The seven hazards of high temperature of hydraulic grab bucket
Pageviews： Release Time：2017-11-21
The high temperature of the hydraulic grab is caused by the unreasonable design of the hydraulic system, or the technical backwardness is not perfect.
The principle of electric hydraulic grab is to use electric energy to do the work by hydraulic system, so as to realize the opening and closing of the grab, so as to achieve the purpose of loading and unloading goods.
By the temperature conditions, electric hydraulic grab unreasonable design, in the capture material, once the material resistance is greater than the bucket digging force, grab catch up although material, in the material heap "suffocated", but still grab the motor rotation, even motor "blocking", in order to protect the hydraulic system you, are equipped with pressure relief valve, when the pump through the overflow valve pressure relief, sudden temperature rise. Energy is conserved, electric energy becomes heat energy, and oil is heated.
By the temperature condition two, electric hydraulic bucket design is not reasonable, in the loading and unloading operations, due to the experience of the operator or the line of sight and other factors, to hold the handle in the closed grab, grab that closed (often happened), then grab the motor still rotates, motor "blocking", the hydraulic pump through the pressure relief valve overflow, sudden temperature rise. The energy is conserved, and the electric energy becomes heat energy, heating the oil.
Rising oil temperature not only wastes energy, but also produces the following hazards:
1. grab work can not be tested and unsafe. The sharp rise in oil temperature, hydraulic oil viscosity, the volumetric efficiency and the hydraulic system working efficiency decreased, increased leakage, pressure lose, light grasping force become smaller or catch up the goods, or goods of poor reliability, grab the air crash, not safety.
2. influence production. As a result of the above 1, the user has to stop to cool down the oil temperature of the grab, thereby affecting the efficiency of the loading and unloading.
The 3. parts of the hydraulic system because of overheating and inflation, destroyed the gap with their normal relative movement of parts, resulting in increased friction, hydraulic valve is easily blocked, at the same time, the lubricating oil film thinning, mechanical wear, surface with precision result of pump, valve, motor etc. because of premature wear and its failure or scrap.
4., vaporization of oil and water evaporation, easy to cause cavitation corrosion of hydraulic components; oil oxidation formation of gelatinous deposits, easy to plug oil filters and hydraulic valve in the small hole, so that the hydraulic system can not work properly.
5., to accelerate the aging of rubber seals, shorten life, and even lose its sealing performance, so that the hydraulic system serious leakage.
6., the oil temperature is too high will accelerate the deterioration of hydraulic oil, oil life expectancy becomes shorter
7., the grab rate is higher and the maintenance cost is increased. High oil temperature will seriously affect the normal use of the machine, reduce the service life of hydraulic components, high failure rate and increase maintenance costs.
