Generator shaft generator cabin entering sliding installation method

Abstract

The invention discloses a method for installing a generator shaft generator in a cabin in a sliding manner, which comprises the following steps of: a, placing the shaft generator on the outer side of a slipway cabin, and lifting the shaft generator by using a lifting hook; b, four sets of sliding trolleys are connected with the bottom of a shaft; c, hoisting the shaft engine to span the cabin main body, hoisting the shaft engine into the bottom of the cabin from the cabin main engine hole, and slowly falling onto the sliding rail through the main engine hole; d, the traction column and the sliding trolley are connected through an electric hoist; e, the two electric hoists are started at the same time, and the shaft is slowly slid to the designated installation base position on the sliding rail in the ship length direction towards the stern; f, connecting the shaft generator with the cabin ceiling lifting lug by using a chain block, and vertically lifting the whole shaft generator; and g, the sliding trolley below the shaft engine is dismantled, the shaft engine is vertically located through the chain block, and hoisting sliding installation of the shaft engine is completed. According to the installation method, the cabin structure can be installed and folded in advance, the more flexible installation method is achieved, and the building cycle speed of a slipway is greatly increased.

Description

Technical Field

[0001] This invention relates to a method for sliding and installing a generator shaft into the nacelle. Background Technology

[0002] To shorten the shipbuilding cycle and accelerate the formation of the engine room, an innovative method for sliding-in installation of the generator shaft is proposed. In shipbuilding, the main engine is typically hoisted and assembled after the engine room bottom is closed but before the upper platform is closed. Furthermore, because the shaft is located near the stern, its installation phase is earlier than that of the main engine. Based on construction experience, due to factors such as the main engine manufacturer's production cycle and tight production schedules, the main engine and shaft arrive late, directly affecting the closure of the engine room's superstructure and significantly increasing the slipway cycle and production costs. This research aims to develop a method for sliding-in installation of the generator shaft to solve these existing problems, eliminating the delays in closure caused by the delayed arrival of the main engine and shaft, and shortening the shipbuilding cycle. Summary of the Invention

[0003] The purpose of this invention is to provide a method for sliding the generator shaft into the nacelle to achieve the goal of allowing for later installation of the shaft generator, ensuring that the closing of the main engine room structure is not affected.

[0004] The technical solution adopted by the present invention to achieve the above objectives is: a method for sliding and installing a generator shaft into a nacelle, comprising the following steps: a. Place the shaft generator (2) outside the engine room on the slipway. Use two sets of wire ropes and shackles to install at four lifting points on the shaft generator (2). Use the No. 1 hook (7) and No. 2 hook (8) of the 400-ton gantry crane in conjunction with the 300-ton lifting bar (9) to connect the two sets of wire ropes and shackles respectively to lift the shaft generator (2). b. Use bolts to connect the four sets of sliding carriages (1) to the bottom of the shaft (2); c. Lift the shaft generator (2) across the main body of the nacelle, and use the No. 1 hook (7) and the No. 2 hook (8) of the 400-ton gantry crane to lift the shaft generator (2) from the main engine opening in the nacelle into the bottom of the nacelle, and slowly lower the shaft generator (2) into the sliding track (6) through the main engine opening; d. Keep the No. 1 hook (7) and No. 2 hook (8) of the 400-ton gantry crane from being loosened, and use the 10-ton electric hoist (3) to connect the traction column (5) and the sliding trolley (1). e. At the same time, start two 10-ton electric hoists (3) to slowly slide the shaft (2) along the length of the ship on the sliding track (6) towards the stern. The shaft (2) is pulled by the two 10-ton electric hoists (3) to drive the four sets of sliding trolleys (1) to slide the shaft (2) to the designated installation base position. f. Use four 10-ton hand chain hoists (4) to connect the shaft generator (2) to the lifting lugs above the engine room roof, and simultaneously tighten the four 10-ton hand chain hoists (4) to vertically lift the shaft generator (2) by 500mm. g. Remove the bolts of the sliding trolley (1) under the shaft (2), remove the four sets of sliding trolleys (1), and use four 10-ton hand-operated hoists (4) to vertically lower the shaft (2) to complete the hoisting and sliding installation of the shaft (2).

[0005] In step a, the shaft (2) is vertically raised to a height of 500mm.

[0006] In step b, the four sets of sliding trolleys (1) consist of two sets on the tail side and two sets on the front side.

[0007] In step e, guide flat irons are installed on both sides of the sliding track (6) to prevent the sliding trolley (1) below the shaft (2) from deviating.

[0008] This invention discloses a method for sliding and installing a generator shaft into the nacelle. When the shaft is delayed in arrival, the nacelle structure can be installed and assembled in advance. This breaks away from the traditional construction thinking of crane installation and effectively combines cranes and pulleys to achieve a more flexible installation method, which greatly speeds up the construction cycle of the slipway. Attached Figure Description

[0009] Figure 1 This is a hoisting schematic diagram of a generator shaft sliding installation method for the nacelle according to the present invention.

[0010] Figure 2 This is a schematic diagram of the sliding track installation method for a generator shaft sliding installation method in the engine compartment according to the present invention.

[0011] Figure 3 yes Figure 2 A sectional view along the AA direction.

[0012] Figure 4 This is a schematic diagram of the sliding installation method of the generator shaft entering the nacelle according to the present invention. Figure 5 This is a schematic diagram of the sliding trolley used in the present invention, which describes a method for sliding and installing a generator shaft into a nacelle. Detailed Implementation

[0013] like Figures 1 to 5As shown, the method for sliding and installing the generator shaft into the engine room includes the following steps: a) Place the generator shaft 2 outside the engine room on the slipway. Use two sets of steel wire ropes and shackles to install at four lifting points on the generator shaft 2. Use the No. 1 hook 7 and the No. 2 hook 8 of a 400-ton gantry crane, along with a 300-ton lifting bar 9, to connect the two sets of steel wire ropes and shackles respectively, lifting the generator shaft 2 vertically to a height of 500mm; b) Use bolts to connect four sets of sliding trolleys 1 to the bottom of the generator shaft 2. The four sets of sliding trolleys 1 are two sets on the stern and two sets on the bow; c) Lift the generator shaft 2 across the main body of the engine room. Use the No. 1 hook 7 and the No. 2 hook 8 of a 400-ton gantry crane to lift the generator shaft 2 from the main engine opening into the bottom of the engine room. Slowly lower the generator shaft 2 through the main engine opening onto the sliding track 6; d) Maintain the No. 1 hook 7 and the 400-ton gantry crane... Without releasing the hook 8 of the crane, use a 10-ton electric hoist 3 to connect the traction column 5 and the sliding trolley 1; e, simultaneously start two 10-ton electric hoists 3 to slowly slide the shaft generator 2 along the length of the ship on the sliding track 6 towards the stern. The shaft generator 2 is pulled by the two 10-ton electric hoists 3, which drives the four sets of sliding trolleys 1 to slide, moving the shaft generator 2 to the designated installation base position. Guide flat irons are installed on both sides of the sliding track 6 to prevent the sliding trolleys 1 under the shaft generator 2 from deviating; f, use four 10-ton manual hoists 4 to connect the shaft generator 2 to the lifting lugs above the engine room ceiling, and simultaneously tighten the four 10-ton manual hoists 4 to vertically lift the shaft generator 2 by 500mm; g, remove the bolts of the sliding trolleys 1 under the shaft generator 2, remove the four sets of sliding trolleys 1, and use the four 10-ton manual hoists 4 to vertically lower the shaft generator 2 into position, completing the hoisting and sliding installation of the shaft generator 2.

Claims

1. A method for sliding and installing a generator shaft into a nacelle, characterized in that, Includes the following steps: a. Place the shaft generator (2) outside the engine room on the slipway. Use two sets of wire ropes and shackles to install at four lifting points on the shaft generator (2). Use the No. 1 hook (7) and No. 2 hook (8) of the 400-ton gantry crane in conjunction with the 300-ton lifting bar (9) to connect the two sets of wire ropes and shackles respectively to lift the shaft generator (2). b. Use bolts to connect the four sets of sliding carriages (1) to the bottom of the shaft (2); c. Lift the shaft generator (2) across the main body of the nacelle, and use the No. 1 hook (7) and the No. 2 hook (8) of the 400-ton gantry crane to lift the shaft generator (2) from the main engine opening in the nacelle into the bottom of the nacelle, and slowly lower the shaft generator (2) into the sliding track (6) through the main engine opening; d. Keep the No. 1 hook (7) and No. 2 hook (8) of the 400-ton gantry crane in place, and use the 10-ton electric hoist (3) to connect the traction column (5) and the sliding trolley (1). e. Simultaneously start two 10-ton electric hoists (3) and slowly slide the shaft (2) along the ship's length direction on the sliding track (6) towards the stern. The shaft (2) is pulled by the two 10-ton electric hoists (3) to drive the four sets of sliding trolleys (1) to slide the shaft (2) to the designated installation base position. f. Use four 10-ton hand chain hoists (4) to connect the shaft generator (2) to the lifting lugs above the engine room roof, and simultaneously tighten the four 10-ton hand chain hoists (4) to vertically lift the shaft generator (2) by 500mm. g. Remove the bolts of the sliding trolley (1) under the shaft (2), remove the four sets of sliding trolleys (1), and use four 10-ton hand-operated hoists (4) to vertically lower the shaft (2) to complete the hoisting and sliding installation of the shaft (2).

2. The method for sliding and installing a generator shaft into a nacelle according to claim 1, characterized in that: In step a, the shaft (2) is vertically raised to a height of 500mm.

3. The method for sliding and installing a generator shaft into a nacelle according to claim 1, characterized in that: In step b, the four sets of sliding trolleys (1) consist of two sets on the tail side and two sets on the front side.

4. The method for sliding and installing a generator shaft into a nacelle according to claim 1, characterized in that: In step e, guide flat irons are installed on both sides of the sliding track (6) to prevent the sliding trolley (1) below the shaft (2) from deviating.

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