What Is Micro Hydro Electric Generator?

PT fuel pump system fault of AFC control devices are more prone to failure without proper calibration or their own fault, failure of governor or oil cut-off valve.

It is difficult for PT pump maintenance, general requirements correctly identify the fault source, then on the PT fuel pump test bench test or machine debugging.
1)
AFC control device.

To reduce exhaust pollution of diesel generator, a lot of engineering machinery and PT pump of automotive diesel engines are equipped with air fuel control unit (
AFC）
。

If air fuel control device failure in use, can lead to poor diesel engine running performance.
(1) and (starting
Or)
Speed is slow.

If diesel engine showed the phenomenon of starting difficulty or not starting, the possible reason is that an AFC airless adjustment of the needle valve closing or opening.
At this point, the exerted AFC devices of 0.

17 MPa pressure after the starting of diesel engine, diesel engine oil flow at the time of starting of bypass without air adjustment of the needle valve.

If the diesel engine to start, we should readjust without air adjustment of the needle valve;

If the diesel engine can't start that failure may in AFC devices, may also be caused by other reasons (

Note: high pressure can't exert, otherwise you will damage the diaphragm)
。

If the diesel engine show that the speed slow phenomenon, possible reason is aerate screw (
Connected to the intake manifold screw)
Blockage or loosening and sleeve of AFC devices.

The vent screw can be removed, check whether the blow.

If not, should be clear first screw or replacement ventilation;

Who can blow through, could be the sleeve is loose, need to change the necessary parts to properly installed.
(2) power and (
Or)
Cannot be accelerated.

If the diesel engine show that the power shortage phenomenon, possible reason was that the AFC devices of plunger in the starting position or diaphragm rupture.

At this point, the available to fuel control unit air ventilation with 0.

17 mpa pressure gas, the method to check if the plunger on a starting position, the air pressure to the device if no impact diaphragm rupture, leakage is aerate screw.
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The activation method for automatic diesel generator has two kinds, one kind is using artificial way of manual start, another kind is started automatically by the diesel generator control module.

Diesel generator set manufacturer today introduced the other advantage of different kinds of startup mode.

A 1, diesel generators, manual startup mode manual activation: test alarm system after normal first and will control concerns in the manual (
MAN)

Place, diesel generating sets can start on its own.

Parking: 2, diesel generator control open concern to stop (
停止)

Position or press the red emergency stop button can stop the generator.

Emergency situations can be directly press emergency stop button can be forced to stop.

If press the red emergency stop button must be returned in situ, otherwise the generator will not be able to start.

1, 2, automatic startup mode will open concern to automatic control,
AUTO)
, and cooperate with the power automatic transfer switch (
ATS）

Control switch should be used in automatic position, when mains stops, A•
T•

S will start signal generator control system, generator will start automatically.
2, when the control concerns to stop (
停止)

, or remain in the automatic, but the utility has returned to ATS that sent the signal, the parking diesel generator will stop automatically.

Note: the operation of diesel generators, due to the fault (
Speed, high temperature, low oil pressure, etc. )

And automatic stop occurs, the generator should be the fault reset button after troubleshooting pressure can be ready to start again.
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1.
1) rubber components shock absorber

Check whether the shock absorber of metal parts and rubber components is cracks or other damage.
2)

Check tag line in the damper hub and inertia components are aligned, as shown in figure 2
As shown in 81.
If you don't at bright appearance, deviation is greater than 1.
29 mm, the shock absorber should be scrapped.
3)
Check whether inertial components and wheel alignment.

Elements of plane and the installation of the hub surface must be aligned, deviation should be 0.
Within 63 mm.
4)

Inertial element diameter must be concentric with the wheel hub guide holes, the deviation should be less than zero.
76毫米(
0.
030in）
。
2.
Viscosity building inspection and repair of 1)

Check whether there is shock absorber installation flange in crack, as shown in figure 2 -
As shown in 82.

To check whether there is concave or convex damper hub on the body, if the parts damaged must be replaced.
2)
- find out shock absorber tag, as shown in figure 2
As shown in 83.
If it were printed on the shock absorber & other;
The British system & throughout;
（
By Holset company)
, should record the production date and code.
Such as: code & other;
A -
05'
Said in January 2005, manufacturing;
“
B -
05'
Said in February 2005, manufacturing;
“
C -
02'
Said in March 2002.
So on.
3.
Measuring the thickness of the shock absorber X1)

Scrape on the surface of the shock absorber on both sides of the four arrow position of paint, as shown in figure 2
As shown in 84.

Note: in addition to the paint can not use rough cloth or knife, should use a cleaning solvent or gauze.

Shock absorber thickness is measured with a micrometer in these four position X, click on the march from outside diameter measurement.
18 mm.
2)

If the position of any two position thickness difference more than 0.
25 mm should be scrapped.
4.
Check the shock absorber liquid leakage 1)
The crack detection imaging liquid (

Crack detection, including check crack the required amount of cleaning agent, penetrating agent imaging agent)
Rolling lip injection to the shock absorber.
2)

Shock absorber is placed within the temperature of 93 ℃ oven, should be shock absorber of rolling when put his lips down to the bottom of the oven, as shown in figure 2
As shown in 85.

In the furnace to keep 2 h, check whether there is rolled his lips in fluid flow, such as found that liquid leakage, must change the shock absorber.