Dynamic balance testing device of magnetic suspension bearing

Abstract

The utility model relates to the technical field of dynamic balance, and discloses a dynamic balance testing device of a magnetic suspension bearing, which comprises a testing cabinet and a pair of couplings, one side of the upper surface of the testing cabinet is fixedly provided with a servo motor through a support frame, and the other side of the upper surface of the testing cabinet is fixedly provided with an electric slide rail. A top shaft is rotationally installed on the upper side of a sliding table of the electric sliding rail through a supporting frame. A tensioning assembly used for installing a shaft sleeve is arranged between the couplings, the end, away from the tensioning assembly, of one coupling is connected with an output shaft of the servo motor, the end, away from the tensioning assembly, of the other coupling is connected with a center shaft, and the center shaft and the top shaft are assembled in an inserted mode. The upper surface of the test cabinet is provided with a clamping assembly used for clamping a magnetic suspension bearing stator. According to the utility model, the magnetic suspension bearing assembly relation in practical application can be rapidly completed, after the servo motor rotates the shaft sleeve and the stator applies an acting force on the shaft sleeve, the dynamic balance test can be completed through the vibration sensor, and the test precision and the correction precision are higher.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic balance, in particular to a dynamic balance testing device for a magnetic suspension bearing. Background Art

[0002] The magnetic bearing mainly includes a stator and a sleeve. The sleeve is installed at the end of the rotor. When working, the magnetic bearing applies a uniform force on the sleeve. For example, when the rotor is subjected to a downward disturbance, it will deviate from its reference position. At this time, the sensor detects the displacement of the rotor from the reference point. The microprocessor as a controller converts the detected displacement into a control signal and then the power amplifier converts this control signal into a control current. The control current generates a magnetic force in the actuator magnet, thereby driving the rotor back to its original balanced position. Therefore, no matter in which direction the rotor is disturbed, the rotor can always be corrected by the magnetic bearing, so that the rotor can be restored to a stable balanced state.

[0003] Since the rotor is dynamically balanced before assembly and use, in order to reduce the impact of the original imbalance on the sleeve, the sleeve needs to be dynamically balanced. Currently, the sleeve is directly tested for dynamic balance using a dynamic balancing tester and then corrected after completion. However, in actual applications, the stator and sleeve work together without a comprehensive dynamic balancing test, and the accuracy of the dynamic balancing test and the correction are both low.

[0004] Therefore, in order to solve the above problems, a dynamic balance test device for a magnetic bearing is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a dynamic balance test device for a magnetic suspension bearing, which performs a comprehensive dynamic balance test in an assembly mode closer to actual application, thereby solving the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dynamic balancing test device for a magnetic bearing, comprising a test cabinet and a pair of couplings, a servo motor is fixedly installed on one side of the upper surface of the test cabinet through a support frame, an electric slide rail is fixedly installed on the other side of the upper surface of the test cabinet, and a top shaft is rotatably installed on the upper side of the slide table of the electric slide rail through a support frame; a tensioning assembly for installing a sleeve is provided between the couplings, one end of the coupling away from the tensioning assembly is connected to the output shaft of the servo motor, and the other end of the coupling away from the tensioning assembly is connected to a center shaft, and the center shaft is plug-assembled with the top shaft; a clamping assembly for clamping the stator of the magnetic bearing is provided on the upper surface of the test cabinet, and a vibration sensor is installed on the upper side of the test cabinet through a metal molding hose.

[0007] Specifically, the tensioning assembly includes a first linkage rod and a second linkage rod, the ends of the couplings close to each other are connected to a rotating shaft, the first linkage rod is evenly rotatably installed on the circumferential side of the rotating shaft, and the second linkage rod is rotatably installed between the first linkage rods aligned on both sides.

[0008] Furthermore, the number of the second linkage rods is 3 to 4 and is evenly distributed around the circumference.

[0009] Specifically, the clamping assembly includes a V-shaped clamp and an electric clamp. The electric clamp is fixedly installed on the upper surface of the test cabinet. The electric clamp is provided with two claw heads that move in opposite directions. The upper sides of the claw heads are fixedly installed with a V-shaped clamp through a support frame. The V-shaped clamp is located on the front and rear sides of the tensioning assembly.

[0010] Specifically, a truncated cone groove is formed at one end of the top shaft close to the central shaft, and the end of the central shaft away from the coupling has the same shape as the truncated cone groove.

[0011] Furthermore, a pressure sensor is installed in the top shaft along the axial direction, and the detection end of the pressure sensor extends into the truncated cone groove.

[0012] Specifically, one of the shaft sleeves is correspondingly provided with two vibration sensors, one of the vibration sensors is provided close to the end surface of the shaft sleeve, and the other of the vibration sensors is provided close to the circumferential side of the shaft sleeve.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the tensioning assembly can be used to tighten and fix shaft sleeves of different sizes in the center, and the clamping assembly can be used to clamp the stators of magnetic bearings of different sizes in the center. The stator and shaft sleeve of the magnetic bearing can quickly complete the assembly relationship during actual application. After the servo motor rotates the shaft sleeve and the stator applies a force on the shaft sleeve, the dynamic balance test can be completed by the vibration sensor, and the test accuracy and correction accuracy are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic front view of the structure of the utility model;

[0015] Figure 2 This is a structural schematic diagram of the tensioning component of the utility model;

[0016] Figure 3 It is a right side view showing the structure of the clamping assembly of the utility model;

[0017] Figure 4 It is a schematic cross-sectional view of the structure of the top shaft of the utility model.

[0018] In the figure: 1. test cabinet, 2. servo motor, 3. tensioning assembly, 31. first linkage rod, 32. second linkage rod, 33. rotating shaft, 4. clamping assembly, 41. V-shaped clamping plate, 42. electric clamping claw, 5. center shaft, 6. top shaft, 7. electric slide rail, 8. truncated cone groove, 9. pressure sensor, 10. bushing, 11. coupling, 12. vibration sensor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 The utility model provides a dynamic balance test device for a magnetic suspension bearing, including a test cabinet 1 and a pair of couplings 11. A servo motor 2 is fixedly installed on one side of the upper surface of the test cabinet 1 through a support frame, and an electric slide rail 7 is fixedly installed on the other side of the upper surface of the test cabinet 1. A top shaft 6 is rotatably installed on the upper side of the slide table of the electric slide rail 7 through a support frame, and the electric slide rail 7 can translate the top shaft 6; the test cabinet 1 is an existing device composed of a control panel and a cabinet body, and the coupling 11, the servo motor 2 and the electric slide rail 7 are also existing devices.

[0021] A tensioning assembly 3 for installing a sleeve 10 is provided between the couplings 11. The radial support distance of the tensioning assembly 3 can be changed by changing the distance between the couplings 11, and the matching sleeve 10 can be conveniently replaced according to the magnetic bearing to be tested; the end of one coupling 11 away from the tensioning assembly 3 is connected to the output shaft of the servo motor 2, and the end of the other coupling 11 away from the tensioning assembly 3 is connected to the center shaft 5. After the center shaft 5 and the top shaft 6 are plugged and assembled, they can provide axial positioning force to the tensioning assembly 3 and can also provide more stable rotation support conditions, and the servo motor 2 can rotate the tensioning assembly 3, the center shaft 5 and the top shaft 6 through the coupling 11.

[0022] The upper surface of the test cabinet 1 is provided with a clamping assembly 4 for clamping the stator of the magnetic bearing. A vibration sensor 12 is installed on the upper side of the test cabinet 1 through a metal molding hose. The metal molding hose can conveniently adjust the position of the vibration sensor 12. The vibration sensor 12 is used to measure the axial and radial vibration information of the sleeve 10.

[0023] Specifically, Figure 2As shown, the tensioning assembly 3 includes a first linkage rod 31 and a second linkage rod 32, and the ends of the couplings 11 that are close to each other are connected to a rotating shaft 33, the first linkage rod 31 is evenly and rotatably installed on the circumferential side of the rotating shaft 33, and the second linkage rod 32 is rotatably installed between the first linkage rods 31 that are aligned on both sides; when the distance between the couplings 11 on both sides changes, the distance between the second linkage rod 32 and the axis of the rotating shaft 33 can be synchronously changed through the support of the first linkage rod 31, and each second linkage rod 32 always remains parallel to the axis of the rotating shaft 33, thereby completing the action of tightening and loosening the sleeves 10 with different diameters.

[0024] Furthermore, the number of the second linkage rods 32 is 3 to 4 evenly distributed on the circumference, so as to increase the contact area between the second linkage rods 32 and the shaft sleeve 10 to ensure that the shaft sleeve 10 can be tightened in the center.

[0025] Specifically, Figure 3 As shown, the clamping assembly 4 includes a V-shaped clamping plate 41 and an electric clamping jaw 42. The electric clamping jaw 42 is fixedly installed on the upper surface of the test cabinet 1. The electric clamping jaw 42 is provided with two claws that move in opposite directions (approaching each other or moving away from each other). The upper sides of the claws are fixedly installed with V-shaped clamping plates 41 through support frames. The V-shaped clamping plates 41 are located on the front and rear sides of the tensioning assembly 3; when the electric clamping jaw 42 moves the V-shaped clamping plate 41 in opposite directions, the stators of magnetic bearings with different diameters can be centrally clamped or released.

[0026] Specifically, Figure 4 As shown, a truncated cone groove 8 is formed at one end of the top shaft 6 close to the center shaft 5, and the end of the center shaft 5 away from the coupling 11 has the same shape as the truncated cone groove 8; this shape of the center shaft 5 and the truncated cone groove 8 has good centering ability and smoother plug-in assembly.

[0027] Furthermore, a pressure sensor 9 is installed axially in the top shaft 6, and the detection end of the pressure sensor 9 extends into the conical groove 8; when the center shaft 5 is inserted into the conical groove 8, it will abut against the detection end of the pressure sensor 9, which is used to measure the axial squeezing force, thereby ensuring the tightening force of the sleeve 10 on the tensioning assembly 3 to prevent the sleeve 10 from moving.

[0028] Two vibration sensors 12 are correspondingly arranged for one shaft sleeve 10, one vibration sensor 12 is arranged close to the end face of the shaft sleeve 10, and the other vibration sensor 12 is arranged close to the circumferential side of the shaft sleeve 10; for the commonly used dynamic balancing detection conditions of 1 to 3 magnetic levitation bearings, each pair of vibration sensors 12 can obtain axial and radial vibration information on each shaft sleeve 10, thereby ensuring the comprehensiveness of dynamic balancing data acquisition.

[0029] The working principle of this embodiment:

[0030] The electrical components such as the servo motor 2, the electric gripper 42, the electric slide rail 7 and the pressure sensor 9 are electrically connected to the computer host of the peripheral device, and human-computer interaction operation is performed through the computer.

[0031] In the initial state, the electric slide rail 7 drives the top shaft 6 to the rightmost end. At this time, there is a sufficient distance between the center shaft 5 and the top shaft 6. Take the bushing 10 of suitable size and quantity and the stator of the magnetic bearing and put them on the tensioning component 3 from the distance. Then control the electric slide rail 7 to drive the top shaft 6 to slide to the left. The center shaft 5 and the truncated cone groove 8 are first aligned and plugged in. As the top shaft 6 continues to slide to the left, it expands outward to support the second linkage rod 32 until the pressure sensor 9 reaches the set value. At this time, the bushing 10 can be positioned, and the stator of the magnetic bearing can be clamped in the center through the clamping component 4 at the same time.

[0032] Each pair of vibration sensors 12 is adjusted to correspond to the end face and circumferential side of the sleeve 10 respectively, and the sleeve 10 on the tensioning assembly 3 is rotated by the servo motor 2. At the same time, the magnetic field generated by the stator of the magnetic bearing is energized to suspend and support the sleeve 10, and the vibration sensor 12 collects vibration data on each sleeve 10 to complete the dynamic balance test of the magnetic bearing, thereby improving the accuracy of the dynamic balance test and the correction accuracy.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dynamic balance test device for a magnetic bearing, comprising a test cabinet (1) and a pair of couplings (11), characterized in that: A servo motor (2) is fixedly mounted on one side of the upper surface of the test cabinet (1) via a support frame, and an electric slide rail (7) is fixedly mounted on the other side of the upper surface of the test cabinet (1), and a top shaft (6) is rotatably mounted on the upper side of the slide table of the electric slide rail (7) via a support frame; a tensioning assembly (3) for mounting a shaft sleeve (10) is provided between the couplings (11), an end of the coupling (11) away from the tensioning assembly (3) is connected to an output shaft of the servo motor (2), and an end of the other coupling (11) away from the tensioning assembly (3) is connected to a center shaft (5), and the center shaft (5) is plug-assembled with the top shaft (6); a clamping assembly (4) for clamping a stator of a magnetic suspension bearing is provided on the upper surface of the test cabinet (1), and a vibration sensor (12) is installed on the upper side of the test cabinet (1) via a metal shaped hose.

2. The dynamic balance test device of a magnetic bearing according to claim 1, characterized in that: The tensioning assembly (3) comprises a first linkage rod (31) and a second linkage rod (32); the ends of the coupling (11) close to each other are both connected to a rotating shaft (33); the first linkage rod (31) is evenly rotatably mounted on the circumferential side of the rotating shaft (33); and the second linkage rod (32) is rotatably mounted between the first linkage rods (31) aligned on both sides.

3. The dynamic balance test device of a magnetic bearing according to claim 2, characterized in that: The number of the second linkage rods (32) is 3 to 4 and is evenly distributed around the circumference.

4. The dynamic balance test device of a magnetic bearing according to claim 1, characterized in that: The clamping assembly (4) comprises a V-shaped clamping plate (41) and an electric clamping claw (42). The electric clamping claw (42) is fixedly mounted on the upper surface of the test cabinet (1). The electric clamping claw (42) is provided with two claw heads that move in opposite directions. The upper sides of the claw heads are fixedly mounted with V-shaped clamping plates (41) via support frames. The V-shaped clamping plates (41) are located at the front and rear sides of the tensioning assembly (3).

5. The dynamic balance test device of a magnetic bearing according to claim 1, characterized in that: A truncated cone groove (8) is formed at one end of the top shaft (6) close to the central shaft (5), and an end of the central shaft (5) away from the coupling (11) has the same shape as the truncated cone groove (8).

6. The dynamic balance test device of a magnetic bearing according to claim 5, characterized in that: A pressure sensor (9) is installed in the top shaft (6) along the axial direction, and a detection end of the pressure sensor (9) extends into the truncated cone groove (8).

7. The dynamic balance test device of a magnetic bearing according to claim 1, characterized in that: One of the shaft sleeves (10) is correspondingly provided with two vibration sensors (12), one of the vibration sensors (12) being provided close to the end surface of the shaft sleeve (10), and the other of the vibration sensors (12) being provided close to the circumferential side of the shaft sleeve (10).

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