Karl-Schultz-Schieber
The Karl Schultz valve is a pressure compensation piston valve for steam locomotives . It was the standard design of locomotives from the time of the Deutsche Reichsbahn , and was used in almost all standard locomotives. Karl Schultz sliders are often referred to in the literature as Nicolai sliders .
The piston valves were named after Karl Schultz (1870–1943), who worked as a locomotive designer from 1892. Among other things, he worked at Vulcan , Union Gießerei Königsberg and most recently at Schichau . There are various representations about the origin of the construction, the fact is that they were later sold by the Schichau company.
The slides are to be classified in the row of piston slides with support rod and narrow resilient rings with internal inflow. The innovation of the Karl-Schulz design was that it managed without the previously usual pressure equalization with air suction and pressure equalization valves, but this was achieved through an almost unhindered pressure equalization through special chambers in the cylinder housing. On the same page you can see a photo of the complete slide; it consisted of two piston halves firmly attached to the piston rod and two piston halves movably mounted on the piston rod. A compression spring was arranged between the two piston halves . With the regulator open, i.e. with steam pressure in the valve body, the movable piston half was pressed against the spring force against the fixed piston half. When the regulator is closed, i.e. when idling, the spring opened a gap by pressing the movable piston half, through which the pressure equalization was achieved. Both piston halves carried out the slide movements together, followed by a somewhat heavier idling compared to the Trofimoff slide .
Karl Schulz sliders are still in use on many of the former standard locomotives. A nice photo of the entire pre-assembled slide rod can be found in a book on the DR series 01 , whereby the Karl Schulz slide is shown without the fixed piston half.
literature
- Collective of authors: Piston valves, air suction and pressure equalization valves for locomotives , 4th edition, Knorr-Bremse AG, Berlin-Lichtenberg, Neue Bahnhofstrasse 9–17.
Individual evidence
- ↑ History of the Karl-Schulz-Slider on www.drehscheibe-online.de
- ^ Representation of an advertising brochure from 1938
- ↑ Karl-Schulz-Kolbenschieber advertising brochure for the Schichau company
- ↑ Internet page about the use of Karl Schulz slide
- ↑ Internet page about how the Karl Schulz slider works
- ^ Manfred Weisbrod, Hans Müller, Wolfgang Petznick: Dampflok-Archiv, series 01-99, Transpress-Verlag, Berlin 1976, page 123
