Roll Neck Bearing Mounting With Dual-Function Annular Cylinder
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Solution Overview
Problem
Existing devices for mounting and removing bearings from roll necks, particularly in roll stands for rolling metal strip, face issues with stability and wear due to the transmission of axial forces, and require complex mechanisms for retraction of pistons.
Innovation Solution
A device where the annular cylinder functions as both piston/cylinder units, allowing for direct transmission of axial forces through the nut and stop ring, eliminating the need for bolts and enabling easy retraction of the outer piston using a positioning pressure chamber, thus providing maximum stability and minimizing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If axial forces are transmitted through bolts and complex mechanisms, then the bearing can be mounted and removed, but stability decreases and wear increases
Solution Approach 1:
The patent combines the mounting and removal functions into a single integrated device. The annular cylinder serves dual purposes: it mounts the bearing during installation and removes it during maintenance. This eliminates the need for separate complex mechanisms for each operation, thereby improving stability while reducing overall device complexity.
Solution Approach 2:
The annular cylinder is designed as a multi-functional component that performs multiple operations. It acts as both a mounting tool and a removal tool, and also serves as a positioning element. This universal design eliminates the need for multiple specialized components, reducing complexity while maintaining high reliability through direct force transmission.
2Reliability
If axial forces are transmitted through bolts, then the bearing can be secured, but wear increases and stability decreases
Solution Approach 1:
The patent extracts the bolts from the force transmission path. Instead of using bolts to transmit axial forces between the cylinder and the bearing, the design creates a direct contact interface. The annular cylinder bears directly against the bearing outer ring, eliminating bolt-related wear and improving stability through direct force transmission.
Solution Approach 2:
The patent introduces a direct contact interface as an intermediary between the cylinder and bearing. This contact interface serves as the mediator for force transmission, replacing the bolt connection. The direct bearing contact allows axial forces to be transmitted without the intermediate bolts that cause wear, thereby improving stability and reducing harmful wear effects.
3Ease of operation
If springs are used for piston retraction, then the piston can be retracted, but space requirements increase
Solution Approach 1:
The patent uses a positioning pressure chamber that operates on pneumatic or hydraulic principles to retract the piston. By introducing pressure medium into the positioning pressure chamber, the piston is automatically retracted without requiring mechanical springs. This eliminates the need for large-volume spring mechanisms while maintaining ease of operation, thereby reducing space requirements.
Solution Approach 2:
The patent changes the operational parameter from mechanical spring force to fluid pressure. By controlling the pressure medium in the positioning pressure chamber, the piston retraction is achieved through parameter control rather than mechanical compression. This allows for compact design with reduced space requirements while maintaining ease of operation through pressure control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures maximum stability and minimal wear during rolling operations by directly transmitting forces from the cylinder to the nut, and allows for easy removal of the bearing with reduced space requirements and low pressure, enhancing operational efficiency.
Implementation Method 1
a positioning pressure chamber 3 that can be formed, delimited in the axial direction by the outer piston and the annular cylinder, advantageously enables a simple retraction of the outer piston in the axial direction away from the roll body
Data Source
AI summary
The invention relates to a device and a method for mounting a bearing 200 on a roll neck and for removing the bearing from the roll neck of a roll. Known devices of this type have a first and a second piston/cylinder unit. They also have a stop ring 130, fixed in the axial direction A at the end of the roll neck 320 remote from the body, which acts as a stop for the inner piston 110 of the first piston/cylinder unit. In addition, the known devices have a nut 150 which can be screwed onto an external thread of the inner piston to secure the bearing 200 in the axial direction, in particular during a rolling operation. As an alternative to the known prior art, the present invention provides that an annular cylinder 120 serves both as a cylinder for the first piston/cylinder unit and as a cylinder for the second piston/cylinder unit. For its function as a cylinder for the second piston/cylinder unit, said annular cylinder is covered to a certain ex ent on its side remote from the body by an annular cylinder cover 122. The cylinder cover 122 serves, together with an outer flange 142 of an outer piston 140, to axially delimit a removal pressure chamber 2 of the second piston/cylinder unit.