Single-pipe shock absorber

FIELD: mechanical engineering.

SUBSTANCE: single-pipe shock absorber comprises housing (1), piping hollow rod (3) with unmovable piston (5) that separates hydraulic space (A) into two compartments. Space (B) in the rod is connected with the hydraulic space through openings (7). The rod space receives flexible hollow balls (6) made of a flexible synthetic material. The shank of the rod is provided with screw (4) that bears balls to exclude cavitation at high speed of the working piston.

EFFECT: enhanced reliability.

1 dwg

 

The invention relates to a transport machine-building, namely the suspension of vehicles.

Analogue is hydropneumatic providentiae item [1], having a hollow stem. The disadvantage of this device is bulky designs because there is a separate gas cavity, and the absence of insulation gas and hydraulic cavities in the stem, leading to uncertainty damping characteristics of the device due to partial dissolution of the gas in the working fluid when the element.

The prototype of the claimed invention is described in the patent [2] Monotube gas-filled shock absorber. It includes a housing, a guide sleeve, a rod fixedly mounted on it working piston, a hydraulic chamber filled with working fluid and separated by a working piston into two parts, and the gas cavity and the piston separator, separating it from the hydraulic cavity. The absorber is more compact compared to similar [1] and the gas therein is separated from the working fluid. The disadvantages of this absorber are:

- untapped reserve of energy, which consists in the fact that the hydraulic cavity does not occupy the entire space between the cylinder and the piston rod (part of this space is given by the gas cavity);

- reduced the resisting film to prevent the pressure curve of the rod against lateral forces;

- the rolling friction of the piston-separator of the body, leading to a decrease in the sensitivity of the shock absorber, as well as a reduction in the reliability of the separation of gas and hydraulic cavities due to wear of the seals.

The technical task of the invention is to increase the intensity, reliability and sensitivity Monotube shock absorber.

The technical problem is solved by the fact that in one-pipe shock absorber, comprising a housing, a tubular hollow stem with motionless established a working piston dividing the hydraulic cavity into two parts, a hollow stem connected holes with hydraulic cavity in the stem cavity posted elastic hollow balls made of elastic synthetic material, and the shank rod set screw, propping up the balls, to prevent cavitation at high speeds of the working piston.

The drawing shows a General view of a Monotube shock absorber with a cavity in the stem.

Monotube shock absorber with a cavity in the stem includes a housing 1, the guide sleeve 2, the tubular stem 3 with the cavity And the screw 4 in the shank and with rigidly mounted on a rod working piston 5, and divided them into two parts hydraulic cavity B. In the cavity And the rod 3 is placed an elastic hollow balls 6 made of elastic synthetic material. The cavity And the rod 3 connection is replaced with a hydraulic cavity B of the absorber holes 7.

In the hydraulic shock absorber cavity B occupies the entire space between the casing 1 and the rod 3, resulting in almost the entire surface of the housing 1 is involved in the removal of heat from the working fluid, providing increased energy intensity.

Hollow construction of the balls 6 in combination with filling their gas gives them flexibility and the ability to change the volume. By varying the latter when the shock absorber is compensated by the change in the volume part of the rod 3 located in the housing 1. The volume of the cavity And the rod 3 is greater than the maximum volume change of the part of the rod 3 located in the housing 1, achieved in the process of operation.

The use of balls 6 eliminates the rolling piston separator with the inherent friction, and this, in turn, will increase the sensitivity and reliability of the shock absorber. Elastic balls material provides durability, higher than the whole life cycle of the shock absorber.

Permanent backwater balls 6, or a force on the working fluid is in the process of Assembly of the shock absorber by means of a screw 4. This apparatus eliminates the phenomenon of cavitation at high speeds of the working piston 5 and provides full output shaft 3 in the absence of a load.

The shock absorber works as follows.

During compression of the working piston 5 of the shock absorber moves the bottom. The pressure of the working fluid in the lower part of the hydraulic cavity B is higher than in its upper part. The working fluid out of the lower part into two streams: first, through the channel of the working piston in the upper part of the hydraulic cavity, secondly, through the holes 7 into the cavity And the stem. Increasing the cavity pressure compresses the balls 6, reducing their total amount by an amount equal to the increase in the volume part of the rod 3 located in the housing 1.

When you hang up working shock absorber piston 5 moves upward. The pressure in the upper part of the hydraulic cavity B is higher than in its lower part. The working fluid passes from the upper part of the hydraulic cavity through the channel of the working piston in the lower part of the hydraulic cavity. Due to the reduction of pressure in the lower part of the hydraulic cavity, the fluid flows down and out of the cavity And the rod 3 through the opening 7. The total volume of the balls 6 is increased by an amount equal to the reduced portion of the rod 3 located in the housing 1.

Existing technologies engineering and applied therein allow you to organize industrial production and equipment vehicles Monotube dampers with a cavity in the stem.

Used sources of information:

1. Wheeled chassis A and B. Technical description. Instructions for putting into operation the promotion. Voenizdat. M., 1980, s...137 (similar).

2. U.S. patent No. 4418802, CL F 16 F 9/34, 1983 (prototype).

Monotube shock absorber, comprising a housing, a tubular hollow stem with motionless established a working piston dividing the hydraulic cavity into two parts, with the cavity of the rod are connected by holes with hydraulic cavity, characterized in that the stem cavity posted elastic hollow balls made of elastic synthetic material, and the shank rod set screw, propping up the balls, to prevent cavitation at high speeds of the working piston.



 

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