Static force and dynamic force all-condition loading simulation device

Abstract

The invention provides a static force and dynamic force full-working-condition loading simulation device. Static force and dynamic force loading can be achieved on a propulsion shafting of a ship. And load simulation and vibration isolation can be realized. The static force and dynamic force all-condition loading simulation device comprises a force loading unit, a load simulation unit and a vibration test platform, the vibration test platform is connected with a foundation through a plurality of vibration isolators; a tested shafting is installed on the vibration test platform. The force loading unit is used for applying an axial static loading force and a dynamic loading force to the tested shafting; and the load simulation unit is used for realizing load simulation of the tested shafting.

Description

Technical Field

[0001] The invention relates to a loading simulation device, in particular to a static force and dynamic force full-working condition loading simulation device, belonging to the technical field of simulation test. Background Art

[0002] During the voyage of a ship, the power generated by the main engine is transmitted to the propeller, causing the propeller to rotate, and at the same time, the thrust generated by the rotation of the propeller is transmitted to the hull through the thrust bearing to propel the ship. In this complex process, the propulsion motor transmits torque to the propeller, and at the same time, the propeller transmits static thrust to the thrust bearing through the propulsion shaft system; while during the voyage of the ship, the uneven wake field formed at the stern will generate unsteady pulsating force on the propeller, causing the propulsion shaft system to produce periodic vibration and deformation, which not only affects the mechanical properties of the shaft system, but also reduces the ship's acoustic stealth capability.

[0003] Because, in order to verify the rationality and reliability of the shaft system design, it is necessary to design a set of dynamic force and static force full-condition loading simulation devices to simulate the deformation and stress distribution of the shaft system under unsteady pulsating loads. Summary of the invention

[0004] In view of this, the present invention provides a static force and dynamic force full-condition loading simulation device, which can realize static force and dynamic force loading on the propulsion shaft system of a ship; and can simulate loads and realize vibration isolation.

[0005] The technical solution of the present invention is: a static force and dynamic force full-condition loading simulation device, comprising: a force loading unit, a load simulation unit, a prime mover, and a test platform;

[0006] The test platform is connected to the foundation via a number of vibration isolators;

[0007] The shaft system to be tested is installed on the test platform;

[0008] The force loading unit is used to apply axial static loading force and dynamic loading force to the shaft system under test;

[0009] The load simulation unit is used to simulate the load of the shaft system under test;

[0010] The prime mover is used to provide power to the shaft system under test to make it rotate.

[0011] As a preferred embodiment of the present invention: the force loading unit comprises: a loading device, a force sensor, a stop wall and a moving wall;

[0012] The movable wall base is fixed on the ground, and the movable wall is slidably matched with the movable wall base;

[0013] The stop wall is fixed on one side of the movable wall on the ground;

[0014] The fixed end of the loading device is connected to the movable wall, and the loading rod is connected through the force sensor stop wall;

[0015] The loading device is used to output a static loading force or a dynamic loading force;

[0016] The measured shaft system is connected to the other side of the movable wall through the load simulation unit.

[0017] As a preferred embodiment of the present invention: the load simulation unit comprises: a dynamometer;

[0018] A mounting platform for a load simulation unit is arranged on the side of the movable wall away from the stop wall; the dynamometer is arranged on the mounting platform; a thrust bearing A is connected to the output shaft of the dynamometer; a thrust bearing B is connected to the output shaft of the prime mover; one end of the measured shaft system is connected to the thrust bearing B, and the other end is connected to the thrust bearing A through a coupling.

[0019] As a preferred embodiment of the present invention: the movable wall base is fixed on the guide rail on the ground by bolts;

[0020] The stop wall is fixed on the guide rail on the ground by bolts.

[0021] As a preferred embodiment of the present invention: limit blocks are installed at both ends of the movable wall base in the sliding direction of the movable wall to prevent the movable wall from detaching from the movable wall base.

[0022] As a preferred embodiment of the present invention, the vibration isolator is an airbag vibration isolator, and the height and levelness of the test platform can be adjusted by adjusting the pressure of the airbag in the airbag vibration isolator.

[0023] As a preferred embodiment of the present invention: a pit for installing the test platform is provided on the ground, a cement pier is provided in the pit as the installation foundation of the test platform, and the test platform is connected to the cement pier through a plurality of vibration isolators.

[0024] As a preferred embodiment of the present invention: a plurality of guide rails are installed on the upper surface of the test platform to provide a plurality of different installation positions for the installation platform; the installation platform is fixed to the guide rails by bolts, and the prime mover and the shaft system to be tested are arranged on the installation platform.

[0025] As a preferred embodiment of the present invention: the loading device is a hydraulic cylinder.

[0026] As a preferred embodiment of the present invention: in the pit, limiting devices are installed around the test platform to prevent the test platform from overturning.

[0027] Beneficial effects:

[0028] (1) The present invention can realize static force and dynamic force loading on the propulsion shaft system of the ship (i.e., the shaft system to be measured) through the force loading unit, thereby realizing full-condition loading simulation; and can perform load simulation through the load simulation unit.

[0029] (2) The test platform where the shaft system to be tested is located is connected to the foundation via a vibration isolator, which can effectively isolate external vibrations and reduce the impact of external vibrations on the equipment on the platform.

[0030] (3) In the present invention, the height and levelness of the test platform can be adjusted by means of a vibration isolator, so that the shaft system under test can be in a horizontal state under any working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the static force and dynamic force full-condition loading simulation device of the present invention;

[0032] Among them: 1-test platform, 2-guide rail, 3-vibration isolator, 4-cement pier, 5-limit device, 6-installation platform, 7-prime mover, 81-thrust bearing A, 82-thrust bearing B, 9-tested shaft system, 10-coupling, 11-dynamometer, 12-moving wall, 13-loading device, 14-force sensor, 15-stop wall, 16-slider, 17-slide rail, 18-limit block, 19-moving wall base, 20-ground. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] This embodiment provides a static force and dynamic force full-condition loading simulation device, which can realize static force and dynamic force loading on the propulsion shaft system of a ship; and can also realize load simulation and vibration isolation.

[0035] like Figure 1 As shown, the static force and dynamic force full-condition loading simulation device includes: a force loading unit, a load simulation unit and a test platform 1; wherein the test platform 1 is connected to the foundation through a vibration isolator 3 to isolate external vibrations and prevent external vibrations from being transmitted to the test platform 1 through the ground; the measured shaft system 9 is installed on the test platform 1; the force loading unit is used to apply axial static loading force and dynamic loading force to the measured shaft system 9; the load simulation unit is used to realize load simulation of the measured shaft system 9.

[0036] Specifically: a pit for installing the test platform 1 is provided on the ground 20 , and a cement pier 4 is provided in the pit as an installation foundation for the test platform 1 . The test platform 1 is connected to the cement pier 4 via a plurality of vibration isolators 3 .

[0037] As an example, the vibration isolator 3 adopts an airbag vibration isolator, so that the height and levelness of the test platform 1 can be adjusted by adjusting the pressure of the airbag in the airbag vibration isolator. For example, the test platform 1 is connected to the cement pier 4 through four airbag vibration isolators distributed in a rectangular shape, and a displacement sensor is arranged next to each airbag vibration isolator to monitor the displacement of the corresponding position of the test platform 1 in real time. When different measured shaft systems 9 are installed on the test platform 1, if the test platform 1 tilts due to changes in weight, the pressure of the airbag vibration isolator is automatically adjusted according to the feedback of each displacement sensor to restore the test platform 1 to a horizontal position; thus, by adjusting the pressure of the airbag vibration isolator, the test platform 1 can always be in the same horizontal position.

[0038] As an example, in the pit, a limiting device 5 is installed around the test platform 1 (one end of the limiting device 5 is connected to the inner surface of the pit, and the other end has a set gap with the test platform 1) to prevent the test platform 1 from overturning.

[0039] A guide rail 2 is installed on the upper surface of the test platform 1, which is used to install the mounting platform 6 of the measured shaft system 9; as an example, the guide rail 2 is a T-shaped guide rail. The mounting platform 6 is fixed to the guide rail 2 and then installed on the test platform 1; by arranging the guide rail 2 on the test platform 1, a plurality of different mounting positions can be provided for the mounting platform 6, which facilitates the limited installation of the measured shaft system 9 on the test platform 1. The measured shaft system 9 is installed on the mounting platform 6, and the mounting platform 6 is installed on the guide rail 2 of the test platform 1 by bolts. At the same time, the prime mover 7 for providing power to the measured shaft system 9 to make it rotate is also installed on the mounting platform 6. A thrust bearing B82 is connected to the output shaft of the prime mover 7, and one end of the measured shaft system 9 ( Figure 1 The left end of the bearing is connected to the thrust bearing B82.

[0040] The surface of the test platform 1 is flush with the ground 20. A guide rail (the guide rail is also a T-shaped guide rail) is also provided on the ground 20 on one side of the test platform 1. The guide rail on the ground is located on the same straight line as the guide rail 2 on the test platform 1. A force loading unit (such as Figure 1 As shown, the force loading unit is disposed on the ground 20 on the right side of the test platform 1). Similarly, the guide rail on the ground is used to provide a plurality of different installation positions for the force loading unit, so as to facilitate the limited installation of the force loading unit on the ground 20.

[0041] The force loading unit includes: a loading device 13, a force sensor 14, a stop wall 15, a movable wall 12, a slider 16 and a slide rail 17; a movable wall base 19 is fixed to the guide rail on the ground 20 by bolts; the movable wall 12 and the movable wall base 19 are slidably matched, and can move on the movable wall base 19 in a direction parallel to the guide rail (i.e. Figure 1Specifically, a slider 16 is installed at the bottom of the movable wall 12, and the slider 16 slides with a slide rail 17 and can move along the slide rail 17. The slide rail 17 is installed on a movable wall base 19. Limiting blocks 18 are installed at both ends of the movable wall base 19 in the sliding direction of the movable wall 12 to prevent the movable wall 12 from detaching from the movable wall base 19.

[0042] The fixed end of the loading device 13 is connected to the movable wall 12, and the loading rod is connected to the stop wall 15 through the force sensor 14 (the loading rod of the loading device 13 can be linearly extended relative to its fixed end). The stop wall 15 is fixed to the guide rail of the ground 20 by bolts. As an example, the loading device 13 is a hydraulic cylinder.

[0043] The other end of the measured shaft system 9 (i.e. Figure 1 The right end in FIG. 1 is connected to the movable wall 12 via a load simulation unit.

[0044] When the loading device 13 is loaded, the loading rod of the loading device 13 extends, and the force sensor 14 feeds back the size of the pressure at this time; since the stop wall 15 is fixed, under the action of force, the movable wall 12 moves to the left along the slide rail 17 through the slider 16 (in this example, the stop wall 15 is located on the right side of the movable wall 12), thereby realizing axial loading of the measured shaft system 9; through the control of the loading device 13 by the program, dynamic force loading and static force loading are realized, dynamic force loading refers to the loading force being a dynamically changing value, and static force loading refers to the loading force being a fixed value.

[0045] After the loading device 13 is depressurized, the movable wall 12 can be returned to the initial position by reverse pressurization.

[0046] The load simulation unit includes: a dynamometer 11; a mounting platform for the load simulation unit is arranged on the left side of the movable wall 12 (i.e., the side away from the stop wall 15); the dynamometer 11 (or the load motor) is arranged on the mounting platform; the output shaft of the dynamometer 11 (i.e., Figure 1 The left side of the dynamometer 11 is connected with a thrust bearing A81; the shaft system 9 to be measured is connected with the thrust bearing A81 through a coupling 10. When the prime mover 7 is running, the dynamometer 11 is driven to run, thereby realizing load simulation.

[0047] When the loading device 13 performs static force or dynamic force loading, the load simulation of the prime mover 7 can be realized through the dynamometer 11 .

[0048] The device applies static and dynamic loading forces to the measured shaft system 9 through a force loading unit; the load simulation of the equipment can be achieved through a dynamometer 11; the measured shaft system 9 is installed on a test platform 1, and the test platform 1 is connected to the foundation through an airbag vibration isolator to isolate external vibrations.

[0049] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A static force and dynamic force full-condition loading simulation device, characterized in that: include: Force loading unit, load simulation unit, prime mover (7), test platform (1); The test platform (1) is connected to the foundation via a plurality of vibration isolators (3); The shaft system (9) to be tested is installed on the test platform (1); The force loading unit is used to apply axial static loading force and dynamic loading force to the measured shaft system (9); The load simulation unit is used to simulate the load of the shaft system (9) under test; The prime mover (7) is used to provide power to the measured shaft system (9) to make it rotate.

2. The static force and dynamic force full-condition loading simulation device according to claim 1, characterized in that: The force loading unit comprises: a loading device (13), a force sensor (14), a stop wall (15) and a movable wall (12); The movable wall base (19) is fixed on the ground (20), and the movable wall (12) is slidably matched with the movable wall base (19); The stop wall (15) is fixed on one side of the movable wall (12) on the ground (20); The fixed end of the loading device (13) is connected to the movable wall (12), and the loading rod is connected to the stop wall (15) via the force sensor (14); The loading device (13) is used to output a static loading force or a dynamic loading force; The measured shaft system (9) is connected to the other side of the movable wall (12) via the load simulation unit.

3. The static force and dynamic force full-condition loading simulation device according to claim 2 is characterized in that: The load simulation unit comprises: a dynamometer (11); A mounting platform for a load simulation unit is provided on one side of the movable wall (12) away from the stop wall (15); the dynamometer (11) is provided on the mounting platform; A thrust bearing A (81) is connected to the output shaft of the dynamometer (11); A thrust bearing B (82) is connected to the output shaft of the prime mover (7); One end of the measured shaft system (9) is connected to the thrust bearing B (82), and the other end is connected to the thrust bearing A (81) via a coupling (10).

4. The static force and dynamic force full-condition loading simulation device according to claim 2 or 3, characterized in that: The movable wall base (19) is fixed to a guide rail on the ground (20) by means of bolts; The stop wall (15) is fixed to a guide rail on the ground (20) by means of bolts.

5. The static force and dynamic force full-condition loading simulation device according to claim 2 or 3, characterized in that: Limiting blocks (18) are installed at both ends of the movable wall (12) on the movable wall base (19) in the sliding direction, so as to prevent the movable wall (12) from detaching from the movable wall base (19).

6. The static force and dynamic force full-condition loading simulation device according to any one of claims 1 to 3, characterized in that: The vibration isolator (3) is an airbag vibration isolator, and the height and levelness of the test platform (1) can be adjusted by adjusting the pressure of the airbag in the airbag vibration isolator.

7. The static force and dynamic force full-condition loading simulation device according to any one of claims 1 to 3, characterized in that: A pit for installing a test platform (1) is provided on the ground, and a cement support pier (4) is provided in the pit as an installation foundation for the test platform (1). The test platform (1) is connected to the cement support pier (4) via a plurality of vibration isolators (3).

8. The static force and dynamic force full-condition loading simulation device according to any one of claims 1 to 3, characterized in that: A plurality of guide rails (2) are installed on the upper surface of the test platform (1) to provide a plurality of different installation positions for the installation platform (6); the installation platform (6) is fixed to the guide rails (2) by bolts, and the prime mover (7) and the shaft system (9) to be tested are arranged on the installation platform (6).

9. The static force and dynamic force full-condition loading simulation device according to claim 2 or 3, characterized in that: The loading device (13) is a hydraulic cylinder.

10. The static force and dynamic force full-condition loading simulation device according to claim 7, characterized in that: In the pit, limiting devices (5) are installed around the test platform (1) to prevent the test platform (1) from tipping over.

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