Installation method of slewing bearing

Installation method of slewing bearing

Slewing bearing is a kind of large bearing often used in modern machinery and equipment, which can bear large axial, radial and overturning moments at the same time. At the same time, it is also an important component in the rotary system of large-scale amusement facilities, which bears various loads during the operation of the equipment.

In addition to calculation and selection, attention must also be paid to its correct installation slewing bearing and use.

The harm caused by installation errors and improper use to amusement facilities cannot be ignored. So how to install the slewing bearing of amusement facilities? The following editor will introduce to you the installation method of the slewing bearing of large amusement facilities.
​​
The motion forms of amusement facilities mainly include rotary motion, linear motion and compound motion of rotary and linear motion. Among them, rotary motion is the main motion form of amusement equipment, such as carousel, automatic control plane and high-altitude flying, etc. The main component to realize rotary motion is slewing bearing.

1.Installation form of slewing bearing of amusement facilities

In the field of amusement equipment, there are two types of installation methods for slewing bearings: horizontal installation and vertical installation of slewing bearing.
​​
The operating characteristics of flying towers and self-controlled aircraft amusement facilities are that they rotate around the central axis.

Flying tower-type amusement facilities include high-altitude flying, shaking head flying chair, etc., and self-control aircraft amusement facilities include self-control plane, big octopus, etc. The installation form of the slewing bearing in this type of equipment is horizontal installation.
​​
Sightseeing car amusement facilities are characterized by rotating or swinging around the horizontal axis. Sightseeing car amusement facilities include wild shouts, large pendulums, etc. The installation form of the slewing bearing in this type of equipment is vertical installation.

2.Installation of slewing bearing

​​1. Before installing the slewing bearing, check the mating surface and clean the two installation surfaces to avoid any solvent from contacting the sealing belt or entering the raceway. Do not paint the sealing belt.
​​
2. The parts of the slewing bearing mounting seat should have sufficient rigidity, the contact surface of the bearing must be cleaned, there should be no lubricating oil and must be kept dry,

and the mating surface should be machined to ensure that the two mating surfaces and the two ends of the slewing bearing are in the entire Complete contact on the circumference to meet the flatness and inclination required by the relevant standards.
​​
3. The bolts selected for the slewing bearing are high-strength bolts, and the length of the installation bolts shall not be less than 5d (d is the thread diameter).
​​
4. For the connection of the slewing bearing of the amusement equipment, high-strength bolts above 8.8 are used, and full-threaded bolts cannot be used. The anti-loosening method is the double-nut method.

The two nuts should be the same. It is not high to cause extrusion plastic deformation, which is conducive to maintaining the reliability of preload.

Since the spring washer will destroy the centrality of the bolt’s force, reduce the pressure area and rigidity of the nut on the connecting parts when passing through, and reduce the connection strength of the bolt. Under any circumstances, spring washers should not be used.
​​
5. When installing slewing bearing, firstly position the slewing bearing radially, and then tighten the installation bolts crosswise, that is, use star-shaped installation, and carry out symmetrically and continuously in the 180° direction, and then re-tighten it again to ensure that the bolts on the circumference have the same pre-tightening.

force, and check the rotation of the turntable slewing bearing. In order to increase the reliability of the connection, the prestress of the tightened bolt should be 70% of the yield strength of the bolt material.
​​
6. In order to ensure the stable rotation of the turntable installation of slewing bearing , the gears should be checked before the installation bolts are fully tightened. The minimum value of the tooth side clearance is generally 0.03 ~ 0.04 X m (module). , recheck the gear tooth clearance of the pinion on the entire circumference.
​​
The above is the explanation of the installation method of slewing bearings for large amusement facilities.

Luoyang LYMC Bearing is a comprehensive entity enterprise integrating design, research and development, production, sales and service. Products are widely used in new energy, medical, amusement, automation, lifting, construction, mining, metallurgy, ports, textiles, ships, environmental protection, aerospace, wind power and other fields. In addition, it also implements personalized optimized design and customized flexible production for different customers to meet customer needs.