ŠTRUKTURÁLNA PODLOŽKA

Comparison Between Structural Washer and Flat Washer 

Function emphasis: Flat washer mainly focuses on distributing pressure and protecting the surface of connected parts, while structural washer not only distributes pressure, but also emphasizes ensuring the stability and reliability of connection under high load and special stress conditions. For example, the use of flat washers in the connection of ordinary furniture is mainly to prevent screws from scratching the wood surface and evenly distribute the pressure; In the connection of building steel structure, the structural washer needs to bear huge building load to ensure structural safety.

Performance requirements: structural washers require higher load-bearing capacity, dimensional accuracy and fatigue resistance. Flat washers are generally used to bear small loads, and their strength and accuracy are relatively low; structural washers are usually used to connect large structures or key equipment, and there are strict standards for their materials, dimensional accuracy and mechanical properties.

Comparison Between Structural Washer and Spring Washer 

Anti-loosening principle: the spring washer mainly produces axial elastic force through its own elasticity, which increases the friction between the bolt thread and the connected parts to prevent loosening; The toothed structural washer in the structural washer is prevented from loosening by embedding teeth into the surface of the connected part. In the aspect of locking effect, the washer with tooth structure may have more advantages in some occasions with high vibration and high impact, because the bite force of its teeth is relatively stable; The anti-loosening effect of spring washer may be affected by its elastic decline and other factors.

Application scenario: spring washer is suitable for all kinds of connections with anti-loosening requirements, especially for general mechanical connections and small equipment connections under vibration environment; structural washers are mainly used for large-scale structural connections and connections subjected to special forces, such as key connection parts in the fields of buildings, heavy machinery, energy equipment, etc., which require extremely high reliability and safety of connections.

What Are the Key Points When Choosing Structural Washers? 

When selecting the type, we should first consider the load type (such as axial force, shear force, tensile force, etc.) and size of the connection parts. If it is a building structure connection that bears large axial pressure, the flat structural washer may be an option, but it should be ensured to have sufficient bearing capacity and suitable size;

If it is a connection that bears tension or has special stress requirements, such as bridge cable anchorage, the conical washer may be more suitable. For example, when calculating the gasket required for the connection of the boom of a large crane, the axial pressure should be calculated according to the lifting force and self-weight of the boom, and then the flat structural washer that can withstand this pressure should be selected.

The temperature, humidity, corrosiveness and other factors in the working environment are very important for the selection of structural washers. In high temperature environment, the high temperature resistance of gasket material should be considered, such as selecting high temperature resistant stainless steel structural washer; In humid or chemically corrosive environment, choose gaskets with good corrosion resistance, such as galvanized or stainless steel structural washers.

For example, in the connection of chemical equipment, it is necessary to select an appropriate corrosion-resistant gasket according to the chemical medium in contact, so as to prevent the gasket from being corroded and lead to connection failure.