Viscous-friction type shock absorber

FIELD: hydraulic shock absorbers.

SUBSTANCE: viscous friction damper includes housing, partition with openings and rod passing through central opening of partition. Two similar corrugations of elastic material are fastened in housing; central partition is clamped between said corrugations. The last define two different-volume and variable-dimension cavities filled with shock absorbing liquid. Rod has two sites for fluid-tight securing of it to said two corrugations. Openings of partition through which shock-absorbing liquid is pressed are covered by means of flexible membrane providing possibility for controlling their number and size.

EFFECT: enlarged manufacturing possibilities, improved efficiency of shock absorber.

1 dwg

 

The invention relates to hydraulic shock absorbers.

Known hydraulic dampers viscous friction, comprising a housing filled with damping fluid and divided into two parts by a partition with a hole, and the rod. (“Great encyclopedic dictionary Polytechnic), BDT, 1998, s (Fig.)).

Closest to the claimed technical essence and the achieved effect is the viscous friction damper (see A.S. No. 279265 from 15.04.1969,, CL IPC F 16 F 5/00 - prototype).

Known damper includes a housing filled with damping fluid and divided into two cavities by a partition with a hole, and the rod. The walls of the housing, parallel to the partition, made in the form of membranes, rigidly connected with the rod passing through the Central opening in the partition. Known damper works as follows.

When the oscillation of the rod is fixed relative to the housing, the damping medium is forced through the gap formed by the hole and rod and through the holes, thereby the dissipation of vibrational energy.

The disadvantage of this damper is the limited stroke of the stem and membranes and consequently the time of their displacement, i.e. the limited capacity and poor performance.

The aim of the invention is to eliminate this drawback, i.e. R is SIRENIA its capabilities and improving the performance of the damper.

The problem is solved due to the fact that the viscous friction damper comprising a housing, a partition with holes and rod, two similar corrugations of elastic material, is fixed in the housing, between which is sandwiched a Central partition, and form two different in scope and variables largest cavity filled with damping fluid, the rod has two sites for tight fastening with two corrugations and holes in the wall through which the damping fluid is forced, covered by a flexible membrane that provides the ability to adjust their size and number.

The drawing shows the described damper in longitudinal section.

The walls of the damper, which represents a similar corrugations 1 (conditionally top) and 2 (conditionally bottom),using nuts 3 fixed in the housing 4. Between these corrugations is sandwiched partition 5 with holes 6. Hole 6 is overlain by a flexible membrane 7 so that the opening of required size of these holes, corresponding to a certain speed of movement of the RAM 8 when the specific viscosity of the damping fluid 9 occupying the cavity of both bumps. The rod 8 has two sites for tight fastening with two corrugations, and its length and the length of the projection of the partition walls 5 form various sized cavities bumps 1 and 2. In the upper area of the stem and th is d 1 there are openings 10, muffled by the gasket 11 and the nut 12, to fill the damping liquid. The rod 8 passes through the partition 5 so that the gap between him and the ledge partitioning does not affect the operation of the holes 6. Flute 1 and 2 is made of elastic material such as rubber.

This damper works as follows.

When the movement of the rod 8 downward flute 1 will be compressed, the volume of the cavity formed by the Flexi hose 1 will be reduced, and the damping fluid 9 to Pereyaslavets through holes 6 partitions 5 into the cavity formed by the Flexi hose 2. When the rod 8 and the pressure of the damping liquid flowing 9 will push corrugation 2 and to increase the volume of the cavity. When the flow of fluid 9 from the cavity of the corrugations 1 in the swage cavity 2 through the opening 6 there is a loss of energy of motion of the rod and the damping its movement.

Thanks to the variable volume cavities formed flexible corrugations 1 and 2, the piston stroke increases significantly, and the change in the size or number of holes 6 in the partition 5 with the diaphragm 7 allows you to vary the degree of damping and speed of movement of the rod 8, which extends the life of the damper and increases its performance.

The viscous friction damper, comprising a housing, a partition with holes and the rod passing through the Central opening in the partition, characterized in that it is conducted two similar corrugations of elastic material, fixed in the housing, between which is sandwiched a Central partition, and forming two different in scope and variables largest cavity filled with damping fluid, the rod has two sites for tight fastening with two corrugations and holes in the wall through which the damping fluid is forced, covered by a flexible membrane that provides the ability to adjust their size and number.



 

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