The mechanical automobile simulation test bench later developed a mechanical automobile simulation test bench to test the entire product. Using a gear-chain drive, the wheel drum garden is divided into six zones at equal intervals. Tiles may be placed on each zone, and the shape of the tiles is also complicated. Placed on the drum is a trolley or two-axle car. Correctly simulating vibration requires not only that the simulation station generates a random vibration that is consistent with the actual distribution in the amplitude domain, but also that the acceleration power spectral density map is consistent with the experimental conditions, which is simply not possible on a simple mechanical simulation platform. By adjusting the rotation speed, the shape and placement of the tiles on the drum, the load on the trailer, and the following five indicators are consistent with the actual measurements, the field transport test environment was considered to be moved to the laboratory simulation. The five indicators are: (1) The average value (mathematical expectation) of the peak value (or valley value) of the random variable recorded by the simulation table is equivalent to the actual measurement. (2) The first-order moment (variance) test of the peak is equivalent to the actual measurement. (1), (2) Two, indicating that the simulated peak random variables are in the same distribution as the actual measurements. (3) The main frequency range on the acceleration power spectrum is comparable to the actual measurement. (4) Power spectral density values ​​at the main frequency) G1(f) and G2(f), the test is equivalent to the actual measurement. (3), (4) Two, indicating that the energy concentration in the main frequency range is consistent. (5) The rms acceleration of the acceleration time history is comparable to that of the actual measurement. This shows that the total power of the simulation table to the test specimen is consistent with the actual measurement. Due to the lack of mathematical descriptions between the above five indicators and the debugging parameters, there is a lot of blindness in the process of debugging and debugging, and the workload is large. It is often the case that this indicator satisfies, while the other indicator is not satisfied. Pre-insulated Pipe Fabrication
Pre-insulated, pre-fabricated jacketed piping system is used for industrial and commercial applications. Pre-Insulated, pre-jacketed thermal pipe has a definite advantage over field installed insulation and jacketing. All straight sections of the factory preinsulated piping system shall be jacketed with a High Density Polyethylene (HDPE) jacket conforming to ASTM D1248,PVC jackets shall not be allowed.
All field butt joints shall be made in straight sections of pipe.here for welding polyethylene, it can use field hdpe pipe Butt Fusion Machines according to pipe range. For PE Pre-insulated pipe fabrication, It will use workshop fitting machines for bend fabrication of plastics. How it works? Firstly you need to prepare pe pipe Angle Cutting Saw and fix thin pipe on sepcial clamp, and then cut hdpe pre-insulated pipe in required angle. Then move this pipe and fix them on elbow clamps of pre-insulated fitting welding equipment. Special half heating plates positioned on top of the welding zone are used to ensure the required welding temperature, The appication of uniform welding pressure which is controlled hydraulically, ensures the quality of the weld between the sleeve and the pipe casing. The welding phases of pipe fabrication are below: 1. Approaching and preheating 2: Heating 3.Removing the heating element 4. Reaching the welding pressure 5.Welding 6. Cooling
Pre-Insulated Pipe Fabrication,Custom Pipe Fabrication,Pipeline Fabrication,Butt Fusion Welding Machine WUXI MEIERTE MACHINERY TECHNOLOGY CO.,LTD , https://www.wxpipefusionweldings.com