Positioning device of generator rotor hoisting centering monitoring system

Abstract

The utility model discloses a generator rotor hoisting centering monitoring system positioning device which comprises a center plate, clamping arms which are oppositely arranged are arranged on the center plate, the clamping arms are symmetrical about the center plate, linkage matching is formed between the clamping arms, and a hydro-generator rotor electrode is detachably clamped between the clamping arms. The center plate located under the clamping arms is provided with a positioning mechanism, the positioning mechanism corresponds to the middle position of the bottom of the clamped hydro-generator rotor electrode, the clamping arms are symmetrical about the positioning mechanism, the symmetrical clamping arms are used for clamping a rotor, and at the moment, the center plate is just located in the middle position of the rotor. And the positioning mechanism can quickly position the middle position, thereby facilitating the installation of the sensor base and improving the installation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor hoisting alignment monitoring, in particular to a positioning device for a generator rotor hoisting alignment monitoring system. Background Art

[0002] The rotor is an important component of a hydrogenerator. During the overhaul of a hydrogenerator in a hydropower station, it is necessary to carry out the operations of lifting out and reinstalling the motor rotor. The rotors of large hydropower station hydrogenerators usually have large geometric dimensions and equipment tonnages, and their hoisting operations are highly difficult and risky. For large hydrogenerator units, the allowable clearance range between the rotor and the stator during hoisting is small, and a certain alignment accuracy needs to be ensured during hoisting. In addition, once the rotor and the stator are squeezed and collided during hoisting, serious equipment damage accidents will occur.

[0003] At present, the method for rotor positioning is as follows: distance sensors are installed on the rotor. During hoisting, the distance values measured by multiple sensors, that is, the gap distance between the stator and the rotor, are used to judge whether the rotor is aligned. The disadvantages of the existing alignment technology are as follows: it is impossible to accurately and quickly complete the positioning and installation of the rotor alignment monitoring device, and make it coplanar with the rotor central axis to provide reliable data. Summary of the Utility Model

[0004] The utility model provides a positioning device for a generator rotor hoisting alignment monitoring system, aiming to solve the problem in the existing technology that it is impossible to accurately and quickly complete the positioning and installation of the rotor alignment monitoring device, and make it coplanar with the rotor central axis to provide reliable data.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] The positioning device for a generator rotor hoisting alignment monitoring system includes a central plate. Oppositely arranged clamping arms are provided on the central plate, and the clamping arms are symmetric about the central plate. A linkage cooperation is formed between the clamping arms. The electrodes of the hydrogenerator rotor can be detachably clamped between the clamping arms. A positioning mechanism is provided on the central plate directly below the clamping arms. The positioning mechanism corresponds to the middle position at the bottom of the clamped hydrogenerator rotor electrodes, and the clamping arms are symmetric about the positioning mechanism.

[0007] Preferably, the clamping arms include a linkage mechanism and a clamping mechanism, and a linkage cooperation is formed between the linkage mechanisms of the clamping arms.

[0008] More preferably, the linkage mechanism includes a plurality of parallel swing arms. One end of the swing arm forms a rotational hinge cooperation with the central plate through a live hinge, and the other end of the swing arm forms a rotational hinge cooperation with the clamping mechanism through a live hinge. Gear teeth are provided at one end of the swing arm located on the central plate, and the center of the gear teeth is concentric and coaxial with the live hinge on the central plate.

[0009] Furthermore, the swing arms of the clamping arms on both sides are symmetrically arranged with respect to the central plate, and the gear teeth engagement between the symmetric swing arms forms a linkage cooperation.

[0010] Furthermore, there are at least two swing arms. One swing arm forms a rotational hinge cooperation with the top of the clamping mechanism through a live hinge, and the other swing arm forms a rotational hinge cooperation with the bottom of the clamping mechanism through a live hinge. The two swing arms, the central plate, and the clamping mechanism cooperate to form a parallelogram.

[0011] Specifically, the clamping mechanism includes clamping jaws. The clamping jaws are provided with limit grooves that fit the side of the rotor electrode of the hydrogenerator. The side of the clamping jaws away from the limit grooves is rotationally hinged to the swing arms through live hinges.

[0012] More specifically, a number of magnet blocks are equidistantly arranged in the limit grooves, and the clamping jaws are magnetically attracted to the side of the rotor electrode of the hydrogenerator through the magnet blocks.

[0013] Specifically, the positioning mechanism includes a positioning base. The positioning base is detachably and fixedly fitted to the middle position of the central plate through fasteners. A push rod is coaxially and movably embedded in the positioning base, and the push rod vertically penetrates the central plate. The push rod is directly below the bottom radial middle position of the rotor electrode of the hydrogenerator.

[0014] More specifically, the length of the push rod exceeds the radial horizontal distance from the outer wall of the rotor electrode of the hydrogenerator to the mounting seat of the tilt and clearance ranging sensor.

[0015] Advantages of the present utility model:

[0016] (1) This device solves the problem that the installation position of the rotor alignment monitoring device is coplanar with the rotor central axis;

[0017] (2) It can quickly and accurately position, and is suitable for the positioning and installation of various devices in similar scenarios;

[0018] (3) This device is easy and quick to use, greatly improving the construction efficiency on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the rear three-dimensional schematic diagram of the present utility model;

[0020] Figure 2 is the front three-dimensional schematic diagram of the present utility model;

[0021] Figure 3 is the operation and installation schematic diagram of the present utility model when positioning on the rotor;

[0022] In the figure: 1, central plate;

[0023] 2, linkage mechanism; 201, swing arm; 202, gear teeth;

[0024] 3. Clamping mechanism; 301. Jaw; 302. Limiting groove;

[0025] 4. Living hinge;

[0026] 5. Positioning mechanism; 501. Positioning base; 502. Thrust rod;

[0027] 6. Magnet block; 7. Rotor electrode of hydrogenerator. Specific implementation mode

[0028] As follows, the embodiments will be further described with reference to the drawings.

[0029] As Figures 1 to 3 shown, as a preferred Embodiment 1, the positioning device of the generator rotor hoisting alignment monitoring system includes a center plate 1. Oppositely arranged clamping arms are provided on the center plate 1, and the clamping arms are symmetrical about the center plate 1. A linkage fit is formed between the clamping arms. The rotor electrode 7 of the hydrogenerator is detachably clamped between the clamping arms. A positioning mechanism 5 is provided on the center plate 1 directly below the clamping arms. The positioning mechanism 5 corresponds to the middle position at the bottom of the clamped rotor electrode 7 of the hydrogenerator, and the clamping arms are symmetrical about the positioning mechanism 5.

[0030] The clamping arms include a linkage mechanism 2 and a clamping mechanism 3, and a linkage fit is formed between the linkage mechanisms 2 of the clamping arms.

[0031] Embodiment 1 provides a positioning device of a generator rotor hoisting alignment monitoring system. The device forms clamping arms through a linkage mechanism 2 and a clamping mechanism 3, which are symmetrically arranged on the center plate 1, and a linkage fit is formed between the clamping arms to make the clamping arms rotate synchronously. When the rotor electrode 7 of the hydrogenerator is clamped between the clamping arms, the positioning mechanism 5 and the center plate 1 pull down the clamping arms by gravity, so that the clamping arms on both sides of the rotor are clamped. At this time, due to symmetry and synchronous rotation, the center plate 1 is just located at the middle position of the rotor, and the positioning mechanism 5 also just corresponds to the middle position at the bottom of the clamped rotor electrode 7 of the hydrogenerator. At this time, the radial middle position at the bottom of the rotor can be quickly found through the positioning mechanism 5, which is convenient for the installation of the inclination and gap ranging sensor mounting seat.

[0032] As a preferred Embodiment 2, the linkage mechanism 2 includes a plurality of parallel swing arms 201. One end of the swing arm 201 is rotationally hinged to the central plate 1 through a live hinge 4, and the other end of the swing arm 201 is rotationally hinged to the clamping mechanism 3 through a live hinge 4. A gear tooth 202 is provided at one end of the swing arm 201 located on the central plate 1, and the gear tooth 202 is concentric and coaxial with the live hinge 4 on the central plate 1. The swing arm 201 serves as a force arm during clamping. One end forms a rotation with the central plate 1 through the live hinge 4, and the other end forms a rotation with the jaw 301 through the live hinge 4. When the central plate 1 moves downward, the jaw 301 tightens inward through the swing arm 201, thereby achieving clamping.

[0033] The swing arms 201 of the two side clamping arms are symmetrically arranged with respect to the central plate 1, and the gear teeth 202 between the symmetric swing arms 201 are engaged to form a linkage cooperation. This ensures the synchronous movement of the swing arms 201 and keeps the central plate 1 always in the central position.

[0034] As a preferred Embodiment 3, there are at least two swing arms 201. One swing arm 201 is rotationally hinged to the top of the clamping mechanism 3 through a live hinge 4, and the other swing arm 201 is rotationally hinged to the bottom of the clamping mechanism 3 through a live hinge 4. The two swing arms 201, the central plate 1, and the clamping mechanism 3 cooperate to form a parallelogram.

[0035] Preferably, the central plate 1 is rectangular and the jaw 301 is L-shaped. Only two swing arms 201 can make the jaw 301 always parallel to the central plate 1, thereby ensuring the clamping effect and the position of the central plate 1.

[0036] As a preferred Embodiment 4, the clamping mechanism 3 includes a jaw 301. A limiting groove 302 that fits with the side of the rotor electrode 7 of the hydrogenerator is provided on the jaw 301. The side of the jaw 301 away from the limiting groove 302 is rotationally hinged to the swing arm 201 through a live hinge 4. This ensures that during the downward movement of the central plate 1, the jaw 301 closes inward and clamps the rotor electrode 7 of the hydrogenerator through the limiting groove 302.

[0037] As a preferred Embodiment 5, a plurality of magnet blocks 6 are equidistantly arranged in the limiting groove 302, and the jaw 301 is magnetically attracted and matched with the side of the rotor electrode 7 of the hydrogenerator through the magnet blocks 6. This increases the clamping degree of the jaw 301 during positioning and is convenient for use.

[0038] As a preferred embodiment 6, the positioning mechanism 5 includes a positioning base 501, which is detachably and fixedly fitted to the middle position of the central plate 1 through fasteners. A push rod 502 is concentrically and coaxially movably embedded in the positioning base 501, and the push rod 502 vertically penetrates the central plate 1. The push rod 502 is directly below the middle position in the radial direction at the bottom of the rotor electrode 7 of the hydrogenerator. After clamping is completed, the central plate 1 is just located at the middle position outside the rotor electrode 7 of the hydrogenerator. Through the push rod 502, the middle line in the radial direction at the bottom of the rotor electrode 7 of the hydrogenerator can be corresponded. Thus, the end of the push rod 502 is the installation position of the tilt and clearance rangefinder sensor mount, completing rapid positioning.

[0039] As a preferred embodiment 7, the length of the push rod 502 exceeds the radial horizontal distance from the outer wall of the rotor electrode 7 of the hydrogenerator to the tilt and clearance rangefinder sensor mount, ensuring that the push rod 502 will not fall out of the positioning base 501 after positioning.

[0040] The working principle of the present utility model:

[0041] First, open the swing arm 201 of the linkage mechanism 2 and adjust the distance between the jaws 301 of the clamping mechanism 3 so that the two jaws 301 just clamp the two side walls of the rotor electrode 7 of the hydrogenerator. At this time, the axis of the push rod 501 of the positioning mechanism 5 is coplanar with the central plane of the rotor electrode 7 of the hydrogenerator, that is, the push rod 501 passes through the rotor central axis. Then, adjust the vertical position of the positioning fixture and the extension amount of the push rod 501. Finally, make the upper stop of the positioning surface of the tilt and clearance rangefinder sensor mount fit with the end face of the push rod 501, and the installation position of the tilt and clearance rangefinder sensor mount can be found, which is convenient for positioning and improves efficiency.

Claims

1. The positioning device of the generator rotor hoisting and centering monitoring system is characterized by: The invention comprises a central plate (1), the central plate (1) being provided with clamping arms arranged opposite to each other, and the clamping arms are symmetrical with respect to the central plate (1), and a linkage is formed between the clamping arms, and a hydro-generator rotor electrode (7) is detachably clamped between the clamping arms, and the central plate (1) located directly below the clamping arms is provided with a positioning mechanism (5), the positioning mechanism (5) corresponds to the bottom middle position of the clamped hydro-generator rotor electrode (7), and the clamping arms are symmetrical with respect to the positioning mechanism (5).

2. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 1 is characterized in that: The clamping arm comprises a linkage mechanism (2) and a clamping mechanism (3), and linkage cooperation is formed between the linkage mechanisms (2) of the clamping arm.

3. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 2 is characterized in that: The linkage mechanism (2) comprises a plurality of parallel swing arms (201), one end of the swing arm (201) being rotatably hinged with the center plate (1) via a live hinge (4), and the other end of the swing arm (201) being rotatably hinged with the clamping mechanism (3) via a live hinge (4), and one end of the swing arm (201) located on the center plate (1) is provided with gear teeth (202), and the gear teeth (202) and the live hinge (4) on the center plate (1) are coaxial.

4. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 3 is characterized in that: The swing arms (201) of the clamping arms on both sides are arranged symmetrically with respect to the central plate (1), and the gear teeth (202) between the symmetrical swing arms (201) mesh to form a linkage fit.

5. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 4 is characterized in that: There are at least two swing arms (201), one of which is in rotational hinged cooperation with the top of the clamping mechanism (3) through a live hinge (4), and the other swing arm (201) is in rotational hinged cooperation with the bottom of the clamping mechanism (3) through a live hinge (4), and the two swing arms (201), the center plate (1) and the clamping mechanism (3) cooperate to form a parallelogram.

6. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 5 is characterized in that: The clamping mechanism (3) comprises a clamping jaw (301), on which a limiting groove (302) is provided that fits with the side of the rotor electrode (7) of the hydro-generator, and a side of the clamping jaw (301) away from the limiting groove (302) is rotatably hingedly matched with the swing arm (201) via a living hinge (4).

7. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 6, characterized in that: A plurality of magnet blocks (6) are arranged at equal intervals in the limiting groove (302), and the clamping claw (301) is magnetically engaged with the side of the rotor electrode (7) of the hydro-generator through the magnet blocks (6).

8. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 7 is characterized in that: The positioning mechanism (5) comprises a positioning base (501), the positioning base (501) being detachably fixedly engaged with the middle position of the center plate (1) by means of fasteners, a mandrel (502) being coaxially and movably embedded in the positioning base (501), the mandrel (502) vertically penetrating the center plate (1), the mandrel (502) being located directly below the radial middle position of the bottom of the rotor electrode (7) of the hydro-generator.

9. The positioning device for the generator rotor hoisting and centering monitoring system according to claim 8, characterized in that: The length of the mandrel (502) exceeds the radial horizontal distance from the outer side wall of the hydro-generator rotor electrode (7) to the tilt and gap rangefinder sensor mounting seat.

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