On a flat road, you can hear the "gurgling" sound in the front of the vehicle, which is intensified when turning sharply. When stopping for inspection, press and hold the front of the vehicle firmly to make it bounce up and down, and the abnormal noise occurs. The greater the force, the greater the noise.
Diagnosis 1: The shock absorber is damaged due to oil leakage due to improper maintenance when the vehicle is usually driven on bad roads. Solution: In this case, repair or replace it according to the severity of the damage.
2. Oil leaks from the oil seal on the upper part of the main body of the electric butterfly valve. Once the electric butterfly valve moves, the oil drops more severely. Diagnosis II: The oil seal is damaged due to the damage of the piston rod or foreign matters, which results in the loss of sealing performance. Solution: In this case, we recommend replacing new parts or new shock absorbers.
3. When starting or braking, the body bumps violently up and down, which makes the passengers feel unstable. Vibration and noise reduction should be the focus of product design.
1. For example, in the design of loaders, the two-way damping suspension system can overcome the resonance, noise and fatigue damage to the power system between the power transmission system and the frame of the whole machine;
2. The central swing structure of the rear axle can make the swing center of the rear axle coincide with the power input center, which can effectively reduce the vibration and noise caused by the constant impact of the additional torque on the transmission system, and avoid the noise caused by the impact of various parts of the whole machine on the uneven road.
In addition to selecting low-noise engines, some targeted improvements can also be made to the structural layout of the main engine or the structural design of the system.
1. For example, the cooling fan can no longer be directly driven by the engine, but can be driven by the hydraulic motor alone, which is convenient to isolate the fan from the engine and seal the whole engine, so that the noise cannot be transmitted to the outside through the fan outlet, reducing the impact of noise on the environment;
2. The noise generated by the vibration of hydraulic oil pump, valve throttling and oil pipe vibration is reduced by optimizing the arrangement of hydraulic pipes;
3. Sound absorption and sound insulation materials can be designed and pasted at the hood and other covers;
4. The fully sealed integral cab, sealed valves, sound insulation and noise reduction can be designed, which truly reflects the design purpose of "people-oriented".
Nowadays, shock absorber has become an indispensable part of all kinds of household appliances and engines. It solves the problem of vibration and noise generated by such equipment when it works, so that the equipment can work without being affected by vibration and reduce its service life, and people can work or rest more safely.