Xiamen Shuangyuan Springs Co., Ltd 'Blog

Welcome to shuangyuan,manufacturer of gas spring, disc spring, die spring etc.

Micro Gas Springs

Micro compression gas springs offer users many advantages due their small size and low force. Micro springs are also available in 316 stainless steel and in custom strokes and lengths. The table below shows our standard sizes.

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Corrosion Resistant Disc Springs

Corrosion Resistant Materials
A disc spring material with a high nickel alloy content is considered corrosion-resistant due to the austenitic crystal lattice in its original state. The mixed crystal formation provides the strength in corrosion resistant disc spring material, along with cold working during rolling (see DIN 17 224) and precipitation hardening (X 7 CrNiAl 17 7). The corrosion resistant material is unable to be martempered or austempered like standard disc spring materials. The maximum disc spring material thickness has narrow limits set due to the certain degree of cold working the material. In addition, the strength acquired by cold rolling is lost at temperatures above + 200 °C, but use of corrosion resistant disc spring materials at extremely low temperatures is achievable.

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Gas spring working principle

A gas filled spring consists of a precision rod attached to a piston moving within a sealed cylinder containing nitrogen at high pressure.  As the piston rod is introduced into the cylinder (compression stroke), the internal pressure increases according to the volume of gas displaced buy the rod.  Output forces are the result of the differential between the pressure in the cylinder and atmospheric pressure outside the cylinder acting on the cross-section of the rod.  This increase in Force or K-Factor is normally between 5% - 50%.  In comparison to mechanical springs, gas springs are almost constant force.

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Economical solutions for less critical applications

Belleville washers, manufactured from steel strip, are not scragged (pre-stressed) during the manufacturing process and the inside and outside diameters of the disc spring are not machined.

Belleville washers are a more economical and less precise form of conical disc spring, best used for static applications where some setting and/or loss of force can be tolerated.

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How to adjust the force on a gas spring with an IGS Side Release Valve

The IGS Side Release Valve can be found on the Euroline range of gas springs. It can also be found on custom made gas springs where a SRV was specified.

You should keep in mind that this type of release can also be activated by other persons, therefore it is suitable for prototypes or when the gas spring is fitted in an area which cannot be easily accessed by the end user.

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Frequently Asked Questions About Disc Springs

Do the inside and outside dimensions change under compression?

Yes, the dimensions of disc springs do change under compression but as long as the recommended guide clearance is applied, it will not cause any problems.

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How to adjust the gas spring pressure

How to increase the force

On first orders and prototypes, we always recommend that you purchase a gas spring which has more force than necessary then adjust it down to suit your application.

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Surface Treatments For Disc Springs

We have chosen to list below some of the most commonly requested finishes, if however the finish you are considering is not listed, please call us to discuss your requirements.

Introduction to Protective Treatments
There is currently an almost endless choice of surface treatments available to protect components against numerous working conditions.

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Protect the gas spring can do and can not do

Can do:

Try to use ball joints to help avoid side load forces. If eyes or fork clevises are used, ensure a loose fit to allow for lateral movement.
Use standard gas springs rod down, i.e. the spring should be mounted so that it spends most time in a rod down position, within 60° of vertical, thus ensuring the seal stays lubricated. For tension springs the exact opposite is true, i.e. use rod up. Once installed, test at least every three months.
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Stainless Steel Disc Springs

Corrosion Resistant Disc Springs
The standard range of stainless steel disc springs are manufactured from X12CrNi 17 7 (DIN 1.4310) at thicknesses up to 1.25mm and from 1.25mm upwards from X7CrNiAl 17 7 (DIN 1.4568).

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Author

shuangyuan

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Xiamen Shuangyuan Springs Co., Ltd copy right @2006-2008     Address: No.177, Xisanli, Jinshan, Huli, Xiamen, China
Tel: +86(592)5254186   +86(592)5289710       Fax: +86(592)5513310
Email: shuangyuan@springinchina.com    rosecn888@gmail.com
China manufacturer of gas spring,disc spring,die spring,lockable gas spring and compression spring