A rotor lateral dynamics simulation test bench

Abstract

This utility model discloses a rotor transverse dynamics simulation test bench, including a test bench, a variable frequency motor movably mounted on the test bench, multiple sets of test pieces capable of providing different loads and detachably connected to the connecting shaft of the variable frequency motor, a first moving part mounted on the test bench for driving the variable frequency motor to move and connect the connecting shaft to the test pieces, and a second moving part movably mounted on one side of the first moving part for driving the multiple sets of test pieces to move and align the different test pieces with the connecting shaft. When conducting tests under different load conditions, this utility model eliminates the need for manual replacement of different counterweights. Simply controlling the electric push rod and servo motor allows the connecting shaft of the variable frequency motor to be inserted into the simulated rotor with counterweight discs of different weights. Changing loads is convenient and efficient, making it suitable for practical use.

Description

Technical Field

[0001] This utility model relates to a simulation test bench, and more particularly to a rotor transverse dynamics simulation test bench. Background Technology

[0002] The rotor transverse dynamics simulation test bench is driven by an ABB small three-phase asynchronous motor and equipped with a frequency converter to adjust the speed. By selecting bearings with different fault types, the frequency characteristics of bearing defects can be verified at different speeds. It can also perform rotor dynamic balancing tests, start-up and shutdown tests, and is equipped with a safety protection acrylic cover and magnetic switch. It can conduct experiments alone or in combination with various defects in a safe and controllable environment. As an innovative experimental platform for studying the fault characteristics of rotating machinery, it fully meets the extensive needs of teaching simulation and scientific research users.

[0003] Existing rotor transverse dynamics simulation test benches typically install counterweights of different weights at the front end of the rotor during actual use to obtain test data under different load conditions. However, in actual use, the counterweights are heavy, and replacing them is time-consuming and laborious, which undoubtedly reduces the overall test efficiency and is inconvenient for actual use. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a rotor transverse dynamics simulation test bench that facilitates the replacement of counterweights.

[0005] Technical Solution: This utility model discloses a rotor transverse dynamics simulation test bench, including a test bench, a variable frequency motor movably mounted on the test bench, multiple test pieces with different loads and detachably connected to the connecting shaft of the variable frequency motor, a first moving part mounted on the test bench and used to drive the variable frequency motor to move so as to connect the connecting shaft with different test pieces, and a second moving part movably mounted on one side of the first moving part and used to drive the multiple test pieces to move so as to align the different test pieces with the connecting shaft; the test piece includes two bearing seats mounted on the second moving part, a simulated rotor rotatably connected to the two bearing seats, and a counterweight plate connected to the end of the simulated rotor away from the variable frequency motor, wherein the end of the simulated rotor near the variable frequency motor is provided with a plug-in slot, and a plug-in block that plugs into the plug-in slot is fixedly connected to the connecting shaft.

[0006] Furthermore, the first movable component includes an end plate fixedly installed on the test bench, an electric push rod fixedly connected to the end plate, and a movable base fixedly connected to the movable end of the electric push rod, wherein the variable frequency motor is fixedly installed on the movable base.

[0007] Furthermore, the test bench is provided with a first slide rail, and the bottom of the movable base is provided with a first guide block that matches the first slide rail.

[0008] Furthermore, the second moving component includes a moving base fixedly connected to the test bench, a servo motor fixedly installed on one side of the moving base, a lead screw fixedly connected to the output shaft of the servo motor, a threaded sleeve threadedly connected to the lead screw, a limiting slide plate fixedly connected to the threaded sleeve and matching the limiting strip hole opened on the top of the moving base, and a moving base plate slidably disposed on the top of the moving base and fixedly connected to the limiting slide plate, and the bearing seats of multiple sets of the test pieces are fixedly installed on the moving base plate.

[0009] Furthermore, the test bench is provided with a second slide rail, and the bottom of the movable base plate is provided with a second guide block that matches the second slide rail.

[0010] Furthermore, the counterweight disc is connected to the simulated rotor via connecting bolts and locking nuts.

[0011] Furthermore, the direction in which the first moving component drives the variable frequency motor to move is perpendicular to the direction in which the second moving component drives the test piece to move.

[0012] Furthermore, the weight of the counterweights of the multiple sets of test pieces gradually increases along a certain direction of movement of the test piece.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages: When conducting tests under different load conditions, the present invention does not require manual replacement of different counterweights. It only requires controlling the electric push rod and servo motor to make the connecting shaft of the frequency converter motor plug into the simulated rotor with counterweight discs of different weights. It is convenient and efficient to change different loads, which is convenient for practical use. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention;

[0015] Figure 2 For the present utility model Figure 1 Enlarged view of the A-structure in the middle;

[0016] Figure 3 This is a top view of the present invention with the test piece and the movable base plate removed;

[0017] Figure 4 This is a cross-sectional view of the movable base of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0019] This utility model discloses a rotor transverse dynamics simulation test bench, such as Figure 1 and Figure 2As shown, the system includes a test bench 1, a variable frequency motor 6, test pieces, a first moving part, and a second moving part. The variable frequency motor 6 is movably mounted on the test bench 1. A connecting shaft 7 is fixedly mounted on the output shaft of the variable frequency motor 6, and the connecting shaft 7 is detachably connected to the test piece. Multiple sets of test pieces are provided, each with a different load. The connecting shaft 7 can be connected to different test pieces to perform tests under different load conditions. The first moving part is mounted on the test bench 1, and the variable frequency motor 6 is mounted on the first moving part. The first moving part drives the variable frequency motor 6 to move, allowing the connecting shaft 7 to be inserted into or separated from the test piece. Multiple sets of test pieces are mounted on the second moving part, which is located to one side of the first moving part and mounted on the test bench 1. The second moving part drives the multiple sets of test pieces to move, aligning different test pieces with the connecting shaft 7. Combined with the first moving part, this allows the connecting shaft 7 to connect with different test pieces. Furthermore, the direction in which the first moving part drives the variable frequency motor 6 is perpendicular to the direction in which the second moving part drives the test piece.

[0020] like Figure 1 and Figure 2 As shown, the test piece includes a bearing housing 16, a simulated rotor 17, and a counterweight plate 19. There are two bearing housings 16, which are fixedly mounted on the second moving part. The simulated rotor 17 is rotatably connected to the two bearing housings 6, and both ends of the simulated rotor 17 extend to the opposite sides of the two bearing housings 6. The counterweight plate 19 is connected to the end of the simulated rotor 17 away from the variable frequency motor 6, and the weight of the counterweight plate 19 installed on different test pieces is different. Preferably, the counterweight plate 19 is connected to the simulated rotor 17 by connecting bolts 18 and locking nuts 20. The simulated rotor 17 has a plug-in slot 21 at one end near the variable frequency motor 6, and a plug-in block 22 that plugs into the plug-in slot 21 is fixedly connected to the connecting shaft 7. The connecting shaft 7 is detachably connected to the simulated rotor 17 through the plug-in block 22 and the plug-in slot 21. When it is necessary to connect the two, the first moving part is adjusted to move the variable frequency motor 6 and the connecting shaft 7 toward the simulated rotor 17 until the two are plugged in; when it is necessary to disassemble the two, the first moving part is adjusted to move the variable frequency motor 6 and the connecting shaft 7 away from the simulated rotor 17 until the two are separated.

[0021] Preferably, the weight of the counterweight plate 19 of the multiple test pieces gradually increases along the unidirectional movement direction of the test pieces, which facilitates gradually increasing or decreasing the load during the test.

[0022] like Figure 1As shown, the first moving component includes an end plate 2, an electric push rod 3, and a moving base 4. The end plate 2 is fixedly mounted on the test bench 1, the electric push rod 3 is fixedly connected to the end plate 2, and the moving base 4 is fixedly connected to the movable end of the electric push rod 3. A variable frequency motor 6 is fixedly mounted on the moving base 4. By controlling the extension or retraction of the electric push rod 3, the moving base 4 can move towards or away from the test piece. A first slide rail 5 is provided on the test bench 1, and a first guide block matching the first slide rail 5 is provided at the bottom of the moving base 4. The first guide block and the first slide rail 5 guide the movement of the moving base 4, causing it to move in a preset linear path and improving the stability of the moving base 4 when driving the variable frequency motor 6.

[0023] like Figure 1 , Figure 3 and Figure 4 As shown, the second moving component includes a moving base 8, a servo motor 9, a lead screw 10, a threaded sleeve 11, a limiting slide plate 12, and a moving base plate 14. The moving base 8 is a box structure and is fixedly connected to the test bench 1. The servo motor 9 is fixedly installed on one side of the moving base 8. The lead screw 10 is fixedly connected to the output shaft of the servo motor 9, and the end of the lead screw 10 away from the servo motor 9 is rotatably connected to the inner wall of the moving base 8. The threaded sleeve 11 is threadedly connected to the lead screw 10, and the limiting slide plate 12 is fixedly installed on the threaded sleeve 11. A limiting slot 13 is opened on the top of the moving base 8, and the limiting slide plate 12 slides and engages with the limiting slot 13, and the limiting slide plate 12 passes through the limiting slot 13. The moving base plate 14 is fixedly connected to the top of the limiting slide plate 12. A second slide rail 15 is provided on the test bench 1, and a second guide block matching the second slide rail 15 is provided at the bottom of the moving base plate 14. The bearing seats 16 of multiple test pieces are fixedly installed on the moving base plate 14. The second slide rail 15 and the second guide block guide the movement of the movable base plate 14, ensuring it moves in a predetermined straight line and improving stability when the base plate 14 moves the test pieces. The length of the second slide rail 15 is the same as the width of the test bench 1, allowing the movable base plate 14 to partially move to the outside of the test bench 1 without affecting its normal movement due to the servo motor 9's mounting position. In use, the servo motor 9 drives the lead screw 10 to rotate, which in turn moves the threaded sleeve 11, causing the limiting slide plate 12 to move along the limiting strip hole 13. This allows the movable base plate 14 to move synchronously with multiple test pieces, aligning the simulated rotors 17 of different test pieces with the connecting shaft 7. When acquiring test data under different load conditions, manual replacement of different counterweights is unnecessary. Simply controlling the electric push rod 3 and the servo motor 9 allows the connecting shaft 7 of the frequency converter motor 6 to connect with the simulated rotors 17 equipped with different weight counterweight discs 19, making replacement convenient and efficient.

[0024] Usage: During the test, adjust the servo motor 9, which drives the lead screw 10 to rotate. The lead screw 10 moves the threaded sleeve 11, causing the limiting slide plate 12 to move along the limiting strip hole 13. This causes the moving base plate 14 to move synchronously with multiple test pieces. After the simulated rotor 17 of the preset test piece is aligned with the connecting shaft 7, turn off the servo motor 9. Then, control the electric push rod 3 to extend, causing the frequency converter motor 6 and the connecting shaft 7 to move toward the simulated rotor 17 until the plug block 22 is plugged into the plug slot of the simulated rotor 17. Then, turn off the electric push rod 3 and start the frequency converter motor 6 to conduct the test. When testing under different load conditions is required, first control the electric push rod 3 to shorten, so that the frequency converter motor 6 and the connecting shaft 7 move away from the simulated rotor 17 until the plug-in block 22 separates from the plug-in slot of the simulated rotor 17, then turn off the electric push rod 3; then adjust the servo motor 9 to align the simulated rotor 17 of another set of test pieces with the connecting shaft 7; then control the electric push rod 3 to extend again, so that the frequency converter motor 6 and the connecting shaft 7 move toward the simulated rotor 17 until the plug-in block 22 is plugged into the plug-in slot of the simulated rotor 17.

Claims

1. A rotor transverse dynamics simulation test bench, characterized in that: The test includes a test bench (1), a variable frequency motor (6) movably mounted on the test bench (1), multiple test pieces with different loads and detachably connected to the connecting shaft (7) of the variable frequency motor (6), a first moving part mounted on the test bench (1) and used to drive the variable frequency motor (6) to move so that the connecting shaft (7) can be connected to different test pieces, and a second moving part movably mounted on one side of the first moving part and used to drive multiple test pieces to move so that different test pieces can be aligned with the connecting shaft (7); the test pieces include two bearing seats (16) mounted on the second moving part, a simulated rotor (17) rotatably connected to the two bearing seats (16), and a counterweight plate (19) connected to the end of the simulated rotor (17) away from the variable frequency motor (6). The simulated rotor (17) has a plug-in slot (21) at the end near the variable frequency motor (6), and a plug-in block (22) that plugs into the plug-in slot (21) is fixedly connected on the connecting shaft (7).

2. The rotor transverse dynamics simulation test bench according to claim 1, characterized in that: The first movable component includes an end plate (2) fixedly installed on the test bench (1), an electric push rod (3) fixedly connected to the end plate (2), and a movable base (4) fixedly connected to the movable end of the electric push rod (3). The variable frequency motor (6) is fixedly installed on the movable base (4).

3. The rotor transverse dynamics simulation test bench according to claim 2, characterized in that: The test bench (1) is provided with a first slide rail (5), and the bottom of the movable base (4) is provided with a first guide block that matches the first slide rail (5).

4. The rotor transverse dynamics simulation test bench according to claim 1, characterized in that: The second moving part includes a moving base (8) fixedly connected to the test bench (1), a servo motor (9) fixedly installed on one side of the moving base (8), a lead screw (10) fixedly connected to the output shaft of the servo motor (9), a threaded sleeve (11) threadedly connected to the lead screw (10), a limiting slide plate (12) fixedly connected to the threaded sleeve (11) and matching the limiting strip hole (13) opened on the top of the moving base (8), and a moving base plate (14) slidably disposed on the top of the moving base (8) and fixedly connected to the limiting slide plate (12), and the bearing seats (16) of multiple sets of the test pieces are fixedly installed on the moving base plate (14).

5. The rotor transverse dynamics simulation test bench according to claim 4, characterized in that: The test bench (1) is provided with a second slide rail (15), and the bottom of the movable base plate (14) is provided with a second guide block that matches the second slide rail (15).

6. The rotor transverse dynamics simulation test bench according to claim 1, characterized in that: The counterweight plate (19) is connected to the simulated rotor (17) by connecting bolts (18) and locking nuts (20).

7. The rotor transverse dynamics simulation test bench according to claim 1, characterized in that: The direction in which the first moving part drives the variable frequency motor (6) to move is perpendicular to the direction in which the second moving part drives the test piece to move.

8. The rotor transverse dynamics simulation test bench according to claim 1, characterized in that: The weight of the counterweight disc (19) of the multiple sets of test pieces gradually increases along a certain direction of movement of the test piece.

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