RU1515U1 - DAMPER - Google Patents

Abstract

A DAMPER containing a tubular rod with a piston, a valve on the piston and a cylinder filled with a viscous liquid, characterized in that the viscous liquid is located at the lower end of the cylinder and occupies 10 - 20% of the cylinder volume, and there are two holes on the cylindrical surface of the tubular rod, one of which is located at a distance of 15 - 25% of the stroke of the rod from the upper end of the cylinder, and the second hole is 70 - 80% of the stroke of the rod from the upper cylinder.

Description

D E M 11. $ E P

.. A useful damper model relates to the field of mechanical engineering and can be used in various mechanisms where smooth unidirectional braking of any moving part of the machine is required and the quick return of this part to its original position.

The known mechanism of the piston damper of the controller with increased braking at the beginning of the stroke, comprising a rod with a piston, a cylinder completely filled with a viscous fluid; / I /. It counteracts the movement of the cheek in both forward and reverse motion.

The closest prototype is a ball hydraulic damper mechanism / 2 / containing a piston rod with a piston, a spring valve, a cylinder filled with a completely viscous liquid, capable of moving faster during the reverse stroke, as this opens additional valves. In the specified mechanism, it is not possible to create a variable braking force on the piston, and therefore, the temporal speed of the rod moving under the action of a constant pulling force on it during the working stroke.

Since the damper cylinder is completely filled with liquid, increased demands are placed on its sealing, since, as a rule, high pressure develops in the damper cylinder during the working stroke. In addition, the full filling of the damper cylinder with a viscous fluid increases its weight.

The proposed utility model eliminates the above disadvantages and reduces the weight of the mechanism.

To achieve the set technical goal in a damper containing a tubular rod, a valve on the piston and a cylinder filled

A VISCOUS fluid, this fluid is located at the lower end of the cylinder and occupies 10–20 cylinder volumes, and there are two openings on the cylindrical surface of the tubular rod, one of which is located at a distance of 15–25 of the stroke of the rod from the vertical end of the cylinder.

    7

 3 j

and the second hole for 70-80 stroke of the rod from the upper end of the cylinder.

Due to the viscous fluid, which occupies 10-20% of the cylinder volume, a large braking force is created on the piston at the beginning of the stroke, the rod moves slowly, which is set according to the operating conditions. The presence of two holes at a distance of 15-25 and 70-80 of the stroke of the rod from the upper end of the cylinder allows optimally for operation in the third zone to reduce the braking force on the piston and accelerate the movement of the rod in the middle of the stroke and ensure a smooth stop at the end.

The company is not known for other technical solutions that distinguish the claimed mechanism from the prototype.

The drawing shows:

FIG. I - a damper attached to a 6-fold;

FIG. 2 - the internal structure of the damper at rest;

FIG. 3 - shows the operation of the damper during the working stroke;

FIG. 4 - shows the operation of the damper during the reverse stroke.

The damper contains a tubular rod I with a piston 2, a valve 3 on the piston 2 and a cylinder 4 filled with viscous fluid 5 per 10-20 of the volume of the cylinder 4 and located at the lower end 6 of the cylinder 4. There are two holes on the cylindrical surface of the tubular rod I, one 7 of them are located at a distance of 15-25 of the stroke of the rod I from the upper end 8 of the cylinder 4, and the second 9 at 70-805S of the stroke of the rod I from the upper end 8 of the cylinder 4.

The damper works as follows. When you open the locks of the sash (they are not shown) (see Fig. I), it, under the influence of its own weight, turning in the hinge supports, / starts to fall

down. In this case, the damper secured by the cylinder on the sash and the rod on a fixed structure is included in the operation. The piston rod I along with the piston 2 moves up, while the piston 2

moves in a viscous greed 5, which flows through small holes in the valve 3, creating a great resistance to the movement of the piston 2. At this moment, the free edge of the leaf moves at a minimum speed, which is necessary under operating conditions. After the piston 2 from the viscous fluid 5, its speed increases. The braking of the piston in this part of the stroke is due to the compression of gas over the piston 2 begins to go through the tubular rod I into the atmosphere, while its speed of movement increases sharply. At the end of the stroke, the second hole 9 leaves the cylinder and the piston 2 again experiences strong braking due to the pressure of air above the piston 2. The speed of the stem I, and therefore the leaf, slows down, which is necessary for a smooth stop.

When closing the leaf, the piston 2 moves down. By air pressure, the valve 3 on the piston 2 is squeezed out and large holes open on the piston 2, the piston 2 moves without experiencing resistance when moving. Thus, the damper on the return stroke does not interfere with the closing of the sash. In addition, the viscous fluid 5, which fell on the piston seal 2 during the stroke reduces the friction force on the cylinder 4 in the reverse stroke, reducing wear on the seal and the walls of the cylinder 4.

In the open position, the damper flaps prevent strong swinging of the flap during gusts of wind, damping vibrations.

Information sources:

1.Artobolevsky I.I. Mechanisms in modern technology, vol. 5, Science, 1976, p. 44, The mechanism of the piston damper of the regulator.

2.Artoboyaevsky I.I. The mechanism in modern technology, Vol. 5, Science, 1976, p. 46, The mechanism of a piston hydraulic damper ..

- A S 0ol37So

Claims (1)

A DAMPER containing a tubular rod with a piston, a valve on the piston and a cylinder filled with a viscous liquid, characterized in that the viscous liquid is located at the lower end of the cylinder and occupies 10 - 20% of the cylinder volume, and there are two holes on the cylindrical surface of the tubular rod, one of which is located at a distance of 15 - 25% of the stroke of the rod from the upper end of the cylinder, and the second hole is 70 - 80% of the stroke of the rod from the upper cylinder.