Method and device for disassembling and assembling bearing of main shaft system

Abstract

The invention discloses a spindle system bearing dismounting and mounting method and device, and relates to the technical field of wind generating sets, the spindle system bearing dismounting and mounting device comprises a dismounting assembly, and a spindle is arranged in a bearing seat; the rear bearing outer ring is sleeved on the rear bearing inner ring, the rear bearing outer ring is arranged on the bearing seat, and the rear bearing inner ring is sleeved on the main shaft; the front bearing outer ring is sleeved on the front bearing inner ring, the front bearing outer ring is arranged on the bearing seat, and the front bearing inner ring is sleeved on the main shaft; the dismounting assembly comprises a cooling piece and a heating piece; the cooling piece is attached to the main shaft, the outer ring of the rear bearing and the outer ring of the front bearing; the heating piece is arranged on the bearing seat, the inner ring of the rear bearing and the inner ring of the front bearing; and gaps are formed between the inner ring of the rear bearing and the main shaft, between the outer ring of the rear bearing and the bearing seat, between the outer ring of the front bearing and the bearing seat and between the inner ring of the front bearing and the main shaft. And the equipment is prevented from being strained during dismounting.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine generator sets, and in particular to a main shaft system bearing disassembly and assembly method and a main shaft system bearing disassembly and assembly device. Background Art

[0002] In the current existing technology, for large-scale equipment of wind turbines, the tapered roller bearings of the main shaft system are usually disassembled by mechanical force, which is easy to cause strain; and the oil pressure disassembly method cannot form oil film molecules on the bearing mating surface to maintain the pressure, so the solution is not applicable. Summary of the invention

[0003] The main purpose of the present invention is to propose a spindle system bearing disassembly and assembly method and a spindle system bearing disassembly and assembly device, aiming to solve the technical problems in the prior art that the spindle system of large-scale equipment is dismantled in a single manner, the disassembly effect is poor, and it is easy to cause damage to the equipment.

[0004] To achieve the above object, the present invention provides a method for disassembling and assembling a bearing of a spindle system, the method comprising:

[0005] Cooling the main shaft for the first time and heating the inner ring of the rear bearing to form a first gap between the main shaft and the inner ring of the rear bearing;

[0006] The inner ring of the rear bearing is removed from the main shaft, and the main shaft is separated from the bearing seat at the same time;

[0007] Cooling the outer wall of the outer ring of the rear bearing and heating the outer wall of the bearing seat to form a second gap between the bearing seat and the outer ring of the rear bearing;

[0008] Removing the outer ring of the rear bearing from the bearing seat;

[0009] Cooling the outer ring of the front bearing and heating the outer wall of the bearing seat to form a third gap between the outer ring of the front bearing and the bearing seat;

[0010] Removing the front bearing outer ring from the bearing seat;

[0011] Cooling the inner wall of the main shaft for a second time and heating the inner ring of the front bearing to form a fourth gap between the main shaft and the inner ring of the front bearing;

[0012] Remove the front bearing inner race from the main shaft.

[0013] In one embodiment, the step of cooling the main shaft for the first time and heating the inner ring of the rear bearing comprises:

[0014] Performing a first cooling on the spindle by means of a cooling member;

[0015] After a preset time has passed, the inner ring of the rear bearing is heated by a heating element.

[0016] In one embodiment, the step of heating the outer ring of the rear bearing by a heating element comprises:

[0017] heating the inner ring of the rear bearing according to a preset temperature;

[0018] Wherein, the preset temperature is 90°C to 100°C.

[0019] In one embodiment, the step of removing the main shaft from the inner ring of the rear bearing comprises:

[0020] detecting a width of the first gap;

[0021] Determining whether the width of the first gap is greater than or equal to a preset size;

[0022] When the width of the first gap is greater than or equal to the preset size, the inner ring of the rear bearing is removed from the main shaft.

[0023] In order to solve the above problems, the present invention further proposes a spindle system bearing disassembly and assembly device, which is applied to the spindle system bearing disassembly and assembly method as described above, and the spindle system bearing disassembly and assembly device comprises:

[0024] A main shaft and a bearing seat, wherein the main shaft is arranged in the bearing seat;

[0025] A rear bearing inner ring and a rear bearing outer ring, wherein the rear bearing outer ring is sleeved on the rear bearing inner ring, the rear bearing outer ring is arranged on the bearing seat, and the rear bearing inner ring is sleeved on the main shaft;

[0026] A front bearing outer ring and a front bearing inner ring, wherein the front bearing outer ring is sleeved on the front bearing inner ring, the front bearing outer ring is arranged on the bearing seat, and the front bearing inner ring is sleeved on the main shaft;

[0027] A dismantling component, the dismantling component includes a cooling element and a heating element, the cooling element is attached to the main shaft, the outer ring of the rear bearing and the outer ring of the front bearing; the heating element is arranged on the bearing seat, the inner ring of the rear bearing and the inner ring of the front bearing; and is used to form a gap between the inner ring of the rear bearing and the main shaft, between the outer ring of the rear bearing and the bearing seat, between the outer ring of the front bearing and the bearing seat, and between the inner ring of the front bearing and the main shaft.

[0028] In one embodiment, the removal assembly further comprises:

[0029] A fixing tool, the fixing tool is used to be fixed on the bearing seat;

[0030] a first ejector, wherein one end of the first ejector is used to abut against the fixed fixture, and the other end of the first ejector is used to abut against the main shaft;

[0031] Wherein, when the cooling member is attached to the main shaft to shrink the main shaft and the heating member is arranged on the inner ring of the rear bearing to expand the inner ring of the rear bearing, the first ejection member is ejected to eject the main shaft and the inner ring of the rear bearing from the bearing seat together.

[0032] In one embodiment, the outer ring of the rear bearing has a first accommodating groove, the first accommodating groove is provided with a pull ring, and the pull ring is used to connect with an external lifting device through a connecting piece;

[0033] When the cooling element is attached to the outer ring of the rear bearing and the heating element is arranged at a position on the outer wall of the bearing seat corresponding to the outer ring of the rear bearing, the lifting device pulls the outer ring of the rear bearing together with the first accommodating groove out of the bearing seat.

[0034] In one embodiment, the inner wall of the bearing seat has a flange extending inward, the outer ring of the front bearing is arranged on the flange, the flange is provided with an ejection hole, and the ejection hole is provided with an ejection screw;

[0035] Wherein, when the cooling element is attached to the outer ring of the front bearing and the heating element is arranged at a position of the outer wall of the bearing seat corresponding to the outer ring of the front bearing, the ejection screw is turned to eject the outer ring of the front bearing out of the bearing seat.

[0036] In one embodiment, the removal assembly further comprises:

[0037] A supporting fixture, the supporting fixture is arranged on the outer wall of the main shaft and is arranged opposite to the inner ring of the front bearing;

[0038] a second ejector, one end of which is disposed on the supporting fixture and the other end of which is in contact with the inner ring of the front bearing;

[0039] Wherein, when the heating element is arranged on the inner ring of the front bearing and the cooling element is attached to the inner wall of the main shaft at a position corresponding to the inner ring of the front bearing, the second ejecting element is ejected to eject the inner ring of the front bearing from the main shaft.

[0040] In one embodiment, the removal assembly further comprises an adjustment tool, and the adjustment tool is disposed on the inner wall of the spindle;

[0041] The adjusting tool is used to adjust the position of the cooling member so that it corresponds to the position of the inner ring of the front bearing.

[0042] The technical solution of the present invention is to respectively set cooling parts on the main shaft, the outer ring of the rear bearing and the outer ring of the front bearing for temperature reduction treatment, and set heating parts on the bearing seat, the inner ring of the rear bearing and the inner ring of the front bearing for temperature increase treatment. Thus, gaps are formed between the inner ring of the rear bearing and the main shaft, between the outer ring of the rear bearing and the bearing seat, between the outer ring of the front bearing and the bearing seat, and between the inner ring of the front bearing and the main shaft, which is conducive to the separation between them, avoids damage to the equipment, and improves the reliability of the equipment during dismantling. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0044] Figure 1 It is a structural schematic diagram of the spindle system bearing disassembly and assembly device of the present invention;

[0045] Figure 2 It is a structural schematic diagram of a first embodiment of a spindle system bearing disassembly and assembly device of the present invention;

[0046] Figure 3 It is a schematic structural diagram of the inner ring of the rear bearing in the spindle system bearing disassembly and assembly device of the present invention;

[0047] Figure 4 It is a structural schematic diagram of a second embodiment of the spindle system bearing disassembly and assembly device of the present invention;

[0048] Figure 5 It is a schematic structural diagram of the outer ring of the rear bearing in the spindle system bearing disassembly and assembly device of the present invention;

[0049] Figure 6 It is a structural schematic diagram of a third embodiment of the spindle system bearing disassembly and assembly device of the present invention;

[0050] Figure 7 It is a schematic structural diagram of the outer ring of the front bearing in the spindle system bearing disassembly and assembly device of the present invention;

[0051] Figure 8 It is a structural schematic diagram of a fourth embodiment of the spindle system bearing disassembly and assembly device of the present invention;

[0052] Fig. 9 It is a schematic structural diagram of the inner ring of the front bearing in the spindle system bearing disassembly and assembly device of the present invention;

[0053] Fig.10 It is a schematic flow chart of a first embodiment of a method for disassembling and assembling a bearing of a spindle system according to the present invention;

[0054] Fig.11 It is a schematic flow chart of a second embodiment of the method for disassembling and assembling a bearing of a spindle system of the present invention;

[0055] Fig.12 It is a schematic flow chart of a third embodiment of the method for disassembling and assembling a bearing of a spindle system of the present invention;

[0056] Fig.13 It is a schematic flow chart of a fourth embodiment of a method for disassembling and assembling a bearing of a spindle system according to the present invention.

[0057] Description of Figure Numbers:

[0058] 10. Spindle; 11. Mounting hole; 20. Bearing seat; 21. Flanging; 31. Cooling element; 32. Heating element; 33. Fixing tool; 34. First ejector; 35. Ejector screw; 36. Support tool; 37. Second ejector; 38. Adjusting tool; 40. Rear bearing inner ring; 50. Rear bearing outer ring; 51. Pull ring; 52. Connecting piece; 53. First accommodating groove; 60. Front bearing outer ring; 61. Second accommodating groove; 70. Front bearing inner ring.

[0059] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] The present invention proposes a method for disassembling and assembling a bearing of a spindle system. Fig.10 , Fig.10 It is a schematic flow chart of the first embodiment of the method for disassembling and assembling a bearing of a spindle system of the present invention.

[0064] The spindle system bearing disassembly and assembly method of the present invention comprises the following steps:

[0065] Step S10: cooling the main shaft 10 for the first time and heating the rear bearing inner ring 40 to form a first gap between the main shaft 10 and the rear bearing inner ring 40;

[0066] Step S20: removing the rear bearing inner ring 40 from the main shaft 10 and separating the main shaft 10 from the bearing seat at the same time;

[0067] Step S30: cooling the outer wall of the rear bearing outer ring 50 and heating the outer wall of the bearing seat 20 to form a second gap between the bearing seat 20 and the rear bearing outer ring 50;

[0068] Step S40: removing the rear bearing outer ring 50 from the bearing seat 20;

[0069] Step S50: cooling the front bearing outer ring 60 and heating the outer wall of the bearing seat (20) so as to form a third gap between the front bearing outer ring 60 and the bearing seat 20;

[0070] Step S60: removing the front bearing outer ring 60 from the bearing seat 20;

[0071] Step S70: cooling the inner wall of the main shaft 10 for a second time, and heating the front bearing inner ring 70, so as to form a fourth gap between the main shaft 10 and the front bearing inner ring 70;

[0072] Step S80: removing the front bearing inner ring 70 from the main shaft 10 .

[0073] In one embodiment of the present invention, a spindle system bearing disassembly and assembly device is also included. The spindle system bearing disassembly and assembly device is applied to the spindle system bearing disassembly and assembly method as described above. The spindle system bearing disassembly and assembly device is mainly composed of a spindle 10 and a bearing seat 20. Figure 1 The main shaft 10 and the bearing seat 20 are placed vertically, and the bearing seat 20 is sleeved on the outside of the main shaft 10. Among them, the top of the main shaft 10 is provided with a rear bearing, and the bottom of the main shaft 10 is provided with a front bearing.

[0074] The rear bearing includes a rear bearing inner ring 40 and a rear bearing outer ring 50, and the rear bearing outer ring 50 is sleeved on the rear bearing inner ring 40. The inner wall of the rear bearing inner ring 40 abuts against the outer wall of the main shaft 10, and the outer wall of the rear bearing outer ring 50 abuts against the inner wall of the bearing seat 20. Similarly, the front bearing also includes a front bearing inner ring 70 and a front bearing outer ring 60, and the front bearing outer ring 60 is sleeved on the front bearing inner ring 70. The inner wall of the front bearing inner ring 70 abuts against the outer wall of the main shaft 10, and the outer wall of the front bearing outer ring 60 abuts against the inner wall of the bearing seat 20.

[0075] Furthermore, in this embodiment, interference fit connections are adopted between the rear bearing inner ring 40 and the main shaft 10 , between the front bearing inner ring 70 and the main shaft 10 , between the rear bearing outer ring 50 and the bearing seat 20 , and between the front bearing outer ring 60 and the bearing seat 20 .

[0076] In this embodiment, the main shaft 10 and the bearing seat 20 are used for a wind turbine generator set, which are relatively large in size and heavy in weight. When the front bearing and the rear bearing need to be removed, the removal assembly can be used to assist in the removal.

[0077] The dismantling components specifically include a cooling element 31 and a heating element 32. The cooling element 31 can be made of, for example, dry ice, liquid nitrogen, solid hydrogen, etc.; the heating element 32 can be made of, for example, a medium or high frequency induction heater, a silicone heating sheet, a heating resistor, etc., and is connected to an external power supply through a flexible coil.

[0078] To improve the removal efficiency, in this embodiment, the rear bearing inner ring 40, the rear bearing outer ring 50, the front bearing outer ring 60 and the front bearing inner ring 70 are removed in sequence according to a preset order.

[0079] Specifically, when removing the rear bearing inner ring 40, please refer to Figure 2 and Figure 3A fixing fixture 33 is arranged on the top of the bearing seat 20. The fixing fixture 33 is a metal steel frame, and its size is adapted to the bearing seat 20. The edge of the fixing fixture 33 is connected and fixed to the edge of the bearing seat 20 by screws or bolts. A first ejector 34 is arranged between the fixing fixture 33 and the main shaft 10. The first ejector 34 can be, for example, a jack.

[0080] Then, the cooling element 31 is set on the main shaft 10, and the heating element 32 is set on the outer wall of the bearing seat 20 to cool the main shaft 10. After being cooled, the main shaft 10 shrinks inward, while the bearing seat 20 expands outward after being heated, thereby forming a gap between the main shaft 10 and the inner ring 40 of the rear bearing.

[0081] After the main shaft 10 is cooled and the rear bearing inner ring 40 is heated, the first ejector 34 is extended to eject the rear bearing inner ring 40 from the main shaft 10. When the rear bearing inner ring 40 is taken out from the main shaft 10, the main shaft 10 is separated from the bearing seat 20, the rear bearing outer ring 50 and the front bearing outer ring 60 remain on the bearing seat 20, and the front bearing inner ring 70 remains on the main shaft 10.

[0082] For further information, see Fig.11 , Fig.11 This is a flow chart of the second embodiment of the spindle system bearing disassembly and assembly method of the present invention. Step S10 includes:

[0083] Step S11: cooling the spindle 10 for the first time by a cooling member;

[0084] Step S12: After a preset time has passed, the rear bearing inner ring 40 is heated by a heating element.

[0085] In order to smoothly remove the main shaft 10 from the rear bearing inner ring 40 and the bearing seat 20, the cooling member 31 should be placed on the main shaft 10 first, and the main shaft 10 should be cooled for a preset time before the heating member 32 is set on the rear bearing inner ring 40. The heating member 32 is set to heat the rear bearing inner ring 40 at a preset temperature.

[0086] The preset time can be set to 30 minutes or more to ensure that the spindle 10 is completely cooled.

[0087] For further information, see Fig.12 , Fig.12 The flowchart of the third embodiment of the method for disassembling and assembling the bearing of the spindle system of the present invention is shown in FIG. Step S12 specifically includes:

[0088] Step S121: heating the rear bearing inner ring 40 according to a preset temperature.

[0089] The preset temperature can be set between 90°C and 100°C.

[0090] It should be noted that while the rear bearing inner ring 40 is heated by the heating element 32 , the cooling element 31 is kept to cool the main shaft 10 to ensure that a stable gap is formed between the main shaft 10 and the rear bearing inner ring 40 .

[0091] For further information, see Figure 3 The end of the main shaft 10 corresponding to the rear bearing inner ring 40 is the top end, and the top end of the main shaft 10 is also provided with a plurality of mounting holes 11, which can be pin holes and / or threaded holes. When removing, the cooling member 31 can be inserted into the mounting hole 11.

[0092] Continue reading Figure 4 After the main shaft 10 is ejected from the bearing seat 20, the rear bearing outer ring 50 is still connected to the bearing seat 20 by interference fit. Therefore, the cooling member 31 is continued to be used to cool the rear bearing outer ring 50, and the heating member 32 is used to heat the outer wall of the bearing seat 20.

[0093] It should be noted that when removing the rear bearing outer ring 50, the rear bearing inner ring 40, the front bearing outer ring 60, or the front bearing inner ring 70, they must first be cooled by the cooling element 31 for a preset period of time and then heated by the heating element 32 at a preset temperature.

[0094] In this embodiment, please refer to Figure 5 The cooling element 31 is placed on the side of the rear bearing outer ring 50 close to the inner wall thereof. The heating element 32 is arranged on the outer wall of the bearing seat 20 , and the position of the heating element 32 corresponds to the installation position of the rear bearing outer ring 50 .

[0095] When the rear bearing outer ring 50 is cooled by the cooling member 31 and the outer wall of the bearing seat 20 is heated by the heating member 32 , a gap is also formed therebetween to facilitate the removal of the rear bearing outer ring 50 from the bearing seat 20 .

[0096] Specifically, a first accommodating groove 53 is provided on the rear bearing outer ring 50, and a pull ring 51 is provided on the first accommodating groove 53. One end of a connecting member 52 is connected to the pull ring 51, and the other end is used to connect to an external lifting device. The connecting member 52 can be, for example, a metal chain to improve its load-bearing capacity. The first accommodating groove 53 is pulled up from the bearing seat 20 by the lifting device, and the rear bearing outer ring 50 is taken out of the bearing seat 20 at the same time.

[0097] To ensure that the cooling element 31 can fully contact the rear bearing outer ring 50, a first receiving groove 53 is provided on the rear bearing outer ring 50, so that dry ice can be filled into the first receiving groove 53. The notch of the first receiving groove 53 is set upward to prevent dry ice from falling out of the first receiving groove 53.

[0098] The depth of the first accommodating groove 53 is matched with the thickness of the rear bearing outer ring 50 to ensure that the cooling member 31 can fully contact the rear bearing outer ring 50 to cool it down.

[0099] After the rear bearing inner ring 40 is removed from the bearing seat 20, continue to remove the front bearing outer ring 60 from the bearing seat 20. Figure 6 The bottom of the bearing seat 20 has a flange 21, and the top of the front bearing outer ring 60 abuts against the flange 21, thereby limiting its position.

[0100] The flange 21 is arranged in a ring shape along the edge of the bearing seat 20 . A plurality of ejection holes are arranged on the flange 21 . Ejection screws 35 are arranged in the ejection holes.

[0101] When the front bearing outer ring 60 needs to be removed from the bearing seat 20, refer to Figure 7 , the cooling element 31 is placed in the front bearing outer ring 60, and the heating element 32 is arranged on the outer wall of the bearing seat 20. And the position of the heating element 32 corresponds to the installation position of the front bearing outer ring 60.

[0102] When the front bearing outer ring 60 is cooled by the cooling member 31 and the outer wall of the bearing seat 20 is heated by the heating member 32 , a gap is also formed therebetween to facilitate the removal of the front bearing outer ring 60 from the bearing seat 20 .

[0103] Specifically, the ejection screws 35 at various positions are screwed alternately to eject the front bearing outer ring 60 from the bearing seat 20 .

[0104] To ensure that the cooling element 31 can fully contact the front bearing outer ring 60, a second receiving groove 61 is provided on the front bearing outer ring 60 to facilitate filling the dry ice into the second receiving groove 61. The notch of the second receiving groove 61 is arranged upward to prevent the dry ice from falling out of the second receiving groove 61.

[0105] The depth of the second accommodating groove 61 is matched with the thickness of the front bearing outer ring 60 to ensure that the cooling member 31 can fully contact the front bearing outer ring 60 to cool it down.

[0106] Further, after the front bearing inner ring 70 is removed from the bearing seat 20, the front bearing inner ring 70 is further removed from the main shaft 10. Figure 8 The front bearing inner ring 70 is sleeved on the outer wall of the main shaft 10. In order to smoothly remove the front bearing inner ring 70 from the main shaft 10, the removal assembly also includes a supporting tool 36 and a second ejector 37.

[0107] The second ejector 37 can also be a jack, see Figure 8The bottom of the main shaft 10 is relatively wide and can be used to place the support fixture 36. After the support fixture 36 is fixed, its top surface and the bottom surface of the front bearing inner ring 70 are arranged opposite to each other, the bottom of the second ejector 37 is clamped on the top surface of the support fixture 36, and the top of the second ejector 37 is clamped on the bottom surface of the front bearing inner ring 70.

[0108] The cooling element 31 is used to cool the inner wall of the main shaft 10 , and the heating element 32 is used to heat the front bearing inner ring 70 , thereby forming a gap between the front bearing inner ring 70 and the main shaft 10 .

[0109] When a gap is formed between the front bearing inner ring 70 and the main shaft 10 , the second ejector 37 is controlled to extend, thereby ejecting the front bearing inner ring 70 from the main shaft 10 .

[0110] To ensure that the inner wall of the main shaft 10 can fully contact the cooling member 31, the dismantling assembly further includes an adjusting fixture 38. The adjusting fixture 38 can be similar in structure to the fixing fixture 33. The height of the adjusting fixture 38 is adjusted so that the position of the adjusting fixture 38 corresponds to the position of the front bearing inner ring 70.

[0111] A third containing groove is provided at the edge of the adjusting tool 38, and dry ice can be filled in the third containing groove so that the dry ice can fully contact the inner wall of the main shaft 10 to reduce the temperature.

[0112] Furthermore, in order to ensure that the gaps formed between the rear bearing inner ring 40 and the main shaft 10, between the front bearing inner ring 70 and the main shaft 10, between the rear bearing outer ring 50 and the bearing seat 20, and between the front bearing outer ring 60 and the bearing seat 20 meet the disassembly requirements.

[0113] For further information, see Fig.13 , Fig.13 This is a flow chart of a fourth embodiment of the method for disassembling and assembling a bearing of a spindle system according to the present invention. Step S20 specifically includes:

[0114] Step S21: detecting the width of the first gap;

[0115] Step S22: determining whether the width of the first gap is greater than or equal to a preset size;

[0116] Step S23: when the width of the first gap is greater than or equal to the preset size, the rear bearing inner ring 40 is removed from the main shaft 10 .

[0117] Specifically, to ensure stable disassembly, the gap should be greater than or equal to a preset size, and the gap size can be measured by a feeler gauge.

[0118] The preset size can be set to 0.02 mm. That is, when the gaps between the rear bearing inner ring 40 and the main shaft 10, between the front bearing inner ring 70 and the main shaft 10, between the rear bearing outer ring 50 and the bearing seat 20, and between the front bearing outer ring 60 and the bearing seat 20 are greater than or equal to 0.02 mm, the rear bearing inner ring 40, the rear bearing outer ring 50, the front bearing outer ring 60, and the front bearing inner ring 70 can be removed.

[0119] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for disassembling and assembling a bearing of a spindle system, characterized in that: The spindle system bearing disassembly and assembly method comprises: Cooling the main shaft (10) for the first time and heating the inner ring of the rear bearing (40) so as to form a first gap between the main shaft (10) and the inner ring of the rear bearing (40); The rear bearing inner ring (40) is removed from the main shaft (10), and at the same time, the main shaft (10) is separated from the bearing seat; Cooling the outer wall of the rear bearing outer ring (50) and heating the outer wall of the bearing seat (20) so as to form a second gap between the bearing seat (20) and the rear bearing outer ring (50); Removing the rear bearing outer ring (50) from the bearing seat (20); Cooling the front bearing outer ring (60) and heating the outer wall of the bearing seat (20) so as to form a third gap between the front bearing outer ring (60) and the bearing seat (20); Removing the front bearing outer ring (60) from the bearing seat (20); Cooling the inner wall of the main shaft (10) for a second time and heating the inner ring of the front bearing (70) so as to form a fourth gap between the main shaft (10) and the inner ring of the front bearing (70); The front bearing inner ring (70) is removed from the main shaft (10).

2. The method for disassembling and assembling the bearing of the spindle system according to claim 1, characterized in that: The steps of cooling the main shaft (10) for the first time and heating the inner ring (40) of the rear bearing include: Performing a first cooling on the main shaft (10) by means of a cooling member; After a preset time has passed, the rear bearing inner ring (40) is heated by a heating element.

3. The method for disassembling and assembling the bearing of the spindle system according to claim 2, characterized in that: The step of heating the rear bearing outer ring (50) by means of a heating element comprises: heating the inner ring (40) of the rear bearing according to a preset temperature; Wherein, the preset temperature is 90°C to 100°C.

4. The spindle system bearing disassembly and assembly method according to claim 1, characterized in that: The step of removing the main shaft from the rear bearing inner ring (40) comprises: detecting a width of the first gap; Determining whether the width of the first gap is greater than or equal to a preset size; When the width of the first gap is greater than or equal to the preset size, the rear bearing inner ring (40) is removed from the main shaft (10).

5. A spindle system bearing disassembly and assembly device, characterized in that: The spindle system bearing disassembly and assembly device is applied to the spindle system bearing disassembly and assembly method according to any one of claims 1 to 4, and the spindle system bearing disassembly and assembly device comprises: A main shaft (10) and a bearing seat (20), wherein the main shaft (10) is arranged in the bearing seat (20); a rear bearing inner ring (40) and a rear bearing outer ring (50), wherein the rear bearing outer ring (50) is sleeved on the rear bearing inner ring (40), the rear bearing outer ring (50) is arranged on the bearing seat (20), and the rear bearing inner ring (40) is sleeved on the main shaft (10); A front bearing outer ring (60) and a front bearing inner ring (70), wherein the front bearing outer ring (60) is sleeved on the front bearing inner ring (70), the front bearing outer ring (60) is arranged on the bearing seat (20), and the front bearing inner ring (70) is sleeved on the main shaft (10); A dismantling assembly, the dismantling assembly comprising a cooling element (31) and a heating element (32), wherein the cooling element (31) is attached to the main shaft (10), the rear bearing outer ring (50) and the front bearing outer ring (60); the heating element (32) is arranged on the bearing seat (20), the rear bearing inner ring (40) and the front bearing inner ring (70); and is used to form a gap between the rear bearing inner ring (40) and the main shaft (10), between the rear bearing outer ring (50) and the bearing seat (20), between the front bearing outer ring (60) and the bearing seat (20), and between the front bearing inner ring (70) and the main shaft (10).

6. The spindle system bearing disassembly and assembly device according to claim 5, characterized in that: The removal assembly also includes: A fixing tool (33), wherein the fixing tool (33) is used to be fixed on the bearing seat (20); a first ejector (34), one end of the first ejector (34) being used for abutting against the fixing fixture (33), and the other end of the first ejector (34) being used for abutting against the main shaft (10); When the cooling member (31) is attached to the main shaft (10) to shrink the main shaft (10), and the heating member (32) is arranged on the rear bearing inner ring (40) to expand the rear bearing inner ring (40), the first ejection member (34) is ejected to eject the main shaft (10) and the rear bearing inner ring (40) together from the bearing seat (20).

7. The spindle system bearing disassembly and assembly device according to claim 5, characterized in that: The outer ring (50) of the rear bearing has a first accommodating groove (53) therein, and the first accommodating groove (53) is provided with a pull ring (51), and the pull ring (51) is used to connect with an external lifting device through a connecting piece (52); When the cooling element (31) is attached to the rear bearing outer ring (50) and the heating element (32) is arranged at a position on the outer wall of the bearing seat (20) corresponding to the rear bearing outer ring (50), the lifting device pulls the rear bearing outer ring (50) and the first accommodating groove (53) out of the bearing seat (20).

8. The spindle system bearing disassembly and assembly device according to claim 5, characterized in that: The inner wall of the bearing seat (20) is provided with a flange (21) extending inwardly, the front bearing outer ring (60) is arranged on the flange (21), the flange (21) is provided with an ejection hole, and an ejection screw (35) is arranged in the ejection hole; When the cooling element (31) is attached to the front bearing outer ring (60) and the heating element (32) is arranged at a position on the outer wall of the bearing seat (20) corresponding to the front bearing outer ring (60), the ejection screw (35) is turned to eject the front bearing outer ring (60) out of the bearing seat (20).

9. The spindle system bearing disassembly and assembly device according to claim 5, characterized in that: The removal assembly also includes: A supporting tool (36), wherein the supporting tool (36) is arranged on the outer wall of the main shaft (10) and is arranged opposite to the inner ring (70) of the front bearing; a second ejector (37), one end of the second ejector (37) being disposed on the supporting fixture (36), and the other end of the second ejector (37) being in contact with the inner ring (70) of the front bearing; When the heating element (32) is arranged on the front bearing inner ring (70) and the cooling element (31) is attached to the inner wall of the main shaft (10) at a position corresponding to the front bearing inner ring (70), the second ejection element (37) is ejected to eject the front bearing inner ring (70) from the main shaft (10).

10. The spindle system bearing disassembly and assembly device according to claim 9, characterized in that: The dismantling assembly further comprises an adjusting tool (38), wherein the adjusting tool (38) is arranged on the inner wall of the main shaft (10); The adjusting tool (38) is used to adjust the position of the cooling element (31) so that it corresponds to the position of the front bearing inner ring (70).

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