Calender Roller Bearing Block Assembly With Three-Direction Preload
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Solution Overview
Problem
Existing bearing block assemblies fail to adequately support calender rolls when processing hard materials like lithium nickel manganese cobalt oxide (NMC), leading to insufficient support, increased vibration, and wear.
Innovation Solution
A bearing block assembly design that applies a preload force to calender rolls, distributing it through multiple bearings in three opposing directions, reducing play and vibration, and enhancing stiffness by using a housing with angled contact surfaces and preload access ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bearing block assemblies are used to support calender rolls, then the structure is simple and easy to manufacture, but the bearing support is insufficient when calendering hard materials like NMC
Solution Approach 1:
The bearing block assembly is divided into multiple independent bearing blocks (first bearing block, second bearing block, third bearing block) each with specific functions. The first and second bearing blocks support the calender roll in horizontal directions, while the third bearing block applies preload force vertically. This segmentation allows each component to be optimized for its specific function, improving overall bearing support capability without creating an unmanageably complex assembly.
Solution Approach 2:
The invention transitions from traditional single-direction or two-direction bearing support to three-dimensional multi-directional support. The bearing blocks are arranged to provide support forces in multiple directions (horizontal and vertical), creating a three-dimensional support system that adequately handles the complex load patterns when calendering hard materials like NMC.
2Stability of the object's composition
If multiple bearing blocks are used to distribute load in three directions, then bearing play and vibration are reduced, but the device complexity increases
Solution Approach 1:
Multiple bearing blocks and their supporting structures are merged into a single integrated housing. The housing contains all bearing blocks, contact surfaces, and preload application mechanisms as one unified component assembly. This merging reduces the number of separate parts, simplifies installation and maintenance, while still providing multi-directional load distribution and vibration reduction.
Solution Approach 2:
The housing serves multiple functions simultaneously: it supports the calender roll, applies preload force to bearings, provides structural rigidity, and houses all bearing blocks. The angled contact surfaces within the housing both support the bearing blocks and transmit preload forces. This multi-functionality reduces the need for separate components, achieving bearing stability without proportionally increasing device complexity.
3Duration of action of stationary object
If preload force is applied to bearings, then bearing life is extended and material quality improves, but the manufacturing complexity increases due to preload access ports and force applicators
Solution Approach 1:
The bearing blocks are pre-loaded with axial forces through the preload application mechanism before the calender roll begins operation. This preliminary action eliminates bearing play and ensures optimal bearing contact from the start of operation. The preload access ports and force applicators are designed into the housing structure, allowing preload to be applied during assembly or initial setup rather than requiring complex ongoing adjustment mechanisms.
Solution Approach 2:
The angled contact surfaces within the housing act as intermediaries that transmit the preload force from the third bearing block to the first and second bearing blocks. Rather than directly applying complex preload mechanisms to each bearing, the contact surfaces mediate the force distribution, simplifying the overall manufacturing process while still achieving the desired preload effect on all bearings.
4Force
If bearing blocks are disposed at angles to distribute load, then load distribution in multiple directions is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The housing is designed with specific local features including angled contact surfaces at predetermined angles and strategically positioned bearing block locations. These local geometric features are precisely manufactured to ensure proper load distribution angles, while the rest of the housing maintains standard manufacturing tolerances. This localized precision approach minimizes overall manufacturing complexity while achieving the required load distribution capability.
Data Source
Figure 1
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Figure 2B
AI summary
A bearing block assembly for supporting a calender roll having a housing including a preload access port, a base surface, and a first side and a second side. A first contact surface on the first side extends from the base surface at a first angle, and a second contact surface on the second side extends from the base surface at a second angle. Within the housing is a first bearing block having a first bearing block surface and a first bearing bore, a second bearing block having a second bearing block surface and a second bearing bore, and a third bearing block having a preload surface and a third bearing bore. The first bearing block surface is disposed over the first contact surface, the second bearing block surface is disposed over the second contact surface, and the preload surface is positioned between the preload access port and the base surface.