What is the emergency solution for NGW-L71-8 planetary gearbox base cracking

When the NGW-L71-8 planetary gearbox base cracks, the steps of "stopping for safety → temporary reinforcement → risk investigation → permanent repair" should be taken immediately to avoid the expansion of cracks, which may cause the gearbox to vibrate more severely, the shaft system to shift, or even the equipment to be scrapped. The specific emergency measures are as follows:
1、 Step 1: Immediately shut down and cut off the source of risk
After the base cracks, the vibration generated by the operation of the gearbox will continue to impact the cracked area, which may cause the crack to rapidly extend (such as developing from a local crack to a penetrating crack), and even cause overall deformation of the base and displacement of the gearbox. Therefore, it is necessary to
First time shutdown
：

Cut off the power supply of the reducer (such as disconnecting the motor control cabinet switch), and hang a warning sign saying "Equipment failure, no starting" to prevent accidental operation and startup;

If the reducer is connected to a load (such as a conveyor belt, fan, pump body), the power supply of the load equipment should be cut off synchronously to avoid additional tension or pressure on the reducer caused by the load, which will exacerbate the stress on the base.

2、 Step 2: Temporary reinforcement to limit crack propagation
After shutdown, temporary support and reinforcement should be provided to the cracked base to prevent the cracks from further expanding under the self weight and residual stress of the equipment, and to buy time for subsequent repairs
1. Support the reducer body to reduce the stress on the base

If the cracked part of the base bears a large load (such as below the output end of the reducer), use a jack and steel plate (the steel plate should be placed between the jack and the reducer base to avoid local pressure damage) to lift the reducer body, temporarily "unloading" the cracked base;

The selection of the jack should match the weight of the reducer (NGW-L71-8 reducer weighs about 50-80kg per unit, 1-2 tons of manual jack can be selected), and the lifting height should be "no obvious force deformation at the cracked base", and excessive lifting should not cause misalignment of the shaft system.

2. Strengthen the cracked base to prevent crack propagation

For local small cracks (crack width<0.5mm, no penetration): Use angle steel (such as L50 × 5 angle steel) or steel plate (thickness 8-12mm) to fit the surface of the base on both sides of the crack, and fix the reinforcement on the base with expansion bolts (bolt specifications need to match the strength of the base concrete, such as M12-M16) to form a "clamp type" constraint and limit the crack opening;