History of exhaust muffler

With the development of exhaust muffler market in China, the application and research and development of core production technology will become the focus of the industry. 

This article contains the following:

• Development history

• Design Construction

Development history 

Early exhaust muffler inhibitors were created by several inventors in the early 20th century or so. American inventor Helem Patsy Maxim was recorded as inventing and selling the first commercially successful models in about 1902. Mark qin gave his device a trademark called mark qin silencer. Later, the exhaust muffler, which was widely used in internal combustion engines, produced an internal combustion silencer, still known in Britain as a silencer. Silencer calls have since faded out of the gun industry, replaced by more accurate term noise suppressors or simply suppressors. Silencers are popular names that have been used in press publishing and in non-technical applications, technically inaccurate but historically first used. 

The suppressor was first introduced to the United States Army Air Force (USAAF) before World War II. Special agents at the Office of Strategic Services (OSS), the CIA's predecessor, enjoyed the new design during World War II. 22LR's High Standard HDM Pistol. Adding a sound suppressor to the barrel of the gun absorbs 90% of the shooting noise. William Joseph Donovan, the director of the Strategic Services, demonstrated the handgun for President Roosevelt during a visit to the White House. While the President was dictating a letter, Donovan fired ten shots at a sandbag without disturbing the President. 

Design Construction 

1.Overview 

Typically, a suppressor is a hollow cylindrical object made of a metal car that can be attached to the muzzle of a pistol or rifle. Some other exhaust mufflers are designed as an integrated part of a weapon that may include a gas expansion bin partially encased outside the barrel (this type is often referred to as a "monolithic" design, see the multi-section shrink old-fashioned telescope). The outer housing of the suppressor is often called a tank. 

The suppressor reduces noise by simply changing the direction of the rapidly expanding gas produced by the explosion of ammunition or by being introduced into a bunch of hollow silos. The guided gas expands and cools, weakening the pressure and speed as it leaves the suppressor. The separation between the above bins is called a baffle or wipe, see below. There are usually at least four or more bins in the inhibitor that can reach 15 bins, depending on the purpose of use and design details. The engineering design of modern suppressors is mathematically similar to the design of electronic filters, and many of the same techniques are indeed included in the design of both. 

Usually, there is a separate, larger expansion chamber near the muzzle, which is used to significantly expand the advancing gas, thereby reducing the speed of the bulk of the gas prior to encountering the block or wipe part of the suppressor. 

The size and effect of different exhaust muffler inhibitors are very different. A disposable type suppressor, developed by the US Navy in the 1980s for 9mm pistols, is 150 x 45 mm (5.9 x 1.77 inches) in size and can be used to suppress the firing of six rounds of standard munitions, or up to 30 rounds of low-powered subsonic munitions. The UK's Sterling suppressor, which is 350 mm (13.78 inches) long and 75 mm (2.95 inches) in diameter, can be effectively used to suppress the launch of hundreds of standard munitions.

2.Silencer 

The suppressor cannot completely eliminate the sound of gun firing.  Even a subsonic warhead makes a distinctly discernible sound as it hits the target through the air. A supersonic warhead produces a sonic boom that causes a loud blast. During the semi-automatic gun movement, the exit of the empty shell will also be clear noise when filling in the new projectile. 

Some suppressors are super-strong to eliminate muzzle bursts, but to be honest the sound of the gun's movement and the sound of the warhead can be as loud or even more so than the muzzle burst that the suppressor has leaked. These suppressors are often inaccurately referred to as silencers; however, they do not completely eliminate the other sounds they make when shooting. 

The very good effect of the suppressor will have a large overall volume, or moderately large volume plus many resistors or wipes. It's also possible to design small, tightly fitted suppressors with a good mute effect for handguns; these suppressors have a life span of only four to five shots and generally don't exceed a few clips. Larger non-grab (only block) handguns or rifle suppressors can have a longer life (hundreds or thousands of shots), but are relatively large, clumsy and heavy. 

Most exhaust muffler inhibitors are designed at a slight cost to the sound suppression performance in ex-change for total volume and weight reduction, which still has obvious tactical utility. The optimal balance of any special design depends on the design use of the suppressor.