Method of degassing fluid and device for its implementation

FIELD: testing equipment.

SUBSTANCE: invention relates to technology of pressure test of electro-hydraulic-mechanical systems and can be used for degassing the working fluid in technical devices using in their constructive solutions the flowing hydraulic tanks of open type. The method comprises degassing the working fluid on the grid in the flowing hydraulic tanks, imparting the grid of low-frequency transverse vibration, and at the inlet of the grid by bubbling the gas liquid layer is created with a high-frequency pulsating low-intensity pressure. The flowing hydraulic tank of open type (1) comprises a lid (2), partitions (3, 4), a grid (5), the pipes of discharge (6) and intake (15) of the working fluid, a drain (7), intermediate (18), intake (14) cavities and involves the installation of a grid (5) on the elastic supports (8). Below the grid (5) on the side of the flow outlet into the cavity (18) a pneumatic dynamic vibrator (9) is mounted with the modulated phase of gas oscillation, the outlet nozzle (10) of which is mounted on the grid (5).

EFFECT: invention provides increased efficiency of degassing fluid, the degassing process intensification, which enables to improve and expand the indices of quality of electro-hydraulic-mechanical systems and their components.

2 cl, 1 dwg

 

The invention relates to the technology of hydraulic tests electrohydromechanical systems and their aggregates, such as volumetric hydraulic actuator, feed and discharge of the working fluid in them from the tank open type with degassing therein working fluid.

The known method of purification of liquid from air bubbles on the grid installed in the hydraulic tank (A. S. No. 1211478 And IPC F15B 1/06, publ. 15.02.86 G.), namely that the degassing of the liquid is accomplished by the flow of fluid through vozduhorazdelitelnuju a grid with the vertical part located on the side of the inlet tube. On the grid intensifies the processes of unification of bubbles, which increases the speed of their ascent and decline in the remaining undissolved gas in a liquid.

Known tank for degassing the liquid (A. S. No. 1211478 And IPC F15B 1/06, publ. 15.02.86 g), which includes mounted in the reservoir grid with the possibility of its vertical movement, and mechanism for moving the grid.

The disadvantage of this method and device for degassing liquid is the low efficiency of degassing, which depends on the angle of the mesh to the surface of the liquid (the optimum installation angle of the grid - 30 degree) and its vertical position.

The use of this method and device for degassing of inclined grids leads to a considerable�elicerio dimensions of the tank, the increase of the complexity of their maintenance and repair. The efficiency of degassing of liquid in the hydraulic tanks with sloped nets remains low. Published by the authors of the above A. S. No. 1211478 experimental data in volumetric gas content of the working fluid in the discharge pipe of 3.0% and a purification coefficient of the working fluid is 0.5-0.6.

The basis of the invention is to increase the efficiency of a method and apparatus for degassing fluids on the grid in a flow tank open type electrohydromechanical systems, for example, the hydraulic system of the hydraulic drive through the intensification of the process of degassing at the expense of multistaging of the processing liquid on the grid, which will improve and expand the quality indicators of these systems and their components.

The technical result is achieved in that the intensification of the process of degassing the working fluid in the present method is due to the fact that the grid gives the low-frequency transverse vibration, resulting in shaking of gas bubbles, and at the entrance of the grid method of sparging, which also contributes to the enlargement of the gas bubbles, creating a gas-liquid layer with a high frequency pulsating pressure low intensity.

The flow-through tank for implementing the proposed method of degassing the working fluid is provided with a pneumatic internal�die dynamic vibrator with modulated oscillations of a gas phase, output channel which is installed on the grid on the output side of the stream.

The experimental data obtained ratio of cleaning fluid with a viscosity grade 10-46 from free gas for flow of the hydraulic tank with the proposed device achieves 0.70 to 0.75, which is approximately one and a half times better than analogue. In this case the residual content of free gas in the working fluid during the initial free gas content of 3% less than 1%.

The invention is illustrated a schematic diagram of the flow of the hydraulic tank is presented on the figure.

In a flow tank 1 with a lid 2 is provided with separation walls 3, 4 and grid 5. Draining the working fluid in a flow tank, for example, from the hydraulic system of the hydraulic drive is through the pipe 6 into the drain cavity 7. Primary degassing the working fluid occurs in the partition 3 when the overflow over the top edge. The main degassing the working fluid is produced on the grid 5, which is mounted on an elastic support 8. On the net 5 installed pneumatic dynamic vibrator 9, equipped with a nozzle 10. The gas supply to the vibrator 9 is through the pipeline 11. Between the cover 2 and the surface of the working fluid 12 is formed by the gas chamber 13. From the dispensing cavity 14 separated from the main volume flow of the hydraulic tank baffle wall 4, through Pat�piping set of intake 15 is a liquid intake for example, in the hydraulic system of the hydraulic drive. Monitoring the fluid level is performed by the transmitter 16. Bubble layer 17 of the working fluid in the intermediate chamber 18 separated by 5 grid is created at the entrance grid 5 during operation of the vibrator 9.

Method of degassing the working fluid in a flow tank open type electrohydromechanical system is as follows. Through the pipe 6 drain the fluid with a high gas content in the cavity 7 flow-through tank 1. During the transfer of working fluid from the cavity 7 into the cavity 18 through the partition 3 is the primary degassing in thin layers. The main degassing occurs on the grid 5, which gives the low frequency vibration. At the entrance of the working fluid in the cells of the grid 5 is created by the method of bubbling gas-liquid layer 17 with high frequency pulsating pressure low intensity.

The operation of the device is as follows. Bubble layer 17 of the working fluid creates a high frequency pulsating gas stream of low intensity arising under pressure from the nozzle 10 pneumatic dynamic vibrator 9 with modulated oscillations of a gas phase. The vibrator 9 is installed at the bottom of the grid 5. Low frequency transverse vibration of the grid 5 is created by gas flow from the nozzle 10 through hydrodynamic on�ora when installing the nozzle 10 of the vibrator 9 in the grid 5 on the output side of the fluid flow into the cavity 18, in this case, the grid 5 is mounted on movable bearings 8.

Spin-off from the liquid gas and gas from the vibrator 9 due to the gravitational degassing the liquid enters the gas chamber 13. On the partition 4 separates the foam from the liquid. Degassed liquid from the cavity 14 is supplied to the nozzle of the fence 15.

Technical and economic efficiency of the use of this method of degassing the working fluid and the device for its implementation is to reduce the residual gas content of the working fluid, which is flowing from the tank 1 through the pipe fence 15 is supplied to the hydraulic system of the object, such as a hydraulic actuator, the stabilization performance characteristics of an object, increasing its efficiency, reducing costs for maintenance and repair.

1. Method of degassing the working fluid electrohydromechanical system comprising degassing the working fluid on the grid in a flow tank, characterized in that the grid gives the low-frequency transverse vibration, and at the entrance grid method create bubbling gas-liquid layer with a high frequency pulsating pressure low intensity.

2. Flowing the hydraulic tank to power electrohydromechanical system containing the cover, partition, mesh, drain pipes and intake working fluid, a drain, intermediate, and W�boric cavity, characterized in that the mesh is mounted on elastic supports, at the bottom of the grid on the output side of the pneumatic dynamic flow is a vibrator with modulated phase fluctuations of the gas outlet duct which is installed on the grid.



 

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