KR20190095680A - Apparatus for pitch feedback of controllable pitch propeller - Google Patents

Abstract

The present invention relates to a pitch feedback apparatus for a variable pitch propeller, and more specifically, to a pitch feedback mechanism, which minimizes complexity of a feedback structure identifying a pitch change of a blade and exactly transfers an angle position of a variable pitch propeller to a hydraulic unit controller through a follow-up member, thereby comparing an actually changed pitch with an ordered pitch based on immediate decoding of a pitch position of an actual blade in the hydraulic unit controller to precisely process pitch control of the blade.

Description

Pitch feedback device of variable pitch propeller {APPARATUS FOR PITCH FEEDBACK OF CONTROLLABLE PITCH PROPELLER}

The present invention relates to a pitch feedback device of a variable pitch propeller, and more particularly, to minimize the complexity of the feedback structure for confirming the pitch change of the blade, and the hydraulic position of the variable pitch propeller through a follow-up member By accurately transmitting to the unit controller, a hydraulic feedback controller relates to a pitch feedback mechanism that allows the blade unit to precisely handle pitch control by comparing the commanded pitch with the actual modified pitch based on an immediate reading of the actual blade pitch position.

Recently, most ships employ thrusters, which are side thrust generators to improve the maneuverability of the ship when the ship docks or docks.

The thruster is a device for easily maneuvering when the ship is about to turn quickly, and has a variable pitch propeller installed in the transverse tunnel at the bottom of the bow or stern.

In addition, the thruster can be used as a substitute for the tug when the tuition fee is expensive and it is difficult to secure the tug according to the circumstances of the port, and can obtain an auxiliary effect such as using a tug for the bow and the stern.

On the other hand, in order to precisely drive the thruster, it is necessary to check whether the pitch position of the variable pitch propeller is accurately changed based on the command command by the captain or the steering man in the bridge.

For this purpose, a follower member (or feedback member) is provided in the thruster of the ship to transmit information on the pitch change of the blade to the hydraulic unit controller.

The follower member supplies power oil to a pitch setting hydraulic motor installed at a hub of the variable pitch propeller to transmit information related to the pitch change of the blade actually moved according to a command commanded to the hydraulic unit controller for controlling the pitch change of the blade. As a component part, it is connected between an oil distribution pipe and a control valve which supply power oil to the pitch setting hydraulic motor, and the hydraulic unit controller. At this time, it is very important that the follower member accurately reflects the actual pitch setting of the blade to the hydraulic unit controller.

However, the above-described conventional tracking member has a large number of parts and a very complicated structure when transferring information related to the pitch change of the blade to the hydraulic unit controller. There was a problem that could not be correctly delivered to the hydraulic unit controller. That is, when the hydraulic unit controller does not receive accurate information on the pitch change of the blade from the following member, there is a problem in that the thruster is not precisely controlled.

Therefore, in the present invention, by simplifying the structure of the following member for checking the pitch change of the blade to minimize the complexity of the feedback structure, by accurately transmitting the angular position of the variable pitch propeller according to the pitch change of the blade in the following member to the hydraulic unit controller Therefore, the present invention proposes a method for precisely controlling the pitch of the blade.

Next, the prior art existing in the technical field of the present invention will be briefly described, and then the technical matters to be made differently from the prior art will be described.

First, U.S. Patent No. 378187 relates to a controllable pitch propeller device of the type having a hydraulic piston and a cylindrical motor at the propeller hub for efficient pitch setting. The follower or feedback member, which is transmitted to or from the motor via the motor and provides a reading of the actual pitch, is isolated so as not to be affected by the temperature of the power oil, and the follower or feedback member is moved against the circumference of the assembly. It is preferred to arrange as a central member of the embedded arrangement radially spaced from the feedback member. Preferably the feedback member and the oil tube are arranged as a single bundle consisting of a plurality of sections, wherein the oil tube of each section is provided with a sliding seal in the section engagement, such that the temperature expansion and contraction of the oil tube is caused by the sliding seal in each section. It is absorbed and does not affect the overall length of the burnt or feedback member to prevent or minimize false pitch feedback signals. The follower member is tubular and the air tube supplies air to the propeller blades.

However, according to the prior art, the arrangement for the control arrangement in the prior art has a configuration difference that cannot be applied to thruster conditions because the following spool and the following lever must be located in the same compartment. In addition, the main arrangement of controllable pitch propeller (CPP) control systems with ship shafting is not permitted for thruster devices.

U.S. Patent No. 5,566,566 also provides a ship's azimuth propeller drive assembly for providing measurements of azimuth and attack angles of a variable pitch propeller blade, the vessel comprising a first housing rigidly coupled to the ship. Azimuth propeller drive means for propulsion, a second housing rotatably mounted to said first housing, a first drive shaft having a first coaxial bore, first and second ends, and said first coaxial bore Extending through and having an upper section and a lower section, the upper section extending beyond the first end and the lower section extending beyond the second end, the first end being connected to an engine of the ship And, coaxially extending through the center bore of the tube and rotatable with respect to the tube, having an upper portion and a lower portion, wherein the upper portion An upper portion extending beyond the upper portion and the lower portion extending beyond the lower portion to be rigidly connected within the second housing, the first drive shaft being connected from the connection with the engine through the first housing to the second housing; Extends in the second housing, the second end has a first rod mounted in the second housing, a second coaxial bore, a propeller end and a drive end, coupled at the drive end to be driven by the first drive shaft and The propeller end extends through the wall portion of the second housing from the drive end with the propeller end mounted to the propeller assembly, wherein the propeller assembly includes a plurality of variable pitch blades and a servo for varying the attack angles of the plurality of variable pitch blades. And a second drive shaft, located in the second housing, the first operating end and the second A translation system having an operating end, extending within the second coaxial bore, having a servo end and a translational end, the servo end connected to the servo, and the translational end connected to the first operating end Axial displacement along the second coaxial bore in response to a change in the attack angle of the plurality of variable pitch blades by the servo, the second actuating end being connected to the lower section of the tube. A second rod and means for indicating an angular displacement of the tube and an angular displacement of the first rod, the means being connected to the upper section of the tube and the upper portion of the first rod.

However, compared with the feedback structure proposed in the present invention, the transfer lever system of the prior art is very complicated and does not transmit the exact position of the propeller blade, so the difference in the technical configuration is obvious.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a pitch feedback mechanism that minimizes the complexity of the feedback structure by simplifying the structure of the following member for checking the pitch change of the blade.

The present invention also accurately transmits the angular position of the variable pitch propeller according to the pitch change of the blade in the following member to the hydraulic unit controller, so that the commanded pitch and the actual changed pitch are based on the immediate reading of the actual blade pitch position in the hydraulic unit controller. It is another object to provide a pitch feedback mechanism that allows to precisely perform the pitch control of the blade in comparison with the.

In another aspect, the present invention is equipped with a pitch setting hydraulic member to the propeller hub, connecting the following member between the oil distribution pipe for controlling the supply of the power oil and the control valve and the hydraulic unit controller, the hydraulic unit controller to transfer from the following member It is a further object to provide a pitch feedback mechanism that allows an immediate reading of the actual blade pitch position based on the angular position being achieved.

It is another object of the present invention to provide a pitch feedback mechanism that can be applied to not only thrusters but also general variable pitch propeller systems or aircraft propulsion systems associated with propellers.

Pitch feedback device of a variable pitch propeller according to an embodiment of the present invention, the pitch is installed in the propeller hub, the pitch for changing the pitch of the blade by performing the reciprocating movement of the piston by the oil supplied through the oil distribution pipe and the control valve And a follower member connected between the set hydraulic member and the oil distribution pipe and the hydraulic unit controller, and converting the moving distance of the pitch set hydraulic member into angular information to change the pitch of the blade to the hydraulic unit controller. It is characterized by.

Also, the pitch feedback device reads the pitch position of the blade immediately based on the angle information transmitted from the following member, compares the commanded pitch with the actual changed pitch based on the read result, and compares the A hydraulic unit controller for performing the pitch control is characterized in that it further comprises.

The pitch feedback device is connected to an upper portion of the control valve, and is inserted into an oil distribution pipe and a hollow shaft for supplying and recovering oil to the piston based on the control of the hydraulic unit controller. And an oil pipe connected to the control valve and connected to the piston of the pitch setting hydraulic member.

The oil pipe may be in close contact with the pitch setting hydraulic member to move the position of the oil distribution pipe by the distance of the pitch setting hydraulic member to change the pitch of the blade.

In addition, the pitch setting hydraulic member, the blade, a crank ring for converting the reciprocating motion of the piston into a rotational movement for changing the pitch of the blade, a slider inserted into the space on one side of the crank ring, is formed inside the slider, And a piston for rotating the crank ring to change the pitch of the blade and a piston for performing a reciprocating motion for changing the pitch of the blade by oil supplied through the oil distribution pipe.

In addition, the pitch feedback device, the piston moves horizontally by a distance h by the high pressure oil supplied from the oil distribution pipe, and the pin rotates the crank ring by the angle θ through the slider at the same time as the piston moves. Change the pitch of the blade, and when the distance between the center of the crank ring and the center of the pin is a, the relationship between the moving distance h of the pin and the rotation angle θ of the crank ring is h = a * tanθ It is characterized by.

In addition, the piston is formed on one side of the piston yoke, the piston yoke, the first space connected to the control valve via the oil pipe inserted into the shaft and the other side of the piston yoke corresponding to the first space. And a second space connected to the control valve through a circular space formed between the inner wall of the shaft and the oil pipe.

In addition, the pitch feedback device to change the pitch of the blade through the reciprocating motion of the piston in either direction and the opposite direction according to the supply and withdrawal of the oil to the first space and the second space of the piston. It is characterized by.

In addition, the following member is formed in a pin shape, one side is fixed to the oil distribution pipe, the other side is coupled through the lever slider and the rail slider, the same direction as the oil distribution pipe moving in accordance with the horizontal movement of the pitch setting hydraulic member A pusher for moving to a rail having a guide groove formed therein, a lever having a guide groove formed therein, and inserted into the rail, the pusher penetrated and coupled to a central portion thereof, and with the pusher along a guide groove formed in the rail. The rail slider being moved, fixed to one side of the rail slider, inserted into the lever, the pusher penetrates and is coupled to the center portion, and moves together with the rail slider and the pusher along a guide groove formed in the lever. A lever slider, a shaft coupled between the lever and the execution link and the sharp It characterized in that it comprises an execution link for transmitting the angle information by the pitch change of the blade transmitted through the hydraulic unit controller.

In addition, the pitch feedback device, the oil pipe in close contact with the pitch-setting hydraulic member in accordance with the distance h, the piston moves the oil distribution pipe connected to the pusher horizontally by a distance h1, the movement of the pusher Is carried out along the rail on the rail slider, and by the movement of the pusher, the lever is rotated by an angle θ1 about the axis of the shaft by means of the lever slider, wherein the angle θ1 is the distance h at which the piston has moved. The angle signal θ1 rotated on the basis, and the rotated angle signal θ1 is transmitted to the hydraulic unit controller through the execution link, and when the distance between the center of the oil distribution pipe and the center of the shaft is a1, the rail and The relationship between the moving distance h1 of the lever and the angle θ1 is characterized by h1 = a1 * tanθ1.

According to the pitch feedback device of the variable pitch propeller of the present invention as described above, by simplifying the structure of the following member for confirming the pitch change of the blade to minimize the complexity of the feedback structure, the variable in accordance with the pitch change of the blade in the following member By precisely transmitting the angular position of the pitch propeller to the hydraulic unit controller to perform an immediate reading of the actual blade pitch position in the hydraulic unit controller, precisely controlling the pitch of the blade by comparing the commanded pitch with the actual changed pitch. It has an effect.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the conventional Kamome TCB type thruster.
2 is a view showing the configuration of a conventional Finkatery HMC type thruster.
3 is a view showing the configuration of a conventional Kawasaki KT-B5 type thruster.
4 is a view showing in detail the configuration of the pitch feedback device of the variable pitch propeller according to an embodiment of the present invention.
5 is a view showing in detail the configuration of the following member of FIG. 4.
FIG. 6 is a cross-sectional view taken along line AA of FIG. 4 at a blade neutral position of a pitch feedback device of a variable pitch propeller according to an exemplary embodiment of the present invention.
FIG. 7 is a view for explaining a driving mechanism in a state in which the pitch of the blade of FIG. 6 is changed by about 30 degrees.
8 is a flowchart illustrating in detail an operation process of a pitch feedback apparatus of a variable pitch propeller according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the pitch feedback device of the variable pitch propeller of the present invention. Like reference numerals in the drawings denote like elements. In addition, specific structural to functional descriptions of the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the present invention, and unless otherwise defined, all terms used herein including technical or scientific terms These have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. It is preferable not to.

First, prior to the detailed description of the present invention, a feedback mechanism of a thruster in use will be described.

1 is a view showing the configuration of a Kamome TCB-type thruster, a blade 1 and a crank ring 2 which performs a function of changing a reciprocating motion of a piston to a rotational motion for changing a pitch of the blade 1. ), An oil pipe 6 for reciprocating the piston by supplying oil to the piston through a slider 3 and a pin 4 connected to the crank ring 2, a piston yoke 5, and an oil distribution pipe. ), A pusher (7) connected to one side of the oil distribution pipe and operating in conjunction with the oil distribution pipe moving by the reciprocating motion of the piston, a rail (8) for guiding the movement of the pusher (7), the rail The pusher 7 and the transfer shaft, which are connected to the hydraulic unit controller, which is an executive component of the bolting lever 9, the transfer shaft 10, and the control valve connecting the 8 and the transfer shaft 10. Blood of the blade (1) being passed through (10) And a running link 11 to pass the motion information according to the change in the oil pressure unit controller.

2 is a view showing the configuration of a Finkatery HMC type thruster, which includes a blade 21, a crank ring 22, a slider 23, a pin 24, a piston yoke 25, an oil pipe 26, and an oil powder. And an execution link 32 which can be connected to the hydraulic unit controller, which is an execution configuration of the piping 27, the pusher 28, the rail 29, the bolting lever 30, the transfer shaft 31, and the control valve. As shown in FIG. 1, the thruster of FIG. 2 transmits the motion information by the pitch change of the blade 21 transmitted through the pusher 28 and the transfer shaft 31 to the hydraulic unit controller. do.

3 is a view showing the configuration of a Kawasaki KT-B5 type thruster, the blade 41, the crank ring 42, the slider 43, the pin 44, the piston yoke 45, the oil pipe 46, A pusher 47, an angle lever 48, a transfer shaft 49, and an execution link 50 which can be connected with the execution configuration of the control valve.

The thrusters shown in Figs. 1 to 3, respectively, will be described. The hydraulic unit controller is an execution configuration for controlling the drive of the control valve of the hydraulic system from the blade rotating mechanism and the rotating blade to each of the thrusters of Figs. The mechanisms for transmitting angle signals are different. The angle signal is also reached in the hydraulic unit controller, which is an implementation configuration in the modified form necessary to operate.

This pitch indicating mechanism of FIGS. 1 to 3 is a disadvantage in that the lever system between the oil pipe 6 and the conveying shaft 10 is complicated. In addition, the mechanism for connecting the oil pipe 6 with the hydraulic unit controller, which is a running configuration, is a different kind of mechanism compared to the blade turning mechanism, and it is a signal for the blade pivot angle and a control valve of the hydraulic system. A complex measurement of the signal for translation of the piston yoke sent is necessary.

The present invention is to solve such a problem that occurs in the conventional thruster, the angular position of the variable pitch propeller according to the change of the pitch of the blade is accurately transmitted to the hydraulic unit controller to immediately determine the actual blade pitch position in the hydraulic unit controller The reading is performed, and based on this, the pitch control of the blade is precisely performed.

4 is a view showing in detail the configuration of the pitch feedback device of the variable pitch propeller according to an embodiment of the present invention, Figure 5 is a view showing in detail the configuration of the following member of FIG.

4 and 5, the pitch feedback device of the present invention is the oil distribution pipe 100, oil pipe 200, pitch setting hydraulic member 300, following member 400, hydraulic unit controller 500 ) And the like. That is, according to the present invention, the pitch setting hydraulic member 300 is mounted on a propeller hub, and the following member 400 is disposed between the oil distribution pipe 100 and the hydraulic unit controller 500 for controlling the supply of power oil. In this connection, the hydraulic unit controller 500 performs an immediate reading of the actual blade pitch position based on the angle information transmitted from the follower member 400.

The oil distribution pipe 100 serves to supply or reversely recover oil for changing the pitch of the blade to the piston 350 of the pitch setting hydraulic member 300.

At this time, the oil distribution pipe 100 is installed in a form surrounding the outside of a control valve (not shown) inserted into one side of the oil pipe 200, it is connected to the pump of the hydraulic unit controller 500.

The oil pipe 200 is inserted in the longitudinal direction in the shaft formed in a hollow, one side is connected to the oil distribution pipe 100 and the control valve, the other side is connected to the piston 350 of the pitch setting hydraulic member 300 do. Specifically, it is connected to the first space 352 formed in the piston 350.

In addition, the oil pipe 200 is in close contact with the pitch setting hydraulic member 300, and the position of the oil distribution pipe 100 by the distance traveled by the pitch setting hydraulic member 300 to change the pitch of the blade. Move it. That is, the oil distribution pipe 100 coupled to the control valve inserted into one side of the oil pipe 200 in accordance with the movement of the piston 350 to perform the reciprocating motion by the supply of oil in the same direction.

The pitch setting hydraulic member 300 is installed on the hub side of the propeller to perform a rotating mechanism for changing the pitch of the blade, the piston 350 by the oil supplied through the oil distribution pipe 100 and the control valve. Change the pitch of the blade.

At this time, the pitch setting hydraulic member 300 is a blade 310, a crank ring 320 for converting the reciprocating motion of the piston 350 into a rotary motion for changing the pitch of the blade 310, and the crank ring ( A slider 330 inserted into one side space of the 320, a pin 340 formed inside the slider 330, and rotating the crank ring 320 to change the pitch of the blade 310; It is composed of a piston 350 for performing a reciprocating motion for changing the pitch of the blade 310 by the oil supplied through the oil distribution pipe 100.

In addition, the piston 350 is formed on one side of the piston yoke 351 and the piston yoke 351, and is connected to the oil distribution pipe 100 and the control valve through the oil pipe 200 inserted into the shaft. The oil is formed on the other side of the first space 352 and the piston yoke 351 corresponding to the first space 352, and is formed through the circular space formed between the inner wall of the shaft and the oil pipe 200. The second pipe 353 is connected to the distribution pipe 100 and the control valve.

That is, the piston 350 has a function of changing the pitch of the blade through a reciprocating motion in one direction and the opposite direction according to the supply and recovery of oil to the first space 352 and the second space 353. For example, the piston 350 is moved to the right by the high pressure oil supplied to the first space 352 through the oil distribution pipe 100, the control valve and the oil pipe 200. At the same time, a low pressure oil filled in the first space 352 of the piston 350 and the corresponding second space 353 is formed between the shaft and the oil pipe 200, the control valve and the oil. It is recovered through the distribution pipe (100).

The following member 400 is installed on the opposite side of the propeller hub to perform a pitch feedback mechanism for transferring the pitch change of the blade to the hydraulic unit controller 500. The oil distribution pipe 100 and the hydraulic unit It is connected between the controller 500, and converts the moving distance of the pitch setting hydraulic member 300 for changing the pitch of the blade to angular information to transmit to the hydraulic unit controller 500.

That is, through the information transmitted from the follower member 400, the hydraulic unit controller 500 confirms that the changed pitch of the actual blade coincides with the commanded pitch, and is to help to operate the control valve based on this. . Therefore, it is very important that the following member 400 accurately reflects the actual pitch setting of the blade.

At this time, the following member 400 is composed of a pusher 410, rail 420, lever 430, rail slider 440, lever slider 450, shaft 460, execution link 470.

The pusher 410 is formed in a pin shape, one side is fixed to a fixed piece formed extending from the lower portion of the oil distribution pipe 100, the other side is coupled through the lever slider 450 and the rail slider 440 do.

In addition, the pusher 410 moves in the same direction as the oil distribution pipe 100 that moves according to the horizontal movement of the pitch setting hydraulic member 300 (that is, the reciprocating motion of the piston 350).

The rail 420 has a guide groove formed therein, and a rail slider 440 moving along the guide groove is inserted therein.

The lever 430 has a structure similar to that of the rail 420, and has a guide groove formed therein, and a lever slider 450 moving along the guide groove is inserted therein.

The rail slider 440 is inserted onto the rail 420, the pusher 410 penetrates and is coupled to a center portion thereof, and moves together with the pusher 410 along a guide groove formed in the rail 420. .

The lever slider 450 is fixedly coupled to one side of the rail slider 440, is inserted into the lever 430, and the pusher 410 penetrates and is coupled to the center of the lever 430. The rail slider 440 and the pusher 410 are moved along the guide groove formed. That is, the pitch setting hydraulic member 300 is moved along the guide groove provided on the lever 430 together with the rail slider 440 moved by the movement of the pusher 410 to rotate the shaft 460. By converting the moving distance of the into an angle information to be transmitted to the hydraulic unit controller 500 through the execution link (470).

The shaft 460 is formed in a pin shape to connect between the lever 430 and the execution link 470.

The execution link 470 transmits the angular information by the pitch change of the blade transmitted through the shaft 460 to the hydraulic unit controller 500.

The hydraulic unit controller 500 immediately reads the pitch position of the blade based on the angle information transmitted from the following member 400. In other words, by converting the angular information input as analog data into digital data, the pitch distance that the blade is actually moved is read, and the information is displayed so that the captain or the helmman can quickly check the blade pitch information.

In addition, the hydraulic unit controller 500 compares the commanded pitch with the actual changed pitch based on the reading result, and checks whether the pitch of the normal blade is changed based on the comparison result to set the pitch through the oil distribution pipe 100. The oil supply to the hydraulic member 300 is precisely controlled.

FIG. 6 is a cross-sectional view taken along line AA of FIG. 4 in a blade neutral position of a pitch feedback device of a variable pitch propeller according to an exemplary embodiment of the present invention, and FIG. 7 is a pitch of the blade of FIG. It is a figure for demonstrating the drive mechanism of a state.

6 and 7, the rotation mechanism for changing the pitch of the blade in more detail, based on the control of the hydraulic unit controller 500 through the oil distribution pipe 100 and the oil pipe 200 The high pressure oil is supplied to the piston 350, and the slider 330, the pin 340 and the piston 350 move to the right by the distance h by the high pressure oil.

In addition, through the slider 330, the pin 340 is rotated clockwise by an angle θ as shown in FIG. That is, the crank ring 320 is rotated by an angle θ with the horizontal movement of the piston 350 to change the pitch of the blade.

When the rotation mechanism for changing the blade pitch is performed, a pitch feedback mechanism for transmitting the pitch change of the blade to the hydraulic unit controller 500 through the following member 400 is performed.

That is, when the rotation for changing the blade pitch is made, the oil pipe 200 in close contact with the piston 350 is connected to the oil distribution pipe 100 to which the pusher is connected according to the distance h of the piston 350 moving. The pusher 410 is moved along the rail 420 on the rail slider 440.

In addition, the lever 430 is rotated by the angle θ1 about the axis of the shaft 460 through the lever slider 450 by the movement of the pusher 410, wherein the angle θ1 is the piston 350 It is equal to the angle θ rotated based on this moved distance h.

The angle signal θ1 is also transmitted to the hydraulic unit controller 500 via the execution link 470.

Here, the distance between the center of the crank ring 320 and the center of the pin 340 is a, the distance between the center of the oil distribution pipe 100 and the center of the shaft 460 is a1, h When = h1, θ = θ1, a = a1, the relation between the moving distance h of the pin 340 and the rotation angle θ of the crank ring 320 is defined as h = a * tanθ, and the rail 420 ) And the moving distance h1 of the lever 430 and the angle θ1 are defined as h1 = a1 * tanθ1.

Also, if the geometry of the rotation mechanism for pitch change of the blade and the details of the pitch feedback mechanism are the same, the lever 430 repeats the movement of the crank ring 320 accurately. In addition, since the type of the blade drive mechanism and the lever transmission mechanism type are the same, the pitch feedback mechanism of the present invention can accurately transmit the rotation of the blade to the hydraulic unit controller 500.

Next, an operation process of the pitch feedback device of the variable pitch propeller according to the present invention configured as described above will be described in detail with reference to FIG. 8. At this time, each step according to the operation process of the present invention can be changed in order by the environment or those skilled in the art.

8 is a flowchart illustrating in detail an operation process of a pitch feedback apparatus of a variable pitch propeller according to an exemplary embodiment of the present invention.

First, it is determined whether the hydraulic unit controller 500 needs to change the pitch of the variable pitch propeller (S100). In other words, the captain or crew judges whether to operate the thruster and change the pitch in order to dock or dock the ship in the port.

If it is determined in step S100 that the pitch of the variable pitch propeller needs to be changed, the hydraulic unit controller 500 operates the oil pump to set the pitch setting hydraulic member through the oil distribution pipe 100, the control valve and the oil pipe 200. The high pressure oil supply is controlled by the piston 350 of 300 (S200).

The slider 330, the pin 340, and the piston 350 are moved by the distance h by the high pressure oil, and the pin 340 is rotated by the angle θ through the slider 330 (S300). At this time, the distance and the rotation angle to move by the high pressure oil is different depending on how much the pitch of the blade is changed.

For example, as shown in FIG. 4, the oil is supplied by the high pressure oil supplied to the first space 352 of the piston 350 through the oil distribution pipe 100, the control valve and the oil pipe 200. The crank ring 320 is rotated by an angle θ at the same time as the distance h is moved to change the pitch of the blade. In addition, contrary to the above description, the high pressure oil is supplied to the second space 353 of the piston 350 through a circular space formed between the oil distribution pipe 100, the control valve and the shaft, and the oil pipe 200. The crank ring 320 is rotated by an angle -θ while being moved to the left side by the left side to change the pitch of the blade.

When the rotation mechanism for changing the blade pitch is performed through the step S300, a pitch feedback mechanism for transferring the pitch change of the blade to the hydraulic unit controller 500 is performed through the following member 400.

In more detail, the oil pipe 200, which is in close contact with the piston 350, distances the oil distribution pipe 100 to which the pusher is connected according to the distance h of the piston 350. It is moved to the right by h1 (S400).

In response to the movement of the pusher 410, the lever 430 is rotated by an angle θ1 about the axis of the shaft 460 through the lever slider 450 (S500), and the angle signal θ1 is executed. It is transmitted to the hydraulic unit controller 500 through the link 470 (S600).

Then, the hydraulic unit controller 500 immediately reads the pitch distance at which the blade is substantially moved based on the angle information transmitted from the following member 400 (S700), and based on the read result, the commanded pitch and the actual changed pitch are read. In comparison, the oil supply provided to the pitch setting hydraulic member 300 is controlled by checking whether a normal blade pitch is changed (S800).

That is, the hydraulic unit controller 500 displays the pitch change information of the blade read in step S700 and intuitively checks whether the pitch commanded by the captain or crew matches the actually changed pitch, and based on this, Controlling the oil supply allows precise control of the oil supply.

Meanwhile, the pitch feedback device according to the present invention can be applied to an aircraft propulsion system related to a general variable pitch propeller system or a propeller, in addition to a thruster.

As such, the present invention minimizes the complexity of the feedback structure by simplifying the structure of the following member for checking the pitch change of the blade, and accurately transmitting the angular position of the variable pitch propeller according to the pitch change of the blade in the following member to the hydraulic unit controller. Since the immediate reading of the actual blade pitch position can be performed, the pitch control of the blade can be precisely performed by comparing the commanded pitch with the actual changed pitch.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art to which the art belongs, various modifications and equivalent other embodiments therefrom I understand that it is possible. Therefore, the technical protection scope of the present invention will be determined by the claims below.

100: oil distribution pipe 200: oil pipe
300: pitch setting hydraulic member 310: blade
320: crank ring 330: slider
340: pin 350: piston
400: following member 410: pusher
420: rail 430: lever
440: rail slider 450: lever slider
460: shaft 470: running link
500: hydraulic unit controller

Claims (7)

A pitch setting hydraulic member installed at the propeller hub to change the pitch of the blade by reciprocating the piston by oil supplied through the oil distribution pipe and the control valve; And
And a follower member connected between the oil distribution pipe and the hydraulic unit controller and converting the moving distance of the pitch setting hydraulic member into angle information to change the pitch of the blade to the hydraulic unit controller. Pitch feedback device of a variable pitch propeller. The method according to claim 1,
The pitch feedback device,
A hydraulic unit that immediately reads the pitch position of the blade based on the angle information transmitted from the following member, compares the commanded pitch with the actual changed pitch based on the read result, and performs pitch control of the blade based on the comparison result Controller;
An oil distribution pipe connected to an upper portion of the control valve and configured to supply and recover oil to the piston based on the control of the hydraulic unit controller; And
Is inserted into the hollow shaft, one side is connected to the oil distribution pipe and the control valve, the other side is an oil pipe connected to the piston of the pitch setting hydraulic member; further includes,
The oil pipe,
The pitch feedback device of the variable pitch propeller, which is in close contact with the pitch setting hydraulic member and moves the position of the oil distribution pipe by the distance of the pitch setting hydraulic member to change the pitch of the blade. The method according to claim 1,
The pitch setting hydraulic member,
blade;
A crank ring for converting the reciprocating motion of the piston into a rotational motion to change the pitch of the blade;
A slider inserted into one side space of the crank ring;
A pin formed inside the slider and rotating the crank ring to change a pitch of the blade; And
And a piston for performing a reciprocating motion for changing the pitch of the blade by oil supplied through the oil distribution pipe. The method according to claim 3,
The pitch feedback device,
The piston moves horizontally by a distance h by the high pressure oil supplied from the oil distribution pipe,
Simultaneously with the movement of the piston, the pin rotates the crank ring through the slider to change the pitch of the blade,
When the distance between the center of the crank ring and the center of the pin is a, the relationship between the moving distance h of the pin and the rotation angle θ of the crank ring is defined by h = a * tan θ Pitch feedback device of propeller. The method according to claim 3,
The piston is
Piston yoke;
A first space formed at one side of the piston yoke and connected to the control valve through the oil pipe inserted into the shaft; And
And a second space formed at the other side of the piston yoke corresponding to the first space and connected to the control valve through a circular space formed between the inner wall of the shaft and the oil pipe.
The pitch feedback device,
Variable pitch propeller, characterized in that for changing the pitch of the blade through the reciprocating motion of the piston in any direction opposite to the supply and withdrawal of oil to the first space and the second space of the piston. Pitch feedback device. The method according to claim 1,
The following member,
A pusher formed in a pin shape, one side of which is fixed to the oil distribution pipe, the other side of which is coupled through the lever slider and the rail slider, and which moves in the same direction as the oil distribution pipe which moves according to the horizontal movement of the pitch setting hydraulic member;
A rail having a guide groove formed therein;
A lever having a guide groove formed therein;
A rail slider inserted on the rail, through which the pusher penetrates and is coupled to a central portion, and moves along with the pusher along a guide groove formed in the rail;
A lever slider fixed to one side of the rail slider, inserted into the lever, through which the pusher penetrates and is coupled to a central portion, and moves together with the rail slider and the pusher along a guide groove formed in the lever;
A shaft coupled between the lever and the execution link; And
And an execution link for transmitting angular information due to the change of the pitch of the blades transmitted through the shaft to a hydraulic unit controller. The method according to claim 6,
The pitch feedback device,
The oil pipe in close contact with the pitch-setting hydraulic member moves the oil distribution pipe connected with the pusher horizontally by a distance h1 according to the distance h of the piston movement, and the movement of the pusher moves the rail on the rail slider. Carried out accordingly,
The lever is pushed and rotated by an angle θ1 about the axis of the shaft through the lever slider by the movement of the pusher, wherein the angle θ1 is equal to the angle θ rotated based on the distance h at which the piston is moved.
The rotated angle signal θ1 is transmitted to the hydraulic unit controller through the execution link,
When the distance between the center of the oil distribution pipe and the center of the shaft is a1, the relationship between the moving distance h1 of the rail and the lever and the angle θ1 is defined as h1 = a1 * tanθ1. Pitch feedback device.

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