In winter, the temperature is low, and the cylinder head of diesel engine is prone to leakage. The main reasons are as follows:

The cylinder cover (Cylinder Head) engine cover and cylinder parts closed, including the water jacket and the valve and the cooling fins.

Valve body material according to different process media, the use of different materials. Commonly used materials are: cast iron, cast steel, stainless steel, carbon steel, plastic, copper, etc..

Compressor, the low pressure gas to enhance the pressure of a high pressure gas driven fluid machinery, is the heart of the refrigeration system. It is of low temperature and low pressure refrigerant gas suction pipe from the suction

Once the surface of the casting is loose, shrinkage is a waste. Loose first may be caused by the irrational structure. Sparse. Loose, shrinkage and shrinkage as produce a thick wall. In large regions, even in the concave part

After heat treatment of gray cast iron can only change the matrix structure, can not change the shape of graphite. So it is impossible to improve the mechanical properties of gray cast iron.

Experimental study on cotton picker America began from 1850, but over a period of 100 years of slow progress. In 1949, the mechanization degree of cotton harvest was only 6%. To cultivate suitable for mechanized cotton varieties from 30s onwards, the vari

The development of agricultural machinery has a direct connection with the economic conditions of the country and the country. In developed countries, especially in the agricultural labor force in the few American agricultural machinery, to continue to de

Gray iron castings retest condition is if the first test results can not meet the requirements of the mechanical properties of the material, allowed to repeat the test, how to test whether it is effective.