Test support device mass inertia balancing system and mass inertia balancing method

Abstract

The invention provides a test support device mass inertia balancing system and a mass inertia balancing method. The test support device mass inertia balancing system comprises an oil conveying pipe, two hydraulic cylinder oil pipes, an oil return pipe, a hydraulic cylinder, a heaving motion guide rail and a test model support component, the output rod is provided with a displacement sensor, and the test model supporting part is provided with a speed and acceleration sensor. A force sensor is arranged on the test model supporting part so as to detect the acting force between the test model supporting part and a tested piece mounted on the test model supporting part; and according to the acting force and the speed and acceleration detected by the speed and acceleration sensor, at least the servo valve is controlled so as to control the lifting of the test model supporting part and enable the acting force to be within a preset value, thereby balancing the mass and inertia of the test model supporting part. Therefore, the quality and inertia of the test model supporting part do not affect the model test.

Description

Technical Field

[0001] The invention relates to the technical field of flow field testing, and in particular to a mass inertia balancing system and a mass inertia balancing method for a test support device. Background Art

[0002] Flow field test is a crucial experimental method in the field of fluid mechanics, mainly used to study the dynamic characteristics of objects in fluid flow. Flow field test is to place an object model in the flow field and artificially create fluid flow to study the fluid flow and its interaction with the model. There is vertical motion in the flow field test. Usually, the test model support components are used to lift the test piece to the middle position and then conduct the experiment. Actual experiments have found that the mass and inertia of the test model support components have a relatively large impact on the flow field motion of the test piece. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a mass-inertia balancing system and a mass-inertia balancing method for a test support device that overcome the above problems or at least partially solve the above problems, and can achieve balancing of the mass and inertia of the test model support components during the heaving motion of the flow field test, and the mass and inertia of the test model support components do not affect the model test.

[0004] Specifically, the present invention provides a mass inertia balancing system for a test support device, which includes an oil delivery pipe, two hydraulic cylinder oil pipes, an oil return pipe, a hydraulic cylinder, a heave motion guide rail, and a test model support component;

[0005] The test model support component is installed on the vertical swing motion guide rail in a manner that it can move up and down. The output rod of the hydraulic cylinder is vertically arranged and connected to the test model support component. The outlets of the two hydraulic cylinder oil pipes are respectively connected to the two oil chambers of the hydraulic cylinder.

[0006] The two hydraulic cylinder oil pipes are connected to the oil delivery pipe and the oil return pipe through a servo valve, and the servo valve is configured to make one hydraulic cylinder oil pipe communicate with the oil delivery pipe and the other hydraulic cylinder oil pipe communicate with the oil return pipe; the oil delivery pipe is connected to an accumulator;

[0007] A displacement sensor is provided on the output rod, and a velocity and acceleration sensor is provided on the test model support component; a force sensor is provided on the test model support component to detect the acting force between the test model support component and the test piece mounted on the test model support component; and at least the servo valve is controlled according to the acting force, the velocity and the acceleration detected by the velocity and acceleration sensor to control the lifting and lowering of the test model support component and make the acting force within a preset value, thereby balancing the mass and inertia of the test model support component.

[0008] Optionally, each hydraulic cylinder oil pipe is connected to a safety valve, and each safety valve is connected to the oil return pipe via an oil return branch pipe.

[0009] Optionally, there are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component;

[0010] Each hydraulic cylinder oil pipe is connected to the corresponding oil chambers of the two hydraulic cylinders through two branch pipes. A shuttle valve is arranged between the two branch pipes. The shuttle valve is connected to the corresponding safety valve so that the safety valve is connected to each hydraulic cylinder oil pipe.

[0011] Optionally, the mass inertia balancing system of the test support device further comprises a pressure reducing valve arranged on the oil pipeline;

[0012] The accumulator is connected to the oil pipeline between the pressure reducing valve and the servo valve; a first pressure sensor is connected to the section of the oil pipeline between the pressure reducing valve and the servo valve.

[0013] Optionally, a second pressure sensor is connected to the pipeline of each branch pipe between the connecting point of the oil chamber and the shuttle valve.

[0014] Optionally, it further comprises a guide rail clamp and a clamp control valve; the clamp control valve is connected to the oil delivery pipe, the guide rail clamp and the oil return pipe through a clamp pipeline;

[0015] The guide rail clamp is installed between the test model support component and the heave motion guide rail, and the guide rail clamp moves with the test model support component;

[0016] The clamp pipeline is connected to a rail clamp control oil circuit pressure sensor;

[0017] The clamp pipeline is connected to the oil delivery pipeline between the pressure reducing valve and the servo valve.

[0018] Optionally, the lower end of the cylinder body of the hydraulic cylinder is universally connected to a fixed base of the artificial flow field; and the upper end of the output rod is universally connected to the test model supporting component.

[0019] Optionally, an upper limit buffer is provided on the upper side of the test model support component, and a lower limit buffer is provided on the lower side.

[0020] The present invention also provides a mass inertia balancing method using any of the mass inertia balancing systems of the test support device, comprising:

[0021] Acquiring position information using the displacement sensor;

[0022] Controlling the servo valve according to the position information to move the test model support component to a preset position;

[0023] Adjusting the test model support component and the artificial flow field where the test piece mounted on the test model support component is located;

[0024] Acquiring the force, the velocity and the acceleration using a velocity and acceleration sensor and the force sensor;

[0025] At least the servo valve is controlled according to the force, the speed and the acceleration to control the lifting and lowering of the test model supporting component, and the force is kept within a preset value when controlling the lifting and lowering of the test model supporting component.

[0026] In the test support device mass-inertia balancing system and mass-inertia balancing method of the present invention, since a displacement sensor, a velocity and acceleration sensor, and a force sensor are provided, at least a servo valve can be controlled according to the applied force, velocity, and acceleration, thereby controlling the lifting and lowering of the test model support component and making the applied force within a preset value, thereby being able to balance the mass and inertia of the test model support component, and also ensuring that the mass and inertia of the test model support component do not affect the model test.

[0027] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0029] Figure 1 is a schematic structural diagram of a mass inertia balancing system of a test support device according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic partial structural diagram of a mass inertia balancing system of a test support device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Refer to the following Figure 1 to Figure 2To describe the mass-inertia balancing system and the mass-inertia balancing method of the test support device of the embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0032] Unless otherwise clearly defined and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person skilled in the art should be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0033] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] Figure 1FIG. 1 is a schematic structural diagram of a mass inertia balancing system of a test support device according to an embodiment of the present invention. Figure 1 As shown, and refer to Figure 2 An embodiment of the present invention provides a mass inertia balancing system for a test support device, including an oil delivery pipe 21, two hydraulic cylinder oil pipes 22, an oil return pipe 23, an artificial flow field 70, a hydraulic cylinder 40, a vertical swing motion guide rail 61 and a test model support component 60.

[0036] The test model support component 60 is movably mounted on the vertical swing motion guide rail 61, and the output rod 41 of the hydraulic cylinder 40 is vertically arranged and connected to the test model support component 60. The outlets of the two hydraulic cylinder oil pipes 22 are connected to the two oil chambers of the hydraulic cylinder 40 respectively.

[0037] The oil delivery pipe 21 is connected to an accumulator 24, which is a pressure-stabilizing accumulator that can stabilize the pressure of the external oil source. The external oil source provides high-pressure hydraulic oil to the overall system through the oil delivery pipe 21.

[0038] The two hydraulic cylinder oil pipes 22 are connected to the oil delivery pipe 21 and the oil return pipe 23 through the servo valve 33 . The servo valve 33 is configured to connect one hydraulic cylinder oil pipe 22 to the oil delivery pipe 21 and the other hydraulic cylinder oil pipe 22 to the oil return pipe 23 .

[0039] A displacement sensor 81 is provided on the output rod 41, and a speed and acceleration sensor 82 is provided on the test model support component 60; a force sensor 83 is provided on the test model support component 60 to detect the force between the test model support component 60 and the test piece installed on the test model support component 60; and at least the servo valve 33 is controlled according to the speed and acceleration detected by the force, speed and acceleration sensor 82 to control the lifting and lowering of the test model support component 60 and make the force within a preset value, thereby balancing the mass and inertia of the test model support component 60.

[0040] When the mass inertia balancing system of the test support device of the embodiment of the present invention is working, hydraulic oil is delivered to the accumulator 24. After the pressure in the accumulator 24 reaches a preset value, the servo valve 33 is controlled to connect the hydraulic cylinder oil pipe 22 of the rodless chamber 43 of the hydraulic cylinder 40 with the oil delivery pipe 21, and at the same time, the hydraulic cylinder oil pipe 22 of the rod chamber 42 of the hydraulic cylinder 40 is connected with the return oil pipe 23. Based on the information obtained by the displacement sensor 81, the output rods 41 of the two hydraulic cylinders 40 are moved upward, and the test model support component 60 is driven to move to a preset position. Then, the artificial flow field 70 is adjusted, and a flow field test is performed. During the flow field test, the velocity and acceleration sensor and the force sensor 83 are used to obtain the force, velocity and acceleration. Then, the control device of the mass inertia balancing system of the test support device can at least control the servo valve 33 according to the force, velocity and acceleration to control the lifting and lowering of the test model support component 60, and the force is kept within the preset value when controlling the lifting and lowering of the test model support component 60. Preferably, the force is made zero, that is, the force between the test model supporting component 60 and the test piece mounted on the test model supporting component 60 is close to 0, that is, there is basically no force between the test model supporting component 60 and the test piece.

[0041] In the mass-inertia balancing system of the test support device of the embodiment of the present invention, since it has a displacement sensor 81, a velocity and acceleration sensor 82, and a force sensor 83, it can control at least the servo valve 33 according to the force, velocity and acceleration, and then control the lifting and lowering of the test model support component 60 and make the force within a preset value, so that the mass and inertia of the test model support component 60 can be balanced, which also makes the mass and inertia of the test model support component 60 not affect the model test.

[0042] In some embodiments of the present invention, the oil delivery pipe 21 is further provided with a pressure reducing valve 38. The accumulator 24 is connected to the oil delivery pipe 21 on the pipe section between the pressure reducing valve 38 and the servo valve 33. The pressure reducing valve 38 is also connected to the oil return pipe 23. The pressure reducing valve 38 can reduce the pressure to the required working pressure. A safety valve 39 is also connected to each hydraulic cylinder oil pipe 22, and each safety valve 39 is connected to the oil return pipe 23 through the oil return branch pipe. The safety protection of the hydraulic cylinder 40 is achieved by setting the pressure of the safety valve 39. The safety valve 39 can be a direct-acting overflow valve.

[0043] In some embodiments of the present invention, there are two hydraulic cylinders 40, which are respectively arranged on both sides of the test model support component 60. The lower end of the cylinder body of the hydraulic cylinder 40 is universally connected to the artificial flow field 70. Specifically, a fixed base is provided in the artificial flow field 70, and the lower end of the cylinder body of the hydraulic cylinder 40 is universally connected to the fixed base through a ball joint. The upper end of the output rod 41 is universally connected to the test model support component 60. Specifically, a ball joint is provided between the upper end of the output rod 41 and the test model support component 60. An upper limit buffer 65 is provided on the upper side of the test model support component 60, and a lower limit buffer 66 is provided on the lower side. The hydraulic cylinder 40 is a high-frequency double-acting servo hydraulic cylinder.

[0044] In some embodiments of the present invention, each hydraulic cylinder oil pipe 22 is connected to the corresponding oil chambers of the two hydraulic cylinders 40 through two branch pipes 28, and a shuttle valve 37 is provided between the two branch pipes 28. The shuttle valve 37 is connected to the corresponding safety valve, so that the safety valve is connected to each hydraulic cylinder oil pipe 22. By providing the shuttle valve 37, the entire oil circuit structure can be simplified and easy to control. By providing the shuttle valve 37, the pressure between the two corresponding oil chambers can be equalized, and the situation that one oil chamber has a high pressure and the other oil chamber has a low pressure will not occur, which is conducive to the synchronous and stable movement of the two hydraulic cylinders.

[0045] In some embodiments of the present invention, a first pressure sensor 51 is connected to the section of the oil delivery pipe 21 between the pressure reducing valve 38 and the servo valve 33, which is used to detect the pressure of the oil delivery pipe 21 after the pressure is reduced by the pressure reducing valve 38, which can also be called the oil inlet pressure. A second pressure sensor 53 is connected to the pipeline between the oil chamber and the connection point of the shuttle valve 37 of each branch pipe 28, which is used to detect the pressure of the oil chamber of the hydraulic cylinder 40. There are two second pressure sensors 53, which respectively detect the pressure of the rodless chamber and the pressure of the rod chamber.

[0046] In some embodiments of the present invention, the mass inertia balancing system of the test support device further includes a guide rail clamp 55 and a clamp control valve 56. The clamp control valve 56 connects the oil pipeline 21, the guide rail clamp 55 and the oil return pipe 23 through the clamp pipeline 57. The guide rail clamp 55 is installed between the test model support component 60 and the sinking and floating motion guide rail 61, and the guide rail clamp 55 moves with the test model support component 60. The clamp control valve 56 is a three-way electromagnetic stop valve. There can be four guide rail clamps 55. A guide rail clamp control oil circuit pressure sensor 58 is connected to the clamp pipeline 57. The clamp pipeline 57 is connected to the oil pipeline 21 between the pressure reducing valve and the servo valve 33.

[0047] An embodiment of the present invention further provides a mass inertia balancing method using the mass inertia balancing system of the test support device in any of the above embodiments, comprising:

[0048] Using the displacement sensor 81 to obtain position information;

[0049] Control the servo valve 33 according to the position information to move the test model support component 60 to a preset position;

[0050] Adjusting the test model support component 60 and the artificial flow field 70 where the test piece mounted on the test model support component 60 is located;

[0051] Using the velocity and acceleration sensor 82 and the force sensor 83 to obtain the force, velocity and acceleration;

[0052] At least the servo valve 33 is controlled according to the force, speed and acceleration to control the lifting and lowering of the test model supporting component 60 , and the force is kept within a preset value when controlling the lifting and lowering of the test model supporting component 60 .

[0053] Specifically, in some embodiments of the present invention, before the flow field test begins, the test model support component 60 and the test piece on the test model support component 60 are both in the lowest position, parked on the lower limit buffer 66, the clamp control valve 56 loses power, and the guide rail clamp 55 is clamped.

[0054] Mass inertia balancing methods include:

[0055] Adjust the pressure of the two safety valves to the preset safety protection pressure.

[0056] The clamp control valve 56 is energized, the rail clamp 55 is released, and the position information is obtained by using the displacement sensor 81; the servo valve 33 is controlled according to the position information to make the test model support component 60 and the test piece thereon move to the middle position. After the adjustment is completed, the clamp control valve 56 is de-energized, the rail clamp 55 is clamped, and the flow field 70 is waited for adjustment.

[0057] After the flow field 70 is adjusted, the clamp control valve 56 is energized, the guide rail clamp 55 is released, and the freedom of the heave motion is released.

[0058] The external flow field 70 is adjusted, and the test model support component 60 performs heaving motion at different frequencies in the vertical direction along the heaving motion guide rail 61. At the same time, the velocity and acceleration sensors and the force sensor 83 are used to obtain the force, velocity and acceleration; according to the force, velocity and acceleration, at least the servo valve 33 is controlled to control the lifting and lowering of the test model support component 60, and when controlling the lifting and lowering of the test model support component 60, the force is kept within a preset value.

[0059] When the system detects an abnormality or an emergency stop is made, the clamp control valve 56 loses power and the heave motion is locked in a short period of time.

[0060] When the flow field test ends normally, the test model support component 60 and the tested object slowly descend to the lower limit position, and the clamp control valve 56 loses power to lock the heave motion.

[0061] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A mass inertia balancing system for a test support device, characterized in that: It includes an oil delivery pipe, two hydraulic cylinder oil pipes, an oil return pipe, a hydraulic cylinder, a heave motion guide rail and a test model support component; The test model support component is installed on the vertical swing motion guide rail in a manner that it can move up and down. The output rod of the hydraulic cylinder is vertically arranged and connected to the test model support component. The outlets of the two hydraulic cylinder oil pipes are respectively connected to the two oil chambers of the hydraulic cylinder. The two hydraulic cylinder oil pipes are connected to the oil delivery pipe and the oil return pipe through a servo valve, and the servo valve is configured to make one hydraulic cylinder oil pipe communicate with the oil delivery pipe and the other hydraulic cylinder oil pipe communicate with the oil return pipe; the oil delivery pipe is connected to an accumulator; The output rod is provided with a displacement sensor, and the test model support component is provided with a velocity and acceleration sensor; the test model support component is provided with a force sensor to detect the force between the test model support component and the test piece mounted on the test model support component; At least the servo valve is controlled according to the force, the speed and the acceleration detected by the speed and acceleration sensors to control the lifting and lowering of the test model support component and make the force within a preset value, thereby balancing the mass and inertia of the test model support component.

2. The mass inertia balancing system of the test support device according to claim 1, characterized in that: A safety valve is connected to the oil pipe of each hydraulic cylinder, and each safety valve is connected to the oil return pipe through an oil return branch pipe.

3. The test support device mass inertia balancing system according to claim 2, characterized in that: There are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component; Each hydraulic cylinder oil pipe is connected to the corresponding oil chambers of the two hydraulic cylinders through two branch pipes. A shuttle valve is arranged between the two branch pipes. The shuttle valve is connected to the corresponding safety valve so that the safety valve is connected to each hydraulic cylinder oil pipe.

4. The mass inertia balancing system of the test support device according to claim 1, characterized in that: It also includes a pressure reducing valve disposed on the oil delivery pipe; the pressure reducing valve is also connected to the oil return pipe; The accumulator is connected to the oil pipeline between the pressure reducing valve and the servo valve; a first pressure sensor is connected to the section of the oil pipeline between the pressure reducing valve and the servo valve.

5. The mass inertia balancing system of the test support device according to claim 2, characterized in that: A second pressure sensor is connected to the pipeline of each branch pipe between the oil chamber and the connection point of the shuttle valve.

6. The mass inertia balancing system of the test support device according to claim 4, characterized in that: It also includes a guide rail clamp and a clamp control valve; the clamp control valve is connected to the oil delivery pipe, the guide rail clamp and the oil return pipe through a clamp pipeline; The guide rail clamp is installed between the test model support component and the heave motion guide rail, and the guide rail clamp moves with the test model support component; The clamp pipeline is connected to a rail clamp control oil circuit pressure sensor; The clamp pipeline is connected to the oil delivery pipeline between the pressure reducing valve and the servo valve.

7. The mass inertia balancing system of the test support device according to claim 1, characterized in that: The lower end of the cylinder body of the hydraulic cylinder is universally connected to the fixed base of the artificial flow field; the upper end of the output rod is universally connected to the test model supporting component.

8. The mass inertia balancing system of the test support device according to claim 1, characterized in that: An upper limit buffer is arranged on the upper side of the test model supporting component, and a lower limit buffer is arranged on the lower side.

9. A mass inertia balancing method using the mass inertia balancing system of a test support device according to any one of claims 1 to 8, characterized in that: include: Acquiring position information using the displacement sensor; Controlling the servo valve according to the position information to move the test model support component to a preset position; Adjusting the test model support component and the artificial flow field where the test piece mounted on the test model support component is located; Acquiring the force, the velocity and the acceleration using a velocity and acceleration sensor and the force sensor; At least the servo valve is controlled according to the force, the speed and the acceleration to control the lifting and lowering of the test model supporting component, and the force is kept within a preset value when controlling the lifting and lowering of the test model supporting component.

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