Large ship propeller vertical preassembling device

Abstract

The utility model relates to the technical field of propeller auxiliary assembly, in particular to a large ship propeller vertical preassembling device. A vertical preassembling device for a propeller of a large ship comprises a support, a positioning flange, a tray mechanism and an electromagnetic hydraulic jack. A positioning flange is installed on the support, a propeller positioning hole for a propeller tail shaft to stretch into is formed in the middle of the positioning flange, the electromagnetic hydraulic jack is vertically placed, the telescopic end of the electromagnetic hydraulic jack is connected with the tray mechanism, and the tray mechanism is placed below the positioning flange. The tray mechanism comprises a guide block, a rotary tray, a ball bearing, a guide tray, a spring and a fixed tray in sequence from top to bottom. The vertical preassembling device for the propeller of the large ship not only can realize quick centering of a propeller tail shaft and a hydraulic nut, but also can realize smooth screwing of the hydraulic nut; and the phenomenon that the thread curled edge is stuck is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of propeller auxiliary assembly, in particular to a vertical pre-assembly device for large ship propellers. Background Art

[0002] The propeller is an important part of the ship's propulsion system. Hydraulic keyless connections are widely used in large propellers. The principle of this connection is to use a high-pressure oil pump to pump high-pressure oil into the propeller shaft hole and the matching conical oil groove of the propeller to generate an expansion force, and then use the high-pressure oil to pump it into the hydraulic nut to generate an axial force to press the propeller tightly against the propeller shaft. Finally, the pressure is released and the nut is tightened. The propeller is firmly connected to the propeller shaft through an interference fit.

[0003] Large ship propellers have the characteristics of heavy weight and large rotation diameter. In order to install the propellers smoothly, large ship propellers must undergo scraping and pre-installation processes before installation.

[0004] The propeller pre-installation of large ships is divided into horizontal pre-installation and vertical pre-installation. Horizontal pre-installation means that the propeller stern shaft is fixed horizontally at a height above the ground that exceeds the rotation radius of the propeller, and then the propeller is lifted by a crane, flipped so that the propeller shaft hole is concentric with the propeller stern shaft, and then the crane moves toward the propeller stern shaft so that the conical surface of the propeller shaft hole fits tightly with the conical surface of the propeller stern shaft, and then another crane is used to lift the hydraulic nut to cooperate with it to complete the pre-installation. This type of pre-installation is high-altitude operation with a high risk factor, occupies a large space, has a high crane occupancy rate, and requires more adjustment time when cooperating with the propeller shaft. Vertical pre-installation means that the propeller is placed on a balance frame, the propeller stern shaft is lifted vertically by the crane, the propeller stern shaft is fine-tuned to align the propeller stern shaft position with the propeller shaft hole, and then slowly put into the propeller shaft hole, and then the hydraulic nut is lifted and screwed upward to complete the pre-installation. Compared with horizontal preinstallation, vertical preinstallation only requires the design of a vertical preinstallation device and a crane to vertically lift the propeller stern shaft to complete the preinstallation work. However, during the vertical preinstallation process, the propeller stern shaft and the hydraulic nut are difficult to be concentric, and more adjustment time is required. When the hydraulic nut is screwed, the contact surface of the thread will generate huge friction, which is prone to thread curling and jamming. Summary of the invention

[0005] In order to overcome the above problems, the purpose of the utility model is to provide a vertical pre-installation device for large ship propellers, which can not only realize the rapid alignment of the propeller stern shaft and the hydraulic nut, but also realize smoothness during the screwing of the hydraulic nut to avoid the phenomenon of thread curling and jamming.

[0006] A vertical pre-installation device for propellers of large ships, comprising a bracket, a positioning flange, a tray mechanism and an electromagnetic hydraulic top; a positioning flange is installed on the bracket, a propeller positioning hole for the propeller stern shaft to extend into is opened in the middle of the positioning flange, the electromagnetic hydraulic top is placed vertically and the telescopic end of the electromagnetic hydraulic top is connected to the tray mechanism, and the tray mechanism is placed below the positioning flange; it is characterized in that the tray mechanism comprises a guide block, a rotating tray, a ball bearing, a guide tray, a spring and a fixed tray in sequence from top to bottom, a guide block for placing a hydraulic nut is installed on the upper surface of the rotating tray, the central axis of the guide block coincides with the central axis of the propeller positioning hole, the lower surface of the rotating tray is connected to the upper surface of the guide tray through a ball bearing, the lower surface of the guide tray is connected to the upper end of the spring, the lower end of the spring is connected to the upper surface of the fixed tray, and the lower surface of the fixed tray is connected to the telescopic end of the electromagnetic hydraulic top.

[0007] As a preferred solution, the guide block includes a neck embedded in the tray mechanism and a head formed by the upper end surface of the neck extending horizontally outward, and the outer wall diameter of the guide block head is the same as the inner wall diameter of the hydraulic nut.

[0008] As a preferred solution, a guide column is further provided between the guide tray and the fixed tray, one end of the guide column is fixed to the guide tray, and the other end of the guide column extends into the guide hole of the fixed tray and can move up and down in the fixed tray, and the spring is sleeved on the guide column.

[0009] As a preferred solution, a contour measuring ruler is further provided between the guide tray and the fixed tray, the upper end of the contour measuring ruler is fixed to the guide tray, the lower end of the contour measuring ruler extends into the measuring hole of the fixed tray and can move up and down in the fixed tray, and the contour measuring ruler is marked with scales.

[0010] As a preferred solution, the ball bearing, inner ring and steel balls, the upper surface of the guide tray is fixed to the outer ring, the lower surface of the rotating tray is fixed to the inner ring, the inner ring is inserted into the outer ring, and the steel balls are clamped between the inner ring and the outer ring.

[0011] As a preferred solution, the guide block is made of Cu3.

[0012] As a preferred solution, flange positioning holes are respectively opened on both sides of the positioning flange, a positioning column is provided at the upper end of the bracket, and the bracket and the positioning flange are connected through the positioning column and the flange positioning holes.

[0013] As a preferred solution, the middle portion of the bracket is fixed to the electromagnetic hydraulic jack by bolts.

[0014] The advantages of the utility model are:

[0015] (1) The utility model provides a large ship propeller vertical pre-installation device with a spring added to the tray mechanism. During the engagement process between the hydraulic nut and the propeller stern shaft, the spring is in a compressed state. The upward compression force of the spring provides a lifting force to the hydraulic nut, thereby reducing the friction between the hydraulic nut and the propeller stern shaft thread, thereby preventing the hydraulic nut from pulling the thread downward due to its heavy weight and causing the thread curling and jamming.

[0016] (2) The large ship propeller vertical pre-installation device of the utility model adds a guide block in the tray mechanism. During the pre-installation process, the hydraulic nut is sleeved on the guide block, and the hydraulic nut is quickly aligned with the propeller stern shaft through the guide block.

[0017] (3) The utility model of the large ship propeller vertical pre-assembly device adds a contour measuring scale in the tray mechanism, which can monitor the upward speed of the fixed tray in real time, and control the upward speed of the fixed tray to ensure the safe and smooth assembly of the hydraulic nut.

[0018] (4) The positioning flange used in the vertical pre-installation device for large ship propellers of the utility model is separated from the bracket. For different series of propellers, only the corresponding positioning flange needs to be replaced, and the applicability is strong. The device of the utility model is widely used in the pre-installation of large propeller stern shafts of large ship propellers such as the 3700TUE series and 3000TUE series. The maximum weight of the propeller reaches 45T, the maximum weight of the propeller stern shaft reaches 46T, and the maximum weight of the hydraulic nut reaches 1.6T. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a vertical pre-installation device for large ship propellers;

[0020] Figure 2 Schematic diagram of the working of the vertical pre-installation device for large ship propellers;

[0021] Figure 3 for Figure 1 A top view of the center positioning flange;

[0022] Figure 4 for Figure 1 Exploded view of the middle tray mechanism;

[0023] Figure 5 for Figure 1 The front view of the middle guide block;

[0024] Propeller stern shaft 1, propeller 2, positioning flange 3, bracket 4, hydraulic nut 5, guide block 6, neck 6.1, head 6.2, tray mechanism 7, electromagnetic hydraulic jack 8, rotating tray 9, ball bearing 10, guide tray 11, equal height measuring ruler 12, fixed tray 13, spring 14, flange positioning hole 15, propeller positioning hole 16, guide column 17, round hole 18. DETAILED DESCRIPTION

[0025] In order to better understand the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific examples.

[0026] Example

[0027] Combination Figure 1 As shown, the large ship propeller vertical pre-assembly device of this embodiment includes a bracket 4, a positioning flange 3, a tray mechanism 7 and an electromagnetic hydraulic top 8; the bracket 4 is equipped with a positioning flange 3, the electromagnetic hydraulic top 8 is placed vertically and the telescopic end of the electromagnetic hydraulic top 8 is connected to the tray mechanism 7, and the tray mechanism 7 is placed below the positioning flange 3.

[0028] Among them, a positioning flange 3 is placed on the bracket 4, combined with Figure 3 As shown, a propeller positioning hole 16 cooperating with the propeller is opened in the middle of the positioning flange 3, flange positioning holes 15 fixed to the bracket are opened on both sides of the positioning flange 3, a positioning column is provided at the upper end of the bracket 4, and the bracket 4 and the positioning flange 3 are connected through the positioning column and the flange positioning hole 15.

[0029] Combination Figure 1 As shown, a pallet mechanism 7 and an electromagnetic hydraulic top 8 are placed below the positioning flange 3. The fixed end of the electromagnetic hydraulic top 8 is fixed to the middle of the bracket 4 by bolts, and the telescopic end of the electromagnetic hydraulic top 8 is fixedly connected to the pallet mechanism 7. The electromagnetic hydraulic top 8 drives the pallet mechanism 7 to move up and down.

[0030] Combination Figure 4 As shown, the tray mechanism 7 includes a guide block 6, a rotating tray 9, a ball bearing 10, a guide tray 11, and a fixed tray 13 from top to bottom. A spring 14 and a height measuring ruler 12 are provided between the guide tray 11 and the fixed tray 13. The upper surface of the guide tray 11 is fixed to the outer ring 10.1 of the ball bearing 10, and the lower surface of the rotating tray 9 is fixed to the inner ring 10.2 of the ball bearing 10. The inner ring 10.2 is inserted into the outer ring 10.1, and the steel ball 10.3 of the ball bearing 10 is clamped between the inner ring 10.2 and the outer ring 10.1. The upper surface of the rotating tray 9 is provided with a circular hole 18 for placing the guide block 6. Figure 4 and Figure 5As shown, the guide block 6 includes a neck 6.1 extending into the circular hole and a head 6.2 formed by the upper end surface of the neck 6.1 extending horizontally outward. The neck 6.1 of the guide block 6 is cylindrical, and the outer wall diameter of the neck 6.1 is the same as the diameter of the circular hole 18 on the upper surface of the rotary tray 9. After the neck 6.1 of the guide block 6 is embedded in the circular hole 18, it is stable and does not shake. The head 6.2 of the guide block 6 is annular, and the central axis of the head 6.2 and the neck 6.1 of the guide block 6 coincides, and the outer wall diameter of the head 6.2 of the guide block 6 is the same as the inner diameter of the hydraulic nut 5, ensuring that the hydraulic nut 5 is sleeved on the head 6.2 of the guide block 6 without shaking. The outer wall diameter of the head 6.2 of the guide block 6 is larger than the outer wall diameter of the neck 6.1, ensuring that the head of the guide block 6 is placed on the rotary tray 9 to avoid falling from the circular hole 18, and the hydraulic nut 5 is quickly aligned with the propeller stern shaft 1 through the guide block 6.

[0031] Combination Figure 4 As shown, a spring 14 and a contour measuring ruler 12 are provided between the guide tray 11 and the fixed tray 13. The spring 14 is connected to the guide tray 11 and the fixed tray 13 through a guide column 17. One end of the guide column 17 is fixed to the guide tray 11, and the other end of the guide column 17 is inserted into the guide hole of the fixed tray 13 and can move up and down in the fixed tray 13. The spring 14 is sleeved on the guide column 17. During the biting process, the spring 14 is in a compressed state. The spring 14 provides a lifting force to the hydraulic nut 5 upward, thereby reducing the friction between the hydraulic nut 5 and the thread of the propeller stern shaft 1, and avoiding the thread curling jamming phenomenon caused by the hydraulic nut 5 pulling the thread downward due to its heavy weight; the upper end of the contour measuring ruler 12 is fixed to the guide tray 11, and the lower end of the contour measuring ruler 12 is inserted into the measuring hole of the fixed tray 13 and can move up and down in the fixed tray 13. The contour measuring ruler 12 is marked with scales, and the upward speed of the fixed tray 13 can be monitored in real time.

[0032] Combination Figure 1 The fixed end of the electromagnetic hydraulic jack 8 shown is fixed to the middle part of the bracket 4 by bolts, and the telescopic end of the electromagnetic hydraulic jack 8 is fixedly connected to the fixed pallet 13 of the pallet mechanism 7. The electromagnetic hydraulic jack 8 controls the telescopic end through electromagnetic signals to lift the fixed pallet 13 upward, and the fixed pallet 13 drives the rotary pallet 9 to rotate upward.

[0033] Combination Figure 2 As shown, the large ship propeller vertical pre-assembly device of this embodiment is used to pre-assemble the large ship propeller:

[0034] (1) Process the positioning flange 3 into a propeller positioning hole 16 matching the 3700TUE series propeller, and process flange positioning holes 15 on both sides of the positioning flange 3, and place the positioning flange 3 on the bracket 4 through the flange positioning holes 15;

[0035] (2) Place the propeller 2 on the positioning flange 3, and fit the propeller 2 with the propeller positioning hole 16 of the positioning flange 3;

[0036] (3) Use a crane to vertically lift the propeller stern shaft 1, fine-tune the position of the propeller stern shaft 1 to align it with the propeller positioning hole 16, and slowly put it into the propeller positioning hole 16;

[0037] (4) The electromagnetic hydraulic jack 8 is controlled by an electromagnetic signal to lift the tray mechanism 7, and the hydraulic nut 5 is placed on the guide block 6 of the tray mechanism 7;

[0038] (5) Combination Figure 4 As shown, the telescopic end of the electromagnetic hydraulic jack 8 is controlled to rise upward by electromagnetic signals, the fixed tray 13 is subjected to an upward jacking force, the spring 14 is compressed and transmitted to the guide tray 11, and the rotary tray 9 starts to rotate through the ball bearing 10 to make the hydraulic nut 5 and the propeller stern shaft 1 thread evenly engage. During the engagement process, the spring 14 is in a compressed state, and the spring 14 provides a lifting force to the hydraulic nut 5 upward, reducing the friction between the hydraulic nut 5 and the propeller stern shaft 1 thread, and avoiding the hydraulic nut 5 pulling the thread downward and damaging the thread, causing the thread curling to get stuck. In addition, during the rising process of the fixed tray 13, the upward speed of the fixed tray 13 can be monitored in real time by the iso-height measuring ruler 12, and the upward speed of the fixed tray 13 can be controlled to ensure the safe and smooth assembly of the hydraulic nut 5;

[0039] (6) After the hydraulic nut 5 is installed, the telescopic end of the electromagnetic hydraulic jack 8 is controlled to descend by an electromagnetic signal, and the tray mechanism 7 is separated from the hydraulic nut 5. The pre-installation of the propeller 2 and the propeller stern shaft 1 of the large ship propeller is completed.

Claims

1. A large ship propeller vertical pre-installation device, comprising a bracket (4), a positioning flange (3), a tray mechanism (7) and an electromagnetic hydraulic top (8); the bracket (4) is mounted with a positioning flange (3), a propeller positioning hole (16) is provided in the middle of the positioning flange (3) for the propeller stern shaft (1) to extend into, the electromagnetic hydraulic top (8) is placed vertically and the telescopic end of the electromagnetic hydraulic top (8) is connected to the tray mechanism (7), and the tray mechanism (7) is placed below the positioning flange (3); characterized in that The tray mechanism (7) comprises, from top to bottom, a guide block (6), a rotating tray (9), a ball bearing (10), a guide tray (11), a spring (14) and a fixed tray (13). The upper surface of the rotating tray (9) is provided with a guide block (6) on which a hydraulic nut (5) can be placed. The central axis of the guide block (6) coincides with the central axis of the propeller positioning hole (16). The lower surface of the rotating tray (9) is connected to the upper surface of the guide tray (11) via the ball bearing (10). The lower surface of the guide tray (11) is connected to the upper end of the spring (14). The lower end of the spring (14) is connected to the upper surface of the fixed tray (13). The lower surface of the fixed tray (13) is connected to the telescopic end of the electromagnetic hydraulic jack (8).

2. The large ship propeller vertical pre-assembly device according to claim 1 is characterized in that: The guide block (6) comprises a neck (6.1) embedded in the tray mechanism (7) and a head (6.2) formed by the upper end surface of the neck (6.1) extending horizontally outwards, and the outer wall diameter of the head (6.2) of the guide block (6) is the same as the inner wall diameter of the hydraulic nut (5).

3. The large ship propeller vertical pre-assembly device according to claim 1 is characterized in that: A guide column (17) is also provided between the guide tray (11) and the fixed tray (13); one end of the guide column is fixed to the guide tray (11); the other end of the guide column (17) extends into a guide hole of the fixed tray (13) and can move up and down in the fixed tray (13); the spring (14) is sleeved on the guide column (17).

4. The large ship propeller vertical pre-assembly device according to claim 1 is characterized in that: A height measuring ruler (12) is also provided between the guide tray (11) and the fixed tray (13); the upper end of the height measuring ruler (12) is fixed to the guide tray (11); the lower end of the height measuring ruler (12) extends into a measuring hole of the fixed tray (13) and can move up and down in the fixed tray (13); and the height measuring ruler (12) is marked with scale.

5. The large ship propeller vertical pre-assembly device according to claim 1, characterized in that: The ball bearing (10) comprises an outer ring (10.1), an inner ring (10.2) and steel balls (10.3); the upper surface of the guide tray (11) is fixed to the outer ring (10.1); the lower surface of the rotary tray (9) is fixed to the inner ring (10.2); the inner ring (10.2) is inserted into the outer ring (10.1); and the steel balls (10.3) are clamped between the inner ring (10.2) and the outer ring (10.1).

6. The large ship propeller vertical pre-assembly device according to claim 1 or 2, characterized in that: The material of the guide block (6) is Cu3.

7. The large ship propeller vertical pre-assembly device according to claim 1, characterized in that: Flange positioning holes (15) are respectively provided on both sides of the positioning flange (3), a positioning column is provided at the upper end of the bracket (4), and the bracket (4) and the positioning flange (3) are connected via the positioning column and the flange positioning hole (15).

8. The large ship propeller vertical pre-assembly device according to claim 1, characterized in that: The middle part of the bracket (4) is fixed to the electromagnetic hydraulic jack (8) by means of bolts.

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