Rotor Assembly Rotation Speed Test Device

Abstract

A rotor assembly rotation speed testing device includes a base (1), the base (1) is provided with a workpiece support position (2) for placing a rotor assembly horizontally, a speed measuring element (18) for measuring the rotation speed of a rotor shaft (4) is indirectly or directly fixed to the base (1), a drive component (5) for driving the rotation of the rotor shaft (4) is provided on one lateral side of the workpiece support position (2), the drive component (5) includes an intake base (3) and an impeller (6), a rotation groove (7) for the impeller (6) to rotate is formed at an end of the intake base (3) facing the workpiece support position (2), an opening is formed at this end of the rotation groove (7) for the impeller (6) to enter therein, and an intake passage (8) communicating with an external gas source is provided on the axial outer side of the rotation groove (7). The present device has the advantages of being able to stably convert the input gas source into rotational speed, and having a stable rotational speed output, which can meet the test requirements for high rotational speed and ensure the stability of the test.

Description

Technical Field

[0001] The present invention relates to a rotor assembly rotation speed test device and belongs to the technical field of rotor assemblies.

Background Art

[0002] The rotor assembly of a motor generally includes a rotor core fixed to a rotor shaft. The rotor core includes a magnetic body having holes, and the rotor shaft is received through these holes. Since most magnetic bodies are relatively brittle, if they receive too much stress, they will crack. Therefore, it is necessary to conduct a high-speed rotation test on the rotor assembly under specific curve requirements. During the test, the rotation speed needs to exceed 200,000 revolutions per minute and be able to run steadily for a certain period of time to judge the strength and reliability of the rotor assembly. Currently, generally, a method of combining a magnetic component, a circuit board-fixed magnetic component, and a case is adopted. Specifically, the case is fitted to the target object so that the target object rotates the magnetic component. The magnetic component provides a trigger magnetic field to the circuit board, and the circuit board outputs a square wave signal in response to the trigger magnetic field and transmits the square wave signal to the controller to detect the rotation direction and speed of the target object by the controller according to the square wave signal. Here, the magnet of the magnetic component is fixed to a plastic housing. At high rotation speeds, the plastic case has a risk of cracking, which makes it unable to meet the test requirements of high rotation speeds. Moreover, the detection device is fixed to the rotor system, and due to the non-uniform mass distribution, it is difficult to ensure the stability of the test.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The present invention aims to provide a rotor assembly rotational speed test device that solves the problems existing in the prior art, such as being unable to meet the test requirements of high rotational speeds and having difficulty in ensuring the stability of the test.

Means for Solving the Problems

[0004] The above technical object of the present invention is mainly solved by the following technical solution. A rotor assembly rotational speed test device includes a base, on which a workpiece support position for horizontally placing the rotor assembly is provided. The workpiece support position and the rotor shaft in the rotor assembly form a rotational support. On the base, a speed measurement element for measuring the rotational speed of the rotor shaft is indirectly or directly fixed. On one side in the lateral direction of the workpiece support position, a drive component for driving the rotation of the rotor shaft is provided. The drive component includes an intake base and an impeller sleeved on the end of the rotor shaft and capable of rotating synchronously therewith. At the end of the intake base facing the workpiece support position, a rotation groove for the impeller to rotate is formed. At this end of the rotation groove, an opening for the impeller to enter therein is formed. An intake passage communicating with an external gas source is communicatively provided on the outer side in the circumferential direction of the rotation groove.

[0005] When using the device of the present invention, first, the impeller is externally mounted on the rotor shaft to form a rotor assembly, and this rotor assembly is horizontally placed at the workpiece support position. The impeller is inserted into the rotation groove through the opening of the rotation groove. Then, an external gas source is controlled to send gas into the intake passage. The gas entering through the intake passage is blown onto the impeller from the circumferential direction of the rotation groove to rotate it at high speed, thereby enabling the rotor shaft to rotate at high speed. The rotation speed value of the rotor shaft is measured by a speed measurement element, and a rotation speed test of the rotor assembly is performed. The present invention can stably convert the input gas source into a rotation speed when the gas source is stable, and the rotation speed output is stable, can meet the test requirements of high rotation speed, and can guarantee the stability of the test.

[0006] Preferably, the intake passage horizontally passes through the rotation groove and penetrates both lateral ends of the intake base. One end of the intake passage communicates with an external gas source, the other opposite end of the intake passage communicates with the external space, and the outer end of the impeller blade of the impeller is located within the intake passage.

[0007] The intake passage is installed so as to horizontally pass through the rotation groove and penetrate both lateral ends of the intake base. One end of the intake passage communicates with an external gas source, the other opposite end of the intake passage communicates with the external space, and the outer end of the impeller blade of the impeller is located within the intake passage. Thereby, the gas entering through the intake passage can be directly blown onto the outer end of the impeller blade to rotate it. It has low energy consumption, and by opening both ends of the intake passage, air convection can be generated, the gas can flow quickly, it is easy to blow the impeller to rotate at high speed, has high energy conversion efficiency, and can effectively reduce the test cost.

[0008] Preferably, the number of the intake passages is two, and the two intake passages are installed at intervals vertically along the height direction of the intake base. The two ends on the same side of the two intake passages respectively communicate with the external gas source and the external space.

[0009] Set the number of intake passages to two, and the two intake passages are installed vertically at intervals along the height direction of the intake base. By connecting the two ends on the same side of the two intake passages to an external gas source and an external space respectively, the gas entering through the two intake passages can be blown from the reverse direction onto the outer ends of the blades of the impeller, enabling the impeller to obtain a high rotational speed and further meeting the test requirements of a high rotational speed.

[0010] Preferably, the drive component further includes a baffle sleeved on the rotor shaft and located inside the impeller. When the impeller is located in the rotation groove, the opening of the rotation groove is sealed by the baffle.

[0011] The drive component is further provided with a baffle sleeved on the rotor shaft and located inside the impeller. When the impeller is located in the rotation groove, the opening of the rotation groove is sealed by the baffle, thereby preventing the gas from being blown by the baffle to one side of the workpiece placement position during the test, preventing it from affecting the stable placement of the rotor assembly at the workpiece placement position, and ensuring the stability of the test. Also, the baffle stops the impeller and can prevent it from moving along the rotor shaft to one side of the workpiece placement position during high-speed operation, thereby preventing the impeller from colliding and causing damage.

[0012] Preferably, the cross-sectional shape of the rotation groove is circular, and the diameter of the rotation groove is larger than the outer diameter of the impeller.

[0013] Set the cross-sectional shape of the rotation groove to be circular and the diameter of the rotation groove to be larger than the outer diameter of the impeller, so that the impeller can rotate at high speed in the rotation groove. Also, due to the circular inner wall of the rotation groove, some gas can flow along the circumferential direction of the impeller, enabling the impeller to be better blown and rotated.

[0014] Preferably, the workpiece support position includes two bearings sleeved on the rotor shaft at intervals and rotatable synchronously therewith. The two bearings are located on the same side of the impeller. The workpiece support position further includes two support bases indirectly or directly fixed to the base. The two support bases are installed at intervals left and right. Positioning circular holes penetrating through both left and right ends thereof and conforming to the bearings are formed in the support bases.

[0015] Two bearings sleeved on the rotor shaft at intervals and rotatable synchronously therewith are provided within the workpiece support position. The two bearings are located on the same side of the impeller. The workpiece support position further includes two support bases indirectly or directly fixed to the base. The two support bases are installed at intervals left and right. Positioning circular holes penetrating through both left and right ends thereof and conforming to the bearings are formed in the support bases. Thereby, when the rotor assembly is horizontally placed on the two support bases along the axial direction of the positioning circular holes, the fitting between the outer rings of the two bearings on the rotor shaft and the inner wall of the positioning circular holes can realize the rotational support of the rotor shaft, and the rotor shaft can be easily rotated during the test.

[0016] Preferably, a relief groove extending vertically upward is communicatively provided at the tip of the positioning circular hole. The relief groove penetrates through both left and right ends of the support base and has an opening formed at the top. A screw hole horizontally penetrating through the relief groove is formed in the support base. An adjustment screw is screwed into the screw hole.

[0017] A relief groove extending vertically upward is communicatively provided at the tip of the positioning circular hole, the relief groove penetrates both left and right ends of the support base and an opening is formed at the top, a screw hole horizontally penetrating the relief groove is formed in the support base, and an adjustment screw is screw-fitted into the screw hole. Thereby, the operator can adjust the pitch size of the relief groove by rotating the adjustment screw, easily readjust the fastening of the bearing and the relative position of the rotor assembly before the test, reduce the occurrence of seizure phenomenon of the rotor assembly due to cumulative error, realize a movement with relatively little degree of freedom for the rotor assembly, greatly improve the friction at high rotor rotation speeds, effectively improve the relative service life of the bearing, and also easily enable the rotor assembly to meet the requirement of high rotation speed with a smaller driving force.

[0018] Preferably, the intake base is removably fixed to the base, the intake base is located outside one of the support bases, and the baffle is restricted between the intake base and the support base.

[0019] The intake base is removably fixed to the base, the intake base is located outside one of the support bases, the baffle is restricted between the intake base and the support base. Thereby, after a set of rotor assembly tests is completed, the intake base is removed in a manner of removing it from the support base, and then the next set of rotor assemblies to be tested can be inserted, facilitating continuous testing of the rotor assemblies.

[0020] Preferably, it further includes a case fixed to the base, the workpiece support position is provided in the case, the case is located on the left side of the intake base, an opening is provided on the side of the case facing the intake base, the support base on the right side is located at this opening, and the baffle seals this opening.

[0021] A case is provided at the base, a workpiece support position is provided inside the case, the case is located on the left side of the intake base, an opening is provided on the side of the case facing the intake base, the support base on the right side is located at this opening, and by the baffle sealing this opening, the rotor assembly placed at the workpiece support position by the case can be positioned in a relatively sealed environment, facilitating the simulation of rotor assembly tests in environments with different temperatures. Also, the operator can place the rotor assembly on the support base or remove the rotor assembly through this opening. Furthermore, by cooperating with the removal of the intake base, the insertion and removal of the rotor assembly can be realized.

[0022] Preferably, on one side of the case, two operating passages extending horizontally are formed on the side surfaces of the two support bases. The extending ends of the operating passages communicate with the screw holes and correspond to the heads of the adjustment screws, and openings are formed at the opposite ends of the operating passages.

[0023] Two operating passages extending horizontally are formed on one side of the case on the side surfaces of the two support bases. The extending ends of the operating passages communicate with the screw holes and correspond to the heads of the adjustment screws, and openings are formed at the opposite ends of the operating passages. Thereby, after placing the rotor assembly, the operator can insert a tool through the operating passage to rotate the adjustment screw to adjust the fastening of the bearing.

[0024] Preferably, the speed measurement element is a laser light speed measurement probe. The speed measurement element is fixed to the top of the case through a fixing plate, and a light passage hole for the laser light from the speed measurement element to pass through is formed at the top of the case.

[0025] Set the speed measurement element setting to a laser light speed measurement probe. The speed measurement element is fixed to the top of the case via a fixing plate, and a light passing hole is formed at the top of the case for the laser light from the speed measurement element to pass through. Thus, when the speed measurement element operates, the emitted laser light can be irradiated onto the rotor shaft at the workpiece support position through the light passing hole, enabling the measurement of the rotational speed of the rotor shaft.

Advantages of the Invention

[0026] Therefore, when the gas source is stable, the present invention can stably convert the input gas source into a rotational speed, and the rotational speed output is stable, can meet the test requirements of high rotational speed, and can guarantee the stability of the test, etc.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0028] Hereinafter, the technical solution of the present invention will be further specifically described with reference to the drawings by way of examples.

[0029] As shown in FIGS. 1, 2, 3 and 5, the rotor assembly rotational speed test device described in the present invention includes a base 1 and a case 16 fixed to the base 1. A speed measurement element 18 for measuring the rotational speed of the rotor shaft 4 is indirectly fixed to the base 1. The speed measurement element 18 is a laser light speed measurement probe. The speed measurement element 18 is fixed to the top of the case 16 via a fixing plate 20. A light passing hole 19 for the laser light from the speed measurement element 18 to pass through is formed at the top of the case 16. The base 1 is provided with a workpiece support position 2 for horizontally placing the rotor assembly. The workpiece support position 2 is provided inside the case 16. The workpiece support position 2 and the rotor shaft 4 in the rotor assembly form a rotational support. The workpiece support position 2 includes two bearings 10 sleeved at an interval from the rotor shaft 4 and rotatable synchronously therewith. The two bearings 10 are located on the same side of the impeller 6. The workpiece support position 2 further includes two support bases 11 indirectly or directly fixed to the base 1. The two support bases 11 are installed at intervals left and right. The support base 11 is a bearing base. Positioning circular holes 12 penetrating through both left and right ends thereof and adapted to the bearings 10 are formed inside the support base 11. A relief groove 13 extending vertically upward is communicatively provided at the tip of the positioning circular hole 12. The relief groove 13 is rectangular. The relief groove 13 penetrates through both left and right ends of the support base 11 and an opening is formed at the top. A screw hole 14 horizontally penetrating the relief groove 13 is formed inside the support base 11. An adjustment screw 15 is screwed into the screw hole 14. The adjustment screw 15 is a bolt with a hexagonal hole.

[0030] As shown in FIGS. 2 and 4, the case 16 is located on the left side of the intake base 3. Transparent observation windows are formed on the front side and the top of the case 16. An opening is provided on the side of the case 16 facing the intake base 3. The right support base 11 is located at this opening, and the baffle 9 seals this opening. On one side of the case 16, two operation passages 17 extending horizontally on the side surfaces of the two support bases 11 are formed. The extending ends of the operation passages 17 communicate with the screw holes 14 and correspond to the heads of the adjustment screws 15. An opening is formed at the other opposite end of the operation passage 17.

[0031] As shown in FIGS. 3, 5 and 6, on one side in the lateral direction of the workpiece support position 2, a drive component 5 for driving the rotation of the rotor shaft 4 is provided. The drive component 5 includes an intake base 3 and an impeller 6 sleeved on the end of the rotor shaft 4 and capable of rotating synchronously therewith. The impeller 6 may be a fan. The intake base 3 is removably fixed to the base 1. The intake base 3 and the base 1 are connected and fixed via bolts with hexagonal holes. The intake base 3 is located outside one of the support bases 11. A rotation groove 7 for the impeller 6 to rotate is formed at the end of the intake base 3 facing the workpiece support position 2. The cross-sectional shape of the rotation groove 7 is circular, and the diameter of the rotation groove 7 is larger than the outer diameter of the impeller 6. An opening for the impeller 6 to enter is formed at this end of the rotation groove 7. The drive component 5 further includes a baffle 9 sleeved on the rotor shaft 4 and located inside the impeller 6. When the impeller 6 is located in the rotation groove 7, the opening of the rotation groove 7 is sealed by the baffle 9, and the baffle 9 is restricted between the intake base 3 and the support base 11.

[0032] As shown in Fig. 6, an intake passage 8 communicating with an external gas source is provided in communication with the outer side in the circumferential direction of the rotation groove 7. The cross-sectional shape of the intake passage 8 is circular. The intake passage 8 passes horizontally through the rotation groove 7 and penetrates both lateral ends of the intake base 3. One end of the intake passage 8 communicates with the external gas source, and an air nozzle is attached to the end of the intake passage 8 communicating with the external gas source. The external gas source is an air compressor. The other opposite end of the intake passage 8 communicates with the external space. The outer ends of the blades of the impeller 6 are located within the intake passage 8. The number of the intake passages 8 is two. The two intake passages 8 are installed at intervals vertically along the height direction of the intake base 3. The two ends on the same side of the two intake passages 8 communicate with the external gas source and the external space respectively.

[0033] When specifically implementing this embodiment, first, the impeller 6, the baffle 9 and the two bearings 10 are externally mounted on the rotor shaft 4 to form a rotor assembly. Then, the intake base 3 is removed from the base 1. Further, one side of the bearing 10 of this rotor assembly is inserted into the positioning circular hole 12 from one side of the right support base 11, and the two bearings 10 are positioned in the corresponding positioning circular holes 12. Then, the intake base 3 is fixedly attached to the designated position on the base 1. The impeller 6 is inserted into the rotation groove 7 through the opening of the rotation groove 7, and the baffle 9 is positioned between the right support base 11 and the intake base 3. Then, the external gas source is controlled to send gas into the two ends on different sides of the two intake passages 8, and the gas entering through the two intake passages 8 is blown from the reverse direction to the outer ends of the blades of the impeller 6 to drive its high-speed rotation, thereby rotating the rotor shaft 4 at high speed. At this time, the rotation speed value of the rotor shaft 4 is measured by the speed measurement element 18, and a rotation speed test of the rotor assembly is performed.

[0034] The present invention has advantages such as being able to stably convert the input gas source into a rotation speed when the gas source is stable, having a stable rotation speed output, being able to meet the test requirements of high rotation speed, and being able to guarantee the stability of the test.

Explanation of Reference Numerals

[0035] The reference signs in the drawings are as follows respectively. 1. Base; 2. Workpiece support position; 3. Intake base; 4. Rotor shaft; 5. Drive component; 6. Impeller; 7. Rotating groove; 8. Intake passage; 9. Baffle; 10. Bearing; 11. Support base; 12. Positioning circular hole; 13. Relief groove; 14. Threaded hole; 15. Adjusting screw; 16. Case; 17. Operation passage; 18. Speed measurement element; 19. Light passage hole; 20. Fixed plate.

Claims

1. A rotor assembly rotational speed test device, comprising a base (1), wherein the base (1) is provided with a workpiece support position (2) for horizontally placing the rotor assembly, and the workpiece support position (2) and a rotor shaft (4) within the rotor assembly form a rotational support. The base (1) is indirectly or directly fixed with a speed measurement element (18) for measuring the rotational speed of the rotor shaft (4). On one lateral side of the workpiece support position (2), a drive component (5) for driving the rotation of the rotor shaft (4) is provided. The drive component (5) includes an intake base (3) and an impeller (6) sleeved on an end of the rotor shaft (4) and capable of rotating synchronously therewith. At an end of the intake base (3) facing the workpiece support position (2), a rotation groove (7) for the impeller (6) to rotate is formed. An opening for the impeller (6) to enter therein is formed at this end of the rotation groove (7). An intake passage (8) communicating with an external gas source is communicatively provided outside the circumferential direction of the rotation groove (7). The drive component (5) further includes a baffle (9) sleeved on the rotor shaft (4) and positioned inside the impeller (6). When the impeller (6) is positioned within the rotation groove (7), the opening of the rotation groove (7) is sealed by the baffle (9). The workpiece support position (2) includes two bearings (10) sleeved on the rotor shaft (4) at an interval and capable of rotating synchronously therewith. The two bearings (10) are positioned on the same side of the impeller (6). The workpiece support position (2) further includes two support bases (11) indirectly or directly fixed to the base (1). The two support bases (11) are installed at an interval left and right. Positioning circular holes (12) penetrating through both left and right ends thereof and adapted to the bearings (10) are formed within the support bases (11). At the tip of the positioning circular hole (12), a relief groove (13) extending vertically upward is communicatively provided. The relief groove (13) penetrates both the left and right ends of the support base (11) and has an opening formed at the top. Inside the support base (11), a screw hole (14) horizontally penetrating the relief groove (13) is formed. An adjustment screw (15) is screwed into the screw hole (14). A rotor assembly rotational speed test device characterized by this.

2. The intake passage (8) horizontally passes through the rotation groove (7), penetrates both lateral ends of the intake base (3). One end of the intake passage (8) communicates with an external gas source, the other opposite end of the intake passage (8) communicates with an external space, and the outer ends of the blades of the impeller (6) are located inside the intake passage (8). The rotor assembly rotational speed test device according to Claim 1, characterized by this.

3. The number of the intake passages (8) is two. The two intake passages (8) are installed at intervals along the height direction of the intake base (3). The two ends on the same side of the two intake passages (8) respectively communicate with an external gas source and an external space. The rotor assembly rotational speed test device according to Claim 1, characterized by this.

4. The intake base (3) is removably fixed to the base (1). The intake base (3) is located outside one of the support bases (11). The baffle (9) is restricted between the intake base (3) and the support base (11). The rotor assembly rotational speed test device according to Claim 1, characterized by this.

5. It further includes a case (16) fixed to the base (1). The workpiece support position (2) is provided inside the case (16). The case (16) is located on the left side of the intake base (3). An opening is provided on the side of the case (16) facing the intake base (3). The support base (11) on the right side is located at this opening. The baffle (9) seals this opening. The rotor assembly rotational speed test device according to Claim 1, characterized by this.

6. On one side of the case (16), two operation passages (17) extending horizontally are formed on the side surfaces of the two support bases (11). The extension ends of the operation passages (17) communicate with the screw holes (14) and correspond to the heads of the adjustment screws (15). An opening is formed at the other opposite end of the operation passages (17). The rotor assembly rotational speed test device according to claim 5, characterized in that.

7. The speed measurement element (18) is a laser light speed measurement probe. The speed measurement element (18) is fixed to the top of the case (16) via a fixing plate (20). A light passage hole (19) for the laser light of the speed measurement element (18) to pass through is formed at the top of the case (16). The rotor assembly rotational speed test device according to claim 5, characterized in that.

Images