AIRSUSTECH Air Springs Assembly Cross OEM No. Twthill 1998301 Double Convoluted Industrial Air Shocks

ALTERNATIVE NO

Twthill 1998301

Histeer 10316

Watson&Chalin AS-0089

Watson&Chalin AS 0089

Watson&Chalin AS0089

Reyco 19983-01 (21AR,74AR)

Goodyear 2B14-383

Goodyear 2B14 383

Goodyear 2B14383

Goodyear 578923356

Firestone W01-358-7557

Firestone W01 358 7557

Firestone W013587557

Firestone WO1-358-7557

Firestone WO1 358 7557

Firestone WO13587557

Firestone w01-358-7557

Firestone w01 358 7557

Firestone w01 358 7557

Firestone w013587557

Contitech FD 530-35 530

Contitech FD 530 35 530

Contitech FD530-35 530

Contitech FD530 35 530

Triangle 6412

Triangle 4530

Specifications and Detailed Technical Parameters: 2B7557

Nut/blind nut

Top plate screw (nut) teeth: M18×1.5, M12×1.75

Screw (nut) teeth of the bottom cover plate: 2×M12×1.75

Air hole/air inlet/air fittings

Air hole/air inlet: 1/4NPT

The air hole/air inlet is combined with the screw nut

Cover plate

Top plate diameter: 289 mm

Bottom cover diameter: 289mm

The screw center distance of the bottom: 158mm

Bell rubber bellows

Rubber Bellow Diameter: 353mm

Stroke: 104mm to 391mm

Bumper block/bumper block

With bumper block

Belt loop/Belt loop

With one piece of belt loop

Min. pressure: 0 bar

Return force to min.height: ≤400N

Overall weight with clamped plates: 7.7kg

Vibration isolation - dynamic characteristic values

Design Height H: recommended 285mm, minimum 265mm

Pneumatic application-static characteristic values

Force F[KN]

Locking and unlocking systems for airbags

1. Airbag locking system If the airbag is not connected to the air source to control the height or has no air valve device, it is called a locking system. The system uses a fixed amount of gas as the elastic medium. A certain amount of gas is enclosed in the system, and the amount of gas remains unchanged under pressure and rebound.

2. Unlocking system of airbags
Unlocked systems for airbags are the most commonly used today. The air bag is connected to the air source through a height control or other air valve device, which is called an unlocked system. Whether at rest or under pressure, the bladder maintains relatively the same volume at the design operating height. Under the fixed condition of the height valve, the load force and elastic coefficient change with the change of the pressure of the fixed gas. With this system, the additional pressurized gas maintains the height of the air bag even as the air bag load changes. In this way, in the case of changes in load, since the system can keep the volume of the airbag unchanged, the natural vibration is more stable than the locking system. In short, the natural vibration frequency of the system will not change when the load changes.

Advantages of airbags
1. The elastic coefficient of spring expansion can be controlled;
2. Adjustable load carrying capacity;
3. Easy to achieve height control;
4. Reduce friction;
5. The load changes, but the natural frequency is basically unchanged.