Throwing Wheel Blade Locking Mechanism for Shot-Locking Prevention
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Solution Overview
Problem
Centrifugal blasting machine blades are prone to 'shot-locking' due to abrasive and dust accumulation, requiring maintenance to remove them, which results in lost operating time and necessitates secure yet easy replacement without special tools.
Innovation Solution
The design incorporates throwing blades with two locking members that are detachably coupled to a double-sided runnerhead assembly, featuring tapered locking members and recesses to prevent jamming and facilitate easy removal and replacement, reducing the risk of shot-locking and minimizing tool requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blades are securely mounted to resist centrifugal forces, then reliability is improved, but ease of removal and replacement deteriorates
Solution Approach 1:
The locking mechanism is segmented into multiple discrete locking members (at least two) distributed around the blade perimeter, allowing individual engagement and disengagement. This segmentation enables the blade to be securely held during operation while allowing systematic removal by releasing locks in sequence, resolving the contradiction between secure mounting and ease of replacement.
Solution Approach 2:
The locking members are designed to be dynamically adjustable between engaged and disengaged states. During operation, the locks are engaged to secure the blade against centrifugal forces. During maintenance, the locks can be easily disengaged to allow blade removal. This dynamic state change capability resolves the contradiction by providing different operational modes for different phases of use.
2Ease of operation
If blades are easily removable for maintenance, then ease of operation is improved, but reliability deteriorates due to potential shot-locking
Solution Approach 1:
The harmful factor of shot-locking is extracted and isolated from the main blade mounting interface. The locking members are designed with features that prevent abrasive and dust accumulation in the locking mechanism itself, separating the critical locking function from the abrasive environment. This allows easy blade removal while maintaining reliability by preventing shot-locking at the locking interface.
Solution Approach 2:
The locking members act as intermediaries between the blade and the runnerhead assembly. They provide a controlled interface that facilitates easy blade removal while protecting against shot-locking through their specific design features. The intermediaries transfer the blade securing function while isolating the blade mounting system from abrasive contamination that causes shot-locking.
3Reliability
If multiple locking members are used to secure blades, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking members are designed as simple, inexpensive components that can be easily manufactured and replaced if needed. By using simple lock designs rather than complex mechanical systems, the patent achieves reliable blade securing through redundancy (multiple locks) while keeping individual lock complexity low. This resolves the contradiction by using multiple simple components rather than a single complex mechanism.
4Reliability
If special tools are used for blade removal, then reliability of locking is improved, but ease of operation deteriorates
Solution Approach 1:
The locking members are designed to be self-servicing, allowing blade removal without special tools. The locks can be manually engaged and disengaged using simple hand operations, eliminating the need for specialized removal tools. This self-service capability maintains locking integrity through proper mechanical engagement while greatly improving ease of operation by allowing maintenance personnel to service blades with basic hand tools only.
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 solution allows for quick and secure attachment and detachment of blades, reducing maintenance time and preventing jamming, thereby enhancing operational efficiency and reducing downtime due to shot-locking issues.
Implementation Method 1
Each locking member may include a top end, a bottom end, a front surface, and two front-side surfaces. The front surface may be tapered at an angle in a first plane... The front-side surfaces may be tapered at an angle in a second plane that is perpendicular to the first plane
Implementation Method 2
They must also be held securely so that they resist the tremendous centrifugal forces exerted on them when the wheel is operating
Data Source
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AI summary
A vane of a throwing wheel apparatus including a particle throwing portion, extending between first and second ends, having a first throwing face, a second throwing face, and two side edges. Each of the side edges extend substantially parallel to one another and includes a locking member adapted to be detachably coupled to a mounting element of the throwing wheel apparatus. Each locking member includes a first taper in a first plane and a second taper in a second plane. The first plane is substantially perpendicular to each side edge of the vane and the second plane is substantially parallel to the first taper. The side edges define a width smaller than a predetermined distance between first and second mounting elements of the throwing wheel apparatus so that when coupled to the mounting elements a gap is present on both sides of the vane.