Special tool for pulling and installing generator rotor

Abstract

The utility model belongs to the technical field of equipment engineering, and particularly relates to a special tool for pulling and installing a generator rotor. The special tool comprises an upper-layer steel frame platform and a lower-layer steel frame base, wherein four symmetrically distributed hydraulic jacks are arranged between the upper-layer steel frame platform and the lower-layer steel frame base. A drawing hanging lug support is vertically arranged at the midpoint of one end of the upper-layer steel frame platform, a drawing hanging lug is vertically fixed to the upper portion of the drawing hanging lug support, and the center of the drawing hanging lug and the center of the rotor are located on the same horizontal line. The two side faces of the upper-layer steel frame platform are each fixedly provided with a pull hanging lug support, and the clockwise included angle between each pull hanging lug support and the horizontal plane ranges from 30 degrees to 45 degrees. And the other end of the pulling hanging lug bracket is vertically and fixedly provided with a pulling hanging lug, and the center of the pulling hanging lug and the center of the rotor are positioned on the same horizontal line. By utilizing the special tool, the generator rotor can be safely, reliably and quickly pulled and assembled, the maintenance quality is ensured, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of equipment engineering, specifically relating to a special tooling for extracting and installing a generator rotor. Background Technology

[0002] A generator is a device that converts mechanical energy into electrical energy. It is widely used in power generation, industry, commerce, and household electricity consumption, becoming an indispensable piece of equipment in modern power systems. Generators operate based on the principle of electromagnetic induction, generating current through the movement of a conductor in a magnetic field. The main components of a generator include a rotor and a stator. The stator is the stationary part of the generator, containing the armature windings that cut magnetic lines of force to generate an induced electromotive force. The rotor is the rotating part and the core component of the generator; its reliability directly affects the operation of the entire power generation system. The generator rotor typically has excitation windings responsible for generating a rotating magnetic field, which in turn induces current in the stator through electromagnetic induction.

[0003] Generator rotors typically operate at high speeds, especially in large generators where the rotor speed can reach thousands of revolutions per minute. Such high speeds require rotors to have excellent and precise dynamic balancing performance to prevent vibration and deformation. After long-term operation, generators may experience problems such as loosening or detachment of the balance weights, necessitating regular maintenance and inspection to ensure long-term reliable operation. In some cases, rotor removal and replacement may be required.

[0004] The installation and removal of the generator rotor is a crucial step in generator maintenance and repair, involving complex operations and requiring high technical expertise. The generator rotor's slender, long, and heavy dimensions increase the difficulty and cost of installation and maintenance. Furthermore, the rotor's slender and long characteristics result in a small gap between it and the stator. Current technology uses two cranes to assemble the rotor into and remove it from the stator, leading to large and asymmetrical gaps in the upper and lower assembly, misalignment between the rotor and stator centers, and subsequent wear and insulation damage. Moreover, misalignment between the rotor and stator results in poor rotor dynamic balance, generating significant vibration and noise, and in severe cases, damaging bearings and other components, making it difficult to ensure operational stability.

[0005] Therefore, there is an urgent need for a special tooling for rotor extraction and installation designed based on the characteristics of generator rotors. Utility Model Content

[0006] The purpose of this utility model is to provide a special tooling for the extraction and installation of generator rotors. This special tooling can be used to safely, reliably, and quickly extract and install generator rotors, ensuring maintenance quality and improving work efficiency.

[0007] The technical solution of this utility model is as follows:

[0008] A special tooling for extracting and installing generator rotors includes an upper steel frame platform and a lower steel frame base, with four symmetrically distributed hydraulic jacks between the upper steel frame platform and the lower steel frame base.

[0009] Four hydraulic jacks are welded and fixed to the lower surface of the upper steel frame platform and the upper surface of the lower steel frame base, respectively. These jacks are used to adjust the height of the upper steel frame platform, ensuring that its upper surface is flush with the upper surface of the generator foundation (a key structure supporting and securing the generator). The upper surface of the upper steel frame platform also serves as a slide for rotor installation and removal; it can be lubricated to reduce friction and facilitate rotor insertion and removal.

[0010] A retractable hanging bracket is vertically installed at the midpoint of one end of the upper steel frame platform. The retractable hanging bracket is vertically welded to the upper steel frame platform, ensuring even stress distribution, high load-bearing capacity, and maintaining parallel tension.

[0011] A pull-out hanger is vertically fixed to the upper part of the pull-out hanger bracket, used to suspend the chain hoist and pull the generator rotor. The center of the pull-out hanger is on the same horizontal line as the center of the rotor.

[0012] Mounting lugs are fixedly installed on both sides of the upper steel frame platform. The clockwise angle between these mounting lugs and the horizontal plane is 30°-45°. The clockwise angle is the angle formed by rotating to the right (clockwise direction) from the horizontal plane. Based on the size characteristics of the generator rotor (which is relatively long), designing the mounting lugs to have a clockwise angle of 30° to 45° with the horizontal plane increases the mounting distance while ensuring concentricity between the rotor and stator.

[0013] A mounting lug is vertically fixed at the other end of the mounting bracket, and the center of the mounting lug is on the same horizontal line as the center of the rotor. This ensures that the rotor and the generator shaft are at the same height.

[0014] Furthermore, the aforementioned generator rotor extraction and installation tooling has an upper steel frame platform and a lower steel frame base both made of welded I-beams.

[0015] Furthermore, the width between the two sides of the upper steel frame platform of the aforementioned generator rotor extraction and installation fixture is greater than or equal to the size of the bearing housing base. The width of the upper steel frame platform ensures that the bearing housing base supporting the rotor can slide smoothly on the upper surface of the platform.

[0016] Furthermore, the special tooling for removing and installing the generator rotor has an I-beam bracket for its pull-out lug.

[0017] Furthermore, the special tooling for extracting and installing the generator rotor uses I-beams for its mounting lug brackets.

[0018] Furthermore, the generator rotor extraction and installation fixture has a fixed support component installed between its mounting lug bracket and the upper steel frame platform. The fixed support component can reinforce and support the mounting lug bracket, and is connected by bolts.

[0019] The beneficial effects of this utility model are as follows: The special tooling for extracting and installing the generator rotor described herein can solve the problem of difficulty in aligning the rotor and stator centers. Furthermore, the process of extracting and installing the generator rotor is smooth, avoiding collisions and wear between the stator and rotor. It enables safe, reliable, and quick extraction and installation of the generator rotor, ensuring maintenance quality, improving work efficiency, effectively guaranteeing the safe and reliable operation of the generator, and ensuring production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the special tooling for extracting and installing the generator rotor according to this utility model.

[0021] Figure 2 This is a schematic diagram illustrating the use of the generator rotor extraction tool described in this utility model.

[0022] Figure 3 This is a schematic diagram illustrating the installation and use of the generator rotor extraction and assembly tooling described in this utility model.

[0023] Among them, 1 is the upper steel frame platform, 2 is the lower steel frame base, 3 is the hydraulic jack, 4 is the pull-out hanging ear bracket, 5 is the pull-out hanging ear, 6 is the mounting and pulling hanging ear bracket, 7 is the mounting and pulling hanging ear, 8 is the bearing box, 9 is the chain hoist, 10 is the rotor, 11 is the generator foundation, and 12 is the fixed support component. Detailed Implementation

[0024] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Example 1

[0026] The generator rotor extraction and installation fixture includes an upper steel frame platform 1 and a lower steel frame base 2, both made of I-beams. The width between the two sides of the upper steel frame platform 1 is greater than or equal to the size of the bearing housing 8 base.

[0027] Four symmetrically distributed hydraulic jacks 3 are installed between the upper steel frame platform 1 and the lower steel frame base 2. The four hydraulic jacks 3 are located at the four corners of the upper steel frame platform 1.

[0028] A pull-out hanging ear bracket 4 is vertically installed at the midpoint of one end of the upper steel frame platform 1. A pull-out hanging ear 5 is vertically fixed on the upper part of the pull-out hanging ear bracket 4. The center of the pull-out hanging ear 5 is on the same horizontal line as the center of the rotor 10. The pull-out hanging ear bracket 4 is made of welded I-beams.

[0029] Hanging brackets 6 are fixedly installed on both sides of the upper steel frame platform 1, with the clockwise angle α between the hanging brackets 6 and the horizontal plane being 30°. Fixed support members 12 are installed between the hanging brackets 6 and the upper steel frame platform 1.

[0030] A mounting lug 7 is vertically fixed at the other end of the mounting lug bracket 6, and the center of the mounting lug 7 is on the same horizontal line as the center of the rotor 10. The mounting lug bracket 6 is made of welded I-beams.

[0031] When pulling out the generator rotor 10, the overall height of the upper steel frame platform 1 is adjusted to be consistent with the upper end face of the generator foundation 11 using the four hydraulic jacks 3. An extended shaft is installed on the load side of the generator rotor 10 and hoisted by a crane to maintain balance. Then, the bearing housing 8 on the non-load side of the generator rotor 10 is secured with lifting slings. Using a chain hoist 9, one end is hooked to the lifting slings and the other end is suspended from the pull-out lug 5. Through the cooperation of the chain hoist 9 and the crane, the generator rotor 10 is slowly pulled out.

[0032] When installing the generator rotor 10, first install the extended shaft on the load side of the generator rotor 10 and hoist it with a crane to maintain balance. Then, use lifting slings to hold the bearing housing 8 on the non-load side of the generator rotor 10. Use two chain hoists 9, with one end hooked to the lifting sling and the other end suspended from the two installation lugs 7 respectively. With the cooperation of the two chain hoists 9 and the crane, slowly pull the generator rotor 10 in.

Claims

1. A special tooling for extracting and installing a generator rotor, characterized in that, It includes an upper steel frame platform and a lower steel frame base, with four symmetrically distributed hydraulic jacks between the upper steel frame platform and the lower steel frame base; A pull-out hanging ear bracket is vertically installed at the midpoint of one end of the upper steel frame platform. A pull-out hanging ear is vertically fixed on the upper part of the pull-out hanging ear bracket. The center of the pull-out hanging ear is on the same horizontal line as the center of the rotor. A mounting bracket is fixedly installed on each of the two sides of the upper steel frame platform. The clockwise angle between the mounting bracket and the horizontal plane is 30°-45°. A mounting ear is vertically fixed at the other end of the mounting bracket, and the center of the mounting ear is on the same horizontal line as the center of the rotor.

2. The special tooling for extracting and installing the generator rotor according to claim 1, characterized in that, Both the upper steel frame platform and the lower steel frame base are made of I-beams.

3. The special tooling for extracting and installing the generator rotor according to claim 1, characterized in that, The width between the two sides of the upper steel frame platform is greater than or equal to the size of the bearing housing base.

4. The special tooling for extracting and installing the generator rotor according to claim 1, characterized in that, The pull-out hanging ear bracket is made of I-beam steel.

5. The special tooling for extracting and installing the generator rotor according to claim 1, characterized in that, The mounting bracket is made of I-beams.

6. The special tooling for extracting and installing the generator rotor according to claim 1, characterized in that, A fixed support is installed between the mounting bracket and the upper steel frame platform.

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