A disc motor rotor running state deformation measurement device and method

Abstract

The present invention belongs to the technical field of disc motors, and in particular, relates to a disc motor rotor deformation measurement device and method in operation state, the device comprising: a combined rotor structure, which comprises a simulated rotor and a motor rotor assembled at the lower end of the simulated rotor and fixed by a locking nut, the simulated rotor rotates in a vacuum chamber with a supporting shaft as the axis, the outer diameter of the simulated rotor is larger than the outer diameter of the motor rotor, and the annular area of ​​the upper end surface of the motor rotor not covered by the positive projection of the simulated rotor is used as an annular collection area; a position parameter collection structure, the collection end of which is arranged above the annular collection area; a speed collection structure, the collection end of which is arranged above the simulated rotor. The present invention can realize the measurement of the motor rotor deformation in the operation state, the measurement process does not affect the operation of the machine, the measurement accuracy is high, and all the motor rotor deformation data in the motor lifting and rated rotor processes can be obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of disc motors, and in particular relates to a device and method for measuring deformation of a disc motor rotor in running state. Background Art

[0002] Disc motors have been widely used in the field of high-speed rotating machinery, such as energy storage flywheels, electric vehicles and other engineering occasions due to their compact structure and high power density.

[0003] The disc-shaped motor rotor is one of the most common rotor structures in disc motors. When the motor is working, the motor rotor rotates at high speed. At high speeds, especially at speeds of tens of thousands or hundreds of thousands per minute, the motor rotor will produce elastic-plastic deformation. The deformation is related to the mechanical properties and rotor dynamics of the motor rotor, and is an important parameter for the verification of the mechanical properties of the motor rotor, the reliability evaluation of the motor rotor, and the verification of the dynamics of the motor rotor. Therefore, it is of great significance to measure the deformation of the motor rotor during operation.

[0004] As a high-speed rotating part, measuring the deformation state of the motor rotor during operation has always been a technical challenge.

[0005] First, at high speeds, the motor rotor in operation generally operates in a closed vacuum environment, making it difficult to measure using a visual method;

[0006] Second, the motor rotor rotates at high speed, making it difficult to use contact measurement methods.

[0007] In view of the shortcomings of existing testing methods, a disc motor rotor operating state deformation measurement device and method are designed, which can perform non-contact measurement on the motor rotor in the state of dragging a simulated rotor and measure the change of motor rotor deformation in real time, which has important practical significance. Summary of the invention

[0008] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a non-contact disc motor rotor deformation measurement device and method in the running state. The invention can realize the measurement of the motor rotor deformation in the running state. The measurement process does not affect the operation of the machine, the measurement accuracy is high, and all the motor rotor deformation data during the motor rising cycle and rated rotor process can be obtained.

[0009] The technical solution adopted by the present invention to solve this problem is:

[0010] A device for measuring deformation of a disc rotor in a disc motor in operation state, comprising:

[0011] A combined rotor structure, comprising a simulated rotor and a motor rotor assembled at the lower end of the simulated rotor and fixed by a locking nut, wherein the simulated rotor rotates in a vacuum chamber with a supporting shaft as an axis, the outer diameter of the simulated rotor is larger than the outer diameter of the motor rotor, and an annular area on the upper end surface of the motor rotor that is not covered by the orthographic projection of the simulated rotor serves as an annular collection area;

[0012] A position parameter acquisition structure, wherein the acquisition end is arranged above the annular acquisition area;

[0013] The speed collection structure has a collection end arranged above the simulated rotor.

[0014] Preferably, the vacuum chamber comprises a test bench, a motor stator and an outer sleeve fixed on the test bench, and a flange fixed on the upper part of the outer sleeve for sealing, and a support block is bonded below the flange.

[0015] Further preferably, the vacuum chamber further comprises a damper and a support shaft which pass through the motor stator and are fixed to the lower part of the motor stator, and the simulated rotor is assembled on the top end of the support shaft.

[0016] Further preferably, the simulated rotor is a gyro-type structure, and the outer diameter of the simulated rotor is 42 mm to 52 mm.

[0017] Further preferably, the motor rotor is a disc-shaped motor rotor.

[0018] Further preferably, the difference between the outer diameter of the motor rotor and the outer diameter of the simulated rotor is 36 mm to 46 mm.

[0019] Further preferably, the position parameter acquisition structure includes a photoelectric displacement sensor fixed below the support block and a displacement display meter connected to the photoelectric displacement sensor via a signal line, and the photoelectric displacement sensor is located above the annular acquisition area.

[0020] Further preferably, the number of the photoelectric displacement sensors is one or more. When the number of the photoelectric displacement sensors is plural, each of the photoelectric displacement sensors is respectively arranged above a plurality of different circumferences of the annular area.

[0021] Further preferably, the speed acquisition structure includes a speed probe fixed below the support block and a tachometer connected to the speed probe via a signal line, and the speed probe is located above the simulated rotor.

[0022] The second invention object of the present invention is to provide a method for measuring the deformation of a disc rotor in a disc motor in operation, comprising the following steps:

[0023] S101: Before the test begins, record the distance parameter D0 of the photoelectric displacement sensor in the initial state;

[0024] S102: Start the frequency upgrade. During the frequency upgrade, every 10 seconds -1 Record the distance parameter Di of the photoelectric displacement sensor once;

[0025] S103: Under the rated synchronization state, the distance parameter Di is observed every 10 minutes until the distance parameter Di is stable and unchanged, and the stable distance parameter Di is recorded;

[0026] S104: The motor rotor deformation at a certain speed △ = initial distance parameter D0 - actual distance parameter Di. If the calculation result is a positive value, it means that the edge shape of the motor rotor is warped upward, otherwise it is warped downward;

[0027] S105: By recording the motor rotor deformation △ at different rotation speeds, the changing relationship between the motor rotor deformation and the rotation speed can be obtained, and the whole process deformation of the corresponding position can be obtained.

[0028] The advantages and positive effects of the present invention are as follows: the present invention places a non-contact photoelectric displacement sensor above a running motor rotor, can perform non-contact measurement on the motor rotor in a state of dragging a simulated rotor, and measure the change in the motor rotor deformation in real time; through the cooperation of a position parameter acquisition structure and a speed acquisition structure, it is possible to measure the motor rotor deformation in a state of high-speed operation of the motor rotor in a closed vacuum environment by a visual method; the measurement process does not affect the operation of the machine, the measurement accuracy is high, and all motor rotor deformation data in the motor lifting and rated rotor processes can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0030] Figure 1 A disc motor rotor deformation measurement device in operation state according to the present invention;

[0031] In the figure: 1. outer sleeve; 2. simulated rotor; 3. motor rotor; 4. test bench; 5. damper; 6. motor stator; 7. supporting shaft; 8. photoelectric displacement sensor; 9. supporting block; 10. displacement display meter; 11. tachometer; 12. speed probe; 13. flange; D. sensor collection area; S. distance between the lower end face of the photoelectric displacement sensor and the upper end face of the motor rotor. DETAILED DESCRIPTION

[0032] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked only in one place in the same drawing.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "screwing" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The present invention is described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1:

[0035] A device for measuring deformation of a disc rotor in a disc motor in operation state comprises: a combined rotor structure, comprising a simulated rotor 2 and a motor rotor 3 assembled at the lower end of the simulated rotor 2 and fixed by a locking nut, wherein the simulated rotor 2 rotates in a vacuum chamber with a supporting shaft as an axis, the outer diameter of the simulated rotor 2 is larger than the outer diameter of the motor rotor 3, and an annular area of ​​the upper end surface of the motor rotor 3 that is not covered by the orthographic projection of the simulated rotor 2 serves as an annular collection area; a position parameter collection structure, wherein a collection end is arranged above the annular collection area; and a speed collection structure, wherein a collection end is arranged above the simulated rotor 2.

[0036] In actual machines, such as flywheel systems, the motor rotor 3 is often integrally connected to the load, and the axial space of the motor rotor 3 is small. It is very difficult to dynamically measure the motor rotor 3 in an actual machine. Therefore, it is necessary to simulate the rotor 2 to simulate the actual speed state and provide measurement space for the axial direction of the motor rotor 3.

[0037] In this embodiment, Figure 1 As shown, the simulated rotor 2 is assembled on the top of the support shaft 7, the motor rotor 3 is assembled on the lower end of the simulated rotor 2 and fixed by a locking nut, and the acquisition end of the position parameter acquisition structure is a photoelectric displacement sensor 8 placed above the running motor rotor 3, which is used to measure the deformation of a certain position of the motor rotor, such as Figure 1 As shown, area D is the sensor acquisition area; the acquisition end of the speed acquisition structure is a speed probe 12 placed above the running simulated rotor 2, which is used to measure the speed of the motor rotor.

[0038] This device places a non-contact photoelectric displacement sensor above the running motor rotor, and can perform non-contact measurement on the motor rotor in the state of dragging a simulated rotor, and measure the change in the motor rotor deformation in real time. Through the cooperation of the position parameter acquisition structure and the speed acquisition structure, the motor rotor deformation in the high-speed running state in a closed vacuum environment can be measured by a visual method. The measurement process does not affect the operation of the machine, the measurement accuracy is high, and all the motor rotor deformation data in the motor rising cycle and rated rotor process can be obtained.

[0039] Furthermore, in this embodiment, it can be considered that the vacuum chamber includes a test bench 4, a motor stator 6 and an outer sleeve 1 fixed on the test bench 4, and a flange 13 fixed on the upper side of the outer sleeve 1 for sealing, and a support block 9 is bonded below the flange 13. The vacuum chamber is vacuumed, which is suitable for the high-speed operation of the motor rotor. The vacuum environment is conducive to operation and reduces friction power consumption.

[0040] Furthermore, in this embodiment, it can also be considered that the vacuum chamber also includes a damper 5 and a support shaft 7 that pass through the motor stator 6 and are fixed to the lower part of the motor stator 6, and the simulated rotor 2 is assembled on the top end of the support shaft 7.

[0041] Furthermore, in this embodiment, it can be considered that the simulated rotor 2 is a gyro-type structure, the outer diameter of the simulated rotor 2 can be selected from 42mm to 52mm, the simulated rotor material is preferably 40Cr, and the simulated rotor is a gyro-type structure, and its material strength needs to ensure that the simulated rotor does not deform and operates stably and safely at the rated operating speed, and the speed is higher than 100000rpm. The main function of the simulated rotor is: in an actual machine such as a flywheel system, the motor rotor and the load are often integrally connected, and the axial space of the motor rotor is small. It is very difficult to dynamically measure the motor rotor in an actual machine, so a simulated rotor is needed to simulate the actual speed state and provide a measurement space for the axial direction of the motor rotor.

[0042] Furthermore, in this embodiment, it can also be considered that the motor rotor 3 is a disc-shaped motor rotor.

[0043] Furthermore, in this embodiment, it can also be considered that the difference between the outer diameter of the motor rotor 3 and the outer diameter of the simulated rotor 2 is 36 mm to 46 mm, preferably 41 mm, and the annular area is used for the photoelectric displacement sensor 8 to collect the position parameters of the motor rotor 3.

[0044] Furthermore, in this embodiment, it can also be considered that the position parameter acquisition structure includes a photoelectric displacement sensor 8 fixed under the support block 9 and a displacement display meter 10 connected to the photoelectric displacement sensor 8 through a signal line, and the photoelectric displacement sensor 8 is located above the annular acquisition area.

[0045] Furthermore, in the present embodiment, it can be considered that the number of the photoelectric displacement sensors 8 is one or more, and the collection area of ​​the photoelectric displacement sensor 8 is a φ5.0 mm area. A single sensor can be used to measure the deformation at a single position, or multiple sensors at different positions can be used to measure the deformation at multiple points. When the number of the photoelectric displacement sensors 8 is multiple, each of the photoelectric displacement sensors 8 is respectively arranged above multiple different circumferences of the annular area, and the deformation at different positions of the edge area of ​​the motor rotor can be measured.

[0046] Furthermore, in this embodiment, it can also be considered that the distance S between the lower end surface of the photoelectric displacement sensor 8 and the upper end surface of the motor rotor 3 is 1.5 mm to 2 mm.

[0047] Furthermore, in this embodiment, it can also be considered that the speed acquisition structure includes a speed probe 12 fixed under the support block 9 and a tachometer 11 connected to the speed probe 12 through a signal line, and the speed probe 12 is located above the simulated rotor 2.

[0048] Working principle of embodiment 1: Figure 1 The device for measuring the deformation of a disc motor rotor in operation state shown in the figure comprises a test bench 4, a motor stator 6 and an outer sleeve 1 fixed on the test bench, a flange 13 fixed on the upper part of the outer sleeve for sealing, a support block 9 bonded to the lower part of the flange, a displacement sensor 8 and a speed probe 12 fixed to the lower part of the support block, a displacement display meter 10 and a speed meter 11 connected to the photoelectric displacement sensor and the speed probe through a signal line, a damper 5 passing through the motor stator and fixed to the lower part of the motor stator, a support shaft 7, a simulated rotor 2 assembled to the top end of the support shaft, and a motor rotor 3 assembled to the lower end of the simulated rotor and fixed with a locking nut.

[0049] This device is used to measure the deformation of the motor rotor in operation. When measuring, first ensure that the photoelectric displacement sensor 8 and the speed probe 12 are connected and display is normal. Before the test begins, record the initial state of the displacement sensor distance parameter D0. Perform the up-cycle start, and every 10 seconds during the up-cycle process -1Record the distance parameter Di of the displacement sensor once. Under the rated synchronous state, observe the distance parameter Di every 10 minutes until the distance parameter Di stabilizes and records the distance parameter Di after stabilization. The motor rotor deformation △ at a certain speed = initial distance parameter D0-actual distance parameter Di. When the calculation result is a positive value, it means that the edge shape of the motor rotor is warped, otherwise it is warped. By recording the motor rotor deformation △ at different speeds, the relationship between the motor rotor deformation and the speed can be obtained, and the full process deformation of the corresponding position can be obtained.

[0050] Embodiment 2:

[0051] A method for measuring deformation of a disc rotor in a disc motor in operation state comprises the following steps:

[0052] S101: Before the test begins, record the distance parameter D0 of the photoelectric displacement sensor 8 in the initial state;

[0053] S102: Start the frequency upgrade. During the frequency upgrade, every 10 seconds -1 Record the distance parameter Di of the photoelectric displacement sensor 8 once;

[0054] S103: Under the rated synchronization state, the distance parameter Di is observed every 10 minutes until the distance parameter Di is stable and unchanged, and the stable distance parameter Di is recorded;

[0055] S104: The motor rotor deformation at a certain speed △ = initial distance parameter D0 - actual distance parameter Di. If the calculation result is a positive value, it means that the edge shape of the motor rotor is warped upward, otherwise it is warped downward;

[0056] S105: By recording the motor rotor deformation △ at different rotation speeds, the changing relationship between the motor rotor deformation and the rotation speed can be obtained, and the whole process deformation of the corresponding position can be obtained.

[0057] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A device for measuring the deformation of a disc motor disc rotor in operation state. Features: include: A combined rotor structure, comprising a simulated rotor (2) and a motor rotor (3) mounted at the lower end of the simulated rotor (2) and fixed by a locking nut, the simulated rotor (2) rotating in a vacuum chamber with a support shaft as an axis, the outer diameter of the simulated rotor (2) being larger than the outer diameter of the motor rotor (3), and an annular area of ​​the upper end surface of the motor rotor (3) not covered by the orthographic projection of the simulated rotor (2) serving as an annular collection area; A position parameter acquisition structure, wherein the acquisition end is arranged above the annular acquisition area; A speed collection structure, wherein a collection end of the structure is arranged above the simulated rotor (2); The vacuum chamber comprises a test bench (4), a motor stator (6) and an outer sleeve (1) fixed on the test bench (4), and a flange (13) fixed on the upper side of the outer sleeve (1) for sealing, wherein a support block (9) is bonded to the lower side of the flange (13); The vacuum chamber further comprises a damper (5) and a support shaft (7) which pass through the motor stator (6) and are fixed to the lower part of the motor stator (6), and the simulated rotor (2) is mounted on the top end of the support shaft (7).

2. A disc motor disc rotor running state deformation measuring device according to claim 1, Features: The simulated rotor (2) is a gyro-type structure, and the outer diameter of the simulated rotor (2) is 42 mm to 52 mm.

3. A disc motor disc rotor running state deformation measuring device according to claim 2, Features: The motor rotor (3) is a disc-shaped motor rotor.

4. A disc motor disc rotor running state deformation measuring device according to claim 3, Features: The difference between the outer diameter of the motor rotor (3) and the outer diameter of the simulated rotor (2) is 36 mm to 46 mm.

5. A disc motor disc rotor running state deformation measuring device according to any one of claims 1 to 4, Features: The position parameter acquisition structure comprises a photoelectric displacement sensor (8) fixed below a support block (9) and a displacement display meter (10) connected to the photoelectric displacement sensor (8) via a signal line, wherein the photoelectric displacement sensor (8) is located above the annular acquisition area.

6. A disc motor disc rotor running state deformation measuring device according to claim 5, Features: The number of the photoelectric displacement sensors (8) is one or more. When the number of the photoelectric displacement sensors (8) is plural, each of the photoelectric displacement sensors (8) is arranged above a plurality of different circumferences of the annular area.

7. A disc motor disc rotor running state deformation measuring device according to claim 6, Features: The speed acquisition structure comprises a speed probe (12) fixed below the support block (9) and a tachometer (11) connected to the speed probe (12) via a signal line, wherein the speed probe (12) is located above the simulated rotor (2).

8. A method for measuring the deformation of a disc rotor in a disc motor during operation. Features: The following steps are involved: S101: Before the test begins, record the distance parameter D0 of the photoelectric displacement sensor (8) in the initial state; S102: Start the frequency upgrade. During the frequency upgrade, every 10 seconds -1 Recording a distance parameter Di of the photoelectric displacement sensor (8); S103: Under the rated synchronization state, the distance parameter Di is observed every 10 minutes until the distance parameter Di is stable and unchanged, and the stable distance parameter Di is recorded; S104: The motor rotor deformation at a certain speed △ = initial distance parameter D0 - actual distance parameter Di. When the calculation result is a positive value, it means that the edge shape of the motor rotor is warped upward, otherwise it is warped downward; S105: By recording the motor rotor deformation △ at different rotation speeds, the changing relationship between the motor rotor deformation and the rotation speed can be obtained, and the whole process deformation of the corresponding position can be obtained.

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