SU1430638A1 - Pneumohydraulic spring - Google Patents

Description

4 CO O O5 CO 00

This invention relates to the suspension of vehicles, in particular, to pneumatic-hydraulic springs. .

The purpose of the invention is to increase the reliability of the pneumatic air spring.

Pa in the drawing shows a pneumohydraulic, spring, longitudinal section,

The pneumatic-hydraulic spring contains a cylinder 1 with a cavity 2, the hollow rod 3 with a piston A, tubes 5 and 6 connecting the cavity 7 of the hollow rod with the piston cavity 8 formed by the surfaces of the piston 4, the hollow rod 3 and the cylinder 1J oil collector 9 and the steps of the plunger 10 placed in the housing 11 mounted on the outer no.-iepxHocTH cylinder 1. The cavities 2 and 7 are freely connected with each other and filled to compress the gas and liquid, and the cavity

. 8 is filled only with a brush. The hollow rod 3 is sealed to the walls of the oil assembly 9 by seals 12 and 13. In the tube 6, an overflow valve 14 is installed. The stepped plunsler 10 is preloaded by the spring 15 on the side of its larger stage and has an axial channel 16 with a closer position to the lower stage plunger additional M check valve 17. Above: the plunser cavity 18 above the larger stage of the plunger 10 is connected to the cavity 2 B of the upper part of the cylinder 1 by means of an additional tube 19, the Sub Plunger cavity 20 under the lower stage the plunger sulfur is connected

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During the recoil, i.e. when the rod 3 exits the cylinder 1, the pressure in the cavity 2 and 7 decreases, the liquid from the cavity 8 is displaced into the cavity 7 through the tube 5, as the overflow valve 14 in the tube 6 is closed. At the same time, the pressure in cavity 7 and 22 becomes higher than the pressure in cavity 2 and 8 due to fluid throttling} when entering the tube 5. When a certain value of pressure is exceeded in cavity 8, and hence in the cavity, the 22-step plunger 10 moves upwards, compressing the spring 15 and sucking through the check valve 21 the leakage of liquid and gas from the oil collection head 9 into the cavity 20,

In the course of compression, t, e, when the rod 3 enters into the tank 15, the gas in cavities 2 and 7 is compressed, and the liquid from the strip 7 flows into the cavity 8 through tubes 5 and b, opening the bypass valve 14, due to the large section of the tube b pressures in cavities 2 and 8, and consequently, and in cavities 18 and 22, are almost equalized, by plunchere through the return valve, valve 21 from the oil collector 10 under the action of the spring 15 peQ

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with respect to cylinder 1. In this case, there is practically no leakage of liquid and gas through seal 12 and 13 of the oil collector 9, i.e., the characteristics of the spring remain unchanged.

When the vehicle is moving, the rod 3 is moving along the irregularities relative to the seal 12, which leads to leakage of liquid and gas through it, which accumulate in the oil collector 9, as it is retained by the seal 13,

During the recoil, i.e. when the rod 3 exits the cylinder 1, the pressure in the cavity 2 and 7 decreases, the liquid from the cavity 8 is displaced into the cavity 7 through the tube 5, as the overflow valve 14 in the tube 6 is closed. At the same time, the pressure in cavity 7 and 22 becomes higher than the pressure in cavity 2 and 8 due to fluid throttling} when entering the tube 5. When a certain value of pressure is exceeded in cavity 8, and hence in the cavity, the 22-step plunger 10 moves upwards, compressing the spring 15 and sucking through the check valve 21 the leakage of liquid and gas from the oil collection head 9 into the cavity 20,

In the course of compression, t, e, when the rod 3 enters the tank 15, the gas in cavities 2 and 7 is compressed, and the liquid from the cavity 7 flows into the cavity 8 through pipes 5 and b, opening the bypass valve 14, due to the large section of the pressure tube b in the cavity x 2 and 8, and therefore, and in the cavity x 18 and 22 are almost aligned, Plun

the nickname 9, the ring cavity 22, formed by the surfaces of the housing 11 and the stepped plunger 10, is connected to the sub-piston cavity 8,

Pneumohydraulic spring works as follows,

In a static position, for example, when the vehicle is parked, the stock 3 with a non-single piston

five

moves downward, squeezing out leaks through a check valve 17 through channel 16 from cavity 20 to cavity 18, which through pipe 19 flow into cavity 2,

In this way, the leakage of the working medium from the oil sump back into the working cavity occurs and the elastic characteristics of the spring are restored.

Editor A.Lezhnina

Compiled by V.Akogyuv

Tehred L. Serdyukova Proofreader M. Maksimishinets

Order 5321/35

Circulation 784

IPPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

nineteen

go

Subscription

Claims (1)

PNEUMATIC HYDRAULIC RESOURCE of vehicles, comprising a cylinder, a hollow rod located therein with a piston, tubes connecting the rod cavity to the piston cavity formed by the surfaces of the piston, hollow rod and cylinder, an oil pan and a plunger pump including a housing, a stepped plunger placed therein, having an axial channel and forming a sub-plunger cavity with the housing, communicated by a check valve with an oil pan, an annular cavity and a supra-plunger cavity in communication with the cylinder cavity, and an additional inverse to a valve installed in the axial channel and communicating the sub-plunger cavity with the cylinder cavity, characterized in that, in order to increase reliability, the body is mounted on the outer surface of the cylinder, the annular cavity is in communication with the sub-piston cavity, and the spring is provided with a spring installed between the plunger and the body , and an additional tube attached to the cylinder and the housing and communicating the supra-plunger cavity with the cylinder cavity. SU „1430638>