A precise hoisting device for a pumped storage power generation motor stator bar

Abstract

A kind of precision hoisting device of pumped storage power generation motor stator bar, the device includes annular track, track beam, universal wheel, stator base, electric hoist, limiting baffle;Stator base is uniformly and symmetrically provided with several along circumference, annular track is installed at the top of several stator bases, annular track is circumferential closed track, with inner and outer wing plate, the section of annular track is channel-shaped;Track beam is installed at the top of annular track, limiting baffle is welded and installed at the both ends of track beam, universal wheel is installed at the lower part of the both ends of track beam, universal wheel is arranged in the groove on annular track and walks along annular track circumference;Electric hoist is installed on track beam, and electric hoist walks along track beam radial direction.This device utilizes electric hoist walking along track beam radial direction and track beam walking on annular track axial direction, after stator bar hoisting, can reach any iron core tooth slot, solves the problem of low efficiency of stator bar hoisting by manual lifting and high probability of stator bar damage.

Description

Technical fields:

[0001] This utility model belongs to the technical field of pumped storage engineering construction, and in particular relates to the hoisting construction of stator bars of pumped storage power station generator motors, specifically a precision hoisting device for stator bars of pumped storage generator motors. Background technology:

[0002] The installation quality of the generator motors in a pumped storage power station is crucial to the success or failure of the entire pumped storage project. Stator assembly is one of the key aspects of generator motor installation, and improving the efficiency of stator bar hoisting and ensuring the safety of the stator bars are particularly important. The traditional construction method for hoisting generator motor stator bars is manual lifting, which is inefficient and prone to damaging the stator bars.

[0003] Patent application number 202120637328.X discloses a tool for hoisting generator stator bars that can move circumferentially. Its fixed crossbeam is fixed at the top to a stator shed or other building, and has a fixed shaft at the bottom. One end of the movable crossbeam is rotatably connected to the fixed shaft, and the other end is vertically mounted with a movable column. A swivel caster is installed at the bottom of the movable column, and an electric hoist is slidably mounted on the bottom of the movable crossbeam. This patent requires the generator stator shed roof as a base for fixation, and utilizes the rotating movable crossbeam and movable column to allow the swivel caster to move circumferentially on the top surface of the generator stator.

[0004] Patent application number 202122259411.0 discloses a hoisting fixture for the stator winding construction of a water pump turbine. It utilizes a central column as support, with a spherical bearing mounted on the column to rotate the support tube. An electric hoist is installed on the support tube, and a travel wheel is located on the outer shaft end of the support tube. This patent welds multiple support tubes onto the spherical bearing, making it impossible to achieve 360-degree rotation of a single crossbeam. Utility model content:

[0005] This utility model provides a precision hoisting device for the stator bars of a pumped storage generator motor, which addresses the shortcomings of existing technologies and effectively solves construction problems such as low installation efficiency and stator bar damage.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] This utility model provides a precision hoisting device for the stator bars of a pumped storage power generator. The device includes a circular track, a track beam, casters, a stator base, an electric hoist, and limit baffles. Several stator bases are evenly and symmetrically arranged around the circumference. The circular track is installed on top of several stator bases. The circular track is a closed circular track with inner and outer flanges, and the cross-section of the circular track is groove-shaped. The track beam is installed on top of the circular track. Limit baffles are welded to both ends of the track beam. Casters are installed at the lower part of both ends of the track beam and are arranged in the grooves on the circular track, moving circumferentially along the circular track. An electric hoist is installed on the track beam and moves radially along the track beam.

[0008] A fixed base plate is fixedly installed on the top of the stator frame. The fixed base plate has bolt holes and is fixed to the top of the stator frame with bolts. A ring track is installed on the fixed base plate. The fixed base plate and the ring track are welded together to form a whole. The ring track is installed on the top of the stator frame through the fixed base plate.

[0009] The track beam is equipped with track supports at both ends, and casters are installed at the bottom of both ends of the track supports.

[0010] The track support has bolt holes and is securely connected to the caster wheel 4 with bolts; the top of the track support is firmly welded to the track beam.

[0011] The track beam is provided with upper and lower flange plates and a middle partition plate. The drive wheel of the electric hoist is installed on the lower flange plate of the track beam and travels radially along the flange plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model does not require the generator stator shed roof as a base for fixation. The circular track of this utility model is installed on the top of the stator base, the track beam is installed on the top of the circular track, and universal wheels are installed at the lower ends of both ends of the track beam. The universal wheels are arranged in the grooves on the circular track. This utility model utilizes the axial movement of the track beam on the circular track and the radial movement of the electric hoist along the track beam. After the stator bar is lifted, it can reach any iron core tooth groove.

[0014] 2. This utility model adopts a circumferential rotation mechanism, which eliminates the need to move the equipment back and forth. It can move flexibly and quickly according to the installation position of the stator bars to complete the hoisting work of the stator bars, which greatly improves the hoisting efficiency of the stator bars, reduces the safety hazards of construction, and solves the problems of low efficiency and high probability of stator bar damage when hoisting stator bars manually.

[0015] 3. This utility model has a simple structure, is easy to operate, has low cost, high safety, and can be reused.

[0016] 4. The height of this utility model is basically the same as that of the stator frame, so it does not take up space and will not affect the opening and closing of the stator dustproof shed. Attached image description:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure reference numerals:

[0019] 1-Circular track, 2-Track beam, 3-Track support, 4-Wheel caster, 5-Fixed base, 6-Stator base, 7-Electric hoist, 8-Limit stop. Detailed implementation method:

[0020] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0021] See Figure 1 This utility model provides a precision hoisting device for the stator bars of a pumped-storage generator motor. The device includes a circular track 1, a track beam 2, a track support 3, casters 4, a fixed base plate 5, a stator base 6, an electric hoist 7, and a limit baffle 8. Several stator bases 6 are evenly and symmetrically arranged along their circumference, and the circular track 1 is installed on top of several stator bases 6. The fixed base plate 5, with bolt holes, is fixed to the top of the stator base 6. The circular track 1 is installed on the fixed base plate 5, and the fixed base plate 5 and the circular track 1 are welded together to form a whole. The circular track 1 is installed on top of the stator base 6 through the fixed base plate 5. The circular track 1 is a circumferentially closed track with inner and outer flanges, and its cross-section is groove-shaped. A track beam 2 is installed on top of the circular track 1. Limiting baffles 8 are welded to both ends of the track beam 2 and are securely welded to it. Universal wheels 4 are installed at the lower ends of both ends of the track beam. In this embodiment, track supports 3 are installed at the lower ends of both ends of the track beam 2, and universal wheels 4 are installed below both ends of the track supports 3. The track supports 3 have bolt holes and are securely fastened to the universal wheels 4 with bolts. The top of the track supports 3 is securely welded to the track beam 2. The universal wheels 4 are arranged in grooves on the circular track 1 and travel circumferentially along the circular track 1. An electric hoist 7 is installed on the track beam 2 and travels radially along the track beam 2. In this embodiment, the track beam 2 has upper and lower flanges and a central partition. The drive wheel of the electric hoist 7 is installed on the lower flange of the track beam 2 and travels radially along the flange.

[0022] During construction, after the electric hoist 7 lifts the stator bar, it travels along the track beam 2 to the end. The wire rope of the electric hoist 7 is pulled to make the track beam 2 move circumferentially in the groove of the circular track 1, accurately falling into the iron core tooth groove, thus achieving the purpose of precise hoisting of the stator bar.

Claims

1. A precision hoisting device for the stator bars of a pumped-storage generator motor, characterized in that: The device includes a circular track (1), a track beam (2), casters (4), a stator base (6), an electric hoist (7), and a limiting baffle (8). Several stator bases (6) are evenly and symmetrically arranged around the circumference. The circular track (1) is installed on the top of several stator bases (6). The circular track (1) is a closed circular track with inner and outer wing plates. The cross section of the circular track (1) is groove-shaped. The track beam (2) is installed on the top of the circular track (1). The limiting baffle (8) is welded and installed at both ends of the track beam (2). Casters (4) are installed at the lower part of both ends of the track beam. The casters (4) are arranged in the groove on the circular track (1) and move around the circumference of the circular track (1). An electric hoist (7) is installed on the track beam (2) and moves radially along the track beam (2).

2. The precision hoisting device for the stator bars of the pumped storage power generation motor according to claim 1, characterized in that: The top of the stator frame (6) is fixedly mounted with a fixed base plate (5). The fixed base plate (5) has bolt holes and is fixed to the top of the stator frame (6) with bolts. The annular track (1) is installed on the fixed base plate (5). The fixed base plate (5) and the annular track (1) are welded together as a whole. The annular track (1) is installed on the top of the stator frame (6) through the fixed base plate (5).

3. The precision hoisting device for the stator bars of the pumped storage power generation motor according to claim 1, characterized in that: The track beam (2) is equipped with track supports (3) at both ends and casters (4) are installed at both ends of the track supports (3).

4. The precision hoisting device for the stator bars of the pumped storage power generation motor according to claim 3, characterized in that: The track support (3) has bolt holes and is securely connected to the caster wheel (4) with bolts; the top of the track support (3) is firmly welded to the track beam (2).

5. The precision hoisting device for the stator bars of the pumped storage power generation motor according to claim 1, characterized in that: The track beam (2) is provided with upper and lower flange plates and a middle partition plate. The drive wheel of the electric hoist (7) is installed on the lower flange plate of the track beam (2) and travels radially along the flange plate.

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