How to determine whether the H2SH gearbox needs an emergency stop

1、 Temperature emergency stop signal

The temperature of any rolling bearing point instantly exceeds 95 ℃, or the temperature rise rate exceeds 10 ℃ within 1 hour, and the cooling system still cannot control the heating trend at full power operation.

The gearbox oil temperature exceeds 105 ℃, accompanied by lubricating oil smoke and obvious burnt smell, indicating that the oil film is about to completely rupture.

The partial smoking and redness of the bearing end cover, which cannot be touched by hand, indicate that the bearing has entered the critical state of dry friction locking.

2、 Vibration and abnormal noise emergency stop signal

The box exhibits strong resonance, with an overall effective vibration value exceeding 12mm/s. There is visible loosening displacement in the anchor bolts and box connection parts.

Clear metal impact sound, gear tooth breakage sound, or continuous intense scraping and friction sound can be heard from inside the box, and the sound amplifies sharply with the increase of speed.

The amplitude of the sideband of the gear meshing frequency in the vibration spectrum suddenly increases by more than three times, and at the same time, there is an abnormal peak in the characteristic frequency of the bearing, indicating gear tooth fracture or bearing cage fracture.

3、 Oil and seal emergency stop signal

Jet like oil leakage occurs at the joint surface of the shaft seal or housing, and the oil level quickly drops below the lowest mark of the oil gauge in a short period of time, indicating that the lubrication system is about to shut down.

A large amount of visible copper and iron shavings were found in the lubricating oil, and the oil appeared metallic gray, indicating that the gears or bearings had undergone extensive wear and failure.

There is a leak inside the cooler, causing a large amount of cooling water to flow into the oil pool. The oil instantly emulsifies and turns white, completely losing its lubrication carrying capacity.

4、 Emergency stop signal for safety and working conditions

There are significant safety risks such as visible cracks, deformations, or batch fractures of connecting bolts in the gearbox housing, which may cause cracking and component flying out.

There is a significant radial displacement in the input/output shaft, severe shaking in the coupling area, and a risk of fracture and detachment in the shaft system.

There are direct threats to personal safety such as fire and electric leakage in the surrounding area, or the rear load is completely stuck and blocked, and the torque instantly exceeds the rated value by more than 3 times.