Construction Vehicle Tire Center Groove Heat Dissipation
Solution Overview
Problem
Construction vehicle tires experience significant temperature rises at the tread portion due to degraded heat generation properties, especially with larger tire sizes and increased load demands, leading to potential heat separation issues.
Innovation Solution
The implementation of deep equatorial grooves in the tire center portion, with depths ranging from 70% to 110% of lug groove depths and widths between 5 mm to 20 mm, enhances heat radiation by allowing air to flow along the groove bottom regions, effectively cooling the tire center and suppressing temperature rises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tread volume is increased and tread gauge is increased to improve stiffness at the land region, then wear resistance is improved, but temperature rise in the tread portion increases due to degraded heat generation property
Solution Approach 1:
The invention divides the tread portion into multiple land regions separated by circumferential grooves. This segmentation allows heat to be dissipated through the grooves while maintaining sufficient tread volume in each land region for wear resistance and stiffness.
Solution Approach 2:
The invention applies different properties to different parts of the tread: the land regions maintain high tread volume for wear resistance and stiffness, while the circumferential grooves provide heat dissipation pathways. This local differentiation resolves the contradiction between heat retention for wear resistance and heat dissipation for temperature control.
2Stability of the object's composition
If tread volume is increased to decrease negative ratio, then stiffness at land region is improved, but heat radiation area is reduced, causing temperature rise
Solution Approach 1:
The invention adds a circumferential dimension for heat radiation by creating grooves that extend around the tire. This allows heat dissipation in the circumferential direction without reducing the radial tread volume, thus maintaining negative ratio while increasing heat radiation area.
3Temperature
If shallow circumferential grooves are provided to increase heat radiation area, then temperature rise is suppressed, but tread volume decreases and stiffness at land region is lowered
Solution Approach 1:
The invention optimizes the parameters of the circumferential grooves, specifically controlling the groove depth to be 5mm to 20mm and the groove width to be 30mm to 50mm. These parameter changes allow sufficient heat radiation while minimizing the reduction in tread volume and maintaining land region stiffness.
4Temperature
If deep grooves are formed in tire center portion, then heat radiation is improved and temperature rise is suppressed, but tread gauge thickness is reduced
Solution Approach 1:
The invention applies different groove depths to different regions: deep equatorial grooves (70%-110% of lug groove depth) at the tire center for maximum heat radiation, and shallower circumferential grooves at the shoulders. This local differentiation allows effective heat dissipation at the hottest center region while preserving sufficient tread gauge for overall structural integrity.
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 design improves heat radiation properties and effectively reduces temperature rises at the tire center, maintaining wear resistance and preventing issues like heat separation while ensuring practical tread gauge thickness.
Implementation Method 1
air stream is admitted to flow along the bottom region of the grooves at the higher temperature, it would be possible to radiate the heat highly efficiently
Implementation Method 2
radiate the heat highly efficiently
Data Source
AI summary
A construction vehicle tire, in which a temperature rise at the tread portion is suppressed by enhancing the heat radiation property at the tire center portion (C). Lug grooves (22) are arranged in the tread shoulder regions (S) on both sides in the tire width direction. The tire center portion (C) is formed with narrow grooves (24) extending substantially in the tire width direction (V) and having both ends terminating within the tread. A deep equatorial groove (26) extends in the tire circumferential direction on the tire equatorial plane (CL), and has a maximum depth within the range of from 70% to 110% of the depth of the lug grooves (22), so as to efficiently cool the bottom region (26B) of the deep equatorial groove (26) at high temperature.