Hydro dampers for passenger cars

Description:

As of now we have developed modification of hydraulic dampers for installation of the carriers suspension in passenger cars of the following types: KVZ-CNII types I and II, plus 68–4063, 68–4064, 68–4065, 68–4066, 68–4095, 68–4096 and others.

Hydro damper is intended for installation of the carriers suspension in passenger cars:

• in the central suspension stage — in tilt positions;
• in the central suspension stage with separate damping — in vertical and horizontal positions;
• in the axlebox suspension stage.

It is used and effectively performs in vertical, horizontal and tilt positions. The product has passed all kinds of testing, was certified and the design solutions were patented, and meets all the modern requirements for high-speed traffic safety.

The damping system for passenger cars that includes unified hydrodampers in the central and bolster stages of the suspension and is most effective for damping of vibrations in all the range from 0 to 15 Hz. Implementation of the all types bogies of the passenger car.

We also have designed and manufactured hydraulic dampers for trucks 68–7007, 68–7012, 68–7041, 68–7044, 68–7047, with central suspension stage, with separate damping, and with axlebox suspension.

Among our new innovations are dampers for wobbling and skidding.

We actively cooperate with the producers of rolling stock to customise hydraulic dampers to suit particular requirements and wishes of our clients. Based on expertise, our specialists can calculate all the necessary technical characteristics, dimension types, and attachment points in order to ensure the most effective operation of a hydraulic damper.

• significantly enhances safety and comfort of transportation;
• increases smoothness of the consist running by 20–30%;
• effectively dampens dynamical stresses affecting the cars within the range from 0 to 15 Hz including especially harmful to human range of 4 to 8 Hz;
• it can be implemented for any traverse speed — up to 250 km/hr and faster;
• the temperature operating range is from -60 to +60 °C;
• due to the damper characteristics, the car’s hardware and the track lifetime increases twofold;
• the guaranteed no-failure operating time without repair is 3 years or 1 m.km.

All of the claimed advantages are confirmed with the comparison test results conducted in the testing area of the All-Russian Scientific Research Institute of Railway Transport (VNIIZhT).

Figure 1 indicates the results of tests performed in the speed testing area of VNIIZhT comparing dynamic stresses in the bolster stage of the carriage suspension of passenger cars with the standard damping system and with the prototype damping system by RDC «TECHINDUSTRY». Based on the data produced in the course of the test it was concluded that implementation of the prototype damping system by RDC «TECHINDUSTRY» dynamic stresses reduce more than by two times compared to the standard system.

The comparison testing objective of dropping a car equipped with the standard and the prototype damping system from wedges (Fig.2) was checking of conformance of the car ride performance to technological normative documentation and comparison of the two systems' performance. The testing was performed in the speed testing area of VNIIZht Belorechenskaya-Maikop according to approved program. The results of the testing allowed making the following conclusion: the vertical dynamic bending of the central suspension with the prototype dampers installed, at the average was lower by 15% compared to the standard dampers and in the bolster suspension — lower by 51–56%; the vertical car body acceleration with the prototype vibration dampers at the average was lower by 12–15% and horizontal — lower by 30% compared to the standard dampers; in the car equipped with the prototype damper there noticed reduction of the dynamic load level in the range of speeds of 100–120 km/hr. In general the testing showed that the new damping system for passenger cars dampens dynamic perturbations in the range up to 10 Hz, thus minimizing the resonant speeds impact; the damping time in the cars equipped with the hydro dampers by the RDC «TECHINDUSTRY» is more than 3 times shorter and the initial amplitude is 1.5–2 times less than that in the car equipped with the standard vibration damper.