Medium-frequency heating tool for wind driven generator bearing

Abstract

The utility model discloses a medium-frequency heating tool for a wind driven generator bearing. The medium-frequency heating tool comprises an insulating resin box, a base plate is placed in the stepped hole, a high-temperature-resistant insulation plate is placed in the groove, the bottom end of the supporting beam is fixed to the base, and the top end of the supporting beam penetrates through the stepped hole to be fixedly connected with the bottom face of the corresponding base plate; an inner-ring electromagnetic wire is embedded in the outer wall of the supporting beam in a coiled mode, an outer-ring electromagnetic wire is embedded in the inner wall of the insulating resin box in a coiled mode, and the inner-ring electromagnetic wire and the outer-ring electromagnetic wire are connected in series. The bearing heating device has the advantages that a bearing to be heated is placed on the high-temperature-resistant insulation board, the two ends of the electromagnetic wire are connected to the positive electrode and the negative electrode of the medium-frequency induction heater, and the medium-frequency induction heater is used for supplying alternating current to the inner-ring electromagnetic wire and the outer-ring electromagnetic wire, so that the bearing generates certain induction current to heat the bearing; the bearing heating device is simple in structure, used for being matched with a medium-frequency induction heater to heat a bearing, and convenient to install the bearing in a wind driven generator tower after a generator is overhauled.

Description

Technical Field:

[0001] The utility model relates to the technical field of maintenance equipment for wind turbines, in particular to a medium-frequency heating tooling for bearings of wind turbines. Background Art:

[0002] During the maintenance process of wind turbines, it is necessary to install the bearing on the rotor shaft. The mating requirement after the installation of the rotor shaft and the inner ring of the bearing is interference fit. Currently, a bearing heater is usually used. The bearing heater is a conventional device used for installing bearings. During use, the bearing expands thermally by heating, facilitating the sleeving of the bearing on the rotor shaft.

[0003] However, when maintaining the generator inside the wind turbine tower on-site, due to the large volume and heavy weight of the existing bearing heaters, they are inconvenient to carry and use. Hoisting the bearing heater into the wind turbine tower is time-consuming and laborious, with a high labor intensity. Additionally, the working principle of the medium-frequency induction heaters currently on the market is based on the electromagnetic induction phenomenon, and the heating is achieved by generating induced current in a metal conductor. However, if applied to bearing heating, there is currently no matching tooling. Summary of the Utility Model:

[0004] The purpose of the utility model is to provide a medium-frequency heating tooling for bearings of wind turbines that can match a medium-frequency induction heater to conveniently and effectively heat the bearings.

[0005] The utility model is implemented by the following technical solutions: A medium-frequency heating tooling for bearings of wind turbines includes a base, an insulating resin box, a support beam, an inner ring electromagnetic wire, and an outer ring electromagnetic wire; a support column is fixedly arranged in the middle of the bottom surface inside the insulating resin box, and two or more stepped holes are circumferentially and evenly arranged around the support column at the bottom of the insulating resin box. Grooves are arranged along each stepped hole around the support column on the bottom surface inside the insulating resin box; pads are placed in the stepped holes, and high-temperature resistant insulating and heat-insulating plates are placed in the grooves. The bottom end of the support beam is fixed on the base, and the top end of the support beam passes through the stepped hole and is fixedly connected to the bottom surface of the corresponding pad. A limit pin that is clamped on the bottom surface of the insulating resin box is movably penetrated through each support beam; two wire embedding grooves are arranged on the bottom surface inside the insulating resin box between the support column and the side wall of the insulating resin box, and the wire embedding grooves are located below the high-temperature resistant insulating and heat-insulating plates; the inner ring electromagnetic wire is spirally embedded on the outer wall of the support column, and the outer ring electromagnetic wire is spirally embedded on the inner wall of the insulating resin box, and the inner ring electromagnetic wire and the outer ring electromagnetic wire are connected in series.

[0006] Further, wire grooves are provided on the outer wall of the support column and the inner wall of the insulating resin box. The inner ring electromagnetic wire and the outer ring electromagnetic wire are embedded in the corresponding wire grooves, and the resin layer is filled in the wire embedding groove and the wire groove.

[0007] Further, both the insulating resin box and the support column are cylindrical, and the support column and the insulating resin box are integrally formed.

[0008] Further, a temperature sensor is provided through the side wall of the insulating resin box.

[0009] Advantages of the present utility model: Place the bearing to be heated on the high-temperature resistant insulating heat-insulating plate, connect the two ends of the electromagnetic wire to the positive and negative electrodes of the intermediate frequency induction heater, and use the intermediate frequency induction heater to apply alternating current to the inner ring electromagnetic wire and the outer ring electromagnetic wire, so that the bearing generates a certain induced current to heat the bearing; after the bearing heating is completed, pull out the limit pin, and the insulating resin box moves down to the base, while the bearing and the high-temperature resistant insulating heat-insulating plate stay on the backing plate, which is convenient for taking away the bearing for installation operation; the structure of the present utility model is simple, and it is used to match the intermediate frequency induction heater to heat the bearing, which is convenient for the bearing installation after the generator is overhauled in the wind turbine tower barrel. Description of the drawings:

[0010] Figure 1 is a schematic structural diagram of the present utility model.

[0011] Figure 2 is Figure 1 the top view of

[0012] The labels of each component in the drawings are as follows: base 1, insulating resin box 2, support beam 3, support column 4, stepped hole 5, groove 6, backing plate 7, high-temperature resistant insulating heat-insulating plate 8, limit pin 9, wire embedding groove 10, inner ring electromagnetic wire 11, outer ring electromagnetic wire 12, wire groove 13, resin layer 14, temperature sensor 15. Specific embodiments:

[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0014] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0015] As Figure 1 and Figure 2 shown, this embodiment provides a medium-frequency heating tooling for a wind turbine bearing, which includes a base 1, an insulating resin box 2, a support beam 3, an inner ring electromagnetic wire 11 and an outer ring electromagnetic wire 12; the top surface of the insulating resin box 2 is open, a support column 4 is fixed in the middle of the bottom surface inside the insulating resin box 2, both the insulating resin box 2 and the support column 4 are cylindrical, and the support column 4 and the insulating resin box 2 are integrally formed; two stepped holes 5 are circumferentially and evenly arranged around the support column 4 at the bottom of the insulating resin box 2, and a backing plate 7 is placed at the step in the stepped hole 5; a groove 6 is formed in the bottom surface inside the insulating resin box 2 around the support column 4 along each stepped hole 5, a high-temperature insulating and heat-insulating plate 8 is placed in the groove 6, and the bearing to be heated is placed on the high-temperature insulating and heat-insulating plate 8.

[0016] The bottom end of the support beam 3 is fixed on the base 1, the top end of the support beam 3 passes through the stepped hole 5 and is fixedly connected to the bottom surface of the corresponding backing plate 7, and a limit pin 9 clamped on the bottom surface of the insulating resin box 2 is movably inserted through each support beam 3; after the bearing heating is completed, the limit pin 9 is pulled out, the insulating resin box 2 moves down to the base 1, and the bearing and the high-temperature insulating and heat-insulating plate 8 remain on the backing plate 7, which is convenient for taking away the bearing.

[0017] On the bottom surface inside the insulating resin box 2 between the support column 4 and the side wall of the insulating resin box 2, two wire embedding grooves 10 are provided, and the wire embedding grooves 10 are placed below the high-temperature resistant insulating heat insulation plate 8; wire winding grooves 13 are provided on the outer wall of the support column 4 and the inner wall of the insulating resin box 2. The inner ring electromagnetic wire 11 is embedded in the wire winding groove 13 on the outer wall of the support column 4, and the outer ring electromagnetic wire 12 is embedded in the wire winding groove 13 on the inner wall of the insulating resin box 2. The number of turns of the inner ring electromagnetic wire 11 is the same as that of the outer ring electromagnetic wire 12, which is beneficial to the uniform heating of the inner ring and the outer ring of the bearing; the inner ring electromagnetic wire 11 and the outer ring electromagnetic wire 12 are connected in series, and the transition section from the outer ring electromagnetic wire 12 to the inner ring electromagnetic wire 11 and the lead-out wire of the inner ring electromagnetic wire 11 are buried in the wire embedding groove 10; the wire embedding groove 10 and the wire winding groove 13 are filled with a resin layer 14, so that the inner ring electromagnetic wire 11, the outer ring electromagnetic wire 12 and the insulating resin box 2 form an integral body; when the present utility model is in use, the two ends of the electromagnetic wire are connected to the positive and negative electrodes of the intermediate frequency induction heater, and the intermediate frequency induction heater is used to supply alternating current to the inner ring electromagnetic wire 11 and the outer ring electromagnetic wire 12, so that a certain induced current is generated in the bearing, and the bearing is heated thereby.

[0018] A temperature sensor 15 penetrates through the side wall of the insulating resin box 2, which is used to detect the temperature of the heated bearing in real time and feedback the detected signal to the controller in real time. The current frequency of the intermediate frequency induction heater is controlled by the controller until the temperature reaches the set required value, and then the intermediate frequency induction heater is turned off.

[0019] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A medium-frequency heating tooling for a wind turbine bearing, characterized in that It includes a base, an insulating resin box, a support beam, an inner ring electromagnetic wire, and an outer ring electromagnetic wire; A support column is fixed in the middle of the bottom surface inside the insulating resin box. Two or more stepped holes are circumferentially and evenly arranged around the support column at the bottom of the insulating resin box. Grooves are arranged along each stepped hole around the support column on the bottom surface inside the insulating resin box; A backing plate is placed in the stepped hole, and a high-temperature resistant insulating and heat-insulating plate is placed in the groove. The bottom end of the support beam is fixed on the base, and the top end of the support beam passes through the stepped hole and is fixedly connected to the bottom surface of the corresponding backing plate. A limit pin that is clamped on the bottom surface of the insulating resin box is movably penetrated through each support beam; Two wire embedding grooves are arranged on the bottom surface inside the insulating resin box between the support column and the side wall of the insulating resin box, and the wire embedding grooves are located below the high-temperature resistant insulating and heat-insulating plate; the inner ring electromagnetic wire is spirally embedded on the outer wall of the support column, and the outer ring electromagnetic wire is spirally embedded on the inner wall of the insulating resin box, and the inner ring electromagnetic wire is connected in series with the outer ring electromagnetic wire.

2. The medium-frequency heating tooling for a wind turbine bearing according to claim 1, wherein Wire grooves are arranged on the outer wall of the support column and the inner wall of the insulating resin box, and the inner ring electromagnetic wire and the outer ring electromagnetic wire are embedded in the corresponding wire grooves, and the wire embedding grooves and the wire grooves are filled with a resin layer.

3. The medium-frequency heating tooling for a wind turbine bearing according to claim 1 or 2, characterized in that Both the insulating resin box and the support column are cylindrical, and the support column and the insulating resin box are integrally formed.

4. The medium-frequency heating tooling for a wind turbine bearing according to claim 3, wherein A temperature sensor is penetrated through the side wall of the insulating resin box.

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