HYDRAULIC DAMPER Russian patent published in 2013 - IPC F16F5/00 F16F9/16 F16F3/02 

FIELD: machine building.

SUBSTANCE: damper includes a base with a rigidly fixed stock at its bottom, and guide, elastic and damping devices. Guide device is made in the form of a cylindrical sleeve with formation of a tight annular cavity between outer surface of a stock and inner surface of a sleeve. Bottom of the sleeve is fixed in the sleeve rigidly attached to the base of a protected object. An elastic device is located in the annular cavity. Lower part of the elastic device is supported on the bottom and upper part is supported on the piston. The piston is made in the form of a disk and located with a throttling gap relative to the stock. In upper part of the stock there located is a movable cover plate relative to the stock, which consists of an annular flange with a seal relative to the stock and a sleeve rigidly attached to the flange and enveloping the outer surface of the cylindrical sleeve through a seal. Upper part of the elastic device is made in the form of a cylindrical spring, the upper end face of which is supported on the cover plate, and the lower one is supported on the piston. A supporting element of the vibroisolated object is fixed on the cover plate. Lower part of the elastic device is made in the form of a pack of flat annular springs fixed in the sleeve by means of an elastic spacer sleeve and stiff supports. Annular springs are fixed on the stock with their central part made in the form of a hole coaxial to the stock through a stiff spacer sleeve. The stock is hollow and has an inner threaded hole in its lower part and connected to a threaded bar rigidly attached to the bottom through a stiff support and an elastic washer.

EFFECT: improving reliability of a damper and vibration isolation efficiency.

2 cl, 3 dwg