult, need special fixture to ensure, after processing the leaf, leaf back over processing, the same blade Angle is constant.Generation process, coordinate work also on the wheel hub surface and rotary axis intersection.

For more products, Marine propeller consultation:
http://www.shunmarine.com
Taizhou Shunfeng Industry&Trading CO.,Ltd
Overseas Market Sales Dep.
Tel:+86-523-82386691
Fax:+86-523-86225700 
Mob:+86-15189919053
Skype: johnson8528
E-mail: info@shunmarine.com

ShunMarine Marine diesel generating sets by CCS classification survey

The ship appeared, ultra-low prices, shipyard signed orders, the shipbuilding industry to early low status into a glimmer of hope.For Taizhou Shunfeng Industry&Trading CO.,Ltd, the Marine diesel generator set production companies, is also a good news.

Recently zhuhai a shipbuilding enterprises will give the order for 400 kw cummins Marine diesel generating sets to ShunFeng production.Unit is chongqing cummins Marine engine powered KTA19 - DM, generators with cummins Stanford brand.ShunFeng in the shortest possible time to complete the production, and strict testing debugging work has been done.

Now China classification society to send engineers to ShunFeng Marine diesel generating sets of torsional vibration test and analysis, finally through survey.

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