Hydraulic shock absorbers for rolling stock

telescopic shock absorbers they are produced in five series and in hundreds of modifications

The development and production of hydraulic shock absorbers has been a key part of the company's activities since 1983. The product spectrum covers the complete needs for primary, secondary, transverse, interchassis or intercar damping of passenger cars, locomotives, electric and diesel units, trams and subway cars.

The standard production program of hydraulic shock absorbers is complemented by special shock absorbers fitted with a piston rod position sensor, rotary shock absorbers designed for low installation and hydraulic control cylinders. All manufactured shock absorbers are tested on our own testing equipment.

As part of the application of experience in the field of hydraulics, the production program also includes the production of parts of hydraulic and pneumatic systems for drives, cabinets and chassis of mass transport vehicles.

Since 2018, ST-OS has been developing new generation advanced damping systems in cooperation with the design and technology development team of BUT in Brno, Pardubice University, VÚKV, VÚŽ.

These are semi-active types of dampers based on the magnetorheological damping system, which the company has registered as a utility model, as well as semi-active hydraulic dampers with a high speed damping response. With the support of the national carrier ČD, as, semi-active shock absorbers undergo operational tests on the railway.

Technological workplaces for the production of shock absorbers:

Machine shop with fully automated CNC machining machines with material feeders
Construction equipped with automated oil dispensers for completing hydraulic assemblies and functional units
Welding shop equipped with a programmable robotic arm for rotary welding up to a diameter of 450 mm, a maximum length of 500 mm, a maximum weight of 30 kg
Rehearsal room for vertical and horizontal tests of hydraulic shock absorbers, including climatic chambers
Paint shop with modern equipment for environmentally friendly application of wet and powder coatings with pre-treatment of the surface by phosphating
Production of special packaging according to customer requirements

Primary shock absorbers (P80, P110)

Hydraulic shock absorbers for vertical and transverse damping of all types of rolling stock chassis. They are characterized by reduced weight and compact built-in dimensions. The valve system allows the setting of symmetrical and asymmetrical working characteristics.

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Secondary shock absorber (P8)

Hydraulic shock absorbers for vertical and transverse damping of all types of rolling stock chassis. The valve system allows the setting of symmetrical and asymmetrical working characteristics.

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Yaw shock absorbers (R95, R110)

Hydraulic shock absorbers for damping the vibrating movements of the chassis, intercar and roof dampers. Damping is guaranteed even from low piston speeds (0.0026 m/s). The design allows only the setting of symmetrical working characteristics.

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Shock absorber (RT)

Hydraulic dampers for low-floor vehicles with limited installation space. Converts linear motions to rotation using a lever and rod, which may be included. The valve system allows the setting of symmetrical and asymmetrical working characteristics.

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Advanced damping systems (MRT)

Semi-active damping system with a very short reaction time. The use of a suitable control algorithm improves the comfort of passengers and driving characteristics of the vehicle and reduces the wear of the chassis parts and the track surface. Shock absorbers of a simple one-shell construction with a minimum of moving parts. A connection to an electrical power source is required for the system to function.

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Special shock absorbers (TV, NV110)

Special hydraulic shock absorbers for shock absorption, reduction of mechanical stress and wear or reduction of operating noise, which are intended not only for the chassis of rail vehicles.

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