What is the muffler principle of the muffler?
The muffler's muffler principle is to use porous sound-absorbing materials to reduce noise, which is the principle of a resistive muffler. The sound-absorbing material is fixed on the inner wall of the airflow channel or arranged in a pipe in a certain manner to form a resistive muffler. When the sound wave enters the resistive muffler, a part of the sound energy rubs in the pores of the porous material and is converted into thermal energy to be dissipated, which weakens the sound wave passing through the muffler. A resistive muffler is like a purely resistive electrical circuit, and sound-absorbing materials are similar to resistors.
Standardization of hot-pressed elbows in the pipe fittings industry
At the drafting meeting of thin-walled stainless steel pipes and fittings standards organized by the Standardization Technical Committee of Accessories for Hot-Pressed Elbow Fittings, experts from the China Institute of Architectural Design and Research and some representatives of stainless steel pipe manufacturers responded to GB / T91228.1 "Three national standards including GB / T91228.2" Thin-walled stainless steel pipe for connection of stainless steel pipe fittings "and GB / T91228.3" 0-shaped seal ring for stainless steel snap-fit pipe fittings "were discussed, and the revision of relevant standards was reached Consensus: the outer diameter series of more than 12 stainless steel pipes currently on the market in our country will be unified into 2 basic standard sizes, and the wall thickness of the pipes will be unified into 1 basic size; the new standard will also standardize the meaning of snap-fit pipe fittings, Unify the key dimensions of pressure-fitting pipe fittings and provide a uniform pipe outer diameter basis for the future application of different metal materials (such as carbon steel, copper and stainless steel) on pressure-fitting pipe fittings. Some experts participating in the hot-pressed elbow believed that the revision of the new national standard for thin-walled stainless steel pipes and the introduction of the national standard for "Stainless Steel Pipes and Fittings Connection and Installation Specifications" will make the product standards for stainless steel pipes and fittings and the pipe fittings installation and installation specifications The accurate docking of standards will make up for the previous regrets that there were only national-level stainless steel pipe product standards and no national-level stainless steel pipe installation specifications; it will end the history of non-standard references in stainless steel pipe standards for construction in China; Standardization and high efficiency in the construction of building pipelines bring new changes. Moreover, Binhai Pipe Fittings Co., Ltd. integrates the production and sales of straight seam welded pipes, seamless steel pipe fittings, spiral steel pipes and other products. The various steel pipe fittings produced are produced in accordance with national standards and meet quality assurance. They have received praise and favor from customers.
Reasonable design of exhaust duct muffler
The mass of air in the exhaust pipe muffler pipe is equivalent to the electrical inductance and resistance, which is called sound mass and sound resistance. The volume of air in the cell is equivalent to the electrical capacitance and is called sound compliance. Similar to electrical filters, each cell with a tube has its own natural frequency. When sound waves containing various frequency components enter the first short tube, only certain frequency sound waves near the natural frequency of the first mesh can pass through the mesh to reach the second short tube mouth, while other frequencies Sound waves cannot pass through the mesh. It can only reflect back and forth in the small room, so we call this structure that has a filtering function for sound waves an acoustic filter. Select appropriate tubes and chambers for combination. You can filter out noise of certain frequency components.
Diesel generator exhaust muffler materials should be sturdy and durable
Diesel generator exhaust muffler materials should be sturdy and durable. For special requirements such as high temperature resistance, corrosion resistance, humidity resistance, dust resistance, etc., special attention should be paid to the choice of materials and structures; for high pressure resistant mufflers (such as high pressure exhaust mufflers), It should be produced by the unit that obtained the pressure vessel production license. In addition, the muffler should be small in size, light in weight, simple in structure, and convenient for processing, installation and maintenance. Aerodynamic performance The resistance of the muffler to the air flow should be small and the resistance coefficient should be low, that is, the pressure loss or power loss increased after the muffler is installed should be controlled within the practically acceptable range. The airflow regeneration noise generated when the airflow passes the muffler should be low and should not affect the normal operation of the aerodynamic equipment.
Silencers are widely used in thermal power plants and chemical companies
The muffler is widely used in thermal power plants and chemical companies. The vented muffler is relatively compact in structure. The muffler is made of stainless steel and is not easy to corrode. The muffler has a large volume and low steel consumption. It has a small size, light weight, high strength, The muffler is separately fixed, which can meet the requirements of the thermal displacement of the pipeline. At the same time, it can absorb the vertical and horizontal thermal displacement of the exhaust pipe to ensure the safety of the exhaust pipe in the hot state. It is a significant effect to control the exhaust Vent the noise muffler equipment. The installation of the muffler does not affect the displacement of the safety valve and the take-off of the safety valve. It can perform quantitative acoustic calculations to ensure safety and effectiveness.