A hot sleeve device, method and blower for a shaft system punching sheet

Abstract

The present invention relates to the field of installation of motor shaft punching sheets, and particularly to a hot sleeve device, method and blower for shaft punching sheets. The device includes a magnetic isolation ring, a punching sheet positioning block, punching sheets and a clearance ring; the punching sheet positioning block is provided with a positioning hole; a plurality of punching sheets are stacked and attached to each other along the axial direction, and the outer surface of the punching sheet is matched with the inner surface of the positioning hole, and the end face of the innermost punching sheet is attached to the outer end face of the magnetic isolation ring; the clearance ring is provided with a clearance ring positioning surface, the clearance ring positioning surface is matched with the inner surface of the positioning hole, and the inner side surface of the clearance ring is attached to the end face of the outermost punching sheet. The device punches the stacked punching sheets simultaneously after positioning the magnetic isolation ring, the unpunched punching sheets and the clearance ring in the positioning hole, ensuring the concentricity of the inner holes of multiple punching sheets, reducing the time for machining the inner holes of the punching sheets, and improving the punching sheet stacking efficiency; after hot sleeving, the redundant materials of the punching sheet positioning block and the clearance ring as well as the outer end margin of the punching sheet are removed simultaneously, improving the concentricity between the outer circular end faces of the punching sheets.

Description

Technical Field

[0001] The present invention relates to the field of installation of motor shaft punching sheets, and particularly to a hot sleeve device, method and blower for shaft punching sheets. Background Art

[0002] The shaft system of a magnetic levitation blower uses a magnetic levitation axial thrust bearing to limit the axial direction of the shaft system. When using the magnetic levitation axial thrust bearing, the shaft system is connected to the thrust disc, and the thrust disc needs to be axially located between two thrust bearings; therefore, it is necessary to detect the axial position of the shaft system, and punching sheets need to be installed on the shaft system; however, due to the large number of punching sheets, it is very difficult to directly stack the punching sheets on the rotor, whether in assembly or processing, and it is difficult to ensure the axial position and concentricity between the stacked sheets and the rotor, resulting in inaccurate detection of the axial position of the entire rotor.

[0003] Chinese Patent Application for Invention (Publication No. CN102208849B, Publication Date: Mar. 13, 2013) discloses a hot sleeve shaft device for a wind power rotor and its hot sleeve shaft process, including a core punching sheet, a dummy shaft, and an outer support structure. By stacking the core punching sheets on the dummy shaft and fixing them by the outer support structure, after stacking, the dummy shaft is withdrawn, and the rotor shaft is hot inserted into the rotor core. After using this method, the damage to the shaft and the rotor shaft hole is small. As long as the expansion amount is sufficient, it is even possible not to press the shaft, and relying on the self-weight of the shaft, it can be inserted in place at one time, greatly shortening the stacking time and heating time, and saving the use of energy.

[0004] The prior art has the following deficiencies: Each punching sheet needs to be processed with an inner hole before stacking. When the number of stacked punching sheets is large, more time is required for processing the inner hole, which is not conducive to quickly stacking the punching sheets. At the same time, each time a set of punching sheets is sleeved, it is necessary to use a through groove bar to check the groove shape of each groove to ensure that the through groove bar can pass through each groove to ensure the concentricity between the punching sheets; when the number of punching sheets is large, it is necessary to assemble, detect and adjust the punching sheets multiple times, reducing the punching sheet stacking efficiency. Moreover, the concentricity adjustment is based on the inner hole of the punching sheet without adjusting the concentricity of the outer circular end face of the punching sheet, resulting in poor concentricity between the outer circular end faces of the punching sheets. Summary of the Invention

[0005] The object of the present invention is: In view of the above problems, it is proposed to punch the stacked punching sheets simultaneously after positioning the magnetic isolation ring, the unpunched punching sheet and the gap ring in the positioning holes, to ensure the concentricity of the inner holes of multiple punching sheets, reduce the time for processing the inner holes of the punching sheets, and improve the punching sheet stacking efficiency; after hot sleeving, the redundant materials of the punching sheet positioning block and the gap ring and the outer end margin of the punching sheet are removed simultaneously to improve the concentricity between the outer circular end faces of the punching sheets, a hot sleeve device for shaft punching sheets.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hot sleeve device for shaft punching sheets, which includes a magnetic isolation ring, a punching sheet positioning block, punching sheets and a clearance ring. The inner holes of the magnetic isolation ring and the clearance ring are of the same size and their centers are located on the same axis. The punching sheet positioning block is provided with a positioning hole, the outer surface of the magnetic isolation ring is matched with the inner surface of the positioning hole, and the inner end face of the magnetic isolation ring is in contact with the bottom surface of the positioning hole. A plurality of punching sheets are stacked and distributed along the axial direction and the outer surface of the punching sheet is matched with the inner surface of the positioning hole. The end face of the innermost punching sheet is in contact with the outer end face of the magnetic isolation ring. The clearance ring is detachably connected to the punching sheet positioning block. The clearance ring is provided with a clearance ring positioning surface, the clearance ring positioning surface is matched with the inner surface of the positioning hole, and the inner side face of the clearance ring is in contact with the end face of the outermost punching sheet.

[0008] Preferably, the bottom surface of the punching sheet positioning block is provided with a bottom hole, the diameter of the bottom hole is larger than the inner hole diameter of the magnetic isolation ring and smaller than the outer end face diameter of the magnetic isolation ring. The center of the bottom hole and the center of the inner hole of the magnetic isolation ring are located on the same axis.

[0009] Preferably, the punching sheet positioning block is provided with a fixing boss, and the clearance ring is provided with a connecting boss; the fixing boss and the connecting boss are connected, and the outer end face of the fixing boss is not in contact with the inner end face of the connecting boss. The fixing boss and the connecting boss are connected by screws or bolts. A plurality of fixing holes of the fixing boss and the connecting boss are distributed along the circumferential direction and are aligned with each other.

[0010] In addition, the present invention also discloses a method for installing shaft punching sheets, which uses a hot sleeve device for shaft punching sheets. The method includes the following steps:

[0011] (S1) Feeding and positioning of the magnetic isolation ring: Place the magnetic isolation ring in the positioning hole and the inner end face of the magnetic isolation ring is in contact with the bottom surface of the positioning hole;

[0012] (S2) Feeding and positioning of the punching sheets: Stack and place a set number of punching sheets in the positioning hole in contact with each other, and the end face of the innermost punching sheet is in contact with the outer end face of the magnetic isolation ring;

[0013] (S3) Feeding and positioning of the clearance ring: Match the clearance ring positioning surface with the inner surface of the positioning hole, and the inner side face of the clearance ring is in contact with the end face of the outermost punching sheet;

[0014] (S4) Locking of the clearance ring: Connect and lock the clearance ring to the punching sheet positioning block to press the plurality of punching sheets against each other;

[0015] Processing the inner hole of the punching sheet: Simultaneously process the inner holes of the plurality of locked punching sheets;

[0016] (S5) Hot sleeving: After heating the entire device, hot sleeve the magnetic isolation ring, punching sheets and clearance ring onto the shaft system, and the outer end face of the clearance ring is pressed and fitted with the corresponding end face of the thrust disk; after the hot sleeving cools down, the magnetic isolation ring, punching sheets and clearance ring shrink and are fixed on the shaft system;

[0017] (S6)Removing redundant materials: Remove the redundant materials of the punching sheet positioning block and the clearance ring to the set size to complete the installation process of the shaft system punching sheet.

[0018] Preferably, when removing the redundant materials of the punching sheet positioning block and the clearance ring, first turn the redundant materials, and then grind the outer circle of the turned surface.

[0019] In addition, the present invention also discloses a magnetic levitation blower, which includes a magnetic isolation ring, a plurality of superposed and adhered punching sheets, a clearance ring, a motor shaft, a thrust disk and an axial sensor; the inner holes of the thrust disk, the magnetic isolation ring, the punching sheets and the clearance ring are respectively matched with the outer surfaces of the same shaft segments of the motor shaft; the thrust disk, the clearance ring, the plurality of superposed and adhered punching sheets and the magnetic isolation ring are linearly adjacent to each other along the axial direction of the motor shaft, and the axial side end face of the thrust disk is adhered to the corresponding shaft shoulder of the motor shaft; the magnetic isolation ring, the punching sheets and the clearance ring are installed on the motor shaft by the method described above; the output end of the axial sensor is connected to the position where the punching sheet is located.

[0020] Preferably, the blower is also provided with a speed sensor, and the output end of the speed sensor is connected to the motor shaft.

[0021] The advantages of the hot sleeve device for the shaft system punching sheet adopting the above technical solution of the present invention are as follows:

[0022] Only by ensuring the processing dimensions of the magnetic isolation ring, the punching sheet positioning block and the clearance ring can the overall thickness after the punching sheets are laminated be effectively ensured, so as to ensure the axial position of the laminated punching sheets on the shaft system. At the same time, after the punching sheets are laminated and locked to the positioning holes, holes are punched for all the laminated punching sheets at the same time, which ensures the concentricity of the inner holes of multiple punching sheets and also avoids the situation that each punching sheet needs to be punched first and then laminated; punching holes at the same time after the punching sheets are laminated also does not require adjusting and detecting the inner holes of the punching sheets every time the punching sheets are laminated, improving the lamination efficiency of the punching sheets and making the processing and installation relatively more convenient. Moreover, after the punching sheets and other parts are hot sleeved onto the shaft system, the redundant materials of the punching sheet positioning block and the clearance ring as well as the allowance of the punching sheets are removed at the same time, so that the outer circle end face dimensions of multiple punching sheets are the same, improving the concentricity between the outer circle end faces of multiple punching sheets. And the size can be measured before hot sleeving, and the number of punching sheets can be checked for errors and adjusted at any time, reducing the rejection rate of parts. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a magnetic levitation blower.

[0024] Figure 2 It is a schematic structural diagram of the present invention.

[0025] 7 - small impeller, 10 - large impeller, 10 - rear sensor. Detailed Embodiment

[0026] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0027] Embodiment 1

[0028] A hot - sleeving device for shaft - system punching sheets. This tooling includes a magnetic - isolation ring 1, a punching - sheet positioning block 2, punching sheets 3, and a clearance ring 4. The inner holes of the magnetic - isolation ring 1 and the clearance ring 4 are of the same size and their centers are located on the same axis. The punching - sheet positioning block 2 is provided with a positioning hole 21. The outer surface of the magnetic - isolation ring 1 is matched with the inner surface of the positioning hole 21, and the inner - side end face of the magnetic - isolation ring 1 is in contact with the bottom surface of the positioning hole 21. A plurality of punching sheets 3 are stacked and distributed along the axial direction and the outer surface of the punching sheets 3 is matched with the inner surface of the positioning hole 21. The end face of the innermost punching sheet 3 is in contact with the outer - side end face of the magnetic - isolation ring 1. The clearance ring 4 is detachably connected to the punching - sheet positioning block 2. The clearance ring 4 is provided with a clearance - ring positioning surface 41. The clearance - ring positioning surface 41 is matched with the inner surface of the positioning hole 21, and the inner - side face of the clearance ring 4 is in contact with the end face of the outermost punching sheet 3.

[0029] When hot - sleeving the punching sheets: 1) Place the magnetic - isolation ring 1 in the positioning hole 21 and make the inner - side end face of the magnetic - isolation ring 1 in contact with the bottom surface of the positioning hole 21; 2) Stack a set number of punching sheets 3 on top of each other and place them in the positioning hole 21, and make the end face of the innermost punching sheet 3 in contact with the outer - side end face of the magnetic - isolation ring 1; 3) Positioning and feeding of the clearance ring: Match the clearance - ring positioning surface 41 with the inner surface of the positioning hole 21 and make the inner - side face of the clearance ring 4 in contact with the end face of the outermost punching sheet 3; 4) Connect and lock the clearance ring 4 to the punching - sheet positioning block 2 to press a plurality of punching sheets 3 against each other; 5) Simultaneously machine the inner holes of the punching sheets for the locked - up plurality of punching sheets 3; 6) After heating the entire device, hot - sleeve the magnetic - isolation ring 1, punching sheets 3, and clearance ring 4 onto the shaft system, and make the outer - side end face of the clearance ring 4 tightly pressed and in contact with the corresponding end face of the thrust disk; after the hot - sleeving cools down, the magnetic - isolation ring 1, punching sheets 3, and clearance ring 4 shrink and are fixed on the shaft system; 7) Remove the excess materials of the punching - sheet positioning block 2 and the clearance ring 4 and the allowance of the punching sheets 3 to the set size to complete the installation process of the shaft - system punching sheets.

[0030] In this way, only the machining dimensions of the magnetic isolation ring 1, the punching sheet positioning block 2, and the spacer ring 4 need to be ensured, so as to effectively ensure the overall thickness after the punching sheets are stacked, and thus ensure the axial position of the stacked punching sheets on the shafting. At the same time, after the punching sheets are stacked and locked at the positioning holes 21, holes are punched in all the stacked punching sheets simultaneously, which ensures the concentricity of the inner holes of multiple punching sheets and also avoids the situation of punching each punching sheet first and then stacking them; punching the holes simultaneously after the punching sheets are stacked also does not require adjusting and detecting the inner holes of the punching sheets every time the punching sheets are stacked, improving the stacking efficiency of the punching sheets and making the processing and installation relatively more convenient. Moreover, after parts such as the punching sheet 3 are hot-fitted to the shafting, the redundant materials of the punching sheet positioning block 2 and the spacer ring 4 and the allowance of the punching sheet 3 are removed simultaneously, making the outer circle end face dimensions of multiple punching sheets 3 the same and improving the concentricity between the outer circle end faces of multiple punching sheets. And the dimensions can be measured before hot-fitting, checking for errors and adjusting the number of punching sheets 3 at any time, reducing the rejection rate of parts.

[0031] A bottom hole 22 is provided on the bottom surface of the punching sheet positioning block 2, and the diameter of the bottom hole 22 is larger than the inner hole diameter of the magnetic isolation ring 1 and smaller than the outer end face diameter of the magnetic isolation ring 1. The center of the bottom hole 22 and the center of the inner hole of the magnetic isolation ring 1 are located on the same axis.

[0032] The punching sheet positioning block 2 is provided with a fixing boss 23, and the spacer ring 4 is provided with a connecting boss 42; the fixing boss 23 and the connecting boss 42 are connected, and the outer end face of the fixing boss 23 does not contact the inner end face of the connecting boss 42 so that the spacer ring 4 is only positioned by the positioning hole 21, avoiding interference from the outer end face of the fixing boss 23.

[0033] The fixing boss 23 and the connecting boss 42 are connected by screws or bolts. A plurality of fixing holes of the fixing boss 23 and the connecting boss 42 are distributed along the circumferential direction and are aligned with each other.

[0034] In addition, the present invention also discloses a method for installing punching sheets on a shafting. This method uses a hot-fitting device for punching sheets on a shafting, and this method includes the following steps:

[0035] (S1) Magnetic isolation ring loading and positioning: Place the magnetic isolation ring 1 in the positioning hole 21 and make the inner end face of the magnetic isolation ring 1 contact the bottom surface of the positioning hole 21;

[0036] (S2) Punching sheet loading and positioning: Stack a set number of punching sheets 3 on top of each other and place them in the positioning hole 21, and make the end face of the innermost punching sheet 3 contact the outer end face of the magnetic isolation ring 1;

[0037] (S3) Spacer ring loading and positioning: Fit the positioning surface 41 of the spacer ring to the inner surface of the positioning hole 21, and make the inner side face of the spacer ring 4 contact the end face of the outermost punching sheet 3;

[0038] (S4)Lock the clearance ring: Connect and lock the clearance ring 4 with the punching sheet positioning block 2, and then press multiple punching sheets 3 against each other;

[0039] (S5)Machine the inner holes of the punching sheets: Simultaneously machine the inner holes of multiple locked punching sheets 3;

[0040] (S6)Thermal shrink fit: After heating the entire device, thermally shrink fit the magnetic isolation ring 1, the punching sheets 3, and the clearance ring 4 onto the shafting, and press the outer end face of the clearance ring 4 against the corresponding end face of the thrust disk; after the thermal shrink fit cools down, the magnetic isolation ring 1, the punching sheets 3, and the clearance ring 4 are shrunk and fixed on the shafting;

[0041] (S7)Remove the excess material: Remove the excess material of the punching sheet positioning block 2 and the clearance ring 4 and the allowance of the punching sheet 3 to the set size to complete the installation process of the shafting punching sheets.

[0042] When removing the excess material of the punching sheet positioning block 2 and the clearance ring 4, first turn the excess material, and then grind the outer circle of the turned surface.

[0043] In addition, the present invention also discloses a magnetic levitation blower, which includes a magnetic isolation ring 1, multiple superposed and fitted punching sheets 3, a clearance ring 4, a motor shaft 11, a thrust disk 12, and an axial sensor 9; the inner holes of the thrust disk 12, the magnetic isolation ring 1, the punching sheets 3, and the clearance ring 4 respectively cooperate with the outer surface of the same shaft segment of the motor shaft 11; the thrust disk 12, the clearance ring 4, multiple superposed and fitted punching sheets 3, and the magnetic isolation ring 1 are linearly adjacent to each other in sequence along the axial direction of the motor shaft 11, and the axial side end face of the thrust disk 12 is in contact with the corresponding shaft shoulder of the motor shaft 11; the magnetic isolation ring 1, the punching sheets 3, and the clearance ring 4 are installed on the motor shaft 11 by the above method; the output end of the axial sensor 9 is connected to the position where the punching sheet 3 is located. The blower is also provided with a speed sensor 8, and the output end of the speed sensor 8 is connected to the motor shaft 11.

Claims

1. A method for installing shaft punching sheets, characterized in that The method adopts a hot sleeve device for shaft punching sheets. The device includes a magnetic isolation ring (1), a punching sheet positioning block (2), punching sheets (3), and a clearance ring (4). The inner holes of the magnetic isolation ring (1) and the clearance ring (4) are of the same size and their centers are located on the same axis. The punching sheet positioning block (2) is provided with a positioning hole (21). The outer surface of the magnetic isolation ring (1) is matched with the inner surface of the positioning hole (21), and the inner end face of the magnetic isolation ring (1) is in contact with the bottom surface of the positioning hole (21). A plurality of punching sheets (3) are stacked and distributed axially in contact with each other, and the outer surface of the punching sheet (3) is matched with the inner surface of the positioning hole (21). The end face of the innermost punching sheet (3) is in contact with the outer end face of the magnetic isolation ring (1). The clearance ring (4) is detachably connected to the punching sheet positioning block (2). The clearance ring (4) is provided with a clearance ring positioning surface (41). The clearance ring positioning surface (41) is matched with the inner surface of the positioning hole (21), and the inner side face of the clearance ring (4) is in contact with the end face of the outermost punching sheet (3). The method includes the following steps: (S1) Loading and positioning of the magnetic isolation ring: Place the magnetic isolation ring (1) in the positioning hole (21) and the inner end face of the magnetic isolation ring (1) is in contact with the bottom surface of the positioning hole (21); (S2) Loading and positioning of the punching sheets: Stack and place a set number of punching sheets (3) in contact with each other into the positioning hole (21), and the end face of the innermost punching sheet (3) is in contact with the outer end face of the magnetic isolation ring (1); (S3) Loading and positioning of the clearance ring: Match the clearance ring positioning surface (41) with the inner surface of the positioning hole (21), and the inner side face of the clearance ring (4) is in contact with the end face of the outermost punching sheet (3); (S4) Locking of the clearance ring: Connect and lock the clearance ring (4) with the punching sheet positioning block (2) to press a plurality of punching sheets (3) against each other; (S5) Machining the inner holes of the punching sheets: Simultaneously machine the inner holes of the locked plurality of punching sheets (3); (S6) Hot sleeving: After heating the entire device, hot sleeve the magnetic isolation ring (1), the punching sheets (3), and the clearance ring (4) onto the shaft system, and the outer end face of the clearance ring (4) is tightly pressed and in contact with the corresponding end face of the thrust disc; after the hot sleeving cools down, the magnetic isolation ring (1), the punching sheets (3), and the clearance ring (4) shrink and are fixed on the shaft system; (S7) Removing excess material: Remove the excess material of the punching sheet positioning block (2) and the clearance ring (4) and the allowance of the punching sheets (3) to the set size to complete the installation process of the shaft punching sheets.

2. The method for installing a lamination of a shafting according to claim 1, wherein, The bottom surface of the punching sheet positioning block (2) is provided with a bottom hole (22). The diameter of the bottom hole (22) is larger than the inner hole diameter of the magnetic isolation ring (1) and smaller than the outer end face diameter of the magnetic isolation ring (1).

3. The method for installing a shaft system punching sheet according to claim 1, characterized in that, The center of the bottom hole (22) and the center of the inner hole of the magnetic isolation ring (1) are located on the same axis.

4. The method for installing a shaft system punching sheet according to claim 1, wherein, The punching sheet positioning block (2) is provided with a fixing boss (23), and the clearance ring (4) is provided with a connecting boss (42); the fixing boss (23) and the connecting boss (42) are connected, and the outer end face of the fixing boss (23) is not in contact with the inner end face of the connecting boss (42).

5. The method for installing shaft punching sheets according to claim 4, characterized in that, The fixing boss (23) and the connecting boss (42) are connected by screws or bolts.

6. The method for installing shaft punching sheets according to claim 1, wherein A plurality of fixing holes of the fixing boss (23) and the connecting boss (42) are distributed along the circumferential direction and are aligned with each other.

7. The method for installing shaft punching sheets according to claim 1, characterized in that, When removing the excess material of the punching sheet positioning block (2) and the spacer ring (4), first turn the excess material, and then grind the outer circle of the turned surface.

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