FIELD: railway transport. SUBSTANCE: proposed rail grinder contains abrasive wheel pressed to rail by pneumatic cylinder. Pneumatic distributors are used to supply compressed air into pneumatic cylinder spaces. Pneumatic distributors are electrically operated from switchboard. To stabilize power of electric drive of abrasive wheel at limited displacement of its piston, additional hydraulic cylinder is provided which is coupled by means of rod with piston of single-rod pneumatic cylinder. Device contains also hydraulic servovalve and hydraulic supply source which are connected with hydraulic cylinder by hydraulic lines. EFFECT: improved quality of rail grinding. 1 dwg
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