A special device for dismounting and mounting a main bearing housing cover

Abstract

A kind of special device for disassembling and assembling main engine bearing box cover. When the original bearing box is hoisted, guide chain jack cooperation method is generally used, the bearing box is lifted first, and personnel need to climb to lift according to the curvature of cylinder shell, which is time-consuming and labor-consuming, and brings great inconvenience to maintenance work, and personnel frequent climbing operation has certain risk. The utility model discloses the following: the hanger is fixed at the bottom of the bottom frame, the two sides of the bottom frame are respectively rotatably connected with the linkage rotating plate, the upper end of the two linkage rotating plates is connected by a connecting rod, the cylinder body end of the supporting oil cylinder is rotatably connected with the bottom frame, and the push rod end is rotatably connected with the support on one of the linkage rotating plates. The utility model is used for disassembling and assembling main engine bearing box cover.

Description

Technical Field

[0001] This utility model relates to a special device for disassembling and assembling the main bearing housing cover. Background Technology

[0002] Currently, the main components of the steam turbine in large thermal power generating units are designed to be compact, with the bearing housing generally located close to the cylinder block and below the outer arc shell of the cylinder. During maintenance, it is necessary to remove the bolts on the horizontal mating surface of the bearing housing and then lift the bearing housing. Due to the restriction imposed by the cylinder shell, the bearing housing cannot be freely disassembled vertically.

[0003] In the original method of hoisting bearing housings, a chain jack was generally used. The bearing housing was first lifted, and personnel were required to climb to the height to raise it according to the curvature of the cylinder shell. After being raised, it was moved laterally to make way for the outer arc of the cylinder shell, and then it was raised and lowered vertically again. This method was time-consuming and labor-intensive, which greatly inconvenient the maintenance work, and the frequent climbing of personnel was risky. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned technical problems and provide a special device for disassembling and assembling the main bearing housing cover.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A special device for disassembling and assembling a main bearing housing cover comprises: a hanger, the bottom of which is fixed to a base frame; both sides of the base frame are rotatably connected to a linkage rotating plate; the upper ends of the two linkage rotating plates are connected by a connecting rod; the cylinder end of a support cylinder is rotatably connected to the base frame; and the push rod end is rotatably connected to a support on one of the linkage rotating plates.

[0007] The aforementioned special device for disassembling and assembling a main bearing housing cover includes a linkage rotating plate comprising two parallel V-shaped rods, which are fixed together by a rib plate, and each V-shaped rod has a hanging hole at its end.

[0008] The aforementioned special device for disassembling and assembling the main bearing housing cover has a lifting ring fixed to the top of the hanger.

[0009] The beneficial effects of this utility model are:

[0010] 1. This utility model eliminates the need for personnel to climb to heights when disassembling, repairing, and assembling bearing housings. The bearing housing cover can be lifted by the device, and the position of the lifted bearing housing can be changed by rotating the linkage plate, allowing the outer arc shell of the cylinder to be raised and lowered vertically.

[0011] 2. By setting a connecting rod and a supporting cylinder, this utility model can make the rotating plate rotate under the drive of the cylinder, so that it can move laterally after being lifted, so that it can give way to part of the outer arc shell of the cylinder, which facilitates vertical lifting and lowering. Attached Figure Description

[0012] Appendix Figure 1 This is the front view of this utility model;

[0013] Appendix Figure 2 This is a top view of the present invention;

[0014] Appendix Figure 3 It is attached Figure 1 Sectional view of section AA;

[0015] Appendix Figure 4 It is attached Figure 2 BB section sectional view;

[0016] Appendix Figure 5 This is a side view of the present invention;

[0017] Appendix Figure 6 This is a schematic diagram of the structure of this utility model in use;

[0018] Appendix Figure 7 This is a schematic diagram of the structure after the rotating plate is rotated;

[0019] In the diagram: 1. Lifting ring; 2. Hanger; 3. Connecting rod; 4. Support cylinder; 5. Linkage rotating plate; 6. Base frame; 7. Support; 8. Hanging hole; 9. Lifting point; 10. Cylinder outer arc housing; 11. Bearing box cover; 12. Rope; 51. Rib plate; 52. V-shaped rod. Detailed Implementation

[0020] Reference Figures 1-5 A special device for disassembling and assembling a main bearing housing cover comprises: a hanger 2, the bottom of which is fixed to a base frame 6, the base frame being an H-shaped frame; the hanger includes a horizontal plate at the upper end, a lifting ring 1 fixed on the horizontal plate, two vertical rods fixed below the horizontal plate, the vertical rods being welded to the horizontal plate, the bottom of the vertical rods being welded to the base frame; the two sides of the base frame are rotatably connected to a linkage rotating plate 5 respectively; the upper ends of the two linkage rotating plates are connected by a connecting rod 3; the cylinder end of a support cylinder 4 is rotatably connected to the base frame; and the push rod end is rotatably connected to a support 7 on one of the linkage rotating plates.

[0021] The linkage rotating plate includes two parallel V-shaped rods 52, which are fixed together by a rib plate 51, and each V-shaped rod has a hanging hole 8 at its end.

[0022] Working principle: Refer to Figures 6-7In use, first remove the bolts on the horizontal mating surface of the bearing housing cover 11, then tie the rope 12 to the lifting point 9 of the bearing housing cover, and tie the other end of the rope to the hanging hole of the linkage rotating plate. Then, lift the entire device with a crane and stop when it is close to the outer arc housing of the cylinder. At this time, the bearing housing cover has been lifted a certain distance. Then, start the support cylinder. The push rod end of the support cylinder is pushed out, which drives the linkage rotating plate to rotate, so that the lifted bearing housing cover can move laterally. After the support cylinder pushes out, the linkage rotating plate is in a near-vertical state. Continue to control the crane to lift the entire device. Since the linkage rotating plate is in a near-vertical state after rotation, it will not touch the outer arc housing of the cylinder if it continues to rise. The bearing housing cover is driven by the linkage rotating plate to move laterally a certain distance. At this time, it will not touch the outer arc housing of the cylinder if it continues to rise. Therefore, the entire device can be lifted and lowered vertically smoothly.

Claims

1. A special device for disassembling and assembling a main bearing housing cover, characterized in that: Its components include: a hanger, the bottom of which is fixed to a base frame, both sides of which are rotatably connected to a linkage rotating plate, the upper ends of the two linkage rotating plates being connected by a connecting rod, the cylinder end of a support cylinder being rotatably connected to the base frame, and the push rod end being rotatably connected to a support on one of the linkage rotating plates.

2. The special device for disassembling and assembling the main bearing housing cover according to claim 1, characterized in that: The linkage rotating plate includes two parallel V-shaped rods, which are fixed together by a rib plate, and each V-shaped rod has a hanging hole at its end.

3. The special device for disassembling and assembling the main bearing housing cover according to claim 2, characterized in that: The top of the hanger is fixed with a lifting ring.

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