Lifting device for marine steam turbine

Abstract

The invention relates to the technical field of hoisting and dismounting of steam turbines, in particular to a hoisting device for a marine steam turbine, and aims to solve the problem that hoisting equipment such as a travelling crane does not exist when a cylinder is overhauled and opened on a ship and in a limited space. The threaded guide columns are in threaded connection with the threaded guide sleeves, the ratchet wrenches are fixedly arranged outside the threaded guide sleeves in a sleeving mode, each end of the cross beam is located above one threaded guide sleeve and arranged on one threaded guide column in a sleeving mode, and the cross beam is arranged in the normal direction of the rotor axis of the marine steam turbine and used for being connected with the upper half portion of an outer cylinder of the marine steam turbine. The inner cylinder bracket is used for being connected with the upper half portion of an outer cylinder of the marine steam turbine and the upper half portion of an inner cylinder of the marine steam turbine, and the hanging bracket is connected to the middle of the cross beam and used for being connected with a rotor of the marine steam turbine. And checking, overhauling and reassembling the parts.

Description

Technical Field

[0002] The invention relates to the technical field of steam turbine hoisting and disassembly, and in particular to a lifting device for a marine steam turbine. Background Art

[0003] Generally, large-scale power machinery used on ships or in confined spaces requires regular maintenance during use, and the cylinder needs to be opened for inspection or repair. Due to the limited space on the ship, conventional disassembly conditions are not available when the cylinder is opened and disassembled. For land-based power equipment, a crane or other lifting equipment can be installed inside the factory to open the cylinder. There is no crane or other lifting equipment when opening the cylinder for inspection on ships and in confined spaces, and other methods or devices need to be considered for disassembly, inspection, reinstallation and other operations. Summary of the invention

[0004] The purpose of the patent of this invention: The invention is to solve the problem of no lifting equipment such as crane when repairing and opening the cylinder on board and in a confined space. The invention provides a lifting device for a marine steam turbine.

[0005] The object of the present invention is achieved as follows: A lifting device for a marine steam turbine comprises two cross beams, two hangers, four threaded guide posts, four threaded guide sleeves, four ratchet wrenches and a plurality of inner cylinder brackets;

[0006] The bottoms of four threaded guide pins are connected to the lower half of the outer cylinder of the marine steam turbine, the threaded guide pins are threadedly connected to the threaded guide sleeves, the ratchet wrench set is fixed to the outside of the threaded guide sleeves, each end of the crossbeam is located above a threaded guide sleeve and is sleeved on a threaded guide pin, the crossbeam is arranged normally to the rotor axis of the marine steam turbine, the crossbeam is used to connect the upper half of the outer cylinder of the marine steam turbine, the inner cylinder bracket is used to connect the upper half of the outer cylinder of the marine steam turbine and the upper half of the inner cylinder of the marine steam turbine, each hanger is connected to the middle of a crossbeam, and the hanger is used to connect the rotor of the marine steam turbine.

[0007] Furthermore, the threaded guide column is provided with a scale.

[0008] Still further, the lifting device further comprises four guide columns;

[0009] The guide post is used to pass through the positioning hole of the upper half of the outer cylinder of the marine steam turbine and then be fixed on the lower half of the outer cylinder of the marine steam turbine.

[0010] Furthermore, an outer cylinder bracket is connected to the side of the cross beam, and the outer cylinder bracket is used to be connected and fixed to the upper half of the outer cylinder of the marine steam turbine.

[0011] Furthermore, a key is arranged between the outer cylinder bracket and the upper half of the outer cylinder of the marine steam turbine.

[0012] Furthermore, the lifting device also includes four support columns installed between the upper half of the outer cylinder of the marine steam turbine and the lower half of the outer cylinder of the marine steam turbine to play a supporting role.

[0013] Beneficial effects:

[0014] The present invention can solve the problem of large-scale power machinery with limited space in marine and use environments, such as steam turbines, air compressors, reducers and other power equipment with horizontal center planes. The upper part of the inner and outer cylinders and the rotor can be lifted step by step to inspect, repair and reinstall the parts, and ensure its practical safety, compact structure and strong operability. It also has the characteristics of easy installation, simple operation and small space occupation.

[0015] This solution has a compact structure and is suitable for disassembling and assembling rotating mechanical equipment with a horizontal center dividing surface in a small and confined space. It occupies a small amount of space to complete the disassembly of the equipment housing and internal rotor and other components, which is convenient for inspection, maintenance and replacement of internal parts of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the upper parts of the inner and outer cylinders of a marine steam turbine using a lifting device of the present invention;

[0017] Figure 2 It is a schematic diagram of a marine steam turbine rotor supported by a lifting device according to the present invention;

[0018] Figure 3 The present invention Figure 2 A / B view.

[0019] In the figure: 1. the upper part of the outer cylinder of a marine steam turbine; 2. the upper part of the inner cylinder of a marine steam turbine; 3. the bracket of the outer cylinder; 4. the ratchet wrench; 5. the threaded guide sleeve; 6. the bracket of the inner cylinder; 7. the rotor of the marine steam turbine; 8. the support column; 9. the threaded guide column; 10. the lower part of the outer cylinder of the marine steam turbine; 14. the key; 18. the guide column; 19. the crossbeam; 20. the hanger. DETAILED DESCRIPTION

[0020] Specific embodiment 1: A lifting device for a marine steam turbine, which comprises two cross beams 19, two hangers 20, four threaded guide posts 9, four threaded guide sleeves 5, four ratchet wrenches 4 and a plurality of inner cylinder brackets 6;

[0021] The bottoms of four threaded guide pins 9 are connected to the lower half 10 of the outer cylinder of the marine steam turbine, the threaded guide pins 9 are threadedly connected to the threaded guide sleeve 5, the ratchet wrench 4 is fixedly mounted on the outside of the threaded guide sleeve 5, each end of the crossbeam 19 is located above a threaded guide sleeve 5 and is mounted on a threaded guide pin 9, the crossbeam 19 is arranged normally to the rotor axis of the marine steam turbine, the crossbeam 19 is used to connect the upper half 1 of the outer cylinder of the marine steam turbine, the inner cylinder bracket 6 is used to connect the upper half 1 of the outer cylinder of the marine steam turbine and the upper half 2 of the inner cylinder of the marine steam turbine, each hanger 20 is connected to the middle part of a crossbeam 19, and the hanger 20 is used to connect the rotor 7 of the marine steam turbine.

[0022] In this embodiment: the height of the threaded guide sleeve is adjusted by a ratchet wrench to determine the height of the crossbeam, the crossbeam is connected to the upper half of the outer cylinder of the marine steam turbine for lifting, after the upper half of the outer cylinder of the marine steam turbine is lifted, the inner cylinder bracket is used to connect the upper half of the outer cylinder of the marine steam turbine and the upper half of the inner cylinder of the marine steam turbine to complete the lifting of the upper half of the inner cylinder of the marine steam turbine, each hanger is connected to the middle part of a crossbeam, and the hanger is used to connect the rotor of the marine steam turbine.

[0023] Specific implementation method 2: A lifting device for a marine steam turbine, wherein the threaded guide column 9 is provided with a scale.

[0024] In this embodiment: the threaded guide pin is provided with a scale to ensure that the threaded guide pin has a consistent height after installation, and the position of the threaded guide sleeve can be observed.

[0025] Other implementations are the same as the first specific implementation.

[0026] Specific embodiment 3: A lifting device for a marine steam turbine, the lifting device further comprising four guide columns 18;

[0027] The guide post 18 is used to pass through the positioning hole of the upper half 1 of the outer cylinder of the marine steam turbine and then be fixed on the lower half 10 of the outer cylinder of the marine steam turbine.

[0028] In this embodiment, the guide post is used to pass through the positioning hole of the upper half of the outer cylinder of the marine steam turbine and then be fixed on the lower half of the outer cylinder of the marine steam turbine. The function of the guide post is to ensure that the outer cylinder moves up and down along the guide post and play a guiding role. Pass through the positioning hole of the upper half of the outer cylinder, screw into the threaded hole of the lower half of the outer cylinder and tighten.

[0029] Other implementations are the same as the first specific implementation.

[0030] Specific embodiment 4: A lifting device for a marine steam turbine, the side of the cross beam 19 is connected with an outer cylinder bracket 3, and the outer cylinder bracket 3 is used to be connected and fixed to the upper half 1 of the outer cylinder of the marine steam turbine.

[0031] In this embodiment: the side of the cross beam is connected with an outer cylinder bracket, which is used to be connected and fixed to the upper half of the outer cylinder of the marine steam turbine. The synchronous operation of the two outer cylinder brackets can ensure that the upper half of the outer cylinder of the marine steam turbine is lifted stably.

[0032] Other implementations are the same as the first specific implementation.

[0033] Specific embodiment 5: A lifting device for a marine steam turbine, a key 14 is installed between the outer cylinder bracket 3 and the upper half 1 of the outer cylinder of the marine steam turbine.

[0034] In this embodiment: a key is installed between the outer cylinder bracket and the upper half of the outer cylinder of the marine steam turbine. The key connection has the characteristics of reliable operation and convenient assembly and disassembly, and is widely used. |

[0035] Other implementations are the same as the first specific implementation.

[0036] Specific embodiment 6: A lifting device for a marine steam turbine, the lifting device also includes four support columns 8 installed between the upper half 1 of the outer cylinder of the marine steam turbine and the lower half 10 of the outer cylinder of the marine steam turbine to play a supporting role.

[0037] In this embodiment, after the upper half of the outer cylinder of the marine steam turbine is lifted, a support column is installed between it and the lower half of the outer cylinder of the marine steam turbine to facilitate later personnel to enter for maintenance.

[0038] Other implementations are the same as the first specific implementation.

[0039] Working process:

[0040] When the cylinder needs to be opened when rotating the equipment, first pass the guide column through the positioning hole of the upper half of the outer cylinder, screw it into the threaded hole of the lower half of the outer cylinder and tighten it. The function of the guide column is to ensure that the outer cylinder moves up and down along the guide column and play a guiding role. Then install and connect 4 threaded guide columns with scales to the corresponding position of the lower half of the outer cylinder of the equipment through bolts, and then put the threaded guide sleeves and the crossbeam on the threaded guide columns in sequence, and then adjust the threaded guide sleeves with 4 sets of ratchet wrenches to the height so that the outer cylinder bracket can be connected to the outer cylinder interface, and then insert the key, tighten the bolts, and synchronously rotate the 4 sets of ratchet wrenches clockwise to lift the outer cylinder, and then rotate the ratchet wrenches to the corresponding height. After the height is reached, the upper half of the inner cylinder is connected to the outer cylinder through the inner cylinder bracket, and the 4 ratchet wrenches are synchronously rotated clockwise to lift the upper half of the outer cylinder and the upper half of the inner cylinder. After reaching a certain height, install the support column between the lower half and the upper half of the outer cylinder body, and connect and fix it with bolt fasteners to support the upper half of the inner and outer cylinders.

[0041] When the rotor needs to be lifted, the rotor hanger and other related components can be fixed to the crossbeam interface, and then the lower half ring of the rotor hanger can be removed and installed on the lower half of the rotor. The four ratchet wrenches are synchronously turned counterclockwise to lower the rotor hanger to the corresponding height, and the lower half ring of the rotor hanger is connected to the upper half ring with bolts. The four ratchet wrenches are synchronously turned clockwise to lift the rotor to a corresponding height, and the internal parts of the rotating equipment can be inspected, and parts can be replaced.

Claims

1. A lifting device for a marine steam turbine, characterized in that: It comprises two cross beams (19), two hangers (20), four threaded guide pins (9), four threaded guide sleeves (5), four ratchet wrenches (4) and a plurality of inner cylinder brackets (6); The bottoms of four threaded guide pins (9) are connected to the lower half of the outer cylinder (10) of the marine steam turbine. The threaded guide pins (9) are threadedly connected to the threaded guide sleeve (5). The ratchet wrench (4) is fixedly mounted on the outside of the threaded guide sleeve (5). Each end of the crossbeam (19) is located above a threaded guide sleeve (5) and mounted on a threaded guide pin (9). The crossbeam (19) is arranged in a normal direction to the rotor axis of the marine steam turbine. The crossbeam (19) is used to connect the upper half of the outer cylinder (1) of the marine steam turbine. The inner cylinder bracket (6) is used to connect the upper half of the outer cylinder (1) of the marine steam turbine and the upper half of the inner cylinder (2) of the marine steam turbine. Each hanger (20) is connected to the middle of a crossbeam (19). The hanger (20) is used to connect the rotor (7) of the marine steam turbine.

2. A marine steam turbine lifting device according to claim 1, characterized in that: The threaded guide pin (9) is provided with a scale.

3. A marine steam turbine lifting device according to claim 1, characterized in that: The lifting device also includes four guide columns (18); The guide post (18) is used to pass through the positioning hole of the upper half (1) of the outer cylinder of the marine steam turbine and then be fixed on the lower half (10) of the outer cylinder of the marine steam turbine.

4. A marine steam turbine lifting device according to claim 1, characterized in that: The side of the cross beam (19) is connected with an outer cylinder bracket (3), and the outer cylinder bracket (3) is used to be connected and fixed with the upper half (1) of the outer cylinder of the marine steam turbine.

5. A marine steam turbine lifting device according to claim 1, characterized in that: A key (14) is arranged between an outer cylinder bracket (3) and an upper half (1) of an outer cylinder of a marine steam turbine.

6. A marine steam turbine lifting device according to claim 1, characterized in that: The lifting device also includes four support columns (8) installed between the upper half (1) of the outer cylinder of the marine steam turbine and the lower half (10) of the outer cylinder of the marine steam turbine to play a supporting role.

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