Spring-Loaded Terminal Block Set Screw for Wire Settlement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In large-scale computing systems, multi-strand power wires tend to settle due to heat fluctuations and vibration, leading to reduced contact pressure with set screws, increased electrical resistance, and potential fire hazards, necessitating frequent maintenance to re-torque set screws, which is time-consuming and costly.
Innovation Solution
The use of compensating set screws with a spring-loaded plunger mechanism that maintains contact pressure with multi-strand power wires by allowing the plunger to follow the wire as it settles, ensuring consistent electrical connection through the action of a spring mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-strand power wires are hardwired to terminal blocks with set screws, then electrical connection is established, but the wires settle over time due to heat fluctuations and vibration, reducing contact pressure and increasing electrical resistance
Solution Approach 1:
The set screw assembly is transformed from a static fastening mechanism to a dynamic compensating mechanism. The spring-loaded plunger allows the contact interface to dynamically adjust and follow wire settlement, maintaining consistent contact pressure despite changes in wire position due to heat fluctuations and vibration over time.
Solution Approach 2:
The contact pressure parameter is changed from a fixed value (determined by initial set screw tightening) to a variable parameter that automatically adjusts. The spring mechanism enables the contact pressure to change in response to wire settlement, ensuring the parameter remains within the optimal range for reliable electrical connection throughout the operational lifecycle.
2Reliability
If set screws are used to secure multi-strand power wires, then wires are held in place, but frequent maintenance is required to re-torque set screws due to settling, which is time-consuming and costly
Solution Approach 1:
The spring-loaded plunger mechanism provides self-service functionality by automatically compensating for wire settlement without requiring external intervention. The mechanism self-adjusts the contact pressure as the wire settles, eliminating the need for periodic manual re-torquing of set screws and significantly reducing maintenance time and costs.
Solution Approach 2:
The spring mechanism ensures continuous contact pressure compensation throughout the operational life of the electrical connection. Instead of providing intermittent maintenance through periodic re-torquing, the spring-loaded system continuously adapts to wire settlement, maintaining reliable electrical connection without interruption to system operation.
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 compensating set screws effectively maintain contact pressure with power wires, reducing the risk of increased resistance and fires, minimizing downtime and maintenance costs by continuously securing the wires without the need for frequent re-torqueing.
Implementation Method 1
The set screw comprises a spring mechanism configured to maintain contact pressure on the power wire
Implementation Method 2
allowing the plunger to follow the wire as it settles, ensuring consistent electrical connection
Data Source
AI summary
A computing system includes one or more terminal blocks for terminating power wires, which may be used for delivering power to or distributing power within the computing system. A set screw is provided for each terminal block, with the set screw configured to hold a wire in the terminal block. At least one of the set screws is a compensating set screw. The compensating set screw has a set screw head, a set screw stem, a plunger movable along the stem, a spring mechanism between the head and the plunger, and a retainer to retain the plunger on the stem. The spring mechanism may push the plunger toward the wire, causing the plunger to follow the wire and maintaining pressure between the plunger and the power wire even as the power wire settles over time.