Feed Roll Flute Assembly Mounts Prevent Bolt Slippage

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Solution Overview

Problem

Existing feed rolls with replaceable flute inserts experience bolt slippage and increased wear due to strong forces, leading to displacement and damage, as well as friction and wear between flute elements and the roll surface.

Innovation Solution

The design incorporates complementing sets of mounts with seats that securely engage and support replaceable flute elements, featuring a base and backing portion that define a seat to constrain motion in multiple directions, with threaded holes for secure attachment, and serrated teeth for traction, ensuring stable positioning and force transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If replaceable flute inserts are bolted to anchors welded to the roll, then the flutes can be replaced and positioned to bear against the roll surface, but strong forces cause bolts to slip and flute inserts to displace outward

Engineering Contradiction:

Improvereplaceability of flute insertsVSAvoidstability of flute insert position

Core Design Contradiction:

Ease of repairVSReliability

Solution Approach 1:

The flute assembly is divided into separate components: a mount element fixed to the roll and a replaceable flute insert. This segmentation allows the flute insert to be easily replaced while the mount remains permanently attached, resolving the contradiction between replaceability and stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mount element acts as an intermediary between the roll and the flute insert. It provides a stable mounting structure with a seat that receives the flute insert, preventing direct bolt slippage while maintaining secure attachment. The mount element distributes forces and prevents the flute insert from displacing outward under strong operational forces.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Force

If flute inserts are positioned to bear directly against the roll surface, then radial forces are reduced on bolts, but friction and wear occur between the flute elements and roll surface

Engineering Contradiction:

Improveradial force on boltsVSAvoidfriction and wear between flute and roll surface

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The mount element serves as a mediator that separates the flute insert from direct contact with the roll surface. The base portion of the mount contacts the roll surface, while the flute insert remains positioned within the seat. This eliminates friction and wear between the flute and roll surface while still allowing the flute to bear radial forces through the mount structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If bolt holes are made oblong to accommodate position variations in anchors, then flute inserts can be positioned to bear against the roll, but bolts may slip under strong forces

Engineering Contradiction:

Improvetolerance for anchor position variationsVSAvoidprevention of bolt slippage

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The mount element acts as an intermediary that decouples the anchor positioning from the flute insert positioning. The mount is fixed to the roll with anchors, and the seat is designed to receive the flute insert with precise positioning. This intermediary structure maintains adaptability to anchor position variations while preventing bolt slippage by providing a stable, precise mounting interface.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The mount element is pre-fixed to the roll surface with anchors in a stable position. The seat is designed in advance with precise dimensions and positioning features that ensure proper alignment of the flute insert. This preliminary action eliminates the need for oblong bolt holes and prevents bolt slippage by establishing a rigid, pre-positioned mounting structure.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11872719B2Feed rolls having flute assemblies of matingly engageable mounts and flute insert elements

Publication Date: 2024.01.16 WEBCO MILL SUPPLY LTD

AI summary

A feed roll comprises a roll having a rotary axis, flutes fixed on the roll, mounts fixed on the roll between the flutes, each mount having a seat spaced apart from the outer surface of the roll and replaceable flute elements detachably and matingly engaged in the seats of respective mounts and extending outward beyond the mounts. The replaceable flute insert element comprises an elongated plate body having an inner longitudinal edge, an outer longitudinal edge, and a backing face extending between the inner longitudinal edge and the outer longitudinal edge and the inner longitudinal edge and the backing face configured to matingly engage the seat of the mount. The flute insert element further comprises the outer longitudinal edge being formed with a traction element and the plate body having a plurality of bolt holes therethrough for registering with the bolt holes of the mount element when the plate body and the seat are matingly engaged.