Device for disassembling bearing inner ring

Abstract

The utility model discloses a device for disassembling a bearing inner ring, which comprises a control box, a power regulator and a thermocouple are arranged in the control box, a first lead extends from the top of the power regulator, the first lead is connected with a crawler-type heating plate, a second lead extends from the top of the thermocouple, and a support rod is arranged on one side of the control box. A clamping plate used for clamping the inner ring is installed on the supporting rod. According to the device for disassembling the bearing inner ring, the crawler-type heating plates regulated and controlled by the power regulator are arranged, the heating power output is controlled, adjustment is carried out according to the number of the crawler-type heating plates and the needed heating temperature, a main shaft is not damaged, and the bearing inner ring can be recycled; the cost is reduced, and high replacement cost caused by high temperature or destructive operation is avoided; the device can be widely applied to the field of disassembling bearing inner rings of other large-sized workpieces, such as disassembling bearing inner rings of large-sized supporting roller journals.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembling a bearing inner ring, in particular to a device for disassembling a bearing inner ring. Background Art

[0002] Disassembling the inner ring of the bearing is an important step in the maintenance process of the wind turbine main shaft. Its purpose is to remove the inner ring of the bearing from the main shaft without damaging the main shaft and other bearing components so as to carry out necessary inspection, maintenance or replacement.

[0003] The patent document with the Chinese patent announcement number CN 211805860U has an authorization announcement date of October 30, 2020. It discloses a bearing inner ring removal tool. The application includes an annular metal ring with an opening, which separates the metal ring from the opening. Two clamping handles are also provided on the side of the metal ring. The two clamping handles are symmetrically arranged on both sides of the opening. The outer side of the metal ring is also provided with multiple notches toward the center of the metal ring. The bearing inner ring removal tool of the utility model is made of aluminum. After the metal ring is heated, it is fitted onto the surface of the bearing inner ring. After waiting for a few seconds, the metal ring is tightened by the clamping handle to pull down the bearing inner ring. The whole operation process is simple and convenient, and the damage to the bearing inner ring and the rotor shaft is small. The removal tool has a reasonable structure, is easy to operate, and is efficient.

[0004] It can be seen from the above application that in the process of wind turbine main shaft maintenance, the traditional methods for disassembling the inner ring of the bearing are induction heating and gas cutting. Induction heating disassembly requires special sensors and power adjustment equipment, and high temperature will cause the surface hardness of the inner ring of the bearing to decrease, making it lose its use value. The gas cutting destructive disassembly method will damage the inner ring of the bearing and even the main shaft, causing greater losses. For this reason, a device for disassembling the inner ring of the bearing is proposed. The inner ring of the shaft is removed by a crawler heater, which is an innovative bearing disassembly technology, which is mainly used for the disassembly of the inner ring of the wind turbine main shaft bearing. This technology not only improves the disassembly efficiency, but also avoids damage to the inner ring of the bearing and the main shaft, and has significant economic benefits and application value. Utility Model Content

[0005] The purpose of the utility model is to provide a device for disassembling the inner ring of a bearing, which provides an efficient, safe and economical wind turbine main shaft bearing inner ring disassembly technology, is suitable for the wind power maintenance industry, and has important practical value and broad market prospects.

[0006] In order to achieve the above-mentioned purpose, the main technical solution adopted by the utility model is: a device for disassembling the inner ring of a bearing, comprising: a control box, in which a power regulator and a thermocouple are installed, a first wire extends from the top of the power regulator, the first wire is connected to a crawler heating plate, a second wire extends from the top of the thermocouple, a support rod is provided on one side of the control box, and a clamping plate for clamping the inner ring is installed on the support rod.

[0007] Preferably, several of the crawler-type heating plates are connected by iron wires.

[0008] Preferably, the outer side of the crawler type heating plate is wrapped with refractory fibers.

[0009] Preferably, the control box is provided with an adjustment knob for adjusting the spacing between the support rods.

[0010] Preferably, there are four support rods, and two adjusting knobs, and each adjusting knob can control two support rods.

[0011] Preferably, an anti-slip pad is adhered to the inner side of the splint.

[0012] Preferably, the power regulator is provided with an adjustment button for adjusting the power of the crawler-type heating plate, and the control box is equipped with a display screen for displaying the power regulator.

[0013] Preferably, the control box is provided with a display screen for thermocouple measurement.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Compared with the traditional disassembly methods of induction heating and flame cutting, the device for disassembling the inner ring of the bearing controls the power output of the heating by setting a crawler heating plate regulated by a power regulator, and adjusts the temperature according to the number of crawler heating plates and the required heating temperature. The main shaft is not damaged and the inner ring of the bearing can be reused. The cost is reduced and the expensive replacement cost caused by high temperature or destructive operation is avoided. It can be widely used in the field of disassembling the inner ring of bearings of other large workpieces, such as the disassembly of the inner ring of large support roller journal bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the device for disassembling the inner ring of a bearing of the present invention;

[0017] Figure 2 It is a front view schematic diagram of the device for disassembling the inner ring of a bearing of the utility model;

[0018] Figure 3 It is a side view schematic diagram of the device for removing the inner ring of a bearing according to the utility model.

[0019] In the figure: 10, control box; 11, power regulator; 111, first wire; 12, thermocouple; 121, second wire; 13, support rod; 131, clamping plate; 132, anti-skid pad; 14, adjustment knob; 20, crawler heating plate; 201, iron wire; 21, refractory fiber; 30, inner ring. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 3 , a device for disassembling the inner ring of a bearing, comprising: a control box 10, a power regulator 11 and a thermocouple 12 are installed in the control box 10, a first wire 111 extends from the top of the power regulator 11, the first wire 111 is connected to a crawler heating plate 20, a plurality of crawler heating plates 20 are connected by iron wires 201, the outer side of the crawler heating plate 20 is wrapped with refractory fibers 21, an adjustment button for adjusting the power of the crawler heating plate 20 is provided on the power regulator 11, a display screen for displaying the power regulator 11 is installed on the control box 10, a second wire 121 extends from the top of the thermocouple 12, and a display screen for measuring the thermocouple 12 is provided on the control box 10;

[0022] A support rod 13 is provided on one side of the control box 10, and a clamping plate 131 for clamping the inner ring 30 is installed on the support rod 13. An adjusting knob 14 for adjusting the spacing between the support rods 13 is provided on the control box 10. There are four support rods 13, and two adjusting knobs 14 are provided. Each adjusting knob 14 can control two support rods 13, and an anti-slip pad 132 is pasted on the inner side of the clamping plate 131.

[0023] Structural principle:

[0024] like Figure 1-Figure 3 As shown, a track-type heating plate 20 model matching the size of the bearing inner ring is selected, and a plurality of iron wires 201 are used to connect the track-type heating plates 20 to each other to ensure that the bearing inner ring 30 is completely covered. The power of the power regulator 11 is adjusted according to the amount of the track-type heating plate 20, and each track plate usually corresponds to a power of 10Kw. During the heating process, the second wire 121 connected to the thermocouple 12 is used to monitor the temperature;

[0025] During operation, firstly, remove the oil stains on the inner ring 30 of the bearing, then wrap the inner ring 30 of the bearing with the crawler heating plate 20, and connect and fix the crawler heating plate 20 with the iron wire 201, and pay attention to avoid the overlap of the redundant crawler plate, install the second wire 121 connected to the thermocouple 12 between the crawler heating plate 20 and the inner ring 30 of the bearing, and use refractory fiber 21 or refractory blanket for heat insulation protection, wrap the outside of the crawler heating plate 20 with refractory fiber 21, and tie it tightly with iron wire 201 to ensure the uniformity of heating; connect the crawler heating plate 20 with the power regulator through the first wire 111 The device 11 is connected, and it is recommended to supply power at full power and set the heating temperature to 500°C. When the display shows that the temperature measured by the thermocouple 12 exceeds 200°C, use a feeler gauge to check the gap between the inner ring of the bearing and the shaft. Once the gap reaches the disassembly requirement, stop heating and disconnect the connecting wires. Only remove the iron wire on the inside and remove the crawler heating plate 20 and the refractory fiber 21 along the axial direction. Finally, use a disassembly aid to smoothly remove the inner ring of the bearing from the main shaft. This solution not only improves the disassembly efficiency, but also avoids damage to the inner ring of the bearing and the main shaft. It has significant practical value and economic benefits.

[0026] In summary, the device for disassembling the inner ring of the bearing controls the power output of the heating by setting the crawler heating plate 20 regulated by the power regulator 11, and adjusts the temperature according to the number of crawler heating plates 20 and the required heating temperature. The main shaft is not damaged, and the inner ring of the bearing can be reused. The cost is reduced and the expensive replacement costs caused by high temperature or destructive operations are avoided. It can be widely used in the field of disassembling the inner ring of bearings of other large workpieces, such as the disassembly of the inner ring of the journal bearing of a large support roller. It also reduces the harmful gases and waste that may be generated by methods such as gas cutting.

[0027] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for disassembling a bearing inner ring, characterized in that: include: A control box (10) is provided, wherein a power regulator (11) and a thermocouple (12) are installed in the control box (10), a first wire (111) extends from the top of the power regulator (11), the first wire (111) is connected to a crawler-type heating plate (20), a second wire (121) extends from the top of the thermocouple (12), and a support rod (13) is provided on one side of the control box (10), and a clamping plate (131) for clamping an inner ring (30) is installed on the support rod (13).

2. The device for disassembling the inner ring of a bearing according to claim 1, characterized in that: The crawler-type heating plates (20) are connected via iron wires (201).

3. The device for disassembling the inner ring of a bearing according to claim 1, characterized in that: The outer side of the crawler-type heating plate (20) is wrapped with refractory fibers (21).

4. The device for disassembling the inner ring of a bearing according to claim 1, characterized in that: The control box (10) is provided with an adjusting knob (14) for adjusting the spacing between the support rods (13).

5. The device for disassembling the inner ring of a bearing according to claim 4, characterized in that: The number of the support rods (13) is four, the number of the adjusting knobs (14) is two, and each of the adjusting knobs (14) is capable of controlling two of the support rods (13).

6. The device for disassembling the inner ring of a bearing according to claim 5, characterized in that: An anti-slip pad (132) is adhered to the inner side of the clamping plate (131).

7. The device for disassembling the inner ring of a bearing according to claim 1, characterized in that: The power regulator (11) is provided with an adjustment button for adjusting the power of the crawler-type heating plate (20), and the control box (10) is installed with a display screen for displaying the power regulator (11).

8. The device for disassembling the inner ring of a bearing according to claim 7, characterized in that: The control box (10) is provided with a display screen for thermocouple (12) measurement.

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