A kind of ship variable pitch propeller pitch feedback synchronism checking tool and method

Abstract

The application discloses a kind of warship adjustable pitch propeller pitch feedback synchronism checking tool, for with warship adjustable pitch propeller and oil distributor connection check pitch feedback synchronism, including drawing cover plate, drawing wire rod, first drawing nut, second drawing nut, first dial gauge and second dial gauge, drawing cover plate is installed on the oil cylinder of adjustable pitch propeller, first through-hole is formed in drawing cover plate, drawing wire rod is connected with piston by being inserted into the inside of the oil cylinder of adjustable pitch propeller, first dial gauge is installed on the oil cylinder of adjustable pitch propeller, the needle of first dial gauge is connected with piston by being inserted into the inside of the oil cylinder of adjustable pitch propeller, second dial gauge is installed on oil distributor, the needle of second dial gauge is connected with the movable end of oil distributor.This application can check the pitch feedback synchronism of warship adjustable pitch propeller in the shipbuilding stage, avoid finding problem in navigation test stage to make warship need to enter dock or go up and check to solve, the application also proposes a kind of warship adjustable pitch propeller pitch feedback synchronism checking method.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of shipbuilding, and particularly relates to a propeller pitch feedback synchronization checking tool and method for a warship. BACKGROUND

[0002] In order to adapt to the demand of large difference of propelling load in multiple working conditions of a warship, a warship propeller generally adopts a variable pitch propeller propulsion mode. The variable pitch principle of the variable pitch propeller is as follows: a hydraulic oil generated by a hydraulic system is introduced into a high pressure cavity of a propeller hub by an oil distributor, a piston is driven to rotate by the hydraulic oil, an angle of a propeller blade is adjusted to change a pitch of the propeller blade, the pitch of the propeller blade is received by a pitch transmitter arranged on the oil distributor and is converted into a feedback electric signal to input an electric control system to perform pitch feedback and control. Whether the actual pitch of the underwater propeller can be synchronously fed back to the electric control system directly affects whether the variable pitch propeller device can normally work and affects the navigation performance of the warship. A current checking method is as follows: a propeller hub piston is driven by hydraulic pressure, an oil pipe in a shaft is driven to move axially, mechanical display and electric feedback of the pitch are performed by a feedback device assembly of the oil distributor, and the mechanical display and the electric feedback of the pitch are checked to determine the pitch mechanical feedback synchronization of the variable pitch propeller. The checking method cannot check whether the oil pipe in the shaft is stuck in the shaft, which causes the pitch of the mechanical display of the oil distributor and the pitch feedback to the electric control system by the pitch transmitter to be distorted. At present, there is no suitable method to detect the pitch feedback synchronization in the warship building stage. Therefore, when a problem is found, for example, an output power deviation of the variable pitch propeller arranged in a symmetrical shaft system causes the warship to automatically turn and deviate when the warship is straight, the warship is often in a navigation test stage, and the problem can only be solved by checking in a dock or on a wharf, which is difficult and high in cost. Therefore, in order to avoid the defects in the prior art, it is necessary to improve the prior art. SUMMARY

[0003] The application aims to provide a propeller pitch feedback synchronization checking tool for a warship, which can check the pitch feedback synchronization of the warship variable pitch propeller in the warship building stage, avoid finding a problem in the navigation test stage and causing the warship to need to be checked in a dock or on a wharf, and the application further provides a propeller pitch feedback synchronization checking method for a warship.

[0004] In order to solve the above technical problems, the technical scheme adopted by the application is as follows:

[0005] The application discloses a propeller pitch feedback synchronization checking tool for a warship, which is connected with a propeller and an oil distributor of the warship respectively, and comprises a pulling cover plate, a pulling screw rod, a first pulling nut, a second pulling nut, a first dial gauge and a second dial gauge.

[0006] As a preferred scheme of the propeller pitch feedback synchronization checking tool for the warship, the pulling cover plate is provided with a second screw hole, a sleeve pad is arranged between the pulling cover plate and the oil cylinder of the propeller, and a fastening bolt is arranged on the pulling cover plate, the fastening bolt is arranged to pass through the second screw hole and the sleeve pad to fix the pulling cover plate on the oil cylinder of the propeller.

[0007] As a preferred scheme of the propeller pitch feedback synchronization checking tool for the warship, the second screw hole is provided with a plurality of second screw holes, and the positions of the plurality of second screw holes are corresponding to the positions of screw holes for fixing end covers on the oil cylinder.

[0008] As a preferred scheme of the propeller pitch feedback synchronization checking tool for the warship, the plurality of second screw holes are symmetrically arranged on the upper side and the lower side of the pulling cover plate.

[0009] As a preferred scheme of the propeller pitch feedback synchronization checking tool for the warship, the pulling screw rod has two pulling screw rods, and the two pulling screw rods are symmetrically arranged on the upper side and the lower side of the pulling cover plate.

[0010] As a preferred scheme of the propeller pitch feedback synchronization checking tool for the warship, the pulling screw rod has a full-thread rod body.

[0011] The application further provides a propeller pitch feedback synchronization checking method for a warship, which is used for checking the pitch feedback synchronization by using the propeller pitch feedback synchronization checking tool.

[0012] Step one: removing the end cover of the oil cylinder of the propeller, and removing the screw bolt for connecting the piston and the crank in the oil cylinder of the propeller;

[0013] Step two: twist the drawing wire rod into the original position of the bolt in step one, and make the drawing wire rod extend into the inside of the oil cylinder of the adjustable pitch propeller and connect with the piston;

[0014] Step three: fix the drawing cover plate with the oil cylinder of the adjustable pitch propeller;

[0015] Step four: apply lubricating grease on the threaded connection between the drawing wire rod and the first and second drawing nuts;

[0016] Step five: install the first dial gauge on the oil cylinder of the adjustable pitch propeller, and make the needle of the first dial gauge extend into the inside of the oil cylinder and connect with the piston;

[0017] Step six: remove the cover plate of the oil distributor, install the second dial gauge on the oil distributor, and make the needle of the second dial gauge connect with the movable end of the oil distributor;

[0018] Step seven: check the synchronization of the forward stroke, loosen the second drawing nut, rotate the first drawing nut counterclockwise, make the piston in the inside of the oil cylinder move in the forward stroke, check whether the readings of the first and second dial gauges are consistent, and check whether the needle of the second dial gauge jumps during the movement of the piston, if the readings of the first and second dial gauges are consistent and the needle of the second dial gauge does not jump, it indicates that the synchronization of the pitch feedback is good, if the readings of the first and second dial gauges are inconsistent or the needle of the second dial gauge jumps, it indicates that the synchronization of the pitch feedback is distorted, and needs to be repaired;

[0019] Step eight: check the synchronization of the reverse stroke, loosen the first drawing nut, rotate the second drawing nut clockwise, make the piston in the inside of the oil cylinder move in the reverse stroke, check whether the readings of the first and second dial gauges are consistent, and check whether the needle of the second dial gauge jumps during the movement of the piston, if the readings of the first and second dial gauges are consistent and the needle of the second dial gauge does not jump, it indicates that the synchronization of the pitch feedback is good, if the readings of the first and second dial gauges are inconsistent or the needle of the second dial gauge jumps, it indicates that the synchronization of the pitch feedback is distorted, and needs to be repaired.

[0020] Compared with the prior art, the implementation of the above-mentioned ship adjustable pitch propeller pitch feedback synchronization checking tool has the beneficial effects that:

[0021] The drawing cover plate of the present application can be installed at the position of the original end cover after the end cover of the oil cylinder of the adjustable pitch propeller is removed, the drawing screw rod is extended into the inside of the oil cylinder of the adjustable pitch propeller through the first through hole and connected with the piston, so that the movement direction of the piston can be adjusted by screwing the first drawing nut and the second drawing nut, thereby enabling the piston to move in the forward stroke and the reverse stroke, the pointer of the first dial gauge is extended into the inside of the oil cylinder of the adjustable pitch propeller and connected with the piston, the first dial gauge can measure the movement stroke of the piston when the piston moves, the pointer of the second dial gauge is connected with the oil pressing movable end of the oil distributor, the second dial gauge can measure the movement stroke of the oil pressing movable end of the oil distributor when the oil pressing movable end of the oil distributor moves, whether the readings of the first dial gauge and the second dial gauge are consistent and whether the pointer of the second dial gauge jumps can be observed by comparing the readings of the first dial gauge and the second dial gauge, thereby checking the pitch feedback synchronization, if the readings of the first dial gauge and the second dial gauge are consistent and the pointer of the second dial gauge does not jump, it indicates that the pitch feedback synchronization is good, if the readings of the first dial gauge and the second dial gauge are inconsistent or the pointer of the second dial gauge jumps, it indicates that the shaft oil pipe may be stuck in the shaft, thereby causing the pitch feedback synchronization to be distorted, and it needs to be disassembled and inspected. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0023] Fig. 1 is a schematic view of the ship adjustable pitch propeller pitch feedback synchronization checking tool of the present application;

[0024] Fig. 2 is a front view of the drawing cover plate of the present application.

[0025] Markings in the figure:

[0026] 100, drawing cover plate; 110, fastening bolt; 120, bushing; 130, second threaded hole; 140, first through hole; 200, drawing screw rod; 210, first drawing nut; 220, second drawing nut; 300, first dial gauge; 400, second dial gauge; 500, oil cylinder; 510, piston; 520, crank; 600, oil distributor; 700, oil pipe. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0028] In the description of the present application, it should be understood that the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In the description of the present application, one or more is understood as one or more, more than two is understood as more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] Please refer to Figs. 1-2 , now the ship pitch propeller pitch feedback synchronization checking tool provided by the embodiment of the present application will be described.

[0032] As shown in Figs. 1-2 , the ship pitch propeller pitch feedback synchronization checking tool of the present application is used to be connected with the pitch propeller and the oil distributor 600 of the ship respectively, comprising a pulling cover plate 100, a pulling screw rod 200, a first pulling nut 210, a second pulling nut 220, a first dial gauge 300 and a second dial gauge 400. The pulling cover plate 100 is installed on the oil cylinder 500 of the pitch propeller. A first through hole 140 is formed in the pulling cover plate 100. The pulling screw rod 200 penetrates through the first through hole 140 and extends into the inside of the oil cylinder 500 of the pitch propeller and is connected with the piston 510. The first pulling nut 210 is connected with the pulling screw rod 200 on the side of the pulling cover plate 100 close to the oil cylinder 500. The second pulling nut 220 is connected with the pulling screw rod 200 on the side of the pulling cover plate 100 away from the oil cylinder 500. The first dial gauge 300 is installed on the oil cylinder 500 of the pitch propeller. The needle of the first dial gauge 300 extends into the inside of the oil cylinder 500 of the pitch propeller and is connected with the piston 510. The second dial gauge 400 is installed on the oil distributor 600. The needle of the second dial gauge 400 is connected with the movable oil pressing end of the oil distributor 600.

[0033] The lead screw 200 is connected to the piston 510. By turning the first pull nut 210 and the second pull nut 220, the lead screw 200 is adjusted, thereby driving the piston 510 to move. Since the piston 510 is connected to the needle of the first dial indicator 300, the stroke of the piston 510 will be fed back to the first dial indicator 300. Moreover, the piston 510 is connected to the oil pipe 700 inside the shaft. The oil pressure of the oil pipe 700 drives the movable end of the distributor 600 to move. Since the needle of the second dial indicator 400 is connected to the oil pressure movable end of the distributor 600, the stroke of the oil pressure movable end of the distributor 600 will be fed back to the second dial indicator 400. By comparing whether the readings of the first dial indicator 300 and the second dial indicator 400 are consistent, and observing whether the pointer of the second dial indicator 400 jumps, the pitch feedback synchronization is checked.

[0034] For example, the pull-out cover plate 100 is provided with a second screw hole 130, and a sleeve 120 is provided between the pull-out cover plate 100 and the hydraulic cylinder 500 of the pitch control propeller. The pull-out cover plate 100 is provided with a fastening bolt 110, which passes through the second screw hole 130 and the sleeve 120 to fix the pull-out cover plate 100 to the hydraulic cylinder 500 of the pitch control propeller. The sleeve 120 is provided between the pull-out cover plate 100 and the hydraulic cylinder 500 of the pitch control propeller, so that the pressure of the fastening bolt 110 tightening the pull-out cover plate 100 is evenly distributed on the sleeve 120. Moreover, the sleeve 120 provides a flat fixing surface for the pull-out cover plate 100 to be installed on the hydraulic cylinder 500.

[0035] For example, a plurality of second screw holes 130 are provided, and the positions of the plurality of second screw holes 130 correspond to the positions of the screw holes on the oil cylinder 500 used for fixing the end cover. In this way, after removing the end cover on the oil cylinder 500, the pull-out cover plate 100 can be installed in the original position of the end cover, which is convenient for installation.

[0036] For example, a plurality of second screw holes 130 are symmetrically arranged on the upper and lower sides of the pull-out cover plate 100. The symmetrical arrangement of the plurality of second screw holes 130 ensures that the pull-out cover plate 100 is subjected to balanced force after the fastening bolts 110 are tightened, and will not tilt to one side.

[0037] For example, there are two pull screws 200, which are symmetrically arranged on the upper and lower sides of the pull cover plate 100. The two symmetrically arranged pull screws 200 can make the piston 510 move with balanced force, so that one side is higher than the other and thus does not affect the measurement reading of the first dial indicator 300.

[0038] Exemplary, the rod body of the drawing screw rod 200 is full thread, the drawing screw rod 200 needs to replace the bolt connecting the piston 510 and the crank 520, screw into the piston 510 and the crank 520, and needs to be screwed with the first drawing nut 210 and the second drawing nut 220, so that the rod body of the drawing screw rod 200 is full thread, which is convenient for screwing with the piston 510, the crank 520, the first drawing nut 210 and the second drawing nut 220.

[0039] The application also provides a ship controllable pitch propeller pitch feedback synchronization checking method, which checks the pitch feedback synchronization through the ship controllable pitch propeller pitch feedback synchronization checking tool, and comprises the following steps:

[0040] Step one: remove the oil cylinder 500 end cover of the controllable pitch propeller, and remove the bolt connecting the piston 510 and the crank 520 inside the oil cylinder 500 of the controllable pitch propeller;

[0041] Step two: screw the drawing screw rod 200 into the original position of the bolt in step one, so that the drawing screw rod 200 extends into the inside of the oil cylinder 500 of the controllable pitch propeller and is connected with the piston 510;

[0042] Step three: fix the drawing cover plate 100 with the oil cylinder 500 of the controllable pitch propeller;

[0043] Step four: apply lubricating grease at the threaded connection between the drawing screw rod 200 and the first drawing nut 210 and the second drawing nut 220;

[0044] Step five: install the first dial gauge 300 on the oil cylinder 500 of the controllable pitch propeller, and extend the needle of the first dial gauge 300 into the inside of the oil cylinder 500 of the controllable pitch propeller and connect with the piston 510;

[0045] Step six: remove the cover plate of the oil distributor 600, install the second dial gauge 400 on the oil distributor 600, and connect the needle of the second dial gauge 400 with the oil pressing movable end of the oil distributor 600;

[0046] Step seven: check the synchronization of the forward stroke, loosen the second pull nut 220, rotate the first pull nut 210 counterclockwise, move the piston 510 inside the oil cylinder 500 to the forward stroke, check whether the readings of the first and second dial gauges 300 and 400 are consistent, and whether the pointer of the second dial gauge 400 jumps during the movement of the piston 510. If the readings of the first and second dial gauges 300 and 400 are consistent and the pointer of the second dial gauge 400 does not jump, it means that the pitch feedback synchronization is good. If the readings of the first and second dial gauges 300 and 400 are inconsistent or the pointer of the second dial gauge 400 jumps, it means that the pitch feedback synchronization is distorted and needs to be repaired.

[0047] Step eight: check the synchronization of the reverse stroke, loosen the first pull nut 210, rotate the second pull nut 220 clockwise, move the piston 510 inside the oil cylinder 500 to the reverse stroke, check whether the readings of the first and second dial gauges 300 and 400 are consistent, and whether the pointer of the second dial gauge 400 jumps during the movement of the piston 510. If the readings of the first and second dial gauges 300 and 400 are consistent and the pointer of the second dial gauge 400 does not jump, it means that the pitch feedback synchronization is good. If the readings of the first and second dial gauges 300 and 400 are inconsistent or the pointer of the second dial gauge 400 jumps, it means that the pitch feedback synchronization is distorted and needs to be repaired.

[0048] The method checks the pitch feedback synchronization of the propeller of the ship through the pitch feedback synchronization checking tool, which can be used during the shipbuilding stage, thereby checking the pitch feedback synchronization of the propeller of the ship, avoiding discovering problems during the sailing test stage, making the ship need to be docked or checked to solve the problem, advancing the time point of discovering the problem to the shipbuilding stage, and reducing the cost of disassembly and inspection.

[0049] The implementation of the above-mentioned pitch feedback synchronization checking tool for the propeller of the ship provided by the present application has the beneficial effects compared with the prior art, which are:

[0050] The drawing cover plate 100 of the present application can be installed at the position of the original end cover after the end cover of the oil cylinder 500 of the pitch adjusting propeller is removed, and the drawing wire rod 200 is extended into the inside of the oil cylinder 500 of the pitch adjusting propeller through the first through hole 140 and connected with the piston 510, so that by rotating the first drawing nut 210 and the second drawing nut 220, the movement direction of the piston 510 can be adjusted to make the piston 510 move in the forward stroke and the reverse stroke, the pointer of the first dial gauge 300 is extended into the inside of the oil cylinder 500 of the pitch adjusting propeller and connected with the piston 510, and the first dial gauge 300 can measure the moving stroke of the piston 510 when the piston 510 moves, the pointer of the second dial gauge 400 is connected with the oil pressing movable end of the oil distributor 600, and the second dial gauge 400 can measure the moving stroke of the oil pressing movable end of the oil distributor 600 when the oil pressing movable end of the oil distributor 600 moves, by comparing the readings of the first dial gauge 300 and the second dial gauge 400, whether the pointer of the second dial gauge 400 appears the jumping phenomenon is observed, so as to check the pitch feedback synchronization, if the readings of the first dial gauge 300 and the second dial gauge 400 are consistent and the pointer of the second dial gauge 400 does not appear the jumping phenomenon, it shows that the pitch feedback synchronization is good, if the readings of the first dial gauge 300 and the second dial gauge 400 are inconsistent or the pointer of the second dial gauge 400 appears the jumping phenomenon, it shows that the shaft oil pipe 700 may be stuck in the shaft, which causes the pitch feedback synchronization distortion, and needs to be repaired.

[0051] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. A tooling for checking the synchronization of pitch feedback of a ship's controllable pitch propeller, used to connect to the controllable pitch propeller and the oil distributor of a ship, characterized in that, Includes a pull-out cover plate, a pull-out screw, a first pull-out nut, a second pull-out nut, a first dial indicator, and a second dial indicator; The drawing cover plate is installed on the hydraulic cylinder of the pitch control propeller. The drawing cover plate has a first through hole. The drawing screw passes through the first through hole and extends into the hydraulic cylinder of the pitch control propeller to connect with the piston. The first drawing nut is connected to the drawing screw on the side of the drawing cover plate near the hydraulic cylinder. The second drawing nut is connected to the drawing screw on the side of the drawing cover plate away from the hydraulic cylinder. The first dial indicator is installed on the hydraulic cylinder of the controllable pitch propeller, and the needle of the first dial indicator extends into the hydraulic cylinder of the controllable pitch propeller and is connected to the piston. The second dial indicator is mounted on the oil distributor, and the needle of the second dial indicator is connected to the oil pressure movable end of the oil distributor; The synchronization of the pitch feedback of the ship's controllable propeller is checked using the aforementioned tooling, including the following steps: Step 1: Remove the cylinder end cap of the controllable pitch propeller and remove the bolts connecting the piston and crank inside the cylinder of the controllable pitch propeller; Step 2: Screw the pulling screw back into the original position of the bolt in Step 1, so that the pulling screw extends into the cylinder of the pitch control propeller and connects with the piston; Step 3: Securely connect the pull-out cover plate to the hydraulic cylinder of the pitch control propeller; Step 4: Apply grease to the threaded connection between the pull screw and the first pull nut and the second pull nut; Step 5: Install the first dial indicator on the hydraulic cylinder of the controllable pitch propeller, and insert the needle of the first dial indicator into the hydraulic cylinder of the controllable pitch propeller and connect it with the piston. Step 6: Remove the cover plate of the oil distributor, install the second dial indicator on the oil distributor, and connect the needle of the second dial indicator to the oil pressure movable end of the oil distributor; Step 7: Perform a forward stroke synchronization check. Loosen the second pull nut and rotate the first pull nut counterclockwise to move the piston inside the cylinder in the forward stroke. Check if the readings of the first dial indicator and the second dial indicator are consistent. Check if the pointer of the second dial indicator jumps during the piston movement. If the readings of the first and second dial indicators are consistent and the pointer of the second dial indicator does not jump, it indicates that the pitch feedback synchronization is good. If the readings of the first and second dial indicators are inconsistent or the pointer of the second dial indicator jumps, it indicates that the pitch feedback synchronization is distorted and needs to be repaired. Step 8: Perform a reverse travel synchronization check. Loosen the first pull nut and rotate the second pull nut clockwise to move the piston inside the cylinder in reverse travel. Check if the readings of the first and second dial indicators are consistent. Check if the pointer of the second dial indicator jumps during the piston movement. If the readings of the first and second dial indicators are consistent and the pointer of the second dial indicator does not jump, it indicates that the pitch feedback synchronization is good. If the readings of the first and second dial indicators are inconsistent or the pointer of the second dial indicator jumps, it indicates that the pitch feedback synchronization is distorted and needs to be repaired.

2. The tooling for checking the synchronization of ship controllable pitch propeller pitch feedback according to claim 1, characterized in that, The pull-out cover plate has a second screw hole, and a sleeve is provided between the pull-out cover plate and the hydraulic cylinder of the controllable pitch propeller. The pull-out cover plate is provided with a fastening bolt, which passes through the second screw hole and the sleeve to fix the pull-out cover plate to the hydraulic cylinder of the controllable pitch propeller.

3. The tooling for checking the synchronization of ship controllable pitch propeller pitch feedback according to claim 2, characterized in that, The second screw hole is provided in a plurality of positions, and the positions of the plurality of second screw holes correspond to the positions of the screw holes on the oil cylinder used to fix the end cap.

4. The ship controllable pitch propeller pitch feedback synchronization inspection fixture according to claim 3, characterized in that, Several second screw holes are symmetrically arranged on the upper and lower sides of the pull-out cover plate.

5. The tooling for checking the synchronization of ship controllable pitch propeller pitch feedback according to claim 1, characterized in that, There are two drawing screws, which are symmetrically arranged on the upper and lower sides of the drawing cover plate.

6. The tooling for checking the synchronization of ship controllable pitch propeller pitch feedback according to claim 5, characterized in that, The pull rod has a fully threaded shaft.

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