Ball bearing disc springs slotted and plain

Ball bearing disc springs slotted and plainThis two types of disc spring are designed to be set up allong with the ball bearings to act as an elastic support which allows it to absorb vibrations and to compensate thermal dilatations produced by the heating/cooling of the axis where the ball bearing is set up. Which results on a longer life and on a reduction of the noise produced.

Plain

Ball bearing disc springs slotted and plainThis ball bearing disc spring results in the following graph:

Ball bearing disc springs slotted and plain

Lo que se logra es un muelle que para una gran variación de desplazamiento dado experimenta una variación de fuerza comparativamente muy inferior al que nos daría un muelle lineal. Por lo tanto con este tipo de arandela podemos proteger un cojinete de bolas.

Slotted

Ball bearing disc springs slotted and plainThis discs are an improvement over the plain disc. The slots contribute in making a much more interesting Force-Stroke diagram. As you can see the spring reaches a point where with a constant force, there is a stroke. Due to its properties this spring protects the ball bearing preventing consecuences from a thermal dilatation.

Ball bearing disc springs slotted and plain

Slotted discs are less rigid and taller. It must also be mentioned that slotted disc springs can be stacked in parallel to obtain a given desired force.

Materials

Ball bearing disc springs are manufactured from high quality spring steel; they can also be made to order in other materials e.g. corrosion resistant or non-magnetic steel, spring bronze Cu Sn 8, copper beryllium alloy Cu Be 2, Nimonic 90 and others.

List of ball bearing disc springs

 

Belleville Fasteners - DIN 6796

Purpose:

Belleville Fasteners - DIN 6796Belleville Fasteners DIN 6796 give permanent pressure to the union between a screw and a nut to prevent the loss of pre-load on it; achieveing in this way a static fix regardless of vibrations and other relaxations which might appear with time.

These are only useful to protect from axial loads. Belleville Fasteners - DIN 6796

Belleville Fasteners DIN 6796 are made to be static. Their use in dynamic applications is not recommended.

In the following table we can contrast values for the residual elastic force, which can only be used as a reference for users of Fastener Bellevilles. It shows the lowest limit of residual elastic force to hold unions through Belleville Fasteners. These values are only aproximate never to be taken as exact.

 

Measurement table of Belleville Fasteners - DIN 6796

Materiales

Belleville Fasteners DIN 6796 are available in C60 (DIN 17221 and DIN 17222) hardness range between 420 and 510 HV. Made of this material they can have different finishes: Oiled; Phosphating + Oiled; Mechanical Zinc Plating.

Fastener Bellevilles DIN 6796 are also available with other materials: Stainless Steel range: X12 Cr Ni 177 (AISI 301) and X7 Cr Ni Al 17-7 (AISI 631). Most common sizes for DIN 6796 can be supplied in Niquel alloys (NICr 19 NbMo) material known as Inconel 718 to be used where a high resistance to corrosion is required or temperature is excesive for conventional materials. Residual elastic forces for this materials will be slightly lower to the previously shown due to a lower elasticity they have.

Disc Springs Din 2093

Introduction:

Disc springs are made up of discs with a conical shape, so when axially loaded change shape. We can assume that the rectangular section of the disc rotates around its central axis C, storing elastic energy;

Disc Springs Din 2093

 

 

 

 

 

Disc springs in contrast with helical springs can generate a much higher elastic force, taking up less space and with smaller strokes.

Compared to other springs, disc springs undergo small strokes with great loads. If greater strokes are required they can also be achieved by series stacking of them.

Its important for people who see this for the first time to realise that this springs aren't used only for a given application. New applications are being discovered for them regularly. Disc springs get to handle high responsability situations to solve complex problems. (For instance. Nuclear power plants, rocket launchings, Satellites, Wind power station, Aviation, Precise machinery, Steel mills, Emergency brakes, Trains, etc...)

Areas:

  1. DIN 2093 Standards
  2. Installation Recommendations for Disc Spring Stacks
  3. Recomendations of use - tensions allowed
  4. Series and parallel stacking of disc springs
  5. Disc Spring Materials
  6. Standard Disc Spring Catalogue