How to Design a Torsion Spring for a Carousel Loading Mechanism?

In summary, the person is seeking help with using a torsion spring to load a carousel in a specific way. They are unsure of how to calculate the spring force and how to translate the desired movement of the carousel into intervals for the spring. Suggestions include using a cam and lever, a softer spring, or a clockspring for more constant force.
  • #1
deborah_88
3
0
Hi there, needing some help with a torsion spring application...I'm looking to use a torsion spring to load a carousel (which is about 400mm diameter, 100mm height and weighs about 2.5-3Kg) so someone will turn this carousel (onto a base) which will load the torsion spring...the spring will be prevented from moving back to its original position and held at that position. THEN, through an escapement mechanism and lever arm, will allow a degree of movement when the user requires it. There must be 16 intervals of this movement which will turn the carousel 16 times to specific points.
I'm not sure if that makes sense at all! But any help on where to start, first of all where to start with torsion spring calculations as the 16th interval will have a lower spring force (as it is the closet distance to the original point of the torsion spring arm) so how to make sure this is still "strong" enough to turn the carousel. Also, how to translate the 16 intervals to the turning of the carousel -so maybe the torsion spring will but directly in contact with the carousel or would I be best using gears to increase to movement? (the distance for each interval that the carousel needs to move each time is approx 30-40mm)
ANY HELP WOULD BE APPRECIATED!
 
Engineering news on Phys.org
  • #2
Since the spring's force will vary with displacement, you should make sure the spring is only moving through a small displacement relative to the distance from its unloaded position, then the force is approximately constant.

I think the carousel is only moving through half a turn or less, so maybe you can have a cam on the carousel which loads the torsion spring through a lever.

Or use a softer spring connected directly, so the unwound position of the carousel corresonds to, say 2 turns of the torsion spring, and the fully loaded position corresponds to 2.5 turns. Then you can calculate the spring's torque at the two ends of the range to make sure it's always acceptable.

Or use a clockspring which has more constant force over a much wider range of angles.
 

1. What is a torsion spring and how does it work?

A torsion spring is a type of mechanical spring that works by twisting or rotating to store and release energy. This is achieved by applying a torque or twisting force to the spring, causing it to deflect. As the force is released, the spring returns to its original shape, releasing the stored energy.

2. What are some common applications of torsion springs?

Torsion springs have a wide range of applications in various industries, including automotive, aerospace, and manufacturing. Some common uses include garage doors, clothespins, mouse traps, and electrical switches. They are also used in larger industrial machinery and equipment, such as farm machinery and hydraulic systems.

3. How do you determine the right size and shape of a torsion spring for a specific application?

The size and shape of a torsion spring will depend on several factors, including the amount of torque or force needed, the available space for the spring, and the expected lifespan of the spring. These factors can be determined through calculations or testing, and a qualified engineer or spring manufacturer can help determine the best size and shape for a specific application.

4. What materials are commonly used for torsion springs?

Torsion springs can be made from a variety of materials, including high-carbon steel, stainless steel, and non-ferrous metals like bronze or titanium. The choice of material will depend on the specific application and the desired strength, durability, and corrosion resistance of the spring.

5. How do you maintain and extend the lifespan of a torsion spring?

To maintain and extend the lifespan of a torsion spring, it is important to regularly inspect it for wear and tear, clean and lubricate it as needed, and replace it if it becomes damaged or loses its tension. It is also important to avoid overloading or overstressing the spring, as this can cause it to fail prematurely.

Similar threads

How to calculate the stiffness of a spring wire cantilever beam?
    • Mechanical Engineering
Replies
4
Views
636
How fast will this torsion spring open a lid?
    • Mechanical Engineering
Replies
4
Views
2K
Springs: Can they be used to conserve energy?
    • Mechanical Engineering
Replies
2
Views
653
Two DOF Anglepoise Spring-balance with Distributed weight
    • Mechanical Engineering
Replies
1
Views
3K
Explanation of the mechanics of a rack and pinion system?
    • Mechanical Engineering
Replies
3
Views
3K
Automotive How can gears improve the performance of mousetrap cars?
    • Mechanical Engineering
Replies
1
Views
5K
Analyze Suspension Loads in Double Wishbone Push-Rod Design
    • Mechanical Engineering
Replies
1
Views
2K
Direction of a spring's force in more than one dimension
    • Introductory Physics Homework Help
Replies
6
Views
1K
Strength of springs - length of travel vs tension weight
    • Mechanics
Replies
1
Views
958
Determining Maximum Force on Ball and Spring Load Rate
    • Mechanical Engineering
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top