Maintenance tool for fan motor of transformer cooler

Abstract

The utility model belongs to the technical field of overhauling tools, and particularly discloses a transformer cooler fan motor overhauling tool which comprises an I-shaped steel support, a hydraulic puller, a puller support, an auxiliary pulling block, a shaft head nut, a motor body and an air bellow body. The auxiliary pulling block and the shaft head nut are both arranged on a driving shaft of the motor body, the I-shaped steel support is arranged at the end of the air bellow body, the puller support is arranged on the side, away from the air bellow body, of the I-shaped steel support, the hydraulic puller is arranged on the I-shaped steel support, supporting legs are symmetrically arranged on the hydraulic puller, and the supporting legs are clamped on the auxiliary pulling block; after the I-shaped steel support and the hydraulic puller are fixed, the rotor of the motor is pulled out of a nail through the hydraulic puller, when the rotor is pulled out to 1 / 3, the rotor is held by hand, lifted upwards and kept in the middle of a stator chamber, the hydraulic puller continues to be operated, and the rotor is thoroughly taken out of the stator under the cooperation of the special tool and the hand.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tools, in particular to a transformer cooler fan motor maintenance tool. Background Art

[0002] A submersible oil pump is installed on the connecting pipe between the main shell of the oil tank and the radiator (cooler) with a fan. When the oil pump is running, the oil in the oil tank is forced to be sucked into the radiator from the top and then enter the oil tank from the bottom of the transformer to realize forced oil circulation. The oil pump is installed at the bottom of the cooler, and a flow indicator is installed on the pipeline near the oil pump to monitor the operation of the oil pump. The oil pump and the oil-immersed motor are integrally manufactured in a fully enclosed metal shell, so the oil will not leak from the shaft and other parts.

[0003] The transformer cooling system should automatically or manually start or cut off the corresponding number of cooler fans according to the load conditions. Different numbers of cooler fans should be started at different ambient temperatures. However, when a fan cannot be put into use in time due to a fault, the temperature of the transformer body will continue to rise, causing abnormal temperature rise, which will cause the protection action device to trip, and in severe cases, the transformer winding will be burned. The safe and stable operation of the cooling fan motor is directly related to the safety of the transformer. Therefore, high-quality regular inspection and timely elimination of faults of the cooler fan motor are the key to ensure the reliable operation of the transformer cooling system.

[0004] When substation maintenance personnel inspect or replace the motor bearings of the transformer cooler fan motor, they usually need to remove the cooler fan motor from the heat sink. Since the cooler fan motor uses an explosion-proof motor, it weighs more than 15kg and is installed at a high position, requiring the use of a ladder for operation and a small working space. Therefore, it requires a large number of workers to disassemble and assemble the cooler fan motor, which is highly dangerous and has low work efficiency. If the personnel do not cooperate well or are not familiar with the working environment, accidents such as falling from a height or being hit by objects are likely to occur, and personal injuries such as sprains and crushing may easily occur to maintenance personnel during the disassembly, assembly and transportation of the cooling fan motor. Utility Model Content

[0005] The utility model aims to provide a transformer cooler fan motor maintenance tool to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a transformer cooler fan motor maintenance tool, comprising an I-beam bracket, a hydraulic puller, a puller bracket, an auxiliary pull block, a shaft head nut, a motor body, and a bellows body, wherein the motor body is installed inside the bellows body, the auxiliary pull block and the shaft head nut are both arranged on the drive shaft of the motor body, the auxiliary pull block is fixed to the drive shaft of the motor body through the shaft head nut, the I-beam bracket is arranged at the end of the bellows body, the puller bracket is arranged on the side of the I-beam bracket away from the bellows body, the hydraulic puller is arranged on the I-beam bracket, and the hydraulic puller is symmetrically provided with support legs, which are clamped on the auxiliary pull block; after the I-beam bracket and the hydraulic puller are fixed, the rotor of the motor is pulled out from the nail by the hydraulic puller, and when the rotor is pulled out to 1 / 3, the rotor is held by hand to lift the rotor upward and keep it in the middle of the stator chamber, and the hydraulic puller is continued to be operated to completely remove the rotor from the stator with the cooperation of special tools and hands.

[0007] Preferably, an upper hook is fixed above the I-beam support, and the upper hook is used to hang the I-beam support on the bellows body of the cooler.

[0008] Preferably, a lower bolt hole is provided near the bottom of the I-beam support, and the lower bolt hole is used to cooperate with bolts to fix the I-beam support.

[0009] Preferably, a middle top opening is opened in the middle of the I-beam support, and the puller head of the hydraulic puller is placed in the middle top opening.

[0010] Preferably, the hydraulic puller is fixed to the puller bracket by a strap to facilitate removal, and other detachable fixing methods may also be used.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model uses an I-beam bracket in conjunction with a hydraulic horse to easily pull out the rotor. Without removing the power supply and motor feet, the transformer cooler fan and its motor can be conveniently disassembled and installed during maintenance, saving manpower, improving the efficiency of bearing replacement, being convenient and fast, and ensuring the personal safety of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the disassembly and assembly structure of the transformer cooler fan and its motor of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of a special disassembly and assembly tool for a transformer cooler fan of the utility model;

[0015] Figure 3 This is a structural schematic diagram of the comparison diagram before and after the bearing is replaced by the utility model transformer cooler fan motor rotor extraction tool.

[0016] In the figure: 1. I-beam bracket; 2. upper hook; 3. hydraulic puller; 4. puller bracket; 5. lower bolt hole; 6. auxiliary pull block; 7. middle top opening; 8. shaft head nut; 9. motor body; 10. bellows body. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-2The utility model provides a technical solution: a transformer cooler fan motor maintenance tool, including an I-beam bracket 1, a hydraulic puller 3, a puller bracket 4, an auxiliary pull block 6, a shaft head nut 8, a motor body 9, and a bellows body 10. The motor body 9 is installed inside the bellows body 10, the auxiliary pull block 6 and the shaft head nut 8 are both arranged on the drive shaft of the motor body 9, the auxiliary pull block 6 is fixed to the drive shaft of the motor body 9 through the shaft head nut 8, the I-beam bracket 1 is arranged at the end of the bellows body 10, and the puller bracket 4 is arranged on the side of the I-beam support 1 away from the bellows body 10, the hydraulic puller 3 is arranged on the I-beam support 1, and the hydraulic puller 3 is symmetrically provided with support legs, which are clamped on the auxiliary pull block 6; after the I-beam support 1 and the hydraulic puller 3 are fixed, the rotor of the motor body 9 is pulled out from the nail by the hydraulic puller 3, and when the rotor is pulled out to 1 / 3, the rotor is held by hand to lift the rotor upward and keep it in the middle of the stator chamber, and the hydraulic puller 3 is continued to be operated, and the rotor is completely taken out from the stator with the cooperation of special tools and hands.

[0021] Furthermore, an upper hook 2 is fixed above the I-beam support 1, and the upper hook 2 is used to hang the I-beam support 1 on the bellows body 10 of the cooler.

[0022] Furthermore, a lower bolt hole 5 is provided near the bottom of the I-beam support 1 , and the lower bolt hole 5 is used to fix the I-beam support 1 with bolts.

[0023] Furthermore, a middle top opening 7 is opened in the middle of the I-beam support 1 , and the puller head of the hydraulic puller 3 is placed in the middle top opening 7 .

[0024] Furthermore, the hydraulic puller 3 is fixed to the puller bracket 4 by a strap to facilitate removal, and other detachable fixing methods may also be used.

[0025] Working principle: When the transformer cooler fan motor needs to check the bearing, first remove the protective net, unscrew the transformer cooler fan motor shaft head nut 8 and remove the cooling fan, hang the I-beam bracket 1 on the horizontal plane of the cooler bellows with the upper hook 2 and screw in the corresponding lower bolt hole 5, remove the motor 9 end cover screws and use a water hammer and flat shovel to knock loose the motor drive end cover, install the auxiliary pull block 6 on the motor body shaft head, screw in the shaft head nut 8 after installation, place the hydraulic puller 3 on the puller bracket 4 and put the puller head into the middle top opening 7, use a strap to firmly fix the hydraulic puller 3 and the puller bracket 4, and the whole Adjust the hydraulic puller and the auxiliary pull block 6 to be placed on a horizontal plane, symmetrically clamp the auxiliary pull block 6 with the two supporting legs of the hydraulic puller, tighten the screws in the lower screw hole 5, and firmly fix the I-beam bracket 1 on the joint surface. Then operate the hydraulic puller 3 to pull the rotor of the motor 9 out of the stator. When the rotor is pulled out to 1 / 3, hold the rotor with your hand to lift it upward and keep it in the middle of the stator chamber. Continue to operate the hydraulic puller 3. With the cooperation of special tools and hands, completely take the rotor out of the stator, remove the shaft head nut 8, remove the auxiliary pull block 6, remove the end cover of the drive end of the motor 9, and finally replace the bearings at both ends of the motor.

[0026] Based on the actual situation and experience of their own work, the working group has designed a special tool for the maintenance and extraction of the rotor of the fan motor of a large transformer cooler. The use of this tool can conveniently complete the disassembly and installation of the transformer cooler fan and its motor during the maintenance period without removing the power supply and motor feet, thereby reducing the workload of the maintenance personnel to the greatest extent, improving work efficiency, shortening the maintenance time, and ensuring the personal safety of the maintenance personnel to a certain extent. The working group also conducted a statistical analysis of various indicators before and after the use of this disassembly and assembly tool, please refer to Figure 3 Comparison of the transformer cooler fan motor rotor extraction tool before and after replacing the bearing.

[0027] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer cooler fan motor maintenance tool, characterized in that: The invention comprises an I-beam support (1), a hydraulic puller (3), a puller support (4), an auxiliary pull block (6), a shaft head nut (8), a motor body (9), and a bellows body (10), wherein the motor body (9) is installed inside the bellows body (10), the auxiliary pull block (6) and the shaft head nut (8) are both arranged on the driving shaft of the motor body (9), the auxiliary pull block (6) is fixed on the driving shaft of the motor body (9) through the shaft head nut (8), the I-beam support (1) is arranged at the end of the bellows body (10), the puller support (4) is arranged on a side of the I-beam support (1) away from the bellows body (10), the hydraulic puller (3) is arranged on the I-beam support (1), and the hydraulic puller (3) is symmetrically provided with support legs, which are clamped on the auxiliary pull block (6).

2. A transformer cooler fan motor maintenance tool according to claim 1, characterized in that: An upper hook (2) is fixed above the I-beam support (1).

3. A transformer cooler fan motor maintenance tool according to claim 1, characterized in that: The I-beam support (1) is provided with a lower bolt hole (5) at a position close to the bottom.

4. A transformer cooler fan motor maintenance tool according to claim 1, characterized in that: A middle top opening (7) is provided in the middle of the I-beam support (1).

5. A transformer cooler fan motor maintenance tool according to claim 1, characterized in that: The hydraulic puller (3) is fixed to the puller bracket (4) via a binding belt.

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