Fluid-pressure accumulator

FIELD: hydraulics.

SUBSTANCE: fluid-pressure accumulator comprises cylindrical housing provided with gas and liquid spaces separated by the fluid separator of buoy type and shutoff valve provided with the gate and seat made of truncated cone and arranged on the bottom of the fluid separator and connecting pipe for supplying fluid, respectively. The bottom of the fluid separator is made of the gate having inner conical surface. The seat has outer mating surface.

EFFECT: enhanced reliability and increased longevity.

3 dwg

 

The invention relates to hydraulic accumulators and can be used in various hydraulic systems, for example in the hydraulic control system BOP.

In a pneumatic accumulators accumulation and return of energy occurs due to compression and expansion of gas, and the liquid can be in direct contact with the gas to be separated from him through the membrane, cylinder, piston, float.

Balloon membrane and the batteries are less inertia and have smaller dimensions and weight, but they have limited resources of the rubber separator environments. Piston and float the batteries more durable, but more inertia, which reduces the speed of the hydraulic control system.

Known pneumohydraulic accumulator closest to offer. It includes a housing with a gas and liquid compartments, separated from each other by separator environments float and the valve, equipped with a massive bolt and saddle, which is made in the form of truncated cones and placed respectively on the bottom of the separator media and on the inlet fitting fluid (A.S. No. 1325202).

The disadvantage of this battery is a high inertia separator environments due to its massive gate.

In addition, a large mass of satw the RA reduces the life of the pair of the shutter-saddle.

The fastening bolt to the bottom by means of the mounting element worsens the conditions of installation, the cost of the manufacturing process and reduces the reliability of the site gate-bottom and eventually shut-off valve.

In addition, at high speed discharge of the battery may cause water hammer in the discharge line due to the lack of a smooth speed reduction planting separator environments on a socket.

The purpose of the invention is the reduction of the inertia of the battery, increase the reliability and durability of the shut-off valve and reducing the complexity of its manufacture, eliminating the possibility of water hammer in the discharge line of the hydropneumatic accumulator.

The aim is achieved in that the bottom of the separator environments made in the form of a bolt with an internal conical surface, and the saddle - with outer reciprocal mating surface.

1 shows a pneumatic accumulator, a longitudinal section.

The battery comprises a cylindrical housing 1 in which is formed a gas 2 and liquid 3 cavity, separated between a separator environments 4 float type.

The shutoff valve has a shutter 5, made in the bottom 6 of the separator media 4, and the saddle 7, placed on the fitting 8 for supplying the liquid. And the shutter 5, and the saddle 7 have the shape of a truncated cone, and the shutter 5 of the internal and the seat 7 of the outer cone on which ernesti. The hollow tube 9 communicates the inner cavity 10 of the separator 4 with a gas cavity 2.

Figure 2 and figure 3 shows the installation options additional seal 11 on the bolt 5.

The battery works in the following way.

When the battery is discharged until the locking fitting 8 separator environments 4 shutter 5 in the base plate 6 is removed from the nozzle 8 by a distance determined by the liquid level in the accumulator.

Under the action of gas pressure in the gas cavity 2 separator environments 4 begins to move down in the housing 1 and to displace the liquid in the hydraulic system through the hole in the nozzle 8. At the end of the process of emptying the liquid cavity 3, the displacement fluid is first through the annular gap formed by the inner conical surface of the shutter 5 and the outer conical surface of the seat 7. This displaced fluid flow changes direction, creating a hydrodynamic force directed vertically upwards in the direction of the bottom 6. This causes inhibition of the separator media 4 and, thereby, decrease the speed of his movement. Then the fluid flow is again changed direction and smoothly replaced by the separator environments 4 in the fitting hole 8.

According to the law of classical mechanics, the kinetic energy of the body (in this case, the separator environments 4) depends on the mass and speed of an object and is expressed by the formula

<> ,

where

E - kinetic energy
m is the massseparator environments 4
V - speed

m is reduced by performing plate 6 in the form of a shutter 5;

V is reduced by performing the shutter 5 with an internal conical surface, and the seat 7 with the outer mating response surface, we can conclude that the kinetic energy E of the separator media 4 is reduced, as it directly depends on its mass m and speed V. This allows you to smoothly land the shutter 5, the moving delimited environments 4, the saddle 7 and provide bumpless landing separator 4 to the fitting 8.

Reliable sealing connection saddle-gate is provided with installation of additional seals 11, placed on the shutter 5.

When charging the battery, the working fluid under pressure, charge pressure of the gas acts on the shutter 5 and opens it, walking in the battery, the separator environments 4 POPs up.

No deformation of thin-walled separator 4 under the action of differential pressure is provided by the message of its internal cavity 10 with a gas cavity 2 through the tube 9.

Thus, o is the proposed design of the pneumatic-hydraulic accumulator by executing the plate 6 in the form of the shutter 5 can reduce the kinetic energy of the separator media 4, to reduce the complexity of manufacturing the shutter 5, to increase the reliability and longevity of cut-off valve.

In addition, the combination of reduced inertia separator environments 4 with the proposed form of the shutter 5 and seat 7 allow for a smooth landing gate 5 on the saddle 7 and, thereby, to avoid water hammer in the system.

Pneumohydraulic accumulator containing a cylindrical housing with a gas and liquid compartments, separated from each other by separator environments of the float type, and the shutoff valve equipped with a valve and a seat, which is made in the form of truncated cones and placed respectively on the bottom of the separator media and on the inlet fitting fluid, characterized in that the bottom of the separator environments made in the form of a bolt with an internal conical surface, and the saddle - with outer reciprocal mating surface.



 

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