Rotation and static gap wind friction loss test device and loading and unloading method thereof

Abstract

The invention relates to a rotor and static gap wind friction loss test device and a loading and unloading method thereof, the test 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 is rotationally connected with the lower shell; a cylindrical groove is formed among 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 in butt joint to form a cylindrical structure enclosing the rotor; the upper shell is disassembled, the upper stator is taken down, one side of the lower stator is pressed, the other side of the lower stator upwards penetrates out of the gap between the lower shell and the rotor, the lower stator is grabbed and driven to continuously move until the lower stator is 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 installed; when the stator is replaced, the rotor does not need to be disassembled, so that the test time is shortened, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid power, and in particular to a rotor-static clearance wind friction loss test device and a assembling and disassembling method thereof. Background Art

[0002] High-speed permanent magnet motors are widely used in CNC machine tools, fuel motor air compressors, and various aerospace pumps. Increasing the speed is beneficial to reducing the size and weight of the motor and improving the motor efficiency. However, the proportion of wind friction loss in motor loss will gradually increase with the increase of speed. Wind friction loss has become a factor that must be considered in the design of high-speed motors.

[0003] Accurately calculating wind friction loss and conducting experimental verification is the key technology for conducting wind friction loss research. The basis for conducting experimental verification is to trial-produce a wind friction loss test device. Usually, during the test, it is often necessary to test the wind friction loss between stators and rotors of various specifications. The traditional test device meets the requirements of disassembly, but there are still certain problems. Assuming that there are n types of stators and m types of rotors, after all the tests, the number of times the rotor is disassembled and the shaft system is realigned is n×m.

[0004] The rotor is disassembled many times, and the shaft system needs to be aligned after each rotor replacement, which results in a long test cycle and high cost. Summary of the invention

[0005] In view of this, it is necessary to provide a rotor-static clearance wind friction loss test device and its loading and unloading method to solve the problems of frequent rotor disassembly, shaft alignment after each rotor replacement, long test cycle and high cost.

[0006] On the one hand, the present invention provides a rotor-static clearance wind friction loss test device, comprising a housing, a rotor and a stator, the housing comprising a lower shell and an upper shell that are detachably connected; the rotor is arranged in the housing and is rotatably connected to 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 that are detachably connected, the lower stator and the upper stator are both built into the cylindrical groove, the lower stator and the upper stator are butt-jointed to form a cylindrical structure that encloses the rotor, and a rotor-static clearance is formed between the cylindrical structure and the rotor.

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

[0008] Furthermore, the device also includes a lower slider and an upper slider, both of which are semi-cylindrical structures, and the lower slider and the upper slider are respectively fixedly arranged on the opposite sides of the lower stator and the upper stator.

[0009] Furthermore, 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.

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

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

[0012] Furthermore, the housing further comprises two end covers, the two end covers are detachably connected to the upper housing and the lower housing, and the two ends of the rotor are rotatably connected to the two end covers respectively.

[0013] Furthermore, two 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.

[0014] Furthermore, 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 mounting hole of the end cover.

[0015] On the other hand, the present invention provides a method for loading and unloading a rotor-static clearance wind friction loss test device, which is applicable to the rotor-static clearance wind friction loss test device as described above, and includes the following steps: Remove the upper housing and take out the upper stator; Press one side of the lower stator, and the other side of the lower stator goes 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, the new upper stator and the new lower stator are adjusted so that they are aligned axially and circumferentially, and the upper housing is installed.

[0016] Compared with the prior art, the upper shell is disassembled, the upper stator is taken off, one side of the lower stator is pressed, and the other side of the lower stator is upwardly passed through the gap between the lower shell and the rotor, and the lower stator is grabbed and driven to continue to move until it is completely taken out, and 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 installed, and the stator replacement process is completed. When replacing the stator, there is no need to disassemble the rotor. For stator and rotor wind friction loss tests of various specifications with n types of stators and m types of rotors, the number of rotor disassembly and shaft system realignment is reduced to m, which shortens the test time and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A transverse cross-sectional view of the entire rotor-to-stationary clearance wind friction loss test device provided in an embodiment of the present invention; 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; 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; Figure 4 A schematic diagram of a method for loading and unloading a rotor-static clearance wind friction loss test device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are 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, but are not used to limit the scope of the present invention.

[0019] 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, 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.

[0020] 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 passes upward through the gap between the lower shell 110 and the rotor 200, and the lower stator 310 is grabbed and driven to continue moving until it is completely taken out. The new lower stator 310 is installed in the gap between the lower shell 110 and the rotor 200, and the new upper stator 320 is placed on the new lower stator 310, and the upper shell 120 is installed, and the replacement process of the stator 300 is completed. When replacing the stator 300, the rotor 200 does not need to be disassembled. For wind friction loss tests of stators 300 and rotors 200 of various specifications, where there are 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.

[0021] The housing 100 in this embodiment includes a lower housing 110 and an upper housing 120 that are detachably connected.

[0022] 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.

[0023] 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 by a buckle or other structure, preferably with a stable connection and convenient disassembly.

[0024] The rotor 200 in this embodiment is disposed in the housing 100 and is rotatably connected to the lower housing 110, and a cylindrical groove 210 is formed between the rotor 200, the lower housing 110 and the upper housing 120. When each rotor 200 matches a different stator 300, it is not necessary to disassemble the rotor 200, but only the stator 300.

[0025] like Figure 2-3 As shown, in order to facilitate the connection between the rotor 200 and the housing 100, in one embodiment, the housing 100 further includes two end covers 130, which are detachably connected to the upper housing 120 and the lower housing 110, and the two ends of the rotor 200 are rotatably connected to the two end covers 130. The two ends of the rotor 200 are respectively connected to the bearings 131 installed on the two end covers 130, and the end covers 130 are detachably connected to the lower housing 110 and the upper housing 120 via the second connecting screws 132. The device further includes a protective cover 133 installed on the side of the end cover 130 away from the rotor 200, and the protective cover 133 is detachably connected to the end cover 130 to close the bearing mounting hole of the end cover 130.

[0026] In one embodiment, the housing 100 further includes a base 140 installed at the bottom of the lower housing 110 , and the base 140 can be fixed on the ground by embedded bolts.

[0027] 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.

[0028] 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 non-semi-circular arc structures, as long as the two can be spliced ​​to form a cylindrical structure.

[0029] In order to avoid friction between the stator 300 and the housing 100 during the process of loading and unloading the stator 300, in one embodiment, the device further includes a lower slider 330 and an upper slider 340, both of which are semi-cylindrical structures, and the lower slider 330 and the upper slider 340 are respectively fixedly arranged on the opposite sides of the lower stator 310 and the upper stator 320. The lower slider 330 and the lower stator 310, as well as the upper slider 340 and the upper stator 320, can be connected by welding.

[0030] In order to facilitate the grasping of the upper stator 320 and the lower stator 310, in one embodiment, a plurality of threaded holes are provided on the opposite sides of the lower slider 330 and the upper slider 340, and the plurality of threaded holes are evenly arranged along the circumference of the rotor 200. A threaded structure such as a bolt can be connected to the threaded holes of the lower slider 330 and the upper slider 340, so that the lower slider 330 and the upper slider 340 can be driven to move by grasping the bolt and the like structure, that is, the lower stator 310 and the upper stator 320 can be grasped and driven to move.

[0031] On the other hand, Figure 4 As shown, an embodiment of the present invention further provides a method for assembling and disassembling a rotor-static clearance wind friction loss test device, which is applicable to the rotor-static clearance wind friction loss test device as above, and includes the following steps: Step S100, dismantle the upper housing and remove the upper stator; Step S200, press one side of the lower stator, and the other side of the lower stator passes upward through the gap between the lower housing and the rotor, grabbing and driving the lower stator to continue moving until it is completely removed; Step S300, 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; Step S400: Place the new upper stator on the new lower stator, adjust the new upper stator and the new lower stator so that they are aligned in the axial direction and the circumferential direction, and install the upper housing.

[0032] The specific loading and unloading process is as follows: 1) Unscrew the first connecting screw 121 used to connect 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 remove the upper shell 120.

[0033] 2) Take out the upper stator 320 by leveraging the threaded hole of the upper slider 340 .

[0034] 3) Keep the rotor 200 still, press the lower slider 330 from one side, slide the lower stator 310 out along the lower housing 110, and then use the threaded hole of the lower slider 330 to take out the lower stator 310.

[0035] 4) Install the new lower stator 310 into the gap between the rotor 200 and the lower housing 110 , and slide it along the lower housing 110 .

[0036] 5) Place the new upper stator 320 on the new lower stator 310 and adjust manually so that the two are aligned in the axial direction and the circumferential direction.

[0037] 6) Lower the upper housing 120 , re-tighten the first connecting screw 121 and the second connecting screw 132 , and force the new lower stator 310 and the new upper stator 320 to fit within the tolerance range.

[0038] Compared with the prior art: the upper shell 120 is removed, the upper stator 320 is taken out, one side of the lower stator 310 is pressed, and the other side of the lower stator 310 is upwardly passed through the gap between the lower shell 110 and the rotor 200, and the lower stator 310 is grabbed and driven to continue to move until it is completely taken out, and a new lower stator 310 is installed in the gap between the lower shell 110 and the rotor 200, and a new upper stator 320 is placed on the new lower stator 310, and the upper shell 120 is installed, that is, the replacement process of the stator 300 is completed. When replacing the stator 300, the rotor 200 does not need to be disassembled. For the wind friction loss test of stators 300 and rotors 200 of various specifications, there are n kinds of stators 300 and m kinds of rotors 200, the number of times of disassembly of the rotor 200 and realignment of the shaft system is reduced to m kinds, which shortens the test time and saves costs.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

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 is 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 lower stator and an upper stator which are detachably connected, wherein the lower stator and the upper stator are both built into the cylindrical groove, 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.

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-station clearance wind friction loss test device according to claim 2, characterized in that: The device also includes 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-station 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-station 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-station 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-station 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 housing and the lower housing, and the two ends of the rotor are rotatably connected to the two end covers respectively.

8. The rotor-to-station clearance wind friction loss test device according to claim 7, characterized in that: The two ends of the rotor are respectively connected to the 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-station 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 is applicable to any one of claims 1 to 9, comprising the following steps: Remove the upper housing and take out the upper stator; Press one side of the lower stator, and the other side of the lower stator goes 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, the new upper stator and the new lower stator are adjusted so that they are aligned axially and circumferentially, and the upper housing is installed.

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