Vertical Shaft Impact Crusher Accelerating Member Design
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Solution Overview
Problem
Existing accelerating members in vertical shaft impact crushers suffer from premature wear, irregular wear patterns, and high maintenance costs due to the wash-out of hard metal insert members, leading to reduced useful lifetime and increased downtime.
Innovation Solution
A composite accelerating member design with a base member of strong metal alloy and highly wear-resistant insert members, split along vertically and horizontally directed separation joints, creating a multiple accelerating face with a polygonal configuration that interrupts continuity of base material sections, preventing wear concentration and facilitating easy exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If hard metal insert members are used to increase wear resistance, then useful lifetime is extended, but manufacturing complexity and cost increase
Solution Approach 1:
The accelerating member is divided into a base member and separate insert members that can be independently manufactured and then assembled. This segmentation allows each component to be optimized separately - the base member for structural integrity and the insert members for wear resistance - thereby extending useful lifetime while managing manufacturing complexity through modular construction
Solution Approach 2:
The accelerating member combines different materials with complementary properties: a base material (such as steel or cast iron) providing structural strength and toughness, and hard metal insert members (such as cemented carbide) providing exceptional wear resistance. This composite construction resolves the contradiction by integrating materials that excel in different properties, achieving both extended lifetime and manageable manufacturing through specialized component production
2Reliability
If insert members are continuously cast into base material to prevent wash-out, then wear resistance improves, but manufacturing complexity increases
Solution Approach 1:
Instead of continuously casting insert members into the base material, the invention separates the insert members as distinct components that are attached to the base member. This segmentation prevents wash-out by providing mechanical retention through attachment mechanisms while simplifying manufacturing by allowing insert members to be produced separately using optimized processes for hard materials
Solution Approach 2:
An attachment mechanism serves as an intermediary between the insert members and the base member, providing a reliable connection that prevents wash-out without requiring complex continuous casting processes. This intermediary element simplifies manufacturing by enabling separate production of components while ensuring their secure assembly in operation
3Strength
If accelerating members are made heavy to withstand dynamic loading, then strength improves, but handling weight and exchange difficulty increase
Solution Approach 1:
The accelerating member is segmented into a base member and insert members that can be handled separately. The base member is designed to withstand dynamic loading with optimized material selection and structural design, while the lighter insert members can be easily exchanged. This segmentation reduces the handling weight during maintenance operations while maintaining the overall strength required for dynamic loading through the base member's design
4Duration of action of moving object
If insert members are arranged in continuous patterns to maximize wear resistance, then useful lifetime increases, but wear concentration and irregular wear patterns occur
Solution Approach 1:
The insert members are arranged in an asymmetric pattern rather than a continuous uniform pattern. This asymmetric arrangement disrupts the flow of abrasive material and prevents the formation of concentrated wear channels, distributing wear more uniformly across the accelerating face. The pattern is designed to maximize the utilization of hard metal material while maintaining reliability by avoiding wear concentration that would lead to irregular wear patterns
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
The design achieves a prolonged useful lifetime, maintains constant acceleration performance, and reduces handling weight and manufacturing complexity, maximizing the utilization of insert members while minimizing wear and maintenance costs.
Implementation Method 1
accelerating of the particle material with the aid of centrifugal force along a radially directed accelerating face, to be thrown at high velocity from the rotor
Data Source
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Figure 6
AI summary
The present invention may be regarded as to present a constructional design for an accelerating member for a vertical shaft impact crusher provided with an acceleration face constructed partly of base material sections and partly highly wear resistant insert members, such that development of an irregular wear pattern is avoided and premature wash-out and consequently breaking away of insert members is prevented, or at least hindered and the insert members are maximally utilized, which accelerating parts are easy to manufacture, may limit lifting weight to a maximum of 10-20 kg, and are provided with a simple attachment arrangement for very easy and quick exchange.