Hoisting and fixing structure for transporting steam turbine

Abstract

The utility model relates to a hoisting fixing structure for steam turbine transportation, which comprises two groups of fixed semi-rings and an adjustable hoisting connecting structure, the two groups of fixed semi-rings are oppositely arranged, the side ends of the two groups of fixed semi-rings are fixed through fixing bolts, the outer side surfaces of the fixed semi-rings are provided with sliding grooves, and the adjustable hoisting connecting structure is arranged in the sliding grooves. The adjustable hoisting connecting structure is connected into the sliding groove, and the adjustable hoisting connecting structure can slide in the sliding groove. The fixing structure of the steam turbine is optimized, the binding mode of a traditional steam turbine is changed, the fixing structure fixed to the outer side of the steam turbine is designed, in addition, a connecting structure capable of being adjusted in a half-range mode and multi-position connecting nodes are designed, stress adjustment of the connecting nodes can be automatically balanced, and the problem of deformation of a shell of the steam turbine is solved; popularization and use are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of steam turbines, in particular to a hoisting and fixing structure for transporting steam turbines. Background Art

[0002] A steam turbine is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto the blades, causing the rotor equipped with the blade rows to rotate. At the same time, it is an energy conversion device that performs work externally. After the production and assembly of the steam turbine is completed, the steam turbine needs to be transported to the production site. In this process, most people use the method of strapping and hoisting. Although the soft contact bundling method can be used for hoisting work for a short time, the hoisting straps need to be re-equipped during transportation and even installation, which is very inconvenient. In order to improve the efficiency of hoisting and transportation, a special load-bearing frame and a transportation outer frame are also required to avoid deformation problems, which greatly increases the investment cost. In order to solve the above problems, a hoisting and fixing structure for steam turbine transportation is designed. Utility Model Content

[0003] The purpose of the utility model is to provide a hoisting and fixing structure for steam turbine transportation to solve the above technical problems. To achieve the above purpose, the utility model adopts the following technical solutions:

[0004] A lifting and fixing structure for transporting a steam turbine comprises a fixed half ring and an adjustable lifting and connecting structure. The fixed half ring is provided with two groups, the two groups of fixed half rings are arranged opposite to each other, and the side ends of the two groups of fixed half rings are fixed by fixing bolts. The outer side surface of the fixed half ring is provided with a sliding groove, the adjustable lifting and connecting structure is connected in the sliding groove, and the adjustable lifting and connecting structure can slide in the sliding groove.

[0005] Based on the above technical solution, the adjustable lifting connection structure consists of a central bearing structure, a side adjustable pulley, and an external top spring. The side adjustable pulley is connected to the two ends of the central bearing structure, and the side adjustable pulley can be adjusted by sliding laterally at the two ends of the central bearing structure. The external top spring is arranged on both outer sides of the central bearing structure, and the external top spring is arranged on the inner side of the side adjustable pulley.

[0006] On the basis of the above technical scheme, the central bearing structure is composed of a bearing main frame, a side end limit plate, and fixing screws. The side end limit plates are provided in two groups, and the two groups of side end limit plates are respectively fixed to the two ends of the bearing main frame by limiting fixing screws. The side end adjustable pulley is composed of an outer wheel and an inner bearing. The inner bearing is connected to the inner side of the outer wheel, and the inner bearing is connected to both sides of the bearing main frame, and the side end limit plate is arranged on the outer side of the inner bearing, and the side end of the inner bearing contacts with the outer end of the outer top spring.

[0007] On the basis of the above technical scheme, the main bearing frame is composed of a spline rod, a middle section block, and a lifting ring. The spline rod is arranged on both sides of the bottom end of the middle section block, and the lifting ring is arranged on the top side of the middle section block. The spline rod, the middle section block, and the lifting ring are fixed as a whole. A bearing embedding position is opened on the inner side of the outer wheel, and the bearing embedding positions of the two groups of outer wheels are arranged on the inner end side of the outer wheel in opposite directions. A spline groove is arranged on the inner side of the inner bearing, and the spline groove on the inner side of the inner bearing is connected to the spline rod, and the inner bearing can move laterally on the spline rod, and the outer side of the inner bearing is arranged in the bearing embedding position, the outer top spring is sleeved on the outer side of the spline rod, and the inner end of the outer top spring is tightly attached to the side of the middle section block, and the outer end of the outer top spring is tightly attached to the inner ring side of the inner bearing. When the inner bearing slides to the outer end of the spline rod, the side end limit plate can contact the outer end of the inner bearing.

[0008] Compared with the prior art, the utility model has the following advantages: the utility model optimizes the fixing structure of the steam turbine, changes the traditional binding method of the steam turbine, designs a fixing structure fixed on the outside of the steam turbine, and also designs a connection structure that can be adjusted by half, multiple position connection nodes and can automatically balance the force adjustment of the connection points, thereby reducing the deformation problem of the steam turbine shell and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a diagram of the overall appearance of the utility model.

[0010] Figure 2 This is a schematic diagram of the adjustable lifting connection structure of the utility model.

[0011] Figure 3 This is a schematic diagram of the disassembly of the adjustable lifting connection structure of the utility model.

[0012] Figure 4 It is a schematic diagram of the disassembly of the central bearing structure of the utility model.

[0013] Figure 5 It is a half-section schematic diagram of the side-end adjustable pulley of the utility model.

[0014] In the figure: fixed half ring 1, adjustable lifting connection structure 2, fixing bolt 3, sliding groove 4, central bearing structure 5, side adjustable pulley 6, outer top spring 7, bearing main frame 8, side end limit plate 9, fixing screw 10, outer wheel 11, inner bearing 12, spline rod 13, middle block 14, lifting ring 15, bearing insert 16, spline groove 17. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementations.

[0016] A lifting and fixing structure for steam turbine transportation comprises a fixed half ring 1 and an adjustable lifting and connecting structure 2. The fixed half ring 1 is provided with two groups, the two groups of fixed half rings 1 are arranged opposite to each other, and the side ends of the two groups of fixed half rings 1 are fixed by fixing bolts 3. The outer side surface of the fixed half ring 1 is provided with a sliding groove 4. The adjustable lifting and connecting structure 2 is connected in the sliding groove 4, and the adjustable lifting and connecting structure 2 can slide in the sliding groove 4.

[0017] The adjustable lifting connection structure 2 is composed of a central bearing structure 5, a side adjustable pulley 6, and an outer top spring 7. The side adjustable pulley 6 is connected to the two ends of the central bearing structure 5, and the side adjustable pulley 6 can be adjusted by transverse sliding at the two ends of the central bearing structure 5. The outer top spring 7 is arranged on the two outer sides of the central bearing structure 5, and the outer top spring 7 is arranged on the inner side of the side adjustable pulley 6.

[0018] The central bearing structure 5 is composed of a bearing main frame 8, a side end limit plate 9, and a fixing screw 10. The side end limit plate 9 is provided with two groups, and the two groups of side end limit plates 9 are respectively fixed to the two ends of the bearing main frame 8 by the limiting fixing screws 10. The side end adjustable pulley 6 is composed of an outer wheel 11 and an inner bearing 12. The inner bearing 12 is connected to the inner side of the outer wheel 11, and the inner bearing 12 is connected to both sides of the bearing main frame 8, and the side end limit plate 9 is arranged on the outer side of the inner bearing 12, and the side end of the inner bearing 12 contacts the outer end of the outer top spring 7.

[0019] The main bearing frame 8 is composed of a spline rod 13, a middle section block 14, and a lifting ring 15. The spline rod 13 is arranged on both sides of the bottom end of the middle section block 14, and the lifting ring 15 is arranged on the top side of the middle section block 14. The spline rod 13, the middle section block 14, and the lifting ring 15 are fixed as a whole. A bearing embedding position 16 is opened on the inner side of the outer wheel 11, and the bearing embedding positions 16 of the two groups of outer wheels 11 are arranged on the inner end side of the outer wheel 11 in opposite directions. A spline groove 17 is arranged on the inner side of the inner bearing 12. The inner spline groove 17 of the inner bearing 12 is connected to the spline rod 13, and the inner bearing 12 can move laterally on the spline rod 13. The outer side of the inner bearing 12 is arranged in the bearing embedding position 16. The outer top spring 7 is sleeved on the outer side of the spline rod 13, and the inner end of the outer top spring 7 is tightly attached to the side of the middle block 14. The outer end of the outer top spring 7 is tightly attached to the inner ring side of the inner bearing 12. When the inner bearing 12 slides to the outer end of the spline rod 13, the side end limit plate 9 can contact the outer end of the inner bearing 12.

[0020] Working principle of the utility model: The structure is simple to use. It mainly uses the fixed half ring 1 to be fixed on the outside of the turbine to fix the turbine casing, thereby avoiding the casing deformation problem caused by the single-point connection during the lifting process. In addition, the adjustable lifting connection structure 2 can realize semi-circular adjustment in the fixed half ring 1. When the force direction changes at the connection point, the position of the adjustable lifting connection structure 2 on the fixed half ring 1 changes accordingly, balancing the direction of the force point and avoiding the problem of deformation of the turbine structure caused by overload force.

[0021] In addition, the adjustable lifting connection structure 2 is a detachable and addable structure. Different numbers of adjustable lifting connection structures 2 are selected according to the number of connection points, lifting points, and fixing points. The outer wheel 11 can be directly removed from the outside of the inner bearing 12, which is convenient for replacing the worn and damaged outer wheel 11.

[0022] When the outer wheel 11 is pushed inward by an external force, the inner bearing 12 and the outer wheel 11 are pushed toward the middle section of the spline rod 13 as a whole. During the pushing process, the outer top spring 7 is squeezed and shrinks inward. After the external force is cancelled, the outer top spring 7 pushes the inner bearing 12 to the outer end of the spline rod 13 again. During the retraction and extension process, the installation and removal of the adjustable lifting connection structure 2 in the sliding groove 4 can be completed.

[0023] The outer push spring 7 that pushes outward pushes the inner bearing 12 to move to the outer end of the spline rod 13. This is because the outer end of the spline rod 13 is restricted by the side end limit plate 9, so that the inner bearing 12 cannot be separated from the spline rod 13. To maintain and replace the inner bearing 12, the side end limit plate 9 only needs to be removed.

[0024] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A hoisting and fixing structure for steam turbine transportation, characterized in that: The invention comprises a fixed half ring (1) and an adjustable lifting connection structure (2), wherein the fixed half ring (1) is provided with two groups, the two groups of fixed half rings (1) are arranged opposite to each other, and the side ends of the two groups of fixed half rings (1) are fixed by fixing bolts (3), and the outer side surface of the fixed half ring (1) is provided with a sliding groove (4), and the adjustable lifting connection structure (2) is connected in the sliding groove (4), and the adjustable lifting connection structure (2) can slide in the sliding groove (4).

2. A steam turbine transportation hoisting and fixing structure according to claim 1, characterized in that: The adjustable lifting connection structure (2) is composed of a central bearing structure (5), a side adjustable pulley (6), and an outer top spring (7); the side adjustable pulley (6) is connected to both ends of the central bearing structure (5), and the side adjustable pulley (6) can be adjusted by sliding laterally at both ends of the central bearing structure (5); the outer top spring (7) is arranged on both outer sides of the central bearing structure (5), and the outer top spring (7) is arranged on the inner side of the side adjustable pulley (6).

3. A steam turbine transportation hoisting and fixing structure according to claim 2, characterized in that: The central bearing structure (5) is composed of a bearing main frame (8), a side end limit plate (9), and a fixing screw (10). Two groups of the side end limit plates (9) are provided. The two groups of side end limit plates (9) are respectively fixed to the two ends of the bearing main frame (8) by the limit fixing screws (10). The side end adjustable pulley (6) is composed of an outer wheel (11) and an inner bearing (12). The inner bearing (12) is connected to the inner side of the outer wheel (11). The inner bearing (12) is connected to the two sides of the bearing main frame (8). The side end limit plate (9) is provided on the outer side of the inner bearing (12). The side end of the inner bearing (12) contacts the outer end of the outer top spring (7).

4. A steam turbine transportation hoisting and fixing structure according to claim 3, characterized in that: The main bearing frame (8) is composed of a spline rod (13), a middle section block (14), and a lifting ring (15); the spline rod (13) is arranged on both sides of the bottom end of the middle section block (14); the lifting ring (15) is arranged on the top side of the middle section block (14); the spline rod (13), the middle section block (14), and the lifting ring (15) are fixed as a whole; a bearing embedding position (16) is provided on the inner side of the outer wheel (11); and the bearing embedding positions (16) of the two groups of outer wheels (11) are arranged on the inner end side of the outer wheel (11) in opposite directions; and a spline groove (17) is provided on the inner side of the inner bearing (12). The inner spline groove (17) of the inner bearing (12) is connected to the spline rod (13), and the inner bearing (12) can move laterally on the spline rod (13). The outer side of the inner bearing (12) is arranged in the bearing embedding position (16). The outer top spring (7) is sleeved on the outer side of the spline rod (13), and the inner end of the outer top spring (7) is tightly attached to the side surface of the middle block (14). The outer end of the outer top spring (7) is tightly attached to the side edge of the inner ring of the inner bearing (12). When the inner bearing (12) slides to the outer end of the spline rod (13), the side end limit plate (9) can contact the outer end of the inner bearing (12).

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