Fatigue life test of high pressure steel wire braided hose时间：2022-05-17浏览次数：1454
Today, with the transformation of science and technology to the mode of productivity, the pattern of world industrial production is still undergoing great changes.High pressure steel wire braided hoseAs a common product in the mechanical field, it is widely used in loaders, excavators, rollers, forklifts, hydraulic cranes and other equipment. In recent years, due to the increasing demand for oil, mining, agriculture and industry, there is a great demand for high-pressure steel wire braided hose products that can adapt to the environment and meet the needs of industrial production.
High pressure steel wire braided hose is mainly used in coal, petroleum and other industries to transport liquids with a certain temperature and pressure. In order to understand the product performance of high pressure steel wire braided hose, manufacturers and quality inspection units need to set up a certain pressure and temperature control environment to make the tested piece reach the actual working state, carry out fatigue life test, and determine the product performance. The test method is as follows:
1. PTM series hose pulse testing machine
PTM series hose pulse testing machine adopts automatic servo control system, which can set the pulse pressure, pulse frequency, test times and pulse waveform by itself, and has the function of automatic shutdown protection after the equipment sample is damaged. The main components are imported parts, which are safe and reliable; The interface dynamically displays the test data, draws the real-time pressure waveform, generates the test report and prints it.
2. BTM series hose burst tester
The invention can meet the high and low pressure requirements of bursting pressure of 0.01~350mpa rubber hose, and can carry out pressure resistance, pressure resistance and bursting tests on high-pressure manifold, high-pressure bare pipe and pipe joint. There are more than ten pressurization control methods, which can meet the requirements of different pipe diameters, pressures, pressurization rates and curves.
In addition to the safe and reliable product quality, the selection of appropriate hose products according to the use requirements is also an important factor to ensure the safety and rationality of the whole system. When selecting high-pressure steel wire braided hose, pay attention to the following points:
1. Select the number of steel wire layers of rubber hose according to the system pressure. The higher the pressure, the more steel wire layers. The working pressure of each hose is very high, and the bursting pressure of the hose is 4 times that of the large working pressure. Therefore, according to the actual system pressure, the large working pressure of the selected hose can be slightly higher than the actual working pressure.
2. Choose the inner diameter of the hose according to the flow rate. If the pipe diameter is too small, it will increase the flow of medium in the pipe, heat up the system, reduce efficiency, produce excessive pressure drop, and affect the performance of the whole system. The pipe diameter is too large to increase the cost, so the inner diameter of the hose should be appropriate. When fixing the hose with a pipe clamp or the hose passes through a gasket (such as a steel plate), pay attention to the outer diameter of the hose.
When selecting high-pressure steel wire braided hose, pay attention to the bending radius, and subtract the crimping length of the front joint when calculating the bending radius. If the bending radius of the installed hose is too small, the pressure bearing capacity of the hose will be reduced, and the service life will also be affected.