The compression method of the simulated ice fields and device for its implementation

 

The invention relates to shipbuilding and concerns the design of the equipment for pools water tank. The compression method simulated ice field involves the formation of ice edges and application to ice field efforts compression by loading plate is placed along the edge of the field. The edge of the field form by moving immersed in ice plates, which are placed along the sides of the pool. When this plate is fixed to the towing carriage. The compression of the ice field exercise when you pass moving together with a towing carriage plate. Pre-plate load through troubleshoo system calibrated weights. A device for implementing this method, has a system of loading, plate, compressing the ice, and manometer. The system of loading and plate installed on moving along the ice fields tow truck. When this plate is suspended from the holder on an axis, rigidly fastened to the plate and capable of moving relative to the holder. The system loading is made in the form of two mounted on the towing carriage rollers through which is spanned by a flexible connection. A flexible connection connected to odnosi a result of implementation of the invention is to improve reliability of the device to compress the simulated ice fields and the accuracy of determining the amount of compressive efforts, and also in reducing the time for the Department of the simulated ice field from the side of the water tank. 2 S. p. f-crystals, 1 Il.

The invention relates to shipbuilding and relates to the design of the equipment for pools water tank. In particular, it can be used in the ice model tank in motion simulation icebreaker in compressed ice field. When modeling the ice field must be separated from the sides of the pool and concisely specified by the value of the effort. For this purpose, usually hydraulic system loading with sliding panels. Shields down to the edge of the field, create the necessary pressure and hold the towing ship in compressed ice field.

Closest to the proposed technical solution is Stationary testing machine for compression of ice" (I. S. Peschansky. Lagoudera and hladotehnika, Gidrometeoizdat, L., 1967, S. 207), as well as the compression method of the simulated ice fields arising from the operation of this device, taken as a prototype.

The device includes a pumping station, a system of hydraulic actuators, the hydraulic cylinder, the upper and lower plates, compressing the ice, the pressure gauge. The device features a stationary on-Board water tank massacree compression.

However, the known solution has several disadvantages resulting from the need stationary placement of the machine in the ice chamber of the water tank. As a result, when the freezing ice moving parts of the device moribayassa in the field and their prior use has to be cleared of ice. While the actual effort of compression can be determined only approximately by a pressure gauge which indicates the pressure value in the hydraulic system. Also spent a considerable amount of time to separate the ice field from the sides of the pool.

The task of the invention is to improve the reliability of the device for compression of the ice field, the accuracy of determination of the magnitude of the compressive forces and the reduction of time for separation of the ice field from the sides of the pool.

For this purpose, in the known method, including the formation of ice edges and application to ice field efforts compression by loading plate, the edge of the field form by moving along the sides of the pool immersed in the ice plate, mounted on the towing carriage, and compression of the ice field exercise when you pass moving together with a towing carriage plate, which pre-load through trosoban system loading, plate, compressing the ice, and the pressure gauge, system loading and plate installed on moving along the ice fields tow truck, when this plate is suspended from the holder on an axis, rigidly fastened to the plate and capable of moving relative to the holder, and the system loading is made in the form of two mounted on the towing carriage rollers through which is spanned by a flexible link connected at one end with the said axis in the tool holder and at the other end of the suspended calibrated loads.

Loading compressive ice plate calibrated goods can improve the accuracy of the determination of compressive forces and the validity of the obtained experimental data. The formation of the edge of the field by moving the towing carriage plate allows to reduce the time of preparation of the experiment and, thus, reduce the time drift of physico-mechanical properties of ice.

The proposed design of the device allows to considerably simplify the system load and to increase the reliability of its work in the conditions of the refrigerating chamber.

The invention is illustrated in the drawing.

To the base 1 tow truck, moving on wheels along the pool 2 p is imusa ice plate 7, placed in the ice box 8. To the end of the axis 6 is attached a flexible connection in the form of a cable 9, through which the rollers 10 connects the axis 6 with the suspension 11, hosts calibrated cargo 12. The rollers 10 and the model tested in the ice field of the vessel 13 is attached to the base 1.

Shrinking ice fields using the proposed device is as follows. Collect the device according to the scheme shown in the drawing, not loading plate 7 cargo 12. Drive the tow truck 1 and cut a channel 14, which separates the ice from the sides of the pool 2. Then return the cart 1 in the initial position, attach it to the model of the vessel 13 and mounted on the suspension 11 cargo 12. At the same time on the ice field, the pressure is equal towhere G is the calibrated weight of cargo, h1- ice thickness, L is the length of the plate.

Then drive the tow truck 1 with bogatoi plate 7 and the compressed ice that determine the magnitude of the towing resistance of the ship.

To estimate order-of-magnitude consider a specific example. Suppose you want to implement a compression rate of 1 point at which p=2 kPa. Take L= 5 m, h1= 0.03 m, then the calibrated weight of the goods is equal to G=ph1L= a, including education in the ice field edges and application to ice field efforts compression by loading plate is placed along the edge of the field, characterized in that the edge of the field form by moving immersed in ice plate, mounted on the towing carriage, along the sides of the pool, and compression of the ice field exercise when you pass moving together with a towing carriage plate, which pre-load through troubleshoo system calibrated loads.

2. A device for compression of the simulated ice fields, including the loading plate, compressing the ice, and the pressure gauge, wherein the system loading and the plate is installed on moving along the ice fields tow truck, when this plate is suspended from the holder on an axis, rigidly fastened to the plate and capable of moving relative to the holder, and the system loading is made in the form of two mounted on the towing carriage rollers through which is spanned by a flexible link connected at one end with the said axis in the tool holder and at the other end of the suspended calibrated loads.

 

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SUBSTANCE: proposed device includes towing trolley with frame rigidly secured on it; this frame is provided with bar which is connected with model through dynamometers and bearing plate. Dynamometers form three-support force-measuring system; they are provided in each support in form of two interconnected elastic members; one elastic member is made in form of five-rod member provided with longitudinal and lateral force sensors; it is located between two flanges. Second elastic member of dynamometer is made in form of membrane-type elastic member whose membrane is located between rigid rim and rigid central part of this member provided with threaded rod with elastic hinge mounted over vertical axis perpendicularly relative to membrane. Membrane, rim and rigid central part with threaded rod and elastic hinge are made integral. Rim of membrane elastic members is rigidly connected with one of flanges of five-rod elastic member in such way that threaded rod is located along vertical axis of support and is rigidly connected via elastic hinge with bearing plate secured on model. Membrane is provided with resistance strain gages forming vertical force measuring bridge. Second flange of each five-rod member is connected with additional bearing plate secured on bar.

EFFECT: enhanced accuracy of measuring forces and moments.

3 dwg

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