Installation for testing models of ship propulsion

 

The invention relates to experimental hydrodynamics of ship and relates to measuring equipment for testing models of ship propulsion systems in hydrodynamic and ice model basins. The apparatus comprises a housing, a streamlined rack and a basket inside of the elements of the drive mechanism and the propeller shaft. Models of propellers mounted on the opposite cantilever projecting from the gondola ends of the propeller shaft located inside of the guide nozzles. Hour and a gondola equipped with brackets and heels in case gondola rail attachment nozzles and photocontrolled wings. On one of the cantilever protruding parts of the propeller shaft is installed sleeve for fastening ice destruction of items and removable dividing sleeve. The meter of torque contains two sensors in the form of torsional with lesopromyshleny installed respectively on the propeller shaft and on the shaft of the drive mechanism and electrically connected to the current collector. Dynamometer forces on the complex contains manufactured in one piece flanged with rod between them. One flange is connected to the sleeve of the device of the reversal, and the other with the stand. Transverse I. Lansoprazole rods form the sensors of the longitudinal and transverse forces, moments, trim, roll and pitch. The device of the reversal is made discrete and provided with a lock. The invention extends the experimental installation. 2 Il.

The invention relates to experimental hydrodynamics of ship and relates to measuring equipment for testing models of ship propulsion systems in hydrodynamic and ice model basins.

Currently, the widespread use of day provide of the movement and maneuvering of vessels are venerologie column, equipped with propulsion complexes propeller in the guide nozzle. Promising new propulsion system, developed by the company "Schottel-Siemens", STP and SCP in the form of two propellers, open or in the guide nozzles located on both sides of the gondola winterholiday column (WRC). For vessels active ice navigation, in addition to the main propeller, can be installed next to him an additional prop for destruction ice fields and protect the blades of the main propeller and the inlet guide nozzles. Sometimes digitalnet on the body of the gondola WRC. For the design of such propulsion systems, the optimal design parameters appropriate experimental setup for testing of ship propulsion systems in a towing tank basin.

Known installation for testing models of ship propulsion comprising a housing, a streamlined rack and gondola placed within them elements of the drive mechanism and the propeller shaft, cantilever protruding from a gondola with a fixed model of the propeller, placed inside the guide nozzle rigidly attached to streamline the rack and the gondola, the device of the reversal, the meter of torque with the current collector and the dynamometer forces on the complex propeller-nozzle (see ed. mon. The USSR 1093608, CL 63 Century 9/2), adopted us for the prototype.

A disadvantage of the known installation is that it does not provide tests of promising new propulsion type STP and SCP "Schottel-Siemens", made in the form of two propellers, open or in the guide nozzles located on both sides of the gondola azimuth thrusters, and propulsion complexes containing, along with the main propeller screw, ice destruction of the elements in the form of vanes or blades and propulsion systems with x parameters characterizing the operation of the above promising propulsion, when measured by the parameter estimate only averaged values due to the considerable inertia used in the installation of inductive transducers, requiring for its operation a relatively large displacements of the elements of the elastic system of the dynamometer (about 0.1-0.2 mm).

The claimed invention solves the problem of extending the experimental possibilities of the setup for testing models of ship propulsion in hydrodynamic and ice model basins, providing testing as conventional propulsion systems as well as propulsion systems such as STP and SCP, propulsion complexes containing ice destruction of the elements in the form of blades or vanes, and propulsion systems with the guide wings, and the measurement of instantaneous values of torque on each of the propellers installed on both sides of the gondola WRC, longitudinal and transverse forces on the complex, as well as moments of roll, pitch and pitch.

For this installation for testing models of ship propulsion supplemented with the second model of the propeller, mounted on the opposite end of the propeller shaft made console vistabusiness rail attachment nozzles and photocontrolled wings, cantilever protruding portion of the propeller shaft, which is fixed to the first model of the propeller, made elongated and provided with a set on her sleeve for mounting ice destruction of elements in the form of vanes or blades and removable separator sleeve, a meter of torque made of two independent sensors torsions with lesopromyshleny, one of the sensors installed on the propeller shaft and electrically connected to the current collector, mounted on the same shaft, the second sensor measuring the torque is mounted on the shaft of the drive mechanism, and the dynamometer forces on the complex is made in the form of multiple rod system that is between the two flanges, and made in one piece with the flanges, one flange fixed to the unit body, a second flange connected with streamlined stand, with the rods in cross section have the shape of rectangles or squares, the directions of the axes of the cross sections which coincide respectively with the directions of the longitudinal and transverse axes of the installation, and come with lesopromyshleny connected in a measuring bridge, forming the sensors of the longitudinal and transverse forces, moments, trim, roll and pitch, speaking from both sides of the gondola allows to carry out tests on the installation of new advanced propulsion type STP and SCP, the open or in the guide nozzles located on both sides of the gondola WRC. For secure attachment of the second installation guide nozzle and photocontrolled wings streamlined stand is supplied with brackets, and the gondola is flush with its housing heels.

Cantilever protruding portion of the propeller shaft, which is fixed to the first model of the propeller, made elongated and provided with a set on her sleeve and removable dividing bushing. The performance of the propeller shaft allows you to mount it in front of the inlet guide nozzles ice destruction of the elements in the form of vanes or blades (propeller), protecting the head and the blades of the first propeller ice. Removable dividing sleeve provides a step change of the gap between the nasal edge of the nozzle and the cutting plane ice destruction of elements.

The execution of the torque sensor of two separate sensors, one of which is mounted on the propeller shaft, and the second on the vertical shaft of the drive mechanism, provides simultaneous and separate measurement of torque on each propeller screw.

Dynamometer forces and moments on the complex prop - narushiteley in one piece with the flanges. The performance of the elastic system of the dynamometer provides a high dynamic stiffness and stability of its characteristics, including factors influence the measured forces and moments at each other, along with the simplicity of the design, allowing simultaneous measurement of five components of this. The use of lansoprazole pasted on the rods of the dynamometer allows to achieve high dynamic properties of multiple rod system, providing at the same time, a sufficient sensitivity of the measuring sensors.

One of the flanges of the dynamometer (fixed) fixed to the unit body, the second flange (mobile) connected with streamlined stand. The direction of the axes of the cross sections of the rods dynamometer coincide with the directions of the longitudinal and transverse axes of the installation (streamlined rack gondola and propulsion complexes). The performance of the dynamometer and placing it in the setup allows to measure forces and moments on the complex coordinate system propulsion complexes, regardless of the angle of turn of a streamlined racks and gondolas.

The essence of the invention is illustrated by drawings, where Fig.1 shows schematically the installation, side view, cut; n the ri gondolas on the bearings of the propeller shaft 4, on console jutting out of the end 5 of which is placed a model of the propeller 6, is placed inside the guide nozzle 7. Inside a streamlined racks are placed on the bearings of the vertical shaft 8, the lower end of which is via the angular gear 9 is connected with the propeller shaft 4, and its upper end through an angular gear 10 is connected with the drive motor 11. The apparatus comprises a device of the reversal is made in the form of a sleeve 12 that is associated with the nacelle 3 and installed coaxially with the vertical shaft 8, with the 36th evenly distributed on its side wall tapered bores providing discrete reversal streamlined rack 2 and the nacelle 3 with propulsion complex around the vertical axis of the installation. The locking sleeve 12 is a latch 13, which is rigidly on the thread connected to the housing 1, and its tapered end enters the tapered bore of the sleeve 12.

The plant is equipped with the second model of the propeller 14 is mounted on the opposite end of the trial shaft 15 made cantilever protruding from the gondola, and placed inside the second guide nozzle 16. Streamlined strut 2 and the nacelle 3 provided with brackets 17, 18 and sealed flush in the housing gondola heels (Fig.1 not shown), obespechennogo shaft 5 is made elongated and is provided mounted on the shaft sleeve 19 and a removable spacer sleeve 20, providing fastening ice destruction of blades or vanes 21 with the rear fairing with a nut 22, and the possibility of shifting ice destruction of the blades 21 in the longitudinal direction relative to the inlet guide nozzles 7.

In Fig. 1 installation depicted with all elements of propulsion complex subject test: main propeller 6 in the guide nozzle 7, an additional propeller 14 in the guide nozzle 16, ice destruction blades 21, photomanipulate wings 18. The installation will raspalyaet to test for a full set of the features listed above propulsion complex and partial removal of certain elements. The plant is equipped with a meter of torque, made of two independent sensors torsion type.

One torque sensor 23 is performed on the propeller shaft 4 and is equipped with strain gauges 24, which are connected in a bridge measuring circuit and electrically connected with the current collector 25 mounted on the propeller shaft. The second torque sensor 26 is made on a vertical shaft 8 of the drive mechanism, equipped with strain gauges 27 collected in bridge measuring circuit, which elektricheskij on the complex 29, which is made in the form of 8 rods 30 and 31 (Fig.1, figs.2), concluded between the two flanges 32, 33 and manufactured in one piece with the flanges. The upper flange 32 is installed in the housing 1 by bearings and rigidly secured to him by the sleeve 12 and the latch 13. The lower flange 33 is connected with a streamlined stand 2.

The shaft of the dynamometer 30 are cross-sectional shape of squares, peripheral rods 31 are cross-sectional shape of a rectangle (see Fig. 2), the direction of the axes of the cross sections of the rods 30 and 31 coincide respectively with the directions of the longitudinal and transverse axes X, Y installation. The rods 30 are equipped with lesopromyshleny 34 and 35, mounted near the filler rods, and the rods 31 are equipped with lesopromyshleny 36, also anchored near filler rods, and lesopromyshleny 37, 38, mounted symmetrically relative to the middle of the length of the rods (Fig.1).

Relevant lansoprazole connected in a measuring bridge. Lansoprazole 34 form a sensor longitudinal forces, lansoprazole 35 form a lateral force sensor, lansoprazole 36 form the sensor pitch, lansoprazole 37 form a torque sensor trim and lansoprazole 38 th stability of metrological characteristics of the measuring sensors, including the influence coefficients of forces and moments at each other. This allows for the processing of the measuring signals of the sensors on the computer to eliminate the systematic error due to the interaction of the measured parameters.

Due to the fact that the lower flange of dynamometer 33 is connected with a streamlined stand 2, and the locking top flange 32 in the housing 1 of the installation is made after reversal streamlined rack 2 with the nacelle 3 and propulsion complexes at a given angle (for example, relative to the longitudinal axis of the ship), dynamometer 29 carries out measurements of forces and moments in the coordinate system X, Y propulsion of the complex.

The presence in the plant of two independent torque sensors: 23 on the propeller shaft and 26 on the vertical shaft of the drive mechanism allows the simultaneous and separate measurement of torque on each propeller screw, because the sensor 23 measures the torque on the propeller screw 6 and ice destruction blades 21 (if present), and the sensor 26 measures the total torque on the propulsion system as a whole, including the propeller 14.

The device operates as follows.

After completion of the installation, for example, on the model of the vessel, the streamlined stand ice destruction blades 21, propeller 14, the conduit 16, photocontrolled wings 18) using a discrete mechanism of rotation 12, 13 is set at the required angle to the longitudinal axis of the ship and locked into position by storyteller 13. When the tow ship under tow truck in hydrodynamic or ice water tank pool propulsion complexes are hydrodynamic (and ice) forces that are transmitted to the lower movable flange 33 of the dynamometer and distort his rods 30, 31. Deformation of the rods is converted by lesopromyshleny 34, 35, 36, 37, 38 into electrical signals proportional to the current on the installation of longitudinal and transverse forces, moments in pitch, roll, and pitch. Produced by the rotation of a drive motor 11 torque from the propeller 6, 14, and ice destruction of the blades 21 is transmitted to the torque sensor 26. which produces an electrical signal proportional to the magnitude of the total torque acting on the propulsion systems. And torque from the propeller 6 ice destruction of blades 21, in addition, is transmitted to the torque sensor 23, which produces an electrical signal proportional to the value of Diego torque sensor 23 and forces on the dynamometer 29 sequentially are defined blades, or blades 21 and without them. The effect of laboratroy blades or vanes 21 is investigated by changing the distance from the inlet guide nozzles 7 with removable dividing sleeve 20.

Influence photomanipulation wings 18 on the work of propulsion complex investigated by sequential testing propulsion of the complex with wings 18 and without them. While the effect of having photomanipulation wings 18 is estimated by the change in the value of thrust complex, which is measured by the sensor longitudinal force dynamometer 29. When removing photomanipulation wings are installed, they are replaced by sleek brackets similar to the brackets 17. For fastening photomanipulation wings or brackets 18 gondola equipped with flush heels (not shown).

Installation allows you to test a variety of propulsion complexes, including promising propulsion type STP and SCP firm Schottel-Simmens, ice destruction of components that are installed in front of the complex propeller attachment and photomanipulation wings, and provides remote measurement of all key parameters.

Claims

Installation for testing models of the ship on which charisma and propeller shaft, cantilever protruding from a gondola with a fixed model of the propeller, placed inside the guide nozzle rigidly attached to streamline the rack and the gondola, the device of the reversal, the meter of torque with the current collector and the dynamometer forces on the complex, characterized in that the installation was supplemented with the second model of the propeller, mounted on the opposite end of the propeller shaft made cantilever protruding from the gondola and the streamlined strut and nacelle equipped with brackets and flush-mounted in the hull of the gondola heels to allow mounting of the guide nozzles and photocontrolled wing, cantilever protruding portion of the propeller shaft, which is fixed to the first model of the propeller, made elongated and provided with a set on her sleeve to allow fastening ice destruction of elements in the form of vanes or blades and removable separator sleeve, a meter of torque made of two independent sensors torsions with lesopromyshleny, one of the sensors installed on the propeller shaft and electrically connected to the current collector, mounted on the same shaft, the second gauge postergenius system, enclosed between the two flanges and is made in one piece with the flanges, one flange fixed to the unit body through the sleeve device of reversal, a second flange connected with streamlined stand, with the rods in cross section have the shape of rectangles or squares, the directions of the axes of the cross sections which coincide respectively with the directions of the longitudinal and transverse axes of the installation, and come with lesopromyshleny connected in a measuring bridge, forming the sensors of the longitudinal and transverse forces, moments, trim, roll and pitch, and the device of the reversal is made discrete and provided with a lock.

 

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FIELD: experimental hydromechanics; designing of equipment for conducting hydrodynamic and ice searches of marine engineering facility models in model testing basins.

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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