柴油发电机励磁系统的工作原理？

柴油发电机励磁系统的工作原理？

励磁系统的主要作有：
1）根据发电机负荷的变化相应的调节励磁电流，以维持机端电压为给定值；
2）控制并列运行各发电机间无功功率分配；
3）提高发电机并列运行的静态稳定性；
4）提高发电机并列运行的暂态稳定性；
5）在发电机内部出现故障时，进行灭磁，以减小故障损失程度；
6）根据运行要求对发电机实行最大励磁限制及最小励磁限制。

机组励磁系统灭磁方法和用处？

主要有灭磁开关灭磁，逆变灭磁，
灭磁开关灭磁，是在灭磁开关主接点断开前先通过一个灭磁接点接入灭磁电阻，也就是使转子回路并联灭磁电阻，然后断开主接点，在灭磁开关主接点断开后由于灭磁接点把灭磁电阻并联在转子一起，励磁绕组能量转移到灭磁电阻发热消耗完成灭磁目的
逆变灭磁--是在灭磁命令发出后，励磁调节器控制可控硅--通常是三相全控桥-的控制角大于90度，此时可控硅处于逆变状态，它把励磁绕组能量吸入到励磁变压器及定子消耗掉
通常 正常停机采用逆变灭磁--无机械动作，无火花，无污染，但如果调节器及可控硅等有故障将不成功；
保护动作灭磁应采用灭磁开关灭磁--强制灭磁--可靠，及时调节器及可控硅等有故障，也能成功灭磁。

康明斯发动机120马力 的皮带怎么装？

皮带套过风扇叶搭在风扇轴上，再套在水泵和发电机上，用专用工具（四方）别住涨紧轮，把皮带安装到涨紧轮下面，顺便检查涨紧轮是否转动正常，如果涨紧轮不正常还会损坏皮带的。

康明斯发动机皮带轮轴承用什么润滑油？

3 #锂基脂，也就是黄油，最好用新品。应急时可以维修加注优质润滑脂。及早更换原装配件。

东风康明斯260发动机换四配套怎么下排气漏淌机油？

1、机油加多了
换四配套时是否检查了气门，气门积炭严不严重？
2、在维修厂确定的情况下，观察一段时间，是否烧机油很严重；
如过依然很严重，悲剧告诉你可能活塞环上对口了

同步发电机并联运行功率因数相差很大是怎么回事?

两台发电机并联运行时，每台发电机各自必须装有无功调差装置，而且应将两台发电机的调差率基本调整一致（一般控制在3%左右）。这样在并联运行时每台发电机各自分担相应的无功功率，就不会出现并联运行时功率因数相差很大的情况。
      但如果两台发电机的调差率相差较大、或其中一台（甚至两台都）没有装调差装置的话，则其中特较硬的一台（也就是调压精度较高、调差率小或没有装调压装置）与特性较软的一台（安装了调压装置且有一定调差率）就会产生无功功率分配不一致，也就是俗称的抢无功而导致功率因数相差较大。

同步发电机自动稳压的调节与功率因数有关吗？

较大容量的发电机电压调节器是需测量定子电流的，也就是说与功率因数有关。

英国珀金斯柴油机烧机油换缸套活塞环不换活塞可行吗？

一般烧机油换了缸套和环子效果就很好了，活塞如果没有明显的拉毛现象，环槽磨损不明显，没换问题不大，

威尔信柴油发电机组用柴油机缸套，活塞，活塞环都是新换的，为何废气孔喷机油？

活塞环没有坏而且是新换，有可能是活塞环安装问题，端口没有旋转180°，导致活塞漏气，

沃尔沃柴油发动机刚大修过为什么机油会从发动机废气管喷出？

机油是否加多了。2.活塞环是否装反了，或者装错了。

英国珀金斯柴油发动机烧机油的原因有什么？

环.活塞.缸 磨损
气门油封 损坏
缸垫密封失效泄漏
加入的机油量 超标

柴油机吊缸后，活塞环全部换新装复后，该柴油机投入正常使用前应采取哪些措施？

肯定要磨合的，磨合要记住2点。
1：不要全速，中速以下。
2：不要憋车

康明斯发动机ISF2.8s3129T的点火正时怎么对？

需要专用工具的，有个凸轮轴定位板、曲轴定位销和一个刚性的链条张紧器。方法：
1、拆去前端的真空泵和后面的链轮室盖板，盘车使凸轮轴到正确位置，然后用凸轮轴盖板定位，固定好螺栓。
2、松去后面的信号轮螺栓拆去链条。这是要把链条固定好，防止链条掉下去。曲轴前端的皮带轮上有一个小孔，对应的后面也有个小孔。盘车使两孔对其然后插上定位销。
3、用装好链条，和刚性链条张紧器，上好压紧斑和螺栓。然后换上原装张紧器，再还原即可。
康明斯柴油发动机废气管出柴油是什么原因？

有个别缸没有工作,喷油咀喷到缸内,缸没有工作,油就没有燃烧,所以才会有这种现象

重庆康明斯柴油机排烟管发红是什么问题？

是柴油后燃了，应该检查一下气门间隙和油嘴行程，如果是很久没做过保养了，建议调校一下油嘴和油泵

电喷劳斯莱斯发电机负载带不起，排烟管发红冒黑烟是什么问题，这是什么问题引起的？

卡特发动机上有几种传感器？

1发动机冷却液温度传感器、2进气温度传感器、3大气压力传感器、4涡轮增压器出口压力传感器、5机油压力传感器、6燃油压力传感器、7高压机油温度传感器、8喷射开启压力传感器、9转速传感器（正时）、10环境压力传感器、11液位传感器

卡特325c挖掘机水箱里进柴油什么原因？

喷油嘴下面的铜套坏了，换套就行了

东风康明斯180马力发动机配什么型号增压器？

HE221W, 厂家是无锡康明斯涡轮增压

The principle of generator excitation system?

Excitation system mainly has:

1) according to the change of the generator load corresponding adjusting excitation current to keep the voltage of the machine for a given value;

2) run in parallel with controlling the generator reactive power allocation between;

3) improve the static stability of generators in parallel;

4) improve the transient stability of generators in parallel;

5) inside the generator fails to destroy, to reduce the damage degree;

6) according to the operation requirements of generator adopts a maximum excitation limit and the minimum excitation limit.

Magnetic method and use of excitation control system?

Main have magnetic switch peg magnetic, magnetic extinguishing inverter,

Magnetic, magnetic switch peg is Lord of the magnetic switch contacts disconnect before through a magnetic contact access peg magnetic resistance, also is to make the rotor circuit of parallel magnetic resistance, and then disconnect main contact, in the main contact disconnect after a magnetic switch due to peg magnetic contact put out the magnetic resistance in parallel with the rotor, the energy transfer to the excitation winding magnetic resistance heating consumption finish peg magnetic purpose

Inverter drop-out, is destroyed in the magnetic command is issued, silicon controlled excitation regulator control - usually three-phase fully-controlled bridge - control Angle is greater than 90 degrees, the thyristor in the inverter state, it put the energy into the excitation transformer and excitation winding of the stator consume

Normal downtime usually adopt inverter magnetic blow-out - with no mechanical movement, no spark, no pollution, but if there is a fault controller and SCR will not success;

Protections drop-out should use magnetic switch peg magnetic - forced out the magnetic - reliable, regulator and silicon controlled rectifier has a fault in time, can also succeed magnetic blow-out.

Cummins engine with 120 horsepower belt?

Belt set a fan blades on the fan shaft, then set on the pumps and generators, use special tools (the quartet) don't live, when tight round to install belt in tight round here, by the way, check up tight round rotation is normal, if rise tight round abnormal will damage the belt.

What cummins engine pulley bearing lubricating oil?

3 # lithium base grease, i.e., butter, best new product. Can repair filling high quality grease when emergency. Replace the original accessories. As early as possible

Dongfeng cummins engine in 260 four auxiliary exhaust discharge under drip oil?

1, oil plus much more

In four supporting when check the valve, the valve carbon deposit is not serious?

2, in the case of a repair shop to determine and observe for a period of time, whether the oil burning is very serious;

Is still very serious, if the tragedy may tell you counterpart on the piston ring

Difference in synchronous generator in parallel operation of power factor is how to return a responsibility?

Two generator in parallel operation, each generator must be equipped with reactive tuning device, and two basic adjustment generator of adjustable rate should be consistent (general control in 3%). So that each generator in parallel operation share the corresponding reactive power, won't appear parallel runtime power factor vary widely.

But if the two generator of adjustable rate is large, or one of them (or even two) no controlled devices, is among them, a hard one (that is, high precision voltage regulator, voltage regulation device with adjustable rate little or no) with soft features a (install a pressure regulating device and has a certain adjustable rate) can produce reactive power distribution, which is commonly called rob reactive power and power factor is large.

Synchronous generator automatic voltage regulation and power factor?

Larger capacity of the generator voltage regulator is to measure the stator current, that is related to the power factor.

The British perkins diesel engine burning oil cylinder liner piston ring do not change the piston feasible?

General oil burning in the cylinder liner and ring effect is very good, the piston if there is no obvious phenomenon, hair ring groove wear is not obvious, not in question is not big,

Will letter diesel generator sets diesel engine cylinder liner, piston, piston rings are new change, why waste gas hole spray oil?

Piston ring is not bad and it is the new change, may be a piston ring installation problem, the port is not rotated 180 °, cause the piston air leakage,

Volvo diesel engine just overhaul why oil from the engine exhaust pipe jet?

The oil is added. 2. The piston ring is installed backwards, or wrong.

Reasons for the British perkins diesel engine to burn oil have?

Ring. The piston cylinder wear

Valve seal is damaged

Cylinder gasket seal failure

Add the oil quantity to exceed bid

Diesel engine after lifting cylinder, piston ring, after all a make-over after the diesel engine is put into normal use what measures should be taken before?

Bound to running-in, running-in remember 2 points.

1: don't at full speed, medium speed.

2: don't hold back the car

Cummins engine ISF2.8 s3129T ignition timing how to?

Need special tools, crankshaft positioning pin and a CAM shaft positioning plate, a rigid chain tensioner. Methods:

1, the vacuum pump down the front and the back of the sprocket wheel chamber cover, barring the camshaft to the correct position, then use the camshaft cover plate positioning, fixed bolts.

2, went to the back of the signal wheel bolt down the chain. This is to put the chain fixed well, prevent the chain fall. Crankshaft pulley of the front has a small hole, also have a hole at the back of the corresponding. Turning to make two holes and then plug in locating pin on it.

3, packed with the chain, and rigid chain tensioner, good compression and bolts. And then changed into original tensioner and reduction.

Cummins diesel engine exhaust pipe out is what reason?

Without work, have individual cylinder injection nozzle spray in the cylinder, the cylinder has no job, no burning oil, so just can have this kind of phenomenon

Chongqing cummins diesel engine exhaust pipe flushing is what problem?

Is after the diesel combustion, should check the valve clearance and nozzle schedule, if it is long time no doing maintenance, suggested that the set-up the nozzle and oil pump

Efi generator load with Rolls-Royce, exhaust pipe is red smoke is what problem, what's the problem cause?

Carter there are several kinds of sensors on the engine?

1 engine coolant temperature sensor, air intake temperature sensor 2, 3, atmospheric pressure sensor, 4 turbine supercharger outlet pressure sensor, oil pressure sensor, 6 fuel 5 7 high pressure oil pressure sensor, temperature sensor, 8 injection opening pressure sensor, speed sensor (timing), 9 of 10 environmental pressure sensor, liquid level sensor

Carter excavators tank into the diesel 325 c what reason?

Nozzle under the copper set is broken, change sets

Dongfeng cummins engine with 180 HP what type supercharger?

HE221W, manufacturer is wuxi cummins turbo