Wire Saw Deflection Roller Sealing for Independent Rotation
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Solution Overview
Problem
Deflection rollers in wire saws face high loading and require independent rotational speed adjustment to prevent damage from saw wires, while also needing effective sealing to protect against dust and water ingress.
Innovation Solution
The design incorporates a sealing element that allows for a weak coupling between adjacent deflection rollers, reducing wear and allowing for different rotational speeds without damaging the rollers. The sealing element is positioned to minimize loading, ensuring protection of the rotary bearings within a continuous tube formed by the wheels and sealing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing element contacts both stationary and rotating elements to seal each rotary bearing individually, then good sealing is achieved, but the sealing element experiences high wear due to high rotational speed
Solution Approach 1:
The sealing system is divided into two distinct parts: a stationary sealing element fixed to the housing that seals against the stationary axle, and a rotating sealing ring attached to the deflection roller that seals against the stationary sealing element. This segmentation allows the stationary sealing element to maintain reliable sealing without experiencing wear from rotational motion, as the wear is transferred to the replaceable rotating sealing ring.
Solution Approach 2:
Instead of having the sealing element rotate with the deflection roller (which would cause wear), the patent inverts the arrangement by fixing the sealing element to the stationary housing and allowing a separate sealing ring on the roller to rotate against it. This inversion transfers the wear from the stationary sealing element to the rotating sealing ring, which can be easily replaced.
2Adaptability or versatility
If deflection rollers rotate at different rotational speeds to adapt to saw wire running speed, then the saw wire is protected from damage, but the sealing element experiences increased loading
Solution Approach 1:
The sealing system is segmented into stationary and rotating components, where the stationary sealing element experiences minimal force as it only seals against the rotating sealing ring rather than directly against the high-speed rotating deflection roller. This segmentation reduces the loading on the stationary sealing element while maintaining the ability of deflection rollers to rotate at different speeds.
3Adaptability or versatility
If the sealing element is designed to seal each rotary bearing individually, then complete independence of deflection rollers is achieved, but the device complexity increases
Solution Approach 1:
The stationary sealing element serves multiple functions: it seals against the axle, seals against the rotating sealing ring of each deflection roller, and provides a mounting surface for the sealing rings. This multi-functionality reduces the need for additional sealing components, thereby reducing overall device complexity while maintaining complete independence of deflection rollers.
Data Source
AI summary
A deflection roller (32) for a deflection roller package (33) of a wire saw (1), having a wheel (32), a pivot bearing (42) and a sealing element (55). The wheel (32) has a raceway (45) along the periphery thereof for guiding a saw wire (3) of the wire saw (1). The pivot bearing (42) is coaxially inserted in the wheel (32). An outer sleeve (51) protrudes from a lateral surface (49) of the wheel (32). An inner sleeve (50) protrudes from a lateral surface opposite the one lateral surface (49). A radius (53) of the inner sleeve (50) is smaller than a radius (52) of the outer sleeve (51). The sealing element (55) is placed on the outer sleeve (51) or inserted into the inner sleeve (50).