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First, the five advantages of high and low temperature impact testing machine 1. Reliable safety performance.
High and low temperature impact testing machines have been UL-accredited in the United States and matured in the United States, Canada, Mexico, and other countries for 40 years. There have never been any problems. Impact test box is based on the introduction of advanced technology in the United States, independent research and development and has a number of patents, has a number of domestic authorities inspection and testing, with reliable security.
2, good electrical conductivity.
Sino-US alloy cable is a new type of alloy cable processed through a special process by adding China's unique rare earth and copper, iron, silicon and other elements, and its conductivity is 62% of copper. After a special process, the section of the alloy conductor is increased by 1.28-1.5 times, so that the cable's ampacity and voltage drop are equivalent to those of the copper cable, and the "new material is replaced by the alloy".
3, excellent anti-corrosion properties.
A dense oxide layer is formed immediately upon contact with high temperature air. This oxide layer is particularly resistant to various forms of corrosion and therefore has the characteristics to withstand the harshest environments. In addition, the internal structure of the alloy conductor is optimized, and the silane cross-linked polyethylene is used. The application of insulating material makes the service life of the alloy cable longer than the copper cable by more than 10 years.
4, superior mechanical properties.
High-low temperature impact testing machine has 40% smaller rebound performance than copper cable and 25% higher flexibility. It has very good bending performance. The laying radius is far less than that of copper cable, making it easier to lay and connect terminals; special formula and heat treatment process The creep of the conductor under heat and pressure is greatly reduced, making the electrical connection of the alloy cable as stable as the copper cable.
5, economic performance savings.
Under the premise of achieving the same electrical performance, the direct purchase cost of the high-low temperature impact test box is 20% to 30% lower than that of the copper cable. Since the weight is only half that of the copper cable and it has good mechanical performance, the use of the alloy cable can be reduced. Transportation and installation costs, general construction save installation and construction costs more than 20%, large-span buildings can save more than 40%. The use of high and low temperature impact test chambers will have an inestimable impact on building a conservation-minded society.
Second, high and low temperature impact test machine noise solution
1. Absorption of high-low temperature impact tester is one of the main reasons for the high noise of hydraulic pump. When the oil is mixed with air, cavitation is easily formed in the high pressure area and propagates in the form of pressure waves, causing the oil to oscillate and cause the system to generate cavitation noise. The main reasons are:
1) If the oil filter or inlet pipe of the hydraulic pump is clogged or the viscosity of the oil is too high, the degree of vacuum at the inlet of the pump may be too high to allow air to infiltrate.
2) Damage to the oil seal of the shaft end of the hydraulic pump or pilot pump, or poor seal of the oil inlet pipe, causing air to enter.
3) The oil level of the fuel tank is too low, so that the hydraulic pump inlet pipe directly sucks air.
When there is a high noise in the work of the hydraulic pump, the above-mentioned parts should be checked first, and the problems found should be handled in time.
2. The internal components of the high-low temperature impact tester are excessively worn. For example, the cylinder body of the plunger pump and the fittings of the flow plate, the plunger and the plunger hole are worn and strained, causing serious leakage in the hydraulic pump, when the hydraulic pump outputs high pressure. When a small amount of oil flows, it will generate a flow pulsation, causing higher noise. At this time, the declination of the pilot system variable mechanism can be appropriately increased to improve the influence of internal leakage on the pump output flow. The servo valve spool of the hydraulic pump and the piston controlling the flow rate will also be subject to localized wear and tear, causing the piston to pulsate during the movement, resulting in fluctuations in the output flow and pressure of the hydraulic pump, thereby generating large vibration and noise at the pump outlet. . At this point, components that are worn or severely damaged may be brush plated or replaced.
3, hydraulic pump with a flow plate is also one of the important components that easily lead to noise. When the high-low temperature impact tester is used, the surface is worn or the sludge is deposited on the opening of the relief groove, which will cause the relief groove to become shorter and change the unloading position, resulting in trapped oil phenomenon, which in turn causes higher noise. In the normal repair process, the unloading groove may also be shortened due to the flat disc worn by the flat grinding. At this time, if it is not properly slender in time, it will also generate a large amount of noise. During the assembly process, the large unloading tank of the valve plate must be installed in the high pressure chamber of the pump, and the direction of its sharp corners must be opposite to the rotation direction of the cylinder. Otherwise, it will also bring more noise to the system.
Varieties available: Galvanized ( hot-dipped & electro ) and PVC coated
Five advantages of high and low temperature impact testing machine development and solution to excessive noise
High-low temperature impact testing machine is suitable for electronics, auto parts, metals, chemical materials, plastics and other industries, testing the repeated resistance of various materials to high and low temperature, and testing the physical damage or chemical change caused by the product's thermal expansion and contraction. To confirm the quality of a product, from precision ICs to heavy mechanical components, no one needs its approval.