CN111482767A - Manufacturing method of high-speed rotor - Google Patents

Abstract

A manufacturing method of a high-speed rotor comprises a first shaft and a second shaft; the shaft comprises a first inner hole and a second inner hole with different apertures; the shaft II comprises a first shaft section and a second shaft section with different diameters; one end of the first shaft section of the second shaft penetrates through the second inner hole of the first shaft and is fixedly connected with one end of the first shaft. The manufacturing method comprises the following steps: respectively processing the first shaft and the second shaft to preset sizes; assembling and welding the first shaft and the second shaft to form a rotor; performing surface treatment on the assembled rotor and then performing finish machining to ensure that the roughness of the rotor surface is Ra0.05-0.2 and the coaxiality is 0.001-0.03 mm; finally, dynamic balance is carried out, and the dynamic balance grade reaches G0.4-2.5. The method can manufacture the high-speed rotor with high precision and high yield, and realizes full-automatic production.

Description

A method of manufacturing a high-speed rotor

technical field

The invention relates to the field of high-speed rotating shaft processing and testing, in particular to the field of mass production, processing and testing of special slender rotors for gas turbine or micro gas turbine generator rotors, electric turbochargers, ultra-high-speed generators, etc., in particular to the manufacture of a high-speed rotor method.

Background technique

Usually high-speed rotors need to be used with non-contact bearings or high-precision ball bearings, so the default application premise of high-speed rotors is high-precision rotors. In the high-speed rotor, the production and quality inspection and consistency control of the high-speed shaft and the high-speed disc have always been difficult, and it is also the main technical obstacle for the large-scale mass production of products using the high-speed shaft. Especially when it comes to high-speed two-segment shafts and three-segment shafts that need to be assembled with motor magnetic cores. Due to the high precision requirements, high assembly difficulty and low yield of high-speed shafts, the production cost of common processes is very high, among which waste materials and labor hours are the main costs. The accuracy requirements include but are not limited to surface finish (especially in the case of using air bearings), surface hardening treatment, shrink-fit verticality of the disc, and shaft coaxiality (especially the coaxiality of two-section and three-section shafts) , The machining and precision assembly of the disc, the thermal stress of the shrink-fit process, the residual internal stress in the machining process, the dynamic balance accuracy, etc.

Usually, one shaft is processed on the tooling at one time, and its accuracy is relatively good. However, once it involves repeated clamping and assembly, it is easy to exceed tolerances, especially when it comes to application scenarios with thermal stress and internal stress. Usually, the verticality of the disc workpiece will be offset by about 0.1-1° during the process of shrinking the shaft after the processing is completed; the two-stage finishing shafts are heat treated by friction welding or ordinary welding, and their coaxiality will be offset by 1. ‰-1%, if it is a three-stage shaft, the tolerances will accumulate in turn; the accumulated thermal stress during the shrink-fit process will have an adverse effect of about 1% on the verticality, coaxiality, including axial positioning and other factors after the workpiece is cooled. ; In addition, the effect of welding and assembly on the amount of unbalance inside the rotor can limit the accuracy of the dynamic balance. Ordinary finishes, especially repeated clamping processes will add up to tolerances.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a manufacturing method for a high-speed rotor, so as to achieve high efficiency, low cost and mass production of the high-speed rotor and implement effective detection.

The technical solution of the present invention is: a manufacturing method of a high-speed rotor, the high-speed rotor includes a first shaft and a second shaft; the first shaft includes a first inner hole and a second inner hole with different diameters, and the diameter of the first inner hole is smaller than The diameter of the second inner hole, the outer circumference corresponding to the first inner hole is provided with a first bearing position; the second shaft includes a first shaft section and a second shaft section with different diameters, and the diameter of the first shaft section is larger than that of the second shaft section. diameter; the first shaft section of the second shaft is provided with an inner hole; one end of the first shaft section of the shaft two passes through the second inner hole of the shaft one and is fixedly connected with one end of the shaft one, and the first shaft section of the shaft two is not inserted into the first shaft. The outer circumference of the second inner hole is provided with a second bearing position; the rotating speed of the high-speed rotor is 150000rpm-160000rpm;

The manufacturing method includes the following steps:

S100, respectively process the first axis and the second axis to a predetermined size;

S200, assembly, welding:

Insert the first shaft segment of the second shaft into the second inner hole of the shaft one, and weld the mating surfaces of the first and second shafts;

S300, surface treatment:

The surface treatment time is 1-60 seconds, and the online microwave surface treatment is completed to release the thermal stress. After the rotor is cooled to room temperature and the stress is relieved, a rough piece is obtained;

S400, finishing: finishing to the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm;

S500, dynamic balance:

Place the finished rotor in the dynamic balancing equipment, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, the amount of the non-working surface of the rotor is removed to remove the unbalanced amount, so that The dynamic balance level reaches G0.4-2.5.

Further, the step S100 respectively processes the first axis and the second axis to a predetermined size:

The steps of machining axis one include:

SA110. Roughly machine the outer circle after destressing the bar used for machining the first shaft, and leave a margin for the first bearing position, and the margin meets the requirements of subsequent combined processing;

SA120. Finish machining other outer circles except the first bearing position to size; under tooling aids, use a boring machine to finish machining the inner holes on both sides of the shaft to size; finish machining the assembly end faces at both ends to size;

SA130, single-piece dynamic balance, the first shaft is dynamically balanced, the dynamic balance position is taken at the second inner hole, the speed of the dynamic balance is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0. 4-2.5;

The steps of machining shaft two (2) include:

SB110. Roughly machine the outer circle after destressing the bar used for machining the second shaft, and leave a margin for the second bearing, which meets the requirements of subsequent combined processing;

SB120, finish machining other outer circles except the second bearing position to size; machining inner hole to size; finish machining both end faces of assembly to size;

SB130, finishing welding surface to size;

SB140, single-piece dynamic balance, the two shafts are dynamically balanced, the dynamic balance position is taken from the inner hole, the speed of the dynamic balance is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5 ;

and / or

The step of finishing step S400 includes:

S410. Clamping: use the outer circle corresponding to the second inner hole of the shaft as the clamping reference surface for positioning and clamping, to ensure that the coaxiality between the clamping reference plane of the entire rotor and the first inner hole of the shaft is kept at 0.001-0.03mm ;

S420. High-frequency wave finishing: Based on the clamping reference plane, use the high-frequency wave surface treatment process to finish the part with a distortion exceeding 0.1mm and a margin exceeding 0.05mm. During the high-frequency wave finishing process, leave the allowance, the remainder The amount can meet the requirements of subsequent combined processing; the removal part includes the first bearing position, the second bearing position and the welding position; the frequency of the high frequency wave is 0.1-1MHz;

S430, hardening treatment: hardening the entire rotor;

S440, finishing: finishing the second shaft segment of the second shaft to the size;

S450. Overall finishing: use the finishing process to remove the allowance to size at one time, so that the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm.

Further, the high-speed rotor further includes a motor magnetic core, which is installed in the second inner hole of the shaft 1, and one end of the first shaft segment of the shaft 2 passes through the second inner hole of the shaft 1 and abuts the motor magnetic core;

The step S100 respectively processes the first axis and the second axis to a predetermined size:

The steps of machining axis one include:

SA110. Roughly machine the outer circle after destressing the bar used for machining the first shaft, and leave a margin for the first bearing position, and the margin meets the requirements of subsequent combined processing;

SA120. Finish machining other outer circles except the first bearing position to size; under tooling aids, use a boring machine to finish machining the inner holes on both sides of the shaft to size; finish machining the assembly end faces at both ends to size;

SA130, single-piece dynamic balance, the first shaft is dynamically balanced, the dynamic balance position is taken at the second inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4 -2.5;

The steps of machining axis two include:

SB110. Roughly machine the outer circle after destressing the bar used for machining the second shaft, and leave a margin for the second bearing, which meets the requirements of subsequent combined processing;

SB120, finish machining other outer circles except the second bearing position to size; machining inner hole to size; finish machining both end faces of assembly to size;

SB130, finishing welding surface to size;

SB140, single-piece dynamic balance, the second shaft is dynamically balanced, the dynamic balance position is taken from the inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5;

and / or

The steps of assembling and welding in the step S200 include:

S210, inserting the finished motor magnetic core into the second inner hole of the first shaft by interference heat; inserting the first shaft segment of the second shaft into the second inner hole and abutting the motor magnetic core;

S220. Weld the mating surfaces of the first axis and the second axis by welding;

and / or

The step of finishing step S400 includes:

S410. Clamping: use the outer circle corresponding to the magnetic core of the motor as the clamping reference plane for positioning and clamping, to ensure that the coaxiality between the clamping reference plane of the entire rotor and the inner hole on the right side of the shaft is maintained at 0.001-0.03mm;

S420. High-frequency wave finishing: Based on the clamping reference plane, use the high-frequency wave surface treatment process to finish the part with a distortion exceeding 0.1mm and a margin exceeding 0.05mm. During the high-frequency wave finishing process, leave the allowance, the remainder The amount can meet the requirements of subsequent combined processing; the removal part includes the first bearing position, the second bearing position and the welding position; the frequency of the high frequency wave is 0.1-1MHz;

S430, hardening treatment: hardening the entire rotor;

S440, finishing: finishing the second shaft segment of the second shaft to the size;

S450. Overall finishing: use the finishing process to remove the allowance to size at one time, so that the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm.

Further, the high-speed rotor further includes a thrust plate, which is fixedly sleeved on one end side of the outer circle corresponding to the second inner hole of the shaft;

The step S100 also includes processing the thrust disc to a predetermined size, including the following steps:

SC110. Rough machining after destressing the blank used for machining the thrust disc;

SC120. Finish machining the inner hole of the thrust plate to the size, the surface roughness of the inner hole after finishing is Ra0.2-Ra0.4, and leave a margin on the end face of the thrust plate, which meets the requirements of subsequent combined processing;

SC130, single-piece dynamic balance, perform dynamic balance on the thrust disc, the dynamic balance position is taken from the outer circumferential surface of the thrust disc, the rotational speed of the dynamic balance is lower than the first-order critical rotational speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5;

The steps of assembling and welding in the step S200 include:

S210. Insert the first shaft segment of the shaft 2 into the second inner hole of the shaft 1; sleeve the thrust plate on one end of the outer circle corresponding to the second inner hole of the shaft 1 by means of interference shrink fit, The end side of the thrust plate is aligned with the end side of the outer circle corresponding to the second inner hole of the shaft;

S220. Using welding process, respectively weld the mating surfaces of the thrust disk and the shaft 1, and the mating surfaces of the shaft 1 and the shaft 2 on the aligned side of one end of the thrust disk and the shaft;

In the step S420, the removed parts include the first bearing position, the second bearing position, the welding position and the end face of the thrust plate;

The step S450 further includes making the perpendicularity between the thrust plate and the shaft 1 to be 0.001-0.03 mm.

Further, the high-speed rotor further includes a thrust plate, which is fixedly sleeved on one end side of the outer circle corresponding to the second inner hole of the shaft;

The step S100 also includes processing the thrust disc to a predetermined size, including the following steps:

SC110. Rough machining after destressing the blank used for machining the thrust disc;

SC120. Finish machining the inner hole of the thrust plate to the size, the surface roughness of the inner hole after finishing is Ra0.2-Ra0.4, and leave a margin on the end face of the thrust plate, which meets the requirements of subsequent combined processing;

SC130, single-piece dynamic balance, perform dynamic balance on the thrust plate, the dynamic balance position is taken from the outer circumferential surface of the thrust plate, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0 .4-2.5;

The steps of assembling and welding in the step S200 include:

S210. Insert the finished motor magnetic core into the second inner hole of the first shaft by interference heat; insert the first shaft segment of the second shaft into the second inner hole of the first shaft to abut the motor magnetic core; The thrust plate is sleeved on one end of the outer circle corresponding to the second inner hole of the shaft by means of interference shrinkage, and the end side of the thrust plate is connected to the outer circle corresponding to the second inner hole of the shaft. side-to-side alignment;

S220. Using welding process, respectively weld the mating surfaces of the thrust disk and the shaft 1, and the mating surfaces of the shaft 1 and the shaft 2 on the aligned side of one end of the thrust disk and the shaft;

In the step S420, the removed parts include the first bearing position, the second bearing position, the welding position and the end face of the thrust plate;

The step S450 also includes making the perpendicularity between the thrust plate and the shaft 1 to be 0.001-0.03 mm.

Further, the high-speed rotor also includes a compressor, a turbine and a lock nut, and the compressor and the turbine are sequentially fixed and sleeved on the second shaft section of the second shaft and fastened by the lock nut;

The step S500 dynamic balancing includes the following steps:

S510. Place the rotor after step S400 in a dynamic balancing device, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, remove the amount of the non-working surface of the rotor to remove the unbalanced amount , so that the dynamic balance level reaches G0.4-2.5;

S520. Fix the single piece of dynamically balanced compressor, turbine and lock nut on the second shaft in turn, and tighten them with a torque wrench; the single piece of dynamically balanced compressor, turbine and lock nut are dynamically balanced The grade reaches G0.4-2.5;

S530. Use a motor or an air blower to drive the rotor to rotate, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, so that the The dynamic balance level reaches G0.4-2.5.

Further, the step S530 includes:

S531. Use a motor or an air blower to drive the rotor to speed up to 8000-12000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5;

S532. Use a motor or an air blower to drive the rotor to speed up to 20000-25000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5;

S533. Use a motor or an air blower to drive the rotor to speed up to 25000-60000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5;

S534. Use a motor or an air blower to drive the rotor to speed up to 120000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5;

S535. Use a motor or an air blower to drive the rotor up to full speed and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5.

Further, the step S440 uses a grinding process for finishing.

Further, in the step S450, the grinding process adopts a special grinding wheel mold, and the special grinding wheel mold is provided with an inner cavity, and the shape and size of the inner wall of the inner cavity are the same as the design shape and size of the rotor, and the rotor is placed in the place. The special grinding wheel mold is finely ground to the rotor size.

Further, after all finishing steps in steps S100-400, the rotor size is checked.

Further, the dynamic balance level is selected as G1.

Further, the amount of removing the non-working surface of the rotor in the step S500 adopts automatic laser rust removal or a non-contact process of 0.1-1 GHz high frequency wave.

Further, when a motor magnetic core is provided, in step S500, a motor is used to drive the rotor to rotate to perform a dynamic balance test, and the stator of the motor is non-contactly sleeved at the outer circle corresponding to the motor magnetic core, and the motor The magnetic core acts as the rotor of the motor.

Further, in the dynamic balancing equipment, the motors and/or bearings used are the original matched motors and/or bearings when the high-speed rotor is working.

Further, the bearing is an air bearing.

Further, the non-working surface includes the first inner hole of the first shaft and the boss of the thrust plate.

Further, when the rotor is driven to rotate by air blowing, the gas supply component blows the turbine to drive the rotor to rotate.

Further, the non-working surface of the rotor includes the first inner hole of the first shaft, the boss of the thrust plate, the locking nut and the part of the second shaft passing through the locking nut.

Further, a spacer ring for axial positioning is provided between the compressor and the turbine, and the compressor, spacer ring, turbine, and lock nut are sequentially fixed and sleeved on the second shaft, and are tightened with a torque wrench; The dynamic balance level of the compressor, spacer ring, turbine and lock nut that are dynamically balanced by one piece reaches G0.4-2.5.

Further, the dynamic balance level is selected as G1.

The advantages of the present invention compared with the prior art are:

1. The high-speed rotor manufacturing method of the present invention combines special processes such as rough machining, welding, shrink fit, heat treatment, finishing, surface treatment, tooling, measurement, and clamping control in a specific manner, sequence, and process requirements. Achieve high-precision and high-yield production.

2. By adopting the high-speed rotor manufacturing method of the present invention, the yield of industrialized mass production can be realized, while the yield of conventional high-speed rotor production usually does not exceed 2/3.

3. The high-speed rotor manufacturing method of the present invention has compact production links and improves efficiency.

4. The high-speed rotor manufacturing method of the present invention has high reliability and can definitely obtain workpieces that meet technical requirements.

5. The production cost of the high-speed rotor manufacturing method of the present invention is lower than that of the traditional method.

6. The high-speed rotor manufacturing method of the present invention greatly reduces the precision requirements of the equipment.

7. The high-speed rotor manufacturing method of the present invention has a very high degree of automation, which can reach 100%.

Description of drawings

1 is a schematic structural diagram of a high-speed rotor according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a high-speed rotor according to Embodiment 2 of the present invention;

3 is a schematic structural diagram of a high-speed rotor according to Embodiment 3 of the present invention;

4 is a schematic structural diagram of a high-speed rotor according to Embodiment 4 of the present invention;

5 is a schematic structural diagram of a high-speed rotor according to Embodiment 5 of the present invention;

6 is a schematic structural diagram of a high-speed rotor according to Embodiment 6 of the present invention;

7 is a schematic structural diagram of a high-speed rotor according to Embodiment 7 of the present invention;

8 is a schematic structural diagram of a high-speed rotor according to Embodiment 8 of the present invention;

Fig. 9 is the structural representation of shaft one of the present invention;

Fig. 10 is the structural representation of the shaft two of the present invention;

Fig. 11 is the structural representation of the thrust plate of the present invention;

12 is a schematic diagram of the assembly structure corresponding to Embodiments 1 and 3 of the present invention;

13 is a schematic diagram of the assembly structure corresponding to Embodiments 2 and 4 of the present invention;

14 is a schematic diagram of the assembly structure corresponding to Embodiments 5 and 7 of the present invention;

15 is a schematic diagram of the assembly structure corresponding to Embodiments 6 and 8 of the present invention;

16 is a schematic diagram of the clamping structure corresponding to Embodiments 1 and 3 of the present invention;

17 is a schematic diagram of the clamping structure corresponding to Embodiments 2 and 4 of the present invention;

18 is a schematic diagram of the clamping structure corresponding to Embodiments 5 and 7 of the present invention;

19 is a schematic diagram of the clamping structure corresponding to Embodiments 6 and 8 of the present invention.

Reference number:

1: Shaft 1; 2: Shaft 2; 3: Compressor; 4: Turbine; 5: Lock nut; 6: Motor core; 7: Thrust plate; 8: First bearing position; 9: Second bearing position; 10: Allowance; 11: Welding surface; 12: Clamping reference surface.

Detailed ways

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, features delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The present invention relates to the structural forms of the high-speed rotors of the eight embodiments. The rotational speed of the high-speed rotors ranges from 150,000 rpm to 160,000 rpm, preferably 155,000 rpm. The structural forms of the eight high-speed rotors are shown in Figures 1-8.

Example 1

The high-speed rotor structure of Embodiment 1 is shown in FIG. 1, including a shaft one 1 and a second shaft 2; the shaft one 1 includes a first inner hole and a second inner hole with different diameters, wherein the diameter of the first inner hole is smaller than that of the second inner hole. The diameter of the inner hole, the outer circumference corresponding to the first inner hole is provided with a first bearing position 8; the second shaft 2 includes a first shaft section and a second shaft section with different diameters, and the diameter of the first shaft section is larger than Diameter; one end of the first shaft segment of shaft two 2 passes through the second inner hole of shaft one 1 and is fixedly connected with one end of shaft one 1, and the outer circumference of the part where the first shaft segment of shaft two 2 is not inserted into the second inner hole is provided with a The second bearing position 9 .

Preferably, the first shaft segment of the second shaft 2 is provided with an inner hole to achieve light weight.

Preferably, the outer diameter of the part of the first shaft segment of the shaft 2 2 inserted into one end of the second inner hole of the shaft 1 1 is larger than the outer diameter of the second bearing portion 9 not inserted into the outer circumference of the second inner hole of the shaft 1 1 .

Example 2

The structure of the high-speed rotor of Embodiment 2 is shown in FIG. 2 . The motor magnetic core 6 is fixedly installed in the second inner hole of the shaft 1 of the high-speed rotor, and one end of the first shaft section of the shaft 2 passes through the second inner hole of the shaft 1 1. The hole is in contact with the magnetic core 6 of the motor, and other structures are the same as those in the first embodiment, and are not repeated here.

Example 3

The high-speed rotor structure of Embodiment 3 is shown in FIG. 3. On the basis of the structure of the high-speed rotor of Embodiment 1, it also includes a compressor 3, a turbine 4 and a lock nut 5. The compressor 3 and the turbine 4 are sequentially fixed and sleeved on the The second shaft segment of the second shaft 2 is fastened by the lock nut 5 .

Preferably, a spacer ring (not shown in the figure) is arranged between the compressor 3 and the turbine 4 to enhance the rigidity of the rotor.

Example 4

The high-speed rotor structure of Embodiment 4 is shown in FIG. 4 . The motor magnetic core 6 is fixedly installed in the second inner hole of the shaft 1 of the high-speed rotor, and one end of the first shaft section of the shaft 2 2 passes through the second inner hole of the shaft 1 1. The hole is in contact with the magnetic core 6 of the motor, and other structures are the same as those in Embodiment 3, and are not repeated here.

Example 5

The structure of the high-speed rotor of Embodiment 5 is shown in FIG. 5. On the basis of the structure of the high-speed rotor of Embodiment 1, it also includes a thrust plate 7, which is fixedly sleeved at one end of the outer circle corresponding to the second inner hole of the shaft-1. side. The socketed position of the thrust plate 7 corresponds to the position where the first shaft segment of the shaft two 2 is inserted into the second inner hole of the shaft one 1 .

Example 6

The high-speed rotor structure of Embodiment 6 is shown in FIG. 6 . The motor magnetic core 6 is fixedly installed in the second inner hole of the shaft 1 of the high-speed rotor, and one end of the first shaft section of the shaft 2 passes through the second inner hole of the shaft 1 1. The hole is in contact with the magnetic core 6 of the motor, and other structures are the same as those in Embodiment 5, and are not repeated here.

Example 7

The high-speed rotor structure of Embodiment 7 is shown in FIG. 7 . On the basis of the structure of the high-speed rotor of Embodiment 5, it also includes a compressor 3, a turbine 4 and a lock nut 5. The compressor 3 and the turbine 4 are sequentially fixed and sleeved on the The second shaft segment of the second shaft 2 is fastened by the lock nut 5 .

Preferably, a spacer ring (not shown in the figure) is arranged between the compressor 3 and the turbine 4 to enhance the rigidity of the rotor.

Example 8

The structure of the high-speed rotor of the embodiment 8 is shown in FIG. 8 . The motor magnetic core 6 is fixedly installed in the second inner hole of the shaft 1 of the high-speed rotor, and one end of the first shaft section of the shaft 2 passes through the second inner hole of the shaft 1 1. The hole is in contact with the magnetic core 6 of the motor, and other structures are the same as those in Embodiment 7, and will not be repeated here.

The invention provides a method for processing the above high-speed rotor, which specifically includes the following steps:

S100, the first axis 1 and the second axis 2 are processed respectively.

As shown in FIG. 9 , which is a schematic structural diagram of the shaft one 1, the processing method of the shaft one 1 includes the following steps:

SA110. Roughly machine the outer circle after destressing the bar used for machining the shaft 1, and leave a margin for the first bearing position 8, and the margin meets the requirements of subsequent combined processing;

SA120. Finish other outer circles except the first bearing position 8 to the size; under the tooling aids, use the boring machine to finish the inner holes on both sides of the shaft 1 to the size; finish the assembly end faces at both ends to the size;

SA130, single-piece dynamic balance, perform dynamic balance on the shaft one 1, the dynamic balance position is taken at the second inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5, preferably G1.

As shown in FIG. 10 , which is a schematic structural diagram of the second shaft 2, the processing method of the second shaft 2 includes the following steps:

SB110. Roughly machine the outer circle after destressing the bar material used for machining the shaft 22, and leave a margin for the second bearing position 9, and the margin meets the requirements of subsequent combined processing;

SB120. Finish machining other outer circles except the second bearing position 9 to size; machine inner hole to size; finish machining both end faces of assembly to size;

SB130, finishing welding surface 11 to size;

SB140, single-piece dynamic balance, the shaft 22 is dynamically balanced, the dynamic balance position is taken from the inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4 -2.5, preferably G1.

Further, the step S100 further includes processing the thrust plate 7 .

As shown in FIG. 11 , which is a schematic structural diagram of a thrust disc, the processing method of the thrust disc includes the following steps:

SC110. Rough machining after destressing the blank used for machining the thrust plate 7;

SC120. Finish machining the inner hole to the size, the surface roughness of the inner hole after finishing is Ra0.2-Ra0.4, and the end face of the thrust plate is left with a margin of 10 (Fig. 15), and the margin meets the subsequent combination processing needs;

SC130, single-piece dynamic balance, perform dynamic balance on the thrust plate 7, the dynamic balance position is taken from the outer circumferential surface of the thrust plate, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5, preferably G1.

S200, assembly, welding. Specifically, it includes the following steps:

S210, inserting the finished motor magnetic core 6 into the second inner hole by interference heat; inserting the first shaft segment of the second shaft 2 into the second inner hole and abutting the motor magnetic core 6; The thrust plate 7 is sleeved on one end side of the outer circle corresponding to the second inner hole of the shaft one 1 by means of interference shrinkage, and the end side of the thrust plate 7 corresponds to the second inner hole of the shaft one 1. The end sides of the outer circle are aligned;

S220, use a welding process, preferably laser welding, respectively weld the mating surfaces of the thrust disk 7 and the shaft 1, and the mating surfaces of the shaft 1 and the shaft 2 on the aligned sides of the thrust disk 7 and the shaft 1, as shown in FIG. 15. the welding surface 11.

Wherein, in step S200, the drawings corresponding to Embodiment 1 and Embodiment 3 refer to FIG. 12, the drawings corresponding to Embodiment 2 and Embodiment 4 refer to FIG. 13, and the drawings corresponding to Embodiment 5 and Embodiment 7 refer to FIG. 14 , the drawings corresponding to Embodiment 6 and Embodiment 8 refer to FIG. 15 .

S300, surface treatment

1-60 seconds, preferably 10 seconds, complete the online microwave surface treatment (no clamping tooling, no assembly line), release thermal stress, and after the rotor cools to room temperature to relieve stress, a rough piece is obtained.

S400, finishing

S410, clamping

The outer circle corresponding to the motor magnetic core 6 (the embodiment without the motor magnetic core 6 is based on the second inner hole of the shaft one 1) is used as the clamping reference surface 12 for positioning and clamping, so as to ensure that the clamping reference surface 12 of the entire rotor is connected to the shaft one 1. The coaxiality of the right inner hole is maintained at 0.001-0.03mm, preferably 0.02mm.

Wherein, in step S400, the drawings corresponding to Embodiment 1 and Embodiment 3 refer to FIG. 16, the drawings corresponding to Embodiment 2 and Embodiment 4 refer to FIG. 17, and the drawings corresponding to Embodiment 5 and Embodiment 7 refer to FIG. 18 , the drawings corresponding to Embodiment 6 and Embodiment 8 refer to FIG. 19 .

S420, high frequency wave finishing

The rotor shown in Figures 16-19 is a rotor with microscopic twists. At this moment, based on the clamping reference plane, use the high-frequency wave (0.1-1MHz) surface treatment process to process the part with a distortion degree exceeding 0.1mm and a margin exceeding 0.05mm. During the high-frequency wave finishing process, leave a margin, and the margin meets the requirements For the subsequent combined processing requirements, the above-mentioned removed parts are the first bearing position 8, the second bearing position 9, the welding position and the end face of the thrust plate 7, etc., thereby improving the machining accuracy and surface roughness of the entire rotor.

S430, hardening treatment

The entire rotor is hardened to improve the surface roughness and hardness and fatigue resistance of the entire rotor.

S440, finishing

The second shaft segment of the second shaft 2 is finished to size, preferably by a grinding process.

S450, overall finishing

Use the fine grinding process to remove the allowance to the size at one time, to ensure that the surface roughness of the rotor is Ra0.05-0.2, the coaxiality is 0.001-0.03mm, and the perpendicularity between the thrust plate 7 and the shaft 1 is 0.001-0.03mm.

Wherein, the fine grinding process adopts a special grinding wheel mold, and the special grinding wheel mold is provided with an inner cavity, and the shape and size of the inner wall of the inner cavity are the same as the designed shape and size of the rotor, and the rotor after step S440 is placed in the Inside the special grinding wheel mold (here, the rotor is aligned and clamped on the fine grinding tool, and then the whole is placed in the special grinding wheel mold), and the inner cavity of the special grinding wheel mold finely grinds the rotor to the size.

Preferably, in steps S100-400, in the finishing step, the size of each piece is inspected.

S500, dynamic balance

S510. Place the rotor after step S450 in a dynamic balancing device, and perform dynamic balancing based on the first bearing position 8 and/or the second bearing position 9. During the dynamic balancing process, remove the non-working surface of the rotor to achieve removal Unbalance amount, so that the dynamic balance level reaches G0.4-2.5 dynamic balance accuracy, preferably G1.

Preferably, the amount of removing the non-working surface of the rotor uses a non-contact process such as automatic laser rust removal or 0.1-1GHz high frequency wave.

Preferably, for the embodiment provided with the motor magnetic core 6, the motor is used to drive the rotor to rotate to carry out a dynamic balance test. The magnetic core 6 serves as the rotor of the motor.

Preferably, in the dynamic balancing device, the motor and/or bearing used are the original matching motor and/or bearing when the rotor is working. Further preferably, the bearing is an air bearing.

Preferably, the non-working surface includes but is not limited to the first inner hole of the shaft one 1 and the boss of the thrust plate 7 .

S520, the one-piece dynamically balanced compressor 3, turbine 4, and locking nut 5 are sequentially fixed and sleeved on the second shaft 2, and tightened with a torque wrench; the single-piece dynamically balanced compressor 3, turbine 4 , The dynamic balance level of the lock nut 5 reaches the dynamic balance accuracy of G0.4-2.5, preferably G1.

S530. Use a motor or an air blower to drive the rotor to rotate, and perform dynamic balancing based on the first bearing position 8 and/or the second bearing position 9. During the dynamic balancing process, remove the amount of the non-working surface of the rotor to remove the unbalanced amount , so that the dynamic balance level reaches G0.4-2.5 dynamic balance accuracy, preferably G1.

Preferably, when a motor is used to drive the rotor to rotate, the stator of the motor is non-contact sleeved on the outer circle corresponding to the motor magnetic core 6, and the motor magnetic core 6 is used as the rotor of the motor.

Preferably, when air blowing is used to drive the rotor to rotate, the gas supply component blows the turbine 4 to drive the rotor to rotate.

Preferably, the non-working surface of the rotor includes but is not limited to the first inner hole of shaft one 1, the boss of the thrust plate 7, the locking nut 5, and the part of the shaft two 2 passing through the locking nut 5.

Preferably, the amount of removing the non-working surface of the rotor uses a non-contact process such as automatic laser rust removal or 0.1-1GHz high frequency wave.

Preferably, the pneumatic driving components are a compressor 3 and a turbine 4. After the compressor 3 and the turbine 4 are installed on the rotor system from the right side, they are locked with a locking nut 5. Specifically as shown in Figure 5.

Preferably, a spacer ring (not shown in the figure) for axial positioning is provided between the compressor 3 and the turbine 4, and the compressor 3, the spacer ring, the turbine 4 and the lock nut 5 are sequentially fixed and sleeved on the On the second shaft 2, and tighten it with a torque wrench; the dynamic balance level of the single-piece dynamic balance of the compressor 3, spacer ring, turbine 4, and lock nut 5 reaches G0.4-2.5 dynamic balance accuracy, preferably G1 .

Preferably, in the dynamic balancing device, the motor and/or bearing used are the original matching motor and/or bearing when the rotor is working.

Preferably, a motor or an air blower is used to drive the rotor to rotate, and dynamic balance is performed based on the first bearing position 8 and/or the second bearing position 9. During the dynamic balancing process, the amount of the non-working surface of the rotor is removed to achieve unevenness removal. Measure to make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1, including the following steps:

S531. Use a motor or an air blower to drive the rotor to speed up to 8000-12000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1;

S532. Use a motor or an air blower to drive the rotor to speed up to 20000-25000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1;

S533. Use a motor or an air blower to drive the rotor to speed up to 25000-60000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1;

S534. Use a motor or an air blower to drive the rotor to speed up to 120000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1;

S535. Use a motor or an air blower to drive the rotor up to full speed and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5 dynamic balance accuracy, preferably G1.

To sum up, the present invention provides a method for manufacturing a high-speed rotor. The high-speed rotor includes a first shaft and a second shaft; the first shaft includes a first inner hole and a second inner hole with different diameters; the second shaft includes a second inner hole with different diameters. a shaft section and a second shaft section; one end of the first shaft section of the second shaft passes through the second inner hole of the first shaft and is fixedly connected with one end of the first shaft. The manufacturing method includes the following steps: respectively processing the first shaft and the second shaft to a predetermined size; assembling and welding the first shaft and the second shaft to form a rotor; and finishing the assembled rotor after surface treatment, so that the surface roughness of the rotor is Ra0.05 -0.2, the coaxiality is 0.001-0.03mm; the final dynamic balance makes the dynamic balance level reach G0.4~2.5. The method can manufacture high-speed rotors with high precision and high yield, and realize fully automated production.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (20)

1. a manufacturing method of a high-speed rotor, is characterized in that, described high-speed rotor comprises shaft 1 and shaft 2; Shaft 1 comprises the first inner hole and the second inner hole of different apertures, and the aperture of the first inner hole is smaller than the second inner hole. The diameter of the inner hole, the outer circumference corresponding to the first inner hole is provided with a first bearing position; the second shaft includes a first shaft section and a second shaft section with different diameters, and the diameter of the first shaft section is larger than the diameter of the second shaft section; The first shaft section of the second shaft is provided with an inner hole; one end of the first shaft section of the second shaft passes through the second inner hole of the shaft one and is fixedly connected with one end of the shaft one, and the first shaft section of the second shaft is not inserted into the second inner hole. The outer circumference of the hole is provided with a second bearing position; the rotating speed of the high-speed rotor is 150000rpm-160000rpm; The manufacturing method includes the following steps: S100, respectively process the first axis and the second axis to a predetermined size; S200, assembly, welding: Insert the first shaft segment of the second shaft into the second inner hole of the shaft one, and weld the mating surfaces of the first and second shafts; S300, surface treatment: The surface treatment time is 1-60 seconds, and the online microwave surface treatment is completed to release the thermal stress. After the rotor is cooled to room temperature and the stress is relieved, a rough piece is obtained; S400, finishing: finishing to the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm; S500, dynamic balance: Place the finished rotor in the dynamic balancing equipment, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, the amount of the non-working surface of the rotor is removed to remove the unbalanced amount, so that The dynamic balance level reaches G0.4-2.5. 2. The method for manufacturing a high-speed rotor according to claim 1, wherein The step S100 respectively processes the first axis and the second axis to a predetermined size: The steps of machining axis one include: SA110. Roughly machine the outer circle after destressing the bar used for machining the first shaft, and leave a margin for the first bearing position, and the margin meets the requirements of subsequent combined processing; SA120. Finish machining other outer circles except the first bearing position to size; under tooling aids, use a boring machine to finish machining the inner holes on both sides of the shaft to size; finish machining the assembly end faces at both ends to size; SA130, single-piece dynamic balance, the first shaft is dynamically balanced, the dynamic balance position is taken at the second inner hole, the speed of the dynamic balance is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0. 4-2.5; The steps of machining shaft two (2) include: SB110. Roughly machine the outer circle after destressing the bar used for machining the second shaft, and leave a margin for the second bearing, which meets the requirements of subsequent combined processing; SB120, finish machining other outer circles except the second bearing position to size; machining inner hole to size; finish machining both end faces of assembly to size; SB130, finishing welding surface to size; SB140, single-piece dynamic balance, the two shafts are dynamically balanced, the dynamic balance position is taken from the inner hole, the speed of the dynamic balance is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5 ; and / or The step of finishing step S400 includes: S410. Clamping: use the outer circle corresponding to the second inner hole of the shaft as the clamping reference surface for positioning and clamping, to ensure that the coaxiality between the clamping reference plane of the entire rotor and the first inner hole of the shaft is kept at 0.001-0.03mm ; S420, high-frequency wave finishing: based on the clamping reference plane, use the high-frequency wave surface treatment process to finish the part with the distortion exceeding 0.1mm and the allowance exceeding 0.05mm. During the high-frequency wave finishing process, leave the allowance. The amount can meet the requirements of subsequent combined processing; the removal part includes the first bearing position, the second bearing position and the welding position; the frequency of the high frequency wave is 0.1-1MHz; S430, hardening treatment: hardening the entire rotor; S440, finishing: finishing the second shaft segment of the second shaft to the size; S450, overall finishing: use the finishing process to remove the allowance to size at one time, so that the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm. 3 . The method for manufacturing a high-speed rotor according to claim 1 , further comprising a motor magnetic core, which is installed in the second inner hole of the first shaft, and one end of the first shaft section of the second shaft passes through the first shaft of the second shaft. 4 . The inner hole is in contact with the magnetic core of the motor; The step S100 respectively processes the first axis and the second axis to a predetermined size: The steps of machining axis one include: SA110. Roughly machine the outer circle after destressing the bar used for machining the first shaft, and leave a margin for the first bearing position, and the margin meets the requirements of subsequent combined processing; SA120. Finish other outer circles except the first bearing position to the size; under the tooling aids, use the boring machine to finish the inner holes on both sides of the shaft to the size; finish the assembly end faces at both ends to the size; SA130, single-piece dynamic balance, the first shaft is dynamically balanced, the dynamic balance position is taken at the second inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4 -2.5; The steps of machining axis two include: SB110. Roughly machine the outer circle after destressing the bar used for machining the second shaft, and leave a margin for the second bearing, which meets the requirements of subsequent combined processing; SB120. Finish machining other outer circles except the second bearing position to size; machining inner hole to size; finish machining both end faces of assembly to size; SB130, finishing welding surface to size; SB140, single-piece dynamic balance, the second shaft is dynamically balanced, the dynamic balance position is taken from the inner hole, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5; and / or The steps of assembling and welding in the step S200 include: S210, inserting the finished motor magnetic core into the second inner hole of the first shaft by interference heat; inserting the first shaft segment of the second shaft into the second inner hole and abutting the motor magnetic core; S220. Weld the mating surfaces of the first axis and the second axis by welding; and / or The step of finishing in step S400 includes: S410. Clamping: use the outer circle corresponding to the magnetic core of the motor as the clamping reference plane for positioning and clamping, to ensure that the coaxiality between the clamping reference plane of the entire rotor and the inner hole on the right side of the shaft is maintained at 0.001-0.03mm; S420. High-frequency wave finishing: Based on the clamping reference plane, use the high-frequency wave surface treatment process to finish the part with a distortion exceeding 0.1mm and a margin exceeding 0.05mm. During the high-frequency wave finishing process, leave the allowance, the remainder The amount can meet the requirements of subsequent combined processing; the removal part includes the first bearing position, the second bearing position and the welding position; the frequency of the high frequency wave is 0.1-1MHz; S430, hardening treatment: hardening the entire rotor; S440, finishing: finishing the second shaft segment of the second shaft to the size; S450. Overall finishing: use the finishing process to remove the allowance to size at one time, so that the surface roughness of the rotor is Ra0.05-0.2, and the coaxiality is 0.001-0.03mm. 4. The method for manufacturing a high-speed rotor according to claim 2, wherein the high-speed rotor further comprises a thrust plate, which is fixedly sleeved on one end side of the outer circle corresponding to the second inner hole of the shaft; The step S100 also includes processing the thrust disc to a predetermined size, including the following steps: SC110. Rough machining after destressing the blank used for machining the thrust disc; SC120. Finish machining the inner hole of the thrust plate to the size, the surface roughness of the inner hole after finishing is Ra0.2-Ra0.4, and leave a margin on the end face of the thrust plate, which meets the requirements of subsequent combined processing; SC130, single-piece dynamic balance, perform dynamic balance on the thrust disc, the dynamic balance position is taken from the outer circumferential surface of the thrust disc, the rotational speed of the dynamic balance is lower than the first-order critical rotational speed of the high-speed rotor, and the dynamic balance level reaches G0.4-2.5; The steps of assembling and welding in the step S200 include: S210. Insert the first shaft segment of the shaft 2 into the second inner hole of the shaft 1; sleeve the thrust plate on one end of the outer circle corresponding to the second inner hole of the shaft 1 by means of interference shrink fit, The end side of the thrust plate is aligned with the end side of the outer circle corresponding to the second inner hole of the shaft; S220. Using welding process, respectively weld the mating surfaces of the thrust disk and the shaft 1, and the mating surfaces of the shaft 1 and the shaft 2 on the aligned side of one end of the thrust disk and the shaft; In the step S420, the removed parts include the first bearing position, the second bearing position, the welding position and the end face of the thrust plate; The step S450 further includes making the perpendicularity between the thrust plate and the shaft 1 to be 0.001-0.03 mm. 5. The method for manufacturing a high-speed rotor according to claim 3, wherein the high-speed rotor further comprises a thrust plate, which is fixedly sleeved on one end side of the outer circle corresponding to the second inner hole of the shaft; The step S100 also includes processing the thrust disc to a predetermined size, including the following steps: SC110. Rough machining after destressing the blank used for machining the thrust disc; SC120. Finish machining the inner hole of the thrust plate to the size, the surface roughness of the inner hole after finishing is Ra0.2-Ra0.4, and leave a margin on the end face of the thrust plate, which meets the requirements of subsequent combined processing; SC130, single-piece dynamic balance, perform dynamic balance on the thrust plate, the dynamic balance position is taken from the outer circumferential surface of the thrust plate, the dynamic balance speed is lower than the first-order critical speed of the high-speed rotor, and the dynamic balance level reaches G0 .4-2.5; The steps of assembling and welding in the step S200 include: S210. Insert the finished motor magnetic core into the second inner hole of the first shaft by interference heat; insert the first shaft segment of the second shaft into the second inner hole of the first shaft to abut the motor magnetic core; The thrust plate is sleeved on one end of the outer circle corresponding to the second inner hole of the shaft by means of interference shrinkage, and the end side of the thrust plate is connected to the outer circle corresponding to the second inner hole of the shaft. side-to-side alignment; S220. Using welding process, respectively weld the mating surfaces of the thrust disk and the shaft 1, and the mating surfaces of the shaft 1 and the shaft 2 on the aligned side of one end of the thrust disk and the shaft; In the step S420, the removed parts include the first bearing position, the second bearing position, the welding position and the end face of the thrust plate; The step S450 also includes making the perpendicularity between the thrust plate and the shaft 1 to be 0.001-0.03 mm. 6. The manufacturing method of the high-speed rotor according to any one of claims 2-5, characterized in that, further comprising a compressor, a turbine and a lock nut, wherein the compressor and the turbine are sequentially fixed and sleeved on the second shaft of the second shaft segment and fasten it with a lock nut; The step S500 dynamic balancing includes the following steps: S510. Place the rotor after step S400 in a dynamic balancing device, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, remove the amount of the non-working surface of the rotor to remove the unbalanced amount , so that the dynamic balance level reaches G0.4-2.5; S520. Fix the single piece of dynamically balanced compressor, turbine and lock nut on the second shaft in turn, and tighten them with a torque wrench; the single piece of dynamically balanced compressor, turbine and lock nut are dynamically balanced The grade reaches G0.4-2.5; S530. Use a motor or an air blower to drive the rotor to rotate, and perform dynamic balancing based on the first bearing position and/or the second bearing position. During the dynamic balancing process, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, so that the The dynamic balance level reaches G0.4-2.5. 7. The method for manufacturing a high-speed rotor according to claim 6, wherein the step S530 comprises: S531. Use a motor or an air blower to drive the rotor to speed up to 8000-12000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5; S532. Use a motor or an air blower to drive the rotor to speed up to 20000-25000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5; S533. Use a motor or an air blower to drive the rotor to speed up to 25000-60000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5; S534. Use a motor or an air blower to drive the rotor to speed up to 120000rpm and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5; S535. Use a motor or an air blower to drive the rotor up to full speed and check the dynamic balance, remove the amount of the non-working surface of the rotor to remove the unbalanced amount, and make the dynamic balance level reach G0.4-2.5. 8. The method for manufacturing a high-speed rotor according to any one of claims 2-7, wherein the step S440 uses a grinding process for finishing. 9. The method for manufacturing a high-speed rotor according to any one of claims 2-7, wherein the intermediate grinding process in step S450 adopts a special grinding wheel mold, and the special grinding wheel mold is provided with an inner cavity, and the inner cavity The shape and size of the inner wall are the same as the design shape and size of the rotor, and the rotor is placed in the special grinding wheel mold to be finely ground to the size of the rotor. 10. The method for manufacturing a high-speed rotor according to any one of claims 1-7, characterized in that, after all the finishing steps in steps S100-400, the rotor size is checked. 11. The method for manufacturing a high-speed rotor according to any one of claims 1-7, wherein the dynamic balance level is selected as G1. 12. The method for manufacturing a high-speed rotor according to any one of claims 1-7, wherein in the step S500, the amount of the non-working surface of the rotor to be removed adopts automatic laser rust removal or a non-contact type of 0.1-1GHz high-frequency wave. craft. 13. The method for manufacturing a high-speed rotor according to any one of claims 1-7, wherein when a motor magnetic core is provided, in step S500, a motor is used to drive the rotor to rotate to perform a dynamic balance test, and the The stator of the motor is non-contact sleeved at the outer circle corresponding to the magnetic core of the motor, and the magnetic core of the motor serves as the rotor of the motor. 14 . The method for manufacturing a high-speed rotor according to claim 13 , wherein, in the dynamic balancing equipment, the motor and/or bearing used are the original matching motor and/or bearing when the high-speed rotor is working. 15 . 15. The method for manufacturing a high-speed rotor according to claim 14, wherein the bearing is an air bearing. 16. The manufacturing method of a high-speed rotor according to claim 5 or 6, wherein the non-working surface comprises the first inner hole of the first shaft and the boss of the thrust plate. 17 . The method for manufacturing a high-speed rotor according to claim 7 , wherein when the rotor is driven to rotate by air blowing, the gas supply component blows the turbine to drive the rotor to rotate. 18 . 18. The manufacturing method of a high-speed rotor according to claim 7, wherein the non-working surface of the rotor comprises the first inner hole of the first shaft, the boss of the thrust plate, the locking nut and the part of the second shaft passing through the locking nut . 19. The method for manufacturing a high-speed rotor according to claim 7, wherein a spacer ring for axial positioning is provided between the compressor and the turbine, and the compressor, spacer ring, turbine, and lock nut are arranged between the compressor and the turbine. Fix the sleeves on the second shaft in turn, and tighten them with a torque wrench; the dynamic balance level of the compressor, spacer, turbine and lock nut that are dynamically balanced by one piece reaches G0.4-2.5. 20. The method for manufacturing a high-speed rotor according to claim 19, wherein the dynamic balance level is selected as G1.

Images