RU2449254C2 - Hydrodynamic bench - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: hydrodynamic bench includes chamber with end bulkheads, which is filled with fluid, and guide elements for underwater vehicle, device for its braking operation, air damping cavity, installation system of hydrostatic pressure and attachment point of starting device of underwater vehicle. End bulkhead of chamber with starting device arranged in it is detachable, and braking device is rigidly positioned with starting device by means of rods. At that, at least on two rods there fixed are structures with guide elements in the form of frame brackets, and at least on one of the above structures there installed are sensors fixing underwater vehicle position (movement) at start-up; cable links of the above sensors are arranged together with measuring and recording instruments inside the rod. Strong chamber of hydrodynamic bench is filled with inhibitor, and its damping cavity is filled with inert gas; at that, chamber is equipped with gas or liquid discharge valve as underwater vehicle moves in it during start-up.

EFFECT: increasing operating efficiency and safety of operations.

6 cl, 2 dwg

Description

The invention relates to the field of experimental technology and can be used for experimental determination of the dynamic characteristics of the launching devices of underwater vehicles.

The most famous hydrodynamic stands for technological testing of torpedo tubes (underwater launching devices). So, a test bench for torpedo tubes that use self-propelled torpedoes (RF patent No. 2203469, IPC F41F 3/10, 2003) includes a water tank that simulates an outboard medium, a cable line that determines the direction of free movement of the launch torpedo in the tank, and a device its braking and stopping at the end of the test, as well as measuring, recording and starting equipment.

The disadvantages of such a stand are the large dimensions, the lack of simulated outboard pressure, the inability to test launching devices with power plants for the dynamic dispersal of a technological product (a throw model of an underwater vehicle) to the speeds necessary to safely separate the underwater vehicle from its mobile carrier beyond the launch tube shear.

To eliminate the above drawbacks, hydrodynamic stands are being developed containing a solid chamber filled with water, in which a damping air cavity is organized, which is used to create the necessary hydrostatic pressure in the chamber before testing and simulation conditions for the underwater vehicle to exit beyond its media.

Closest to the present invention, the device is a hydrodynamic stand according to the application No. 2008147919/28 of 04/04/2008 (positive decision on the grant of a patent of 03/29/2010). According to the application, the hydrodynamic stand contains a chamber filled with water, with guide tracks for the underwater vehicle, a device for braking it, an air damping tank, a hydrostatic pressure setting system and an attachment unit for the launch device of the underwater vehicle. The peculiarity of the hydrodynamic stand is that a movable partition is placed in the chamber for demarcating the damping tank and water, made in the form of a piston, with a stop and a limiter limiting its stroke to fix the final position of the piston; a bulkhead with a hinged lid, forming a consumable cavity in which a quick-detachable attachment unit for the launch device of the underwater vehicle, partially located outside the camera, is installed. Moreover, the supply cavity and the chamber are equipped with a pressure equalization system with a damping capacity. Thanks to this arrangement, the launch mode of underwater vehicles is approximated to the actual conditions of their operation at depth.

However, such a device is not without drawbacks.

To test launching devices, in particular transport and launch containers for underwater vehicles, having similar sizes of calibrated parts (for example, 107, 120, 127, 150, etc. mm), there is a need to create new stands, which is accompanied by financial and temporary expenses for their manufacture, as well as complex installation and commissioning.

The accurate installation of non-contact sensors, for example reed switches, reacting to the presence of magnetic marks on the waste models of underwater vehicles, is associated with difficulties in constructively designing mounting places for sensors and the need for a large number of operations for their installation and dismantling, sealing of their cable connections with measuring, recording and control equipment, etc.

When using inhibitors in transport-launch containers (neutral ones that exclude destructive effects on rubber products and corrosion-resistant materials, liquids), the use of water in hydrodynamic stands requires additional operations to fill the starting devices with an inhibitor.

The installation of hydrostatic pressure by air pressurization of the damping cavity of a strong chamber can contribute to the occurrence of emergency situations when the product of an incomplete combustion of fuel from a hot gas generator enters the cavity, energetically providing for the dynamic launch of an underwater vehicle.

To improve the quality of the work of the hydrodynamic bench, it is necessary to increase (up to 10-40 times with respect to the displacement of the throwing prototype) the volume of the damping cavity.

The technical task of the present invention is to expand the operational capabilities of the use of the proposed stand by reducing the time of its re-equipment to work with products of other calibers, relatively close in value.

The technical result is achieved due to the fact that in the hydrodynamic stand containing a solid chamber filled with liquid with end bulkheads, one of which, made removable, has a quick-disconnect mount for mounting the underwater vehicle launcher, a hydrostatic pressure installation system, and a measuring-recording and controlling stand equipment, inside the chamber there are placed a gas-filled damping cavity and a device for braking the underwater vehicle, rigidly positioned gamma with a starting device, with at least two rods fixed to the structure in the form of frame brackets with guiding elements for the underwater vehicle mounted on it, and motion sensors (positions) installed on at least one bar with cable ties missing inside it within the chamber, connected by measuring and recording and control equipment.

The rods introduced into the construct, in addition to solving strength problems, can be used to accurately display the position (motion) sensors of the underwater vehicle relative to the front cut of the launch device, while the cable connections of the sensors to the measurement, recording and control equipment external to the camera, can be partially laid inside at least one of the rods equipped with a device for sealing these cables.

Repeated testing without additional work on filling the transport-launch container with an inhibitor is achieved due to the fact that an inhibitor used in the starting device is used as a liquid to fill a solid chamber.

When using the hot gas generator as an energetic basis for the dynamic start-up of an underwater vehicle, an inert gas, such as nitrogen, can be used in the damping cavity.

A qualitative decrease in the weight and size characteristics of the hydrodynamic bench with a corresponding reduction in costs and an increase in the safety of experimental work can also be achieved by reducing (up to 2-4 displacement values of the underwater vehicle) the volume of the damping cavity by using a system to maintain a constant installation pressure in it, including a gas discharge valve from damping cavity as you enter the camera released from the launch device of the underwater vehicle.

The proposed hydrodynamic stand is presented at:

- Figure 1 is a General view of the inventive device in longitudinal section;

- Figure 2 is a cross section of a device.

The stand contains (Fig. 1) a robust chamber 1, including a shell 2, which is closed with the help of rods 3 by end walls 4, filled with liquid 5 so that a damping cavity is formed in the upper part of the chamber 6. On the end wall 4, a launch protector 7 is installed for underwater apparatus starting block 8, and on the other - the brake device 9. On the rods fixedly mounted (Figure 2) frame brackets 10 with guide elements 11.

On the side of the shell 2 is installed (Figure 1) a relief valve 12 of the system for maintaining a constant pressure in the damping cavity, having a plate 13, a seal 14, a control cavity 15 and a spring supporting 16 and a return 17.

Figure 1 also shows:

- 18 - position sensors layout 7, equipped with an annular magnetic mark 19, relative to the front cut of the launch block;

- 20 - the sensor communication cable 18 installed inside the rod 3 with measuring and recording and control equipment 21 and

- 22 - node sealing cable 20, installed at its exit from the rod 3.

The brake device 9 has a guide block 24 detached by means of spacers 23, which obturates the prototype 25 of the bulkhead 25, a buffer 26 and a durable cover 27.

The hydrodynamic stand works as follows.

Before the test, all the cavity of the stand are under atmospheric pressure, the bleed valve 12 under the action of the return spring 17 is closed.

Using not shown in the diagram of the filling device and ventilation system, the internal cavity of the durable chamber 1 is filled with an inhibitor.

Using the valves of the pressure constant control system in the damping cavity 6 (not shown in the diagram) (for details, see application No.2010000766 dated January 11, 2010), gas (air or inert gas, for example nitrogen) is supplied into it and into the control cavity 15 of the bleed valve 12. until the installation pressure is reached simulating the depth of operation of the launch block 8, which in the cavity 15 is closed by a specially provided valve. The stand is ready for work.

At the command of the equipment 21, the starting block 8 is triggered, the breadboard 7 leaves the chamber 1, which is accompanied by an increase in pressure in the damping cavity 6. Due to the difference in pressure in it and the setting pressure in the control cavity 15 of the bleed valve 12, its plate 13 overcomes the force of the return spring 17, departs from the seal 14, which determines the controlled discharge of gas from the damping cavity 6 and, accordingly, the maintenance of a constant set pressure in it. In the case where the damping cavity is limited, as shown in FIG. 1, by a special cap and the plate 13 of the valve 12 is in contact with the liquid, the pressure in the chamber 1 will be kept constant by the discharge of liquid through the bleed valve 12. This is rational for simulating large depths.

The movement of the layout 7 along the guide elements 11 is fixed by the apparatus 21 using the sensors 18.

After a complete exit from the launch block 8 of the layout 7, its nose end enters the braking device 9. Due to the obturation of the layout 7 in the bulkheads 24, the pressure in the capacitance of the braking device 9 closed by the layout increases, which creates a braking effect on the layout 7. When it approaches the buffer 26 he stops (for more details see RF patent for utility model No. 87510, 2009).

After relieving pressure in the damping cavity 6 and draining the liquid from the solid chamber 1, the launch block 8 can be disconnected from it and prepared for the next work of the stand.

The proposed structural and technological solution of the hydrodynamic stand has another positive feature. It is easily reconfigurable to work with a launch unit equipped with another layout 7, which has a calibrated part that is different in size from the initial one. In this case, when the bottoms are removed from the shell with the rods, in the conditions of the mounting section, another launch block 8 being prepared for operation is installed on the seat in the end bulkhead 4. The guide elements 11 on the frame brackets 10 are replaced and centered for the changed caliber of the layout 7; when the cover 27 of the brake device 9 is removed, removable bulkheads 25 are installed, the position of the sensors 18 on the rod 3 is adjusted according to the need, after which the installation of the stand as a whole is completed.

Thus, qualitatively reduced time spent, and with them financial and labor. In accordance with the new requirements, the inhibitor and the gas supplied to the damping cavity 6 can be replaced.

The proposed technical solution of the hydrodynamic stand provides an increase in the productivity of experimental work and reliable safety of their implementation.

Claims (6)

1. A hydrodynamic stand comprising a chamber with end bulkheads filled with liquid and guiding elements for an underwater vehicle, a device for braking it, an air damping cavity, a hydrostatic pressure setting system, a quick-detachable mounting unit for the launch device of the underwater vehicle, characterized in that the end bulkhead of the camera , with the assembly for mounting the starting device located in it, made removable, the brake device is rigidly positioned by the rods with the starting device, etc. and this with at least two rods fixed structures with guiding elements for the underwater vehicle, and at least one of the rods mounted position sensors (motion) of the latter relative to the front cut of the launch device in launch mode. 2. The hydrodynamic stand according to claim 1, characterized in that the structure with guide elements for the underwater vehicle is made in the form of frame brackets. 3. The hydrodynamic stand according to claim 1, characterized in that the cable connections of the position (motion) sensors of the underwater vehicle with the measuring-recording and control equipment are located inside at least one rod. 4. The hydrodynamic stand according to claim 1, characterized in that the sturdy chamber is filled with an inhibitor. 5. The hydrodynamic stand according to claim 1, characterized in that the damping cavity of the sturdy chamber is filled with an inert gas. 6. The hydrodynamic stand according to claim 1, characterized in that the sturdy chamber is equipped with a valve for discharging gas or liquid for their removal as the underwater vehicle advances at launch.

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