Switched Reluctance Motor Drilling Rig Magnetic Coupling

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Solution Overview

Problem

Conventional drilling and bolting rigs in rock surfaces face inefficiencies due to reliance on hydraulic power, which is heavy, complex, and requires multiple fluid connections, limiting their compactness and operational flexibility.

Innovation Solution

The development of a drilling and bolting machine that utilizes a magnetic coupling system with a switched reluctance motor and a chuck for driving a drill element, allowing for both hydraulic and electrical power operation, and incorporating a compact design with internal fluid passageways and electric actuators to reduce weight and complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If hydraulic power systems are used in conventional drilling and bolting rigs, then sufficient power can be delivered, but the system becomes heavy, complex, and requires multiple fluid connections

Engineering Contradiction:

Improvepower deliveryVSAvoidsystem complexity

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The patent replaces the hydraulic mechanical power transmission system with an electromagnetic motor system. The motor is directly coupled to the chuck, eliminating the need for hydraulic fluid connections, hoses, and mechanical power transmission components. This substitution reduces system complexity while maintaining power delivery capability through direct electromagnetic-to-mechanical energy conversion.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts and removes the hydraulic power system components from the drilling and bolting rig. By eliminating the hydraulic pump, fluid reservoir, hoses, and associated control valves, the system complexity is reduced. The motor is positioned within the carriage and directly drives the chuck, taking out the intermediate hydraulic transmission elements.

Inventive Principle:

Principle #2Taking out (Extraction)

2Power

If hydraulic power systems with multiple fluid connections are used, then power can be transmitted, but compactness and operational flexibility are limited

Engineering Contradiction:

Improvepower transmissionVSAvoidsystem compactness

Core Design Contradiction:

PowerVSVolume of moving object

Solution Approach 1:

The patent substitutes the bulky hydraulic fluid transmission system with a compact electromagnetic motor. The motor integrates power generation and transmission within a single unit mounted in the carriage, eliminating the need for extensive fluid connections and reservoirs. This directly improves system compactness while maintaining full power transmission capability for drilling operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If conventional hydraulic systems are used, then drilling and bolting operations can be performed, but weight and structural complexity increase

Engineering Contradiction:

Improveoperational capabilityVSAvoidrig weight

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The patent replaces the heavy hydraulic system with a lighter electromagnetic motor system. The motor is directly coupled to the chuck, eliminating the weight of hydraulic fluid, pump mechanisms, and associated hardware. This weight reduction improves ease of operation by reducing the overall mass of the drilling and bolting rig while maintaining full operational capability for rock drilling and bolting tasks.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 enhances operational efficiency by providing a more compact, lightweight, and flexible drilling and bolting system capable of precise control without external sensors, improving penetration rates and reducing the risk of jamming, while eliminating the need for extensive fluid connections.

Implementation Method 1

The actuator includes a magnet exerting a magnetic force on the block to provide magnetic coupling between the actuator and the block

Methodology Applied

Scientific EffectMagnetic force: Magnetism

Implementation Method 2

The drive unit includes a switched reluctance motor and a chuck for driving the drill element. The switched reluctance motor includes a stator and a rotor supported for rotation relative to the stator

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Data Source

PatentUS11078790B2Electric drilling and bolting device

Publication Date: 2021.08.03 JOY GLOBAL UNDERGROUND MINING LLC

AI summary

A drilling and bolting device for driving a drill element into a rock surface includes a frame, a drive unit supported for movement relative to the frame, and an actuator for moving the drive unit relative to the frame. The drive unit includes a motor and a chuck for engaging the drill element. The chuck is driven by the motor. In some aspects, the actuator includes a magnet exerting a magnetic force on the block to provide magnetic coupling between the actuator and a block supporting the motor. In some aspects, the actuator is positioned at least partially within an elongated member of the frame. In some aspects, the drive unit includes a switched reluctance motor including a stator and a rotor supported for rotation relative to the stator, and the rotor is directly coupled to the chuck.