Understanding Overhead Doors - Part 3(Ndustrial Door Torsion Spring)

During the up and down operation of an industrial door with a sliding track,the power to overcome the weight of the door panel is mainly balanced by the torsion spring force of the balance system.The motor only plays a part of the lifting force and limit function during the up and down operation traction.Therefore,the relationship between the design load frequency,balance force,and weight of the door panel of the torsion spring is crucial for the normal and safe operation of the door body.The industrial door torsion springs designed and manufactured by YOTOOLGDS Spring Factory are designed according to the manual opening effect when on-site installation conditions allow.The door body can be manually opened to any position and can remain balanced.

Design:

According to the size of the door body,the total weight of the door body,the number ofworking loads required by the customer(i.e.the fatigue number of the torsion spring),the opening and liting method,the model of wire wound wheel is selected,and the surrounding installation conditions are used for the most scientific and safe design.

The safest and most cost-effective design principle:Design a balance system that is safe and balanced,easy to open,uses the lightest material weight,has the lowest cost,and has the best effect according to customer requirements.

Texture of Material:

60Si2MnA oil quenched and tempered steel wire,65Mnoil quenched and tempered steel wire,or 82B high-strength spring steel wire.

Due to the frequent opening of industrial doors,the total weight of the door body is large,the lifting method is special,and the stress of the torsion spring changes frequently,so tensile strength is required for the material.High Elastic Limit,good toughness,uniform continuity,good tempering stability,smooth surface,commonly used  60Si2MnA oil quenched steel wire.

Heat Treatment:

A4-meter-long continuous conveyor mesh belt type electrically controlled tempering furnace adopts an imported Omron temperature controller and automatic control system,with high temperature control accuracy.The hot air mixing device ensures accurate and balanced furnace temperature,and the effect is good after heat treatment. 

Rust prevention treatment:

Torsion Test:

                                       Standard lifting industrial door                         Vertical lifting industrial door                    High level lifting industrial door                      Special lifting industrial door

List of same door panel size,same weight,different lifing methods,different fatigue times design,and torsion spring weight

Date	YOTOOLGDS SPRING
Door panel size(width×high×Weight)including accessories	4280×4200       152.8kg
Lifting method	Elevated by 1.8 meters,sliding upwards
Wire reel specifications	120 Half Tower Wheel
Pre winding length of steel wire rope (starting from the wire reel clamp)	1760mm
Pre winding length of steel wire rope (starting from the wire reel clamp)	About 13 laps
All industrial door torsion springs have the above identification.Please read this label carefully when installing.

Installation method for industrial door torsion spring:

1.Upslide liting industral door:the installation method of the torsion spring is the same as that of the garage door on the upper slide. 

2.Fully vertical lifting industrial door:Because the torsion spring always bears the same weight of the door body,only by changing the size of the wheel diameter,that is,changing the torque size,can the torsion spring torque and the door weight be balanced,so tower  wheels need to be installed.

3.Semi vertical lifting industrial door:It is necessary to install a half tower wheel to balance the torsion spring torque and door weight.   When lifting the door vertically,the tower wheel part of the half tower wheel is used,and when liting the sliding part of the door,the flat wheel part of the half tower wheel is used.