Adjustable roller bearings for elevators are mainly used in the following scenarios due to their automatic centering, high load-bearing capacity, and low vibration characteristics:
High speed elevator traction machine spindle
Core requirements: High speed elevators (such as super high-rise building elevators) require extremely high stability and safety of the drive system.
Bearing function: Spherical roller bearings reduce vibration and noise during operation by optimizing kinematic design and low friction torque, while bearing bidirectional axial loads, ensuring the stability of the spindle under high-speed rotation.
. For example, the Tokyo Sky Tree elevator uses low-noise, low vibration self-aligning roller bearings, with a running height of 464.4 meters, which improves speed and ride comfort.Heavy duty elevator transmission system
Core requirement: Freight elevators or large passenger elevators need to withstand huge loads, and may cause shaft deflection due to cargo imbalance.
.Bearing function: The automatic centering function of self-aligning roller bearings can compensate for shaft deformation and installation errors, avoid additional stress caused by poor alignment, and extend system life.
. Its high radial load-bearing capacity (such as an increase of 20% -35% in the rated load of E-type bearings) is suitable for heavy-duty scenarios.Modular elevator system
Core requirement: Modular design requires bearings to adapt to different installation conditions (such as optical axis, step shaft).
.Bearing function: Conical bore self-aligning roller bearings (such as CCK type) can be matched with tightening sleeves and retraction sleeves to simplify the installation process. At the same time, W33 oil groove design optimizes lubrication and reduces maintenance frequency, making them suitable for elevator shaft environments with limited lubrication.
.High temperature resistant elevator components
Core requirement: Local high temperature environments in elevator machine rooms or shafts (such as summer in southern regions) may affect bearing performance.
.Bearing function: Some self-aligning roller bearings are made of high-temperature resistant materials (such as SIAIF brand bearings that can withstand 300 ℃ -500 ℃), combined with a sealing structure to prevent impurities from entering, ensuring stable operation at high temperatures.
.Application of long shaft or flexible crankshaft
Core requirement: The traction machine spindle of super high-rise elevators is relatively long, which is prone to deflection due to its own weight or load.
.Bearing function: The self-aligning roller bearing allows the inner and outer rings to tilt relative to each other by 1 ° -2.5 °, automatically compensates for shaft bending, avoids bearing damage caused by centering errors, and improves system reliability.
.Typical Application Case
Tokyo Sky Tree Elevator: Using NSK low-noise self-aligning roller bearings, operating at a height of 634 meters, improving speed and safety.
.Mine/metallurgical elevator: In high temperature and heavy load environments such as steel rolling machines and continuous casting machines, self-aligning roller bearings (such as 23020CA/W33 type) extend their service life through high temperature resistant design and lubrication optimization. Modular freight elevator: Conical hole bearings (such as 20000CCK type) are matched with clamping sleeves to achieve quick installation and adapt to different shaft diameters, reducing maintenance costs.