The cylinder head is the main component of the diesel generator set. It is used to close the upper part of the body, form the combustion chamber space with the piston and cylinder liner, and ensure the smooth flow of intake and exhaust. process of diesel generator set. Its basic structure is shown in Figure 1. The cylinder head is a fixed part of the diesel generator set, generally made of cast iron or aluminum alloy. To dissipate the heat, a water jacket is poured inside the cylinder head. The coolant enters the water jacket of the cylinder block from the water tank (or radiator) under the pressure of the water pump, and then enters the water jacket inside the cylinder head through the water outlet of the cylinder gasket, then is discharged through the water outlet hole on the end face of the cylinder head into the water outlet pipe of the cylinder head, and finally returns to the water tankwater.
Cylinder heads have various structural forms and many classification methods.
1. Classification by number of cylinders
(1) Monoblock cylinder head
A monoblock cylinder head means that each cylinder has a separate cylinder covers, such as the cylinder heads of S1100 and S195 single-cylinder diesel generator sets, and the cylinder heads of 190 series multi-cylinder diesel generator sets.
(2) Combined cylinder head
Combined cylinder head, that is, two cylinders share one cylinder head, such as the cylinder head of 135 series diesel generator set and 120 series diesel generator set Unit cylinder head, etc.
(3) Integrated cylinder head
Integrated cylinder head, that is, every four or six cylinders share a cylinder head. The cylinder head of Cummins series diesel generator sets is currently widely. used. This is an integrated cylinder head.
2. Classification by number of valves
(1) Cylinder headtwo-valve
There are two valves on each cylinder of the two-valve cylinder head. , that is, the intake valves and the exhaust valves. Two-valve cylinder heads are mainly used for high-speed, small or low-pressure diesel generator sets with smaller bores, such as Cummins diesel generator sets, Steyr series diesel generator sets and Cummins diesel generator sets. the 120 series.
(2) Four-valve cylinder head
The four-valve cylinder head has four valves installed on each cylinder, namely two intake and two exhaust valves. The intake and exhaust passages are arranged on either side of the cylinder head. The air passage arrangement of a four-valve cylinder head generally includes two types: series and parallel. The two valves with the same name in the series arrangement share an air passage, like the cylinder head of the groupe 190 series diesel generator; two valves of the same name arranged in parallel. Each is connected to an independent air passage, such as the cylinder head of a 12V150 series diesel generator.
3. Classification according to the materials used
(1) Cast iron cylinder head
Cast iron cylinder heads are generally made of gray cast iron, alloy cast iron or ductile iron, such as Cummins. The cylinder head of the diesel generator is made of gray cast iron.
(2) Aluminum alloy cylinder head
Aluminum alloy cylinder head is characterized by good thermal conductivity and light weight, but its thermal resistance is low, easy to deform and its cost is high. Aluminum alloy cylinder heads are currently used in high-speed light-duty diesel engines. For example, the cylinder heads of 12V150 series diesel engines use aluminum alloy materials.
When should the group's electric heating function be activateddiesel generator
Low temperature alarm What type of machine do you have? Generally, a generator with a low temperature alarm is a better machine. I wonder if the alarm occurs after operation or when it is not operating? The alarm after operation can be caused by removing the thermostat. Reinstalling the thermostat should resolve the issue. If there is no alarm when it is not running, simply add a dedicated water heater to the generator.
The above is for reference only: Ningbo Rixing Power Technology Co., Ltd.
What does it mean for a diesel generator to have a backup hot?
Using diesel generator sets in winter, especially in the north, due to the low temperature, the diesel generator set has not been turned on for a long time. If the water tank treasure is not added, the water tank may freeze. Therefore, it is very important to check the water in the water tank of the diesel generator set. Generally, imported diesel generators are equipped with a water heater to avoid the above situation. If you have any questions about the maintenance or use of the diesel generator, you can contact Henan Zhengfa Power Generation Equipment.
According to the literal meaning of the poster, the diesel generator must be equipped with a water heater.
The water heater is a professional preheating device for diesel engine cooling water and lubricating oil. It is an essential supporting device for diesel engine drag equipment when the working environment may be below 4°C. When the operating environment is likely to be below 4°C, during the start-up phase, the lubricating oil and cooling water of the engine may condense into a solide and lose their lubricating or cooling functions, thus damaging the engine.
Generally, when the external ambient temperature is low, it is recommended to equip the diesel generator set with a water heater.