Karsus Special
The K146 railway shock absorbers
The most typical needs of railway vehicle operators these days is to develop high speed railway lines and to purchase high speed vehicles associated with them. Thus, demand on behalf of railway vehicle manufacturers has grown for rail car shock absorbers which are able to resist the extreme stresses accompanying high speed travel reliably on the long term and to provide appropriate comfort to passengers. Our company developed the product lines K146 and K147 for rail car shock absorbers to meet these requirements.
At high speed the effect of so-called unstable run may be encountered when the bogie truck turns away freely in horizontal directions under the car body (wobbling). In order to prevent the low amplitude swaying movements the low mass bogie is stabilised with a shock absorber structure against the large mass body car, which is considered to be a fixed point in this respect. This is why these devices are called rail car sway control shock absorbers. Two key requirements for the characteristic curve of the shock absorbers is to be similar to the characteristic curve of a friction shock absorber but to avoid all disadvantages of the former. Another fundamental requirement is to allow the installation of the shock absorbers in horizontal position, for which our company developed a simple but efficient method.
Thanks to the valve design of the K146 system these products can be used not only to serve the purpose of sway control shock absorbers but also as shock absorbers between car bodies (anti-roll dampers) or in any other places of installation for vehicles with higher damping force requirements.
Key features:
- Robust built to absorb extensive damping forces
- Fastening components providing large angular displacement
- Damping force adjustable in a wide range
- Damping force adjustable irrespective of the direction of stress
- Custom built valve design developed by Kárászy Kft.
- Rail car sway control shock absorbing design to be applied in high speed (>250km/h) vehicles
- Mountable, recyclable design
- No metallic contact between friction elements
Engineers at our company have considered the long term useful lifetime up to 25 years as a fundamental design consideration when designing the K146 product line. In order to achieve this wearing parts and components were applied so that they did not contact with metallic contacts and if they are replaced periodically, you can say that the shock absorber has gained an unlimited useful lifetime.
Engineering details:
Maximum damping force at a speed of 0.1 m/s: 20 kN
Diameter of dust protector tube/shock absorber casing: Ø 110 mm / Ø 100 mm
