Multi-cylinder diesel engine test room cooling water auxiliary system
A diesel engine and cooling water technology, which is applied in the field of diesel engine testing, can solve the problems of large temperature fluctuations of cooling water and difficult to stabilize, and achieve the effect of expanding the scope of use
Inactive Publication Date: 2014-04-23
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology
However, for small-power diesel engines, the change in the flow rate of external circulating water caused by small changes in the opening of the large-diameter electric control valve will cause a huge change in the temperature of the cooling water of the diesel engine, which will often cause small-power diesel engines to appear during the test. The cooling water temperature fluctuates greatly and it is difficult to stabilize the situation
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[0007] Such as figure 1 As shown, a multi-cylinder diesel engine laboratory cooling water auxiliary system can be used to accurately control the cooling water temperature of the diesel engine when the large, medium and small power diesel engine tests are carried out in the high-power diesel engine laboratory. It includes diesel engine 1, expansion tank 2, first plate heat exchanger 3, first gate valve 4, electric regulating valve 5, second gate valve 6, first water filter 7, second plate heat exchanger 8, third gate valve 9 , the first solenoid valve 10, the fourth gate valve 11, the second water filter 12, the third plate heat exchanger 13, the fifth gate valve 14, the second solenoid valve 15, the sixth gate valve 16, the third water filter 17 and pipelines . Its structure is: the cold water inlet d of the first plate heat exchanger 3 is connected to the second gate valve 6, the first water filter 7 to the external source circulating cooling water inlet pipe 18 through the ...
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The invention relates to a multi-cylinder diesel engine test room cooling water auxiliary system. The multi-cylinder diesel engine test room cooling water auxiliary system comprises three small plate-type heat exchangers, an expansion tank, a small-diameter electric control valve, a solenoid valve, a brake valve, a water filter, pipelines and the like. The working states of the electric control valve and the solenoid valve are adjusted to make the plate-type heat exchangers can be used to perform heat exchange amount microadjustment in the whole heat exchange range to realize the advantage that accurate control can be performed on the cooling water temperature in the diesel engine test process which does not exceed the dynamometer range of a high-power diesel engine test room in the test room. By using the multi-cylinder diesel engine test room cooling water auxiliary system of the invention, when tests of different-power diesel engine, such as the high-power diesel engine, the medium-power diesel engine and the low-power diesel engine, are performed in the high-power diesel engine test room, accurate control can be performed on the cooling water temperature of the diesel engine can be performed so as to expand the application range of the test room.
Description
technical field [0001] The invention belongs to the technical field of diesel engine testing, and in particular relates to a multi-cylinder diesel engine laboratory cooling water auxiliary system. Background technique [0002] When the diesel engine test workshop encounters a large number of diesel engine test tasks, in order to ensure the test progress, there will often be a high-power diesel engine test room for low-power diesel engine tests. At this time, the cooling water temperature often fluctuates greatly and is difficult to stabilize, which affects the normal conduct of the test. This is because the cooling water auxiliary system equipped in the high-power diesel engine test room has a large heat transfer capacity, and the heat transfer amount during the high-power diesel engine test is also large, so the supporting electric control valve has a large diameter. Opening, controlling the flow of external cooling water can achieve the purpose of controlling the tempera...
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Inventor 张探军贾桢冀树德张伟闫瑞琦
Owner CHINA NORTH ENGINE INST TIANJIN