Vibration exciter mounting and adjusting device for whole-rocket modal test

Abstract

The invention belongs to the technical field of rocket vibration tests, and particularly relates to a whole-rocket modal test vibration exciter installation adjusting device which comprises an equipment platform with the height adjustable relative to a supporting force bearing column, an installation fine adjustment platform installed on the equipment platform and a vibration exciter assembly installed on the installation fine adjustment platform. The installation fine adjustment platform comprises a movable sliding rail, a vibration exciter installation frame, a vibration exciter installation rotating mechanism and a rope. The movable sliding rail is installed on an equipment platform through a sliding rail sliding groove, a vibration exciter installation rotating mechanism is hung at the tail end of the movable sliding rail through a rope, the vibration exciter installation rotating mechanism is connected with a vibration exciter installation frame used for installing a vibration exciter assembly, and the vibration exciter installation rotating mechanism enables the vibration exciter installation frame to have the freedom degree of rotating along a vertical shaft. The vibration exciter assembly comprises a vibration exciter and a vibration exciter suction cup installed on the vibration exciter through a vibration exciter connecting rod, the vibration exciter suction cup is connected with the vacuum negative pressure station, and the vacuum negative pressure station provides negative pressure for the vibration exciter suction cup so that the vibration exciter suction cup can be adsorbed to the surface of the rocket.

Description

Technical Field

[0001] The present application belongs to the technical field of rocket vibration testing, and in particular, relates to a full-arrow modal test exciter installation and adjustment device. Background Art

[0002] A large launch vehicle is a space vehicle composed of multiple sub-stage rockets. The dynamics analysis of its mechanism is one of the essential links in its development process. The mathematical analysis model of its dynamics analysis needs to be fully verified through the modal parameters measured by the full-rocket modal test. In the full-rocket modal test of a certain type of integrated rocket, the large launch vehicle is in a vertical simulation state of launch flight, with an overall height of 50 meters. The test requires the application of excitation force at different heights within a quadrant of the rocket. However, there is no exciter installation and adjustment device on the market that is compatible with a certain large launch vehicle vibration tower. In order to ensure the smooth progress of the full-rocket modal test of this type of launch vehicle, a vibrator installation and adjustment device and method for the full-rocket modal test of liquid rockets are designed. Summary of the invention

[0003] In order to solve the above problems, the present application provides a full-arrow modal test shaker installation and adjustment device, comprising:

[0004] An equipment platform installed on a supporting column and having an adjustable height relative to the supporting column, a mounting fine-tuning platform installed on the equipment platform, and a vibration exciter assembly installed on the mounting fine-tuning platform;

[0005] The installation fine-tuning platform includes a movable slide rail, a vibration exciter installation frame, a vibration exciter installation rotating mechanism, and a rope; the movable slide rail is installed on the equipment platform through a slide rail slide groove, the end of the movable slide rail is suspended by a rope to install the vibration exciter installation rotating mechanism, the vibration exciter installation rotating mechanism is connected to the vibration exciter installation frame for installing the vibration exciter assembly, and the vibration exciter installation rotating mechanism enables the vibration exciter installation frame to have the freedom of rotation along the vertical axis;

[0006] The vibrator assembly includes a vibrator, a vibrator suction cup installed on the vibrator through a vibrator connecting rod, and the vibrator suction cup is connected to a vacuum negative pressure station. The vacuum negative pressure station provides negative pressure to the vibrator suction cup so that the vibrator suction cup is adsorbed on the surface of the rocket.

[0007] Preferably, the supporting load-bearing column includes a vibration tower column, an equipment platform load-bearing column and a load-bearing rack; the load-bearing rack is fixed on the platform load-bearing column in the vertical direction, the platform load-bearing column is fixed on the vibration tower column, and a drive motor is installed on the equipment platform. The drive motor is meshed with the load-bearing rack through a gear, and the drive motor rotates to drive the equipment platform to rise or fall.

[0008] Preferably, the movable slide rail is installed on the equipment platform through two load-bearing mounting beams, the load-bearing mounting beams are fixed on the equipment platform, the load-bearing mounting beams have slide grooves, and the movable slide rail is installed in the slide grooves.

[0009] Preferably, both the movable slide rail and the load-bearing mounting beam have self-locking buckles for locking the relative positions of the movable slide rail and the load-bearing mounting beam.

[0010] Preferably, the ropes are multiple rubber ropes.

[0011] Preferably, the number of rubber ropes is adapted by the support frequency of the vibration exciter.

[0012] Preferably, a rubber ring of the vibrator suction cup is clamped on the vibrator suction cup through a groove.

[0013] Preferably, the equipment platform bearing column is a truss structure formed by connecting two standard sections of the equipment platform bearing column with bolts and nuts.

[0014] Preferably, one end of the rubber rope is fixed to the top of the movable slide rail by using a U-shaped clamp, and the other end of the rubber rope is fixed to the exciter mounting rotating mechanism by using a U-shaped clamp.

[0015] Preferably, one end of the exciter is hinged on the exciter mounting frame, and the other end is threadedly connected through a plurality of mounting holes distributed along the height direction on the exciter mounting frame, and mounting holes of different heights are selected to adjust the pitch angle of the exciter.

[0016] Advantages of this application include:

[0017] (1) The present invention is developed based on a certain type of vibration tower, and the exciter can be installed at any height within a certain quadrant according to the requirements of the full-arrow modal test.

[0018] (2) The large displacement vertical adjustment equipment platform of the present invention can not only be used to install and debug the vibration exciter, but also be used as a bearing and operating platform for the test personnel's arrow surface work.

[0019] (3) The present invention avoids the dangerous factors of traditional scaffolding installation, making the installation and debugging of the exciter safer and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the vibrator and its suction cup;

[0021] Figure 2 Schematic diagram for installing fine-tuning platform;

[0022] Figure 3 This is a schematic diagram of a large displacement vertical adjustment equipment platform;

[0023] Figure 4 This is a schematic diagram of the overall system. DETAILED DESCRIPTION

[0024] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0025] The present invention discloses a full-arrow modal test exciter installation and adjustment device and method, comprising three parts: a device support bearing column, a large-displacement vertical adjustment device platform, and an installation fine-tuning platform;

[0026] The equipment support bearing column is mainly composed of a vibration tower column 17, an equipment platform bearing column 15 and a bearing rack 16. The bearing rack 16 is fastened to the equipment platform bearing column 15 with bolts. The equipment platform bearing column 15 is a truss structure formed by two-by-two standard sections of the equipment platform bearing column spliced ​​by bolts and nuts. The lower end of the equipment platform bearing column 15 is fixed to the foundation by bolts, and the equipment platform bearing column 15 is fixed to the side of the vibration tower column 17 by bolts, and the vibration tower column 17 is fixed to the foundation by bolts. The vibration tower column 17 is a truss structure assembled by bolting standard sections. The equipment support bearing column provides vertical support for the large displacement vertical adjustment equipment platform.

[0027] The large displacement vertical adjustment equipment platform includes an equipment platform 13 and a drive motor 14. The drive motor 14 is connected to a load-bearing rack 16 through a gear rack mechanism. The drive motor 14 is fixed to the equipment platform 13 through bolts and nuts. The drive motor 14 provides a driving force for the large displacement vertical adjustment equipment platform to move up and down. The large displacement vertical adjustment equipment platform provides installation support for installing a fine-tuning platform.

[0028] The installation fine-tuning platform comprises a vibration exciter installation frame 2 , a vibration exciter installation rotating mechanism 3 , a rubber rope 4 , a lifting ring 5 , a movable slide rail 6 , a load-bearing installation beam 7 and a load-bearing installation beam 8 .

[0029] The load-bearing slide rail beam 7 and the load-bearing slide rail beam 8 of the installation fine-tuning platform are installed on the equipment platform 13 by bolts, and the mobile slide rail 6 is installed on the load-bearing slide rail beam 7 and the load-bearing slide rail beam 8 by tightening bolts. The top of the mobile slide rail 6 is designed with a lifting ring 5 for installing the rubber rope 4. The number of rubber ropes is obtained according to the corresponding calculation to meet the requirements of the exciter for the support frequency. One end of the rubber rope 4 is fixed to the top of the mobile slide rail 6 by using a U-shaped clamp, and the other end of the rubber rope 4 is fixed to the exciter installation rotation mechanism 3 by using a U-shaped clamp. The other end of the exciter installation rotation mechanism 3 is fixed to the exciter installation frame 2. The installation rotation mechanism can rotate 360° in the horizontal plane, so that the exciter can rotate in the horizontal plane. The exciter 1 is installed on the exciter installation frame 2 by installing screws, and the installation angle of the exciter in the vertical plane is adjusted. The installation screws on the installation frame 2 are tightened to make the top of the connecting rod of the exciter 1 close to the surface of the arrow body.

[0030] The vibrator connecting rod 12 is installed on the vibrator 1 through a threaded nut, and the vibrator suction cup 10 is connected to the vibrator connecting rod 12 through a threaded nut. The inner groove of the vibrator suction cup rubber ring 9 is clamped on the vibrator suction cup. One end of the negative pressure hose is connected to the vibrator suction cup negative pressure interface 11 through an interference fit, and the other end is connected to the vacuum negative pressure station. The vacuum negative pressure station provides negative pressure to the vibrator suction cup 10 through the negative pressure hose, and the vibrator suction cup 10 is adsorbed on the surface of the rocket through a certain degree of negative pressure.

[0031] The above-mentioned full-arrow modal test shaker installation and adjustment device and method, the shaker installation and adjustment steps include:

[0032] Step (i), the operator presses the start button of the large displacement vertical adjustment equipment platform, and the large displacement vertical adjustment equipment platform rises. After reaching the specified height, the operator presses the stop button, and the large displacement vertical adjustment equipment platform will provide a large stroke displacement in the vertical direction for the installation of the vibrator;

[0033] Step (ii), the installer will suspend the vibrator placed on the operating platform onto the installation fine-tuning platform through the rubber rope 4, and the installation fine-tuning platform will provide a small-amplitude installation displacement adjustment function for the vibrator installation;

[0034] Step (three), move the mobile slide rail of the installation fine-tuning platform, first open the self-locking buckle of the mobile slide rail 6, move it along the direction of the mobile slide rail 6 to the vicinity of the rocket surface, lock the self-locking buckle of the mobile slide rail 6, and at the same time open the self-locking buckles of the load-bearing slide rail beam 7 and the load-bearing slide rail beam 8, and move the mobile slide rail 6 along the load-bearing slide rail beam 7 and the load-bearing slide rail beam 8 until the exciter suction cup is almost close to the installation point on the rocket surface.

[0035] Step (iv), loosen the mounting screws of the vibrator on the vibrator frame 2, rotate the vibrator in the vertical plane until the angle of the vibrator connecting rod in the vertical plane is appropriate, and then tighten the mounting screws. Rotate the vibrator frame 2 through the vibrator mounting rotation mechanism 3 to fine-tune the installation angle of the vibrator in the horizontal plane.

[0036] Step (5), repeat step (3) and step (4) until the vibration exciter suction cup is close to the excitation point on the rocket surface and the vibration exciter connecting rod is nearly perpendicular to the rocket surface. Open the vacuum negative pressure station, and the vibration exciter suction cup is adsorbed to the rocket surface through negative pressure.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A full-arrow modal test shaker installation and adjustment device, characterized in that: include: An equipment platform (13) installed on a supporting load-bearing column and having an adjustable height relative to the supporting load-bearing column, an installation fine-tuning platform installed on the equipment platform (13), and a vibration exciter assembly installed on the installation fine-tuning platform; The installation fine-tuning platform comprises a movable slide rail (6), an exciter installation frame (2), an exciter installation rotating mechanism (3), and a rope; the movable slide rail (6) is installed on the equipment platform (13) through a slide rail slide groove, the end of the movable slide rail (6) is suspended by a rope to the exciter installation rotating mechanism (3), the exciter installation rotating mechanism (3) is connected to the exciter installation frame (2) for installing the exciter assembly, and the exciter installation rotating mechanism (3) enables the exciter installation frame (2) to have the freedom of rotation along the vertical axis; The vibrator assembly comprises a vibrator (1), a vibrator suction cup (10) mounted on the vibrator (1) via a vibrator connecting rod (12), the vibrator suction cup (10) being connected to a vacuum negative pressure station, and the vacuum negative pressure station providing negative pressure to the vibrator suction cup (10) so that the vibrator suction cup (10) is adsorbed on the surface of the rocket.

2. The full-arrow modal test shaker installation and adjustment device according to claim 1, characterized in that: The supporting load-bearing column comprises a vibration tower column (17), an equipment platform load-bearing column (15) and a load-bearing rack (16); the load-bearing rack (16) is fixed on the platform load-bearing column (15) in the vertical direction, the platform load-bearing column (15) is fixed on the vibration tower column (17), and a driving motor (14) is installed on the equipment platform (13); the driving motor (14) is meshed with the load-bearing rack (16) through a gear, and the driving motor (14) rotates to drive the equipment platform (13) to rise or fall.

3. The full-arrow modal test shaker installation and adjustment device according to claim 1, characterized in that: The movable slide rail (6) is installed on the equipment platform (13) via two load-bearing mounting beams. The load-bearing mounting beams are fixed on the equipment platform (13). The load-bearing mounting beams have slide grooves, and the movable slide rail (6) is installed in the slide grooves.

4. The full-arrow modal test shaker installation and adjustment device according to claim 1, characterized in that: Both the movable slide rail (6) and the load-bearing installation beam have self-locking buckles for locking the relative positions of the movable slide rail (6) and the load-bearing installation beam.

5. The full-arrow modal test shaker installation and adjustment device according to claim 1, characterized in that: The ropes are made of a plurality of rubber ropes (4).

6. The full-arrow modal test shaker installation and adjustment device according to claim 5, characterized in that: The number of rubber ropes (4) is adapted by the support frequency of the vibration exciter.

7. The full-arrow modal test shaker installation and adjustment device according to claim 1, characterized in that: The vibration exciter suction cup (10) is clamped with a vibration exciter suction cup rubber ring (9) via a groove.

8. The full-arrow modal test shaker installation and adjustment device according to claim 2, characterized in that: The equipment platform bearing column (15) is a truss structure formed by splicing two by two of the equipment platform bearing column standard sections through bolts and nuts.

9. The full-arrow modal test shaker installation and adjustment device according to claim 5, characterized in that: One end of the rubber rope (4) is fixed to the top end of the movable slide rail (6) by using a U-shaped clamp, and the other end of the rubber rope (4) is fixed to the exciter mounting rotating mechanism (3) by using a U-shaped clamp.

10. The full-arrow modal test shaker installation and adjustment device according to claim 5, characterized in that: One end of the vibration exciter (1) is hinged on the vibration exciter mounting frame (2), and the other end is threadedly connected through a plurality of mounting holes distributed along the height direction on the vibration exciter mounting frame (2), and mounting holes of different heights are selected to adjust the pitch angle of the vibration exciter (1).

Images