slewing gear factory

1.Introduction and selection of grease used in slewing gear and slewing drive

We all know that when the slewing bearing and the slewing drive are used, they need to be regularly filled with grease, and they cannot be used without lubrication, otherwise the slewing gear and the slewing drive will be damaged. The slewing bearing and slewing drive products of Fuji Transmission have been filled with grease before leaving the factory.

We choose to use Mobilux EP2 grease. People who often buy grease know that there are many brands of grease on the market, and the quality is uneven. , Counterfeit grease is emerging in an endless stream, so you must buy grease from big brands through regular channels.

If you add counterfeit grease, it will also cause damage to the slewing gear slewing drive. Our Mobilux EP2 grease is produced by Mobil official website authorized dealers to buy, to ensure the quality of the grease.

Why did we choose Mobilux EP2 grease for slewing rings and slewing drives? Mobilux grease EP series grades 0, 1, 2, 3, 004, 023 are a series of high-performance greases, four of which are general-purpose industrial greases and two are special-purpose semi-fluid greases. These lithium hydroxystearate greases provide superior protection against wear, rust and water washout.

Mobilux EP Series greases 0, 1, 2, and 3 are suitable for most types of industrial applications, including heavy duty applications with high specific pressure or shock loads. These greases offer excellent resistance to rust and corrosion, as well as water washout, making them ideal for equipment that is often exposed to wet conditions.

1. Mobilux greases EP0 and 1 have good low temperature pumpability and are suitable for centralized lubrication systems and other applications requiring low temperature performance.

2. Mobilux EP2 and 3 are general-purpose greases, recommended for multi-purpose use of anti-friction bearings and plain bearings, bushings and pins under normal working conditions. The recommended application temperature is in the range of -20℃ to 130℃, but Higher temperatures can also be used if the frequency of grease addition is increased accordingly.

3. Mobilux grease EP004 and Mobilux grease EP023 are especially suitable for the lubrication of enclosed gears and bearings in gearboxes with poor sealing in underground mining machinery, except for motor drives, and are also suitable for many other applications due to wear and tear Or industrial applications where there is a lack of seals to hold common gear oils in the gearbox or chain case.

The recommended application temperature range for Mobilux EP004 is -25 to 120°C, and the recommended temperature range for Mobilux EP023 is -15 to 120°C.

Mobilux EP series greases have long been recognized as high performance, exhibiting good performance in corrosion protection, low temperature pumpability and high temperature service life, they have good ability to withstand loads and extreme pressures.

Reduce wear under heavy load or shock load and vibration load, good equipment reliability, high utilization rate, good anti-rust and anti-corrosion and anti-water wash performance, can protect equipment and provide good lubrication in the case of water ingress, prolong bearing Service life in wet environments, reducing bearing replacement costs and unplanned downtime.

2.Why do not use elastic washers for the mounting bolts of the slewing gear?

The installation and operation instructions of the slewing gear tell you that elastic washers cannot be used when installing the connecting bolts of the slewing gear, so what effect will the elastic washer have on the slewing bearing? Why can’t elastic washers, which are widely used on other mechanical equipment, be used on slewing bearings? Let’s take a look at why.

First, we must first understand the function of the elastic washer. The elastic washer has a certain elasticity, which can prevent the bolts and nuts from loosening and falling off during the use of the equipment. It is suitable for many mechanical equipment with vibration. However, the slewing gear generally bears a large load, so the strength requirements of the bolts are relatively high.

Usually, grade 10.9 bolts and nuts are used. The high-strength bolt connection mainly relies on the frictional resistance between the bolt and the connected parts to achieve locking. Unlike ordinary bolts, which can be prevented from loosening by elastic washers, the use of thread tightening glue for the bolts of slewing bearings is the correct anti-loosening measure.

Second, the slewing bearing does not use elastic washers to prevent the deformation of the slewing gear. The contact area of ​​the elastic washer is not as large as that of the flat washer. Under the action of the large pre-tightening force, the flat washer is not reliable, and the larger pre-tightening force of the bolt may be It causes plastic deformation of the slewing bearing mounting surface in contact with the spring washer.

With the increase of use time, the deformation will become larger and larger, the pre-tightening force of the bolt will become smaller, and the bolt will loosen. The slewing bearing is usually subjected to overturning force. The overturning force during operation will aggravate the plastic deformation of the slewing gear mounting surface, and may also cause the elastic washer to open, resulting in rapid damage to the bolt and the slewing bearing.

Third, a suitable flat washer can increase the contact area between the bolt and the slewing bearing, preventing the plastic deformation of the contact surface of the slewing bearing when the bolt is pre-tightened by the workpiece with insufficient hardness. Due to the increase in the contact area during the use of the slewing bearing Bolted connections maintain high reliability under overturning forces and shock loads.

Through the above analysis, we have come to the following conclusions: elastic washers cannot be used during the installation of the slewing bearing, and a suitable flat washer can be selected. When installing the bolts, it is necessary to tighten the bolts according to the pre-tightening torque specified in the manual. The use of thread tightening glue can prevent the bolts. loose.