Before and after the beginning of winter, there is a strong cold air to the south, and the sudden drop in temperature is often accompanied by bad weather such as strong winds and cooling, which often makes the condition of heart disease and hypertension worse.
Therefore, during the beginning of winter, you should avoid going out in the windy weather, not staying outdoors for a long time, not eating cold drinks, and adding or removing clothes in a timely manner, “early to bed and get up lateâ€. Moderate exercise, preferably after 90 o'clock in the morning or 4 o'clock in the afternoon, the amount of exercise is not fatigue, avoid strenuous exercise or local exercise. The diet should be far away (white sugar, salt, lard), nearly three blacks (black sesame, mushrooms, black rice). Onions, marine fish, milk, tomatoes, kelp, soybeans, garlic, corn, oats, walnuts, chestnuts, celery, chrysanthemums, eggs, and wolfberry tea are 15 kinds of foods currently recommended by experts for the prevention and treatment of cardiovascular diseases, and have a protective effect on the heart. Seasonal changes, when the cold is approaching, more foods can be selected. Defecation is often the cause of cardiovascular events, usually should eat more fruits, vegetables and other fiber-rich foods to maintain smooth stool.
The piston is one of the main moving parts of the
engine, is composed of combustion chamber components.
The pressure of the gas
piston through the connecting rod to the crankshaft, realize the change from
heat energy to mechanical energy.
The work condition is very bad, and the
temperature of 1400-1800 DEG C, and pressure
Up to 13MPa above the gas
contact, greatly alternating thermal stress and mechanical stress.
And by the
serious corrosion of gas, and under the condition of boundary lubrication and
cylinder wall friction and strong impact 1 times.
The piston in high
temperature, high pressure, strong corrosive gas contact so that it has enough
strength and hardness,
Heat resistance and good thermal resistance, high
fatigue strength and corrosion resistance. For high speed diesel Engine Piston
also requires light as far as possible.
In order to reduce the inertia
force.
Marine piston large low speed diesel engine of the crosshead is
usually combined.
The heat treatment process by normalizing and annealing,
and iron pearlite are ferrite organization, has good heat resistance.
Piston
alloy quenched and tempered steel has better heat resistance and corrosion
resistance. The skirt with nodular cast iron annealing treatment, with good wear
resistance.
Engine Piston Parts,Engine Parts ,Car Engine Parts,Parts Of Engine,Piston Engine Parts
ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com