A rotor-stator gap wind friction loss testing device and its loading and unloading method

Abstract

The application relates to a rotor-stator gap wind abrasion loss testing device and a loading and unloading method thereof, wherein the testing device comprises a shell, a rotor and a stator; the shell comprises a lower shell and an upper shell which are detachably connected; the rotor is arranged in the shell and rotationally connected with the lower shell, and a cylindrical groove is formed between the rotor, the lower shell and the upper shell; the stator comprises a lower stator and an upper stator which are detachably connected; the lower stator and the upper stator are both arranged in the cylindrical groove, and the lower stator and the upper stator are butted to form a cylindrical structure surrounding the rotor; the upper shell is removed, the upper stator is taken off, one side of the lower stator is pressed, the other side of the lower stator is upwardly taken out of the gap between the lower shell and the rotor, the lower stator is continuously moved to be completely taken out by being grabbed, a new lower stator is arranged in the gap between the lower shell and the rotor, a new upper stator is arranged on the new lower stator, and the upper shell is arranged, so that the replacement of the stator is completed; when the stator is replaced, the rotor does not need to be disassembled, the testing time is shortened, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid power, in particular to a rotor-stator gap wind friction loss test device and its loading and unloading method. BACKGROUND

[0002] High-speed permanent magnet motor is widely used in numerical control machine tools, fuel motor air compressors, aerospace pumps and other fields. The increase of speed is conducive to reducing the volume and weight of the motor, and improving the efficiency of the motor. However, the wind friction loss in the motor loss ratio will gradually increase with the increase of speed, and the wind friction loss has become a factor that must be considered in the design of high-speed motor.

[0003] Accurate calculation of wind friction loss and test verification are the key technologies for wind friction loss research. The basis for test verification is to develop a wind friction loss test device. Usually, when testing, it is often necessary to test the wind friction loss between the stator and the rotor of different specifications. The traditional test device meets the needs of disassembly, but there are still some problems. Assuming that there are n kinds of stators and m kinds of rotors, the number of times of rotor disassembly and shaft system centering is n x m.

[0004] The number of times of rotor disassembly is large, and the shaft system needs to be centered after replacing the rotor each time, which prolongs the test period and increases the cost. SUMMARY

[0005] Therefore, it is necessary to provide a rotor-stator gap wind friction loss test device and its loading and unloading method to solve the problem of a large number of rotor disassembly times, the need for shaft system centering after replacing the rotor each time, a long test period, and high cost.

[0006] In one aspect, the present application provides a rotor-stator gap wind friction loss test device, comprising a housing, a rotor and a stator, the housing comprising a lower housing and an upper housing which are detachably connected; the rotor is arranged in the housing and is in rotational connection with the lower housing, and a cylindrical groove is formed between the rotor, the lower housing and the upper housing; the stator comprises a lower stator and an upper stator which are detachably connected, the lower stator and the upper stator are both arranged in the cylindrical groove, and the lower stator and the upper stator are in abutment to form a cylindrical structure surrounding the rotor, and a rotor-stator gap is formed between the cylindrical structure and the rotor.

[0007] Further, the lower stator and the upper stator are both semi-cylindrical structures.

[0008] Further, the device further comprises a lower sliding block and an upper sliding block, both of which are semi-cylindrical structures, and the lower sliding block and the upper sliding block are respectively fixedly arranged on the side opposite to the lower stator and the upper stator.

[0009] Further, a plurality of threaded holes are formed on the opposite side of the lower slider and the upper slider, and the threaded holes are uniformly arranged along the circumference of the rotor.

[0010] Further, the lower shell and the upper shell are both semi-cylindrical structures.

[0011] Further, the lower shell and the upper shell are detachably connected through a plurality of first connecting screws.

[0012] Further, the shell further comprises two end covers, the two end covers are detachably connected with the upper shell and the lower shell, and the two ends of the rotor are rotatably connected with the two end covers respectively.

[0013] Further, the two ends of the rotor are connected with bearings installed on the two end covers respectively, and the end covers are detachably connected with the lower shell and the upper shell through second connecting screws.

[0014] Further, a protective cover is installed on the side of the end cover away from the rotor, and the protective cover is detachably connected with the end cover to close the bearing mounting hole of the end cover.

[0015] In another aspect, the application provides a method for assembling and disassembling a rotor-stator gap wind abrasion loss test device, which is suitable for the rotor-stator gap wind abrasion loss test device described above, and comprises the following steps:

[0016] The upper shell is disassembled, and the upper stator is removed;

[0017] The other side of the lower stator is pressed to pass through the gap between the lower shell and the rotor upward, and the lower stator is continuously moved to be completely taken out;

[0018] A new lower stator is installed in the gap between the lower shell and the rotor, wherein the new lower stator is slid along the lower shell;

[0019] A new upper stator is placed on the new lower stator, the new upper stator and the new lower stator are adjusted to be aligned in the axial and circumferential directions, and the upper shell is assembled.

[0020] Compared with the prior art, the upper shell is disassembled, the upper stator is removed, the other side of the lower stator is pressed to pass through the gap between the lower shell and the rotor upward, the lower stator is continuously moved to be completely taken out, a new lower stator is installed in the gap between the lower shell and the rotor, a new upper stator is placed on the new lower stator, and the upper shell is assembled, i.e. the replacement process of the stator is completed. When the stator is replaced, the rotor does not need to be disassembled, and for a plurality of specifications of the stator and the rotor, the number of times of disassembling the rotor and re-centering the shaft system is reduced to m, the test time is shortened, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A transverse cross-sectional view of the entire rotor-to-stationary clearance wind friction loss test device provided in an embodiment of the present invention;

[0022] Figure 2 A longitudinal cross-sectional view of the entire rotor-to-stationary clearance wind friction loss test device provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the overall appearance of a rotor-to-stationary clearance wind friction loss test device provided in an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of the assembly and disassembly method of the rotor-static clearance wind friction loss test device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0026] On the one hand, if Figure 1 As shown, an embodiment of the present invention provides a rotor-static clearance wind friction loss test device, including a housing 100, a rotor 200 and a stator 300, the housing 100 includes a lower shell 110 and an upper shell 120 that are detachably connected; the rotor 200 is arranged in the housing 100 and is rotatably connected to the lower shell 110, and a cylindrical groove 210 is formed between the rotor 200 and the lower shell 110 and the upper shell 120; the stator 300 includes a lower stator 310 and an upper stator 320 that are detachably connected, the lower stator 310 and the upper stator 320 are both built into the cylindrical groove 210, and the lower stator 310 and the upper stator 320 are connected to form a cylindrical structure that encloses the rotor 200, and a rotor-static clearance is formed between the cylindrical structure and the rotor 200.

[0027] During implementation, the upper shell 120 is removed, the upper stator 320 is removed, and one side of the lower stator 310 is pressed. The other side of the lower stator 310 is upwardly passed through the gap between the lower shell 110 and the rotor 200. The lower stator 310 is grabbed and driven to continue moving until it is completely removed. The new lower stator 310 is installed in the gap between the lower shell 110 and the rotor 200. The new upper stator 320 is placed on the new lower stator 310 and the upper shell 120 is installed. The replacement process of the stator 300 is completed. When replacing the stator 300, there is no need to remove the rotor 200. For wind friction loss tests of various specifications of stators 300 and rotors 200, with n types of stators 300 and m types of rotors 200, the number of times the rotor 200 is disassembled and the shaft system is realigned is reduced to m, which shortens the test time and saves costs.

[0028] The housing 100 in this embodiment includes a lower shell 110 and an upper shell 120 that are detachably connected.

[0029] In one embodiment, the lower shell 110 and the upper shell 120 are both semi-cylindrical structures. Of course, in other embodiments, the lower shell 110 and the upper shell 120 can also adopt non-semi-circular arc structures, as long as the two can be spliced ​​into a cylindrical shape.

[0030] In one embodiment, the lower housing 110 and the upper housing 120 are detachably connected via a plurality of first connecting screws 121. Of course, in other embodiments, the lower housing 110 and the upper housing 120 may also be connected using a snap-fit ​​structure, with the advantage of providing a stable connection and easy disassembly.

[0031] In this embodiment, the rotor 200 is disposed within the housing 100 and is rotatably connected to the lower housing 110. A cylindrical slot 210 is formed between the rotor 200, the lower housing 110, and the upper housing 120. When each rotor 200 is matched with a different stator 300, only the stator 300 needs to be disassembled, without disassembling the rotor 200.

[0032] like Figures 2-3 As shown, to facilitate the connection between the rotor 200 and the housing 100, in one embodiment, the housing 100 further includes two end caps 130, which are detachably connected to the upper shell 120 and the lower shell 110. The two ends of the rotor 200 are rotatably connected to the two end caps 130. The two ends of the rotor 200 are respectively connected to bearings 131 mounted on the two end caps 130. The end caps 130 are detachably connected to the lower shell 110 and the upper shell 120 via second connecting screws 132. The device also includes a protective cover 133 mounted on the side of the end caps 130 away from the rotor 200. The protective cover 133 is detachably connected to the end caps 130 and is used to seal the bearing mounting holes of the end caps 130.

[0033] In one embodiment, the housing 100 further includes a base 140 mounted on the bottom of the lower shell 110 , and the base 140 can be fixed to the ground by embedded bolts.

[0034] The stator 300 in this embodiment includes a lower stator 310 and an upper stator 320 that are detachably connected. The lower stator 310 and the upper stator 320 are both built into the cylindrical groove 210. The lower stator 310 and the upper stator 320 are connected to form a cylindrical structure that encloses the rotor 200, and a rotor-static gap is formed between the cylindrical structure and the rotor 200.

[0035] In one embodiment, the lower stator 310 and the upper stator 320 are both semi-cylindrical structures. Of course, in other embodiments, the lower stator 310 and the upper stator 320 can also adopt a non-semi-circular arc structure as long as they can be spliced to form a cylindrical structure.

[0036] To avoid friction between the stator 300 and the shell 100 during the process of disassembling and assembling the stator 300, in one embodiment, the device further comprises a lower sliding block 330 and an upper sliding block 340, both of which are semi-cylindrical structures, and the lower sliding block 330 and the upper sliding block 340 are fixedly arranged on the side opposite to the lower stator 310 and the upper stator 320, respectively. The lower sliding block 330 and the lower stator 310, and the upper sliding block 340 and the upper stator 320 can be connected by welding.

[0037] To facilitate the grabbing of the upper stator 320 and the lower stator 310, in one embodiment, a plurality of threaded holes are formed on the side opposite to the lower sliding block 330 and the upper sliding block 340, and the plurality of threaded holes are uniformly arranged along the circumference of the rotor 200. A threaded structure such as a bolt can be connected with the threaded holes of the lower sliding block 330 and the upper sliding block 340, so that the lower sliding block 330 and the upper sliding block 340 are moved by grabbing the threaded structure, that is, the lower stator 310 and the upper stator 320 are grabbed and moved.

[0038] On the other hand, as shown in Figure 4 The present application also provides a method for disassembling and assembling the rotor-stator gap wind friction loss test device, which is suitable for the above-mentioned rotor-stator gap wind friction loss test device, and comprises the following steps:

[0039] Step S100, remove the upper shell and take off the upper stator;

[0040] Step S200, press one side of the lower stator, the other side of the lower stator is upwardly inserted into the gap between the lower shell and the rotor, and the lower stator is grabbed and moved until it is completely taken out;

[0041] Step S300, a new lower stator is inserted into the gap between the lower shell and the rotor, wherein the new lower stator slides along the lower shell;

[0042] Step S400, a new upper stator is placed on the new lower stator, the new upper stator and the new lower stator are adjusted to be aligned in the axial and circumferential directions, and the upper shell is assembled.

[0043] The specific disassembling and assembling process is as follows:

[0044] 1) unscrew the first connecting screw 121 for connecting the upper shell 120 and the lower shell 110, unscrew the second connecting screw 132 between the end cover 130 and the upper shell 120, and take out the upper shell 120.

[0045] 2) Take out the upper stator 320 by the help of the threaded hole of the upper slider 340.

[0046] 3) Keep the rotor 200 still, press the lower slider 330 from one side, slide the lower stator 310 out of the lower housing 110, and then take out the lower stator 310 by the help of the threaded hole of the lower slider 330.

[0047] 4) Put the new lower stator 310 into the gap between the rotor 200 and the lower housing 110, and slide it into the lower housing 110.

[0048] 5) Put the new upper stator 320 on the new lower stator 310, and manually adjust them to be aligned in the axial and circumferential directions.

[0049] 6) Put down the upper housing 120, retighten the first connecting screw 121 and the second connecting screw 132, and force the new lower stator 310 to cooperate with the new upper stator 320 within the tolerance range.

[0050] Compared with the prior art, the upper housing 120 is removed, the upper stator 320 is taken out, one side of the lower stator 310 is pressed, the other side of the lower stator 310 is upwardly inserted into the gap between the lower housing 110 and the rotor 200, the lower stator 310 is grabbed and moved until it is completely taken out, the new lower stator 310 is put into the gap between the lower housing 110 and the rotor 200, the new upper stator 320 is put on the new lower stator 310, and the upper housing 120 is installed, thereby completing the replacement process of the stator 300. When the stator 300 is replaced, the rotor 200 does not need to be disassembled, for the multiple specifications of the stator 300 and the rotor 200, the number of times of disassembling the rotor 200 and re-centering the shaft system is reduced to m, the test time is shortened, and the cost is saved.

[0051] The above description is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A rotor-to-stationary clearance wind friction loss test device, characterized in that: include: a housing comprising a lower housing and an upper housing that are detachably connected; a rotor disposed in the housing and rotatably connected to the lower housing, wherein a cylindrical groove is formed between the rotor, the lower housing, and the upper housing; The stator comprises a detachably connected lower stator and an upper stator, wherein the lower stator and the upper stator are both built into the cylindrical slot, and the lower stator and the upper stator are butted together to form a cylindrical structure enclosing the rotor, and a rotor-static gap is formed between the cylindrical structure and the rotor; When replacing the stator, there is no need to disassemble the rotor.

2. The rotor-to-stationary clearance wind friction loss test device according to claim 1, characterized in that: The lower stator and the upper stator are both semi-cylindrical structures.

3. The rotor-to-stationary clearance wind friction loss test device according to claim 2, characterized in that: The device further comprises a lower slider and an upper slider, both of which are semi-cylindrical structures, and are respectively fixedly arranged on the opposite sides of the lower stator and the upper stator.

4. The rotor-to-stationary clearance wind friction loss test device according to claim 3, characterized in that: A plurality of threaded holes are provided on the side opposite to the upper slider, and the plurality of threaded holes are evenly arranged along the circumference of the rotor.

5. The rotor-to-stationary clearance wind friction loss test device according to claim 1, characterized in that: The lower shell and the upper shell are both semi-cylindrical structures.

6. The rotor-to-stationary clearance wind friction loss test device according to claim 1, characterized in that: The lower shell and the upper shell are detachably connected via a plurality of first connecting screws.

7. The rotor-to-stationary clearance wind friction loss test device according to claim 1, characterized in that: The housing further comprises two end covers, which are detachably connected to the upper shell and the lower shell, and the two ends of the rotor are rotatably connected to the two end covers respectively.

8. The rotor-to-stationary clearance wind friction loss test device according to claim 7, characterized in that: Both ends of the rotor are respectively connected to bearings installed on the two end covers, and the end covers are detachably connected to the lower shell and the upper shell via second connecting screws.

9. The rotor-to-stationary clearance wind friction loss test device according to claim 8, characterized in that: It also includes a protective cover installed on the side of the end cover away from the rotor, and the protective cover is detachably connected to the end cover to close the bearing installation hole of the end cover.

10. A method for assembling and disassembling a rotor-to-stationary clearance wind friction loss test device, characterized in that: The rotor-to-stationary clearance wind friction loss test device according to any one of claims 1 to 9 comprises the following steps: Remove the upper housing and take off the upper stator; Press one side of the lower stator, and push the other side of the lower stator upward through the gap between the lower housing and the rotor, grab and drive the lower stator to continue moving until it is completely removed; The new lower stator is installed into the gap between the lower housing and the rotor, wherein the new lower stator slides in along the lower housing; The new upper stator is placed on the new lower stator, and the new upper stator and the new lower stator are adjusted so that they are aligned in both axial and circumferential directions, and the upper housing is installed.

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