Cleverly displacing the gas in the gearbox: When the tractor is working, when the gas pressure in the gearbox rises to a certain extent, it will force the gear oil to seep from the gearbox cover, shift lever hole, etc. In order to discharge the gas in the gearbox in time, drill a 6 mm hole in the top of the gear oil filling hole bolt, and then use a 30-90 mm long hollow copper pipe or iron pipe as a vent pipe. The upper end is bent and the nozzle is down and light. Tap into the hole. Qiqiao Tubing: Copper Tubing material is hard, inconvenient to install, you can use the red flame in the place you need to bend, immediately put it in the water to cool, it will become soft and easy to bend. Check the elasticity of the piston ring: If there is insufficient elasticity of the piston ring, a standard new ring of the same type can be used, placed perpendicularly to the circumference of the old ring being examined, and the openings of both rings are in a horizontal position. Then press the two rings by hand. If the opening of the new ring is not moving, the opening of the old ring has been closed, indicating that the old ring is insufficient in elasticity and should be replaced; if the two rings are opened several times at the same time, the old ring is good in elasticity and can continue to be used. How to quickly and conveniently assemble the piston pin In the manual of the internal combustion engine, the piston heating temperature is set between 75°C and 100°C when assembling the piston, so that the piston pin seat hole swells and becomes a clearance fit with the piston pin so as to smoothly install the piston pin. Into the piston pin. However, when the piston is heated to 75°C to 100°C, it becomes hot when assembled, which has a bad influence on the assembly. At the same time, it consumes a large amount of heat energy and causes waste. In order to assemble the craftsmanship of the market and save energy, we tested the piston of the crawler tractor's 4125 diesel engine (made of eutectic aluminum-silicon alloy) by heating the door. Tests have found that when the piston is heated to 50°C, the minimum bulging mass of its piston pin hole diameter is 0.046 mm and the minimum fit clearance is 0.046 mm. Therefore, when the piston pin of the Model 4125 diesel engine is assembled, the piston can be heated to 50° C. or more, and it is not necessary to make the heating temperature too high. As long as wearing a pair of gloves, grab the piston is not hot, the assembly is quick and easy.
Refers to the trading of minerals in international trade. Minerals in international trade refer to the four major categories of iron ore, non-ferrous metal ores, rare-metal ores and non-metallic Mineral Products.
Mineral classification:
- According to the genesis and formation conditions of mineral resources, it is divided into endogenous minerals, exogenous minerals and metamorphic minerals.
- According to the mineral composition and structural characteristics, is divided into inorganic minerals and organic minerals;
- According to the output status of minerals, it is divided into solid minerals, liquid minerals and gas minerals.
- According to the characteristics of the mineral and its main purpose, it is divided into energy minerals, metal minerals, non-metallic minerals and water and gas minerals.
Our company mainly engaged in
- Ferroalloy ore
- Ferrosilicon
- Silicon manganese
- Graphite oil coke
- Silicon carbide
- Activated carbon.
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