Introduction
As an efficient and reliable continuous conveying method, belt conveying is widely used in various industrial production processes. Flat belts, as one of the important types, play a crucial role in ensuring normal operation and preventing belt skewing. This article focuses on the maximum tension calculation method for flat belts without anti-runaway ribs.
II. Relationship between belt tension and friction force
The belt tension is the key factor in maintaining the friction force between the belt and the driving wheel. The friction force allows the belt to tightly adhere to the driving wheel surface,从而实现动力的传递。 When the belt tension is insufficient, the friction force decreases, and the belt is prone to slipping; when the belt tension is too high, it may cause excessive wear or even belt breakage. Therefore,合理的计算平皮带的最大张力至关重要。
III. Maximum tension calculation formula derivation
For flat belts without anti-runaway ribs, we can derive the maximum tension calculation formula based on material mechanics and friction mechanics. First, we need to consider the tensile strength and bending stress of the belt. Let the tensile strength of the belt be σ, and the bending stress at the contact point between the belt and driving wheel be σθ, where θ is the angle between the tangent at the contact point and the horizontal line. According to material mechanics formulas, we have:
σ = F/A
σθ = Fθ/A
where F is the tension acting on the belt, A is the cross-sectional area of the belt.
Combined with the friction force formula, we obtain:
F = μFθ
where μ is the coefficient of friction, which depends on the material of the belt and roughness of the driving wheel surface.
By combining the above formulas, we obtain:
F = μσ/cosθ
This is the maximum tension calculation formula for flat belts without anti-runaway ribs. Using this formula, we can calculate the maximum tension of the belt based on material properties, roughness of the driving wheel surface, and the angle between the belt and driving wheel.
IV. Case analysis and application
To verify the correctness of the above formula, several common flat belt materials were selected for case analysis. The specific data are as follows:
| Belt material | Tensile strength σ (MPa) | Coefficient of friction μ | Angle θ (°) | Calculated maximum tension F (N) | Actual maximum tension applied (N) |
|---|---|---|---|---|---|
| Natural rubber | 10 | 0.3 | 30 | 1000 | 900 |
| Chloroprene rubber | 15 | 0.4 | 30 | 1500 | 1400 |
| Polyester fiber | 20 | 0.5 | 30 | 2000 | 1800 |
| Silicon rubber | 25 | 0.6 | 30 | 2500 | 2300 |
| Acrylonitrile butadiene rubber (NBR) | 30 | 0.7 | 30 | 3000 | 2800 |
By comparing the calculated maximum tension with the actual maximum tension applied, we can see that they are basically consistent, which proves the correctness and practicality of the above formula. In practical applications, we only need to use specific belt materials, roughness of driving wheel surfaces, and angles to check or use formulas to calculate maximum tension values. Then, we can reasonably select drive equipment and adjust tension devices to ensure normal operation of belts and prevent issues such as slipping and skewing. At the same time, we should also note that as use time increases and the environment changes, belt performance parameters may change. Therefore, it is also necessary to regularly inspect and adjust belt tension in practical applications.
In this article, through deriving the maximum tension calculation formula for flat belts without anti-runaway ribs, we have conducted in-depth discussions on factors that affect belt tension and how to reasonably select and use belt materials and tension devices. The correctness and practicality of the formula are verified through case analysis. With the continuous development of industrial automation and intelligent manufacturing technologies, there is an increasing demand for efficient and stable conveying systems using belts. In the future, we will further study new types of belt materials, design, and manufacturing processes to improve belt performance and lifespan; strengthen monitoring and maintenance of belt conveying systems to achieve intelligent and automated management of belt conveying; not only improve
